As filed with the Securities and Exchange Commission on August 18, 2000
Registration No. 333-


SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549


FORM S-1
REGISTRATION STATEMENT
Under The Securities Act of 1933


NATUS MEDICAL INCORPORATED
(Exact name of Registrant as specified in its charter)


    Delaware                      3845                            77-0154833
(State or other
 jurisdiction of      (Primary Standard Industrial             (I.R.S. Employer
incorporation or
  organization)       Classification Code Number)           Identification Number)

1501 Industrial Road
San Carlos, CA 94070
(650) 802-0400
(Address, including zip code, and telephone number, including area code, of
Registrant's principal executive offices)


William H. Lawrenson
Chief Financial Officer
1501 Industrial Road
San Carlos, CA 94070
(650) 802-0400
(Name, address, including zip code, and telephone number, including area code,
of agent for service)


Please send copies of all communications to:
     Robert P. Latta, Esq.                             John W. White, Esq.
       Julia Reigel, Esq.                            Cravath, Swaine & Moore
     G. Scott Giesler, Esq.                              WorldWide Plaza
Wilson Sonsini Goodrich & Rosati                        825 Eighth Avenue,
    Professional Corporation                       New York New York 10019-7475
       650 Page Mill Road                                 (212) 474-1000
    Palo Alto, CA 94304-1050
         (650) 493-9300


Approximate date of commencement of proposed sale to the public:
As soon as practicable after the effective date of this Registration Statement.
If the securities being registered on this Form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933, as amended (the "Securities Act"), please check the following box. [_] If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, please check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. [_] If this Form is a post-effective amendment filed pursuant to Rule 462(c) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. [_]
If this Form is a post-effective amendment filed pursuant to Rule 462(d) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. [_]
If delivery of the prospectus is expected to be made pursuant to Rule 434, please check the following box. [_]

CALCULATION OF REGISTRATION FEE


    Title of Each Class           Proposed Maximum
    of Securities to be          Aggregate Offering             Amount of
         Registered                   Price(1)               Registration Fee
-----------------------------------------------------------------------------
Common stock, $0.001 par
 value.....................         $50,600,000                 $13,358.40
-----------------------------------------------------------------------------


(1) Estimated solely for the purpose of computing the amount of the registration fee pursuant to Rule 457(o) under the Securities Act of 1933. The Registrant hereby amends this Registration Statement on such date or dates as may be necessary to delay its effective date until the Registrant shall file a further amendment which specifically states that this Registration Statement shall thereafter become effective in accordance with Section 8(a) of the Securities Act of 1933 or until the Registration Statement shall become effective on such date as the Commission, acting pursuant to said Section 8(a), may determine.



++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

+The information in this preliminary prospectus is not complete and may be     +
+changed. We may not sell these securities until the registration statement    +
+filed with the Securities and Exchange Commission is effective. This          +
+preliminary prospectus is not an offer to sell these securities and is not    +
+soliciting an offer to buy these securities in any state where the offer or   +
+sale is not permitted.                                                        +

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ SUBJECT TO COMPLETION, DATED AUGUST 18, 2000

PROSPECTUS

Shares

Natus Medical Incorporated

Common Stock


We are selling shares of our common stock. We have granted the underwriters a 30-day option to purchase up to an additional shares of common stock to cover over-allotments.

This is the initial public offering of our common stock. We currently expect that the initial public offering price will be between $ and $ per share. We have applied to have our common stock included for quotation on the Nasdaq National Market under the symbol "BABY."


Investing in our common stock involves certain risks. See "Risk Factors" beginning on page 8.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or determined if this prospectus is truthful or complete. Any representation to the contrary is a criminal offense.


                                                           Per
                                                          Share  Total
                                                          ------ ------
Public Offering Price                                     $      $
Underwriting Discount                                     $      $
Proceeds to Natus Medical Incorporated (before expenses)  $      $

The underwriters expect to deliver the shares to purchasers on or about , 2000.


Salomon Smith Barney
Dain Rauscher Wessels
Prudential Vector Healthcare a unit of Prudential Securities

, 2000


[Artwork:
Text reads as follows:
ALGO(R) Newborn Hearing Screeners use AABR(TM) Automated Auditory Brainstem Response technology, which screens the entire hearing pathway from the ear to the brainstem.

Picture of ALGO Newborn Hearing Screener in use.

Text surrounding the picture reads as follows (counter-clockwise):
1. The ALGO screener sends a series of soft clicking sounds into the baby's ear.
2. The baby's brain responds with a specific brainwave pattern called the auditory brainstem response (ABR).
3. The screener automatically compares the baby's ABR to a stored template from normal hearing infants.
4. The ALGO screener prints pass/refer results after every screen.

Caption at bottom of page reads:
NATUS because every baby is precious]


TABLE OF CONTENTS

                                                                          Page
                                                                          ----
Prospectus Summary.......................................................   4

Risk Factors.............................................................   8

Information Regarding Forward-Looking Statements.........................  21

Use of Proceeds..........................................................  22

Our Policy Regarding Dividends...........................................  22

Capitalization...........................................................  23

Dilution.................................................................  24

Selected Financial Data..................................................  25

Management's Discussion and Analysis of Financial Condition and Results
 of Operations...........................................................  27

Business.................................................................  37

Management...............................................................  58

Relationships and Related Party Transactions.............................  68

Principal Stockholders...................................................  71

Description of Capital Stock.............................................  74

Shares Eligible for Future Sale..........................................  78

United States Tax Consequences to Non-United States Holders..............  80

Underwriting.............................................................  82

Legal Matters............................................................  84

Experts..................................................................  84

Where You Can Find Additional Information................................  84

Index to Financial Statements............................................ F-1

Until , 2000, all dealers that buy, sell or trade our common stock, whether or not participating in this offering, may be required to deliver a prospectus. This is in addition to the dealers' obligation to deliver a prospectus when acting as underwriters and with respect to their unsold allotments or subscriptions.

3

PROSPECTUS SUMMARY

This summary highlights information contained elsewhere in this prospectus. This summary does not contain all of the information you should consider before buying shares in this offering. Therefore, you should read this entire prospectus carefully, including the risks of purchasing our common stock discussed under the "Risk Factors" section and our financial statements and the related notes.

Our Business

We are a medical device company focused on developing, manufacturing and marketing screening products for the identification and monitoring of common medical disorders that may occur in the critical developmental period from conception to a baby's first birthday. Currently, we are selling our ALGO products for newborn hearing screening, and, in early 2001, we expect to begin actively marketing our CO-Stat products for the evaluation of jaundice, a potentially toxic condition that can cause the skin to turn yellow. Both of our current product lines are comprised of hardware units and single-use disposable components and both product lines have been cleared for marketing by the United States Food and Drug Administration, or the FDA. We believe our products deliver accurate crib-side results in a rapid and reliable manner, and are simple to use and cost-effective. In addition, our products address the American Academy of Pediatrics' standard of care guidelines.

Our ALGO products use automated auditory response brainstem technology, or automated ABR, to enable simple, non-invasive and accurate screening for hearing impairment in newborns. The ALGO screener delivers sound stimuli to a newborn's ears and analyzes brain wave responses to produce a "Pass" or "Refer" result. The screening can be performed within hours after birth. In addition, the ALGO meets the American Academy of Pediatrics' guidelines without requiring a trained audiologist to operate the equipment. We currently sell our ALGO products in the United States, Europe, Japan, Australia and New Zealand. Our ALGO products have been installed in approximately 40% of the approximately 4,000 hospitals with birthing facilities in the United States. In 1999, we sold disposable supplies to conduct approximately 1.2 million tests, and in the six months ended June 30, 2000, we sold disposable supplies to conduct approximately 770,000 tests.

In addition to ALGO products, we have developed the CO-Stat analyzer that, within hours after birth, enables physicians to assess the likelihood that serious newborn jaundice will not occur. Jaundice may be a sign of an abnormally high rate of hemolysis, which is the process by which red blood cells in the human body are destroyed. Our CO-Stat analyzers accurately and non-invasively measure the rate of hemolysis by detecting the level of carbon monoxide in exhaled breath. In addition, we are currently investigating the use of the CO-Stat for other conditions, including pregnancy induced hypertension. To date, we have sold our CO-Stat system primarily for clinical research.

Our Market Opportunity

Early detection of disorders for which treatments are readily available maximizes the possibility of achieving the best outcome for the child and reduces the social impact and the financial cost of treatment and habilitation. Our products address hearing impairment and jaundice, which are among the more common disorders a baby may face after birth.

Each year, there are approximately 3.8 million births in the United States, and approximately 10.5 million births in all industrialized countries. Impaired hearing affects approximately six per 1,000 newborns in the United States. Undetected hearing impairment may result in the failure to learn, process spoken language or speak. The annual cost to society of profound newborn hearing impairment is estimated to be approximately $79 billion in the United States due to increased educational costs, lower lifetime income and higher unemployment. Early identification and habilitation can mitigate the effects of this disorder, regardless of its

4

severity. Recent clinical evidence in support of early detection for hearing impairment combined with the introduction of new technologies has led health organizations, such as the American Academy of Pediatrics, and state governments to endorse universal newborn hearing screening programs. As a result, we estimate that 88% of births in the United States during 2000 will occur in states with mandates or pending mandates for universal newborn hearing screening. In addition, we estimate that hospitals in four other states without mandates or pending mandates will screen more than half of newborns in those states. Although universal newborn hearing screening is less prevalent outside the United States, some foreign governments, such as those in Japan and regions of Belgium, have begun to implement newborn hearing screening initiatives. We believe a significant opportunity exists in international markets to increase the population of newborns screened for hearing impairment.

Jaundice affects over half of all newborns and may be indicative of serious conditions that can result in irreversible brain damage or death. Due to the potentially serious implications of jaundice, the American Academy of Pediatrics recommends that every newborn be closely monitored for jaundice and that physicians should definitively determine the presence or absence of an abnormal rate of hemolysis to establish the appropriate treatment for babies with jaundice. However, since jaundice is most often detected visually more than three days after birth, the need for definitive evaluation is often not established before a newborn's discharge from the hospital. We believe that hospitals in the United States spend approximately $1.3 billion per year to treat neonatal jaundice in the hospital, mainly due to late detection and subsequent readmission for evaluation.


We were incorporated in California on May 26, 1987 under the name Medical Instruments, Inc. On July 10, 1987, we changed our name to ALGOTEK Instruments, Inc., and on September 29, 1998 we changed our name to Natus Medical Incorporated. We reincorporated in Delaware in August 2000. Our principal executive offices are located at 1501 Industrial Road, San Carlos, California 94070, and our telephone number is (650) 802-0400.

Natus(R); 70-40(R); ALGO(R); ALGO 1e(R); ALGO 2(R); ALGO2e; ALGO 2e Color; ALGO Portable; ALGO Databook(R); ALGO DataBook NHS Data Tracking System; CO- Stat(R); CO-Stat End Tidal Breath Analyzer; Dri-Prep(R); Ear Couplers(R); Jelly Button(R); MiniMuffs(R); Duracoupler; AABR; and ALGO 3 are our trademarks. Other service marks, trademarks and trade names referred to in this prospectus are the property of their respective owners.

5

The Offering

Common stock offered..........................       shares
Common stock outstanding after this offering..       shares
Use of proceeds............................... To fund international
                                               expansion, working capital,
                                               capital expenditures, general
                                               corporate purposes and
                                               potential acquisitions of
                                               complementary businesses,
                                               products and technologies.
Proposed Nasdaq National Market symbol........ "BABY"

Unless otherwise noted, all information in this prospectus:

. assumes no exercise of the underwriters' option to purchase up to additional shares of our common stock to cover over-allotments;

. reflects a two-for-five reverse split of our common and preferred stock in August 2000;

. reflects the conversion of each outstanding share of our convertible preferred stock into one share of common stock, or an aggregate of 8,931,534 shares, concurrently with the completion of this offering;

. assumes our reincorporation into Delaware prior to completion of this offering; and

. assumes the filing of our amended and restated certificate of incorporation authorizing a class of 10,000,000 shares of undesignated preferred stock concurrently with the completion of this offering.

The number of shares of common stock to be outstanding immediately after this offering:

. is based upon 9,684,520 shares of common stock outstanding as of June 30, 2000 assuming conversion of all convertible preferred stock;

. does not take into account 1,326,123 shares of common stock issuable upon the exercise of options outstanding as of June 30, 2000 at a weighted average exercise price of $1.09 per share;

. does not take into account 1,500,000 shares of common stock available for future issuance under our 2000 stock option plan;

. does not take into account 1,000,000 shares of common stock available for future issuance under our 2000 employee stock purchase plan; and

. does not take into account 400,000 shares of common stock available for future issuance under our 2000 director option plan.

6

SUMMARY FINANCIAL DATA

                                                                         Six Months
                                 Years Ended December 31,              Ended June 30,
                          -------------------------------------------  ---------------
                           1995     1996     1997     1998     1999     1999    2000
                          -------  -------  -------  -------  -------  ------  -------
                                 (in thousands, except per share amounts)
Statement of Operations
 Data:
Net revenues............  $ 4,274  $ 6,501  $10,031  $15,884  $19,783  $8,918  $11,009
Cost of revenues........    2,027    2,567    3,612    5,577    6,624   3,082    3,908
                          -------  -------  -------  -------  -------  ------  -------
 Gross profit...........    2,247    3,934    6,419   10,307   13,159   5,836    7,101
                          -------  -------  -------  -------  -------  ------  -------
Operating expenses:
 Marketing and selling..    2,105    2,828    4,259    6,275    7,684   3,654    4,395
 Research and
  development...........      645      962    1,602    2,711    2,457   1,288    1,605
 General and
  administrative........      648      829    1,231    1,638    2,384   1,021    1,152
 Amortization of
  deferred stock
  compensation..........      --       --       --       --       --      --       278
                          -------  -------  -------  -------  -------  ------  -------
  Total operating
   expenses.............    3,398    4,619    7,092   10,624   12,525   5,963    7,430
                          -------  -------  -------  -------  -------  ------  -------
Income (loss) from
 operations.............   (1,151)    (685)    (673)    (317)     634    (127)    (329)
Other income (expense),
 net....................      (12)      21       97      118       20       5       12
                          -------  -------  -------  -------  -------  ------  -------
Income (loss) before
 taxes..................   (1,163)    (664)    (576)    (199)     654    (122)    (317)
Income tax expense......      --       --       --       --        10     --       --
                          -------  -------  -------  -------  -------  ------  -------
Net income (loss).......   (1,163)    (664)    (576)    (199)     644    (122)    (317)
Accretion of redeemable
 convertible preferred
 stock..................      625    1,079    1,292    1,389    2,085     695      692
                          -------  -------  -------  -------  -------  ------  -------
Net loss available to
 common stockholders....  $(1,788) $(1,743) $(1,868) $(1,588) $(1,441) $ (817) $(1,009)
                          =======  =======  =======  =======  =======  ======  =======
Basic and diluted net
 loss per share.........  $(20.55) $(16.29) $ (7.62) $ (3.63) $ (2.56) $(1.47) $ (1.59)
                          =======  =======  =======  =======  =======  ======  =======
Shares used in computing
 basic and diluted net
 loss per share.........       87      107      245      438      562     557      633
Pro forma basic and
 diluted net loss per
 share..................                                      $ (0.17)         $ (0.11)
                                                              =======          =======
Shares used in computing
 pro forma basic and
 diluted net loss per
 share..................                                        8,478            9,565

During the six months ended June 30, 2000, we amortized deferred stock compensation of $353,000, of which $75,000 was included in cost of revenues and $278,000 was included in operating expenses. The amortization of deferred stock compensation allocated to operating expenses was comprised of expenses related to marketing and selling of $91,000, research and development of $48,000 and general and administrative of $139,000.

Pro forma basic and diluted net loss per share for the year ended December 31, 1999 and the six months ended June 30, 2000 have been calculated assuming the conversion of all outstanding shares of our convertible preferred stock as of June 30, 2000 into 8,931,534 shares of common stock as if the stock had been converted at the beginning of the respective period.

                                                       June 30, 2000
                                               -------------------------------
                                                                    Pro Forma
                                                Actual   Pro Forma As Adjusted
                                               --------  --------- -----------
                                                       (in thousands)
Balance Sheet Data:
Cash, cash equivalents and short-term
 investments.................................. $  1,805   $1,805      $
Working capital...............................    3,859    3,859
Total assets..................................    9,059    9,059
Convertible preferred stock...................   24,534      --
Total stockholders' equity (deficit)..........  (18,811)   5,723

The pro forma balance sheet data reflects the conversion of all outstanding shares of convertible preferred stock as of June 30, 2000 into 8,931,534 shares of common stock upon the closing of this offering. The pro forma as adjusted balance sheet data further reflects the sale of shares of common stock in this offering at an assumed initial public offering price of $ after deducting estimated underwriting discounts, commissions and offering expenses.

7

RISK FACTORS

An investment in our common stock involves significant risks. You should carefully consider the following risks described below and the other information in this prospectus including our financial statements and related notes before you decide to buy our common stock. The trading price of our common stock could decline due to any of these risks, and you could lose all or part of your investment.

We have a history of losses and may experience losses in the future, which may result in the market price of our common stock declining

Since our inception, we have incurred significant net losses, including net losses available to common stockholders of $1.9 million in 1997, $1.6 million in 1998, $1.4 million in 1999 and $1.0 million in the six months ended June 30, 2000. In addition, we had an accumulated deficit of $19.5 million as of June 30, 2000. We expect to continue to incur net losses for at least the next 12 months.

We anticipate that our expenses will increase substantially in the foreseeable future as we:

. continue to invest in research and development to enhance our ALGO and CO-Stat products and develop new technologies;

. develop additional applications for our current technology, such as the use of our CO-Stat breath analyzer for the detection of pregnancy induced hypertension;

. increase our marketing and selling activities, particularly outside the United States;

. continue to increase the size and number of locations of our customer support organization; and

. develop additional infrastructure and hire additional management and other employees to keep pace with our growth.

As a result of these increased expenses, we will need to generate significantly higher revenues to achieve profitability. We cannot be certain that we will achieve profitability in the future or, if we achieve profitability, sustain it. If we do not achieve and maintain profitability, the market price of our common stock is likely to decline, perhaps substantially.

We have relied, and expect to continue to rely, on sales of our ALGO product family for substantially all of our revenues, and a decline in sales of these products could cause our revenues to fall

Historically, we have derived substantially all of our revenues from sales of our ALGO products. Revenues from our ALGO products accounted for approximately 98% of our revenues in 1998, 1999 and the six months ended June 30, 2000. We expect that the revenues from the ALGO product family will continue to account for a substantial majority of our revenues for at least the next two years. To date, our MiniMuff product, which is disposable ear covers for newborns, has accounted for only a small percentage of our net revenues. We have not derived any significant revenues from sales of our CO-Stat products. Any factors adversely affecting the pricing of our ALGO screening equipment and related disposables or demand for our ALGO products, including physician acceptance or the selection of competing products, could cause our revenues to decline and our business to suffer.

As the ALGO and MiniMuff products are our only lines of commercially marketed products to date, if more physicians do not adopt our ALGO and MiniMuff products, we will not achieve future sales growth

The ALGO product family was commercially introduced in 1985, and our MiniMuff product was introduced in 1995. More neonatologists and pediatricians must adopt our products for us to increase our sales. We believe that physicians will not continue to use our ALGO products unless they determine, based on published peer-reviewed journal articles, long-term clinical data and experience, that the ALGO products

8

provide an accurate and cost-effective alternative to other means of testing for hearing impairment. There are currently alternative hearing screening products, which are less expensive and may be quicker on a per test basis. Physicians are traditionally slow to adopt new products and testing practices, partly because of perceived liability risks and the uncertainty of third party reimbursement. If more neonatologists and pediatricians do not adopt our ALGO products, we may never have significant revenues or achieve and maintain profitability. Factors that may affect the medical community's acceptance of our ALGO products, some of which are beyond our control, include:

. the changing governmental and physician group guidelines for screening of newborns, particularly with respect to full term babies;

. the performance, quality, price and total cost of ownership of our screening products relative to other screening products for newborns;

. our ability to maintain and enhance our existing relationships and to form new relationships with leading physician organizations, hospitals and third party payors;

. changes in state and third party payor reimbursement policies for newborn hearing screening equipment; and

. the adoption of state and foreign laws requiring universal newborn hearing screening.

Our quarterly operating results may fluctuate, which could cause our stock price to decline

Our revenues and operating results have varied significantly from quarter to quarter in the past and may continue to fluctuate in the future. The following are among the factors that could cause our operating results to fluctuate significantly from quarter to quarter:

. the budgeting cycle of our customers;

. the size and timing of specific sales, such as large purchases of screening equipment or disposables by government agencies or hospital systems, as described below;

. product and price competition;

. the timing and market acceptance of new product introductions and product enhancements by us and our competitors, such as the expected reduction in demand for our ALGO 2e Color screener prior to the announced launch date of our ALGO 3 screener;

. the length of our sales cycle;

. the loss of key sales personnel or international distributors; and

. changes caused by the rapidly evolving market for newborn screening products.

In addition, we experience seasonality in the sale of our screening equipment. For example, our sales typically decline from our fourth fiscal quarter to our first fiscal quarter. We anticipate that we will continue to experience relatively lower sales in our first fiscal quarter due to patterns in the capital budgeting and purchasing cycles of our current and prospective customers, many of which are government agencies. We may also experience declining sales in the third fiscal quarter due to summer holiday and vacation schedules. These seasonal factors may lead to fluctuations in our quarterly operating results. It is difficult for us to evaluate the degree to which the summer slow down and capital budgeting and customer purchasing cycle variations may make our revenues unpredictable in the future.

In addition, if a majority of our customers were to implement enterprise- wide evaluation programs or purchase products for the entire organization at once, our sales cycle could lengthen and our revenues could be erratic from quarter to quarter. This could make our business difficult to manage. For example, in the fourth quarter of 1997, a local government agency in Belgium made a one time purchase of equipment for each of the

9

hospitals in its jurisdiction and approximately one year's supply of disposables. This purchase resulted in an abnormally high level of sales during that period.

We do not have any historical experience selling our CO-Stat products and cannot determine how the sales cycle for the CO-Stat products will affect our revenues; however, the sales cycle could be protracted and could result in further unpredictability in our revenues from quarter to quarter.

Many of these factors are beyond our control, and we believe that you should not rely on our results of operations for interim periods as any indication of our expected results in any future period. If our revenues vary significantly from quarter to quarter, our business could be difficult to manage and our quarterly results could be below expectations of investors and stock market analysts, which could cause our stock price to decline.

Our operating results will decline if we do not succeed in developing and marketing additional newborn testing products, such as our CO-Stat product, or improving our existing products

We intend to develop additional testing products for the diagnosis and monitoring of common medical conditions in infants and pregnant women. Developing new products that meet the needs of neonatologists and pediatricians requires significant investments in research and development. If we fail to successfully develop and market new products, our operating results will decline.

We introduced our CO-Stat product family for clinical research uses in July 1999. To date, CO-Stat products have accounted for only a limited portion of our revenues, which have been derived primarily from sales to participants in our clinical trials. We have no experience marketing our CO-Stat product for commercial use. However, our future growth and profitability will depend on our ability to begin commercial sales of our CO-Stat products and to sell our CO- Stat products in volume. We cannot be certain that our entry into the hemolysis monitoring segment of the newborn testing market with CO-Stat will be successful, that the hemolysis monitoring market will develop at all or that physicians, governments or other third party payors will accept and adopt these products.

We cannot be certain that the clinical study of the cost-effectiveness of our CO-Stat product compared to other tests used for jaundice monitoring will produce results that are favorable to our products. The commercial acceptance of our CO-Stat products depends in part upon a favorable result from this study. If our CO-Stat products are not shown to be cost-effective, we may not be able to persuade clinicians to adopt our products and our results of operations may suffer.

If the studies do not produce satisfactory clinical data supported by the independent efforts of clinicians, our new products may not be accepted by physicians or government agencies as meeting the standards of care for universal newborn screening. Our safety, effectiveness, reliability, sensitivity and specificity data for the CO-Stat products is based on a study of 1,200 children. We may find that data from longer-term follow-up studies or studies involving a larger number of children is inconsistent with our relatively short-term data. If longer-term studies or clinical experience indicate that the CO-Stat products do not provide sensitive, specific and reliable results, our products may not gain commercial acceptance and our revenues could decline. In addition, we could be subject to significant liability for screening that failed to detect hemolysis leading to jaundice or costs and emotional distress incurred by families whose children received results indicating jaundice when none existed. We could have similar problems with any other products we offer in the future.

If the guidelines for recommended universal newborn screening do not continue to develop in the United States and foreign countries, and governments do not require testing of all newborns as we anticipate, our revenues may not grow because our products will not be needed for universal newborn screening

The demand for our screening products depends, in part, on the state and foreign governments' adoption of universal screening requirements for the disorders for which our products screen. The guidelines for universal newborn screening for hearing impairment and jaundice monitoring have been adopted by some

10

physician groups and governments only recently. We cannot predict the outcome or the impact that statutes and government regulations requiring universal newborn screening will have on our sales. The widespread adoption of these guidelines will depend on, among other things, our ability to:

. educate government agencies, neonatologists, pediatricians, third party payors and hospital administrators about the benefits of universal newborn hearing testing and the benefits of universal newborn hemolysis monitoring, as well as the use of our products to perform the screenings;

. establish and maintain relationships with leading physician groups, government agencies and other third party payors and maintain and enhance our relationships with our customers; and

. design our products to meet or exceed recommended guidelines for universal newborn screening.

If the governments in the most densely populated states and foreign countries do not require universal screening for the disorders for which our products test, our business would be harmed and our sales may not grow. As of June 30, 2000, 31 states have mandated universal newborn hearing screening, but the phase-in of these guidelines varies widely from six months to four years. To date, there has been only limited adoption of newborn hearing screening prior to hospital discharge by foreign governments. Our revenues may not grow if hospitals are slow to comply with these guidelines or the government provides for a lengthy phase-in period for compliance.

To date, physician groups and federal, state and local governments have not mandated the screening methodology to be used for newborn jaundice management or established monitoring of hemolysis as the best practice. If these mandates or practice recommendations are not issued, a market may not develop for our CO-Stat products.

Any failure in our efforts to educate clinician, government and other third party payors could significantly reduce our product sales

It is critical to the success of our sales effort that we educate a sufficient number of clinicians, hospital administrators and government agencies about our products and the costs and benefits of universal newborn hearing testing and universal newborn jaundice management using hemolysis monitoring. We rely on physician, government agency and other third party payor confidence in the benefits of testing with our products as well as their comfort with the reliability, sensitivity and specificity of our products. The impact of our products will not be demonstrable unless highly sensitive and specific evaluations are performed on a substantial number of newborns, including those who do not have risk factors for hearing impairment or who do not display signs of jaundice. If we fail to demonstrate the effectiveness of our products and the potential long-term benefits to patients and third party payors of universal newborn screening, our products will not be adopted.

We depend on our relationships with leading neonatology and pediatric physician groups and government agencies, and if these relationships suffer, we may have difficulty introducing and selling our products and our revenues would decline

We believe that our success depends in part on our ability to maintain or further develop our relationships with leading neonatology and pediatric physician groups, such as the American Academy of Pediatrics, as well as state health care agencies. We believe our relationships with these constituencies are important for market acceptance of our products. If we are unable to maintain and enhance our existing relationships with these physician groups and government agencies or develop similar relationships with other major physician groups or third party payors, we may have difficulty selling our products.

If health care providers are not adequately reimbursed for the screening procedures or for screening equipment itself, we may never achieve significant revenues

Physicians, hospitals and state agencies are unlikely to purchase our products if clinicians are not adequately reimbursed for the screening procedures conducted with our equipment or the disposable products

11

needed to conduct the screenings. Unless a sufficient amount of positive, peer- reviewed clinical data about our products has been published, third party payors, including insurance companies and government agencies, may refuse to provide reimbursement for the cost of newborn hearing screening and hemolysis monitoring with our products. Furthermore even if reimbursement is provided, it may not be adequate to fully compensate the clinicians or hospitals. Some third party payors may refuse adequate reimbursement for screening unless the infant has demonstrable risk factors. See "Business--Third Party Reimbursement" for a further discussion of reimbursement. If health care providers cannot obtain sufficient reimbursement from third party payors for our products or the screenings conducted with our products, it is unlikely that our products will ever achieve significant market acceptance.

Even if third party payors provide adequate reimbursement for some newborn hearing screening or hemolysis monitoring for jaundice management, adverse changes in reimbursement policies in general could harm our business

We are unable to predict changes in the reimbursement methods used by third party health care payors. For example, some payors are moving toward a managed care system in which providers contract to provide comprehensive health care for a fixed cost per person. We cannot assure you that in a managed care system the cost of our products will be incorporated into the overall payment for childbirth and newborn care or that there will be adequate reimbursement for our screening equipment and disposable products separate from reimbursement for the procedure. Unless the cost of screening is reimbursed as a standard component of the newborn's care, universal screening is unlikely to occur and the number of infants likely to be screened with our products will be substantially reduced.

We have very limited experience selling and marketing products other than our ALGO products, and our failure to build and manage our sales force or to market and distribute our CO-Stat products or other products effectively will hurt our revenues and quarterly results

Since we have not yet actively marketed our CO-Stat products, our sales force has little experience selling these products, and we cannot predict how successful they will be in selling these products. In order to successfully introduce and build market share for our CO-Stat products, we must sell our products to hospital administrators accustomed to the use of laboratory bench equipment rather than portable point of care screening devices for jaundice management.

We market almost all of our newborn hearing screening products in the United States through a small direct sales force of 14 persons. We must expand our sales team over the next two years in order to market our CO-Stat products along with our other products. There are significant risks involved in building and managing our sales force and marketing our products. We may be unable to hire a sufficient number of qualified sales people with the skills and training to sell our newborn hearing screening and jaundice management products effectively. Furthermore, we do not have any agreements with distributors or group purchasing organizations for sales of our CO-Stat products.

We may not be successful in generating revenues from our CO-Stat products because we may encounter difficulties in manufacturing our CO-Stat products in commercial quantities

We do not have experience manufacturing our CO-Stat products in commercial quantities, and we may encounter difficulties in the manufacturing of these products due to the following factors:

. our lack of extensive experience manufacturing our CO-Stat products in compliance with the FDA's regulations that govern manufacturing of medical devices;

. the need to enhance our manufacturing operations to increase our capacity or enter into agreements with contract manufacturers to produce the CO- Stat products for us; and

. the difficulty in attracting and retaining qualified employees, who are in short supply, for our assembly and testing operations.

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If we encounter any of these difficulties, we may not be successful in marketing our CO-Stat products, and our revenues and financial condition may be harmed.

If we lose our relationship with any supplier of key product components, our relationship with a supplier deteriorates or key components are not available in sufficient quantities, our manufacturing could be delayed and our business could suffer

We contract with third parties for the supply of some of the components used in our products and the production of our disposable products. Some of our suppliers are not obligated to continue to supply us. For certain of these materials and components, relatively few alternative sources of supply exist. In addition, the lead time involved in the manufacturing of some of these components can be lengthy. If these suppliers become unwilling or unable to supply us with our requirements, it might be difficult to establish additional or replacement suppliers in a timely manner or at all. This would cause our product sales to be disrupted and our revenues and operating results to suffer.

Replacement or alternative sources might not be readily obtainable due to regulatory requirements and other factors applicable to our manufacturing operations. Incorporation of components from a new supplier into our products may require a new or supplemental filing with applicable regulatory authorities and clearance or approval of the filing before we could resume product sales. This process may take a substantial period of time, and we cannot assure you that we would be able to obtain the necessary regulatory clearance or approval. This could create supply disruptions that would harm our product sales and operating results.

There is only one supplier that provides hydrogel, the adhesive used in our disposable products. In addition, we have relied on a single supplier for the electrochemical sensors used in our CO-Stat analyzer and we have not qualified another vendor for this component. A disruption in the supply of the adhesive or electrochemical sensors could negatively affect our revenues. If we or our contract manufacturers were unable to locate another supplier, it could significantly impair our ability to sell our products. In addition, we may be required to make new or supplemental filings with applicable regulatory authorities prior to our marketing a product containing new materials or produced in a new facility. If we fail to obtain regulatory approval to use a new material, we may not be able to continue to sell the affected products.

Our sales efforts through group purchasing organizations may conflict with our direct sales efforts to our existing customers, which would reduce our revenues and gross profits from these sales

Recently, we entered into two agreements to sell our products through group purchasing organizations, which negotiate volume purchase prices for medical devices and supplies for member hospitals, group practices and other clinics. Sales to members of one group purchasing organization, Novation, Inc., accounted for approximately 20.6% of our total revenues in the six months ended June 30, 2000. These group purchasing organizations receive volume discounts off our direct selling price and other special pricing considerations from us. Many of our existing customers are members of group purchasing organizations, including those with which we have agreements. Our sales efforts through group purchasing organizations may conflict with our direct sales efforts to our existing customers. If our existing customers begin purchasing our products through group purchasing organizations, our revenues and profit margin could decline.

We rely on sales to existing customers for a substantial portion of our revenues, and if our existing customers do not continue to purchase products from us, our revenues may decline

We rely on sales of additional screening equipment to our existing customers for a substantial portion of our revenues. If we fail to sell additional screening equipment to our existing customers directly or indirectly, we would experience a material decline in revenues.

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Because we rely on distributors to sell our products outside of the United States, our revenues could decline if our existing distributors do not continue to purchase products from us or if our relationships with any of these distributors is terminated

We rely on distributors, such as Nippon Eurotec, our Japanese distributor, for a majority of our sales outside the United States. These distributors also assist us with regulatory approvals and education of physicians and government agencies. Our revenues outside the United States represented approximately 10% of our net revenues in 1999 and approximately 14% of our net revenues in the six months ended June 30, 2000. We intend to continue our efforts to increase our sales in Europe, Japan and other countries with a relatively high level of health care spending on infants. If we fail to sell our products through our existing international distributors, we would experience a decline in revenues. We cannot be certain that we will be able to attract new international distributors that market our products effectively or provide timely and cost- effective customer support and service. Even if we are successful in selling our products through new distributors, the rate of growth of our revenues could be harmed if our existing distributors do not continue to sell a large dollar volume of our products. None of our existing distributors are obligated to continue selling our products.

In the past, we have terminated our relationships with distributors for poor performance. We are also subject to foreign laws governing our relationships with our distributors. These laws may require us to make payments to our distributors even if we terminate our relationship for cause. Some countries require termination payments under common law or legislation that may supercede our contractual relationship with the distributor. Any required payments would adversely affect our operating results.

Our plan to expand in international markets will result in increased costs and may not be successful, which could harm our business

We must expand the number of distributors who sell our products or increase our direct international sales presence to significantly penetrate international markets. We have only recently begun to develop a direct sales force outside the United States. As we continue to increase our direct international sales presence, we will incur higher personnel costs that may not result in additional revenues. A higher percentage of our sales to international distributors could also impair our revenues due to discounts available to these distributors. We may not realize corresponding growth in operating results from growth in international sales, due to the higher costs of sales outside of the United States. Even if we are able to successfully expand our direct and indirect international selling efforts, we cannot be certain that we will be able to create or increase demand for our products outside of the United States.

Acceptance of our products in international markets will be dependent upon the availability of adequate reimbursement within prevailing health care payment systems. Reimbursement and health care payment systems vary significantly by country and include both government-sponsored health care and private insurance. Although we intend to seek international reimbursement approvals, we may not obtain these approvals in a timely manner or at all.

Although our sales contracts provide for payment in United States dollars, we expect that we will incur expenses related to international sales denominated in the respective local currency. We also expect to begin selling our products in local currencies as we expand our direct international sales. To date, we have not undertaken any foreign currency hedging transactions, and as a result, our future revenues and expense levels from international operations may be unpredictable due to exchange rate fluctuations. Furthermore, a strengthening of the dollar could make our products less competitive in foreign markets. Our international operations are subject to other risks, which include:

. contractual provisions governed by foreign law, such as common law rights to sales commissions by terminated distributors;

. the dependence of demand for our products on health care spending by local governments;

. greater difficulty in accounts receivable collection and longer collection periods;

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. difficulties of staffing and managing foreign operations;

. difficulties in obtaining reimbursement for procedures using medical devices in some foreign markets;

. reduced protection for intellectual property rights in some countries and potentially conflicting intellectual property rights of third parties under the laws of various foreign jurisdictions;

. potentially adverse tax consequences, including the impact of expiration of favorable short-term tax rates; and

. difficulty in obtaining foreign regulatory approvals.

Our failure to obtain necessary FDA clearances or approvals or to comply with FDA regulations could hurt our ability to commercially distribute and market our products in the United States, and this would harm our business and financial condition

Unless an exemption applies, each medical device that we wish to market in the United States must first receive one of the following types of FDA premarket review authorizations:

. 510(k) clearance via Section 510(k) of the federal Food, Drug, and Cosmetics Act of 1938, as amended; or

. premarket approval via Section 515 of the Food, Drug, and Cosmetics Act if the FDA has determined that the medical device in question poses a greater risk of injury.

The FDA's 510(k) clearance process usually takes from four to 12 months, but can take longer. The process of obtaining premarket approval is much more costly, lengthy and uncertain. Premarket approval generally takes from one to three years, but can take even longer.

We have obtained 510(k) clearances for the uses of the ALGO products in newborn hearing testing, the MiniMuff product for newborn noise diminution and the CO-Stat products for newborn hemolysis monitoring. We may need to obtain additional 510(k) clearance to expand the market for our CO-Stat products for use in new applications. Furthermore, if the FDA concludes that these future products using our technology do not meet the requirements to obtain 510(k) clearance, then we would have to seek premarket approval. We cannot assure you that the FDA will not impose the more burdensome premarket approval requirement on modifications to our existing products or future products, which in either case could be costly and cause us to divert our attention and resources from the development of new products or the enhancement of existing products. In addition, we cannot assure you that the FDA will ever grant either 510(k) clearance or premarket approval for any product we propose to market.

We may not promote or advertise the ALGO, MiniMuff or CO-Stat products, or any future cleared or approved devices, for uses not within the scope of our clearances or approvals or make unsupported promotional claims about the benefits of our products. If the FDA requires us to revise our promotional claims or takes enforcement action against us based upon our labeling and promotional materials, our sales could be delayed, our revenues could decline and our reputation among clinicians could be harmed.

The FDA may require us to obtain a new 510(k) clearance or premarket approval if we make any modification to a 510(k) cleared device that significantly affects its safety or effectiveness. We have modified aspects of our ALGO products, but we believe that these modifications do not require new 510(k) clearances. We cannot assure you that the FDA would agree with any of our decisions not to seek new clearances. In the future, we may modify our products after they have received clearance or approval, and, in appropriate circumstances, we may determine that new clearances or approvals are unnecessary. If the FDA requires us to seek 510(k) clearance or a premarket approval for any modification to a previously cleared product, we may be required to cease marketing or recall the modified device until we obtain the new clearance or approval, which would disrupt our revenues and harm our business.

We are also subject to inspection and market surveillance by the FDA concerning compliance with pertinent regulatory requirements. If the FDA finds that we have failed to comply with these requirements, the

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agency can institute a wide variety of enforcement actions, ranging from a public warning letter to more severe sanctions such as:

. fines, injunctions and civil penalties;

. the recall or seizure of our products;

. the issuance of public notices or warnings;

. the imposition of operating restrictions, partial suspension or total shutdown of production;

. the refusal of our requests for 510(k) clearance or premarket approval of new products;

. the withdrawal of 510(k) clearance or premarket approvals already granted; and

. criminal prosecution.

The FDA also has the authority to require repair, replacement or refund of the cost of any medical device manufactured or distributed by us. Our failure to comply with applicable requirements could lead to an enforcement action that may have an adverse effect on our financial condition and results of operations.

If we fail to obtain necessary foreign regulatory approvals in order to market and sell our products outside of the United States, we may not be able to sell our products in other countries

Our products are regulated outside the United States as medical devices by foreign governmental agencies similar to the FDA and are subject to regulatory requirements similar to the FDA's in foreign countries. We are currently subject to regulations governing the sales of our ALGO products in Australia, Europe, Japan and New Zealand. We plan to seek approval to sell our products in additional countries. The time and cost required to obtain market authorization from other countries and the requirements for licensing a product in another country may differ significantly from FDA requirements. We may not be able to obtain these approvals without incurring significant expenses or at all.

If we or our suppliers fail to comply with applicable regulations, sales of our products could be delayed and our revenues could be harmed

Every manufacturer of a finished medical device, including us and some of our contract manufacturers and suppliers, are required to demonstrate and maintain compliance with the FDA's quality system regulation. This regulation incorporates the requirements of the FDA's current good manufacturing practices and covers product design, testing and manufacturing quality assurance, and requires the maintenance of accurate records and documentation. The FDA enforces the quality system regulation through periodic unannounced inspections. Although we have passed inspections in the past, we cannot assure you that we or our contract manufacturers will pass any future quality system regulation inspections. If we or our contract manufacturers fail one of these inspections in the future, our operations could be disrupted and our manufacturing and sales delayed significantly until we can demonstrate adequate compliance. If we or our contract manufacturers fail to take adequate corrective action in a timely fashion in response to a quality system regulations inspection, the FDA could shut down our or our contract manufacturers' manufacturing operations and require us, among other things, to recall our products, either of which would harm our business. We cannot assure you that we or our key component suppliers and contract manufacturers are or will continue to be in compliance with applicable regulatory requirements or will not encounter any manufacturing difficulties. If these suppliers fall out of compliance or experience manufacturing difficulties, our ability to manufacture and sell our products would be harmed.

We may experience intense competition from other medical device companies, and this competition could adversely affect our revenues and our business

Our most significant current and potential competitors for the ALGO products include companies that market hearing screening equipment. For the CO-Stat products, we anticipate that our competitors will be large medical

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device companies that market laboratory bench equipment used for blood-based antibody and bilirubin tests and companies that sell devices that analyze the amount of yellow in the skin to estimate the level of bilirubin.

In addition, large medical testing equipment vendors, such as Johnson & Johnson or F. Hoffmann-La Roche Ltd, may also acquire or establish cooperative relationships with our current competitors. We expect that the medical testing equipment industry will continue to consolidate. New competitors or alliances among competitors may emerge and rapidly acquire significant market share, which would harm our business and financial prospects.

Our competitors may have greater financial resources and name recognition or larger, more established distribution channels than we do. We believe that Bio- Logic Systems Corp., Intelligent Hearing Systems and Sonamed Corp., each of which is also currently marketing enhanced auditory brainstem response and otoacoustic hearing screening equipment products, could also introduce new, lower priced hearing screening equipment similar to our products. Similarly, we believe that Chromatics Color Sciences International, Inc., Minolta Co., Ltd. or SpectRx, Inc., each of which is currently marketing skin color analysis products for bilirubin monitoring, or Johnson & Johnson or Roche, each of which is currently marketing equipment for blood-based bilirubin or antibody tests, could also introduce new, lower-priced screening equipment similar to our CO- Stat products.

In addition, other medical device companies may decide to bundle their products with other newborn hearing screening or hemolysis monitoring products and sell the bundle at lower prices. If this happens, our business and future operating results could suffer if we were no longer able to offer commercially viable or competitive products.

We believe our future success depends on our ability to enhance existing products, develop and introduce new products, satisfy customer requirements and achieve market acceptance. We cannot be certain that we will successfully identify new product opportunities. We may not be able to develop and bring new products to market before our competitors or in a more cost-effective manner. Increased competition may negatively affect our business and future operating results by leading to price reductions, higher selling expenses or a reduction in our market share.

We may not be able to preserve the value of our products' intellectual property because we may not be able to protect access to our intellectual property

If we fail to protect our intellectual property rights or if our intellectual property rights do not adequately cover the technology we employ, other medical device companies could sell hearing screening or hemolysis monitoring products with features similar to ours, and this could reduce demand for our products. We protect our intellectual property through a combination of patent, copyright, trade secret and trademark laws. We have eight issued United States patents, five patent applications pending before the United States Patent and Trademark Office and seven patent applications pending before foreign governmental bodies of which one European Patent Office application has been allowed and will be registered in nine European countries. We enter into confidentiality or license agreements with our employees, consultants and corporate partners and seek to control access to our intellectual property and the distribution of our hearing screening or hemolysis monitoring products, documentation and other proprietary information. However, we believe that these measures afford only limited protection. Others may develop technologies that are similar or superior to our technology or design around the patents, copyrights and trade secrets we own. The patent we licensed from a third party for the technology upon which we have developed our automated ABR technology has expired, and our rights to commercialize this technology are not exclusive.

Despite our efforts to protect our proprietary rights, others may attempt to copy or otherwise improperly obtain and use our products or technology. Policing unauthorized use of our products is difficult and expensive, and we cannot be certain that the steps we have taken will prevent misappropriation of our technology, particularly in foreign countries where the laws may not protect our proprietary rights as fully. Our means of protecting our proprietary rights may be inadequate. Enforcing our intellectual property rights could be costly and time consuming and may divert our management's attention and resources. Enforcing our intellectual property rights could also result in the loss of our intellectual property rights.

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Our operating results would suffer if we were subject to a protracted infringement claim or a significant damage award

Substantial intellectual property litigation and threats of litigation exist in our industry. We expect that medical screening equipment may become increasingly subject to third party infringement claims as the number of competitors in our industry segment grows and the functionality of products in different industry segments overlaps. Third parties such as individuals, educational institutions or other medical device companies may claim that we infringe their intellectual property rights. Any claims, with or without merit, could have any of the following negative consequences:

. result in costly litigation and damage awards;

. divert our management's attention and resources;

. cause product shipment delays or suspensions; or

. require us to seek to enter into royalty or licensing agreements, which may not be available on terms acceptable to us, if at all.

A successful claim of infringement against us could result in a substantial damage award and materially harm our financial condition. Our failure or inability to license the infringed or similar technology could prevent us from selling our products and adversely affect our business and financial results.

Product liability suits against us could result in expensive and time consuming litigation, payment of substantial damages and an increase in our insurance rates

The sale and use of our medical testing products could lead to the filing of a product liability claim if someone were to be injured using one of our devices or if one of our devices fails to detect a disorder for which it was being used to screen. A product liability claim could result in substantial damages and be costly and time consuming to defend, either of which could materially harm our business or financial condition. We cannot assure you that our product liability insurance would protect our assets from the financial impact of defending a product liability claim. Any product liability claim brought against us, with or without merit, could increase our product liability insurance rates or prevent us from securing any coverage in the future.

We may incur significant costs related to a class action lawsuit due to the likely volatility of the public market price of our stock

When our common stock is publicly traded, our stock price may fluctuate for a number of reasons including:

. quarterly fluctuations in our results of operations;

. our ability to successfully commercialize our products;

. announcements of technological or competitive developments by us or our competitors;

. announcements regarding patent litigation or the issuance of patents to us or our competitors;

. announcements regarding state screening mandates or third party payor reimbursement policies;

. regulatory developments regarding us or our competitors;

. acquisitions or strategic alliances by us or our competitors;

. changes in estimates of our financial performance or changes in recommendations by securities analysts; and

. general market conditions, particularly for companies with a relatively small number of shares available for sale in the public market.

Securities class action litigation is often brought against a company after a period of volatility in the market price of its stock. If our future quarterly operating results are below the expectations of securities analysts or investors, the price of our common stock would likely decline. Stock price fluctuations may be exaggerated if the trading volume of our common stock is low. Any securities litigation claims brought against us could result in substantial expense and damage awards and divert our management's attention from running our business.

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We depend upon key employees in a competitive market for skilled personnel, and, without additional employees, we cannot grow or achieve and maintain profitability

Our products and technologies are complex, and we depend substantially on the continued service of our senior management team including Tim C. Johnson, our chief executive officer, William New, Jr., M.D., Ph.D., our chief technology officer, chairman and a founder, Bryan Flaherty, Ph.D., our vice president of research and development and Lucille Ferus, our vice president of engineering. The loss of any of our key employees could adversely affect our business and slow our product development process. Although we maintain key person life insurance on Dr. New, we do not maintain key person life insurance on any of our other employees, and the amount of the policy on Dr. New may be inadequate to compensate us for his loss.

Our future success also will depend in part on the continued service of our key management personnel, software engineers and other research and development employees and our ability to identify, hire, and retain additional personnel, including customer service, marketing and sales staff. Hiring sales, marketing and customer service personnel in our industry is very competitive due to the limited number of people available with the necessary technical skills and understanding of pediatric audiology and neonatal jaundice management. We may be unable to attract and retain personnel necessary for the development of our business. Moreover, our business is located in the San Francisco Bay area of California, where demand for personnel with the skills we seek is extremely high and is likely to remain high. Because of this competition, our compensation costs may increase significantly.

We could lose the ability to use net operating losses, which may adversely affect our financial results

As of December 31, 1999, we had total net operating loss carryforwards of approximately $8.4 million for income tax purposes. These net operating loss carryforwards, if not utilized to offset taxable income in future periods, will expire in various amounts beginning in 2002 through 2012. If we continue to have net losses, we may not be able to utilize some or all of our net operating loss carryforwards before they expire.

In addition, applicable United States income tax law imposes limitations on the ability of corporations to use net operating loss carryforwards if the corporation experiences a more than 50% change in ownership during any three- year period. We cannot assure you that we will not take actions, such as the issuance of additional stock, that would cause an ownership change to occur. Accordingly, we may be limited to the amount we can use in any given year, so even if we have substantial net income, we may not be able to use our net operating loss carryforwards before they expire. In addition, the net operating loss carryforwards are subject to examination by the Internal Revenue Service, or IRS, and are thus subject to adjustment or disallowance resulting from any such IRS examination.

If we are unable to use our net operating loss carryforwards to offset our taxable income, our future tax payments will be higher and our financial results may suffer.

We have broad discretion in how we use the net proceeds of this offering, and we may not use these proceeds effectively

Our management could spend most of the net proceeds from this offering in ways that our stockholders may not desire or that do not yield a favorable return. You will not have the opportunity, as part of your investment in our common stock, to assess whether the net proceeds of this offering will be used appropriately. The failure of our management to apply the net proceeds of this offering effectively could have a material adverse effect on our business, financial condition and results of operations.

Our executive officers, directors and their affiliates hold a substantial portion of our stock and could exercise significant influence over matters requiring stockholder approval, regardless of the wishes of other stockholders

Our executive officers, directors and individuals or entities affiliated with them will beneficially own approximately % of our outstanding common stock as a group immediately after this offering. Acting

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together, these stockholders would be able to significantly influence all matters that our stockholders vote upon, including the election of directors and determination of significant corporate actions. This concentration of ownership could delay or prevent a change of control transaction that could otherwise be beneficial to our stockholders.

We may need to raise additional capital in the future, which could result in dilution to our stockholders and adversely affect our operations

While we believe the proceeds from this offering will provide us with adequate capital to fund operations for at least the next 18 months, we may need to raise additional funds prior to that time. We may seek to sell additional equity or debt securities or to obtain an additional credit facility, which we may not be able to do on favorable terms, or at all. The sale of additional equity or convertible debt securities could result in additional dilution to our stockholders. If additional funds are raised through the issuance of debt securities or preferred stock, these securities could have rights that are senior to holders of common stock and any debt securities could contain covenants that would restrict our operations.

Our charter documents and Delaware law contain provisions that may inhibit potential acquisition bids, which may adversely affect the market price of our common stock, discourage merger offers and prevent changes in our management

Section 203 of the Delaware General Corporation Law may inhibit potential acquisition bids for our company. Upon completion of this offering, we will be subject to Section 203, which regulates corporate acquisitions and limits the ability of a holder of 15% or more of our stock from acquiring the rest of our stock for three years. Under Delaware law, a corporation may opt our of the antitakeover provisions. We do not intend to opt out of the antitakeover provisions of Delaware Law.

Upon the closing of this offering, our board of directors will have the authority to issue up to 10 million shares of preferred stock. Our board of directors can fix the price, rights, preferences and privileges of the preferred stock without any further vote or action by our stockholders. These rights, preferences and privileges may be senior to those of the holders of our common stock. We have no current plans to issue any shares of preferred stock. We have also adopted other provisions in our charter documents effective upon the closing of this offering that could delay or prevent a change in control. The consent of two-thirds of our stockholders is required to amend our certificate of incorporation, and our stockholders cannot act by written consent. Only stockholders entitled to vote at least 30% of the shares eligible to vote may call a special meeting. Each member of our board of directors will serve for a three year term and will only stand for election once every three years. These provisions could discourage potential acquisition proposals and could delay or prevent a change in control transaction.

A large number of shares, 9,684,520, or % of our total outstanding common stock, may be sold into the market in the near future, which could cause the market price of our common stock to drop significantly

Our current stockholders hold a substantial number of shares, which they will be able to sell in the public market in the near future. Sales of a substantial number of shares of our common stock could cause our stock price to fall. In addition, the sale of these shares could impair our ability to raise capital through the sale of additional stock.

Immediately after the closing of this offering, we will have outstanding shares of common stock. This includes shares that we are selling in this offering, which may be resold immediately in the public market. The remaining 9,684,520 shares will become eligible for resale in the public market 180 days after the date of the final prospectus pursuant to agreements our stockholders have with us and the underwriters. However, Salomon Smith Barney Inc. can waive this restriction and allow these stockholders to sell their shares at any time. Of these shares, 6,103,902 shares will be subject to volume limitations under the federal securities laws.

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INFORMATION REGARDING FORWARD-LOOKING STATEMENTS

This prospectus contains forward-looking statements. The forward-looking statements are contained principally in the sections entitled "Prospectus Summary," "Management's Discussion and Analysis of Financial Condition and Results of Operations" and "Business." These statements involve known and unknown risks, uncertainties and other factors which may cause our actual results, performance or achievements to be materially different from any future results, performance or achievements expressed or implied by the forward- looking statements. Forward-looking statements include, but are not limited to, statements about:

. the capabilities, development and marketing of our products;

. the benefits of universal newborn screening and, in particular, our technology and methods;

. the development of voluntary and governmentally mandated universal newborn hearing and jaundice management screening programs;

. third party payor reimbursement for our products and the tests conducted with them;

. our plans for future products and for enhancements of our existing products;

. our patent applications and proposed patents;

. our ability to attract customers; and

. our sources of revenues and anticipated revenues, including the development and commercialization of our products.

In some cases, you can identify forward-looking statements by terms such as "may," "will," "should," "could," "would," "expects," "plans," "anticipates," "believes," "estimates," "projects," "predicts," "potential" and similar expressions intended to identify forward-looking statements. These statements reflect our current views with respect to future events and are based on assumptions and subject to risks and uncertainties. Given these uncertainties, you should not place undue reliance on these forward-looking statements. We discuss many of these risks in this prospectus in greater detail under the heading "Risk Factors." Also, these forward-looking statements represent our estimates and assumptions only as of the date of this prospectus.

This prospectus contains statistical data regarding medical conditions and medical products that we obtained from private and public industry publications. These publications generally indicate that they have obtained their information from sources believed to be reliable, but do not guarantee the accuracy and completeness of their information. Although we believe that the publications are reliable, we have not independently verified their data.

You should read this prospectus and the documents that we reference in this prospectus completely and with the understanding that our actual future results may be materially different from what we expect. We qualify all of our forward- looking statements by these cautionary statements.

You should rely only on the information contained in this prospectus. We have not authorized anyone to provide you with different information. We are not making an offer of these securities in any state where the offer is not permitted. You should not assume that the information provided by this prospectus is accurate as of any date other than the date on the front of this prospectus.

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USE OF PROCEEDS

We expect that we will receive net proceeds of approximately $ million from the sale of the shares of common stock we are offering, based on an assumed initial public offering price of $ per share and after deducting estimated underwriting discounts and commissions and estimated offering expenses payable by us. If the underwriters exercise their over-allotment option in full, we will receive net proceeds of approximately $ million. We currently intend to use the net proceeds of this offering as follows:

. to fund international expansion;

. to increase our working capital;

. to fund our capital expenditures; and

. for general corporate purposes.

In addition, we also may use a portion of the net proceeds of this offering for the acquisition of complementary businesses, products or technologies. While we evaluate these types of opportunities from time to time, there are currently no agreements or negotiations with respect to any specific transaction.

We have not yet determined all of our expected expenditures, and we cannot estimate the amounts to be used for each purpose set forth above. Accordingly, our management will have significant flexibility in applying the net proceeds of this offering. Pending use of the net proceeds as described above, we intend to invest the net proceeds of this offering in short-term, interest-bearing, investment-grade securities.

OUR POLICY REGARDING DIVIDENDS

We have never declared or paid any cash dividends on our capital stock and we do not currently intend to pay any cash dividends on our common stock in the foreseeable future. We expect to retain future earnings, if any, to fund the development and growth of our business. In addition, our bank line of credit generally prohibits us from paying cash dividends.

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CAPITALIZATION

You should read this table together with "Management's Discussion and Analysis of Financial Condition and Results of Operations" and our financial statements and the related notes included elsewhere in this prospectus. The following table describes our capitalization as of June 30, 2000:

. on an actual basis;

. on a pro forma basis after giving effect to the conversion of all outstanding shares of convertible preferred stock into 8,931,534 shares of common stock concurrently with the completion of this offering; and

. on a pro forma as adjusted basis to reflect the conversion of all outstanding shares of convertible preferred stock into 8,931,534 shares of common stock and the sale of shares of common stock offered by us at an assumed initial public offering price of $ per share, after deducting the estimated underwriting discounts and commissions and estimated offering expenses.

                                                         June 30, 2000
                                                 --------------------------------
                                                                       Pro Forma
                                                  Actual   Pro Forma  As Adjusted
                                                 --------  ---------  -----------
                                                  (in thousands, except share
                                                     and per share amounts)
Long-term debt, net of current portion.........  $    --   $    --     $    --
                                                 --------  --------    --------
Convertible preferred stock:
 Series A convertible preferred stock, $0.001
   par value; 1,241,842 shares authorized,
   1,241,841 shares issued and outstanding,
   actual; no shares authorized, issued or
   outstanding, pro forma and pro forma as
   adjusted; aggregate liquidation value of
   $3,716......................................     2,227       --          --
 Redeemable convertible preferred stock, $0.001
   par value; 8,781,412 shares authorized;
   outstanding shares: aggregate liquidation
   value of $24,486 and aggregate redemption
   value of $22,307:
  Series B: 3,967,126 shares authorized;
   3,967,120 shares issued and outstanding,
   actual; no shares authorized, issued or
   outstanding, pro forma and pro forma as
   adjusted....................................    12,121       --          --
  Series C: 3,214,286 shares authorized;
   2,490,181 shares issued and outstanding,
   actual; no shares authorized, issued or
   outstanding, pro forma and pro forma as
   adjusted....................................     5,640       --          --
  Series D: 1,600,000 shares authorized;
   1,232,392 shares issued and outstanding,
   actual; no shares authorized, issued or
   outstanding, pro forma and pro forma as
   adjusted....................................     4,546       --          --
                                                 --------  --------    --------
  Total convertible preferred stock............    24,534       --          --
Stockholders' equity (deficit):
 Preferred stock, $0.001 par value; no shares
  authorized, issued or outstanding, actual and
  pro forma; 10,000,000 shares authorized, no
  shares issued or outstanding, pro forma as
  adjusted.....................................       --        --          --
 Common stock, $0.001 par value; 120,000,000
  shares authorized, actual, pro forma and pro
  forma as adjusted; 752,986 shares issued and
  outstanding, actual; 9,684,520 shares issued
  and outstanding, pro forma;           shares
  issued and outstanding, pro forma as
  adjusted.....................................     1,824    26,358
 Deferred stock compensation...................    (1,122)   (1,122)     (1,122)
 Accumulated deficit...........................   (19,513)  (19,513)    (19,513)
                                                 --------  --------    --------
  Total stockholders' equity (deficit).........   (18,811)    5,723
                                                 --------  --------    --------
   Total capitalization........................  $  5,723  $  5,723    $
                                                 ========  ========    ========

The actual, pro forma and pro forma as adjusted information set forth in the table excludes:

. shares of common stock issuable upon the exercise of the underwriters' over-allotment option;

. 1,326,123 shares of common stock issuable upon the exercise of stock options outstanding as of June 30, 2000 at a weighted average exercise price of $1.09 per share; and

. 2,900,000 shares of common stock reserved for future issuance under our 2000 stock option plan, 2000 employee stock purchase plan and 2000 director option plan as of June 30, 2000.

23

DILUTION

Our pro forma net tangible book value as of June 30, 2000 was approximately $5.7 million, or $0.58 per share of common stock. Pro forma net tangible book value per share represents the amount of our total assets less total liabilities and intangible assets, divided by the number of shares of common stock outstanding, assuming the conversion of all shares of convertible preferred stock outstanding as of June 30, 2000 into 8,931,534 shares of common stock concurrently with the completion of this offering. Pro forma net tangible book value dilution per share represents the difference between the amount per share paid by purchasers of shares of common stock in this offering and the pro forma net tangible book value per share of common stock immediately after the completion of this offering on a pro forma as adjusted basis. After giving effect to the sale of the shares of common stock by us at an assumed initial public offering price of $ per share, and after deducting the estimated underwriting discounts and commissions and estimated offering expenses payable by us, our pro forma net tangible book value as of June 30, 2000 would have been approximately $ million or $ per share of common stock. This represents an immediate increase in pro forma net tangible book value of $ per share of common stock to existing common stockholders and an immediate dilution in net tangible book value of $ per share to new investors of common stock in this offering. The following table illustrates this per share dilution:

Assumed initial public offering price per share.................       $
  Pro forma net tangible book value per share before this
   offering..................................................... $0.58
  Increase in pro forma net tangible book value per share
   attributable to this offering................................
                                                                 -----
Pro forma net tangible book value per share after this
 offering.......................................................
                                                                       ----
Dilution per share to new investors.............................       $
                                                                       ====

The following table summarizes, on a pro forma basis as of June 30, 2000, the number of shares of common stock purchased from us, the total consideration paid and the average price per share paid by existing and new investors purchasing shares of common stock in this offering, before deducting estimated underwriting discounts and commissions and estimated offering expenses. The pro forma basis gives effect to the conversion of all shares of convertible preferred stock outstanding as of June 30, 2000 into 8,931,534 shares of common stock concurrently with the completion of this offering.

                                Shares Purchased  Total Consideration
                                ----------------- -------------------- Average Price
                                 Number   Percent    Amount    Percent   Per Share
                                --------- ------- ------------ ------- -------------
Existing stockholders.........  9,684,520       % $ 17,676,815       %    $ 1.83
New investors.................
                                ---------  -----  ------------  -----     ------
  Total.....................               100.0% $             100.0%
                                =========  =====  ============  =====     ======

The tables and calculations above assume no exercise of the underwriters' over-allotment option to purchase up to an additional shares of common stock. If the underwriters' over-allotment option is exercised in full, the number of shares of common stock held by existing stockholders will be reduced to % of the total number of shares of common stock outstanding after this offering and the number of shares of common stock held by new investors will be increased to , or % of the total number of shares of common stock outstanding after this offering.

The information also assumes no exercise of any outstanding stock options. As of June 30, 2000, there were 1,326,123 shares of common stock issuable upon the exercise of outstanding stock options at a weighted average exercise price of $1.09 per share. To the extent that any of these options are exercised, there will be further dilution to new investors.

24

SELECTED FINANCIAL DATA

You should read the following selected financial data in conjunction with our financial statements and related notes and "Management's Discussion and Analysis of Financial Condition and Results of Operations" appearing elsewhere in this prospectus. We have derived our selected statement of operations data for the years ended December 31, 1997, 1998 and 1999 and the selected balance sheet data as of December 31, 1998 and 1999 from the audited financial statements included elsewhere in this prospectus. The selected balance sheet data as of December 31, 1995, 1996 and 1997 and the statement of operations data for the years ended December 31, 1995 and 1996 are derived from our audited financial statements, which are not included in this prospectus. The selected statement of operations data for the six months ended June 30, 1999 and 2000 and the selected balance sheet data as of June 30, 2000 are derived from unaudited financial statements included elsewhere in this prospectus. We prepared the unaudited financial statements on the same basis as the audited financial statements and, in our opinion, they include all adjustments, consisting only of normal recurring adjustments, we consider necessary for a fair presentation of our financial position and results of operations for the periods presented. Historical results are not necessarily indicative of results of operations to be expected for future periods, and the results of the interim periods are not necessarily indicative of the results to be expected for a full year.

Our redeemable convertible preferred stock has a feature that requires us to repurchase the redeemable convertible preferred stock from its holders at the election of the holders of at least two-thirds of the outstanding redeemable convertible preferred stock commencing January 1, 2000. Accretion of redeemable convertible preferred stock represents the charge to retained earnings and net loss available to common stockholders we took in 1995, 1996, 1997, 1998 and 1999 and the six months ended June 30, 1999 and 2000 to reflect this potential liability. The outstanding shares of redeemable convertible preferred stock will convert into shares of our common stock on a one for one basis in connection with the closing of this offering, and no dividends will be paid or converted into common stock. The pro forma net loss per share for the years ended December 31, 1999 and the six months ended June 30, 2000 reflect the conversion of our convertible preferred stock. See the notes to our financial statements included elsewhere in this prospectus for a detailed explanation of how we have computed basic and diluted net loss per share and pro forma basic and diluted net loss per share.

Our operating results for the six months ended June 30, 2000 reflected amortization of deferred stock compensation of $353,000, of which $75,000 was included in cost of revenues. The amortization of deferred stock compensation allocated to operating expense was $278,000 and was comprised of marketing and selling expenses of $91,000, research and development expenses of $48,000 and general and administrative expenses of $139,000.

25

                                                                         Six Months
                                 Years Ended December 31,              Ended June 30,
                          -------------------------------------------  ---------------
                           1995     1996     1997     1998     1999     1999    2000
                          -------  -------  -------  -------  -------  ------  -------
                                (in thousands, except per share amounts )
Statement of Operations
 Data:
Net revenues............  $ 4,274  $ 6,501  $10,031  $15,884  $19,783  $8,918  $11,009
Cost of revenues........    2,027    2,567    3,612    5,577    6,624   3,082    3,908
                          -------  -------  -------  -------  -------  ------  -------
  Gross profit..........    2,247    3,934    6,419   10,307   13,159   5,836    7,101
                          -------  -------  -------  -------  -------  ------  -------
Operating expenses:
  Marketing and
   selling..............    2,105    2,828    4,259    6,275    7,684   3,654    4,395
  Research and
   development..........      645      962    1,602    2,711    2,457   1,288    1,605
  General and
   administrative.......      648      829    1,231    1,638    2,384   1,021    1,152
  Amortization of
   deferred stock
   compensation.........      --       --       --       --       --      --       278
                          -------  -------  -------  -------  -------  ------  -------
    Total operating
     expenses...........    3,398    4,619    7,092   10,624   12,525   5,963    7,430
                          -------  -------  -------  -------  -------  ------  -------
Income (loss) from
 operations.............   (1,151)    (685)    (673)    (317)     634    (127)    (329)
Other income (expense),
 net....................      (12)      21       97      118       20       5       12
                          -------  -------  -------  -------  -------  ------  -------
Income (loss) before
 taxes..................   (1,163)    (664)    (576)    (199)     654    (122)    (317)
Income tax expense......      --       --       --       --       10      --       --
                          -------  -------  -------  -------  -------  ------  -------
Net income (loss).......   (1,163)    (664)    (576)    (199)     644    (122)    (317)
Accretion of redeemable
 convertible preferred
 stock..................      625    1,079    1,292    1,389    2,085     695      692
                          -------  -------  -------  -------  -------  ------  -------
Net loss available to
 common stockholders....  $(1,788) $(1,743) $(1,868) $(1,588) $(1,441) $ (817) $(1,009)
                          =======  =======  =======  =======  =======  ======  =======
Basic and diluted net
 loss per share ........  $(20.55) $(16.29) $ (7.62) $ (3.63) $ (2.56) $(1.47) $ (1.59)
                          =======  =======  =======  =======  =======  ======  =======
Shares used in computing
 basic and diluted net
 loss per share.........       87      107      245      438      562     557      633
Pro forma basic and
 diluted net loss per
 share..................                                      $ (0.17)         $ (0.11)
                                                              =======          =======
Shares used in computing
 pro forma basic and
 diluted net loss per
 share..................                                        8,478            9,565

                                         December 31,
                         ------------------------------------------------  June 30,
                           1995      1996      1997      1998      1999      2000
                         --------  --------  --------  --------  --------  --------
                                            (in thousands)
Balance Sheet Data:
Cash, cash equivalents
 short-term
 investments............ $    459  $    754  $  2,823  $  1,943  $  2,376  $  1,805
Working capital.........      836       830     3,730     3,206     3,814     3,859
Total assets............    2,256     2,681     6,330     7,418     8,699     9,059
Long-term debt, net of
 current portion........      --         10       --        150       --        --
Convertible preferred
 stock..................   13,022    14,234    19,207    21,154    23,842    24,534
Total stockholders'
 deficit................  (11,777)  (13,544)  (15,363)  (16,851)  (18,226)  (18,811)

26

MANAGEMENT'S DISCUSSION AND ANALYSIS OF
FINANCIAL CONDITION AND RESULTS OF OPERATIONS

You should read the following discussion and analysis in conjunction with "Selected Financial Data" and our financial statements and the related notes included elsewhere in this prospectus.

Overview

We develop, manufacture and market screening products for the detection and monitoring of common medical disorders in infants. Currently, we sell our ALGO products for hearing screening, and we expect to begin actively marketing our CO-Stat products for the analysis of hemolysis and management of jaundice in early 2001.

Our net revenues consist of revenues from sales of equipment and disposables. We currently derive substantially all of our net revenues from sales of a limited number of products. Nearly all of our net revenues were from sales of our ALGO products in 1997, 1998, 1999 and the six months ended June 30, 2000. Although we began selling our CO-Stat product in July 1999 on a very limited basis for clinical testing, we have not actively marketed it for commercial sale and expect that a substantial majority of our net revenues will continue to be generated from sales of our ALGO products for at least the next two years.

We sell our products directly through our sales force in the United States and indirectly through distributors internationally. Domestic sales were 86% of our net revenues in 1997, 81% of our net revenues in 1998, 90% of our net revenues in 1999 and 86% of our net revenues in the six months ended June 30, 2000. We plan to expand our international operations significantly because we believe international markets represent a significant growth opportunity. Consequently, we anticipate that international revenues will increase as a percent of net revenues in the future. If international sales increase, we may not experience corresponding growth in operating income due to the higher cost of selling outside of the United States.

We record revenues upon shipment of products to our customers and distributors. Revenues from extended warranty contracts are deferred and recognized on a straight line basis over the contractual period. We provide allowances for estimated warranty costs at the time of revenue recognition based on our historical results. To date, warranty and extended warranty costs have been in line with projected amounts. However, our past product warranty experience may not be indicative of those we may experience in the future. We provide ALGO screening equipment to our customers on loan without charge while we repair or service their screening equipment.

We enter into general sales contracts with our distributors, and those distributors are required to purchase a specified minimum amount of our products. Our only remedy if these distributors fail to purchase the required amounts is to cancel the contract. We rely on our distributors to submit purchase orders for specific quantities of our products. Our sales are final and not subject to a right of return. We do not consider backlog to be a meaningful measure of future revenues because our customers can generally cancel orders without penalty.

Large one-time sales of equipment or disposables may cause our gross profits to be unpredictable from quarter to quarter. Our gross profit may also be adversely affected by the level of sales to international distributors, large individual customers, members of group purchasing organizations or groups of customers, each of which receive volume discounts. Our gross profit may also be affected by changes in manufacturing efficiencies.

Significant investment in research and development has been, and we believe it will continue to be, required to develop new products and enhance existing products to allow us to further penetrate our markets. In

27

addition, research and development costs are impacted by the timing of development activities, including clinical trials, which can have a significant impact on costs in a given period.

During the six months ended June 30, 2000, we granted options to purchase 451,100 shares of our common stock at a weighted average exercise price of $1.53 per share. The weighted average exercise price was below the weighted average deemed fair value of $3.57 per share. We recorded cumulative deferred stock compensation on our balance sheet of $1.5 million in connection with these stock option grants. We will amortize this deferred stock compensation to expense on an accelerated method over the four year vesting periods of the related options. During the remainder of 2000, we expect to amortize stock compensation expense of $425,000. We expect to amortize aggregate stock compensation of approximately $432,000 during 2001, $201,000 during 2002, $63,000 during 2003 and $1,000 during 2004. The amount of stock compensation expense to be recorded in future periods could decrease if options for which accrued but unrecognized compensation has been recorded are forfeited.

As of December 31, 1999, we had approximately $8.4 million of federal net operating loss carryforwards for tax reporting purposes available to offset future taxable income. These net operating loss carryforwards expire beginning in 2002. We have not recognized any benefit from the future use of loss carryforwards for these periods or for any other period since inception because of uncertainty surrounding their realization. We may not be able to utilize our net operating loss carryforwards before they expire if we continue to generate net losses. The amount of net operating losses that we can utilize may be limited under tax regulations in circumstances including a cumulative stock ownership change of more than 50% over a three year period. Accordingly, even if we have net income, the amount of net operating loss carryforwards we can use in any given year may be limited, and we may not be able to use some portion or all of our net operating loss carryforwards. This offering may result in a cumulative change in ownership sufficient to limit our ability to use our net operating loss carryforwards.

Since our inception, we have incurred significant net losses, including net losses available to common stockholders of $1.9 million in 1997, $1.6 million in 1998, $1.4 million in 1999 and $1.0 million in the six months ended June 30, 2000. In addition, we had an accumulated deficit of $19.5 million as of June 30, 2000. We expect to continue to incur net losses for at least the next 12 months.

Our net loss available to common stockholders includes accretion charges to increase over time the carrying amount of our redeemable convertible preferred stock to the amount we would be required to pay if the preferred stock were to be redeemed. Our redeemable convertible preferred stock will convert to common stock on a one to one basis upon the closing of this offering. We will not pay accrued dividends on the redeemable convertible preferred stock when it converts, and accrued but unpaid dividends will become additional paid-in capital.

28

Results of Operations

The following table sets forth the results of our operations expressed as a percent of net revenues. Our historical operating results are not necessarily indicative of the results for any future period.

                                            Percent of Revenue
                                       -------------------------------------
                                                               Six Months
                                          Years Ended             Ended
                                         December 31,           June 30,
                                       ---------------------   -------------
                                       1997    1998    1999    1999    2000
                                       -----   -----   -----   -----   -----
Net revenues.......................... 100.0 % 100.0 % 100.0 % 100.0 % 100.0 %
Cost of revenues......................  36.0    35.1    33.5    34.6    35.5
                                       -----   -----   -----   -----   -----
  Gross profit........................  64.0    64.9    66.5    65.4    64.5
                                       -----   -----   -----   -----   -----
Operating expenses:
  Marketing and selling...............  42.5    39.5    38.8    41.0    39.9
  Research and development............  16.0    17.1    12.4    14.4    14.6
  General and administrative..........  12.3    10.3    12.1    11.4    10.5
  Amortization of deferred stock
   compensation.......................   --      --      --      --      2.5
                                       -----   -----   -----   -----   -----
    Total operating expenses..........  70.8    66.9    63.3    66.8    67.5
                                       -----   -----   -----   -----   -----
Income (loss) from operations.........  (6.8)   (2.0)    3.2    (1.4)   (3.0)
Other income (expense), net...........   1.0     0.7     0.1     0.1     0.1
                                       -----   -----   -----   -----   -----
Income (loss) before taxes............  (5.8)   (1.3)    3.3    (1.3)   (2.9)
Income tax expense....................   --      --      0.1     --      --
                                       -----   -----   -----   -----   -----
Net loss..............................  (5.8)   (1.3)    3.2    (1.3)   (2.9)
Accretion of redeemable convertible
 preferred stock......................  12.9     8.7    10.5     7.8     6.3
                                       -----   -----   -----   -----   -----
    Net loss available to common
     stockholders..................... (18.7)% (10.0)%  (7.3)%  (9.1)%  (9.2)%
                                       =====   =====   =====   =====   =====

For the six months ended June 30, 2000, cost of revenues includes amortization of deferred stock compensation of 0.7%. Amortization of deferred stock compensation for the six months ended June 30, 2000 includes marketing and selling of 0.8%, research and development of 0.4% and general and administrative of 1.3%.

Six Months Ended June 30, 2000 and 1999

Net revenues consist almost exclusively of revenues from the sale of ALGO screening equipment and its related disposables. Our net revenues increased $2.1 million, or 23.4%, from $8.9 million in the six months ended June 30, 1999 to $11.0 million in the six months ended June 30, 2000. These increases were primarily attributable to increased sales of disposables. Net revenues from disposables increased $2.3 million, or 52.4%, from $4.5 million in the six months ended June 30, 1999 to $6.8 million in the six months ended June 30, 2000. As a percent of net revenues, net revenues from sales of disposables increased from 50.3% in the six months ended June 30, 1999 to 62.1% in the six months ended June 30, 2000. No end customer accounted for more than 10% of our net revenues in either of the six month periods ended June 30, 1999 or 2000. Sales to our Japanese distributor accounted for 12% of our net revenues in the six months ended June 30, 2000.

Net revenues from indirect sales outside the United States increased $1.1 million, or 275%, from $400,000 in the six months ended June 30, 1999 to $1.5 million in the six months ended June 30, 2000. This increase was due primarily to the expansion of our operations in Japan and other countries. One factor relating to the increase in net revenues in the Japanese market was the commencement of the Japanese Ministry of Health and Welfare's pilot newborn hearing screening program.

Cost of revenues includes materials costs, personnel expenses, amortization of deferred stock compensation, packaging and shipping costs, other manufacturing costs, warranty expenses and technology

29

license fees. To date, technology license fees have not been material. Our cost of revenues increased $826,000, or 26.8%, from $3.1 million in the six months ended June 30, 1999 to $3.9 million in the six months ended June 30, 2000. The increase in the cost of revenues in absolute dollars was primarily due to the increased volume of screening equipment and disposable supplies sold during the most recent six month period. Cost of revenues did not include any amortization of deferred stock compensation in the six months ended June 30, 1999 but did include amortization of $75,000 of deferred stock compensation in the six months ended June 30, 2000. As a percent of net revenues, the cost of revenues increased from 34.6% in the six months ended June 30, 1999 to 35.5% in the six months ended June 30, 2000. The increase in cost of revenues as a percent of net revenues was attributable to the higher percentage of international sales and the lower per unit selling prices associated with those sales. In addition, our cost of revenues in the six months ended June 30, 2000 was impacted by amortization of deferred stock compensation. Excluding amortization of deferred stock compensation, cost of revenues increased from 34.6% of net revenues in the six months ended June 30, 1999 to 34.8% of net revenues in the six months ended June 30, 2000.

Gross profit increased $1.3 million, or 21.7%, from $5.8 million in the six months ended June 30, 1999 to $7.1 million in the six months ended June 30, 2000. Gross profit as a percentage of net revenues decreased from 65.4% in the six months ended June 30, 1999 to 64.5% in the six months ended June 30, 2000. The decrease in gross profit as a percentage of net revenues was primarily due to a higher percentage of international sales. Excluding the deferred compensation charge, gross profit as a percent of net revenues was 65.4% in the first six months of 1999 and 65.2% in the six months ended June 30, 2000.

Marketing and selling expenses consist primarily of salaries, commissions, travel, promotional and advertising costs. Our marketing and selling expenses increased $741,000, or 20.3%, from $3.7 million in the six months ended June 30, 1999 to $4.4 million in the six months ended June 30, 2000. The absolute dollar increase in marketing and selling expenses was primarily attributable to the hiring of additional marketing and selling personnel, increases in commissions due to increased sales and the expansion of our sales efforts. As a percent of net revenues, marketing and selling expenses decreased from 41.0% in the six months ended June 30, 1999 to 39.9% in the six months ended June 30, 2000. The decrease in marketing and selling expenses as a percent of net revenues was primarily attributable to the increase in net revenues for the six months ended June 30, 2000.

Research and development expenses consist of engineering costs to develop new products, enhance existing products and perform design quality assurance activities. Our research and development expenses increased $317,000, or 24.6%, from $1.3 million in the six months ended June 30, 1999 to $1.6 million in the six months ended June 30, 2000. As a percent of net revenues, research and development expenses were 14.4% in the six months ended June 30, 1999 and 14.6% in the six months ended June 30, 2000. This increase in research and development expenses was primarily attributable to the hiring of additional engineers and consultants.

General and administrative expenses consist of corporate, finance, human resource, administrative and legal expenses. Our general and administrative expenses increased $131,000, or 12.8%, from $1.0 million in the six months ended June 30, 1999 to $1.2 million in the six months ended June 30, 2000. The absolute dollar level increase in general and administrative expenses was primarily attributable to the hiring of additional personnel, as well as increased legal, accounting and other consulting fees. As a percent of net revenues, general and administrative expenses decreased from 11.4% in the six months ended June 30, 1999 to 10.5% in the six months ended June 30, 2000. The decrease in general and administrative expenses as a percent of net revenues was primarily attributable to the increase in net revenues in the six months ended June 30, 2000.

We recorded no amortization of deferred stock compensation in the six months ended June 30, 1999. We recorded aggregate amortization of $353,000 of deferred stock compensation in the six months ended June 30, 2000, of which $75,000 was included in cost of revenues.

30

Other income (expense), net consists of interest income, interest expense and other miscellaneous expenses. Our other income (expense), net increased $7,000, or 140%, from $5,000 in the six months ended June 30, 1999 to $12,000 in the six months ended June 30, 2000. The increase was primarily due to higher interest earned on increased average cash balances in the six months ended June 30, 2000.

Years Ended December 31, 1999 and 1998

Net revenues increased $3.9 million, or 24.5%, from $15.9 million in 1998 to $19.8 million in 1999. These increases were primarily attributable to substantial growth in our installed base of screening equipment, as well as additional sales of disposables to our existing customers. Net revenues from disposables increased $3.6 million, or 51.1%, from $7.1 million in 1998 to $10.7 million in 1999. As a percent of net revenues, net revenues from sales of disposables increased from 44.6% in 1998 to 54.1% in 1999. No end customer accounted for more than 10% of our net revenues in either 1998 or 1999. However, our Japanese distributor accounted for 14% of our net revenues in 1998.

Net revenues from indirect sales outside the United States fell $1.1 million, or 35.4%, from $3.1 million in 1998 to $2.0 million in 1999. The decrease was due to a large one time equipment purchase in 1998 by a local government agency in Belgium that instituted a universal newborn hearing screening program.

Cost of revenues increased $1.0 million, or 18.8%, from $5.6 million in 1998 to $6.6 million in 1999. The increase in the cost of revenues in absolute dollars was primarily due to the increased volume of screening equipment and disposable supplies sold during 1999. As a percent of revenues, the cost of revenues decreased from 35.1% in 1998 to 33.5% in 1999.

Gross profit increased $2.9 million, or 27.7%, from $10.3 million in 1998 to $13.2 million in 1999. Gross profit as a percentage of net revenues increased from 64.9% in 1998 to 66.5% in 1999. The increase in gross profit and the corresponding decrease in cost of revenues as a percent of net revenues was primarily due to increased domestic direct sales and greater efficiencies in our manufacturing and procurement operations.

Marketing and selling expenses increased $1.4 million, or 22.5%, from $6.3 million in 1998 to $7.7 million in 1999. The absolute dollar increase in marketing and selling expenses was primarily attributable to the hiring of additional marketing and selling personnel and increases in commissions due to increased sales. As a percent of net revenues, marketing and selling expenses decreased marginally from 39.5% in 1998 to 38.8% in 1999. The decrease in marketing and selling expenses as a percent of net revenues was primarily attributable to the increase in net revenues in 1999.

Research and development expenses decreased $254,000, or 9.4%, from $2.7 million in 1998 to $2.5 million in 1999. As a percent of net revenues, research and development expenses decreased from 17.1% in 1998 to 12.4% in 1999. This decrease in research and development expenses was primarily attributable to reduced spending on CO-Stat development and clinical trials.

General and administrative expenses increased $746,000, or 45.5%, from $1.6 million in 1998 to $2.4 million in 1999. As a percent of net revenues, general and administrative expenses increased from 10.3% in 1998 to 12.1% in 1999. The increase in general and administrative expenses was primarily attributable to the hiring of additional personnel, as well as increased legal, accounting and other consulting fees. In addition, we elected not to pursue an acquisition of a private company to which we had loaned $200,000, in connection with which we received an exclusive, three month option to purchase substantially all of the assets of the company. We subsequently wrote off the related promissory note, which was in default and deemed uncollectible.

Other income (expense), net decreased $98,000, or 83.1%, from $118,000 in 1998 to $20,000 in 1999, as a result of reduced interest income on a lower level of invested cash balances.

31

Years Ended December 31, 1997 and 1998

Net revenues increased $5.9 million, or 58.3%, from $10.0 million in 1997 to $15.9 million in 1998. This increase was primarily attributable to growth in existing product sales and the introduction of the ALGO Portable product. Net revenues from disposables increased $2.1 million, or 42.0%, from $5.0 million in 1997 to $7.1 million in 1998. As a percent of net revenues, net revenues from sales of disposables decreased from 49.8% in 1997 to 44.6% in 1998, due primarily to a large one-time supply purchase by a single customer in 1997. No end customer accounted for more than 10% of our net revenues in either 1997 or 1998. However, our Belgian distributor accounted for 12% of our net revenues in 1997, and our Japanese distributor accounted for 14% of our net revenues in 1998.

Net revenues from sales outside the United States increased $1.7 million, or 121%, from $1.4 million in 1997 to $3.1 million in 1998. This increase was due to expansion of our operations in Japan, Belgium and other countries.

Cost of revenues increased $2.0 million, or 54.4%, from $3.6 million in 1997 to $5.6 million in 1998. The absolute dollar increase in the cost of revenues was due primarily to the increased volume of screening equipment and disposables sold during the year. As a percent of revenues, the cost of revenues decreased from 36.0% in 1997 to 35.1% in 1998. The decrease in cost of net revenues as a percent of net revenues was primarily due to efficiencies achieved on the greater volume of product shipments.

Gross profit increased $3.9 million, or 60.6%, from $6.4 million in 1997 to $10.3 million in 1998. As a percent of net revenues, gross profit increased from 64.0% in 1997 to 64.9% in 1998. The increase in both absolute dollars and as a percent of net revenues was primarily attributable to increased net revenues and efficiencies achieved in the manufacturing process.

Marketing and selling expenses increased $2.0 million, or 47.3%, from $4.3 million in 1997 to $6.3 million in 1998. As a percent of net revenues, marketing and selling expenses decreased from 42.5% in 1997 to 39.5% in 1998. This increase in absolute dollars was primarily attributable to increased personnel costs, increased trade show and travel costs, and to a lesser extent, the expansion of our marketing and selling activities in Europe.

Research and development expenses increased $1.1 million, or 69.2%, from $1.6 million in 1997 to $2.7 million in 1998. As a percent of net revenues, research and development expenses increased from 16.0% in 1997 to 17.1% in 1998. The increase in research and development expenses was primarily attributable to an increase in the number of engineers we employed for the enhancement of existing products and the development of new products, including the CO-Stat products.

General and administrative expenses increased $407,000, or 33.1%, from $1.2 million in 1997 to $1.6 million in 1998. As a percent of net revenues, general and administrative expenses decreased from 12.3% in 1997 to 10.3% in 1998. The absolute dollar level increase of general and administrative expenses was primarily attributable to hiring of additional personnel.

Other income (expense), net increased $21,000, or 21.6%, from $97,000 in 1997 to $118,000 in 1998. The increase in other income (expense), net was primarily due to lower interest expense in 1998 as a result of lower borrowings under our credit facilities and higher interest earnings on available cash balances.

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Quarterly Results of Operations

The following table presents our operating results for each of the six quarters in the period from January 1, 1999 through June 30, 2000. The information for each of these quarters is unaudited and has been prepared on the same basis as our audited financial statements appearing elsewhere in this prospectus. In the opinion of our management, all necessary adjustments, consisting only of normal recurring adjustments, have been included to present fairly the unaudited quarterly results when read in conjunction with our audited consolidated financial statements and the related notes appearing elsewhere in this prospectus.

                                            Quarters Ended
                         -----------------------------------------------------
                                                      Dec.
                         Mar. 31, June 30, Sept. 30,  31,    Mar. 31, June 30,
                           1999     1999     1999     1999     2000     2000
                         -------- -------- --------- ------  -------- --------
                                            (in thousands)
Net revenues ...........  $4,341   $4,577   $4,715   $6,150   $4,912   $6,097
Cost of revenues........   1,508    1,574    1,654    1,888    1,766    2,142
                          ------   ------   ------   ------   ------   ------
  Gross profit..........   2,833    3,003    3,061    4,262    3,146    3,955
  Gross margin..........    65.3%    65.6%    64.9%    69.3%    64.0%    64.9%
Operating expenses:
  Marketing and
   selling..............   1,691    1,963    1,914    2,116    2,043    2,352
  Research and
   development .........     703      585      587      582      743      862
  General and
   administrative.......     460      561      562      801      563      589
  Amortization of
   deferred stock
   compensation.........     --       --       --       --        27      251
                          ------   ------   ------   ------   ------   ------
    Total operating
     expenses...........   2,854    3,109    3,063    3,499    3,376    4,054
                          ------   ------   ------   ------   ------   ------
Income (loss) from
 operations.............     (21)    (106)      (2)     763     (230)     (99)
Other income (expense),
 net....................       1        4        7        8       19       (7)
                          ------   ------   ------   ------   ------   ------
Income (loss) before
 taxes..................     (20)    (102)       5      771     (211)    (106)
Income tax expense......     --       --       --        10      --       --
                          ------   ------   ------   ------   ------   ------
Net income (loss).......     (20)    (102)       5      761     (211)    (106)
Accretion of redeemable
 convertible preferred
 stock..................     347      348      347    1,043      346      346
                          ------   ------   ------   ------   ------   ------
Net loss available to
 common stockholders....  $ (367)  $ (450)  $ (342)  $ (282)  $ (557)  $ (452)
                          ======   ======   ======   ======   ======   ======

Cost of revenues includes amortization of deferred stock compensation of $10,000 in the three months ended March 31, 2000 and $65,000 in the three months ended June 30, 2000. The amortization of deferred stock compensation allocated to operating expenses in the three months ended March 31, 2000 was comprised of marketing and selling expenses of $9,000, research and development expenses of $6,000 and general and administrative expenses of $12,000. The amortization of deferred stock compensation allocated to operating expenses in the three months ended June 30, 2000 was comprised of marketing and selling expenses of $82,000, research and development expenses of $42,000 and general and administrative expenses of $127,000.

When compared to the comparable quarter from the prior year, net revenues generally have increased each quarter due to sales of a larger number of screening equipment units and disposables to our customers, as well as from increases in the size and productivity of our sales force and broader international distribution. We believe seasonal factors in our business have caused and in the future will continue to cause revenues in the quarter ended March 31 to decrease from the revenues in the immediately preceding quarter. These seasonal factors include patterns in the capital budgeting and purchasing cycles of our current and prospective customers and the economic incentives to our sales force that generally occur in the last quarter of the calendar year. In addition, bulk purchases by a state or agency of a foreign government can cause a significant fluctuation in revenue for any quarter. For example, we received a large order from a state during the quarter ended March 31, 1999 that increased revenues in the quarter significantly.

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Our operating results have varied significantly from quarter to quarter in the past and may continue to fluctuate in the future. The quarterly fluctuations are caused by a number of factors, including:

. the budgeting cycle of our customers;

. the size and timing of specific sales, such as large purchases of screening equipment or disposables by government agencies or hospital systems;

. product and price competition;

. the timing and market acceptance of new product introductions and product enhancements by us and our competitors, such as the expected reduction in demand for our ALGO 2e Color screener prior to the announced launch date of our ALGO 3 screener;

. the length of our sales cycle;

. the loss of key sales personnel or international distributors; and

. changes caused by the rapidly evolving market for newborn screening products.

Many of these factors are beyond our control, and therefore, we believe that results of operations for interim periods should not be relied upon as any indication of the results to be expected in any future period.

Liquidity and Capital Resources

Since inception, we have financed our operations primarily through private sales of convertible preferred stock and common stock, equipment financing and cash generated from product sales. As of June 30, 2000, we had cash and cash equivalents of $1.5 million, an accumulated deficit of $19.5 million and working capital of $3.9 million.

Net cash used by operating activities was $939,000 for the year ended December 31, 1997 and resulted primarily from net losses in that period offset by increases in accrued liabilities and accounts payable. Net cash used by operating activities was $298,000 for the year ended December 31, 1998 and resulted primarily from net losses in that period and increases in accounts receivable and inventory. These uses of cash were partially offset by increases in accrued liabilities and accounts payable. Net cash provided by operating activities was $1.3 million for the year ended December 31, 1999 and resulted primarily from net income. Net cash used by operating activities was $159,000 for the six months ended June 30, 2000 and resulted from increases in inventory and other working capital items.

Net cash used in investing activities was $579,000 for the year ended December 31, 1997, $950,000 for the year ended December 31, 1998, $1.4 million for the year ended December 31, 1999 and $414,000 for the six months ended June 30, 2000. Net cash used in investing activities during these periods was primarily for purchases of new computers, equipment and furniture as we expanded operations, loans to a foreign distributor in the form of convertible notes and the purchase of a long-term investment.

Net cash provided by financing activities was $3.5 million for the year ended December 31, 1997 and resulted primarily from our Series D convertible preferred stock financing. Net cash provided by financing activities was $350,000 for the year ended December 31, 1998 and resulted primarily from borrowings under a bank line of credit and issuance of common stock upon the exercise of employee options. Net cash provided by financing activities was $519,000 for the year ended December 31, 1999 and resulted primarily from the proceeds from the exercise of warrants to purchase series C convertible preferred stock and issuance of common stock upon the exercise of employee stock options. Net cash used by financing activities was $4,000 for the six months ended June 30, 2000 and resulted primarily from the repayment of short-term debt but was offset largely by the proceeds from issuance of common stock upon the exercise of employee stock options.

As of June 30, 2000, we had $75,000 outstanding under a term equipment loan that will be repaid through December 31, 2000.

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Our future liquidity and capital requirements will depend on numerous factors, including:

. the amount and timing of revenues;

. the extent to which our existing and new products gain market acceptance;

. the extent to which we make acquisitions;

. the cost and timing of expansion of product development efforts and the success of these development efforts;

. the cost and timing of expansion of marketing and selling activities; and

. available borrowings under line of credit arrangements and the availability of other means of financing.

We believe that the net proceeds from this offering, together with our current cash and investment balances and any cash generated from operations and from current or future debt financing, will be sufficient to meet our operating and capital requirements for at least the next 18 months. However, it is possible that we may require additional financing within this period. We have no current plans, and we are not currently negotiating, to obtain additional financing following the completion of this offering. We intend to continue to invest heavily in the development of new products and enhancements to our existing products. The factors described above will affect our future capital requirements and the adequacy of our available funds. In addition, even if we raise sufficient funds to meet our anticipated cash needs during the next 18 months, we may need to raise additional funds beyond this time. We may be required to raise those funds through public or private financings, strategic relationships or other arrangements. Any additional equity financing may be dilutive to stockholders, and debt financing, if available, may involve restrictive covenants.

Qualitative and Quantitative Disclosures about Market Risk

We develop products in the United States and sell those products primarily in the United States, Japan and Europe. Our revenues for sales outside the United States were approximately 10% of our net revenues in 1999 and approximately 14% in the six months ended June 30, 2000. As a result, our financial results could be affected by factors such as changes in foreign currency exchange rates or weak economic conditions in foreign markets. Our sales are generally denominated in United States dollars; however, we expect that a portion of our operating expenses and revenues in international locations will be denominated in local currencies in the future. Historically, our exposure to foreign exchange fluctuations has been minimal; however, as our international sales and operations expand, we anticipate that our exposure to foreign currency fluctuations will increase. As all of our sales are currently made in United States dollars, a strengthening of the dollar could make our products less competitive in foreign markets.

Our interest income is sensitive to changes in the general level of interest rates in the United States, particularly since the majority of our investments are in short-term instruments. Due to the nature of our short-term investments, we have concluded that we do not have material market risk exposure.

Our investment policy requires us to invest funds in excess of current operating requirements in:

. obligations of the United States government and its agencies;

. investment grade state and local government obligations;

. securities of United States corporations rated A1 or P1 by Standard & Poors' or the Moody's equivalents; or

. money market funds, deposits or notes issued or guaranteed by United States and non-United States commercial banks meeting certain credit rating and net worth requirements with maturities of less than two years.

As of June 30, 2000, our cash and equivalents consisted primarily of demand deposits and money market funds held by large institutions in the United States. The recorded carrying amounts of cash and cash equivalents approximate fair value due to their short-term maturities.

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Recent Accounting Pronouncements

In December 1999, the staff of the Securities and Exchange Commission issued Staff Accounting Bulletin 101, Revenue Recognition in Financial Statements, or SAB 101, which summarizes certain of the SEC staff's views in applying accounting principles generally accepted in the United States of America to revenue recognition in financial statements. We have not yet determined what the impact of the adoption of SAB 101, if any, will have on our financial position or results of operations.

In June 1998, the Financial Accounting Standards Board issued Statement of Financial Accounting Standards No. 133, Accounting for Derivative Instruments and Hedging Activities, or SFAS 133. SFAS 133 defines derivatives, requires all derivatives to be carried at fair value and provides for hedge accounting when certain conditions are met. We will be subject to SFAS 133 commencing in 2001. We have not yet determined what the impact of the adoption of SFAS 133, if any, will have on our financial position or results of operations.

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BUSINESS

Overview

We are focused on developing, manufacturing and marketing screening products for the identification and monitoring of common medical disorders that may occur during the time from conception to a baby's first birthday. This period is critical to a child's development. By allowing for early detection and treatment, we believe our products can help reduce costs and minimize the probability of unnecessary retesting or hospital readmission. We design our products to deliver accurate results in a rapid and reliable manner. In addition, our products address the standard of care guidelines set forth by the American Academy of Pediatrics.

We have two product lines that have been cleared for marketing by the FDA:
the ALGO and the CO-Stat. We are selling our ALGO products for newborn hearing screening, and, in early 2001, we expect to begin actively marketing our CO- Stat products for the evaluation of newborn jaundice. Both of our current product lines are comprised of hardware units and single-use disposable components.

Our ALGO products use automated ABR to enable simple, non-invasive and accurate screening for hearing impairment in newborns. The ALGO screener delivers sound stimuli to a newborn's ears and analyzes the resulting brain wave responses to produce a "Pass" or "Refer" result. The procedure can be performed within hours after birth. In addition, the ALGO meets the American Academy of Pediatrics' guidelines without requiring a trained audiologist to operate the equipment. We currently sell our ALGO products in the United States, Europe, Japan, Australia and New Zealand.

Our CO-Stat analyzer enables physicians, within hours after birth, to assess the likelihood that serious newborn jaundice will not occur, thereby allowing physicians to keep newborns with higher risk of developing serious newborn jaundice in the hospital or under observation. Jaundice may be a sign of an abnormally high rate of hemolysis. Our CO-Stat analyzers accurately and non- invasively measure the rate of hemolysis by detecting the level of carbon monoxide in exhaled breath. In addition, we are currently investigating the use of the CO-Stat for monitoring and analysis of other conditions, including pregnancy induced hypertension. To date, our CO-Stat products have been sold primarily for clinical research.

Our Opportunity

Approximately 10.5 million children are born every year in industrialized countries, including approximately 3.8 million in the United States. The most critical time in a child's development is from conception to a baby's first birthday. If a baby experiences a medical problem or disease during this period of rapid growth and development, there can be profound and lasting effects on his or her development and long-term societal and financial impacts on the child's family and community.

Early detection of treatable disorders helps to achieve the best possible outcome for the child and can reduce the impact and cost of the disorder. As a result, governments and physician groups in industrialized countries have adopted policies and guidelines for standard medical practices, known as standards of care. The guidelines suggest that physicians should conduct childhood screening and take preventative measures for common and potentially serious disorders. Examples of standards of care include prenatal care offered to pregnant women, universal newborn screening for common disorders and infant immunization for common infections.

Hearing impairment and jaundice are among the more common disorders that a baby may face after birth. Impaired hearing is one of the most common permanent disabilities in infants and affects approximately six per every 1,000 newborns in the United States. Jaundice affects approximately 60% of newborns in the United States and may be a symptom of serious disorders that can cause permanent brain damage or death. Other medical conditions that may occur during pregnancy and the first year after birth include miscarriage and spontaneous abortion, genetic abnormalities, premature labor and delivery, infection before birth, metabolic problems and respiratory disorders. Despite the importance of early identification and treatment of medical conditions in pregnant women and infants, there are limited products for cost-effective and reliable detection of common disorders.

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Our Solution

We believe our products deliver specific, sensitive results in a rapid and reliable manner and are simple to use and cost-effective. We believe our products offer the following benefits:

. Accuracy. Our products are designed to provide highly sensitive, specific and reliable results and meet applicable guidelines developed by the American Academy of Pediatrics.

. Immediate crib-side results. Clinicians can use our products to screen newborns hours after birth. By obtaining the results of the newborn's screening before the baby is discharged from the hospital, the child's physician is able to assess whether discharge or further assessment is appropriate. If the results indicate a potential hearing impairment or that jaundice is likely to develop or worsen, the physician can begin to develop a treatment plan or begin treatment before the baby is discharged.

. Ease of use. Our products are designed to operate with a simple set-up procedure and to be used by hospital staff with only a minimal level of training. Our products are non-invasive and are designed to perform screenings quickly.

. Cost-effectiveness. By identifying the disease or condition early, we believe our products can reduce the long-term costs of care by enabling the physician to begin treatment early. In addition, we believe the accuracy of our devices minimizes erroneous and misleading results and, therefore, lowers the costs of unnecessary retesting or hospital readmission.

. Designed to meet standard of care guidelines. We design our products to meet the standard of care requirements for universal screening programs so that health care providers can obtain reimbursement for newborn screening. Health care providers may not receive reimbursement if their equipment cannot meet the applicable standard of care. We will continue to work with states, other governmental organizations and other third party payor groups to develop standard of care guidelines that include universal hearing screenings.

Our Strategy

Our goal is to become the leading provider of equipment and single-use disposable supplies for detection of common, treatable medical disorders that occur during the period from conception to the baby's first birthday. The key elements of our strategy include:

. Increase awareness. We plan to continue to use the following methods to increase awareness of our products and the need for universal screening:

-- marketing our products to key clinical audiences including neonatologists, pediatricians, obstetricians, ear, nose and throat physicians, pediatric nurses and audiologists;

-- educating physicians and other clinicians about the benefits of newborn screening;

-- supporting the publication of additional clinical research to provide data supporting the expanded use of our products; and

-- expanding our domestic direct sales force and international distribution channels.

. Focus on government and physician groups to promote universal screening of newborns. We believe that clinical education of hospital administrators and government officials will improve awareness of the benefits of universal screening and the advantages of our products. For example, we focus substantial marketing and selling efforts on state and foreign government agencies that fund special education and other services for hearing impaired children. We encourage these state agencies to require universal hearing screening of all newborns and to provide reimbursement or grants to purchase screening equipment. We intend to pursue a similar strategy for future products.

. Continue to advance technology. We intend to aggressively pursue ongoing research and development to introduce new products and improve our existing products and technologies. We believe a number of additional opportunities exist for the screening of newborns and pregnant women.

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. Enhance Natus brand by introducing new products. Through our relationships with key clinicians and administrators and the market acceptance of our hearing screening technology, we believe we are well positioned to distribute existing products and introduce new products into the nursery and neonatal intensive care unit. In addition, we intend to expand our product offerings to address diseases and conditions that affect both babies and pregnant women during the period of time from conception to a baby's first birthday. As recognition of the Natus brand grows, we believe we can introduce a number of new products, which can be marketed to the same clinical audience as our existing ALGO and CO-Stat product lines.

. License our technology to strategic partners for use in screening adults. We intend to enter into strategic partnerships to conduct clinical studies of our products for adult indications including blood disorders, heart and lung diseases and respiratory disorders.

Clinical Background

Hearing Impairment

Overview

Approximately 3.8 million babies are born each year in the United States, and hearing impairment affects approximately six per every 1,000 of those newborns. Until the introduction of universal newborn hearing screening programs, screening was generally performed only on those newborns who had risk factors for hearing impairment, including a family history of hearing impairment, infection prior to birth, low birth weight, skull or facial anomalies or bacterial meningitis. However, screening only those newborns with risk factors for hearing impairment overlooks approximately half of newborns with some level of hearing impairment.

Early identification of hearing impairment and early intervention has been shown to improve language development significantly. Babies identified at birth as deaf or hearing impaired, who begin immediate therapy, can learn and progress at a rate comparable to children with normal hearing, regardless of the severity of hearing loss. However, undetected hearing impairment often results in the failure to learn, process spoken language and speak. A 1997 study conducted at the University of Colorado, Boulder evaluated the impact of a hearing impairment on language and speech. All of the children evaluated in the study were born with a hearing impairment but differed by the age at which it was detected. The study concluded that those children whose hearing loss was detected and received treatment early had significantly better language skills and vocabularies than those children whose hearing loss was detected later.

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Prior to universal newborn hearing screening, the average age of hearing impairment detection was two and one-half years after birth. The following chart from the Marion Downs National Center for Infant Hearing at the University of Colorado, Boulder compares the vocabulary at 36 months of age of hearing impaired children to the vocabulary of children with normal hearing. The following chart illustrates the impact of early identification and intervention.

[Graphic: Diagram showing range of high and low and average number of vocabulary words of children at 36 months of age with normal hearing and with hearing impairment identified at (1) birth, (2) six months and (3) two years.]

The Marion Downs Center estimates that the cost of profound neonatal hearing impairment to society is approximately $79 billion per year in the United States due to increased educational costs, lower lifetime income and higher unemployment. The Marion Downs Center also estimates that profound hearing impairment can cost a child's family and society up to one million dollars during his or her lifetime. Effective and early newborn hearing screening can help to reduce these costs by enabling a newborn with hearing impairment to obtain treatment. Early identification and therapy for hearing impaired children has the potential to reduce the cost of special services and education substantially for state governments. The State of Colorado estimates that a state can save as much as $400,000 per child over his or her lifetime in special services and educational costs alone.

The University of Colorado, Boulder's study also demonstrates that early identification of hearing impairment has a significant impact on the child's development regardless of the degree of hearing impairment. Treatment options for hearing impaired children, include:

. amplification, such as hearing aids;

. therapies for language acquisition, such as sign language;

. oral approaches, such as lip reading; and

. surgical intervention, such as cochlear implants.

These treatments, when begun early, allow the child to learn, listen, speak and process spoken language at more advanced levels throughout his or her life.

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Newborn Hearing Screening

Newborn hearing screening has been performed in the United States since 1964 but has been generally limited to babies with risk factors for hearing impairment. We believe the lack of accurate, low cost screening devices and the subjective nature of other currently used tests has limited the willingness of governments and physicians to adopt hearing screening as a standard of care for all newborns. In recent years, the clinical evidence in support of early detection for hearing impairment combined with the introduction of new screening technology has increased support for universal newborn hearing screening programs. In 1993, the National Institutes of Health and, in 1994, the Joint Committee on Infant Hearing endorsed universal newborn hearing screening. The combined clinical benefit and cost savings provided incentives for states to begin mandating universal newborn hearing screening as early as 1995.

Thirty-one states have universal newborn hearing screening mandates in place with legislation pending in another six states. The majority of the mandates currently allow for implementation over a two to three year period. An additional four states have voluntary programs in place. We defined states that voluntarily comply to be states without mandated universal newborn screening but in which at least 50% of newborns are screened using ALGO equipment. In these states, the state health departments may purchase and distribute hearing screening equipment even though screening is not mandated. We estimate that approximately 94% of births in 2000 will occur in states with mandates, pending mandates or voluntary programs in place.

Status of Universal Newborn Hearing Screening by State
(as of May 2000)

                                               Voluntary
                 Mandatory(1)                  Compliance Legislation Pending No Active Programs

  1995           1999           Texas           Arizona      New Mexico         Alabama
  ----           ----
  Hawaii         Arkansas       Wisconsin       Michigan     Ohio               Alaska
  Rhode Island   Georgia        Wyoming         Montana      Pennsylvania       Delaware
  1997           Illinois       2000            Nevada       Tennessee          Idaho
  ----                          ----
  Connecticut    Indiana        Florida                      Vermont            Iowa
  Mississippi    Kansas         Kentucky                     Washington         Minnesota
  1998           Louisiana      Maine                                           New Hampshire
  ----
  California     Maryland       New Jersey                                      North Dakota
  Colorado       Missouri       Oklahoma                                        South Dakota
  Massachusetts  Nebraska       South Carolina
  Utah           New York
  Virginia       North Carolina
  West Virginia  Oregon
------------------------------------------------------------------------------------------------

(1) The year listed reflects the year the particular state passed legislation or implemented regulations to require universal newborn hearing screening.

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The following graphic illustrates the impact of state newborn hearing screening programs and the estimated number of babies screened annually, each in terms of the estimated number of births in 2000. The differences in the estimated number of births in states with mandated universal screening and the estimated number of babies screened is primarily due to the time it takes hospitals to implement mandated programs, as well as voluntary compliance in states with no mandates.

[Graphic description consisting of 2 pie charts.
Mandatory Universal Newborn Hearing Screening Coverage

Mandated         75%  2.9 million births
Mandate pending  13%  0.5 million births
Voluntary         6%  0.2 million births
No mandate        6%  0.2 million births

Estimated Newborns Screened Not Screened 57% 2.3 million births Screened 43% 1.7 million births]

Recognizing that only 50% of children with hearing impairment have a risk factor, the American Academy of Pediatrics stated that selectively screening babies at high risk was inadequate, and it has recommended that all babies be screened for hearing impairment. In 1999, the American Academy of Pediatrics' Task Force on Newborn and Infant Hearing published guidelines for universal newborn hearing screening programs. These guidelines are intended to establish the standard of care and provide that:

. at least 95% of all newborns should be screened;

. the screening method used must have the ability to detect all infants with a hearing impairment of at least 35 decibels in the better ear;

. the screening method should not refer more than 4% of all children tested for further evaluation;

. no more than 3% of children with normal hearing who are screened should receive results that indicate they have a hearing impairment, a screening error known as a false positive result; and

. no child whose hearing is impaired should receive a normal result, a screening error known as a false negative result.

Because positive results are referred to an audiologist or physician for additional testing and evaluation, the cost of a newborn screening program is reduced by limiting the number of further evaluations stemming from false positive results. In addition, false positive results can cause unnecessary emotional trauma for parents.

In order to meet the guidelines set forth by the American Academy of Pediatrics, a hearing screening program needs to employ a screening method that focuses on two parameters: sensitivity and specificity. Sensitivity is the capacity to detect the disease or disorder in those infants with the disease or disorder. A sensitivity of 100% indicates that no newborns with a hearing impairment receive results indicating the absence of a hearing impairment. Specificity is the capacity to detect those infants without the disease or disorder. A specificity of 100% indicates that no newborns who actually have normal hearing receive results suggesting the presence of a hearing impairment.

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Screening Techniques

Traditional methods of screening for hearing impairment include subjective behavioral tests and more expensive objective diagnostic processes. We believe widespread acceptance of screening newborns for hearing impairment requires a relatively inexpensive screening method that produces sensitive, specific and reliable results. The two traditional technologies used to screen newborns for hearing impairment are auditory brainstem response and otoacoustic emissions.

Auditory brainstem response (ABR). ABR is the most accurate and comprehensive method for characterizing hearing impairment in adults and infants. ABR uses sensors placed on the head to measure the response of the brain and auditory nerves to sounds delivered through earphones. Hearing impairment is evaluated by monitoring the brain's response to varying the frequency and volume of the sounds. Trained clinicians must operate the ABR screening equipment, and the screening results must be interpreted by an audiologist or trained physician. ABR is primarily used to assess the degree of hearing impairment in adults and children and is not widely used for newborn screening due to the high cost, lengthy procedure time and unavailability of trained specialists in many neonatal nurseries.

Otoacoustic emissions (OAE). OAE screening is a method of detecting hearing impairment in adults and children. Otoacoustic emissions are sounds created by the active biomechanical processes within the sensory cells of normal ears. Since otoacoustic emissions are present in normal ears, an absence of otoacoustic emissions is a sign of irregular function of these sensory cells, which could result in hearing impairment. OAE screening uses a probe placed in the ear to deliver auditory stimulus and measures the response of the sensory cells with a sensitive microphone. OAE screening does not evaluate the function of the entire hearing pathway because it does not assess the neural pathways. Therefore, OAE can fail to detect disorders affecting the neural pathways. An individual OAE screening is relatively inexpensive. However, OAE screening can result in an excessive number of false positive results, which require retesting. These false positive results occur because in the first days after birth newborns commonly have fluid in their ears from the birth process, which can impair the ability to accurately assess hearing impairment with one screening.

Automated ABR. In order to address the limitations of other screening techniques, our ALGO product family utilizes automated ABR to provide accurate and non-invasive hearing screening for newborns. The ALGO screener, like ABR devices, utilizes a number of sensors placed on the head to measure the response of the brain and auditory nerves to sounds delivered through earphones. Unlike ABR devices, however, our ALGO screener does not require a trained clinician to conduct the screening or an audiologist or physician to interpret the results. The ALGO screener uses algorithms to perform the screening and draw a conclusion as to whether a baby needs to be referred to an audiologist for further evaluation. We estimate that the annual market for our ALGO products is approximately $140 million.

Hemolysis and Jaundice

Overview

Babies are generally born with a quantity of red blood cells necessary for fetal life but in excess of their needs as newborns. These excess red blood cells are normally broken down by the body in a process known as hemolysis. The two products of hemolysis are a yellow pigment called bilirubin and a proportional amount of carbon monoxide, or CO. Abnormal rates of hemolysis cause abnormal levels of carbon monoxide and bilirubin. An abnormal rate of hemolysis may also be an indicator of a number of other disorders including anemia, infection and some genetic disorders.

High amounts of bilirubin in the body can cause a yellowing of the skin and eyes called jaundice. The high level of bilirubin can result either from too much bilirubin being produced by hemolysis or from the body's failure to excrete the bilirubin. Extremely high levels of bilirubin, or hyperbilirubinemia, are toxic and may cause irreversible brain damage and potentially result in death.

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The American Academy of Pediatrics Committee on Fetus and Newborns estimates that each year 60% of the four million newborns in the United States become jaundiced. According to the Journal of the American Medical Association, neonatal jaundice is the single largest cause for hospital readmission of newborns in the United States and account for 50% of readmissions. Hyperbilirubinemia occurs in approximately 6% to 10% of newborns. Because of the serious consequences of hyperbilirubinemia, the American Academy of Pediatricians recommends that all newborns be closely monitored for jaundice and has called for the physician to determine the presence or absence of an abnormal rate of hemolysis to establish the appropriate treatment for the newborn. We believe that the hospitals in the United States spend approximately $1.3 billion per year to treat neonatal jaundice in the hospital. Of this amount, approximately half is due to treatment of readmitted newborns. By identifying those infants with high rates of hemolysis before they are discharged, fewer newborns would need to be readmitted and treatment could begin earlier.

Depending on its cause, jaundice can be treated by helping the newborn to excrete the bilirubin or to reduce bilirubin production. In the early stages, jaundice can be treated with blue light, known as phototherapy, hydration and frequent feedings. Dangerous or toxic levels of bilirubin are treated by blood exchange transfusion, which is a high-risk procedure for newborns. If a physician can assess the levels of bilirubin being created and excreted by a newborn, the physician can tailor the treatment appropriately, reduce the number of invasive tests required to monitor the levels of bilirubin, evaluate the long-term effects of the jaundice and determine the appropriate term of hospitalization. In full term infants, the level of bilirubin in their blood is highest at approximately 72 hours after birth. However, infants are being discharged from the hospital before 48 hours after birth due to cost considerations. Thus, some infants may develop a potentially dangerous elevation in bilirubin levels after discharge. With early discharge, clinical reports show that the number of cases of brain damage caused by hyperbilirubinemia is on the rise.

Our CO-Stat product measures a baby's exhaled carbon monoxide to indicate the rate at which bilirubin is being produced and may assist the clinician in determining the cause of neonatal jaundice. If the rate of production, or hemolysis, is normal or low, the baby is not producing excessive levels of bilirubin and may be a candidate for early discharge. If the rate of hemolysis is high, this may be an indication of potentially serious disorders and increases the likelihood of neonatal jaundice. If the baby is producing high levels of bilirubin and does not develop jaundice in the first few days, the baby is assumed to be eliminating bilirubin efficiently but the underlying cause of the hemolysis may require treatment. If the baby develops jaundice, monitoring the rate of hemolysis with our CO-Stat product can help determine if jaundice is caused by excessive bilirubin production or inadequate bilirubin excretion.

Screening Techniques

Current means of identifying newborns with high or increasing bilirubin levels include visual observation, blood tests to assess bilirubin levels, antibody tests and the use of devices that measure the amount of yellow in the skin.

Total Serum Bilirubin Test. The total serum bilirubin test is a blood test that measures the total amount of bilirubin in the blood but does not differentiate between increased bilirubin production or decreased bilirubin elimination. As a result, the test does not give the clinician the information necessary to determine the cause of the increased bilirubin level and the most appropriate treatment for the newborn.

The Coombs Test. The Coombs test is another frequently administered blood test that determines whether a specific antibody is affixed to the baby's red blood cells. This antibody is often associated with a high rate of hemolysis in newborns. However, other conditions may result in the presence of the antibody, and the antibody's absence does not rule out a high rate of hemolysis or excessive levels of bilirubin. In addition, the Coombs test does not measure the rate of hemolysis. Even given these limitations, the Coombs test remains the most frequently used indicator of high levels of hemolysis and, in developed countries, it is currently administered to 50% to 60% of newborns prior to hospital discharge.

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Skin Tone Assessment. In recent years, a number of devices have been introduced to monitor changes in bilirubin levels by measuring the amount of yellow in the skin. They are convenient because they do not require a blood sample. However, the reliability of tests performed with these devices is complicated by the variations in skin pigmentation, the baby's age and birth weight. As with the blood sampling methods, measuring the amount of yellow in the skin does not identify the factors contributing to the elevated bilirubin level.

Natus CO-Stat Analyzer. In order to address the limitations of other means of analyzing hemolysis, our CO-Stat product family measures a baby's exhaled carbon monoxide to assess the rate of hemolysis accurately. Hemolysis produces bilirubin and carbon monoxide in equal amounts, so that the rate of bilirubin production can be estimated by an analysis of the carbon monoxide in a newborn's exhaled breath, while correcting for the carbon monoxide existing in the screening environment. The physician can measure the level of exhaled carbon monoxide to assess the rate of hemolysis. An assessment of how rapidly a newborn is producing bilirubin can help to identify those newborns who are more likely to develop jaundice after discharge from the hospital. If a newborn develops jaundice, knowing how rapidly a newborn is producing bilirubin can also help physicians determine whether jaundice stems from excessive bilirubin production or failure to excrete bilirubin adequately. We estimate that the annual market for our CO-Stat products is approximately $200 million.

Our Products

Our products include the ALGO, MiniMuff and CO-Stat products. The ALGO screeners and single use disposable supplies are designed to objectively test newborn hearing shortly after birth and prior to discharge. We also make the MiniMuff, a single use protective ear cover, which reduces the noise newborns in neonatal intensive care units hear. The CO-Stat analyzer and disposable supplies are designed to provide a measure of the rate of hemolysis in order to monitor the cause of elevation in the level of bilirubin. The following table provides a list of our current products.

Hearing Products                         Description                     Approved Markets

ALGO 2e Color Screener   Newborn hearing screening station           United States, Europe,
                                                                     Japan, Australia and New
                                                                     Zealand

ALGO Portable Screener   Portable newborn hearing screening station  United States, Europe
                                                                     and Japan

ALGO Disposable Kit:     Single use disposables including earphones
                         and                                         United States, Europe,
 Ear Couplers Jelly      electrodes                                  Japan, Australia and
 Button Sensors                                                      New Zealand

MiniMuff                 Single use disposable ear cover to reduce   United States, Europe
                         noise                                       (no approval required),
                                                                     Australia and
                                                                     New Zealand

Jaundice/Hemolysis Products

CO-Stat Breath Analyzer  Newborn screening station to analyze the    United States and Europe
                         rate of hemolysis

CO-Stat Disposable Kit:  Single use disposables including tubing and United States and Europe
 Sample Tubing Filters   filter unit for patient sampling


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Hearing Products

ALGO Product Family

Our ALGO product family utilizes automated ABR technology to provide accurate and non-invasive hearing screening for newborns. The ALGO screener delivers thousands of soft clicking sounds at 35 decibels to the newborn's ears through sound cables and disposable ear phones connected to the instrument. Each click elicits a series of identifiable brain waves, which are detected by disposable sensors placed on the baby's forehead and shoulder and at the nape of the neck. The ALGO screener automatically extracts the infant's brainwave responses from the background noise and noise caused by muscle activity. These brainwave responses are then compared to a template based on the brainwave responses of infants with normal hearing. The ALGO screener displays a "Pass" message when it collects sufficient data to establish that the baby's responses are normal with a 99.96% level of statistical confidence. If a determination cannot be reached after 15,000 clicks, the ALGO screener displays a "Refer" message, indicating that the infant should be referred for more detailed evaluation. We believe that by using AABR technology our ALGO products have a number of advantages:

. Accuracy. Tests using automated ABR have the highest documented specificity and sensitivity for newborn hearing screening of devices not requiring a specially trained audiologist.

. Compliant with standard of care guidelines. Our ALGO screener meets the requirements of the American Academy of Pediatricians for universal newborn hearing impairment.

. Immediate crib-side results. Our screening tests can be conducted within hours after birth. Middle ear fluid and ear canal debris, which are often still present in the first 12 to 24 hours of after birth, do not significantly affect the results of our test.

. Non-invasive. No probes are used to conduct our tests.

. Ease of use. Our test can be administered by nurses or other hospital staff with minimal training because it does not require a trained audiologist to conduct the screening or interpret the results.

. Objective results. Our test produces objective "Pass" or "Refer" results, which do not require interpretation by an audiologist or other trained clinician.

. Rapid results. ALGO hearing screenings can be performed and results can be obtained prior to discharge from the hospital.

The ALGO Newborn Hearing screener line was first introduced in 1985. We have since introduced five new versions of the ALGO and currently market the ALGO 2e Color and the ALGO Portable.

ALGO 2e Color Screener. In December 1998, we introduced the ALGO 2e Color, which incorporates a laptop computer containing our circuit boards and uses commercially available operating system software. This system uses our software to conduct simultaneous screening of both ears and also conducts tests at 40 decibels and 70 decibels. The ALGO 2e Color uses our software to store results from every test automatically, which facilitates prompt follow-up and tracking of patient results. Users can print daily, weekly or monthly reports, create backup files and integrate screening results into statewide databases. The ALGO 2e Color also is designed to allow for future software and hardware upgrades. The current list price of the ALGO 2e Color is $17,500.

ALGO Portable Screener. In June 1998, we introduced the ALGO Portable, which is compact and weighs less than five pounds. The ALGO Portable screener provides the flexibility to screen newborns in the newborn nursery, doctor's office, clinic or home. The ALGO Portable comes with an attachable printer and is sold primarily in Europe and to low-volume birthing centers and hospitals. The current list price of the ALGO Portable is $10,900.

ALGO Disposable Kit. For infection control and accuracy, each hearing impairment test conducted with the ALGO is carried out with the ALGO disposable kit that includes single use earphones, which we call Ear

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Couplers, and electrodes, which we call Jelly Button Sensors. All of our screening supplies are alcohol and latex-free, and our adhesives are specially formulated for newborns. The current list price of our ALGO disposable kit is $9.75 per kit.

Currently some hospitals use our ALGO products to screen only those newborns with risk factors for hearing losses while other hospitals use our ALGO products in their universal newborn screening programs.

MiniMuff Neonatal Noise Attenuators

In 1995, we introduced our MiniMuff neonatal noise attenuators, which are disposable earmuffs designed to decrease noise exposure for babies in neonatal intensive care units. The MiniMuff fits securely over a baby's ear and reduces sound levels by at least seven decibels, representing a reduction of sound pressure by more than 50%. Our MiniMuff products are sold in the United States and meet health care infection control standards through a single use design. They adhere to the baby's head with a non-toxic adhesive and are designed for a single use on a single patient for one day. The current list price of our MiniMuff product is $5.00.

Hemolysis Products

CO-Stat Product Family

Our CO-Stat product measures a baby's exhaled carbon monoxide to indicate the rate at which bilirubin is being produced and may assist the clinician in determining the cause of neonatal jaundice. We believe that our CO-Stat products have a number of advantages, which include:

. Accuracy. We believe our CO-Stat analyzer produces reliable results because it separates environmental carbon monoxide from carbon monoxide in exhaled breath.

. Address standard of care guidelines. Our CO-Stat products can be used by physicians to address the guidelines of the American Academy of Pediatrics, which recommends the monitoring of the rate of hemolysis in newborns.

. Immediate crib-side results. Screening procedures using the CO-Stat analyzer can be conducted in less than 10 minutes and within hours after birth.

. Non-invasive. No invasive probes or needles are used to conduct hemolysis screening with the CO-Stat analyzer.

. Objective results. The CO-Stat test results are not affected by variations in skin tone or the after effects of the birth process on skin color.

. Ease of use. Our CO-Stat test can be administered by nurses or other hospital staff with minimal training.

. Important clinical data provided. The CO-Stat analyzer indexes the rate at which the baby is producing new bilirubin to aid physicians in determining the cause of newborn jaundice and selecting appropriate therapies.

By measuring and subtracting the environmental carbon monoxide during the screening procedure, CO-Stat isolates trace levels of carbon monoxide produced primarily through the breakdown of red blood cells. This information helps physicians distinguish between the jaundice stemming from bilirubin production rather than the body's failure to excrete bilirubin. The CO-Stat assists clinicians to assess bilirubin production, but does not determine the level of bilirubin.

CO-Stat End Tidal Breath Analyzer. Our CO-Stat End Tidal Breath Analyzer is a patient-side device used for the non-invasive, quantitative measurement of respiratory rate, carbon dioxide concentration and carbon monoxide concentration in the breath. We believe that the CO-Stat analyzer is the only commercially available product that can detect the rate of hemolysis in newborns. We received FDA clearance for use of our CO-Stat products to monitor hemolysis in March 1998. However, we have not yet begun to actively market our CO-Stat products. We intend to market the CO-Stat analyzer upon release of a study of the cost-effectiveness and reliability of jaundice monitoring with CO- Stat as compared to the Coombs test. This study is scheduled to be completed by the University of Chicago in early 2001.

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CO-Stat Disposables. A small plastic tube containing filters attaches to the CO-Stat analyzer and is placed at the opening of the baby's nostril. To ensure proper infection control and accuracy of the test, the tube and filters used to sample the baby's breath and environmental carbon monoxide are disposed of after a single use. The sampling of environmental carbon monoxide alters the tube and filters so that they cannot be reused for another test.

Development Status

We conducted a two year study of the CO-Stat analyzer at ten sites with 1,200 newborns to evaluate the ability of the carbon monoxide analysis alone and in combination with blood-based bilirubin testing to identify newborns who are at risk for developing hyperbilirubinemia. Principal clinical investigators in the United States included researchers from Stanford University, University Hospital of Cleveland, Women & Infants' Hospital in Providence, Rhode Island, the University of Pennsylvania and William Beaumont Hospital in Royal Oak, Michigan. Investigators from hospitals in Israel, Hong Kong and Japan also participated. Based on the data gathered during the study, the investigators concluded that a high rate of hemolysis is an important contributing factor in the majority of cases of hyperbilirubinemia. In addition, the investigators concluded that the CO-Stat enables clinicians to rule out excessive rates of hemolysis and thereby identify those babies who potentially may be discharged early because they are not likely to develop hyperbilirubinemia. In addition, the study also concluded that the preferred means of conducting pre-symptomatic jaundice monitoring is assessing bilirubin production and elimination concurrently. The CO-Stat assists clinicians to assess bilirubin production, but does not determine the level of bilirubin in the blood or bilirubin elimination.

In addition, the University of Chicago is conducting a clinical study of approximately 600 babies to assess the cost-effectiveness and reliability of the CO-Stat as compared to the Coombs test.

Customers

Our customers include neonatologists, physicians, audiologists, hospitals and government agencies. We have sold 2,570 ALGO screeners. Our ALGO products have been installed in approximately 40% of the approximately 4,000 hospitals with birthing facilities in the United States.

Of our customers, which made purchases from us in 1999, 87% also made purchases from us in the first seven months of 2000. We sold disposable supplies to conduct approximately 1.2 million tests in 1999 and approximately 770,000 tests in the six months ended June 30, 2000. While the majority of our sales have been to customers in the United States, we have also sold ALGO screeners in 22 countries, including Austria, Australia, Belgium, Germany, Japan, New Zealand and the United Kingdom.

In general, our customers initially buy ALGO screening equipment and a small supply of disposables and then increase the purchase of disposables over time for screening of high risk newborns. We intend to sell our existing ALGO products more extensively within our existing customer sites and sell new products, such as CO-Stat, as we expand our product offerings. We will also continue to pursue state and hospital system sales as appropriate. We have not yet begun to actively market our CO-Stat analyzer. In 1999 and the six months ended June 30, 2000, no single end customer comprised more than 10% of our net revenues.

Marketing and Sales

Our ALGO products have been commercially available since 1985, and we began selling our MiniMuff products in 1995. We intend to begin marketing our CO-Stat products for commercial use in 2001. We intend to use similar methods to sell our CO-Stat products as we currently use to sell our ALGO products.

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Marketing

Our marketing strategy is to attempt to distinguish our products by their level of sensitivity, specificity and reliability, ease of use and pre- discharge testing advantages. Our marketing staff consists of 13 persons. We attempt to educate customers and potential customers about our products through:

. participation in physician group and health care agency conferences;

. efforts by our clinical educators;

. publications in professional journals;

. our web site;

. print and direct mail advertising;

. participation in seminars; and

. electronic mail notification to customers about new products.

We believe that educational efforts directed at government agencies and other third party payors about the benefits of universal screening in terms of patient outcomes and long-term treatment costs are a key element of our marketing strategy.

Direct Sales

We have a direct sales force in the United States. As of June 30, 2000, our sales force consisted of 14 sales representatives, two of whom focus exclusively on state programs and national accounts, 12 clinical educators and two telesales representatives. Following each sale, our clinical educators visit the customer to provide training, ongoing customer and technical support and program development.

In the United States, we sell our ALGO screeners and MiniMuffs to three groups of potential purchasers:

. States. To reduce the cost of special education and state funded rehabilitation programs, many states have mandated universal newborn hearing screening through legislation or provided funding for screening at hospitals. Some of these states purchase hearing screening units directly from us and loan them to hospitals. New Mexico, Mississippi, Georgia, North Carolina and Oklahoma have each purchased ALGO products for hospital placement.

. Hospitals. Hospitals often purchase hearing screeners from us directly, either in response to a state mandate requiring universal newborn hearing screening or in conjunction with a voluntary screening program.

. Neonatologists, pediatricians and audiologists. Our sales force often identifies these professionals as the advocate of universal hearing screening programs within the hospital. We focus our sales efforts on these individuals who tend to be knowledgeable about the cost and treatment benefits of universal newborn hearing screening.

Direct sales accounted for approximately 90% of our net revenues in 1999 and approximately 86% of our net revenues in the six months ended June 30, 2000.

Indirect Sales

In addition to our direct sales force, outside the United Sates we have historically relied heavily on indirect sales channels. Revenues from sales through distributors were approximately 10% of net revenues in 1999 and approximately 14% of net revenues in the six months ended June 30, 2000. Our distributors either assist our direct sales staff or are our sole sales and support representatives in their territories. We have established a network of distributors in Europe, Asia and Australia. Our distributors typically perform marketing, sales and technical support functions in their country or region. Each one may distribute directly to the customer, via other distributors or resellers or both. We actively train our distributors in both product and sales methods. Although we have previously relied exclusively on distributors in Japan, we have recently established a Japanese subsidiary and intend to commence direct sales in Japan in late 2001.

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In addition, approximately 90% of the hospitals in the United States are members of group purchasing organizations, which negotiate large volume purchase prices for member hospitals, group practices and other clinics. We have recently signed agreements with Novation and AmeriNet, Inc. and we intend to enter into similar agreements with other group purchasing organizations in the future. These group purchasing organizations are not required to continue to negotiate prices with us, and the members of these organizations are not required to purchase our products. Sales to members of Novation accounted for approximately 20.6% of our net revenues in the six months ended June 30, 2000. The members of these group purchasing organizations receive volume discounts and other special pricing considerations from us. Many of our existing customers are members of group purchasing organizations including Novation and AmeriNet.

Customer Service and Support

Our ALGO products are sold with a one-year warranty. We intend to make available a similar warranty for the CO-Stat analyzer for an additional fee. We also sell extended warranty agreements for our ALGO products. We provide service to our domestic customer base through our Cottonwood, California service center. This facility is equipped to perform full service, repair, and calibration services to customers on a warranty and fee basis. Service for our international customers is provided either by TriVirix International, Inc., our European contract manufacturer, Nippon Eurotec, our Japanese distributor, or our Cottonwood facility. We have certified TriVirix to perform all levels of service and repair on ALGO products.

Third Party Reimbursement

In the United States, health care providers that purchase products like ours generally rely on third party payors, including private health insurance plans, federal Medicare, state Medicaid and managed care organizations, to reimburse all or part of the cost of the procedure in which the product is used. Our ability to commercialize our products successfully in the United States will depend, in part, on the extent to which reimbursement is available for screenings performed with the ALGO screening or CO-Stat analyzer. Third party payors can affect the pricing or the relative attractiveness of our products by regulating the maximum amount of reimbursement these payors, such as insurance companies or health maintenance organizations, provide for testing services.

The current cost reduction orientation of third party payors makes it difficult for new medical screening and testing devices and tests performed with them to be eligible for reimbursement. Often, it is necessary to convince these payors that the new devices or procedures will establish an overall cost savings compared to the cost of those that are currently reimbursed or long- term treatment for the condition if the screening does not occur early. While we believe that our products possess economic advantages that will be attractive, third party payors may not make reimbursement decisions based upon these advantages. Third party payors are increasingly scrutinizing and challenging the prices charged for medical products and services. In addition, certain hospitals and physicians are moving toward a managed care system in which the hospital or physician contracts to provide comprehensive health care for a fixed cost per patient.

Effective October 1, 1991, the United States' Health Care Finance Administration, or HCFA, adopted regulations that provide for the inclusion of capital related costs in the prospective payment system for hospital inpatient services. Under this system most hospitals are reimbursed by Medicare on a per diagnosis basis at fixed rates unrelated to actual costs incurred in making the diagnosis. Under this system of reimbursement, equipment costs generally are not reimbursed separately, but rather are included in a single, fixed rate per patient reimbursement for screening based on approved current procedural terminology codes. These regulations are being phased in over a ten year period. Recently enacted Medicare reform legislation required the HCFA to implement a prospective payment system for outpatient hospital services by 1999 as well. This system also provides for a per-patient fixed rate reimbursement for outpatient department capital costs. Although the full implications of these changes cannot be known, we believe that the regulations will place more pressure on hospitals' operating margins, causing them to limit capital expenditures. These regulations

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could cause hospitals to decide to defer purchasing equipment like our products as a result of limitations on their capital expenditures. The recent Medicare legislation also requires HCFA to adopt uniform coverage and administration policies for laboratory tests.

In addition to traditional third party reimbursement, universal newborn hearing screening may be either paid for directly by the state or through private insurance coverage required by state legislation. Thirty-one states have passed legislation requiring newborns to be screened for hearing impairment prior to hospital discharge.

In the United States, we have found the state to be the most appropriate level of government to implement universal newborn hearing screening. At the state level, the cost of newborn hearing screening can most directly be weighed against the much higher cost to the state of education and treatment programs required for the hearing impaired. A key element of our reimbursement strategy for the ALGO products has been to promote the adoption of universal newborn hearing screening legislation and equipment purchases at the state level.

States typically implement universal newborn hearing screening in the following manners:

. Voluntary. Hospitals are not required to provide universal newborn hearing screening, but the state supports programs with grants. The state may also purchase the equipment and disposables directly and provide them to hospitals.

. Mandate with equipment purchase. The state has mandated universal newborn hearing screening, and the state purchases equipment and disposables for birthing facilities.

. Mandate with state reimbursement. The state has mandated universal newborn hearing screening and reimburses hospitals on a per-test basis.

. Mandate without state reimbursement. The state has mandated universal newborn hearing screening and requires third party reimbursement, usually as a part of the newborn birth process amount.

We help our customers understand the applicable regulations in their state and provide them with copies of published public policies. We also provide hospitals with local references so that customers may learn more about reimbursement in their states.

Reimbursement systems in international markets vary significantly by country and, within some countries, by region. Reimbursement approvals must be obtained on a country-by-country basis or a region-by-region basis. In addition, reimbursement systems in international markets may include both private and government sponsored insurance.

There are currently no states that have passed legislation related to universal newborn hemolysis monitoring.

Manufacturing

A significant portion of the components of our products are manufactured for us by other manufacturers. However, we perform final assembly, testing and packaging ourselves to control quality and manufacturing efficiency. In order to reduce costs and to add additional capacity, in the future we may move some labor intensive operations to less costly manufacturing locations or outsourcing processes. For example, we entered into an agreement with TriVirix in December 1998 for the manufacture of our ALGO Portable product.

We use contract vendors to manufacture our disposable products, and we perform monthly quality audits of these vendors. We expect to hire additional personnel to assemble our CO-Stat products. We will also need to enhance our manufacturing operations to increase our capacity once we begin commercial sale of these products.

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We purchase materials and components from qualified suppliers that are subject to our stringent quality specifications and inspections by us. We conduct quality audits of our key suppliers, several of which are experienced in the supply of components to manufacturers of finished medical devices or disposables for use with these medical devices. Most of our purchased components are available from more than one supplier. For those components for which relatively few alternate supply sources exist, we are currently trying to locate additional suppliers that meet our quality standards as well as specific regulatory compliance standards.

Currently, only one supply source exists for the adhesive used in our ALGO disposables and our MiniMuff product. The adhesive, called hydrogel, is manufactured by a supplier that also sells the product to a variety of other medical device manufacturers. We are in the process of identifying other sources of hydrogel for ongoing supply, but, in the meantime, our disposables manufacturer has scheduled long term delivery of hydrogel for our products in an amount that we believe will be sufficient to allow us time to locate and qualify a new supplier should our current supplier fail to fulfill our needs. Other formulations of hydrogel exist. However, if a new adhesive is incorporated into our products, then those products may require new regulatory clearance by the FDA, as well as by similar regulatory agencies outside the United States. In addition, we have used a single source to obtain electrochemical sensors for our CO-Stat analyzer. Other sources of supply exist for this component, but we could experience a delay in production of our CO- Stat analyzers if we were unable to obtain a sufficient quantity from our current vendor.

Our manufacturing facility and service and repair facility are subject to periodic inspection by United States, state and foreign regulatory authorities. Our quality assurance system is subject to regulation of both the FDA and the State of California. We are required to conduct our product design, testing, manufacturing and control activities in conformance with the FDA's quality system regulations and to maintain our documentation of these activities in a prescribed manner. Our manufacturing and service and repair facilities are registered and/or licensed by the FDA and the California Department of Health Services, Food and Drug Branch. We have passed all quality system regulations inspections of our facilities conducted by the FDA and the State of California. In addition, our facility has received ISO 9001/EN46001 certification. ISO 9001/EN46001 certification standards for quality operations have been developed to ensure that companies know the standards of quality on a worldwide basis. We have also received the EC Certificate pursuant to the European Union Medical Device Directive 93/42/EEC, which allowed us to place a CE mark on our products after assembling appropriate documentation.

We entered into a manufacturing agreement with TriVirix to serve as our European manufacturing, service and distribution center. We qualified TriVirix's Belfast, Northern Ireland facility to produce the ALGO Portable in April 1999. TriVirix is also an FDA registered manufacturing facility with a full quality system in place in accordance with the FDA's Quality System Regulation and ISO 9002. TriVirix currently supplies all of our ALGO Portable units.

Research and Development

We believe that strong product development capabilities are essential to our strategy of enhancing our core technology and developing additional test applications for our current products.

ALGO 3

We are developing the ALGO 3, a new ALGO screener, which will incorporate software designed to increase ease of use. In addition, we believe the added features will enable the ALGO 3 to generate greater accuracy to further reduce the percentage of false negatives. We expect to begin clinical trials of the ALGO 3 in the fourth quarter of 2000. We cannot market the ALGO 3 without FDA clearance, and we intend to request FDA clearance upon completion of the clinical trials.

Expanded Indications for CO-Stat

We believe our CO-Stat analyzer may have additional applications for testing of other diseases and common conditions. For example, we believe the CO-Stat may be used to detect pregnancy induced

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hypertension in its early stages. Exhaled carbon monoxide may be a clinical indicator for disorders such as sudden infant death syndrome, pneumonia, asthma and blood disorders. However, there are no current commercial uses for our CO- Stat analyzer in diagnosing or monitoring these conditions and we cannot be sure we will ever market a device to monitor or screen for these or any other disorders.

Our research and development expenses were $1.6 million in 1997, $2.7 million in 1998, $2.5 million in 1999 and $1.6 million in the six months ended June 30, 2000. As of June 30, 2000, we had 16 people engaged in research and development activities.

Proprietary Rights

Our products rely on our internally developed intellectual property and other proprietary rights. We rely on a combination of patent, copyright, trademark and trade secret laws, confidentiality procedures and contractual provisions to protect our intellectual property and other proprietary rights. However, we believe that these measures afford only limited protection. We have eight United States patents, five patent applications pending before the United States Patent and Trademark Office and seven patent applications pending before foreign governmental bodies of which one European patent office application has been allowed and will be registered in nine European countries. Our ALGO screeners and CO-Stat analyzers use our proprietary software to produce their results, which we license under shrink wrap licenses that are included as part of the product packaging. Shrink wrap licenses are not negotiated with or signed by individual customers and purport to take effect upon the opening of the product package or use of the screening equipment. We also generally enter into confidentiality agreements with our employees and technical consultants. Despite our efforts to protect our proprietary rights, unauthorized parties may attempt to copy aspects of our products or improperly obtain and use information that we regard as proprietary. Monitoring unauthorized use of our products is difficult and we are unable to determine the extent to which unauthorized use of our products exists. In addition, the laws of some foreign countries do not protect our proprietary rights as fully as do the laws of the United States. Our means of protecting our proprietary rights may be inadequate and enforcing our intellectual property rights could be costly and time consuming and may divert our management's attention and resources. Enforcing our intellectual property rights could also result in the loss of intellectual property rights.

We are not aware that our products employ technologies that infringe any valid proprietary rights of third parties and no assertions of infringement have been made by any third parties. However, the medical device industry is characterized by the existence of a large number of patents and frequent litigation based on allegations of patent infringement. As the number of entrants into our market increases, the possibility of an infringement claim against us grows. While we attempt to ensure that our products do not infringe other parties' patents and proprietary rights, our competitors may assert that our products and the methods we employ now or in the future may be covered by U.S. patents held by these competitors. In addition, our competitors may assert that the products and the methods we employ now or in the future infringe their other proprietary rights. Any infringement claims, with or without merit, could be time consuming to defend or result in costly litigation or damage awards. Any claim could divert management's attention and resources or cause a significant disruption in our revenues while we redesign products if we are found to infringe. A claim also could cause product shipment delays or cessation or require us to enter into royalty or licensing agreements. These royalty or licensing agreements may not be available on terms acceptable to us, if at all.

Competition

We compete in intensely competitive and rapidly evolving markets. We face competition primarily from medical device companies that manufacture hearing screening products, testing products for determining bilirubin levels based on skin color and chemicals used to conduct the Coombs test or blood-based bilirubin monitoring tests. We have experienced and expect to continue to experience increased competition from current and potential competitors, many of which have significantly greater financial, technical, marketing and other resources.

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Companies offering competitive products vary in scope and breadth. With respect to our hearing impairment screening products, our competitors include:

. ETYMOTIC Research, Kedly, Inc., Nicolet Biomedical/Grason-Stadler, Inc., Madsen Electronics, Otodynamics, Ltd., Starkey Laboratories, Inc. and Welch Allyn, Inc., which sell OAE products;

. Bio-Logic Systems, Intelligent Hearing Systems and Sonamed Corp., which sell enhanced ABR and OAE products; and

. SLE Ltd., which sells ABR products.

With respect to our CO-Stat products, our competitors include:

. Johnson & Johnson and Roche, which sell laboratory equipment and chemicals used to conduct the Coombs test or to measure bilirubin levels in the blood; and

. Chromatics Color Sciences, Minolta and SpectRx, which sell equipment to measure the yellowness of the skin.

We believe the principal factors that will draw clinicians and other buyers to a newborn testing product, including hearing testing and hemolysis monitoring products, include:

. the level of specificity, sensitivity and reliability of the product;

. the time required to run tests with the product;

. the relative ease of use of the product;

. the depth and breadth of the product's features;

. the quality of customer support for the product;

. the frequency of product updates;

. the extent to which third party reimbursement for the purchase of the product or the screening is available;

. the extent to which the products conform to standards of care guidelines; and

. the price of the product.

We believe that we compete favorably on these factors. However, we expect competition in the newborn screening to increase significantly as new companies enter the market and current competitors expand their product lines and services. Many of these potential competitors are likely to enjoy substantial competitive advantages, including greater resources that can be devoted to the development, promotion and sale of their products. In addition, these potential competitors may have more established sales channels, greater product development experience or greater name recognition.

Government Regulation

FDA's Premarket Clearance and Approval Requirements

Unless an exemption applies, the FDA must either clear or approve in advance each medical device that we wish to market in the United States, pursuant to the Federal Food, Drug, and Cosmetic Act of 1938, as amended. Unless an exemption applies, each medical device that we wish to market in the United States must receive in advance from the FDA either:

. clearance pursuant to Section 510(k) of the Food, Drug, and Cosmetics Act; or

. premarket approval pursuant to Section 515 of the Food, Drug, and Cosmetics Act, if the FDA has determined that the medical device in question poses a greater risk of injury.

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The FDA's 510(k) clearance process usually takes from four to 12 months, but can take longer. The process of obtaining premarket approval is much more costly, uncertain and may take from one to three years or even longer. We cannot be sure that 510(k) clearance or premarket approval will be obtained for products we propose to market.

The FDA decides whether a device must undergo either the 510(k) clearance or premarket approval process based upon statutory criteria. These criteria include the level of risk that the agency perceives to be associated with the device and a determination of whether the product is a type of device that is substantially equivalent to devices that are already legally marketed. The FDA places devices deemed to pose relatively less risk in either class I or class II, which requires the manufacturer to submit a premarket notification requesting 510(k) clearance, unless an exemption applies. The premarket notification must demonstrate that the proposed device is substantially equivalent in intended use and in safety and effectiveness to an existing legally marketed device that is either in class I, class II, preamendment class III device or any of those for which the FDA has not yet called for submission of a premarket approval. The FDA has classified our ALGO and CO-Stat products as class II devices.

After a device receives 510(k) clearance, any modification made to the device requires the manufacturer to determine whether the modification could significantly affect its safety or effectiveness. If it does not, the manufacturer's decision must be documented. If the modification could significantly affect the device's safety and effectiveness, then the modification requires at least a new 510(k) clearance or, in rare instances, could require a premarket approval. The FDA requires each manufacturer to make this determination, but the FDA can review any manufacturer's decision. If the FDA disagrees with a manufacturer's decision, the agency may retroactively require the manufacturer to seek 510(k) clearance or premarket approval. The FDA also can require the manufacturer to cease marketing the modified device or recall the modified device or both until 510(k) clearance or premarket approval is obtained.

The FDA places devices deemed to pose the greatest risk, such as life- sustaining, life-supporting or implantable devices, or devices deemed to be not substantially equivalent to a predicate device, in class III. The FDA requires these devices to undergo the premarket approval process in which the manufacturer must prove the safety and effectiveness of the device to the FDA's satisfaction. A premarket approval application must provide extensive pre- clinical and clinical trial data and also information about the device and its components regarding, among other things, device design, manufacturing and labeling. After any premarket approval, a new premarket approval or premarket approval Supplement may be required in the event of significant modifications to the device, its labeling or its manufacturing process.

The FDA may require results of clinical trials in support of a 510(k) submission and generally requires clinical trial results for a premarket approval application. In order to conduct a clinical trial, the FDA requires manufacturers to apply for and obtain in advance an investigational device exemption, or IDE. An IDE approval provides for a specified clinical protocol, including the number of patients and study sites. If the FDA deems the product a nonsignificant risk device, the product will be eligible for more abbreviated IDE requirements. The IDE application must be supported by appropriate data, such as animal and laboratory testing results. If the FDA and the Institutional Review Boards at the clinical trial sites approve the IDE application, the manufacturer may begin the clinical trial.

The following chart shows the regulatory status of the products we currently sell:

                      FDA                   Japanese Clearance Australia and
Natus Product   510(k) Clearance CE Marking      (Shonin)       New Zealand

ALGO Portable    June 1998       July 1999    Pending            Pending
ALGO 2e Color    December 1998   July 1999    September 1997     June 2000
CO-Stat          March 1998      July 1999    Pending            Pending
MiniMuff         February 1995   N/A          Pending            June 2000


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Pervasive and Continuing FDA Regulation

Numerous FDA regulatory requirements apply to our marketed devices. These requirements include:

. the FDA's quality system regulation which requires manufacturers to create, implement and follow numerous elaborate design, testing, control, documentation and other quality assurance procedures;

. medical device reporting regulations, which require that manufacturers report to the FDA certain types of adverse and other events involving their products; and

. the FDA's general prohibition against promoting products for unapproved uses.

Class II devices may also be subject to special controls applied to them, such as performance standards, post-market surveillance, patient registries and FDA guidelines that may not apply to class I devices. We could be required to change our compliance activities if the FDA changes its existing regulations or adopts new requirements.

We are subject to inspection and market surveillance by the FDA to determine compliance with regulatory requirements. If the FDA finds that we have failed to adequately comply, the agency can institute a wide variety of enforcement actions, ranging from a public warning letter to more severe sanctions such as:

. fines, injunctions and civil penalties;

. recall or seizure of our products;

. the issuance of public notices or warnings;

. the imposition of operating restrictions, partial suspension or total shutdown of production;

. the refusal of our requests for 510(k) clearance or premarket approval of new products;

. the withdrawal of 510(k) clearance or premarket approval already granted; and

. criminal prosecution.

The FDA also has the authority to require repair, replacement or refund of the cost of any medical device manufactured or distributed by us. Our failure to comply with applicable requirements could lead to an enforcement action that may have an adverse effect on our financial condition and results of operations.

Other United States Regulations

We also must comply with numerous additional federal, state and local laws relating to matters such as safe working conditions, manufacturing practices, environmental protection, biohazards, fire hazard control and hazardous substance disposal. We cannot be sure that we will not be required to incur significant costs to comply with these laws and regulations in the future or that these laws or regulations will not hurt our business and results of operations. Unanticipated changes in existing regulatory requirements or adoption of new requirements could hurt our business, results of operations and financial condition.

Foreign Regulation

Our products are also regulated outside the United States as medical devices by foreign governmental agencies, similar to the FDA, and are subject to regulatory requirements, similar to the FDA's, in the foreign countries in which we plan to sell our products. Our ALGO products carry a CE Mark for sale in Europe and our ALGO 2E Color carries a TGA approval for sale in Australia. Our facility has been audited and certified to be ISO9001/EN46001 compliant, which allows us to sell our products in Europe. Our facility is subject to CE Mark and ISO 9001 inspection by TUV Rheinland. We plan to seek approval to sell our products in additional countries. The time and cost required to obtain market authorization from other countries and the requirements for licensing a product in another country may differ significantly from FDA requirements.

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Employees

As of June 30, 2000, we had 101 full time employees, including 16 in research and development and related customer support services, 38 in sales, 13 in marketing and 34 in manufacturing, finance and administration. None of our employees are represented by a labor union. We have not experienced any work stoppages and consider our relations with our employees to be good.

Facilities

Our principal offices are located in a leased 26,000 square foot facility in San Carlos, California and house substantially all of our manufacturing, research and development and related customer support services employees, as well as all marketing, administration and finance employees. Our lease on the San Carlos facility expires in December 2003. In addition, we lease a 1,500 square foot service and support center in Cottonwood, California, and our lease for this center expires in December 2001. We expect that our current leased facilities will be sufficient for our needs over the next 12 months, except that we intend to lease a small facility in Tokyo, Japan to support our Asian sales efforts.

Legal Proceedings

We are not currently a party to any material legal proceeding, nor are we aware of any material threatened actions.

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MANAGEMENT

Executive Officers and Directors

The following table shows specific information about our executive officers and directors as of June 30, 2000:

             Name               Age                 Position(s)
------------------------------- --- ------------------------------------------
Tim C. Johnson.................  43 Chief Executive Officer, President, Chief
                                     Operating Officer, Secretary and Director

William New, Jr., M.D, Ph.D. ..  58 Chairman, Chief Technology Officer and
                                     Director

William H. Lawrenson...........  52 Vice President, Finance, Chief Financial
                                     Officer and Assistant Secretary

Terese M. Baker................  41 Vice President, Marketing

Lucille A. Ferus...............  43 Vice President, Engineering

Bryan P. Flaherty, Ph.D. ......  36 Vice President, Research and Development

Thomas Waugh...................  55 Vice President, Operations

James J. Bochnowski............  57 Director

William M. Moore...............  51 Director

David Nierenberg...............  47 Director

Tim C. Johnson has served as our chief executive officer since July 1999, as our president since March 1996, as our chief operating officer since October 1995 and as our secretary since April 1992. Mr. Johnson also was our controller from July 1990 to June 1991 and served as director of finance and administration from July 1991 to March 1992. In April 1992 Mr. Johnson was named vice president of finance and chief financial officer and served in that capacity until December 1997. Prior to joining our company, Mr. Johnson served in various capacities at Cray Research, Inc. and was previously an auditor with Coopers & Lybrand. Mr. Johnson holds a Bachelor of Science degree in Accounting from the University of Minnesota and a Masters of Business Administration degree from Stanford University.

William New, Jr., M.D., Ph.D., one of our co-founders, has served as our chairman, chief technology officer and director since 1987. Dr. New also served as our chief executive officer from 1992 to July 1999. Dr. New served as a member of the clinical anesthesia faculty at Stanford University Medical Center from 1975 to August 2000. Dr. New served as the chairman of the Board of Visitors of the Duke University Medical Center from 1994 to 1998. Dr. New was a co-founder and the chairman of Nellcor Incorporated. Dr. New holds a Bachelor of Science degree and a Masters of Science degree in Engineering from Stanford University, a Doctor of Medicine degree from Duke University and a Doctorate degree in Physiology from the University of California at Los Angeles.

William H. Lawrenson has served as our vice president of finance and chief financial officer since December 1997. Mr. Lawrenson also has served as our assistant secretary since July 2000. Since July 1998, Mr. Lawrenson has also served as president of Saratoga Knowledge Systems, Inc., which he and his wife own. Mr. Lawrenson served as a consultant to IDG Interactive Services, Inc., a wholly owned subsidiary of International Data Group, Inc., a publishing company, from September 1996 to December 1997. From September 1995 to September 1996, Mr. Lawrenson was a vice president and chief operating officer of IDG Interactive Services. From December 1984 to March 1995, Mr. Lawrenson served in various capacities at Dialog Information Services, Inc., an information services company, the most recent of which was as vice president of business development, and he also served as vice president of finance and administration. Mr. Lawrenson is a certified public accountant and a South African chartered accountant. Mr. Lawrenson was educated at the University of Port Elizabeth, South Africa.

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Terese M. Baker has served as our vice president of marketing since January 1998. From April 1996 to January 1998, Ms. Baker served as a director of marketing. Prior to joining our company, Ms. Baker served as director of marketing at River Medical Inc., subsequently acquired by ALARIS Medical Systems, Inc. from May 1993 to October 1995. Ms. Baker served as a director of marketing at Sulzer Calcitek, Inc. from March 1989 to April 1993. From March 1982 to March 1989, Ms. Baker held several management positions in the McGaw division of American Hospital Supply. Ms. Baker holds a Bachelor of Arts degree in Economics from the University of California at Irvine and a Masters of Business Administration degree from Pepperdine University.

Lucille A. Ferus has served as our vice president of engineering since December 1997. Ms. Ferus served as our director of software operations from October 1996 to December 1997. From May 1991 to October 1996, Ms. Ferus served as an engineering manager at Ventritex Corporation, a medical device company. Ms. Ferus was a software engineer at Nellcor from June 1986 to April 1991. From April 1983 to May 1986, Ms. Ferus served as a computer science engineer at Thoratec Laboratories Corporations, a medical device company. Ms. Ferus served as design engineer at Picker/Cambridge Medical from February 1981 to April 1983 and as a project engineer at the Howmedica division or Pfizer, Inc. from January 1979 to February 1981. Ms. Ferus holds a Bachelor of Science degree in Electrical Engineering and a Master of Science degree in Bioengineering from Fairleigh Dickenson University.

Bryan P. Flaherty, Ph.D. has served as our vice president of research and development since February 2000. Dr. Flaherty was our director of research and development from July 1998 to February 2000. Dr. Flaherty served as our manager of advanced product engineering from November 1996 to July 1998. From June 1994 to November 1996, Dr. Flaherty served as a senior development engineer of Vital Insite, Inc., a medical monitoring technology company. From September 1993 to June 1994, Dr. Flaherty served as a consultant at Failure Analysis Associates, an engineering consulting company. From September 1992 to September 1993, Dr. Flaherty served as a staff engineer at Rush Medical College, and from September 1989 to September 1992, he served as a staff engineer at Hines VA Rehabilitation Research and Development Center. Dr. Flaherty holds a Bachelor of Science degree in Mechanical Engineering from the University of California at Davis and Master of Science and Doctorate degrees in Bioengineering from the University of Illinois, Chicago.

Thomas Waugh has served as our vice president of operations since January 2000. Prior to joining our company, Mr. Waugh was vice president of operations of Surface/Interface, Inc., a semiconductor equipment manufacturer from September 1999 to January 2000. From April, 1999 to September 1999, Mr. Waugh worked as an independent consultant. From January 1998 to April 1999, Mr. Waugh served as vice president of manufacturing of VidaMed, Inc., a medical device company. From May 1997 to January 1998, Mr. Waugh served as vice president of operations of ChemTrak, Inc., a medical diagnostics company, and from November 1996 to May 1997, he served as consultant to Tissue Technologies, Inc., a medical laser company. From February 1992 to November 1996, Mr. Waugh served as vice president of operations at American Dental Technologies, Inc. Mr. Waugh holds a Bachelor of Science degree in Electrical Engineering from the University of Colorado, Boulder and a Masters of Science degree in Electrical Engineering from Stanford University.

James J. Bochnowski has served as a director of our company since August 1991. From 1988 to present, Mr. Bochnowski has been a general partner of Delphi Ventures, a venture capital firm, which he co-founded. Mr. Bochnowski has served as a director of Applied Molecular Evolution, Inc. from 1997 to the present. Mr. Bochnowski holds a Bachelor of Science degree in Aerospace Engineering from the Massachusetts Institute of Technology and a Masters of Business Administration degree from Harvard University.

David Nierenberg has served as a director of our company since August 1991. From January 1996 to present, Mr. Nierenberg has been the president of Nierenberg Investment Management Company, Inc., which manages the D3 Family Fund, a private investment partnership. From November 1986 to date, Mr. Nierenberg has been a general partner of six venture funds associated with Trinity Ventures, a venture capital firm. Mr. Nierenberg also sits on the board of Mexican Restaurants, Inc., formerly Casa Ole Restaurants, Inc., an operator and franchiser of restaurants. Mr. Nierenberg holds a Bachelor of Arts degree in History from Yale College and a Doctor of Jurisprudence degree from Yale Law School.

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William M. Moore has served as a director of our company since inception and is one of our co-founders. From April 1989 to May 1992, Mr. Moore served as our chief executive officer. Mr. Moore has served as chief executive officer of MetaSensors, Inc. a medical device company, from February 1997 to present. From June 1992 to January 1997, Mr. Moore was a general partner of Alpine Partners, a venture capital firm. Mr. Moore holds a Bachelor of Science degree in Business from the University of Utah.

Our board of directors currently consists of five members, each of whom is currently subject to election at our annual meeting of stockholders. Upon the closing of this offering, our board of directors will be able to change the number of our directors without the approval of our stockholders. At the time of the closing of this offering, our board of directors will be divided into three classes, with each director serving a three-year term and one class being elected at each year's annual meeting of stockholders. Mr. Bochnowski will be in the class of directors whose initial term expires at the 2001 annual meeting of stockholders. Messrs. Moore and New will be in the class of directors whose initial term expires at the 2002 annual meeting of the stockholders. Messrs. Johnson and Nierenberg will be in the class of directors whose initial term expires at the 2003 annual meeting of stockholders.

Executive officers are elected by the board of directors on an annual basis and serve until their successors have been duly elected and qualified. There are no family relationships among any of our directors, officers or key employees.

Director Compensation

We do not currently pay our directors any cash compensation for their service as members of our board of directors, except for reimbursement for reasonable travel expenses in connection with attendance at board and committee meetings. Under our 1991 stock option plan and our 2000 stock option plan, nonemployee directors are eligible to receive stock option grants at the discretion of the board of directors. After this offering is completed, nonemployee directors will receive stock options pursuant to the automatic option grant program in effect under the 2000 director option plan. See "-- Incentive Stock Plans" for more information about the automatic grant program.

Board of Directors Committees

We have established an audit committee and a compensation committee. Messrs. Bochnowski, Moore and Nierenberg are members of both the audit and the compensation committees.

The audit committee:

. reviews our internal accounting procedures; and

. consults with and reviews the services provided by our independent auditors.

The compensation committee:

. reviews and recommends to the board of directors the compensation and benefits for all of our officers; and

. establishes and reviews general policies relating to compensation and benefits of our other employees.

Compensation Committee Interlocks and Insider Participation

Our board of directors established its compensation committee in September 1991. Prior to establishing the compensation committee, our board of directors as a whole performed the functions delegated to the compensation committee. No interlocking relationship exists between any member of our compensation committee and any member of any other company's board of directors or compensation committee.

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Executive Compensation

The following table sets forth the compensation earned including salary, bonuses, commissions, stock options and other compensation during the fiscal year ended December 31, 1999 by Tim C. Johnson, our chief executive officer, and our four next most highly compensated executive officers, each of whose total annual compensation exceeded $100,000 in 1999. We refer to these officers as our named executive officers elsewhere in this prospectus.

Summary Compensation Table

                                          Annual       Long-term
                                       Compensation   Compensation
                                     ---------------- ------------
                                                       Securities
                                                       Underlying   All Other
        Name and Position(s)          Salary   Bonus    Options    Compensation
------------------------------------ -------- ------- ------------ ------------
Tim C. Johnson...................... $227,558 $   --     14,000       $1,038
 Chief Executive Officer, President,
 Chief Operating Officer, Secretary
 and Director

William New, Jr., M.D., Ph.D. ......  167,192     --        --         5,015
 Chairman, Chief Technology Officer
  and Director

William H. Lawrenson................  144,068     --     26,200          736
 Vice President, Finance and Chief
  Financial Officer

Lucille A. Ferus....................  145,382     --      5,200          766
 Vice President, Engineering

June Fallon(1)......................  135,000  39,504     2,000          796
 Vice President, Sales


(1) Ms. Fallon resigned as our Vice President of Sales in January 2000. The amount in the column titled "Bonus" for Ms. Fallon represents sales commissions.

The amounts in the column titled "All Other Compensation" represent premiums for life insurance paid by us for Messrs. Johnson, New and Lawrenson and Ms. Ferus and Ms. Fallon. The amount for Dr. New includes health insurance premiums for Dr. New's family.

The following summarizes stock options granted to each named executive officer during the year ended December 31, 1999. For grants to the named executive officers in 2000, see "Related Party Transactions--Option Grants to Directors and Executive Officers." All of the options were granted under our 1991 stock option plan. Options under the 1991 stock option plan generally vest ratably monthly over four years.

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Option Grants in Last Fiscal Year

                                     Individual Grants
                         ------------------------------------------
                                                                      Potential
                                                                     Realizable
                                                                        Value
                                                                     at Assumed
                                                                    Annual Rates
                                                                      of Stock
                                    Percent of                          Price
                         Number of    Total                         Appreciation
                         Securities  Options                         for Option
                         Underlying Granted to Exercise                 Term
                          Options   Employees  Price per Expiration -------------
          Name            Granted   in 1999(1) Share(2)     Date      5%    10%
------------------------ ---------- ---------- --------- ---------- ------ ------
Tim C. Johnson..........   14,000      10.3%     $2.25    07/06/09  $      $
William New, Jr., M.D.,
 Ph.D. .................      --        --         --          --
William H. Lawrenson....   20,000      14.7       2.25    05/05/09
                            6,200       4.6       2.25    07/06/09
Lucille A. Ferus........    5,200       3.8       2.25    07/06/09
June Fallon.............    2,000       1.5       2.25    07/06/09


(1) The percents above are based on an aggregate of 135,600 shares subject to options we granted to employees and consultants in the year ended December 31, 1999.

(2) The exercise price per share of each option was equal to the fair market value of the common stock as determined by the board of directors on the date of grant. The potential realizable values assume that the initial public offering price of $ per share was the fair market value of the common stock on the date of grant and that the price of the applicable stock increases from the date of grant until the end of the ten-year option term of the annual rates specified. There is no assurance provided to any holder of our securities that the actual stock price appreciation over the 10 year option term will be at the assumed 5% and 10% levels or at any other defined level.

The following table provides information concerning exercises of options by our named executive officers and the number and value of exercisable and unexercisable options held by the named executive officers as of December 31, 1999.

Aggregate Option Exercises in Last Fiscal Year and Option Values at December 31, 1999

                                                   Number of Securities
                                                  Underlying Unexercised     Value of Unexercised
                                                        Options at          In-the-Money Options at
                           Shares                    December 31, 1999       December 31, 1999(2)
                         Acquired on    Value    ------------------------- -------------------------
          Name            Exercise   Realized(1) Exercisable Unexercisable Exercisable Unexercisable
------------------------ ----------- ----------- ----------- ------------- ----------- -------------
Tim C. Johnson..........   23,111       $          170,181      88,710         $           $
William New, Jr., M.D.,
 Ph.D. .................      --          --       130,000         --                        --
William H. Lawrenson....      --          --        27,669      48,531
Lucille A. Ferus........      --          --        26,523      36,426
June Fallon.............      --          --        12,124      29,876


(1) Assumes that the fair market value at the time of exercise was equal to the assumed initial public offering price of $ per share.

(2) The value of unexercised in-the-money options held at December 31, 1999 represents the total gain which an option holder would realize if he or she exercised all of the in-the-money options held at December 31, 1999, and is determined by multiplying the number of shares of common stock underlying the options by the difference between an assumed initial public offering price of $ per share and the per share option exercise price. An option is in-the-money if the fair market value of the underlying shares exceeds the exercise price of the option.

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Employment Agreements and Change in Control Arrangements

We do not have any employment, noncompete or change in control arrangements or agreements with our current officers that are in effect as of the date of this prospectus. For a description of arrangements with our former officers, directors and five percent stockholders, see "Relationships and Related Party Transactions."

Stock Plans

1991 Stock Option Plan

Our 1991 stock option plan was adopted by our board of directors in July 1991 and approved by our stockholders in August 1991. It was amended most recently in May 2000. A total of 2,393,482 shares of common stock have been reserved for issuance under our 1991 stock option plan and, after the effective date of this offering, we do not intend to grant additional options under the 1991 stock option plan. In July 2000, our board of directors approved the termination of the 1991 stock option plan as to future grants, effective upon the closing of this offering. However, options outstanding under the 1991 stock option plan will continue and will be governed by the terms of the 1991 stock option plan.

The 1991 stock option plan provided for grants of incentive stock options to our employees, including officers and employee directors, and nonstatutory stock options to our consultants including nonemployee directors. The purposes of our 1991 stock option plan were to attract and retain the best available personnel for positions of substantial responsibility, to provide additional incentive to our employees and consultants to our company and to promote the success of our business. At the request of the board of directors, the compensation committee administers our 1991 stock option plan and determines the optionees and the terms of options granted, including the exercise price, number of shares subject to the option and the exercisability of the options.

The term of the options granted under the 1991 stock option plan is set forth in the option agreement. However, the term of an incentive stock option may not exceed ten years and, in the case of an option granted to an optionee who owns more than 10% of our outstanding stock at the time of grant, the term of an option may not exceed five years. Options granted under the 1991 stock option plan vest and become exercisable as set forth in each option agreement.

With respect to any optionee who owns more than 10% of our outstanding stock, the exercise price of any stock option granted must be at least 110% of the fair market value of our common stock on the grant date.

No incentive stock options may be granted to an optionee, which, when combined with all other incentive stock options becoming exercisable in any calendar year that are held by that person, would have an aggregate fair market value in excess of $100,000.

If, within four years after the effective date of this offering, we merge with or into another corporation or sell all or substantially all of our assets and our stockholders before the transaction hold less than 50% of the stock of the corporation surviving such a transaction immediately after the transaction, the surviving corporation may assume the options outstanding under our 1991 stock option plan or substitute equivalent options for those options outstanding. If an optionee's status as an employee is terminated within 12 months after such a transaction other than voluntarily or for cause, that employee's options will accelerate and become fully exercisable. If the optionee's options are not substituted for or assumed by the successor corporation, the options will accelerate and become fully exercisable prior to the closing of the transaction. In the event a transaction like those described above occurs more than four years after the effective date of this offering, the administrator of our 1991 stock option plan has discretion to provide for any of the following:

. the assumption of options or substitution of equivalent options;

. the acceleration of exercisability of options after an assumption or substitution if an optionee's status as an employee is terminated other than voluntarily or for cause within 12 months of the change in control;

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. the termination of the 1991 stock option plan and exercise of options to the extent already vested; and

. the acceleration of any portion or all of the outstanding options.

Notwithstanding these provisions, until we have 800 record holders of our common stock as of the record date for our annual meeting of stockholders, each option under the 1991 stock option plan will be substituted for or assumed by the successor corporation in the event of a change in control. Should the surviving corporation refuse to assume or substitute for outstanding options, the options will terminate on the closing of the change in control transaction.

As of June 30, 2000, we had issued 750,729 shares of common stock upon the exercise of options granted under our 1991 stock option plan, we had outstanding options to purchase 1,326,123 shares of common stock at a weighted average exercise price of $1.09 per share and 316,514 shares remained available for future option grants under our 1991 stock option plan until the closing of this offering.

2000 Stock Option Plan

Our 2000 stock option plan was adopted by our board of directors and approved by our stockholders in July 2000. A total of 1,500,000 shares of common stock have been reserved for issuance under our 2000 stock option plan, together with an annual increase in the number of shares of common stock reserved under the plan beginning on the first day of our fiscal year, commencing January 1, 2002, in an amount equal to the lesser of:

. 1,500,000 shares of common stock;

. 7% of our outstanding shares of common stock on the last day of the prior fiscal year; or

. an amount determined by our board of directors.

As a result of these annual increases, a maximum of 13,500,000 additional shares of common stock could be issued over the ten year life of the 2000 stock option plan.

The 2000 stock option plan provides for grants of incentive stock options to our employees including officers and employee directors and nonstatutory stock options to our consultants including nonemployee directors. The purposes of our 2000 stock option plan are to attract and retain the best available personnel for positions of substantial responsibility, to provide additional incentive to our employees and consultants to our company and to promote the success of our business. At the request of the board of directors, the compensation committee administers our 2000 stock option plan and determines the optionees and the terms of options granted, including the exercise price, number of shares subject to the option and the exercisability thereof.

The term of the options granted under the 2000 stock option plan is set forth in the option agreement. However, the term of an incentive stock option may not exceed ten years and, in the case of an option granted to an optionee who owns more than 10% of our outstanding stock at the time of grant, the term of an option may not exceed five years. Options granted under the 2000 stock option plan vest and become exercisable as set forth in each option agreement.

With respect to any optionee who owns more than 10% of our outstanding stock, the exercise price of any stock option granted must be at least 110% of the fair market value of our common stock on the grant date.

No incentive stock options may be granted to an optionee, which, when combined with all other incentive stock options becoming exercisable in any calendar year that are held by that person, would have an aggregate fair market value in excess of $100,000. In any fiscal year, we may not grant any employee options to purchase more than 1,000,000 shares or 1,500,000 shares in the case of an employee's initial employment.

The 2000 stock option plan will terminate in July 2010, unless our board of directors terminates it sooner.

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If, within four years after the effective date of this offering, we merge with or into another corporation or sell all or substantially all of our assets and our stockholders before the transaction hold less than 50% of the stock of the corporation surviving such a transaction immediately after the transaction, the surviving corporation may assume the options outstanding under our 2000 stock option plan or substitute equivalent options for those options outstanding. If an optionee's status as an employee is terminated other than voluntarily or for cause within 12 months after the transaction, that employee's options will accelerate and become fully exercisable. If the optionee's options are not substituted for or assumed by the successor corporation, the options will accelerate and become fully exercisable prior to the closing of the transaction. In the event a transaction like those described above occurs more than four years after the effective date of this offering, the administrator of our 2000 stock option plan has discretion to provide for any of the following:

. the assumption of options or substitution of equivalent options;

. the acceleration of exercisability of options after an assumption or substitution if an optionee's status as an employee is terminated other than voluntarily or for cause within 12 months of the change in control;

. the termination the 2000 stock option plan and exercise of options to the extent already vested; and

. the acceleration of any portion or all of the outstanding options.

Notwithstanding these provisions, until we have 800 record holders of our common stock as of the record date for our annual meeting of stockholders, each option under the 2000 stock option plan will be substituted for or assumed by the successor corporation in the event of a change in control. Should the surviving corporation refuse to assume or substitute for outstanding options, the options will terminate on the closing of the change in control transaction.

As of June 30, 2000, we had neither granted any options nor issued any shares of common stock upon the exercise of options granted under our 2000 stock option plan, and 1,500,000 shares remain available for future option grants under our 2000 stock option plan.

2000 Employee Stock Purchase Plan

Our 2000 employee stock purchase plan was adopted by our board of directors and our stockholders in July 2000 and will become effective upon the closing of this offering. We have reserved a total of 1,000,000 shares of common stock for issuance under the 2000 employee stock purchase plan, together with an annual increase in the number of shares of common stock reserved under the plan beginning on the first day of our fiscal year commencing January 1, 2002 in an amount equal to the lesser of:

. 650,000 shares of common stock;

. 4% of our outstanding common stock on the last day of the prior fiscal year; or

. an amount determined by our board of directors.

As a result of these annual increases, a maximum of 5,850,000 additional shares of common stock could be sold over the ten year life of the employee stock purchase plan.

Our employee stock purchase plan is administered by the board of directors and is intended to qualify under Section 423 of the Internal Revenue Code. Our employees, including our officers and employee directors but excluding our 5% or greater stockholders, are eligible to participate if they are customarily employed for at least 30 hours per week and for more than five months in any calendar year. With respect to the initial offering period, each of our employees as of the effective date of the offering will be automatically enrolled in the plan with the maximum deduction. Our employees will be permitted to reduce or terminate participation in the employee stock purchase plan after this offering has closed and we have filed a registration statement related to the employee stock purchase plan. Our 2000 employee stock purchase plan permits eligible employees to purchase common stock through payroll deductions, which may not exceed the lesser of 15% of

65

an employee's cash compensation, defined as Form W-2 compensation plus contributions to our 401(k) plan or $25,000 per annum.

Our 2000 employee stock purchase plan will be implemented in a series of overlapping 24 month offering periods, and each offering period consists of four six month purchase periods. The initial offering period under our employee stock purchase plan will begin on the effective date of this offering, and the subsequent offering periods will begin on the first trading day on or after May 1 and November 1 of each year. Each participant will be granted an option on the first day of the offering period and the option will be automatically exercised on the date six months later, the end of a purchase period, throughout the offering period. If the fair market value of our common stock on any purchase date is lower than the fair market value of our common stock on the start date of that offering period, then all participants in that offering period will be automatically withdrawn from that offering period and re- enrolled in the immediately following offering period. The purchase price of our common stock under our 2000 employee stock purchase plan will be 85% of the lesser of the fair market value per share on the start date of the offering period or at the end of the purchase period. Employees may end their participation in an offering period at any time, and their participation ends automatically on termination of employment with our company.

Our 2000 employee stock purchase plan will terminate in July 2010, unless our board of directors terminates it sooner.

2000 Director Option Plan

Our 2000 director option plan was adopted by our board of directors and our stockholders in July 2000 and will become effective upon the effective date of this offering. We have reserved a total of 400,000 shares of common stock for issuance under the 2000 director option plan, together with an annual increase in the number of shares of common stock reserved under the plan beginning on the first day of our fiscal year commencing January 1, 2002 equal to the lesser of:

. 100,000 shares of common stock;

. one-half of one percent of the outstanding shares of our common stock on the last day of the prior fiscal year; or

. an amount determined by the board of directors.

As a result of these annual increases, a maximum of 900,000 additional shares of common stock could be issued over the ten year life of the 2000 director option plan.

The option grants under the 2000 director option plan are automatic and nondiscretionary, and the exercise price of the options is 100% of the fair market value of our common stock on the grant date.

Nonemployee directors are eligible for grants under our 2000 director option plan. The 2000 director option plan provides for an initial grant to a new nonemployee director of an option to purchase 30,000 shares of common stock. Subsequent to the initial grants, each nonemployee director will be granted an option to purchase 10,000 shares of common stock at the next meeting of the board of directors following the annual meeting of stockholders, if on the date of the annual meeting, the director has served on the board of directors for six months.

The term of the options granted under the 2000 director option plan is ten years, but the options expire three months following the termination of the optionee's status as a director or twelve months if the termination is due to death or disability. The initial 30,000 share grants will become exercisable at a rate of 1/36th of the shares per month. The subsequent 10,000 share grants will become exercisable at the rate of 1/12th of the shares per month.

The 2000 director option plan will terminate in July 2010, unless our board of directors terminates it sooner.

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401(k) Plan

In March 1992, we adopted a retirement savings and investment plan, the 401(k) plan, covering our full-time employees located in the United States. The 401(k) plan is intended to qualify under Section 401(k) of the Internal Revenue Code, so that contributions to the 401(k) plan by employees or by us, and the investment earnings on those contributions are not taxable to the employees until withdrawn. If our 401(k) plan qualifies under Section 401(k) of the Internal Revenue Code, our contributions will be deductible by us when made. Our employees may elect to reduce their current compensation by up to the statutorily prescribed annual limit of $10,500 in 2000 and to have those funds contributed to the 401(k) plan. The 401(k) plan permits us, but does not require us, to make additional matching contributions on behalf of all participants. Beginning January 1, 2000, we commenced matching contributions to the 401(k) plan for each participant of up to a maximum of $500 per year.

Limitations on Directors' Liability and Indemnification

Our certificate of incorporation limits the liability of our directors and executive officers for monetary damages for breach of their fiduciary duties to the maximum extent permitted by Delaware law. Delaware law provides that directors of a corporation will not be personally liable for monetary damages for breach of their fiduciary duties as directors, except liability for:

. any breach of their duty of loyalty to our company or our stockholders;

. acts or omissions not in good faith or which involve intentional misconduct or a knowing violation of law;

. unlawful payments of dividends or unlawful stock repurchases or redemptions as provided in Section 174 of the Delaware General Corporation Law; or

. any transaction from which the director derived an improper personal benefit.

The limits on a director or officer's liability in our certificate of incorporation do not apply to liabilities arising under the federal securities laws and do not affect the availability of equitable remedies such as injunctive relief or rescission.

Our certificate of incorporation together with our bylaws provide that we must indemnify our directors and executive officers and may indemnify our other officers and employees and other agents to the fullest extent permitted by law. We believe that indemnification under our bylaws covers at least negligence and gross negligence on the part of indemnified parties. Our bylaws also permit us to secure insurance on behalf of any officer, director, employee or other agent for any liability arising out of his or her actions in that capacity, regardless of whether our bylaws would otherwise permit indemnification. We believe that the indemnification provisions of our certificate of incorporation and bylaws are necessary to attract and retain qualified persons as directors and officers. We also maintain directors' and officers' liability insurance.

Prior to the effective time of this offering, we expect to enter into agreements to indemnify our directors, executive officers and other employees as determined by the board of directors. These agreements will provide for indemnification for related expenses including attorneys' fees, judgments, fines and settlement amounts incurred by any of these individuals in any action or proceeding. We believe that these provisions and agreements are necessary to attract and retain qualified persons as our directors and executive officers.

At present we are not aware of any pending litigation or proceeding involving any director, officer, employee or agent of our company where indemnification will be required or permitted. Nor are we aware of any threatened litigation or proceeding that might result in a claim for indemnification.

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RELATIONSHIPS AND RELATED PARTY TRANSACTIONS

We believe that we have executed all of the transactions set forth below on terms no less favorable to us than we could have obtained from unaffiliated third parties. It is our intention to ensure that all future transactions, including loans, between us and our officers, directors and principal stockholders and their affiliates, are approved by a majority of the board of directors, including a majority of the independent and disinterested members of the board of directors, and are on terms no less favorable to us than those that we could obtain from unaffiliated third parties.

Stock Issuances to our Directors, Officers and Principal Stockholders

In connection with our founding, we issued 320,000 shares of common stock in June 1987 at the then fair market value price of $0.25 per share to two of our founders, Maurizio Liverani and John Porter, for aggregate proceeds of $80,000.

In May 1989, we issued 460,000 shares of common stock at the then fair market value price of $0.50 per share to John Porter, William New, Jr., M.D. and the family trusts of Brian Prinn and William W. Moore, each of whom are our founders, for aggregate proceeds of $230,000.

In December 1989, we issued 160,000 shares of common stock at the then fair market value price of $2.50 to Maurizio Liverani, William New, Jr., M.D., John Porter and the family trusts of Brian Prinn and William M. Moore, each of whom are our founders, for aggregate proceeds of $400,000.

In May and June 1990, we issued 80,000 shares of common stock at the then fair market value price of $5.00 to John Porter, William New, Jr., M.D. and the family trusts of Brian Prinn and William W. Moore, each of whom are our founders, for aggregate proceeds of $400,000.

In December 1990, we issued 94,339 shares of common stock to William New, Jr., M.D. and the family trust of William M. Moore, each of whom are our founders, at the then fair market value price of $5.30 per share for aggregate proceeds of $500,000.

In February 1991, we issued 114,739 shares of common stock at the then fair market value price of $5.30 to William New, Jr., M.D., John Porter and the family trusts of Brian Prinn and William W. Moore, each of whom are our founders, for aggregate proceeds of $608,117.

We reclassified our outstanding common stock as Series A convertible preferred stock in May 1991.

From August 1991 to June 30, 2000, we have issued shares of additional preferred stock in private placement transactions as follows:

. an aggregate of 1,428,683 shares of Series B convertible preferred stock at $1.75 per share in August 1991;

. an aggregate of 2,532,209 shares of Series B convertible preferred stock at $1.75 per share in December 1992;

. an aggregate of 6,228 shares of Series B convertible preferred stock at $1.75 per share in January 1993;

. an aggregate of 375,027 shares of Series C convertible preferred stock at $1.75 per share in June 1995;

. an aggregate of 76,319 shares of Series C convertible preferred stock at $1.75 per share in August 1995;

. an aggregate of 600,000 shares of Series C convertible preferred stock at $1.75 per share and warrants to purchase 1,314,188 shares of Series C convertible preferred stock at a per share exercise price of $1.75 in November 1995;

. an aggregate of 377,222 shares of Series C convertible preferred stock at $1.75 per share and warrants to purchase 471,526 shares of Series C convertible preferred stock at a per share exercise price of $1.75 in March and April 1996; and

. an aggregate of 1,232,392 shares of Series D convertible preferred stock at $3.125 per share in April and May 1997.

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Upon closing of this offering, all shares of outstanding convertible preferred stock will be automatically converted into shares of common stock on a one for one basis. The purchasers of our convertible preferred stock include the following holders of five percent or more of our securities and their affiliated entities, if any, and those stockholders purchased the following securities from us:

                                     Shares of Convertible Preferred Stock
                                -----------------------------------------------
                                                           Warrants to
                                                            Purchase
           Investor             Series A Series B Series C Series C(1) Series D
------------------------------  -------- -------- -------- ----------- --------
Entitles or Persons Affiliated
 with Delphi Ventures:
Delphi Ventures, L.P. ........      --   654,821   94,311    117,890       --
Delphi Ventures II, L.P. .....      --   198,877  219,714    274,644       --
Delphi BioInvestments, L.P. ..      --     2,323      335        419       --
Delphi BioInvestments II,
 L.P. ........................      --     1,123    1,125      1,405       --
James Bochnowski(2)...........      --       --       --         --        --

Entities or Persons Affiliated
 with Trinity Ventures:
Trinity Ventures II, L.P. ....      --   644,261  237,130    296,412       --
Trinity Ventures III, L.P. ...      --   178,367   65,650     82,063       --
Trinity Side-by-Side I,
 L.P. ........................      --    34,518   12,705     15,881       --
David Nierenberg(3)...........      --       --    13,714     17,143       --

Entities or Persons Affiliated
 with Nikko Capital:
Nikko Capital Co. Ltd.........      --       --       --         --     96,000
Nikko Capital No. 2 Investment
 Enterprise Partnership
 (Asia).......................      --       --       --         --    256,000
Nikko Capital No. 7 Investment
 Enterprise Partnership
 (Asia).......................      --       --       --         --    128,000

John Porter or Entities
 Affiliated with John Porter:
John Porter...................   94,703  201,060      --         --        --
Rabobank Nominees Guernsey
 Limited......................  210,000      --       --         --        --
Gracechurch Co. ..............      --       --   114,286    178,572       --
Toxford Corporation SA........      --       --    28,572        --        --

Other Entities or Persons:
Landmark Equity Partners V,
 L.P..........................      --   761,905   38,096     47,619       --
Pantheon International
 Participations...............      --   952,381      --         --        --
William M. Moore and Patricia
 A. Moore, Family Trust.......  217,908   16,684      --         --        --
William New, Jr., M.D.,
 Ph.D. .......................  447,797   74,278  229,710    287,213       --


(1) The Series C convertible preferred stock warrants expired on December 31, 1999 and are no longer outstanding.

(2) Mr. Bochnowski, one of our directors, is a managing member of Delphi Management Partners, L.L.C. and Delphi Management Partners II, L.L.C. Delphi Management Partners, L.L.C. is the general partner of Delphi Ventures, L.P. and Delphi BioInvestments, L.P. Delphi Management Partners II, L.L.C. is the general partner of Delphi Ventures II, L.P. and Delphi BioInvestments II, L.P. Mr. Bochnowski disclaims beneficial ownership of the shares held by each of the entities listed above as affiliated with Delphi Ventures, except to the extent of his pecuniary interest therein.

(3) Mr. Nierenberg, one of our directors, is a general partner of Trinity Ventures II, L.P., Trinity Ventures III, L.P. and Trinity Side-by-Side I, L.P. Mr. Nierenberg disclaims beneficial ownership of the shares held by each of the entities listed above as affiliated with Trinity Ventures, except to the extent of his pecuniary interest therein.

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Option Grants to our Directors and Executive Officers

Stock option grants to our directors and executive officers are described under the captions "Management--Board Compensation" and "--Executive Compensation." From January 1997 to the present, we have granted options to our directors and current executive officers, including the named executive officers as follows:

                                                       Number
                                                         of     Grant   Exercise
Name                                                   Shares    Date    Price
------------------------------------------------------ ------- -------- --------
Tim C. Johnson........................................ 200,000 04/23/97   0.25
                                                        20,000 04/22/98   1.88
                                                        14,000 07/06/99   2.25
                                                       100,000 02/15/00   1.50

William H. Lawrenson..................................  40,000 12/17/97   1.00
                                                        10,000 10/23/98   1.88
                                                        20,000 05/05/99   2.25
                                                         6,200 07/06/99   2.25
                                                        40,000 02/15/00   1.50

Terese M. Baker.......................................  10,000 04/23/97   0.25
                                                        20,000 01/21/98   1.00
                                                        10,000 10/23/98   1.88
                                                         7,200 07/06/99   2.25
                                                         4,000 09/01/99   2.25
                                                        40,000 02/15/00   1.50

Lucille A. Ferus......................................  20,000 12/17/97   1.00
                                                        20,000 03/04/98   1.00
                                                         4,000 10/23/98   1.88
                                                         5,200 07/06/99   2.25
                                                        40,000 02/15/00   1.50

Bryan Flaherty, Ph.D..................................   4,000 04/22/98   1.88
                                                         2,000 10/23/98   1.88
                                                        12,000 07/06/99   2.25
                                                        40,000 02/15/00   1.50

Thomas Waugh..........................................  40,000 01/10/00   1.50
                                                        20,000 02/15/00   1.50

Loans to Executive Officers

In February 1999, in connection with the purchase of his home, we loaned Mr. Johnson $250,000 under a secured, promissory note at the rate of 4.62%, compounded monthly. Mr. Johnson repaid the promissory note in full with interest in March 1999. Upon repayment we provided collateral of $310,000 to a commercial bank against a loan to Mr. Johnson for $250,000, which he had received from that bank. Mr. Johnson pledged 111,111 shares of our common stock that he owns to us to provide us a security interest in the event our $310,000 is not released by the bank. We have no recourse against Mr. Johnson other than the pledged shares in the event he defaults.

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PRINCIPAL STOCKHOLDERS

The following tables set forth information about the beneficial ownership of our common stock as of June 30, 2000, and as adjusted to reflect the sale of shares of common stock in this offering, by:

. each person known to us to be the beneficial owner of more than five percent of our common stock;

. each of our named executive officers;

. each of our directors; and

. all of our directors and executive officers as a group.

Except as otherwise noted below, the address of each beneficial owner noted in the tables is c/o Natus Medical Incorporated, 1501 Industrial Road, San Carlos, California 94070.

We have determined beneficial ownership in accordance with the rules of the Securities and Exchange Commission. Except as indicated by the footnotes below, we believe, based on the information furnished to us, that the persons and entities named in the tables below have sole voting and investment power with respect to all shares of common stock that they beneficially own, subject to applicable community property laws. We have based our calculation of the percentage of beneficial ownership on 9,684,520 shares of common stock outstanding on June 30, 2000 and shares of common stock outstanding upon completion of this offering.

In computing the number of shares of common stock beneficially owned by a person and the percentage ownership of that person, we deemed outstanding shares of common stock subject to options held by that person that are currently exercisable or exercisable within 60 days of June 30, 2000. We did not deem these shares outstanding, however, for the purpose of computing the percentage ownership of any other person. Asterisks represent beneficial ownership of less than one percent.

Executive Officers and Directors

                                                             Percent of Shares
                                                                and Options
                                                                Exercisable
                                                             Within 60 days of
                                                   Options     June 30, 2000
                                     Number of   Exercisable   Beneficially
                                     Shares of     Within          Owned
                                    Common Stock 60 Days of  -----------------
                                    Beneficially  June 30,    Before   After
Name of Beneficial Owner               Owned        2000     Offering Offering
----------------------------------- ------------ ----------- -------- --------
Tim C. Johnson.....................    183,111     187,512      3.8
William New, Jr., M.D., Ph.D. .....    895,451     130,000     10.4
William H. Lawrenson...............        --       46,202       *
Lucille A. Ferus...................     47,050      26,422       *
June Fallon........................        --          --       --      --
James Bochnowski(1)................  1,369,809         --      14.1
William M. Moore(2)................    234,592         --       2.4
David Nierenberg(3)................  1,400,667         --      14.5
All executive officers and
 directors as a group (10
 persons)..........................  4,197,180     432,104     45.8


(1) The beneficial ownership reported for James Bochnowski includes 808,077 shares held by Delphi Ventures, L.P., 555,913 shares held by Delphi Ventures II, L.P., 2,868 shares held by Delphi BioInvestments, L.P. and 2,951 shares held by Delphi BioInvestments II, L.P. Mr. Bochnowski disclaims beneficial ownership of the shares held by these entities except to the extent of his proportional interest in the entities.

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(2) The beneficial ownership reported for Mr. Moore includes 234,592 shares held by Mr. Moore's family trust.

(3) The beneficial ownership reported for David Nierenberg includes 1,029,597 shares held by Trinity Ventures II, L.P., 285,049 shares held by Trinity Ventures III, L.P., 55,164 shares held by Trinity Side-By-Side I, L.P. and 30,857 shares held in Mr. Nierenberg's irrevocable trust. Mr. Nierenberg is a general partner of each of these partnerships. Mr. Nierenberg disclaims beneficial ownership of the shares held by these entities except to the extent of his proportional interest in the entities.

Five Percent or Greater Stockholders

                                                       Percent of Shares
                                                          and Options
                                                      Exercisable Within
                                            Options   60 days of June 30,
                              Number of   Exercisable  2000 Beneficially
                              Shares of     Within           Owned
                             Common Stock 60 Days of  -----------------------
    Name and Address of      Beneficially  June 30,    Before         After
     Beneficial Owner           Owned        2000     Offering      Offering
---------------------------  ------------ ----------- ----------    ---------
Delphi Ventures
 Entities(1)...............   1,369,809        --             14.1%
 3000 Sand Hill Road
 Bldg. 1, Suite 135
 Menlo Park, CA 94025
Trinity Ventures
 Entities(2)...............   1,400,667        --             14.5
 3000 Sand Hill Road
 Bldg. 4, Suite 160
 Menlo Park, CA 94025
Pantheon International
 Participations PLC(3).....     952,381        --              9.8
 23 Cathedral Yard
 Exeter
 Devon EX1 1HB
 England
Landmark Equity Partners V,
 L.P.(4)...................     847,620        --              8.8
 760 Hopemeadow Street
 Simsburg, CT 06070
John Porter Entities(5)....     755,764                        7.8
Nikko Capital Entities(6)..     480,000        --              5.0
 c/o International Division
 2-3, Higashi Gotanda 2-
  chome
 Shinagawa-Ku, Tokyo
 Japan 141


(1) The beneficial ownership reported for the Delphi Venture Entities includes 808,077 shares held by Delphi Ventures, L.P., 555,913 shares held by Delphi Ventures II, L.P., 2,868 shares held by Delphi BioInvestments, L.P. and 2,951 shares held by Delphi BioInvestments II, L.P. Mr. Bochnowski is a general partner of each of these partnerships. Mr. Bochnowski disclaims beneficial ownership of the shares held by these entities except to the extent of his proportional interest in the entities.

(2) The beneficial ownership reported for the Trinity Ventures Entities includes 1,029,597 shares held by Trinity Ventures II, L.P., 285,049 shares held by Trinity Ventures III, L.P., 55,164 shares held by Trinity Side-By-Side I, L.P. and 30,857 shares held in Mr. Nierenberg's irrevocable trust. Mr. Nierenberg is a general partner of each of these partnerships. Mr. Nierenberg disclaims beneficial ownership of the shares held by these entities except to the extent of his proportional interest in the entities.

(3) Pantheon International Participations, PLC is an investment company publicly traded on the London Stock Exchange.

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(4) The general partner of Landmark Equity Partners V, L.P. is Landmark Advisors, Inc.

(5) Includes 295,763 shares held by Mr. Porter, 210,000 shares held by Rabobank Nominees Guernsey Limited, 114,286 shares held by Gracechurch Co. and 135,715 shares held by Toxford SA.

(6) Includes 256,000 shares held by Nikko Capital No. 2 Investment Enterprise Partnership (Asia), 128,000 shares held by Nikko Capital No. 7 Investment Enterprise Partnership (Asia) and 96,000 shares held by Nikko Capital Co. Ltd. Nikko Capital No. 2 and Nikko Capital No. 7 are managed by Nikko Capital Co., Ltd.

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DESCRIPTION OF CAPITAL STOCK

Upon the completion of this offering, we will be authorized to issue 120,000,000 shares of common stock, $0.001 par value, and 10,000,000 shares of undesignated preferred stock, $0.001 par value. The following description of our capital stock does not purport to be complete and is qualified in its entirety by our certificate of incorporation and bylaws, which are included as exhibits to the registration statement of which this prospectus forms a part.

Common Stock

As of June 30, 2000, we had 9,684,520 shares of common stock outstanding held by approximately 168 stockholders of record.

The holders of common stock are entitled to one vote per share on all matters to be voted upon by the stockholders. Subject to preferences that may be applicable to any outstanding preferred stock, the holders of common stock are entitled to receive ratably any dividends that may be declared from time to time by the board of directors out of funds legally available for that purpose. In the event of our liquidation, dissolution or winding up, the holders of common stock are entitled to share ratably in all assets remaining after payment of liabilities, subject to prior distribution rights of preferred stock then outstanding. The common stock has no preemptive or conversion rights or other subscription rights. There are no redemption or sinking fund provisions applicable to the common stock. All outstanding shares of common stock are fully paid and nonassessable, and the shares of common stock to be issued upon the closing of this offering will be fully paid and nonassessable.

Preferred Stock

Upon the closing of this offering, all outstanding shares of our convertible preferred stock will be converted into an aggregate of 8,931,534 shares of common stock. Thereafter, our board of directors will have the authority, without further action by the stockholders, to designate and issue preferred stock in one or more series in order to provide us with flexibility in connection with possible acquisitions and other corporate purposes. The board of directors may also designate the rights, preferences and privileges of each series of preferred stock, any or all of which may be superior to the rights of the common stock. It is not possible to state the actual effect of the issuance of any shares of preferred stock upon the rights of holders of the common stock until the board of directors determines the specific rights of the holders of the preferred stock. However, these effects might include:

. restricting dividends on the common stock;

. diluting the voting power of the common stock;

. impairing the liquidation rights of the common stock; and

. delaying or preventing a change in control of our company without further action by the stockholders.

We have no present plans to issue any shares of preferred stock.

Holders of Registration Rights Can Require Us to Register Shares of Our Stock for Resale

As of June 30, 2000, the holders of 8,832,558 shares of common stock issuable upon the conversion of preferred stock or their permitted transferees are entitled to require us to register their shares under the Securities Act of 1933, as amended. These rights are provided under the terms of our agreement with the holders of registrable securities. Under these registration rights, holders of at least a majority of the then outstanding registrable securities may require on two occasions that we register their shares for public resale. We are obligated to register these shares if the holders of 20% of the eligible shares request registration

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or if the shares to be registered have an anticipated public offering price of at least $7,500,000. In addition, holders of 20% of the registrable securities or holders of a lesser amount, if the anticipated aggregate offering price is at least $1,000,000, may require that we register their shares for public resale on Form S-3 or similar short-form registration, if we are eligible to use Form S-3 or similar short-form registration. If we elect to register any of our shares of common stock for any public offering, the holders of registrable securities are entitled to include shares of common stock in the registration. However, we may reduce the number of shares proposed to be registered in view of market conditions. We will pay all expenses in connection with any registration, other than underwriting discounts and commissions.

Anti-Takeover Effects of Some Provisions of Delaware Law and Our Charter Documents

A number of the provisions of Delaware law and our certificate of incorporation and bylaws could make the acquisition of our company through a tender offer, a proxy contest or other means more difficult and could also make the removal of incumbent officers and directors more difficult. These provisions include the protections of Section 203 of the Delaware Code, as described below, as well as our reservation of 10,000,000 shares of blank check preferred stock and our staggered board of directors. We expect these provisions to discourage coercive takeover practices and inadequate takeover bids and to encourage persons seeking to acquire control of our company to first negotiate with our board of directors. We believe that the benefits provided by our ability to negotiate with the proponent of an unfriendly or unsolicited proposal outweigh the disadvantages of discouraging such proposals. We believe the negotiation of an unfriendly or unsolicited proposal could result in an improvement of its terms.

Delaware Law

We are subject to Section 203 of the Delaware General Corporation Law, an anti-takeover law. In general, Section 203 prohibits a publicly held Delaware corporation from engaging in a "business combination" with an "interested stockholder" for a period of three years following the date the person became an interested stockholder, unless:

. prior to the date of the transaction, the board of directors of the corporation approved either the business combination or the transaction which resulted in the stockholder becoming an interested stockholder;

. the stockholder owned at least 85% of the voting stock of the corporation outstanding at the time the transaction commenced, excluding for purposes of determining the number of shares outstanding

. shares owned by persons who are directors and also officers; and

. shares owned by employee stock plans in which employee participants do not have the right to determine confidentially whether shares held subject to the plan will be tendered in a tender or exchange offer; or

. on or subsequent to the date of the transaction, the business combination is approved by the board and authorized at an annual or special meeting of stockholders, and not by written consent, by the affirmative vote of at least 66 2/3% of the outstanding voting stock which is not owned by the interested stockholder.

Generally, a "business combination" includes a merger, asset or stock sale, or other transaction resulting in a financial benefit to the interested stockholder. An "interested stockholder" is a person who, together with affiliates and associates, owns or, within three years prior to the determination of interested stockholder status, owned 15% or more of a corporation's outstanding voting securities. We expect the existence of this provision to have an anti-takeover effect with respect to transactions our board of directors does not approve in advance. Section 203 may also discourage transactions that might result in a premium over the market price for the shares of common stock held by stockholders.

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Charter Documents

Upon completion of this offering, our certificate of incorporation will provide for our board of directors to be divided into three classes serving staggered terms. Approximately one-third of the board of directors will be elected each year. The provision for a classified board could prevent a party who acquires control of a majority of the outstanding voting stock from obtaining control of the board of directors until the second annual stockholders meeting following the date the acquirer obtains the controlling stock interest. The classified board provision could discourage a potential acquirer from making a tender offer or otherwise attempting to obtain control of our company and could increase the likelihood that incumbent directors will retain their positions. Our certificate of incorporation provides that directors may be removed:

. with cause by the affirmative vote of the holders of at least a majority of the outstanding shares of voting stock; or

. without cause by the affirmative vote of the holders of at least 66 2/3% of the then-outstanding shares of the voting stock.

Our bylaws establish an advance notice procedure for stockholder proposals to be brought before an annual meeting of our stockholders, including proposed nominations of persons for election to the board of directors. At an annual meeting, stockholders may only consider proposals or nominations specified in the notice of meeting or brought before the meeting by or at the direction of the board of directors. Stockholders may also consider a proposal or nomination by a person who:

. was a stockholder of record on the record date for the meeting;

. is entitled to vote at the meeting; and

. has given to our corporate secretary timely written notice, in proper form, of his or her intention to bring that business before the meeting.

The bylaws do not give the board of directors the power to approve or disapprove stockholder nominations of candidates or proposals regarding other business to be conducted at a special or annual meeting of the stockholders. However, our bylaws may have the effect of precluding the conduct of that item of business at a meeting if the proper procedures are not followed. These provisions may also discourage or deter a potential acquirer from conducting a solicitation of proxies to elect the acquirer's own slate of directors or otherwise attempting to obtain control of our company.

Under Delaware law, a special meeting of stockholders may be called by the board of directors or by any other person authorized to do so in our certificate of incorporation or bylaws. The following persons are authorized to call a special meeting of stockholders:

. a majority of our board of directors;

. the chairman of the board;

. the chief executive officer; or

. 30% of our stockholders entitled to vote at the special meeting.

The limitation on the right of our stockholders to call a special meeting will make it more difficult for a stockholder to force stockholder consideration of a proposal over the opposition of the board of directors by calling a special meeting of stockholders. The restriction on the ability of stockholders to call a special meeting also will make it more difficult to replace the board until the next annual meeting.

Although Delaware law provides that stockholders may execute an action by written consent in lieu of a stockholder meeting, it also allows us to eliminate stockholder actions by written consent. Elimination of written consents of stockholders may lengthen the amount of time required to take stockholder actions since actions by written consent are not subject to the minimum notice requirement of a stockholders meeting.

76

However, we believe that the elimination of stockholders written consents may deter hostile takeover attempts. Without the availability of stockholder's actions by written consent, a holder controlling a majority of our capital stock would not be able to amend our bylaws or remove directors without holding a stockholders meeting. The holder would have to obtain the consent of a majority of the board of directors, the chairman of the board or the chief executive officer to call a stockholders meeting and satisfy the notice periods determined by the board of directors. Our certificate of incorporation provides for the elimination of actions by written consent of stockholders upon the closing of this offering.

Transfer Agent and Registrar

The transfer agent and registrar for our common stock is BankBoston, N.A., which is located at 150 Royall Street, Canton, Massachusetts 02021. BankBoston, N.A.'s telephone number is (781) 575-3120.

Nasdaq Stock Market Listing

We have applied to have our common stock listed for quotation on the Nasdaq National Market under the symbol "BABY."

77

SHARES ELIGIBLE FOR FUTURE SALE

Prior to this offering, there has been no public market for our common stock, and no predictions can be made regarding the effect, if any, that market sales of shares or the availability of shares for sale will have on the market price prevailing from time to time. As described below, only a limited number of shares will be available for sale shortly after this offering due to contractual and legal restrictions that apply to resale. Nevertheless, sales of our common stock in the public market after the restrictions lapse, or the perception that such sales may occur, could adversely affect the prevailing market price.

Sales of Restricted Shares and Lock-up Agreements

Upon completion of this offering, we will have an aggregate of shares of common stock outstanding, based upon shares outstanding as of June 30, 2000, assuming no exercise of the underwriters' over-allotment option and no exercise of outstanding options after June 30, 2000. If the underwriter's over-allotment option is exercised in full, we will have an aggregate of shares of common stock outstanding based on 9,684,520 shares outstanding as of June 30, 2000. All of the shares sold in this offering, plus any share sold if the over-allotment option is exercised, will be freely tradable without restriction under the Securities Act, except for any shares purchased by our "affiliates" as that term is defined in Rule 144 under the Securities Act. Affiliates include but are not limited to those persons who hold 10% or more of our outstanding stock, our officers and our directors.

The remaining 9,684,520 shares of common stock outstanding are held by existing stockholders and "restricted" shares as that term is defined in Rule
144. We issued and sold the restricted shares in private transactions in reliance upon exemptions from registration under the Securities Act. Restricted shares may be sold in the public market only if they are registered under the Securities Act or if they qualify for an exemption from registration, such as Rule 144 or 701 under the Securities Act, which are summarized below. Sales of the restricted securities in the public market or the availability of those shares for sale could adversely affect the market price of our common stock.

Our officers, directors, employees and other stockholders, who collectively hold an aggregate of 9,684,520 restricted shares, have entered into lock-up agreements in connection with this offering. These lock-up agreements provide that, with limited exceptions, our officers, directors, employees and stockholders have agreed not to offer, sell, contract to sell, grant any option to purchase or otherwise dispose of any of our common stock or any securities exercisable for or convertible into our common stock, except that they may exercise stock options for a period of 180 days after the effective date of the final prospectus for this offering. Salomon Smith Barney Inc. may, in its sole discretion and at any time without prior notice, release all or any portion of the shares subject to these lock-up agreements. We also have entered into an agreement with Salomon Smith Barney Inc. that we will not offer, sell or otherwise dispose of our common stock until 180 days after the effective date of this offering.

Notwithstanding possible earlier eligibility for sale under the provisions of Rules 144, 144(k) and 701, shares subject to lock-up agreements will not be salable until such agreements expire or are waived by Salomon Smith Barney Inc. Taking into account the lock-up agreements, and assuming Salomon Smith Barney Inc. does not release stockholders from these agreements, beginning 180 days after the effective date, approximately 9,684,520 shares will be eligible for sale.

Following the expiration of the lock-up period, shares issued upon exercise of options granted by us prior to the completion of this offering will also be available for sale in the public market pursuant to Rule 701 under the Securities Act unless those shares are held by one of our affiliates, directors or officers.

78

Rule 144

In general, under Rule 144 as currently in effect, a person, or persons whose shares are aggregated, who has beneficially owned restricted shares for at least one year, including the holding period of any prior owner except an affiliate, would be entitled to sell within any three month period a number of shares that does not exceed the greater of:

. one percent of the number of shares of common stock then outstanding, which will equal approximately shares immediately after this offering; or

. the average weekly trading volume of the common stock during the four calendar weeks preceding the filing of a Form 144 with respect to such sale.

Sales under Rule 144 also are subject to manner of sale provisions that require arm's length sales through a stockbroker, notice requirements with respect to sales by our officers, directors and greater than 5% stockholders and the availability of current public information about us. Under Rule 144(k), a person who is not deemed to have been an affiliate of our company at any time during the six months preceding a sale, and who has beneficially owned the shares proposed to be sold for at least two years including the holding period of any prior owner except an affiliate, is entitled to sell such shares without complying with the manner of sale, public information, volume limitation or notice provisions of Rule 144.

Rule 701

Rule 701, as currently in effect, permits our employees, officers, directors or consultants who purchased shares under a written compensatory plan or contract to resell these shares in reliance upon Rule 144. Rule 701 provides that affiliates may sell their Rule 701 shares under Rule 144 without complying with the holding period requirement and that non-affiliates may sell these shares in reliance on Rule 144 without complying with the holding period, public information, volume limitation or notice provisions of Rule 144.

We intend to file, shortly after the effectiveness of this offering, a registration statement on Form S-8 under the Securities Act covering all shares of common stock reserved for issuance under the stock plans and subject to outstanding options under our 1991 stock option plan and 2000 stock option plan, if any. See "Management--Stock Plans." Shares of common stock issued upon exercise of options under the Form S-8 will be available for sale in the public market, subject to Rule 144 volume limitations applicable to affiliates and subject to the contractual restrictions described above. As of June 30, 2000, options to purchase 1,326,123 shares of common stock were outstanding of which approximately 663,047 options were then vested and exercisable. Beginning on the date that is 180 days after the effective date of this offering, approximately 897,161 shares issuable upon the exercise of vested stock options will become eligible for sale in the public market, if such options are exercised.

Following this offering, the holders of an aggregate of 8,832,558 shares of outstanding common stock as of June 30, 2000, have the right to require us to register their shares for sale upon meeting requirements to which the parties have previously agreed. See "Description of Capital Stock--Holders of Registration Rights Can Require Us to Register Shares of Our Stock for Resale" for additional information regarding registration rights.

79

UNITED STATES TAX CONSEQUENCES TO NON-UNITED STATES HOLDERS

The following is a general discussion of the material United States federal income tax consequences of the ownership and disposition of our common stock to a non-United States holder. As used in this prospectus, the term non-United States holder is a person other than:

. a citizen or individual resident of the United States for United States federal income tax purposes;

. a corporation or other entity taxable as a corporation created or organized in or under the laws of the United States or any political subdivision of the United States;

. an estate whose income is included in gross income for United States federal income tax purposes regardless of its source; or

. a trust, in general, if it is subject to the primary supervision of a court within the United States and which has one or more United States persons who have the authority to control all substantial decisions of the trust.

This discussion does not address all aspects of United States federal income taxation that may be relevant in light of a non-United States holder's particular facts and circumstances, such as being a United States expatriate, and does not address any tax consequences arising under the laws of any state, local or non-United States taxing jurisdiction. Furthermore, the following discussion is based on current provisions of the Internal Revenue Code of 1986, as amended, and administrative and judicial interpretations thereof, all as in effect on the date hereof, and all of which are subject to change, possibly with retroactive effect. Accordingly, each non-United States holder should consult a tax advisor regarding the United States federal, state, local and non-United States income and other tax consequences of acquiring, holding and disposing of shares of our common stock.

Dividends

We have never paid dividends on our capital stock and do not anticipate paying any cash dividends in the foreseeable future. In addition our bank line of credit generally prohibits us from paying cash dividends. In the event, however, that we do pay dividends on our common stock, any dividend paid to a non-United States holder of common stock generally will be subject to United States withholding tax either at a rate of 30% of the gross amount of the dividend or such lower rate as may be specified by an applicable tax treaty. Dividends received by a non-United States holder that are effectively connected with a United States trade or business conducted by the non-United States holder are exempt from such withholding tax. However, those effectively connected dividends, net of certain deductions and credits, are taxed at the same graduated rates applicable to Unites States persons.

In addition to the graduated tax described above, dividends received by a corporate non-United States holder that are effectively connected with a United States trade or business of the corporate non-United States holder may also be subject to a branch profits tax at a rate of 30% or such lower rate as may be specified by an applicable tax treaty.

A non-United States holder of common stock that is eligible for a reduced rate of withholding tax pursuant to a tax treaty may obtain a refund of any excess amounts currently withheld by filing an appropriate claim for refund with the Internal Revenue Service.

Gain on Disposition of Common Stock

A non-United States holder generally will not be subject to United States federal income tax on any gain realized upon the sale or other disposition of our common stock unless:

. the gain is effectively connected with a United States trade or business of the non-United States holder (which gain, in the case of a corporate non-United States holder, must also be taken into account for branch profits tax purposes);

80

. the non-United States holder is an individual who holds his or her common stock as a capital asset (generally, an asset held for investment purposes) and who is present in the United States for a period or periods aggregating 183 days or more during the calendar year in which the sale or disposition occurs and certain other conditions are met; or

. we are or have been a "United States real property holding corporation" for United States federal income tax purposes at any time within the shorter of the five-year period preceding the disposition or the holder's holding period for our common stock. We have determined that we are not and do not believe that we will become a "United States real property holding corporation" for United States federal income tax purposes.

Backup Withholding and Information Reporting

Generally, we must report annually to the IRS the amount of dividends paid, the name and address of the recipient, and the amount, if any, of tax withheld. A similar report is sent to the holder. Pursuant to tax treaties or other agreements, the IRS may make its reports available to tax authorities in the recipient's country of residence.

Dividends paid to a non-United States holder at an address within the United States may be subject to backup withholding at a rate of 31% if the non-United States holder fails to establish that it is entitled to an exemption or to provide a correct taxpayer identification number and other information to the payer. Backup withholding generally will not apply to dividends paid to non- United States holders at an address outside the United States on or prior to December 31, 2000 unless the payer has knowledge that the payee is a United States person. Under recently finalized Treasury Regulations regarding withholding and information reporting, payment of dividends to non-United States holders at an address outside the United States after December 31, 2000 may be subject to backup withholding at a rate of 31% unless such non-United States holder satisfies various certification requirements.

Under current Treasury Regulations, the payment of the proceeds of the disposition of common stock to or through the United States office of a broker is subject to information reporting and backup withholding at a rate of 31% unless the holder certifies its non-United States status under penalties of perjury or otherwise establishes an exemption. Generally, the payment of the proceeds of the disposition by a non-United States holder of common stock outside the United States to or through a foreign office of a broker will not be subject to backup withholding but will be subject to information reporting requirements if the broker is:

. a United States person;

. a "controlled foreign corporation" for United States federal income tax purposes; or

. a foreign person 50% or more of whose gross income for certain periods is from the conduct of a United States trade or business

unless the broker has documentary evidence in its files of the holder's non- United States status and certain other conditions are met, or the holder otherwise establishes an exemption. Neither backup withholding nor information reporting generally will apply to a payment of the proceeds of a disposition of common stock by or through a foreign office of a foreign broker not subject to the preceding sentence.

In general, the recently promulgated final Treasury Regulations, described above, do not significantly alter the substantive withholding and information reporting requirements but would alter the procedures for claiming benefits of an income tax treaty and change the certifications procedures relating to the receipt by intermediaries of payments on behalf of the beneficial owner of shares of common stock. Non-United States holders should consult their tax advisors regarding the effect, if any, of those final Treasury Regulations on an investment in our common stock. Those final Treasury Regulations generally are effective for payments made after December 31, 2000.

Backup withholding is not an additional tax. Rather, the United States income tax liability of persons subject to backup withholding will be reduced by the amount of tax withheld. If withholding results in an overpayment of taxes, a refund may be obtained, provided that the required information is furnished to the IRS.

81

UNDERWRITING

Subject to the terms and conditions of an underwriting agreement, each underwriter named below has severally agreed to purchase, and we have agreed to sell to each underwriter, the number of shares set forth opposite the name of that underwriter.

                                                                     Number
Name                                                                of Shares
----                                                                ---------
Salomon Smith Barney Inc. .........................................
Dain Rauscher Incorporated.........................................
Prudential Securities Incorporated.................................
                                                                      ----
  Total............................................................
                                                                      ====

The underwriting agreement provides that the obligations of the several underwriters to purchase the shares included in this offering are subject to approval of legal matters by counsel and to other conditions. The underwriters are obligated to purchase all the shares of common stock, other than those covered by the over-allotment option described below, if they purchase any of the shares.

The underwriters, for whom Salomon Smith Barney Inc., Dain Rauscher Incorporated and Prudential Securities Incorporated are acting as representatives, propose to offer some of the shares directly to the public at the public offering price set forth on the cover page of this prospectus and some of the shares to dealers at the public offering price less a concession not in excess of $ per share. The underwriters may allow, and the dealers may reallow, a concession not in excess of $ per share on sales to other dealers. If all of the shares are not sold at the initial offering price, the representatives may change the public offering price and the other selling terms. The representatives have advised us that the underwriters do not intend to confirm any sales to any accounts over which they exercise discretionary authority.

We have granted to the underwriters an option, exercisable for 30 days from the date of this prospectus, to purchase up to additional shares of common stock at the public offering price less the underwriting discount. The underwriters may exercise this option solely for the purpose of covering over- allotments, if any, in connection with this offering. To the extent the option is exercised, each underwriter must, subject to specified conditions, purchase a number of additional shares approximately proportionate to that underwriter's initial purchase commitment.

At our request, the underwriters have reserved up to % of the shares to be offered, or shares, as directed shares for sale at the initial public offering price to our directors, officers and employees, as well as to individuals associated with us or our employees, who have advised us of their desire to purchase these shares. This directed share program will be administered by Salomon Smith Barney Inc. The number of shares available for sale to the general public will be reduced to the extent these individuals purchase directed shares. Any directed shares not purchased will be offered by the underwriters to the general public on the same terms as the other shares offered by this prospectus. We have agreed to indemnify the underwriters against some liabilities and expenses, including liabilities under the Securities Act of 1933, in connection with sales of the directed shares.

We, our officers and directors and holders of substantially all of our existing outstanding shares have agreed that, for a period of 180 days from the date of this prospectus, we and they will not, without the prior written consent of Salomon Smith Barney Inc., dispose of or hedge any shares of our common stock or any securities convertible into or exchangeable for common stock. Salomon Smith Barney Inc. in its sole discretion may release any of the securities subject to these lock-up agreements at any time without notice.

Prior to this offering, there has been no public market for our common stock. Consequently, the initial public offering price for our shares will be determined by negotiation among us and the representatives. Among the factors considered in determining the initial public offering price will be our record of operations, our current financial condition, our future prospects, our markets, the economic conditions and future prospects for the industry in which we compete, our management, and currently prevailing general conditions in the equity

82

securities markets, including current market valuations of publicly traded companies considered comparable to us. There can be no assurance, however, that the prices at which our shares will sell in the public market after this offering will not be lower than the price at which they are sold by the underwriters or that an active trading market in our common stock will develop and continue after this offering.

We have applied to have our common stock included for quotation on the Nasdaq National Market under the symbol "BABY."

The following table shows the underwriting discounts and commissions to be paid to the underwriters by us in connection with this offering. These amounts are shown assuming both no exercise and full exercise of the underwriters' option to purchase additional shares of common stock.

                                                          Paid by Natus
                                                    -------------------------
                                                    No Exercise Full Exercise
                                                    ----------- -------------
Per share..........................................    $            $
Total..............................................    $            $

Salomon Smith Barney Inc., on behalf of the underwriters, may purchase and sell shares of common stock in the open market. These transactions may include short-sales, syndicate covering transactions and stabilizing transactions. Short-sales involve syndicate sales of common stock in excess of the number of shares to be purchased by the underwriters in this offering, which creates a syndicate short position. Covered short sales are sales of shares made in an amount up to the number of shares represented by the underwriters' over- allotment option. Transactions to close out the covered syndicate short involve either purchases of the common stock in the open market after the distribution has been completed or the exercise of the over-allotment option. The underwriters may also make "naked" short sales of shares in excess of the over- allotment option. The underwriters must close out any naked short position by purchasing shares of common stock in the open market. A naked short position is more likely to be created if the underwriters are concerned that there may be downward pressure on the price of the shares in the open market after pricing that could adversely affect investors who purchase in the offering. Stabilizing transactions consist of the bids for or purchases of shares in the open market while the offering is in progress.

The underwriters also may impose a penalty bid. Penalty bids permit the underwriters to reclaim a selling concession from an underwriter when Salomon Smith Barney Inc., in covering syndicate short positions or making stabilizing purchases, repurchases shares originally sold by that underwriter.

Any of these activities may cause the price of the common stock to be higher than the price that otherwise would exist in the open market in the absence of these transactions. These transactions may be effected on the Nasdaq National Market or in the over-the-counter market, or otherwise and, if commenced, may be discontinued at any time.

We estimate that the total expenses, excluding underwriting discounts and commissions, payable by us in connection with this offering will be approximately $1,550,000.

Prudential Securities Incorporated facilitates the marketing of new issues online through its PrudentialSecurities.com division. Clients of Prudential Advisor, a full service brokerage firm program, may view offering terms and a prospectus online and place orders through their financial advisors.

The representatives may, from time to time, engage in transactions with and perform services for us in the ordinary course of business.

We have agreed to indemnify the underwriters against certain liabilities, including liabilities under the Securities Act of 1933, or to contribute to payments the underwriters may be required to make in respect of any of those liabilities.

83

LEGAL MATTERS

The validity of the common stock offered hereby will be passed upon for us by Wilson Sonsini Goodrich & Rosati, Professional Corporation, Palo Alto, California. Legal matters specified by the underwriters in connection with this offering will be passed upon for the underwriters by Cravath, Swaine & Moore, New York, New York. Members of Wilson Sonsini Goodrich & Rosati and investment funds associated with that firm hold 46,350 shares of Natus common stock.

EXPERTS

The financial statements as of December 31, 1998 and 1999 and for each of the three years in the period ended December 31, 1999 included in this prospectus and the related financial statement schedule included elsewhere in the registration statement have been audited by Deloitte & Touche LLP, independent auditors, as stated in their reports appearing herein and elsewhere in the registration statement, and have been so included in reliance upon the reports of such firm given upon the authority of such firm as experts in auditing and accounting.

WHERE YOU CAN FIND ADDITIONAL INFORMATION

We have filed a registration statement on Form S-1 with the Securities and Exchange Commission under the Securities Act with respect to the shares of common stock offered in this offering. This prospectus, which is a part of the registration statement, does not contain all of the information set forth in the registration statement, or the exhibits which are part of the registration statement, parts of which are omitted as permitted by the rules and regulations of the Securities and Exchange Commission. For further information about us and the shares of our common stock to be sold in this offering, please refer to the registration statement and the exhibits which are part of the registration statement. Statements contained in this prospectus as to the contents of any contract or any other document are not necessarily complete. Each statement in this prospectus regarding the contents of the referenced contract or other document is qualified in all respects by our reference to the copy filed with the registration statement.

For further information about us and our common stock, we refer you to our registration statement and its attached exhibits, copies of which may be inspected without charge at the Securities and Exchange Commission's public reference room at 450 Fifth Street, N.W., Washington, D.C. 20549 and at the regional offices of the Commission located at Seven World Trade Center, Suite 1300, New York, New York 10048 and Citicorp Center, 500 West Madison Street, Suite 1400, Chicago, Illinois 60661. You can request copies of these documents by writing to the Securities and Exchange Commission and paying a duplicating fee. Please call the Securities and Exchange Commission at 1-800-SEC-0330 for further information about the public reference rooms. The Commission maintains a World Wide Web site on the Internet at http://www.sec.gov that contains reports, proxy and information statements and other information regarding registrants that file electronically with the Commission.

Upon completion of this offering, we will become subject to the information and periodic reporting requirements of the Exchange Act and, in accordance therewith, will file periodic reports, proxy and information statements and other information with the Commission. Our periodic reports, proxy and information statements and other information will be available for inspection and copying at the regional offices, public references facilities and Web site of the Commission referred to above.

We intend to furnish our stockholders with annual reports containing audited financial statements and an opinion thereon expressed by independent certified public accountants. We also intend to furnish other reports as we may determine or as required by law.

84

NATUS MEDICAL INCORPORATED

Index to Financial Statements

                                                                            Page
                                                                            ----
Independent Auditors' Report..............................................  F-2

Balance Sheets as of December 31, 1998 and 1999 and June 30, 2000
 (Unaudited)..............................................................  F-3

Statements of Operations for Each of the Three Years in the Period Ended
 December 31, 1999 and for the Six Months Ended June 30, 1999 and 2000
 (Unaudited)..............................................................  F-4

Statements of Stockholders' Deficit for Each of the Three Years in the
 Period Ended December 31, 1999 and for the Six Months Ended June 30, 2000
 (Unaudited)..............................................................  F-5

Statements of Cash Flows for Each of the Three Years in the Period Ended
 December 31, 1999 and for the Six Months Ended June 30, 1999 and 2000
 (Unaudited)..............................................................  F-6

Notes to Financial Statements.............................................  F-7

F-1

INDEPENDENT AUDITORS' REPORT

To the Board of Directors and Stockholders of Natus Medical Incorporated:

We have audited the accompanying balance sheets of Natus Medical Incorporated (the "Company") as of December 31, 1998 and 1999, and the related statements of operations, stockholders' deficit, and cash flows for each of the three years in the period ended December 31, 1999. These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on these financial statements based on our audits.

We conducted our audits in accordance with auditing standards generally accepted in the United States of America. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements. An audit also includes assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.

In our opinion, such financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 1998 and 1999, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 1999 in conformity with accounting principles generally accepted in the United States of America.

Deloitte & Touche LLP

San Jose, California
March 10, 2000 (August 16, 2000 as to Note 14)

F-2

NATUS MEDICAL INCORPORATED

BALANCE SHEETS
(in thousands, except share amounts)

                                                                       Pro Forma
                                           December 31,                (Note 1)
                                         ------------------  June 30,  June 30,
                                           1998      1999      2000      2000
                                         --------  --------  --------  ---------
                                                                 (unaudited)
ASSETS
Current assets:
 Cash and equivalents..................  $  1,664  $  2,087  $  1,510
 Short-term investments................       279       289       295
 Accounts receivable, net of allowance
  for doubtful accounts of $138 in
  1998, $201 in 1999 and $225 in
  2000.................................     2,807     3,128     3,334
 Inventories...........................     1,180     1,253     1,799
 Prepaid expenses and other current
  assets...............................       241       140       257
                                         --------  --------  --------
   Total current assets................     6,171     6,897     7,195
Property and equipment, net............     1,154     1,277     1,339
Convertible notes receivable...........       --         95       106
Long-term investment...................       --        315       317
Deposits and other assets..............        93       115       102
                                         --------  --------  --------
   Total assets........................  $  7,418  $  8,699  $  9,059
                                         ========  ========  ========

LIABILITIES, CONVERTIBLE PREFERRED
 STOCK AND
STOCKHOLDERS' EQUITY (DEFICIT)
Current liabilities:
 Long-term debt, current portion.......  $    150  $    150  $     75
 Accounts payable......................       959       974       755
 Accrued liabilities...................     1,546     1,526     2,008
 Deferred revenues.....................       310       433       498
                                         --------  --------  --------
   Total current liabilities...........     2,965     3,083     3,336
                                         --------  --------  --------
Long-term debt, net of current
 portion...............................       150       --        --
                                         --------  --------  --------
   Total liabilities...................     3,115     3,083     3,336
                                         --------  --------  --------

Commitments and contingencies (Notes 1,
 6, 9 and 12)..........................

Convertible preferred stock:
 Series A convertible preferred stock,
  $0.001 par value; 1,241,842 shares
  authorized; 1,241,841 shares issued
  and outstanding in 1998, 1999 and
  2000, none pro forma; aggregate
  liquidation value of $3,629 in 1999
  and $3,716 in 2000...................     2,227     2,227     2,227  $    --
 Redeemable convertible preferred
  stock, $0.001 par value; 8,781,412
  shares authorized; outstanding
  shares: aggregate liquidation value
  of $23,794 in 1999 and $24,486 in
  2000 and aggregate redemption value
  of $21,615 in 1999 and $22,307 in
  2000:
   Series B: 3,967,126 shares
    authorized; 3,967,120 shares issued
    and outstanding in 1998, 1999 and
    2000, none pro forma...............    11,050    11,764    12,121       --
   Series C: 3,214,286 shares
    authorized; shares issued and
    outstanding: 1,428,568 in 1998,
    2,490,181 in 1999 and 2000, none
    pro forma..........................     3,168     5,416     5,640       --
   Series D: 1,600,000 shares
    authorized; 1,232,392 shares issued
    and outstanding in 1998, 1999 and
    2000, none pro forma...............     4,151     4,435     4,546       --
   Warrants--Series C redeemable
    convertible preferred stock........       558       --        --        --
                                         --------  --------  --------  --------
   Total convertible preferred stock...    21,154    23,842    24,534       --
                                         --------  --------  --------  --------
Stockholders' equity (deficit):
 Common stock, $0.001 par value;
  120,000,000 shares authorized;
  shares issued and outstanding:
  515,632 in 1998, 597,689 in 1999,
  752,986 in 2000 and 9,684,520 pro
  forma................................       212       278     1,824    26,358
 Deferred stock compensation...........       --        --     (1,122)   (1,122)
 Accumulated deficit...................   (17,063)  (18,504)  (19,513)  (19,513)
                                         --------  --------  --------  --------
   Total stockholders' equity
    (deficit)..........................   (16,851)  (18,226)  (18,811) $  5,723
                                         --------  --------  --------  ========
   Total liabilities, convertible
    preferred stock and stockholders'
    deficit............................  $  7,418  $  8,699  $  9,059
                                         ========  ========  ========

The accompanying notes are an integral part of these financial statements.

F-3

NATUS MEDICAL INCORPORATED

STATEMENTS OF OPERATIONS
(in thousands, except per share amounts)

                                      Years Ended December        Six Months
                                               31,              Ended June 30,
                                     -------------------------  ---------------
                                      1997     1998     1999     1999    2000
                                     -------  -------  -------  ------  -------
                                                                 (unaudited)
Net revenues.......................  $10,031  $15,884  $19,783  $8,918  $11,009
Cost of revenues*..................    3,612    5,577    6,624   3,082    3,908
                                     -------  -------  -------  ------  -------
Gross profit.......................    6,419   10,307   13,159   5,836    7,101
                                     -------  -------  -------  ------  -------
Operating expenses:
  Marketing and selling............    4,259    6,275    7,684   3,654    4,395
  Research and development.........    1,602    2,711    2,457   1,288    1,605
  General and administrative.......    1,231    1,638    2,384   1,021    1,152
  Amortization of deferred stock
   compensation*...................      --       --       --      --       278
                                     -------  -------  -------  ------  -------
    Total operating expenses.......    7,092   10,624   12,525   5,963    7,430
                                     -------  -------  -------  ------  -------
Income (loss) from operations......     (673)    (317)     634    (127)    (329)
Interest income....................      105      116       35      14       17
Interest expense and other.........       (8)       2      (15)     (9)      (5)
                                     -------  -------  -------  ------  -------
Income (loss) before taxes.........     (576)    (199)     654    (122)    (317)
Income tax expense.................      --       --        10     --       --
                                     -------  -------  -------  ------  -------
Net income (loss)..................     (576)    (199)     644    (122)    (317)
Accretion of redeemable convertible
 preferred stock...................    1,292    1,389    2,085     695      692
                                     -------  -------  -------  ------  -------
Net loss available to common
 stockholders......................  $(1,868) $(1,588) $(1,441) $ (817) $(1,009)
                                     =======  =======  =======  ======  =======
Basic and diluted net loss per
 share.............................  $ (7.62) $ (3.63) $ (2.56) $(1.47) $ (1.59)
                                     =======  =======  =======  ======  =======
Shares used in computing basic and
 diluted net loss per share........      245      438      562     557      633
Pro forma basic and diluted net
 loss per share (Note 1)...........                    $ (0.17)         $ (0.11)
                                                       =======          =======
Shares used in computing pro forma
 basic and diluted net loss per
 share (Note 1)....................                      8,478            9,565
*Amortization of deferred stock
 compensation:
  Included in cost of revenues.....  $   --   $   --   $   --   $  --   $    75
                                     =======  =======  =======  ======  =======
  Marketing and selling............  $   --   $   --   $   --   $  --   $    91
  Research and development.........      --       --       --      --        48
  General and administrative.......      --       --       --      --       139
                                     -------  -------  -------  ------  -------
                                     $   --   $   --   $   --   $  --   $   278
                                     =======  =======  =======  ======  =======

The accompanying notes are an integral part of these financial statements.

F-4

NATUS MEDICAL INCORPORATED

STATEMENTS OF STOCKHOLDERS' DEFICIT
(in thousands, except share amounts)

                                Common Stock    Deferred
                               --------------    Stock     Accumulated
                               Shares  Amount Compensation   Deficit    Total
                               ------- ------ ------------ ----------- --------
Balances, January 1, 1997....  114,469 $   63   $   --      $(13,607)  $(13,544)
Accretion to redemption value
 on Series B, C and D
 redeemable convertible
 preferred stock.............                                 (1,292)    (1,292)
Exercise of stock options....  197,352     49                                49
Net loss.....................                                   (576)      (576)
                               ------- ------   -------     --------   --------
Balances, December 31, 1997..  311,821    112       --       (15,475)   (15,363)
Accretion to redemption value
 on Series B, C and D
 redeemable convertible
 preferred stock.............                                 (1,389)    (1,389)
Stock compensation expense...              40                                40
Exercise of options..........  203,811     60                                60
Net loss.....................                                   (199)      (199)
                               ------- ------   -------     --------   --------
Balances, December 31, 1998..  515,632    212       --       (17,063)   (16,851)
Accretion to redemption value
 on Series B, C and D
 redeemable convertible
 preferred stock.............                                 (1,389)    (1,389)
Accretion to redemption value
 of shares issued on exercise
 of warrants on Series C
 redeemable convertible
 preferred stock.............                                   (696)      (696)
Exercise of options..........   82,057     66                                66
Net income...................                                    644        644
                               ------- ------   -------     --------   --------
Balances, December 31, 1999..  597,689    278       --       (18,504)   (18,226)
Accretion to redemption value
 on Series B, C and D
 redeemable convertible
 preferred stock*............                                   (692)      (692)
Deferred stock
 compensation*...............           1,475    (1,475)                    --
Amortization of deferred
 stock compensation*.........                       353                     353
Exercise of stock options*...  155,297     71                                71
Net loss*....................                                   (317)      (317)
                               ------- ------   -------     --------   --------
Balances, June 30, 2000*.....  752,986 $1,824   $(1,122)    $(19,513)  $(18,811)
                               ======= ======   =======     ========   ========


* Unaudited

The accompanying notes are an integral part of these financial statements.

F-5

NATUS MEDICAL INCORPORATED

STATEMENTS OF CASH FLOWS
(in thousands)

                                                                 Six Months
                                                                 Ended June
                                    Year Ended December 31,          30,
                                   ---------------------------  --------------
                                     1997     1998      1999     1999    2000
                                   --------  -------  --------  ------  ------
                                                                 (unaudited)
Operating activities:
 Net income (loss)...............  $   (576) $  (199) $    644  $ (122) $ (317)
 Adjustments to reconcile net
  income (loss) to net cash
  provided by (used in) operating
  activities:
   Depreciation and
    amortization.................       266      357       585     264     346
   Amortization of deferred stock
    compensation.................       --        40       --      --      353
   Writeoff of note receivable...       --       --        200     --      --
   Changes in operating assets
    and liabilities:
     Accounts receivable.........    (1,120)    (689)     (321)    446    (206)
     Inventories.................      (225)    (589)      (73)   (490)   (546)
     Prepaid expenses and other
      assets.....................         9     (115)      101     (76)   (117)
     Accounts payable............       221      329        15     --     (219)
     Accrued liabilities.........       486      568       103     449     547
                                   --------  -------  --------  ------  ------
      Net cash provided by (used
       in) operating activities..      (939)    (298)    1,254     471    (159)
                                   --------  -------  --------  ------  ------
Investing activities:
 Acquisition of property and
  equipment......................      (496)    (900)     (694)   (421)   (395)
 Deposits and other assets.......       (14)     (32)      (36)    --      --
 Purchase of convertible notes
  receivable.....................       --       --        (95)    --      (10)
 Purchase of note receivable.....       --       --       (200)    --      --
 Purchases of short-term
  investments....................      (459)    (547)     (569)   (282)   (295)
 Sales of short-term
  investments....................       390      529       559     282     286
 Purchase of long-term
  investment.....................       --       --       (315)   (312)    --
                                   --------  -------  --------  ------  ------
      Net cash used in investing
       activities................      (579)    (950)   (1,350)   (733)   (414)
                                   --------  -------  --------  ------  ------
Financing activities:
 Issuance of preferred stock.....     3,681      --        --      --      --
 Exercise of warrants on Series C
  preferred stock................       --       --        603     --      --
 Issuance of common stock........        49       60        66      43      71
 Borrowings on bank loans........       --       300       --      --      --
 Payments of borrowings and
  capital lease obligations......      (212)     (10)     (150)    (75)    (75)
                                   --------  -------  --------  ------  ------
      Net cash provided by (used
       in) financing activities..     3,518      350       519     (32)     (4)
                                   --------  -------  --------  ------  ------
Net increase (decrease) in cash
 and equivalents.................     2,000     (898)      423    (294)   (577)
Cash and equivalents, beginning
 of period.......................       562    2,562     1,664   1,664   2,087
                                   --------  -------  --------  ------  ------
Cash and equivalents, end of
 period..........................  $  2,562  $ 1,664  $  2,087  $1,370  $1,510
                                   ========  =======  ========  ======  ======
Noncash investing and financing
 activities:
 Accretion of redeemable
  convertible preferred stock....  $  1,292  $ 1,389  $  2,085  $  695  $  692
 Exercise of warrants, cashless..  $    --   $   --   $    448  $  --   $  --
Supplemental disclosure of cash
 flow information:
 Cash paid for interest..........  $     17  $     1  $     17  $    8  $    6
 Cash paid for income taxes......  $    --   $   --   $      7  $   33  $   28

The accompanying notes are an integral part of these financial statements.

F-6

NATUS MEDICAL INCORPORATED

NOTES TO FINANCIAL STATEMENTS

Years Ended December 31, 1997, 1998 and 1999 and for the Six Months Ended June 30, 1999 (Unaudited) and June 30, 2000 (Unaudited)

1--ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES

Organization

Natus Medical Inc. (the "Company") was incorporated in California in May 1987 (see Note 14), and was formed to design, manufacture and market newborn screening products for the identification and monitoring of common medical disorders that may occur during the critical development period of infants. The Company's main products include (1) the ALGO series, which use automated auditory brainstem technology, or AABR, to enable simple, non-invasive and accurate screening for hearing impairment in newborns and (2) the CO-Stat analyzers which accurately and non-invasively measuring the rate of hemolysis through the detection of carbon monoxide, in exhaled breath. Both the ALGO and CO-Stat products use single-use disposable supplies during the process of screening an infant.

Unaudited Interim Financial Information

The interim financial information as of June 30, 2000 and for the six months ended June 30, 1999 and 2000 is unaudited and has been prepared on the same basis as the audited financial statements. In the opinion of management, such unaudited information includes all adjustments (consisting only of normal recurring adjustments) necessary for a fair presentation of the interim information. Operating results for the six months ended June 30, 2000 are not necessarily indicative of the results that may be expected for the year ending December 31, 2000.

Financial Statement Estimates

The preparation of financial statements in accordance with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Such estimates include allowances for potentially uncollectible accounts receivable, warranty costs, sales returns, and a valuation allowance for deferred tax assets. Actual results could differ from those estimates.

Certain Significant Risks and Uncertainties

Financial instruments that potentially subject the Company to credit risk consist principally of cash and equivalents, investments and accounts and notes receivable. Cash and equivalents and investments consist of cash in bank accounts, money market accounts and certificates of deposit.

The Company sells its products primarily to hospitals and medical institutions and generally does not require its customers to provide collateral or other security to support accounts receivable. The Company maintains allowances for estimated potential bad debt losses. No single customer accounted for more that 10% of accounts receivable at December 31, 1998 or 1999. One customer accounted for 13% of accounts receivable at June 30, 2000. See Note 4 for discussion of the terms of convertible notes receivable.

The Company operates in a dynamic industry and, accordingly, can be affected by a variety of factors. For example, management believes that changes in any of the following areas could have a negative effect on the Company in terms of its future financial position, cash flows and results of operations: ability to obtain additional financing; changes in domestic and international economic and/or political conditions or regulations; fundamental changes in the technology; market acceptance of the Company's products under development; changes in the overall demand for products offered by the Company; successful and timely completion of

F-7

NATUS MEDICAL INCORPORATED

NOTES TO FINANCIAL STATEMENTS--(Continued)

product development efforts; competitive pressures in the form of new product introductions by competitors or price reductions on current products; availability of necessary product components; development of sales channels; litigation or other claims against the Company based on intellectual property, patent, product, regulatory or other factors; and the hiring, training and retention of key employees.

Effective January 1, 2000, the Series B, C and D redeemable convertible preferred stockholders or the Board of Directors may require the Company to redeem such outstanding stock (see Note 6). The aggregate accreted values for the Series B, C and D redeemable convertible preferred stock and the corresponding aggregate redemption value totaled $21,615,000 at December 31, 1999 and $22,307,000 at June 30, 2000. The Company may, at its discretion, elect to pay any redemption obligations in quarterly installments over a three- year period commencing with the date of the redemption notice. In the event redemption is required, the Company may need to seek alternative financing or reduce its operating costs, which could have a negative effect on the Company's future financial position, cash flows and results of operations. In addition, there is no assurance that alternative financing will be available on terms acceptable to the Company or on a timely basis, if at all.

Cash and Equivalents

The Company considers all highly liquid debt instruments purchased with a remaining maturity of three months or less to be cash equivalents.

Short-Term Investments

The Company has classified all of its short-term investments as available- for-sale securities. While the Company's practice is to hold securities to maturity, the Company has classified all securities as available-for-sale securities, as the sale of such securities may be required prior to maturity to implement management strategies. The Company's short-term investments consist of certificates of deposit of $279,000, $289,000 and $295,000 at December 31, 1998 and 1999 and June 30, 2000, respectively, with original maturities ranging between three and six months. Cost, which approximated market value at December 31, 1998 and 1999 and June 30, 2000, is based on the specific identification method for purposes of computing realized gains or losses.

Long-Term Investment

The Company has a $310,000 interest-bearing certificate of deposit with a bank that matures in April 2004. This investment has been assigned to a bank to guarantee a loan on the primary residence of an officer totaling $250,000 plus accrued interest. The sole collateral for such guarantee is 111,111 shares of the Company's common stock that is owned by the officer. Due to this arrangement, the Company has classified the investment as held-to-maturity. The estimated fair value of the long-term investment, using discounted cash flows is approximately $272,000 at December 31, 1999.

Fair Value of Financial Instruments

The Company's financial instruments include cash and equivalents, investments, accounts receivable, convertible notes receivable and debt obligations. The recorded carrying amounts of cash equivalents, short-term investments and accounts receivable approximate their fair value due to their short-term maturities. The recorded amount of the Company's debt obligations approximate their estimated fair value due to their variable interest rates. At December 31, 1999, the difference between estimated fair value and amortized cost for the convertible notes receivable was not significant.

F-8

NATUS MEDICAL INCORPORATED

NOTES TO FINANCIAL STATEMENTS--(Continued)

Inventories

Inventories are stated at the lower of standard cost, which approximates actual cost on a first-in, first-out basis, or market.

Property and Equipment

Property and equipment are stated at cost. Depreciation is computed using the straight-line method over estimated useful lives of three to five years. Equipment under capital leases and leasehold improvements are amortized over the shorter of the lease term or the estimated useful life.

Patent Costs

The Company capitalizes direct costs associated with obtaining and filing patents. Such costs are amortized to expense over five years on a straight-line basis. At December 31, 1998 and 1999, capitalized patent costs, which are included in deposits and other assets in the accompanying balance sheets, totaled $108,000 and $145,000, respectively, and accumulated amortization totaled $46,000 and $60,000, respectively. During 1997, 1998 and 1999, the Company recorded amortization expense in association with capitalized patent costs of $10,000, $10,000 and $14,000, respectively.

Long-Lived Assets

The Company reviews for the impairment of long-lived assets whenever events or changes in circumstances indicate that the carrying amount of that asset may not be recoverable. When the sum of the undiscounted future net cash flows expected to result from the use of the asset and its eventual disposition is less than its carrying amount, an impairment loss would be measured based on the discounted cash flows compared to the carrying amount. No impairment charge has been recorded in any of the periods presented.

Revenue Recognition

The Company recognizes revenue from product sales upon shipment. A provision for estimated warranty costs and sales returns is recorded at the time of sale. Revenues from extended warranty contracts are recognized ratably over the warranty period. Advance payments from customers are recorded as deferred revenue until shipment of the related product.

Research and Development

Costs incurred in research and development are charged to operations as incurred.

Income Taxes

Deferred tax assets and liabilities are recorded for the expected future tax consequences of temporary differences between the financial statement carrying amounts and the tax bases of assets and liabilities. A valuation allowance is recorded to reduce net deferred tax assets to amounts that are more likely than not to be realized.

Stock-Based Compensation

The Company accounts for stock-based awards to employees using the intrinsic value method in accordance with Accounting Principles Board ("APB") No. 25, Accounting for Stock Issued to Employees. The

F-9

NATUS MEDICAL INCORPORATED

NOTES TO FINANCIAL STATEMENTS--(Continued)

Company accounts for stock-based awards to nonemployees in accordance with Statement of Financial Accounting Standards ("SFAS") No. 123, Accounting for Stock-Based Compensation and Emerging Issues Task Force ("EITF") Issue No. 96- 18, Accounting for Equity Instruments That Are Issued to Other Than Employees for Acquiring, or in Conjunction with Selling, Goods or Services.

Comprehensive Income (Loss)

In accordance with SFAS No. 130, Reporting Comprehensive Income, the Company is required to report by major components and as a single total, the change in its net assets during the period from nonowner sources. Comprehensive income
(loss) was the same as net income (loss) for all periods presented.

Net Loss per Share

Basic net loss per common share excludes dilution and is computed by dividing net loss available to common stockholders by the weighted average number of common shares outstanding during the respective period. Diluted net loss per share was the same as basic net loss per share for all periods presented since the effect of any potentially dilutive securities is excluded as they are anti-dilutive (see Note 8).

Unaudited Pro Forma Net Loss per Share

Pro forma basic and diluted net loss per share is computed by dividing net loss available to common stockholders by the weighted average number of common shares outstanding for the period and the weighted average number of common shares resulting from the assumed conversion of all outstanding shares of convertible preferred stock, which will occur upon the closing of the initial public offering contemplated by the Company.

Unaudited Pro Forma Information

The unaudited pro forma balance sheet presents the Company's balance sheet as if the automatic conversion upon the closing of an initial public offering of each share of convertible preferred stock into one share of common stock had occurred at June 30, 2000.

Recently Issued Accounting Standards

In June 1998, the Financial Accounting Standards Board issued SFAS No. 133, Accounting for Derivative Instruments and Hedging Activities, which defines derivatives and requires all derivatives be carried at fair value, and provides for hedge accounting when certain conditions are met. SFAS No. 133 is effective for the Company in fiscal year 2001. The Company has not yet completed its assessment of the effect, if any, this statement will have on its financial position or results of operations.

In December 1999, the Securities and Exchange Commission ("SEC") issued Staff Accounting Bulletin ("SAB") No. 101, Revenue Recognition in Financial Statements, which summarizes certain of the SEC Staff's views in applying accounting principles generally accepted in the United States of America to revenue recognition in the financial statements. The Company has not yet completed its assessment of the effect, if any, this SAB will have on its financial position or results of operations.

F-10

NATUS MEDICAL INCORPORATED

NOTES TO FINANCIAL STATEMENTS--(Continued)

2--INVENTORIES

Inventories consist of (in thousands):

                                                    December 31,
                                                    -------------  June 30,
                                                     1998   1999     2000
                                                    ------ ------ -----------
                                                                  (Unaudited)
Raw materials and subassemblies.................... $  592 $  469   $1,098
Finished goods.....................................    588    784      701
                                                    ------ ------   ------
  Total............................................ $1,180 $1,253   $1,799
                                                    ====== ======   ======

3--PROPERTY AND EQUIPMENT

Property and equipment consist of (in thousands):

                                                December 31,
                                               ----------------   June 30,
                                                1998     1999       2000
                                               -------  -------  -----------
                                                                 (Unaudited)
Furniture and equipment....................... $   876  $ 1,179    $ 1,038
Computer software and equipment...............     870    1,061        983
Demonstration and loaned equipment............     777      970        688
Leasehold improvements........................      82       88        222
                                               -------  -------    -------
                                                 2,605    3,298      2,931
Accumulated depreciation and amortization.....  (1,451)  (2,021)    (1,592)
                                               -------  -------    -------
  Total....................................... $ 1,154  $ 1,277    $ 1,339
                                               =======  =======    =======

4--NOTES RECEIVABLE

During 1999, the Company agreed to loan up to $115,000 in the form of convertible notes to a foreign distributor. During 1999 and January 2000, the Company advanced $95,000 and $10,000, respectively, under such commitment. The remaining $10,000 installment available during April 2000 was not drawn by the foreign distributor. The notes bear interest at a fixed rate of 7%, and all outstanding principal and interest related thereto is due in June 2002. The notes are secured by substantially all of the assets of the foreign distributor and at the Company's sole discretion, at any time prior to repayment of all principal and interest, can be converted into a 19.9% equity interest in the foreign distributor.

During 1999, the Company agreed to loan $200,000 to a private company which included an exclusive, three month option to purchase substantially all of the assets of that company. The Company elected not to pursue the acquisition, and subsequently the private company defaulted on the promissory note, which was written off as it was deemed uncollectible.

F-11

NATUS MEDICAL INCORPORATED

NOTES TO FINANCIAL STATEMENTS--(Continued)

5--ACCRUED LIABILITIES

Accrued liabilities consist of (in thousands):

                                                    December 31,
                                                    -------------  June 30,
                                                     1998   1999     2000
                                                    ------ ------ -----------
                                                                  (Unaudited)
Compensation and related benefits.................. $  685 $  758   $  885
Warranty reserve...................................    500    487      566
Other..............................................    361    281      557
                                                    ------ ------   ------
  Total............................................ $1,546 $1,526   $2,008
                                                    ====== ======   ======

6--CONVERTIBLE PREFERRED STOCK

At December 31, 1999, the Company had outstanding 1,241,841; 3,967,120; 2,490,181 and 1,232,392 shares of Series A convertible preferred stock and Series B, C and D redeemable convertible preferred stock, respectively. Changes in each class of convertible preferred stock from January 1, 1997 to June 30, 2000 are as follows (in thousands):

                                                    Warrants on
                                    --------------------------------------------
                                    Series Series  Series Series Series
                                      A       B      C      D      C      Total
                                    ------ ------- ------ ------ ------  -------
Balances, January 1, 1997.......... $2,227 $ 9,622 $2,385 $  --  $ 558   $14,792
Issuance of 1,232,392 shares of
 Series D redeemable convertible
 preferred stock (less issuance
 costs of $171,000)................                        3,681           3,681
Accretion to redemption value on
 Series B, C and D redeemable
 convertible preferred stock.......            714    391    187           1,292
                                    ------ ------- ------ ------ -----   -------
Balances, December, 31, 1997.......  2,227  10,336  2,776  3,868   558    19,765
Accretion to redemption value on
 Series B, C and D redeemable
 convertible preferred stock.......            714    392    283           1,389
                                    ------ ------- ------ ------ -----   -------
Balances, December, 31, 1998.......  2,227  11,050  3,168  4,151   558    21,154
Issuance of 344,652 shares of
 Series C redeemable convertible
 preferred stock upon exercise of
 warrants for cash.................                   713         (110)      603
Issuance of 716,961 shares of
 Series C redeemable convertible
 preferred stock upon exercise of
 warrants, cashless--net of shares
 tendered at $3.50 per share.......                   448         (448)      --
Accretion to redemption value of
 shares issued on exercise of
 warrants on Series C redeemable
 convertible preferred stock.......                   696                    696
Accretion to redemption value on
 Series B, C and D redeemable
 convertible preferred stock.......            714    391    284           1,389
                                    ------ ------- ------ ------ -----   -------
Balances, December, 31, 1999.......  2,227  11,764  5,416  4,435   --     23,842
Accretion to redemption value on
 Series B, C and D redeemable
 convertible preferred stock*......            357    224    111   --        692
                                    ------ ------- ------ ------ -----   -------
Balances, June 30, 2000*........... $2,227 $12,121 $5,640 $4,546 $ --    $24,534
                                    ====== ======= ====== ====== =====   =======


* Unaudited

Significant terms of the Series A, B, C and D convertible preferred stock ("preferred stock") are as follows:

. Each share of Series A, B, C and D preferred stock is convertible into one share of common stock (subject to certain events of dilution). Shares will automatically be converted upon a public offering of common stock in which the offering price is at least $6.75 per share and the aggregate offering proceeds exceed $7,500,000.

F-12

NATUS MEDICAL INCORPORATED

NOTES TO FINANCIAL STATEMENTS--(Continued)

. The Series B, C and D preferred stock are redeemable at the request of the holders of not less than two-thirds of the then outstanding shares of Series B, C and D preferred stock, or at the option of the Board of Directors, by paying cash equal to $1.75, $1.75 and $3.13 per share of Series B, C and D preferred stock, together with all cumulative dividends and all declared and unpaid dividends as of the date of redemption. The cumulative dividends for the Series B, C and D redeemable preferred stock are accreted annually so that the carrying value will equal the mandatory redemption amount on January 1, 2000 and thereafter. In addition, differences between the redemption amount and the net proceeds received (i.e., the costs of financing) are being accreted. The redemption amount of Series B, C and D preferred stock at December 31, 1999, including cumulative dividends, was $11,764,000, $5,416,000 and $4,435,000, respectively.

. Each share of preferred stock has the same voting rights as the common stock into which it is convertible.

. Dividends may be declared at the discretion of the Board of Directors and are cumulative. Per annum dividends of $0.14, $0.18, $0.18 and $0.18 for each share of Series A, B, C and D preferred stock, respectively, must be declared and paid before any dividends on common stock may be declared or paid. Series B, C and D are payable in preference and priority to Series A, and Series A is payable in preference and priority to common stock. Dividends in arrears for Series A preferred stock at December 31, 1999 were $1,456,000. Cumulative dividends for Series B, C and D preferred stock at December 31, 1999 of $4,821,000, $1,058,000, and $584,000, respectively, have been accreted as noted above.

. In the event of liquidation, dissolution or winding up of the Company, including a sale of substantially all of the Company's assets on a change in control, the Series D preferred stockholders are entitled to receive $3.13 per share, the Series C preferred stockholders are entitled to receive $2.63 per share, the Series B preferred stockholders are entitled to receive $1.75 per share, the Series A preferred stockholders are entitled to receive $1.75 per share, and common stockholders are entitled to $0.25 per share, plus all cumulative dividends, respectively. The distribution to Series C and Series D preferred stockholders is payable in preference and priority to Series B preferred stockholders, the distribution to Series B preferred stockholders is payable in preference and priority to Series A preferred stockholders, and the distribution to Series A preferred stockholders is payable in preference and priority to the distribution to common stockholders. After such payments have been made, any remaining assets of the Company will be distributed pro rata among all stockholders, based on the number of common shares held by each, assuming conversion of all Series A, B, C and D preferred stock at the then applicable conversion rate.

In connection with the issuance of Series C preferred stock, warrants were issued to purchase 1,785,714 shares of Series C preferred stock. The warrants were exercisable at $1.75 per share through December 31, 1999 and were valued at an aggregate of $558,000. During December 1999, 344,652 warrants were exercised for cash proceeds of $603,000; 1,433,810 warrants were exercised by net settlement in a noncash transaction resulting in the issuance of 716,961 shares, and 7,252 warrants lapsed. Additional accretion of $696,000 was recorded upon issuance of the 1,061,557 shares of such Series C preferred stock to record the carrying value at the related redemption amount.

7--STOCKHOLDERS' DEFICIT

Common Stock

At December 31, 1999, the Company had reserved an aggregate of 10,129,468 shares of common stock of which 8,931,534 shares are reserved for conversion of convertible preferred stock and 1,197,934 shares are reserved for issuance and exercise of stock options.

F-13

NATUS MEDICAL INCORPORATED

NOTES TO FINANCIAL STATEMENTS--(Continued)

Stock Option Plan

At December 31, 1999, under the Company's 1991 stock option plan (the "Plan"), incentive and nonstatutory stock options to purchase up to 1,793,482 shares of common stock (see Note 14), may be issued at not less than the fair market value of the stock at the date of grant, as determined by the Board of Directors. Options issued under the Plan become exercisable as determined by the Board of Directors and expire no more than ten years after the date of grant. Most options vest ratably over four years. However, for those optionees who, at the time the option is granted, own stock representing more than 10% of the voting power of all classes of stock of the Company, stock options may be issued at not less than 110% of the fair market value of the stock at the date of grant, and the options expire five years after the date of grant.

A summary of option activity is as follows:

                                                                     Weighted
                                                                     Average
                                                          Number of  Exercise
                                                           Shares     Price
                                                          ---------  --------
Outstanding, January 1, 1997 (389,939 exercisable at a
 weighted average exercise price of $0.25 per share)....    778,080   $0.25
  Granted (weighted average fair value of $0.13 per
   share)...............................................    442,480   $0.43
  Exercised.............................................   (197,352)  $0.25
  Cancelled.............................................    (11,712)  $0.25
                                                          ---------
Outstanding, December 31, 1997 (397,476 exercisable at a
 weighted average exercise price of $0.28 per share)....  1,011,496   $0.33
  Granted (weighted average fair value of $0.55 per
   share)...............................................    306,060   $1.65
  Exercised.............................................   (203,811)  $0.30
  Cancelled.............................................    (32,754)  $0.53
                                                          ---------
Outstanding, December 31, 1998 (471,583 exercisable at a
 weighted average exercise price of $0.45 per share)....  1,080,991   $0.68
  Granted (weighted average fair value of $0.73 per
   share)...............................................    135,600   $2.25
  Exercised.............................................    (82,057)  $0.80
  Cancelled.............................................    (40,904)  $1.63
                                                          ---------
Outstanding, December 31, 1999 (668,006 exercisable at a
 weighted average exercise price of $0.58 per share)....  1,093,630   $0.85
  Granted (weighted average fair value of $3.57 per
   share)*..............................................    451,100   $1.53
  Exercised* ...........................................   (155,297)  $0.46
  Cancelled*............................................    (63,310)  $1.85
                                                          ---------
Outstanding, June 30, 2000 (1,111,850 exercisable at a
 weighted average exercise price of $0.68 per share)*...  1,326,123   $1.09
                                                          =========


* Unaudited

F-14

NATUS MEDICAL INCORPORATED

NOTES TO FINANCIAL STATEMENTS--(Continued)

The following table summarizes information concerning outstanding and exercisable options outstanding at December 31, 1999:

                                          Weighted
                                           Average
                                          Remaining
                                         Contractual
Exercise           Number                   Life                   Number
 Price           Outstanding               (Years)               Exercisable
--------         -----------             -----------             -----------
$ 0.25              638,917                  5.5                   506,221
$ 1.00              141,801                  8.0                    70,101
$ 1.88              180,512                  8.7                    68,412
$ 2.25              132,400                  9.5                    23,272
                  ---------                                        -------
                  1,093,630                  6.8                   668,006
                  =========                                        =======

At December 31, 1999 and June 30, 2000, options to purchase 104,304 and 316,514 shares, respectively, were available for future grants under the Plan.

Deferred Stock Compensation

During the six-month period ended June 30, 2000, the Company issued 443,100 common stock options to employees at a weighted average exercise price of $1.53 per share, which was less than the deemed weighted average fair value of $4.77 per share. The cumulative deferred stock compensation with respect to these grants totaled $1,438,000 and is being amortized to expense on a graded vesting method over the four-year vesting period of the options through June 2004.

During 1998 and for the six months ended June 30, 2000, the Company issued fully vested options to nonemployees for the purchase of 43,400 and 8,000 shares of common stock at a weighted average exercise price of $1.55 and $1.50 per share, respectively. Such options were issued for services rendered and the Company expensed the fair value of such awards on the date of grant as deferred stock compensation of $40,000 and $37,000 for the year ended December 31, 1998 and the six months ended June 30, 2000, respectively. The Black-Scholes option pricing model was used to determine the fair value with the following weighted average assumptions: contractual life of 5.5 years for 1998 and 10 years for the six months ended June 30, 2000; risk-free interest rate of 5.3% for 1998 and 6.6% for the six months ended June 30, 2000; expected volatility factor of 75% for 1998 and for the six months ended June 30, 2000.

Amortization of employee and nonemployee stock-based compensation totaled $353,000 for the six months ended June 30, 2000.

Additional Stock Plan Information

Although the Company continues to account for its stock-based awards to employees using the intrinsic value method in accordance with APB No. 25, SFAS No. 123 requires the disclosure of pro forma net income (loss) as if the Company had adopted the fair value method. Under SFAS No. 123, the fair value of stock-based awards to employees is calculated through the use of the option pricing models, even though such models were developed to estimate the fair value of freely tradable, fully transferable options without vesting restrictions, which differ significantly from the Company's stock option awards. The models also require subjective assumptions, including expected time to exercise, which greatly affect the calculated values. The weighted average fair value of the Company's stock-based awards to employees was estimated using the minimum value method with the following weighted average assumptions:
expected life of 5.5 years from the date of grant in 1997, 1998 and 1999; risk free interest rate of approximately 6.0% in 1997, 1998 and 1999; and no dividends during the expected term. The Company's calculations are based on a multiple option valuation approach and forfeitures are recognized as they occur.

F-15

NATUS MEDICAL INCORPORATED

NOTES TO FINANCIAL STATEMENTS--(Continued)

If the computed fair values of the Company's awards had been amortized to expense over the related vesting periods, pro forma net loss and net loss per share, basic and diluted, would have been as follows (in thousands):

                                                   Years Ended December
                                                            31,
                                                  -------------------------
                                                   1997     1998     1999
                                                  -------  -------  -------
Net loss available to common stockholders:
  As reported.................................... $(1,868) $(1,588) $(1,441)
  Pro forma...................................... $(1,901) $(1,667) $(1,544)
Basic and diluted net loss per share:
  As reported.................................... $ (7.62) $ (3.63) $ (2.56)
  Pro forma...................................... $ (7.76) $ (3.81) $ (2.75)

8--NET LOSS PER SHARE

During 1997, 1998 and 1999 and for the six months ended June 30, 1999 and 2000, the Company had securities outstanding which could potentially dilute basic earnings per share in the future, but were excluded in the computation of diluted net loss per share in the periods presented, as their effect would have been antidilutive. Such outstanding securities consist of the following:

                                    December 31,                 June 30,
                          -------------------------------- ---------------------
                             1997       1998       1999       1999       2000
                          ---------- ---------- ---------- ---------- ----------
                                                                (unaudited)
Convertible preferred
 stock..................   7,869,921  7,869,921  8,931,534  7,869,925  8,931,534
Warrants for convertible
 preferred stock........   1,785,714  1,785,714        --   1,785,714        --
Stock options...........   1,011,496  1,080,991  1,093,630  1,063,268  1,326,123
                          ---------- ---------- ---------- ---------- ----------
  Total.................  10,667,131 10,736,626 10,025,164 10,718,907 10,257,657
                          ========== ========== ========== ========== ==========

9--LEASES

The Company has entered into noncancelable operating leases for its facilities through December 2003. Minimum lease payments under noncancelable operating leases as of December 31, 1999 are as follows (in thousands):

                                                                    Operating
                                                                     Leases
                                                                    ---------
Year Ending December 31,
  2000.............................................................  $  456
  2001.............................................................     557
  2002.............................................................     574
  2003.............................................................     593
                                                                     ------
  Total minimum lease payments.....................................  $2,180
                                                                     ======

Rent expense is recorded on a straight-line basis and totaled approximately $189,000 in 1997, $238,000 in 1998 and $413,000 in 1999.

10--BORROWING ARRANGEMENTS

The Company had a $1,000,000 revolving bank line of credit through March 2000. In addition, the Company financed the expansion of its information system during 1998 with a two-year note under an extension of its existing bank facility in the amount of $300,000. The remaining principal balance outstanding at December 31, 1999 of $150,000 will be repaid in monthly installments through December 2000. Borrowings

F-16

NATUS MEDICAL INCORPORATED

NOTES TO FINANCIAL STATEMENTS--(Continued)

under the line of credit are limited to eligible accounts receivable, collateralized by substantially all of the Company's assets and bear interest at the bank's prime rate (9.5% at December 31, 1999) plus 1.0%. The Company must meet certain financial ratios to maintain the line of credit, including minimum tangible net worth, a minimum quick ratio, and total debt to tangible net worth ratio. It also must meet certain operating profitability requirements. At December 31, 1999, the Company was in compliance with all such requirements of the borrowing arrangement.

11--INCOME TAXES

Income tax expense during 1999 represents current state taxes. Deferred income taxes consist of net operating loss and tax credit carryforwards as well as the net tax effects of temporary differences between the carrying amount of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. Net deferred income tax assets are as follows (in thousands):

                                                             December 31,
                                                            ----------------
                                                             1998     1999
                                                            -------  -------
Net deferred tax assets:
  Net operating loss carryforwards......................... $ 3,278  $ 2,956
  Accruals deductible in different periods.................     626      605
  Capitalized research and development costs...............     281      268
  Credit carryforwards.....................................     375      370
                                                            -------  -------
    Total net deferred tax assets..........................   4,560    4,199
Valuation allowance........................................  (4,560)  (4,199)
                                                            -------  -------
    Total.................................................. $   --   $   --
                                                            =======  =======

Due to the uncertainty surrounding the realization of its deferred tax assets, the Company has established valuation allowances sufficient to fully reserve its net deferred tax assets. Annually, management evaluates the recoverability of the deferred tax assets and the level of the valuation allowance. At such time as it is determined that it is more likely than not that deferred tax assets are realizable, the valuation allowance will be reduced.

The Company's amount of income tax recorded differs from the amount using the federal statutory rate as follows (in thousands):

                                                 Years Ended December 31,
                                                ----------------------------
                                                  1997      1998      1999
                                                --------  --------  --------
Federal statutory tax expense (benefit)........ $   (202) $    (70) $    229
State tax expense (benefit)....................      (33)      (11)       38
Valuation allowance............................      258       193      (361)
Other..........................................      (23)     (112)      104
                                                --------  --------  --------
                                                $    --   $    --   $     10
                                                ========  ========  ========

At December 31, 1999, the Company had federal net operating loss carryforwards of approximately $8,447,000 available to reduce future taxable income. Such carryforwards expire beginning in 2002 through 2012. At December 31, 1999, the Company had research and experimentation credit carryforwards available of approximately $260,000 for federal and $98,000 for California tax purposes.

The extent to which the federal and California operating loss and tax credit carryforwards can be used to offset future taxable income may be limited, depending on the extent of ownership changes within any three-year period, as provided in the Tax Reform Act of 1986. Such a limitation could result in the expiration of carryforwards before they are utilized.

F-17

NATUS MEDICAL INCORPORATED

NOTES TO FINANCIAL STATEMENTS--(Continued)

12--EMPLOYEE BENEFIT PLAN

The Company has a 401(k) tax-deferred savings plan under which eligible employees may elect to have a portion of their salary deferred and contributed to the plan. Employer matching contributions are determined by the Board of Directors and are discretionary. There were no employer matching contributions in 1997, 1998 or 1999; however, the Board of Directors approved a dollar-for- dollar employer match of up to $500 per employee on employee contributions for the year ending December 31, 2000.

On September 1, 1999, the Board of Directors approved the creation of retention plans (the "Plans"), which were designed to provide eligible employees with (i) retention benefits payable upon the employee's continued employment with the Company before and through the effective date of a change in control, as defined by the Plans, and (ii) severance benefits upon certain terminations of employment before or after a change in control. Severance benefits include, among others, accelerated vesting on options outstanding to purchase the Company's common stock and cash payments, up to a defined maximum for each participant, based on the terms of the change in control event. Certain employees who are designated by the Board of Directors are eligible to participate in the Plans. The Plans terminate in September 2000, unless extended by the Board of Directors or a change in control occurs prior to termination.

13--CUSTOMER AND GEOGRAPHIC INFORMATION

The Company operates in one reportable segment and is engaged in the design, manufacture and, marketing of newborn screening products for the identification and monitoring of common medical disorders that may occur during the critical development period of infants. The nature of the Company's products and production processes as well as type of customers and distribution methods are consistent among all of the Company's devices.

Revenues from customers by geographic area are as follows (in thousands):

                                        Years Ended December     Six Months
                                                 31,           Ended June 30,
                                       ----------------------- --------------
                                        1997    1998    1999    1999   2000
                                       ------- ------- ------- ------ -------
                                                                (unaudited)
Net revenues:
  United States....................... $ 8,650 $12,820 $17,804 $8,535 $ 9,511
  Japan...............................     169   2,228   1,717    295   1,323
  All other...........................   1,212     836     262     88     175
                                       ------- ------- ------- ------ -------
                                       $10,031 $15,884 $19,783 $8,918 $11,009
                                       ======= ======= ======= ====== =======

For all periods presented, all of the Company's long-lived assets were located within the United States.

In 1997 and 1999, no sales to a single customer accounted for greater than 10% of net revenues. One customer, a distributor, represented 14% of net revenues in fiscal year 1998 and 12% of net revenues for the six months ended June 30, 2000.

14--SUBSEQUENT EVENTS

Inventory Purchase

Subsequent to December 31, 1999, the Company purchased $780,000 of a major component in order to secure consistent components for its planned production needs for 2000.

1991 Stock Plan Amendment

In May 2000, the stockholders approved an amendment to increase the numbers of shares of common stock reserved for issuance under the Plan to an aggregate of 2,393,482 shares.

F-18

NATUS MEDICAL INCORPORATED

NOTES TO FINANCIAL STATEMENTS--(Continued)

Creation of Subsidiary

On July 28, 2000, the Company created and incorporated a wholly owned subsidiary in Japan.

Other Matters

On August 15, 2000, the stockholders approved the following actions:

. A two-for-five reverse stock split of the outstanding shares of common and preferred stock; accordingly, all share and per share amounts in these financial statements have been restated to give effect to the reverse stock split.

. Reincorporation of the Company in the State of Delaware, including an increase of the authorized shares of common stock to 120,000,000, and the associated exchange of one share of common stock or preferred stock of the Company for every share of common stock or preferred stock, as the case may be, of the Company's California predecessor. The reincorporation was effected on August 16, 2000. Accordingly, these financial statements have been restated to reflect the effect of the reincorporation.

. Adoption of the 2000 Employee Stock Purchase Plan to be effective upon the effectiveness of the initial public offering contemplated by the Company. Under the purchase plan, eligible employees are allowed to have salary withholdings of up to 15% of their base compensation to purchase shares of common stock at a price equal to 85% of the lower of the market value of the stock at the beginning or end of defined purchase periods. The initial purchase period commences upon the effective date of the initial public offering of the Company's common stock. The Company has initially reserved 1,000,000 shares of common stock under this plan, plus an annual increase to be added on the first day of the Company's fiscal year beginning January 1, 2002 equal to the lesser of (i) 650,000 shares,
(ii) 4% of the shares of common stock outstanding on the last day of the preceding fiscal year, or (iii) an amount determined by the Board of Directors.

. Adoption of the 2000 Stock Option Plan (the "2000 Stock Plan") and the termination of the 1991 Stock Option Plan (the "1991 Stock Plan") as to future option grants to be effective upon the effectiveness of the initial public offering contemplated by the Company. The Company has initially reserved a total of 1,500,000 shares of common stock under the 2000 Stock Plan, plus an annual increase to be added on the first day of the Company's fiscal year beginning January 1, 2002 equal to the lesser of (i) 1,500,000 shares, (ii) 7% of the shares of common stock outstanding on the last day of the preceding fiscal year, or (iii) an amount determined by the Board of Directors.

. Adoption of the 2000 Director Option Plan (the "2000 Director Plan") to be effective upon the effectiveness of the initial public offering contemplated by the Company. The 2000 Director Plan provides for an initial grant to new nonemployee directors, options to purchase 30,000 shares of common stock. Subsequent to the initial grant, each nonemployee director will be granted an option to purchase 10,000 shares of common stock at the next meeting of the Board of Directors following the annual meeting of stockholders, if on the date of the annual meeting the director has served on the board of directors for six months. The Company has initially reserved a total of 400,000 shares of common stock under the 2000 Director Plan, plus an annual increase to be added on the first day of the Company's fiscal year beginning January 1, 2002 equal to the lesser of (i) 100,000 shares, (ii) 0.5% of the shares of common stock outstanding on the last day of the preceding fiscal year, or (iii) an amount determined by the Board of Directors.

. Authorization of a new class of undesignated preferred stock totaling 10,000,000 shares, contingent upon the reincorporation of the Company in Delaware and the closing of the initial public offering contemplated by the Company.

F-19

[Artwork:

Text reads as follows: CO-Stat/R/ End Tidal Breath Analyzer passively and non- invasively measures carbon monoxide in a baby's breath to accurately identify the rate at which red blood cells are being broken down. Identifying hemolysis, the breakdown of red blood cells, is a critical component in the management of neonatal jaundice. The CO-Stat analyzer identifies the rate of hemolysis non- invasely without any patient effort at the baby's crib-side.

Picture showing the CO-Stat/R/ End Tidal Breath Analyzer in use.

Caption at bottom of page: NATUS because every baby is precious.]




Shares Natus Medical Incorporated Common Stock

[LOGO OF NATUS MEDICAL INCORPORATED APPEARS HERE]


PROSPECTUS
, 2000

Salomon Smith Barney

Dain Rauscher Wessels

Prudential Vector Healthcare
a unit of Prudential Securities




PART II

INFORMATION NOT REQUIRED IN PROSPECTUS

ITEM 13. OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION.

The following table sets forth the costs and expenses, other than the underwriting discounts, payable by the Registrant in connection with the sale of the securities being registered. All amounts are estimates except the SEC registration fee, the NASD filing fee and the Nasdaq National Market System listing fee.

SEC Registration Fee............................................. $   13,358
NASD Filing Fee..................................................      5,560
Nasdaq National Market Listing Fee...............................     95,000
Printing Costs...................................................    250,000
Legal Fees and Expenses..........................................    650,000
Accounting Fees and Expenses.....................................    500,000
Blue Sky Fees and Expenses.......................................     10,000
Transfer Agent and Registrar Fees................................     10,000
Miscellaneous....................................................     16,082
                                                                  ----------
  Total.......................................................... $1,550,000
                                                                  ==========

ITEM 14. INDEMNIFICATION OF DIRECTORS AND OFFICERS.

The Registrant is subject to Section 145 of the Delaware General Corporation Law ("Section 145"). Section 145 permits indemnification of officers and directors of the Registrant under certain conditions and subject to certain limitations, but in terms sufficiently broad to permit indemnification (including reimbursement for expenses) under certain circumstances for liabilities arising under the Securities Act of 1933, as amended (the "Securities Act"). Section 145 also provides that a corporation has the power to maintain insurance on behalf of its officers and directors against any liability asserted against such person and incurred by him or her in such capacity, or arising out of his or her status as such, whether or not the corporation would have the power to indemnify him or her against such liability under the provisions of Section 145. Article VI, Section 6.1, of the Registrant's Bylaws provides for mandatory indemnification of its directors and officers and permissible indemnification of employees and other agents to the maximum extent not prohibited by the Delaware General Corporation Law, including proceedings under the Securities Act or the Securities Exchange Act of 1934, as amended. The rights to indemnity thereunder continue as to a person who has ceased to be a director, officer, employee or agent and inure to the benefit of the heirs, executors and administrators of the person. In addition, expenses incurred by a director or executive officer in defending any civil, criminal, administrative or investigative action, suit or proceeding by reason of the fact that he or she is or was a director or officer of the Registrant (or was serving at the Registrant's request as a director or officer of another corporation) shall be paid by the Registrant in advance of the final disposition of such action, suit or proceeding upon receipt of an undertaking by or on behalf of such director or officer to repay such amount if it shall ultimately be determined that he or she is not entitled to be indemnified by the Registrant as authorized by the relevant section of the Delaware General Corporation Law.

As permitted by Section 102(b)(7) of the Delaware General Corporation Law, the Registrant's Certificate of Incorporation provides that, pursuant to Delaware law, its directors shall not be personally liable for monetary damages for breach of the directors' fiduciary duty as directors to the Registrant and its stockholders. This provision in the Certificate of Incorporation does not eliminate the directors' fiduciary duty, and in appropriate circumstances equitable remedies such as injunctive or other forms of non-monetary relief will remain available under Delaware law. In addition, each director will continue to be subject to liability for breach of the director's duty of loyalty to the Registrant for acts or omission not in good faith or involving intentional misconduct, for knowing violations of law, for actions leading to improper personal benefit to the director, and for payment of dividends or approval of Stock repurchases or redemptions that are unlawful under

II-1


Section 174 of the Delaware General Corporation Law. The provision also does not affect a director's responsibilities under any other law, such as the federal securities laws or state or federal environmental laws. Prior to the effective date of this offering, the Registrant will enter into indemnification agreements with each of its directors and executive officers. Generally, the indemnification agreements attempt to provide the maximum protection permitted by Delaware law as it may be amended from time to time. Moreover, the indemnification agreements provide for certain additional indemnification. Under such additional indemnification provisions, however, an individual will not receive indemnification for judgments, settlements or expenses if he or she is found liable to the Registrant (except to the extent the court determines he or she is fairly and reasonably entitled to indemnity for expenses), for settlements not approved by the Registrant or for settlements and expenses if the settlement is not approved by the court. The indemnification agreements provide for the Registrant to advance to the individual any and all reasonable expenses (including legal fees and expenses) incurred in investigating or defending any such action, suit or proceeding. In order to receive an advance of expenses, the individual must submit to the Registrant copies of invoices presented to him or her for such expenses. Also, the individual must repay such advances upon a final judicial decision that he or she is not entitled to indemnification.

The Registrant intends to enter into additional indemnification agreements with each of its directors and executive officers to effectuate these indemnity provisions and to purchase directors' and officers' liability insurance.

In addition to the foregoing, the Underwriting Agreement contains certain provisions by which the Underwriters have agreed to indemnify the Registrant, each person, if any, who controls the Registrant within the meaning of Section 15 of the Securities Act, each director of the Registrant, each officer of the Registrant who signs the Registration Statement, with respect to information furnished in writing by or on behalf of the Underwriters for use in the Registration Statement.

At present, there is no pending litigation or proceeding involving a director, officer, employee or other agent of the Registrant in which indemnification is being sought, nor is the Registrant aware of any threatened litigation that may result in a claim for indemnification by any director, officer, employee or other agent of the Registrant.

ITEM 15. RECENT SALES OF UNREGISTERED SECURITIES.

Since our incorporation in February 1987, we have sold and issued the following securities:

1. In June 1987, May 1989, December 1989, May 1990, June 1990, December 1990 and February 1991, the Registrant issued and sold 1,229,078 shares of Common Stock to 5 of our founders for $2.22 million pursuant to Section 4(2) of the Securities Act.

3. In August 1991, December 1992 and January 1993, the Registrant issued and sold an aggregate of 3,967,120 shares of Series B Preferred Stock to 36 accredited investors for approximately $6.94 million pursuant to Section 4(2) of the Securities Act.

4. In June 1995, August 1995, November 1995, March 1996, April 1996 and May 1996, the Registrant issued and sold an aggregate of 1,428,568 shares of Series C Preferred Stock and warrants to purchase 1,785,714 shares of Series C Preferred Stock to 43 accredited investors for approximately $2.50 million pursuant to Section 4(2) of the Securities Act.

5. In April and May 1997, the Registrant issued and sold 1,232,392 shares of Series D Preferred Stock to 42 accredited investors for approximately $3.85 million pursuant to Section 4(2) of the Securities Act.

6. In December 1999, the Registrant issued and sold 1,061,613 shares of Series C Preferred Stock to 41 accredited investors for approximately $603,000 and the cancellation of Series C shares upon the exercise of warrants pursuant to Section 4(2) of the Securities Act.

II-2


7. Pursuant to Rule 701 promulgated under the Securities Act, from July 1991 to June 30, 2000, the Registrant issued and sold 750,729 shares of Common Stock to employees and consultants for aggregate consideration of approximately $307,196 upon the exercise of stock options pursuant to the Registrant's 1991 Stock Option Plan.

The recipients of securities in each such transaction represented their intentions to acquire the securities for investment only and not with a view to or for sale in connection with any distribution thereof and appropriate legends were affixed to the share certificates and warrants issued in such transactions. All recipients had adequate access, through their relationships with us, to information about us.

ITEM 16. EXHIBITS AND FINANCIAL STATEMENT SCHEDULES.

(a) Exhibits

 1.1*  Form of Underwriting Agreement

 3.1   Certificate of Incorporation of the Registrant, as currently in effect

 3.1.1 Form of Certificate of Incorporation of the Registrant to be filed
        after the closing of the offering made under this Registration
        Statement

 3.2   Bylaws of the Registrant

 4.1*  Specimen Common Stock Certificate

 4.2   Information and Registration Rights Agreement dated August 15, 1991 and
        amendments thereto by and among the Registrant and certain
        stockholders of the Registrant

 5.1*  Opinion of Wilson Sonsini Goodrich & Rosati, Professional Corporation

       Form of Indemnification Agreement between the Registrant and each of
10.1   its directors and officers

10.2   Amended and Restated 1991 Stock Option Plan

10.2.1 Form of Option Agreement under the 1991 Stock Option Plan

10.3   2000 Stock Option Plan

10.3.1 Form of Option Agreement under the 2000 Stock Option Plan

10.4   2000 Director Option Plan

10.4.1 Form of Option Agreement under 2000 Director Option Plan

       2000 Employee Stock Purchase Plan and form of subscription agreement
10.5   thereunder

10.6+  Distribution Agreement dated June 11, 1997 between Registrant and
        Nippon Eurotec Co., Ltd.

10.6.1 Addendum to Distribution Agreement dated January 1, 2000 between
        Registrant and Nippon Eurotec Co., Ltd.

10.7+  Patent License Agreement dated June 30, 1998 between Registrant and The
        Leland Stanford Junior University

       Lease Agreement dated August 24, 1998 between Registrant and San Carlos
10.8    Co-Tenancy

10.9   Promissory Note dated March 24, 1999 between Scott Valley Bank and Tim
        C. Johnson

10.9.1 Assignment of Deposit Account dated March 24, 1999 between Registrant,
        Scott Valley Bank and Tim C. Johnson

10.9.2 Security Agreement dated March 26, 1999 between Registrant and Tim C.
        Johnson

10.10+ Capital Equipment Supplier Agreement dated June 25, 1999 between the
        Registrant and Novation, LLC

10.11+ Manufacturing Agreement dated December 3, 1998 between Registrant and
        TriVirix International, Inc. (formerly CMA International, Inc.)

II-3


      Commercial Lease dated August 4, 2000 between Registrant and Concept
10.12  Development Corp.

21.1  Subsidiaries

23.1  Independent Auditors' Consent and Report on Schedule

23.2* Consent of Counsel (included in Exhibit 5.1)

24.1  Power of Attorney (see Page II-5)

27.1  Financial Data Schedule


* To be filed by amendment.

+ Confidential treatment requested.

(b) Financial Statement Schedules

Schedule II - Valuation and Qualifying Accounts

Schedules not listed above have been omitted because the information required to be set forth therein is not applicable or is shown in the financial statements or notes thereto.

ITEM 17. UNDERTAKINGS.

The undersigned registrant hereby undertakes to provide to the underwriters at the closing specified in the underwriting agreements certificates in such denominations and registered in such names as required by the underwriters to permit prompt delivery to each purchaser.

Insofar as indemnification for liabilities arising under the Securities Act of 1933 may be permitted to directors, officers and controlling persons of the registrant pursuant to the foregoing provisions, or otherwise, the registrant has been advised that in the opinion of the Securities and Exchange Commission such indemnification is against public policy as expressed in the Securities Act and is, therefore, unenforceable. In the event that a claim for indemnification against such liabilities (other than the payment by the registrant of expenses incurred or paid by a director, officer, or controlling person of the registrant in the successful defense of any action, suit or proceeding) is asserted by such director, officer or controlling person in connection with the securities being registered, the registrant will, unless in the opinion of its counsel the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question whether such indemnification by it is against public policy as expressed in the Securities Act and will be governed by the final adjudication of such issue.

The undersigned registrant hereby undertakes that:

(1) For purposes of determining any liability under the Securities Act of 1933, the information omitted from the form of prospectus filed as part of this registration statement in reliance upon Rule 430A and contained in a form of prospectus filed by the registrant pursuant to Rule 424(b)(1) or
(4) or 497(h) under the Securities Act shall be deemed to be part of this registration statement as of the time it was declared effective.

(2) For the purpose of determining any liability under the Securities Act of 1933, each post-effective amendment that contains a form of prospectus shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.

II-4


SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, the registrant has duly caused this registration statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of San Carlos, State of California on August 18, 2000.

         /s/ Tim C. Johnson
By: _________________________________
     Tim C. Johnson
     President, Chief Executive
     Officer, Chief Operating
     Officer and Director

POWER OF ATTORNEY

KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears below hereby constitutes and appoints, jointly and severally, Tim C. Johnson and William H. Lawrenson, and each of them, as his attorney-in-fact, with full power of substitution, for him or her in any and all capacities, to sign any and all amendments to this registration statement (including post-effective amendments), and any and all registration statements filed pursuant to Rule 462 under the Securities Act of 1933, as amended, in connection with or related to the offering contemplated by this registration statement and its amendments, if any, and to file the same, with exhibits thereto and other documents in connection therewith, with the Securities and Exchange Commission, hereby ratifying and confirming our signatures as they may be signed by our said attorney to any and all amendments to said registration statement.

PURSUANT TO THE REQUIREMENTS OF THE SECURITIES ACT OF 1933, THIS REGISTRATION STATEMENT HAS BEEN SIGNED BY THE FOLLOWING PERSONS IN THE CAPACITIES AND ON THE DATES INDICATED:

             Signature                           Title                  Date
             ---------                           -----                  ----

       /s/ Tim C. Johnson            President, Chief Executive    August 18, 2000
____________________________________  Officer, Chief Operating
           Tim C. Johnson             Officer and Director
                                      (Principal Executive
                                      Officer)

    /s/ William H. Lawrenson         Vice President Finance and    August 18, 2000
____________________________________  Chief Financial Officer
        William H. Lawrenson          (Principal Financial and
                                      Accounting Officer)

      /s/ William New, Jr.           Director                      August 18, 2000
____________________________________
          William New, Jr.

    /s/ James J. Bochnowski          Director                      August 18, 2000
____________________________________
        James J. Bochnowski

      /s/ William M. Moore           Director                      August 18, 2000
____________________________________
          William M. Moore

      /s/ David Nierenberg           Director                      August 18, 2000
____________________________________
          David Nierenberg

II-5


Schedule II

NATUS MEDICAL INCORPORATED

VALUATION AND QUALIFYING ACCOUNTS
(in thousands)

Allowance for Doubtful Accounts

                                    Balance at Charges to Deductions- Balance at
                                    beginning  costs and  write-offs     end
Year Ended                          of period   expenses  of accounts of period
----------                          ---------- ---------- ----------- ----------
June 30, 2000(*)...................    201         24          --        225
December 31, 1999..................    138        131         (68)       201
December 31, 1998..................    125         13          --        138
December 31, 1997..................     55         83         (13)       125

                                Warranty Reserve

June 30, 2000(*)...................    487        144         (65)       566
December 31, 1999..................    500        185        (198)       487
December 31, 1998..................    297        306        (103)       500
December 31, 1997..................    244        112         (59)       297


(*) Unaudited

S-1

EXHIBITS

 1.1*  Form of Underwriting Agreement

 3.1   Certificate of Incorporation of the Registrant, as currently in effect

 3.1.1 Form of Certificate of Incorporation of the Registrant to be filed
        after the closing of the offering made under this Registration
        Statement

 3.2   Bylaws of the Registrant

 4.1*  Specimen Common Stock Certificate

 4.2   Information and Registration Rights Agreement dated August 15, 1991 and
        amendments thereto by and among the Registrant and certain
        stockholders of the Registrant

 5.1*  Opinion of Wilson Sonsini Goodrich & Rosati, Professional Corporation

       Form of Indemnification Agreement between the Registrant and each of
10.1   its directors and officers

10.2   Amended and Restated 1991 Stock Option Plan

10.2.1 Form of Option Agreement under the 1991 Stock Option Plan

10.3   2000 Stock Option Plan

10.3.1 Form of Option Agreement under the 2000 Stock Option Plan

10.4   2000 Director Option Plan

10.4.1 Form of Option Agreement under 2000 Director Option Plan

       2000 Employee Stock Purchase Plan and form of subscription agreement
10.5   thereunder

10.6+  Distribution Agreement dated June 11, 1997 between Registrant and
        Nippon Eurotec Co., Ltd.

10.6.1 Addendum to Distribution Agreement dated January 1, 2000 between
        Registrant and Nippon Eurotec Co., Ltd.

10.7+  Patent License Agreement dated June 30, 1998 between Registrant and The
        Leland Stanford Junior University

       Lease Agreement dated August 24, 1998 between Registrant and San Carlos
10.8    Co-Tenancy

10.9   Promissory Note dated March 24, 1999 between Scott Valley Bank and Tim
        C. Johnson

10.9.1 Assignment of Deposit Account dated March 24, 1999 between Registrant,
        Scott Valley Bank and Tim C. Johnson

10.9.2 Security Agreement dated March 26, 1999 between Registrant and Tim C.
        Johnson

10.10+ Capital Equipment Supplier Agreement dated June 25, 1999 between the
        Registrant and Novation, LLC

10.11+ Manufacturing Agreement dated December 3, 1998 between Registrant and
        TriVirix International, Inc. (formerly CMA International, Inc.)

       Commercial Lease dated August 4, 2000 between Registrant and Concept
10.12   Development Corp.

21.1   Subsidiaries

23.1   Independent Auditors' Consent and Report on Schedule

23.2*  Consent of Counsel (included in Exhibit 5.1)

24.1   Power of Attorney (see Page II-5)

27.1   Financial Data Schedule


* To be filed by amendment.

+ Confidential treatment requested.


EXHIBIT 3.1

CERTIFICATE OF INCORPORATION

OF

NATUS MEDICAL INCORPORATED

ARTICLE I.

The name of this corporation is Natus Medical Incorporated.

ARTICLE II.

The address of the corporation's registered office in the State of Delaware is 1209 Orange Street, City of Wilmington, County of Newcastle, Delaware 19801. The name of its registered agent at such address is The Corporation Trust Company.

ARTICLE III.

The purpose of the corporation is to engage in any lawful act or activity for which a corporation may be organized under the General Corporation Law of Delaware.

ARTICLE IV.

The total number of shares of all classes of stock which the Corporation is authorized to issue is 130,023,254 shares, consisting of 120,000,000 shares of Common Stock, $0.001 par value, and 10,023,254 shares of Preferred Stock, $0.001 par value. The Preferred Stock consists of four series, of which 1,241,842 shares have been designated as Series A Preferred Stock (the "Series A Preferred Stock"), of which 3,967,126 shares have been designated as Series B Preferred Stock (the "Series B Preferred Stock"), of which 3,214,286 shares have been designated as Series C Preferred Stock (the "Series C Preferred Stock") and of which 1,600,000 shares have been designated as Series D Preferred Stock (the "Series D Preferred Stock").

The relative rights, preferences, privileges and restrictions granted to or imposed on the respective series or classes of capital stock or the holders thereof are as follows:

Section 1. General Definitions. For purposes of this Article the following definitions shall apply:

A. `Junior Shares' shall mean all Common and any other shares of this corporation other than the preferred.

B. `Subsidiary' shall mean any corporation at least 50% of whose outstanding voting shares shall at the time be owned by this corporation or by one or more of such subsidiaries.

Section 2. Dividend Rights of Preferred. The holders of the Series B, Series C and Series D Preferred shall be entitled to receive, out of any funds legally available therefor, dividends at the rate of $0.18 per share, per annum, on each outstanding share of Series B, Series C or Series D Preferred, and no more, payable in preference and priority to any payment of any dividend on Series A Preferred or Junior Shares when and as declared by the Board of Directors. With respect to a liquidation, dissolution or winding up of the corporation pursuant to Section 3 below, with respect to a redemption of the Series B, Series C or Series D Preferred pursuant to Section 4 below and with respect to payment of any dividend on Series A Preferred or Junior Shares, the right to such dividends on the Series B, Series C and Series D Preferred shall accrue and be deemed to accrue from day to day commencing with the date of issuance of each such share, whether or not earned or declared. Such accrued dividends shall be cumulative so that if at any time such dividends on the Series B, Series C or Series D Preferred shall not have been paid, or declared and set apart for payment, the deficiency shall be fully paid or declared and set apart for payment before any dividend or other distribution shall be paid or declared or set apart for payment on any Series A Preferred or Junior Shares. An accumulation of dividends on the Series B, Series C and Series D Preferred shall not bear interest. With respect to conversion of Series B, Series C and Series D Preferred pursuant to Section 5 below, the right to such dividends on shares of Series B, Series C and Series D Preferred shall not be cumulative, and no right shall accrue to holders of Series B, Series C or Series D Preferred by reason of the fact that dividends on said shares are not declared or paid in any prior year.

Dividends if paid, or if declared and set apart for payment, must be paid on or declared and set apart for payment on each share of Series B, Series C and Series D Preferred contemporaneously, and if less than full dividends are paid on or declared and set apart for payment, the same percentage of the dividend rate will be paid on or declared and set apart for payment on each share of Series B, Series C and Series D Preferred.

The holders of the Series A Preferred shall be entitled to receive, out of any funds legally available therefor, dividends at the rate of $0.14 per share, per annum, on each outstanding share of Series A Preferred, and no more, payable in preference and priority to any payment of any dividend on Junior Shares when and as declared by the Board of Directors. With respect to a liquidation, dissolution or winding up of the corporation pursuant to Section 3 below, with respect to a redemption of the Series A Preferred pursuant to Section 4 below and with respect to payment of any dividend on Junior Shares, the right to such dividends on the Series A Preferred shall accrue and be deemed to accrue from day to day commencing with the date of issuance of each such share, whether or not earned or declared. Such accrued dividends shall be cumulative so that if at any time such dividends on the Series A Preferred shall not have been paid, or declared and set apart for payment, the deficiency shall be fully paid or declared and set apart for payment before any dividend or other distribution shall be paid or declared or set apart for payment on any Junior Shares. An accumulation of dividends on the Series A Preferred shall not bear interest. With respect to conversion of Series A Preferred pursuant to Section 5 below, the right to such dividends on shares of Series A Preferred shall not be cumulative, and no right shall accrue to holders of Series A Preferred by reason of the fact that dividends on said shares are not declared or paid in any prior year.

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Dividends if paid, or if declared and set apart for payment, must be paid on or declared and set apart for payment on each share of Series A Preferred contemporaneously, and if less than full dividends are paid on or declared and set apart for payment, the same percentage of the dividend rate will be paid on or declared and set apart for payment on each share of Series A Preferred.

After the holders of the Series A, Series B, Series C and Series D Preferred have received dividends equal to the preferential amounts set forth above, all remaining dividends shall be paid to the holders of Junior Shares in proportion to the number of shares held. Notwithstanding the foregoing, the corporation may repurchase or redeem Junior Shares from employees of the corporation upon termination of employment, pursuant to the terms of restrictive stock agreements entered into with such employees.

Section 3. Liquidation Preference.

(a) In the event of any liquidation, dissolution or winding up of the corporation, either voluntary or involuntary, the holders of the Series C and Series D Preferred shall be entitled to receive pari passu, prior and in preference to any distribution of any assets or property of the corporation to the holders of Series A or Series B Preferred or Junior Shares by reason of their ownership thereof, the amount of $2.625 per share for each share of Series C or of $3.125 for each share of the Series D Preferred, as the case may be, then held by them, plus an amount equal to all cumulative dividends and all declared and unpaid dividends on the Series C and Series D Preferred. If upon occurrence of such event the assets and property thus distributed among the holders of the Series C and Series D Preferred shall be insufficient to permit the payment to such holders of the full preferential amount, then the entire assets and property of the corporation legally available for distribution shall be distributed ratably among the holders of the Series C and Series D Preferred in proportion to the number of shares of Series C and Series D Preferred held by each holder.

After payment has been made to the holders of the Series C and Series D Preferred of the full amounts to which they shall be entitled as aforesaid, the holders of the Series B Preferred shall be entitled to receive, prior and in preference to any distribution of any assets or property of the corporation to the holders of Series A Preferred or Junior Shares by reason of their ownership thereof, the amount of $1.75 per share for each share of Series B Preferred then held by them, plus an amount equal to all cumulative dividends and all declared and unpaid dividends on the Series B Preferred. If upon occurrence of such event the assets and property thus distributed among the holders of the Series B Preferred shall be insufficient to permit the payment to such holders of the full preferential amount, then the entire assets and property of the corporation legally available for distribution shall be distributed ratably among the holders of the Series B Preferred in proportion to the number of shares of Series B Preferred held by each holder.

After payment has been made to the holders of the Series D, Series C and Series B Preferred of the full amounts to which they shall be entitled as aforesaid, the holders of Series A Preferred shall be entitled to receive prior and in preference to any distribution of any assets or property of the corporation to the holders of Junior Shares by reason of their ownership thereof, the amount of $1.75 per share for each share of Series A Preferred then held by them, plus an amount equal to all cumulative dividends and all declared and unpaid dividends on the Series A Preferred. If upon occurrence of such event the assets and property thus distributed among the

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holders of the Series A Preferred shall be insufficient to permit the payment to such holders of the full preferential amount, then the entire assets and property of the corporation legally available for distribution shall be distributed ratably among the holders of the Series A Preferred in proportion to the number of shares of Series A Preferred held by each holder.

After payment has been made to the holders of the Series D, Series C, Series B and Series A Preferred of the full amounts to which they shall be entitled as aforesaid, the holders of Junior Shares shall be entitled to receive the amount of $0.25 per share for each share of Junior Shares then held by them, plus an amount equal to all declared and unpaid dividends on the Junior Shares. If upon occurrence of such event the assets and property thus distributed among the holders of the Junior Shares shall be insufficient to permit the payment to such holders of the full preferential amount, then the entire assets and property of the corporation legally available for distribution shall be distributed ratably among the holders of the Junior Shares in proportion to the number of Junior Shares held by each holder.

After payment has been made to the holders of the Series D, Series C, Series B and Series A Preferred and Junior Shares of the full amounts to which they shall be entitled as aforesaid, the remaining assets of the corporation available for distribution to shareholders shall be distributed among the holders of Series D Series C, Series B and Series A Preferred and Junior Shares pro rata based on the number of shares of Common held by each assuming conversion of all such Series C, Series B and Series A Preferred at the then applicable Conversion Price taking into account all adjustments required by Sections 5(d)(iv) and 5(d)(v).

(b) For purposes of this Section 3, a merger or consolidation of the corporation with or into any other corporation or corporations, or a sale of all or substantially all of the assets of the corporation, shall be treated as a liquidation, dissolution or winding up, unless the shareholders of this corporation hold at least 50% of the outstanding voting equity securities of the surviving corporation; provided that nothing contained in this subsection (b) shall limit the right of a holder of Preferred to convert such shares into Common prior to the effective date of any such transaction.

(c) Each holder of an outstanding share of Preferred shall be deemed to have consented to distributions made by the corporation in connection with the repurchase of shares of Common issued to or held by employees or consultants upon termination of their employment or services pursuant to agreements providing for the right of said repurchase between the corporation and such persons.

Section 4. Redemption.

(a) Series A Preferred. The shares of Series A Preferred shall not be redeemable.

(b) Series B, Series C and Series D Preferred. On or at any time after January 1, 2000 this corporation may at any time it may lawfully do so, at the option of the Board of Directors, give notice to the holders of the Series B, Series C and Series D Preferred (the "Redemption Notice") of the corporation's election to redeem in whole or in part the Series B, Series C and Series D Preferred by paying in cash therefor an amount equal to $1.75, $1.75, and $3.125, respectively, per share for each share of Series B, Series C or Series D Preferred, together with all

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cumulative dividends and all declared and unpaid dividends on the Series B, Series C and Series D Preferred to the Redemption Date (such total amount is hereinafter referred to as the "Redemption Price") in the manner provided in
Section 4(c) below.

On or at any time after January 1, 2000, upon receipt by the corporation of the written request of the holders of not less than sixty-six and two-thirds percent (66 2/3%) of the then outstanding shares of Series B, Series C and Series D Preferred (the "Redemption Notice"), the corporation shall redeem the percentage of the Series B, Series C and Series D Preferred specified in such request (or, if less, the maximum amount it may lawfully redeem) by paying in cash therefor a sum per share equal to the Redemption Price in the manner provided in Section 4(c) below.

(c) Mechanics of Redemption. The redemption shall be effected, and the Redemption Price shall be paid, ratably on a quarterly basis over a three-year period commencing with the date of the Redemption Notice, or earlier as determined by the Board of Directors. So long as there are any shares of the Series B, Series C or Series D Preferred outstanding, the corporation shall set aside into a trust account to be established at a bank or trust company having aggregate capital and surplus in excess of $50,000,000 on the last day of March, June, September and December in each year commencing on the first such date after the date of the Redemption Notice (hereinafter, each such date shall be referred to as a "Redemption Date") a sum sufficient to redeem one-twelfth (1/12) of the shares of Series B, Series C and Series D Preferred outstanding on the date of the Redemption Notice. The Redemption Price shall be paid in cash out of monies legally available therefor as provided in this subsection (c). Redemption of less than all shares of Series B, Series C and Series D Preferred shall be pro rata among the holders of such series.

At least 15 but no more than 60 days prior to any Redemption Date, written notice shall be mailed, first class postage prepaid, to each holder of record (at the close of business on the business day next preceding the day on which notice is given) of the Series B, Series C and Series D Preferred to be redeemed, at the address last shown on the records of this corporation for the purpose of notice, or if no such address appears or is given at the place where the principal executive office of this corporation is located, notifying such holder of the redemption to be effected, specifying the number of shares to be redeemed from such holder, the Redemption Date, the Redemption Price, the place at which payment may be obtained and the date on which such holder's Conversion Rights (as hereinafter defined) as to such shares terminate and calling upon such holder to surrender to this corporation, in the manner and at the place designated, his certificate or certificates representing the shares to be redeemed (the "Second Redemption Notice"). Except as provided in the following paragraph, on or after the Redemption Date, each holder of Series B, Series C and Series D Preferred to be redeemed shall surrender to this corporation the certificate or certificates representing such shares, in the manner and at the place designated in the Second Redemption Notice, and thereupon the Redemption Price of such shares shall be payable to the order of the person whose name appears on such certificate or certificates as the owner thereof and each surrendered certificate shall be canceled. In the event less than all the shares represented by any such certificate are redeemed, a new certificate shall be issued representing the unredeemed shares.

From and after the close of business on each Redemption Date, unless there shall have been a default in payment of the Redemption Price, all rights of the holders of the shares of Series B, Series C and Series D Preferred to be redeemed on such Redemption Date (except the

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right to receive the Redemption Price without interest upon surrender of their certificate or certificates) including, without limitation, the Conversion Rights, shall cease with respect to such shares, and such shares shall not thereafter be transferred on the books of this corporation or be deemed to be outstanding for any purpose whatsoever. If the funds of the corporation legally available for redemption of shares of Series B, Series C and Series D Preferred on any Redemption Date are insufficient to redeem the total number of shares of Series B, Series C and Series D Preferred to be redeemed on such date, those funds which are legally available will be used to redeem the maximum possible number of such shares ratably among the holders of such shares to be redeemed. The quarterly Redemption Price shall be cumulative, so that if for any Redemption Date or Dates, such Redemption Price requirements shall not be fully discharged as they accrue, funds legally available therefor at any time thereafter shall be applied thereto until such requirements are brought current and fully discharged. The shares of Series B, Series C and Series D Preferred not redeemed shall remain outstanding and entitled to all the rights and preferences provided herein.

The balance of any monies deposited by this corporation pursuant to this subsection (c) remaining unclaimed at the expiration of two years following a Redemption Date shall thereafter be returned to this corporation, provided that the shareholder to which such monies would be payable hereunder shall be entitled, upon proof of its ownership of the Series B, Series C or Series D Preferred and payment of any bond requested by the Company, to receive such monies but without interest from such Redemption Date.

Section 5. Conversion. The holders of the Preferred shall have conversion rights as follows (the "Conversion Rights"):

(a) Right to Convert. Each share of Series D Preferred shall be convertible, at the option of the holder thereof, at any time after the date of issuance of such share, at the office of the corporation or any transfer agent for the Preferred, into such number of fully paid and nonassessable shares of Common, as is determined in the case of the Series D Preferred by dividing $3.125 by the Series D Conversion Price, determined as hereinafter provided, in effect at the time of conversion. The price at which the shares of Common shall be deliverable upon conversion of the Series D Preferred (the "Series D Conversion Price") shall initially be $3.125 per share of Common. The initial Series D Conversion Price shall be subject to adjustment as hereinafter provided.

Each share of Series C Preferred shall be convertible, at the option of the holder thereof, at any time after the date of issuance of such share, at the office of the corporation or any transfer agent for the Preferred, into such number of fully paid and nonassessable shares of Common, as is determined in the case of the Series C Preferred by dividing $1.75 by the Series C Conversion Price, determined as hereinafter provided, in effect at the time of conversion. The price at which shares of Common shall be deliverable upon conversion of the Series C Preferred (the "Series C Conversion Price") shall initially be $1.75 per share of Common. The initial Series C Conversion Price shall be subject to adjustment as hereinafter provided.

Each share of Series B Preferred shall be convertible, at the option of the holder thereof, at any time after the date of issuance of such share, at the office of the corporation or any transfer agent for the Preferred, into such number of fully paid and nonassessable shares of Common, as is determined in the case of the Series B Preferred by dividing $1.75 by the Series B

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Conversion Price, determined as hereinafter provided, in effect at the time of conversion. The price at which shares of Common shall be deliverable upon conversion of the Series B Preferred (the "Series B Conversion Price") shall initially be $1.75 per share of Common. The initial Series B Conversion Price shall be subject to adjustment as hereinafter provided.

Each share of Series A Preferred shall be convertible, at the option of the holder thereof, at any time after the date of issuance of such share, at the office of the corporation or any transfer agent for the Preferred, into such number of fully paid and nonassessable shares of Common, as is determined in the case of the Series A Preferred by dividing $1.75 by the Series A Conversion Price, determined as hereinafter provided, in effect at the time of conversion. The price at which shares of Common shall be deliverable upon conversion of the Series A Preferred (the "Series A Conversion Price") shall initially be $1.75 per share of Common. The initial Series A Conversion Price shall be subject to adjustment as hereinafter provided.

(b) Automatic Conversion. Each share of Preferred shall automatically be converted into shares of Common at the then effective Conversion Price upon either (i) the closing of a firm commitment underwritten public offering pursuant to an effective registration statement under the Securities Act of 1933, as amended (the "Act"), covering the offer and sale of Common for the account of the corporation to the public at a price per share of not less than Two Dollars and Seventy Cents ($2.70) and an aggregate offering price of more than Seven Million Five Hundred Thousand Dollars ($7,500,000), or
(ii) with respect to a series of Preferred, the written consent of holders of more than two-thirds of the aggregate of the originally issued shares of such series of Preferred voting separately. In the event of the automatic conversion of the Preferred upon a public offering as aforesaid, the person(s) entitled to receive the Common Stock issuable upon conversion of Preferred shall not be deemed to have converted such Preferred until immediately prior to the closing of such sale of securities.

(c) Mechanics of Conversion. No fractional shares of Common shall be issued upon conversion of Preferred. In lieu of any fractional shares to which the holder would otherwise be entitled, the corporation shall pay cash equal to such fraction multiplied by the then effective Conversion Price. Before any holder of Preferred shall be entitled to convert the same into full shares of Common, such holder shall surrender the certificate or certificates there- for, duly endorsed, at the office of the corporation or of any transfer agent for the Preferred, and shall give written notice to the corporation at such office that such holder elects to convert the same. The corporation shall, as soon as practicable thereafter, issue and deliver at such office to such holder of Preferred, a certificate or certificates for the number of shares of Common to which such holder shall be entitled as aforesaid and a check payable to the holder in the amount of any cash amounts payable as the result of a conversion into fractional shares of Common. Except as set forth in Section 5(a) above, such conversion shall be deemed to have been made immediately prior to the close of business on the date of such surrender of the shares of Preferred to be converted, and the person or persons entitled to receive the shares of Common issuable upon such conversion shall be treated for all purposes as the record holder or holders of such shares of Common on such date. If the conversion is in connection with an underwritten offer of securities registered pursuant to the Act, the conversion may, at the option of any holder tendering Preferred for conversion, be conditioned upon the closing with the underwriter of the sale of securities pursuant to such offering, in which event the person(s) entitled to receive the Common issuable upon such conversion of the Preferred shall not be

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deemed to have converted such Preferred until immediately prior to the closing of such sale of securities.

(d) Adjustments to Conversion Price for Diluting Issues.

(i) Special Definitions. For purposes of this Section 5(d), the following definitions shall apply:

(1) `Options' shall mean rights, options or warrants to subscribe for, purchase or otherwise acquire either Common or Convertible Securities.

(2) `Original Issue Date' shall mean the date that shares of Series C Preferred are first issued by the corporation.

(3) `Convertible Securities' shall mean any evidences of indebtedness, shares (other than Common) or other securities convertible into or exchangeable for Common.

(4) `Additional Shares of Common' shall mean all shares of Common issued (or, pursuant to Section 5(d)(iii), deemed to be issued) by the corporation upon or after the Original Issue Date, other than shares of Common issued or issuable at any time:

(A) upon conversion of the shares of Preferred authorized herein;

(B) up to 2,393,482 shares of Common Stock issued to officers, directors, and employees of, and consultants to, the corporation to be designated and approved by the Board of Directors;

(C) upon exercise of warrants to purchase up to 1,785,715 shares of Series C Preferred Stock;

(D) as a dividend or distribution on Preferred;

(E) by way of a subdivision, combination or consolidation of shares of Common described in Section 5(d)(vi) below; and

(F) pursuant to a distribution described in Section 5(d)(vii) below or pursuant to a reorganization, reclassification, exchange or substitution described in Section 5(d)(viii) below.

(ii) No Adjustment of Conversion Price: No adjustment in the Conversion Price of a particular share of Preferred shall be made in respect of the issuance of Additional Shares of Common unless the consideration per share for an Additional Share of Common issued or deemed to be issued by the corporation is less than the Conversion Price in effect on the date of, and immediately prior to such issue, for such share of Preferred.

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(iii) Deemed Issue of Additional Shares of Common.

(1) Options and Convertible Securities. In the event the corporation at any time or from time to time after the Original Issue Date shall issue any Options or Convertible Securities or shall fix a record date for the determination of holders of any class of securities entitled to receive any such Options or Convertible Securities, then the maximum number of shares (as set forth in the instrument relating thereto without regard to any provisions contained therein for a subsequent adjustment of such number) of Common issuable upon the exercise of such Options or, in the case of Convertible Securities and Options therefor, the conversion or exchange of such Convertible Securities, shall be deemed to be Additional Shares of Common issued as of the time of such issue or, in case such a record date shall have been fixed, as of the close of business on such record date, provided that Additional Shares of Common shall not be deemed to have been issued unless the consideration per share (determined pursuant to Section 5(d)(vi) hereof) of such Additional Shares of Common would be less than the Conversion Price in effect on the date of and immediately prior to such issue, or such record date, as the case may be, and provided further that in any such case in which Additional Shares of Common are deemed to be issued:

(A) no further adjustment in the Conversion Price shall be made upon the subsequent issue of Convertible Securities or shares of Common upon the exercise of such Options or conversion or exchange of such Convertible Securities;

(B) if such Options or Convertible Securities by their terms provide, with the passage of time or otherwise, for any change in the consideration payable to the corporation, or change in the number of shares of Common issuable, upon the exercise, conversion or exchange thereof, the Conversion Price computed upon the original issue thereof (or upon the occurrence of a record date with respect thereto), and any subsequent adjustments based thereon, shall, upon any such change becoming effective, be recomputed to reflect such change insofar as it affects such Options or the rights of conversion or exchange under such Convertible Securities;

(C) upon the expiration of any such Options or any rights of conversion or exchange under such Convertible Securities which shall not have been exercised, the Conversion Price computed upon the original issue thereof (or upon the occurrence of a record date with respect thereto), and any subsequent adjustments based thereon, shall, upon such expiration, be recomputed as if:

(I) in the case of Convertible Securities or Options for Common, the only Additional Shares of Common issued were shares of Common, if any, actually issued upon the exercise of such Options or the conversion or exchange of such Convertible Securities and the consideration received therefor was the consideration actually received by the corporation for the issue of all such Options, whether or not exercised, plus the consideration actually received by the corporation upon such exercise, or for the issue of all such Convertible Securities which were actually converted or exchanged, plus the additional consideration, if any, actually received by the corporation upon such conversion or exchange, and

(II) in the case of Options for Convertible Securities, only the Convertible Securities, if any, actually issued upon the exercise thereof were

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issued at the time of issue of such Options, and the consideration received by the corporation for the Additional Shares of Common deemed to have been then issued was the consideration actually received by the corporation for the issue of all such Options, whether or not exercised, plus the consideration deemed to have been received by the corporation upon the issue of the Convertible Securities with respect to which such Options were actually exercised;

(D) no readjustment pursuant to clause (B) or (C)
above shall have the effect of increasing the Conversion Price to an amount which exceeds the lower of (i) the Conversion Price on the original adjustment date, or (ii) the Conversion Price that would have resulted from any issuance of Additional Shares of Common between the original adjustment date and such readjustment date; and

(E) in the case of any Options which expire by their terms not more than 30 days after the date of issue thereof, no adjustment of the Conversion Price shall be made until the expiration or exercise of all such Options, whereupon such adjustment shall be made in the same manner provided in clause (C) above.

(2) Stock Dividends. In the event the corporation at any time or from time to time after the Original Issue Date shall declare or pay any dividend on the Common payable in Common, then and in any such event, Additional Shares of Common shall be deemed to have been issued immediately after the close of business on the record date for the determination of holders of any class of securities entitled to receive such dividend.

(iv) Adjustment of Conversion Price Upon Issuance of Additional Shares of Common. In the event this corporation shall issue Additional Shares of Common (including Additional Shares of Common deemed to be issued pursuant to Section 5(d)(iii)) without consideration or for a consideration per share less than the Conversion Price in effect on the date of and immediately prior to such issue, then and in such event, such Conversion Price shall be reduced, concurrently with such issue, to a price equal to the lowest such consideration per share at which any of such Additional Shares of Common shall have been issued or deemed to have been issued.

(v) Determination of Consideration. For purposes of this Section 5(d), the consideration received by the corporation for the issue of any Additional Shares of Common shall be computed as follows:

(1) Cash and Property: Such consideration shall:

(A) insofar as it consists of cash, be computed at the aggregate amount of cash received by the corporation excluding amounts paid or payable for accrued interest, accrued dividends, expenses, discounts or commissions;

(B) insofar as it consists of property other than cash, be computed at the fair value thereof at the time of such issue, as determined in good faith by the Board; and

(C) in the event Additional Shares of Common are issued together with other shares or securities or other assets of the corporation for consideration which

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covers both, be the proportion of such consideration so received, computed as provided in clauses (A) and (B) above, as determined in good faith by the Board.

(2) Options and Convertible Securities. The consideration per share received by the corporation for Additional Shares of Common deemed to have been issued pursuant to Section 5(d)(iii)(1), relating to Options and Convertible Securities, shall be determined by dividing

(x) the total amount, if any, received or receivable by the corporation as consideration for the issue of such Options or Convertible Securities, plus the minimum aggregate amount of additional consideration (as set forth in the instruments relating thereto, without regard to any provision contained therein for a subsequent adjustment of such consideration) payable to the corporation upon the exercise of such Options or the conversion or exchange of such Convertible Securities, or in the case of Options for Convertible Securities, the exercise of such Options for Convertible Securities and the conversion or exchange of such Convertible Securities by

(y) the maximum number of shares of Common (as set forth in the instruments relating thereto, without regard to any provision contained therein for a subsequent adjustment of such number) issuable upon the exercise of such Options or the conversion or exchange of such Convertible Securities.

(3) Stock Dividends. Any Additional Shares of Common deemed to have been issued, relating to stock dividends, shall be deemed to have been issued for no consideration.

(vi) Adjustments for Subdivisions, Combinations or Consolidation
of Common. In the event the outstanding shares of Common shall be subdivided (by stock split or otherwise), into a greater number of shares of Common, the Conversion Price then in effect shall, concurrently with the effectiveness of such subdivision, be proportionately decreased. In the event the outstanding shares of Common shall be combined or consolidated, by reclassification or otherwise, into a lesser number of shares of Common, the Conversion Price then in effect shall, concurrently with the effectiveness of such combination or consolidation, be proportionately increased.

(vii) Adjustments for Other Distributions. In the event the corporation at any time or from time to time makes, or fixes a record date for the determination of holders of Common entitled to receive any distribution payable in securities of the corporation other than shares of Common, then and in each such event provision shall be made so that the holders of Preferred shall receive upon conversion thereof, in addition to the number of shares of Common receivable thereupon, the amount of securities of the corporation which they would have received had their Preferred been converted into Common on the date of such event and had they thereafter, during the period from the date of such event to and including the date of conversion, retained such securities receivable by them as aforesaid during such period, subject to all other adjustments called for during such period under this Section 5 with respect to the rights of the holders of the Preferred.

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(viii) Adjustments for Reorganization, Reclassification, Exchange and Substitution. If the Common issuable upon conversion of the Preferred shall be changed into the same or a different number of shares of any other class or classes of stock or other securities or property, whether by reorganization (unless such reorganization is deemed a liquidation under Section 3(b) hereof ), reclassification or otherwise (other than a subdivision or combination of shares provided for above), the Conversion Price then in effect shall, concurrently with the effectiveness of such reorganization or reclassification, be proportionately adjusted such that the Preferred shall be convertible into, in lieu of the number of shares of Common which the holders would otherwise have been entitled to receive, a number of shares of such other class or classes of stock or other securities or property equivalent to the number of shares of Common that would have been subject to receipt by the holders upon conversion of the Preferred immediately before such event or any prior record date therefor; and, in any such case, appropriate adjustment (as determined by the Board) shall be made in the application of the provisions herein set forth with respect to the rights and interest thereafter of the holders of the Preferred, to the end that the provisions set forth herein (including provisions with respect to changes in and other adjustments of the Conversion Price) shall thereafter be applicable, as nearly as reasonably may be, in relation to any shares of stock or other property thereafter deliverable upon the conversion of the Preferred.

(e) No Impairment. The corporation will not, by amendment of its Articles of Incorporation or through any reorganization, transfer of assets, consolidation, merger, dissolution, issue or sale of securities or any other voluntary action, avoid or seek to avoid the observance or performance of any of the terms to be observed or performed hereunder by the corporation but will at all times in good faith assist in the carrying out of all the provisions of this
Section 5 and in the taking of all such action as may be necessary or appropriate in order to protect the Conversion Rights of the holders of the Preferred against impairment.

(f) Certificate as to Adjustments. Upon the occurrence of each adjustment or readjustment of the Conversion Price pursuant to this Section 5, the corporation at its expense shall promptly compute such adjustment or readjustment in accordance with the terms hereof and furnish to each holder of Preferred a certificate setting forth such adjustment or readjustment and showing in detail the facts upon which such adjustment or readjustment is based. The corporation shall, upon the written request at any time of any holder of Preferred, furnish or cause to be furnished to such holder a like certificate setting forth (i) such adjustments and readjustments, (ii) the Conversion Price at the time in effect, and (iii) the number of shares of Common and the amount, if any, of other property which at the time would be received upon the conversion of Preferred.

(g) Notices of Record Date. In the event that this corporation shall propose at any time:

(i) to declare any dividend or distribution upon its Common shares, whether in cash, property, stock or other securities, whether or not a regular cash dividend and whether or not out of earnings or earned surplus;

(ii) to offer for subscription pro rata to the holders of any class or series of its stock any additional shares of stock of any class or series or other rights;

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(iii) to effect any reclassification or recapitalization of its Common shares outstanding involving a change in the Common shares; or

(iv) to merge or consolidate with or into any other corporation, or sell, lease or convey all or substantially all its property or business, or to liquidate, dissolve or wind up;

then, in connection with each such event, this corporation shall send to the holders of the Preferred shares:

(1) at least 20 days' prior written notice of the date on which a record shall be taken for such dividend, distribution or subscription rights (and specifying the date on which the holders of Common shares shall be entitled thereto) or for determining rights to vote in respect of the matters referred to in (iii) and (iv) above; and

(2) in the case of the matters referred to in (iii) and
(iv) above, at least 20 days' prior written notice of the date when the same shall take place (and specifying the date on which the holders of Common shares shall be entitled to exchange their Common shares for securities or other property deliverable upon the occurrence of such event).

Each such written notice shall be delivered personally or given by first class mail, postage prepaid, addressed to the holders of Preferred shares at the address for each such holder as shown on the books of this corporation.

Section 6. Voting Rights.

6.1 Vote Other than for Directors. Except as otherwise required by law or by Sections 6.2 and 7 hereof, the holders of Preferred shall be entitled to notice of any shareholders' meeting and to vote on all matters submitted to the shareholders for a vote, together with the holders of Common Stock, with the holders of Preferred having one vote for each full share of Common Stock into which their respective shares of Preferred are convertible on the record date for the vote or, if no such record date is established, at the date such vote is taken or any written consent of shareholders is solicited, and the holders of Common Stock having one vote per share of Common Stock. Except as otherwise required by law or by Sections 6.2 and 7 hereof, the holders of shares of Preferred and Common Stock shall vote together and not as separate classes.

6.2 Vote for Directors. So long as fifty percent (50%) of the originally issued shares of Series B, Series C and Series D Preferred are outstanding, the holders of the Series B, Series C and Series D Preferred shall vote together as one class with respect to the election of three directors; so long as more than twenty percent (20%) and less than fifty percent (50%) of the originally issued shares of Series B, Series C and Series D Preferred are outstanding, the holders of the Series B, Series C and Series D Preferred shall vote together as one class with respect to the election of two directors. The holders of Series A Preferred and Common shall vote together as one class with respect to the election of two directors, one of whom shall be the Chief Executive Officer of the Company and the other of whom shall not be a full time employee of the Company. The holders of the Series A, Series B, Series C and Series D Preferred and Common shall vote together as one class with respect to the election of any remaining directors. In the case of any vacancy in the

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office of the directors elected by the Series B, Series C and Series D Preferred pursuant to this Section 6.2, a successor shall be elected to hold office for the unexpired term of such director by the affirmative vote of a majority of the shares of Series B, Series C and Series D Preferred given at a special meeting of such shareholders duly called or by an action by written consent for that purpose. Subject to applicable law, a director who shall have been elected by the Series B, Series C and Series D Preferred pursuant to this Section 6.2 may be removed during the aforesaid term of office, either for or without cause, by, and only by, the affirmative vote of the holders of a majority of the shares of Series B, Series C and Series D Preferred given at a special meeting of such shareholders duly called or by an action by written consent for that purpose, and any such vacancy thereby created may be filled by the vote of the holders of a majority of the shares of the Series B, Series C and Series D Preferred represented at such meeting or by an action by written consent of the holders of the Series B, Series C and Series D Preferred. In the case of any vacancy in the office of the directors elected by the Series A Preferred and Common pursuant to this Section 6.2, a successor shall be elected to hold office for the unexpired term of such director by the affirmative vote of a majority of the shares of Series A Preferred and Common given at a special meeting of such shareholders duly called or by an action by written consent for that purpose. Subject to applicable law, a director who shall have been elected by the Series A Preferred and Common pursuant to this Section 6.2 may be removed during the aforesaid term of office, either for or without cause, by, and only by, the affirmative vote of the holders of a majority of the shares of Series A Preferred and Common given at a special meeting of such shareholders duly called or by an action by written consent for that purpose, and any such vacancy thereby created may be filled by the vote of the holders of a majority of the shares of the Series A Preferred and Common represented at such meeting or by an action by written consent of the holders of the Series A Preferred and Common. In the case of any vacancy in the office of the directors elected by the Series A, Series B, Series C and Series D Preferred and Common pursuant to this Section 6.2, a successor shall be elected to hold office for the unexpired term of such director by the affirmative vote of a majority of the shares of Series A, Series B, Series C and Series D Preferred and Common given at a special meeting of such shareholders duly called or by an action by written consent for that purpose. Subject to applicable law, a director who shall have been elected by the Series A, Series B, Series C and Series D Preferred and Common pursuant to this Section 6.2 may be removed during the aforesaid term of office, either for or without cause, by, and only by, the affirmative vote of the holders of a majority of the shares of Series A, Series B, Series C and Series D Preferred and Common given at a special meeting of such shareholders duly called or by an action by written consent for that purpose, and any vacancy thereby created may be filled by the vote of the holders of a majority of the shares of Series A, Series B, Series C and Series D Preferred and Common represented at such meeting or by an action by written consent of the holders of the Series A, Series B, Series C and Series D Preferred and Common.

Section 7. Covenants. In addition to any other rights provided by law, so long as any Series A, Series B, Series C or Series D Preferred shall be outstanding, this corporation shall not, without first obtaining the affirmative vote or written consent of the holders of not less than a majority of such outstanding shares of Series A and Series B Preferred, each voting separately as a class, and Series C and Series D Preferred, voting as a single class:

(a) amend or repeal any provision of, or add any provision to, this corporation's articles of incorporation or bylaws if such action would adversely alter or change the preferences,

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rights, privileges or powers of, or the restrictions provided for the benefit of, such series, or increase or decrease the number of shares of such series authorized hereby;

(b) authorize or issue shares of any class of stock not authorized herein having any preference or priority as to dividends or assets superior to or on a parity with any such preference or priority of such series, or authorize or issue any bonds, debentures, notes or other obligations convertible into or exchangeable for, or having option rights to purchase, any shares of Common or stock of this corporation not authorized herein.

(c) reclassify any Junior Shares into shares having any preference or priority as to dividends or assets superior to or on a parity with any such preference or priority of such series;

(d) pay or declare any dividend on any Junior Shares or Series A Preferred (except dividends payable solely in shares of Common) while the Series B, Series C or Series D Preferred remains outstanding, or apply any of its assets to the redemption, retirement, purchase or acquisition directly or indirectly, through subsidiaries or otherwise, of any Junior Shares, except from employees of this corporation upon termination of employment pursuant to the terms of restrictive stock agreements providing for the repurchase of such Junior Shares at cost entered into with such employees;

(e) authorize or take any action with respect to a liquidation or dissolution of the corporation, or with respect to a consolidation or merger with or into another corporation, or a sale of substantially all of the assets, where this corporation is not the surviving entity;

(f) issue any debt instrument, or otherwise borrow any money if, following such issuance or borrowing, the aggregate of all such indebtedness would increase the Company's indebtedness by more than $250,000 in any one calendar year;

(g) acquire another entity through asset acquisition, stock purchase or merger; or

(h) guarantee any indebtedness other than trade accounts arising from the normal course of business.

Section 8. Residual Rights. All rights accruing to the outstanding shares of this corporation not expressly provided for to the contrary herein shall be vested in the Common.

ARTICLE V.

The Corporation reserves the right to amend, alter, change, or repeal any provision contained in this Certificate of Incorporation, in the manner now or hereafter prescribed by statute, and all rights conferred upon the stockholders herein are granted subject to this right.

ARTICLE VI.

The Corporation is to have perpetual existence.

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ARTICLE VII.

1. Limitation of Liability. To the fullest extent permitted by the General Corporation Law of the State of Delaware as the same exists or as may hereafter be amended, a director of the Corporation shall not be personally liable to the corporation or its stockholders for monetary damages for breach of fiduciary duty as a director.

2. Indemnification. The corporation may indemnify to the fullest extent permitted by law any person made or threatened to be made a party to an action or proceeding, whether criminal, civil, administrative or investigative, by reason of the fact that such person or his or her testator or intestate is or was a director, officer or employee of the corporation, or any predecessor of the corporation, or serves or served at any other enterprise as a director, officer or employee at the request of the corporation or any predecessor to the corporation.

3. Amendments. Neither any amendment nor repeal of this Article VII, nor the adoption of any provision of the corporation's Certificate of Incorporation inconsistent with this Article VII, shall eliminate or reduce the effect of this Article VII, in respect of any matter occurring, or any action or proceeding accruing or arising or that, but for this Article VII, would accrue or arise, prior to such amendment, repeal, or adoption of an inconsistent provision.

ARTICLE VIII.

In furtherance and not in limitation of the powers conferred by statute, the Board of Directors is expressly authorized to make, alter, amend or repeal the Bylaws of the corporation.

ARTICLE IX.

Following the closing of a public offering pursuant to an effective registration statement under the Securities Act of 1933, as amended, covering any of the corporation's securities (as that term is defined under the Securities Act of 1933, as then in effect), no action shall be taken by the stockholders of the corporation except at an annual or special meeting of the stockholders called in accordance with the Bylaws of the corporation and no action shall be taken by the stockholders by written consent.

ARTICLE X.

Meetings of stockholders may be held within or without the State of Delaware, as the Bylaws may provide. The books of the Corporation may be kept (subject to any provision contained in the statutes) outside of the State of Delaware at such place or places as may be designated from time to time by the Board of Directors or in the Bylaws of the Corporation.

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ARTICLE XI.

At the election of directors of the Corporation, each holder of stock or of any class or series of stock shall be entitled to as many votes as shall equal the number of votes which such stockholder would be entitled to cast for the election of directors with respect to his or her shares of stock multiplied by the number of directors to be elected and may cast all such votes for any director or for any two or more of them as such stockholder may see fit.

ARTICLE XII.

The name and mailing address of the incorporator are:

Donna Moser
Wilson Sonsini Goodrich & Rosati 650 Page Mill Road
Palo Alto, California 94304-1050

* * *

The undersigned incorporator hereby acknowledges that the above Certificate of Incorporation of Natus Medical Incorporated is her act and deed and that the facts stated therein are true.

                                             /s/ Donna Moser
                                             ----------------------------------
                                             Donna Moser

Dated:  July 20, 2000

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EXHIBIT 3.1.1

RESTATED CERTIFICATE OF INCORPORATION

OF

NATUS MEDICAL INCORPORATED

Natus Medical Incorporated, a corporation organized and existing under laws of the State of Delaware, hereby certifies as follows:

1. The name of the Corporation is Natus Medical Incorporated. The original Certificate of Incorporation of the Corporation was filed with the Secretary of State of the State of Delaware on July __, 2000.

2 Pursuant to Sections 228, 242 and 245 of the General Corporation Laws of the State of Delaware, this Restated Certificate of Incorporation restates and integrates and further amends the provisions of the Certificate of Incorporation of this corporation.

3. The text of the Certificate of Incorporation as heretofore amended or supplemented is hereby amended and restated to read in its entirety as follows:

FIRST: The name of this corporation is Natus Medical Incorporated.

SECOND: The address of the corporation's registered office in the State of Delaware is 1209 Orange Street, City of Wilmington, County of New Castle, State of Delaware. The name of its registered agent at such address is The Corporation Trust Company.

THIRD: The purpose of this corporation is to engage in any lawful act or activity for which corporations may be organized under the General Corporation Law of Delaware.

FOURTH: This corporation is authorized to issue two classes of stock to be designated, respectively, "Common Stock" and "Preferred Stock." The total number of shares which the corporation is authorized to issue is 130,000,000 shares. 120,000,000 shares shall be Common Stock, par value $.001 per share, and 10,000,000 shares shall be Preferred Stock, par value $.001 per share.

The Preferred Stock may be issued from time to time in one or more series. The Board of Directors is authorized to fix the number of shares of any series of Preferred Stock and to determine the designation of any such series. The Board of Directors is also authorized to determine and alter the powers, rights, preferences and privileges and the qualifications, limitations and restrictions granted to or imposed upon any wholly unissued series of Preferred Stock and within the limitations or restrictions stated in any resolution or resolutions of the Board of Directors originally fixing the number of shares constituting any series, to increase or decrease (but not below the number of shares of such series then outstanding) the number of shares of any series subsequent to the issue of shares of that series, to determine the designation of any series, and to fix the number of shares of any series. In case the number of shares of any series shall be so decreased, the share constituting such


decrease shall resume the status that they had prior to the adoption of the resolution originally fixing the number of shares of such series.

FIFTH: "Qualified Public Offering" as used in this Certificate of Incorporation shall mean the corporation's initial firm commitment underwritten public offering pursuant to an effective registration under the Securities Act of 1933, as amended, covering the offer and sale of Common Stock for the account of the Corporation to the public. For the management of the business and for the conduct of the affairs of the corporation, and in further definition, limitation and regulation of the powers of the corporation, of its directors and of its stockholders or any class thereof, as the case may be, it is further provided that, effective upon the closing of a Qualified Public Offering:

1. The management of the business and the conduct of the affairs of the corporation shall be vested in its Board of Directors. The number of directors which shall constitute the whole Board of Directors shall be fixed exclusively by one or more resolutions adopted from time to time by the Board of Directors.

The Board of Directors shall be divided into three classes designated as Class I, Class II and Class III, respectively. Directors shall be assigned to each class in accordance with a resolution or resolutions adopted by the Board of Directors. At the first annual meeting of stockholders following the date hereof, the term of office of the Class I directors shall expire and Class I directors shall be elected for a full term of three years. At the second annual meeting of stockholders following the date hereof, the term of office of the Class II directors shall expire and Class II directors shall be elected for a full term of three years. At the third annual meeting of stockholders following the date hereof, the term of office of the Class III directors shall expire and Class III directors shall be elected for a full term of three years. At each succeeding annual meeting of stockholders, directors shall be elected for a full term of three years to succeed the directors of the class whose terms expire at such annual meeting. Each holder of voting stock or of any class or series thereof shall be entitled to cumulative voting rights as to the directors to be elected by each series or class or the combined classes in accordance with the provisions of Section 214 of the Delaware General Corporation Law.

Notwithstanding the foregoing provisions of this Article FIFTH, each director shall serve until his or her successor is duly elected and qualified or until his or her death, resignation or removal. No decrease in the number of directors constituting the Board of Directors shall shorten the term of any incumbent director.

Any vacancies on the Board of Directors resulting from death, resignation, disqualification, removal, or other causes shall be filled by either (i) the affirmative vote of the holders of a majority of the voting power of the then- outstanding shares of voting stock of the corporation entitled to vote generally in the election of directors (the "Voting Stock") voting together as a single class; or (ii) by the affirmative vote of a majority of the remaining directors then in office, even though less than a quorum of the Board of Directors. Newly created directorships resulting from any increase in the number of directors shall, unless the Board of Directors determines by resolution that any such newly created directorship shall be filled by the stockholders, be filled only by the affirmative vote of the directors then in office, even though less than a quorum of the Board of Directors. Any director elected in accordance with the preceding sentence shall hold office for the remainder of the

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full term of the class of directors in which the new directorship was created or the vacancy occurred and until such director's successor shall have been elected and qualified.

2. In furtherance and not in limitation of the powers conferred by statute, the Board of Directors is expressly authorized to make, alter, amend, or repeal the Bylaws of the corporation.

3. The directors of the corporation need not be elected by written ballot unless a stockholder demands election by written ballot at the meeting and before voting begins, or unless the Bylaws so provide.

4. The affirmative vote of sixty-six and two-thirds percent (66-2/3%) of the voting power of the then outstanding shares of Voting Stock, voting together as a single class, shall be required for the adoption, amendment or repeal of the following sections of the corporation's Bylaws by the stockholders of this corporation: 2.3 (Annual Meeting) and 2.4 (Special Meeting).

5. No action shall be taken by the stockholders of the corporation except at an annual or special meeting of the stockholders called in accordance with the Bylaws.

6. Advance notice of stockholder nomination for the election of directors and of business to be brought by stockholders before any meeting of the stockholders of the corporation shall be given in the manner provided in the Bylaws of the corporation.

7. Any director, or the entire Board of Directors, may be removed from office at any time (i) with cause by the affirmative vote of the holders of at least a majority of the voting power of all of the then-outstanding shares of the Voting Stock, voting together as a single class; or (ii) without cause by the affirmative vote of the holders of at least sixty-six and two-thirds percent (66-2/3%) of the voting power of all of the then-outstanding shares of the Voting Stock.

SIXTH: Notwithstanding any other provision in this Certificate of Incorporation or in any provision of law which might otherwise permit a lesser vote or no vote, but in addition to any affirmative vote of the holders of any particular class or series of the Voting Stock required by law, this Certificate of Incorporation or any Preferred Stock Designation, the affirmative vote of the holders of at least sixty-six and two-thirds percent (66-2/3%) of the voting power of all of the then-outstanding shares of the Voting Stock, voting together as a single class, shall be required to alter, amend or repeal Article FIFTH or this Article SIXTH.

SEVENTH: The corporation reserves the right to amend, alter, change or repeal any provision contained in this Certificate of Incorporation, in the manner now or hereafter prescribed by statute, except as provided in Article SIXTH of this Certificate, and all rights conferred upon the stockholders herein are granted subject to this right.

EIGHTH:

1. To the fullest extent permitted by the Delaware General Corporation Law as the same exists or as may hereafter be amended, a director of the corporation shall not be personally liable to the Corporation or its stockholders for monetary damages for breach fiduciary duty as a director.

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2. The corporation may indemnify to the fullest extent permitted by law any person made or threatened to be made a party to an action or proceeding, whether criminal, civil, administrative or investigative, by reason of the fact that he or she, his or her testator or intestate is or was a director, officer or employee of the corporation or any predecessor of the corporation or serves or served at any other enterprise as a director, officer or employee at the request of the corporation or any predecessor to the corporation.

3. Neither an amendment nor repeal of this Article I, nor the adoption of any provision of the corporation's Certificate of Incorporation inconsistent with this Article EIGHTH, shall eliminate or reduce the effect of this Article EIGHTH, in respect of any matter occurring, or any action or proceeding accruing or arising or that, but for this Article EIGHTH, would accrue or arise, prior to such amendment, repeal, or adoption of an inconsistent provision.

NINTH: Meetings of stockholders may be held within or without the State of Delaware, as the Bylaws may provide. The books of the corporation may be kept (subject to any provision contained in the statutes) outside of the State of Delaware at such place or places as may be designated from time to time by the Board of Directors or in the Bylaws of the corporation.

The foregoing Restated Certificate of Incorporation has been duly approved by the Board of Directors.

The foregoing Restated Certificate of Incorporation has been duly approved by the required vote of stockholders in accordance with Section 228 of the Delaware General Corporation Law. The total number of outstanding shares of the Corporation is _________ shares of Common Stock. The number of shares voting in favor of the amendment equaled or exceeded the vote required. The percentage vote required was more than 50% of the Common Stock.

[Remainder of Page Left Blank Intentionally]

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IN WITNESS WHEREOF, this Restated Certificate of Incorporation has been signed this ____ day of __________, 2000.

NATUS MEDICAL INCORPORATED

By: ______________________________________
Tim C. Johnson
President, Chief Executive Officer and
Chief Operating Officer

ATTEST:


William H. Lawrenson,
Assistant Secretary

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EXHIBIT 3.2

BYLAWS

OF

NATUS MEDICAL INCORPORATED

Article 1
Offices

Section 1.1. Registered Office. The registered office of the Corporation which is required by the state of Delaware to be maintained in the state of Delaware shall be the registered office named in the charter documents of the Corporation, or such other office as may be designated from time to time by the Board of Directors in the manner provided by law.

Section 1.2. Other Offices. The Corporation may also have offices at such other places both within and without the state of Delaware as the Board of Directors may from time to time determine or the business of the Corporation may require.

Article 2 Stockholders

Section 2.1. Place of Meetings. All meetings of the stockholders shall be held at the principal office of the Corporation, or at such other place within or without the state of Delaware as shall be specified or fixed in the notices or waivers of notice thereof.

Section 2.2. Quorum; Adjournment of Meetings. Unless otherwise required by law or provided in the charter documents of the Corporation or these Bylaws,
(i) the holders of a majority of the stock issued and outstanding and entitled to vote thereat, present in person or represented by proxy, shall constitute a quorum at any meeting of stockholders for the transaction of business, (ii) in all matters other than election of directors, the affirmative vote of the holders of a majority of such stock so present or represented at any meeting of stockholders at which a quorum is present shall constitute the act of the stockholders, and (iii) where a separate vote by a class or classes is required, a majority of the outstanding shares of such class or classes, present in person or represented by proxy shall constitute a quorum entitled to take action with respect to that vote on that matter and the affirmative vote of the majority of the shares of such class or classes present in person or represented by proxy at the meeting shall be the act of such class. The stockholders present at a duly organized meeting may continue to transact business until adjournment, notwithstanding the withdrawal of enough stockholders to leave less than a quorum, subject to the provisions of clauses (ii) and (iii) above.

Directors shall be elected by a plurality of the votes of the shares present in person or represented by proxy at the meeting and entitled to vote on the election of directors.


Notwithstanding the other provisions of the charter documents of the Corporation or these Bylaws, the chairman of the meeting or the holders of a majority of the issued and outstanding stock, present in person or represented by proxy and entitled to vote thereat, at any meeting of stockholders, whether or not a quorum is present, shall have the power to adjourn such meeting from time to time, without any notice other than announcement at the meeting of the time and place of the holding of the adjourned meeting. If the adjournment is for more than thirty (30) days, or if after the adjournment a new record date is fixed for the adjourned meeting, a notice of the adjourned meeting shall be given to each stockholder of record entitled to vote at such meeting. At such adjourned meeting at which a quorum shall be present or represented any business may be transacted which might have been transacted at the meeting as originally called.

Section 2.3. Annual Meeting.
(a) An annual meeting of the stockholders, for the election of directors to succeed those whose terms expire and for the transaction of such other business as may properly come before the meeting, shall be held at such place (within or without the state of Delaware), on such date, and at such time as the Board of Directors shall fix and set forth in the notice of the meeting, which date shall be within thirteen (13) months subsequent to the last annual meeting of stockholders.

(b) At an annual meeting of stockholders, only such business shall be conducted as shall have been properly brought before the meeting. To be properly brought before an annual meeting, business must be: (A) specified in the notice of meeting (or any supplement thereto) given by or at the direction of the Board of Directors, (B) otherwise properly brought before the meeting by or at the direction of the Board of Directors, or (C) otherwise properly brought before the meeting by a stockholder. For business to be properly brought before an annual meeting by a stockholder, the stockholder must have given timely notice thereof in writing to the Secretary of the Corporation. To be timely, a stockholder's notice must be delivered to or mailed and received at the principal executive offices of the Corporation not less than sixty (60) calendar days in advance of the date specified in the Corporation's proxy statement released to stockholders in connection with the previous year's annual meeting of stockholders; provided, however, that in the event that no annual meeting was held in the previous year or the date of the annual meeting has been changed by more than thirty (30) days from the date contemplated at the time of the previous year's proxy statement, notice by the stockholder to be timely must be so received a reasonable time before the solicitation is made. A stockholder's notice to the Secretary shall set forth as to each matter the stockholder proposes to bring before the annual meeting: (i) a brief description of the business desired to be brought before the annual meeting and the reasons for conducting such business at the annual meeting, (ii) the name and address, as they appear on the Corporation's books, of the stockholder proposing such business, (iii) the class and number of shares of the Corporation which are beneficially owned by the stockholder, (iv) any material interest of the stockholder in such business and (v) any other information that is required to be provided by the stockholder pursuant to Regulation 14A under the Securities Exchange Act of 1934, as amended (the "1934 Act"), in his capacity as a proponent to a stockholder proposal. Notwithstanding the foregoing, in order to include information with respect to a stockholder proposal in the proxy statement and form of proxy for a stockholder's meeting, stockholders must provide notice as required by the regulations promulgated under the 1934 Act. Notwithstanding anything in these Bylaws to the contrary, no

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business shall be conducted at any annual meeting except in accordance with the procedures set forth in this paragraph (b). The chairman of the annual meeting shall, if the facts warrant, determine and declare at the meeting that business was not properly brought before the meeting and in accordance with the provisions of this paragraph (b), and, if he should so determine, he shall so declare at the meeting that any such business not properly brought before the meeting shall not be transacted.

(c) Only persons who are nominated in accordance with the procedures set forth in this paragraph (c) shall be eligible for election as Directors. Nominations of persons for election to the Board of Directors of the Corporation may be made at a meeting of stockholders by or at the direction of the Board of Directors or by any stockholder of the Corporation entitled to vote in the election of Directors at the meeting who complies with the notice procedures set forth in this paragraph (c). Such nominations, other than those made by or at the direction of the Board of Directors, shall be made pursuant to timely notice in writing to the Secretary of the Corporation in accordance with the provisions of paragraph (b) of this Section 2.2. Such stockholder's notice shall set forth
(i) as to each person, if any, whom the stockholder proposes to nominate for election or re-election as a Director: (A) the name, age, business address and residence address of such person, (B) the principal occupation or employment of such person, (C) the class and number of shares of the Corporation which are beneficially owned by such person, (D) a description of all arrangements or understandings between the stockholder and each nominee and any other person or persons (naming such person or persons) pursuant to which the nominations are to be made by the stockholder, and (E) any other information relating to such person that is required to be disclosed in solicitations of proxies for elections of Directors, or is otherwise required, in each case pursuant to Regulation 14A under the 1934 Act (including without limitation such person's written consent to being named in the proxy statement, if any, as a nominee and to serving as a Director if elected); and (ii) as to such stockholder giving notice, the information required to be provided pursuant to paragraph (b) of this Section 2.2. At the request of the Board of Directors, any person nominated by a stockholder for election as a Director shall furnish to the Secretary of the Corporation that information required to be set forth in the stockholder's notice of nomination, which pertains to the nominee. No person shall be eligible for election as a Director of the Corporation unless nominated in accordance with the procedures set forth in this paragraph (c). The chairman of the meeting shall, if the facts warrants, determine and declare at the meeting that a nomination was not made in accordance with the procedures prescribed by these Bylaws, and if he should so determine, he shall so declare at the meeting, and the defective nomination shall be disregarded.

Section 2.4. Special Meetings. Special meetings of stockholders may be called at any time by a majority of the Board of Directors, by the Chairman of the Board, the Chief Executive Officer or by the holders of at least 10% of the shares of the Corporation's capital stock entitled to vote at such meeting, but such special meetings may not be called by any other person or persons; provided, however, that effective upon closing of the Corporation's initial public offering pursuant to an effective registration statement under the Securities Act of 1933, as amended, covering the offer and sale of shares of its Common Stock for the account of the Corporation to the public (the "IPO") and the Corporation is no longer subject to Section 2115 of the California Corporation Code, special

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meetings of stockholders may be called at any time by a majority of the Board of Directors, by the Chairman of the Board, by the Chief Executive Officer or by the holders of at least 30% of the shares of the Corporation's capital stock entitled to vote at such meeting, but such special meetings may not be called by any other person or persons.

Section 2.5. Record Date. For the purpose of determining stockholders entitled to notice of or to vote at any meeting of stockholders, or any adjournment thereof, or entitled to receive payment of any dividend or other distribution or allotment of any rights, or entitled to exercise any rights in respect of any change, conversion or exchange of stock or for the purpose of any other lawful action, the Board of Directors of the Corporation may fix a date as the record date for any such of stockholders, which record date shall not precede the date on which the resolutions fixing the record date are adopted and which record date shall not be more than sixty (60) days nor less than ten (10) days before the date of such meeting of stockholders, nor more than sixty (60) days prior to any other action to which such record date relates.

If the Board of Directors does not fix a record date for any meeting of the stockholders, the record date for determining stockholders entitled to notice of or to vote at such meeting shall be at the close of business on the day next preceding the day on which notice is given, or, in accordance with Article 7,
Section 7.3 of these Bylaws notice is waived, at the close of business on the day next preceding the day on which the meeting is held. The record date for determining stockholders for any other purpose (other than the consenting to corporate action in writing without a meeting) shall be at the close of business on the day on which the Board of Directors adopts the resolution relating thereto. A determination of stockholders of record entitled to notice of or to vote at a meeting of stockholders shall apply to any adjournment of the meeting; provided, however, that the Board of Directors may fix a new record date for the adjourned meeting.

For the purpose of determining the stockholders entitled to consent to corporate action in writing without a meeting, the Board of Directors may fix a record date, which record date shall not precede the date upon which the resolution fixing the record date is adopted by the Board of Directors, and which date shall not be more than ten (10) days after the date upon which the resolution fixing the record date is adopted by the Board of Directors. If the Board of Directors does not fix the record date, the record date for determining stockholders entitled to consent to corporate action in writing without a meeting, when no prior action by the Board of Directors is necessary, shall be the first date on which a signed written consent setting forth the action taken or proposed to be taken is delivered to the Corporation at its registered office in the state of incorporation of the Corporation or at its principal place of business. If the Board of Directors does not fix the record date, and prior action by the Board of Directors is necessary, the record date for determining stockholders entitled to consent to corporate action in writing without a meeting shall be at the close of business on the day on which the Board of Directors adopts the resolution taking such prior action.

Section 2.6. Notice of Meetings. Written notice of the place, date and hour of all meetings, and, in case of a special meeting, the purpose or purposes for which the meeting is called, shall be given by or at the direction of the President, the Secretary or the other person(s) calling the meeting to each stockholder entitled to vote thereat not less than ten (10) nor more than sixty
(60) days before the date of the meeting. Such notice may be delivered either personally or by mail.

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If mailed, notice is given when deposited in the United States mail, postage prepaid, directed to the stockholder at such stockholder's address as it appears on the records of the Corporation.

Section 2.7. Stockholder List. A complete list of stockholders entitled to vote at any meeting of stockholders, arranged in alphabetical order for each class of stock and showing the address of each such stockholder and the number of shares registered in the name of such stockholder, shall be open to the examination of any stockholder, for any purpose germane to the meeting, during ordinary business hours, for a period of at least ten (10) days prior to the meeting, either at a place within the city where the meeting is to be held, which place shall be specified in the notice of the meeting, or, if not so specified, at the place where the meeting is to be held. The stockholder list shall also be produced and kept at the time and place of the meeting during the whole time thereof, and may be inspected by any stockholder who is present.

Section 2.8. Proxies. Each stockholder entitled to vote at a meeting of stockholders or to express consent or dissent to a corporate action in writing without a meeting may authorize another person or persons to act for him by proxy. Proxies for use at any meeting of stockholders shall be filed with the Secretary, or such other officer as the Board of Directors may from time to time determine by resolution, before or at the time of the meeting. All proxies shall be received and taken charge of and all ballots shall be received and canvassed by the secretary of the meeting, who shall decide all questions touching upon the qualification of voters, the validity of the proxies, and the acceptance or rejection of votes, unless an inspector or inspectors shall have been appointed by the chairman of the meeting, in which event such inspector or inspectors shall decide all such questions.

No proxy shall be valid after three (3) years from its date, unless the proxy provides for a longer period. Each proxy shall be revocable unless expressly provided therein to be irrevocable and coupled with an interest sufficient in law to support an irrevocable power.

Should a proxy designate two or more persons to act as proxies, unless such instrument shall provide the contrary, a majority of such persons present at any meeting at which their powers thereunder are to be exercised shall have and may exercise all the powers of voting or giving consents thereby conferred, or if only one be present, then such powers may be exercised by that one; or, if an even number attend and a majority do not agree on any particular issue, each proxy so attending shall be entitled to exercise such powers in respect of such portion of the shares as is equal to the reciprocal of the fraction equal to the number of proxies representing such shares divided by the total number of shares represented by such proxies.

Section 2.9. Voting; Election; Inspectors. Unless otherwise required by law or provided for in the charter documents of the Corporation, each stockholder shall on each matter submitted to a vote at a meeting of stockholders have one vote for each share of the stock entitled to vote which is registered in his name on the record date for the meeting. For the purposes hereof, each election to fill a directorship shall constitute a separate matter. Shares registered in the name of another corporation, domestic or foreign, may be voted by such officer, agent or proxy as the bylaws (or comparable body) of such corporation may determine. Shares registered in the name of a deceased person may be voted by the executor or administrator of such person's estate, either in person or by proxy.

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All voting, except as required by the charter documents of the Corporation or where otherwise required by law, may be by a voice vote; provided, however, upon request of the chairman of the meeting or upon demand therefor by stockholders holding a majority of the issued and outstanding stock present in person or by proxy at any meeting a stock vote shall be taken. Every stock vote shall be taken by written ballots, each of which shall state the name of the stockholder or proxy voting and such other information as may be required under the procedure established for the meeting. The directors of the Corporation need not be elected by written ballot unless a stockholder demands election by written ballot at the meeting and before voting begins, or unless the Bylaws so provide.

At any meeting at which a vote is taken by written ballots, the chairman of the meeting may appoint one or more inspectors; each of whom shall subscribe an oath or affirmation to execute faithfully the duties of inspector at such meeting with strict impartiality and according to the best of such inspector's ability. Such inspector shall receive the written ballots, count the votes, and make and sign a certificate of the result thereof. The chairman of the meeting may appoint any person to serve as inspector, except no candidate for the office of director shall be appointed as an inspector.

Each holder of voting stock or of any class or series thereof shall be entitled to cumulative voting rights as to the directors to be elected by each series or class or the combined classes in accordance with the provisions of
Section 214 of the Delaware General Corporation Law.

Section 2.10. Conduct of Meetings. The meetings of the stockholders shall be presided over by the President, or, if the President is not present, by a chairman elected at the meeting. The Secretary of the Corporation, if present, shall act as secretary of such meetings, or, if the Secretary is not present, an Assistant Secretary shall so act; if neither the Secretary of or Assistant Secretary is present, then a secretary shall be appointed by the chairman of the meeting.

The chairman of any meeting of stockholders shall determine the order of business and the procedure at the meeting, including such regulation of the manner of voting and the conduct of discussion as seem to the chairman in order.

Section 2.11. Treasury Stock. The Corporation shall not vote, directly or indirectly, shares of its own stock owned by it and such shares shall not be counted for quorum purposes. Nothing in this Section 2.11 shall be construed as limiting the right of the Corporation to vote stock, including but not limited to its own stock, held by it in a fiduciary capacity.

Section 2.12. Action Without Meeting. Unless otherwise provided in the Certificate of Incorporation, any action which may be taken at any annual or special meeting of stockholders may be taken without a meeting and without prior notice, if a consent in writing, setting forth the action so taken, is signed by the holders of outstanding shares having not less than the minimum number of votes that would be necessary to authorize or take that action at a meeting at which all shares entitled to vote on that action were present and voted.

Prompt notice of the taking of the corporate action without a meeting by less than unanimous written consent shall be given to those stockholders who have not consented in writing. If the action which is consented to is such as would have required the filing of a certificate under

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any section of the General Corporation Law of Delaware if such action had been voted on by stockholders at a meeting thereof, then the certificate filed under such section shall state, in lieu of any statement required by such section concerning any vote of stockholders, that written notice and written consent have been given as provided in Section 228 of the General Corporation Law of Delaware.

Effective upon the closing of the Corporation's IPO and the date that the Corporation is no longer subject to Section 2115 of the California Corporations Code, no action of stockholders shall be taken by the stockholders except at an annual or special meeting of stockholders called in accordance with the notice requirements of Section 2.6 above and no action of the stockholders shall be taken by written consent.

Article 3 Board of Directors

Section 3.1. Power; Number; Term of Office. The business and affairs of the Corporation shall be managed by or under the direction of the Board of Directors, and, subject to the restrictions imposed by law or the charter documents of the Corporation, the Board of Directors may exercise all the powers of the Corporation.

Notwithstanding anything contained in these Bylaws to the contrary, at any time that a valid agreement among the stockholders is in force with respect to the nomination, election and removal of directors or similar matters, such agreement is hereby recognized and directors shall be nominated, elected and removed in accordance therewith.

The number of directors which shall constitute the whole Board of Directors shall be determined from time to time by the Board of Directors (provided that no decrease in the number of directors which would have the effect of shortening the term of an incumbent director may be made by the Board of Directors). Each director shall hold office for the term for which such director is elected, and until such director's successor shall have been elected and qualified or until such director's earlier death, resignation or removal.

Unless otherwise provided in the charter documents of the Corporation, directors need not be stockholders nor resident of the state of Delaware.

Section 3.2. Classes of Directors. Effective upon the closing of the Corporation's IPO and the date that the Corporation is no longer subject to
Section 2115 of the California Corporations Code, the Directors shall be divided into three classes designated as Class I, Class II and Class III, respectively. Directors shall be assigned to each class in accordance with a resolution or resolutions adopted by the Board of Directors. At the first annual meeting of stockholders following the closing of the IPO, the term of office of the Class I Directors shall expire and Class I Directors shall be elected for a full term of three years. At the second annual meeting of stockholders following the closing of the IPO, the term of office of the Class II Directors shall expire and Class II Directors shall be elected for a full term of three years. At the third annual meeting of stockholders following the closing of the Initial Public Offering, the term of office of the Class III Directors shall expire and Class III Directors shall be elected for a full term of three years. At each succeeding annual meeting

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of stockholders, Directors shall be elected for a full term of three years to succeed the Directors of the class whose terms expire at such annual meeting.

Notwithstanding the foregoing provisions of this Article, each Director shall serve until his successor is duly elected and qualified or until his earlier death, resignation or removal. No decrease in the number of Directors constituting the Board of Directors shall shorten the term of any incumbent Director.

Section 3.3. Quorum; Voting. Unless otherwise provided in the charter documents of the Corporation, a majority of the number of directors then in office shall constitute a quorum for the transaction of business of the Board of Directors and the vote of a majority of the directors present at a meeting at which a quorum is present shall be the act of the Board of Directors.

Section 3.4. Place of Meetings; Order of Business. The directors may hold their meetings and may have an office and keep the books of the Corporation, except as otherwise provided by law, in such place or places, within or without the state of incorporation of the Corporation, as the Board of Directors may from time to time determine. At all meetings of the Board of Directors business shall be transacted in such order as shall from time to time be determined by the President or by the Board of Directors.

Section 3.5. First Meeting. Each newly elected Board of Directors may hold its first meeting for the purpose of organization and the transaction of business, if a quorum is present, immediately after and at the same place as the annual meeting of the stockholders. Notice of such meeting shall not be required. At the first meeting of the Board of Directors in each year at which a quorum shall be present, held after the annual meeting of stockholders, the Board of Directors shall elect the officers of the Corporation.

Section 3.6. Regular Meetings. Regular meetings of the Board of Directors shall be held at such times and places as shall be designated from time to time by the President, or in the President's absence, by another officer of the Corporation. Notice of such regular meetings shall not be required.

Section 3.7. Special Meetings. Special meetings of the Board of Directors may be called by the President, or on the written request of any director, by the Secretary, in each case on at least twenty-four (24) hours' personal, written, telegraphic, cable or wireless notice to each director. Such notice, or any waiver thereof pursuant to Article 7, Section 7.3 hereof, need not state the purpose or purposes of such meeting, except as may otherwise be required by law or provided for in the charter documents of the Corporation or these Bylaws. Meetings may be held at any time without notice if all the directors are present or if those not present waive notice of the meeting in writing.

Section 3.8. Removal. Any director or the entire Board of Directors may be removed as set forth in the Certificate of Incorporation of the Corporation, as amended from time to time.

Section 3.9. Vacancies; Increases in the Number of Directors. Any director may resign effective on giving written notice to the chairman of the board, the president, the secretary or the board of directors, unless the notice specifies a later time for that resignation to become effective. If

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the resignation of a director is effective at a future time, the board of directors may elect a successor to take office when the resignation becomes effective.

Unless otherwise provided in the Certificate of Incorporation or these bylaws, vacancies in the board of directors may be filled by a majority of the remaining directors, even if less than a quorum, or by a sole remaining director; however, a vacancy created by the removal of a director by the vote or written consent of the stockholders or by court order may be filled only by the affirmative vote of a majority of the shares represented and voting at a duly held meeting at which a quorum is present (which shares voting affirmatively also constitute a majority of the required quorum), or by the unanimous written consent of all shares entitled to vote thereon. Each director so elected shall hold office until the next annual meeting of the stockholders and until a successor has been elected and qualified. Notwithstanding the foregoing, however, effective upon the closing of the Corporation's IPO and the date that the Corporation is no longer subject to Section 2115 of the California Corporations Code, the number of directors which shall constitute the whole Board of Directors shall be fixed exclusively by one or more resolutions adopted from time to time by the Board of Directors.

Unless otherwise provided in the Certificate of Incorporation or these bylaws:

(i) Vacancies and newly created directorships resulting from any increase in the authorized number of directors elected by all of the stockholders having the right to vote as a single class may be filled by a majority of the directors then in office, although less than a quorum, or by a sole remaining director.

(ii) Whenever the holders of any class or classes of stock or series thereof are entitled to elect one or more directors by the provisions of the certificate of incorporation, vacancies and newly created directorships of such class or classes or series may be filled by a majority of the directors elected by such class or classes or series thereof then in office, or by a sole remaining director so elected.

If at any time, by reason of death or resignation or other cause, the Corporation should have no directors in office, then any officer or any stockholder or an executor, administrator, trustee or guardian of a stockholder, or other fiduciary entrusted with like responsibility for the person or estate of a stockholder, may call a special meeting of stockholders in accordance with the provisions of the certificate of incorporation or these bylaws, or may apply to the Court of Chancery for a decree summarily ordering an election as provided in Section 211 of the General Corporation Law of Delaware.

If, at the time of filling any vacancy or any newly created directorship, the directors then in office constitute less than a majority of the whole board (as constituted immediately prior to any such increase), then the Court of Chancery may, upon application of any stockholder or stockholders holding at least ten (10) percent of the total number of the shares at the time outstanding having the right to vote for such directors, summarily order an election to be held to fill any such vacancies or newly created directorships, or to replace the directors chosen by the directors then in office as aforesaid, which election shall be governed by the provisions of Section 211 of the General Corporation Law of Delaware as far as applicable.

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Section 3.10. Compensation. Directors and members of standing committees may receive such compensation as the Board of Directors from time to time shall determine to be appropriate, and shall be reimbursed for all reasonable expenses incurred in attending and returning from meetings of the board of Directors.

Section 3.11. Action Without a Meeting: Telephone Conference Meeting. Unless otherwise restricted by the charter documents of the Corporation, any action required or permitted to be taken at any of the Board of Directors or any committee designated by the Board of Directors may be taken without a meeting if all members of the Board of Directors or committee, as the case may be, consent thereto in writing, and the writing or writings are filed with the minutes of proceedings of the Board of Directors or committee. Such consent shall have the same force and effect as a unanimous vote at a meeting, and may be stated as such in any document or instrument filed with the Secretary of State of the state of incorporation of the Corporation.

Unless otherwise restricted by the charter documents of the Corporation, subject to the requirement for notice of meetings, members of the Board of Directors, or members of any committee designated by the Board of Directors, may participate in a meeting of such Board of Directors or committee, as the case may be, by means of a conference telephone connection or similar communications equipment by means of which all persons participating in the meeting can hear each other, and participation in such a meeting shall constitute presence in person at such meeting, except where a person participates in the meeting for the express purpose of objecting to the transaction of any business on the ground that the meeting is not lawfully called or convened.

Section 3.12. Approval or Ratification of Acts or Contracts by Stockholders. The Board of Directors in its discretion may submit any act or contract for approval or ratification at any annual meeting of the stockholders, or at any special meeting of the stockholders called for the purpose of considering any such act or contract, and any act or contract that shall be approved or be ratified by the vote of the stockholders holding a majority of the issued and outstanding shares of stock of the Corporation entitled to vote and present in person or by proxy at such meeting (provided that a quorum is present) shall be as valid and as binding upon the Corporation and upon all the stockholders as if it has been approved or ratified by every stockholder of the Corporation. In addition, any such act or contract may be approved or ratified by the written consent of stockholders holding a majority of the issued and outstanding shares of capital stock of the Corporation entitled to vote, and such consent shall be as valid and binding upon the Corporation and upon all the stockholders as if it had been approved or ratified by every stockholder of the Corporation.

Article 4 Committees

Section 4.1. Designation; Powers. The Board of Directors may, by resolution passed by a majority of the board, designate one or more committees, including, if they shall so determine, an executive committee and a compensation committee, with each such committee to consist of one or more of the directors of the Corporation. Any such designated committee shall have and may exercise such of the powers and authority of the Board of Directors in the management of the business and affairs of the Corporation as may be provided in such resolution, except that no such committee shall have the power or authority of the Board of Directors in reference of amending the

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charter documents of the Corporation, adopting an agreement of merger or consolidation, recommending to the stockholders the sale, lease or exchange of all or substantially all of the Corporation's property and assets, recommending to the stockholders a dissolution of the Corporation or a revocation of a dissolution of the Corporation, or amending, altering or repealing these Bylaws or adopting new bylaws for the Corporation. Any such designated committee may authorize the seal of the Corporation to be affixed to all papers, which may require it. In addition to the above, such committee or committees shall have such other powers and limitations of authority as may be determined from time to time by the Board of Directors.

Section 4.2. Procedure; Meetings; Quorum. Any committee designated pursuant to this Article 4 shall keep regular minutes of its actions and proceedings in a book provided for that purpose and report the same to the Board of Directors at its meeting next succeeding such action, shall fix its own rules or procedures, and shall meet at such times and at such place or places as may be provided by such rules, or by such committee or the board of Directors. Should a committee fail to fix its own rules, the provisions of these Bylaws, pertaining to the calling of meetings and conduct of business by the Board of Directors, shall apply as nearly as may be possible. At every meeting of any such committee, the presence of a majority of all the members thereof shall constitute a quorum, except as provided in Section 4.3 of this Article 4 and the affirmative vote of a majority of the members present shall be necessary for the adoption by it of any resolution.

Section 4.3. Substitution and Removal of Members: Vacancies. The Board of Directors may designate one or more directors as alternate members of any committee, who may replace any absent or disqualified member at any meeting of such committee. In the absence or disqualification of a member of a committee, the member or members present at any meeting and not disqualified from voting, whether or not constituting a quorum, may unanimously appoint another member of the Board of Directors to act at the meeting in the place of the absent or disqualified member. The Board of Directors shall have the power at any time to remove any member(s) of a committee and to appoint other directors in lieu of the person(s) so removed and shall also have the power to fill vacancies in a committee.

Article 5 Officers

Section 5.1. Number, Titles, and Term of Office. The officers of the Corporation shall be a President, Treasurer, a Secretary, and such other officers as the Board of Directors may from time to time elect or appoint (including, but not limited to, a Chairman of the Board, and or more Vice Presidents, (anyone or more of whom may be designated Executive Vice President or Senior Vice President) Vice Chairman of the Board, one or more Assistant Secretaries and one or more Assistant Treasurers). Each officer shall hold office until such officer's successor shall be duly elected and shall qualify or until such officer's death or until such officer shall resign or shall have been removed. Any number of offices may be held by the same person, unless the Articles of Incorporation of the Corporation provide otherwise. Except for the Chairman of the Board and the Vice Chairman of the Board, no officer need be a director.

Section 5.2. Powers and Duties of the President. The President shall be the chief executive officer of the Corporation. Subject to the control of the Board of Directors and the Executive

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Committee (if any), the President shall have general executive charge, management and control of the properties, business and operations of the Corporation with all such powers as may be reasonably incident to such responsibilities; may agree upon and execute all leases, contracts, evidences of indebtedness and other obligations in the name of the Corporation and may sign all certificates for shares of capital stock of the Corporation; and shall have such other powers and duties as designated in accordance with these Bylaws and as from time to time may be assigned to the President by the Board of Directors. The President shall preside at all meetings of the stockholders and of the Board of Directors.

Section 5.3. Vice Presidents. Each Vice President shall at all times possess power to sign all certificates, contracts and other instruments of the Corporation, except as otherwise limited in writing by the Chairman of the Board, the President or the Vice Chairman of the Board of the Corporation. Each Vice President shall have such other powers and duties as from time to time may be assigned to such Vice President by the Board of Directors, the Chairman of the Board, the President or the Vice Chairman of the Board.

Section 5.4. Secretary. The Secretary shall keep the minutes of all meetings of the Board of Directors, committees of the Board of Directors and the stockholders, in books provided for that purpose; shall attend to the giving and serving of all notices; may in the name of the Corporation affix the seal of the Corporation to all contracts and attest the affixation of the seal of the Corporation thereto; may sign with the other appointed officers all certificates for shares of capital stock of the Corporation; shall have charge of the certificate books, transfer books and stock ledgers, and such other books and papers as the Board of Directors may direct, all of which shall at all reasonable times be open to inspection of any director upon application at the office of the Corporation during business hours; shall have such other powers and duties as designated in these Bylaws and as from time to time may be assigned to the Secretary by the Board of Directors, the Chairman of the Board, the President or the Vice Chairman of the Board; and shall in general perform all acts incident of the office of Secretary, subject to the control of the Board of Directors, the Chairman of the Board, the President or the Vice Chairman of the Board.

Section 5.5. Assistant Secretaries. Each Assistant Secretary shall have the usual powers and duties pertaining to such offices, together with such other powers and duties as designated in these Bylaws and as from time to time may be assigned to an Assistant Secretary by the board of directors, the President, or the Secretary. The Assistant Secretaries shall exercise the powers of the Secretary during that officer's absence or inability or refusal to act.

Section 5.6. Treasurer. The Treasurer shall have responsibility for the custody and control of all the funds and securities of the Corporation, and shall have such other powers and duties as designated in these Bylaws and as from time to time may be assigned to the Treasurer by the Board of Directors or the President. The Treasurer shall perform all acts incident to the position of Treasurer, subject to the control of the Board of Directors or the President; and the Treasurer shall, if required by the Board of Directors, give such bond for the faithful discharge of the Treasurer's duties in such form as the Board of Directors may require.

Section 5.7. Assistant Treasurers. Each Assistant Treasurer shall have the usual powers and duties pertaining to such office, together with such other powers and duties as designated in

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these Bylaws and as from time to time may be assigned to each Assistant Treasurer by the Board of Directors, the President, or the Treasurer. The Assistant Treasurers shall exercise the powers of the Treasurer during that officer's absence or inability or refusal to act.

Section 5.8. Action with Respect to Securities of Other Corporations. Unless otherwise directed by the Board of Directors, the President, together with the Secretary or any Assistant Secretary shall have power to vote and otherwise act on behalf of the Corporation, in person or by proxy, at any meeting of security holders of or with respect to any action of security holders of any other corporation in which this Corporation may hold securities and otherwise to exercise any and all rights and powers which this Corporation may possess by reason of its ownership of securities in such other corporation.

Section 5.9. Delegation. For any reason that the Board of Directors may deem sufficient, the Board of Directors may, except where otherwise provided by statute, delegate the powers or duties of any officer to any other person, and may authorize any officer to delegate specified duties of such office to any other person. Any such delegation or authorization by the Board shall be effected from time to time by resolution of the Board of Directors.

Article 6 Capital Stock

Section 6.1. Certificates of Stock. The certificates for shares of the capital stock of the Corporation shall be in such form, not inconsistent with that required by law and the charter documents of the Corporation, as shall be approved by the Board of Directors. Every holder of stock represented by certificates shall be entitled to have a certificate signed by or in the name of the Corporation by the President or a Vice President and the Secretary or an Assistant Secretary or the Treasurer or an Assistant Treasurer of the Corporation representing the number of shares (and, if the stock of the Corporation shall be divided into classes or series, certifying the class and series of such shares) owned by such stockholder which are registered in certified form; provided, however, that any of or all the signatures on the certificate may be facsimile. The stock record books and the blank stock certificate books shall be kept by the Secretary or at the office of such transfer agent or transfer agents as the Board of Directors may from time to time determine. In case any officer, transfer agent or registrar who shall have signed or whose facsimile signature or signatures shall have been placed upon any such certificate or certificates shall have ceased to be such officer, transfer agent or registrar before such certificate is issued by the Corporation, such certificate may nevertheless be issued by the Corporation with the same effect as if such person were such officer, transfer agent or registrar at the date of issue. The stock certificates shall be consecutively numbered and shall be entered in the books of the Corporation as they are issued and shall exhibit the holder's name and number of shares.

Section 6.2. Transfer of Shares. The shares of stock of the Corporation shall be transferable only on the books of the Corporation by the holders thereof in person or by their duly authorized attorneys or legal representatives upon surrender and cancellation of certificates for a like number of shares. Upon surrender to the Corporation or a transfer agent of the Corporation of a certificate for shares duly endorsed or accompanied by proper evidence of succession, assignment or

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authority to transfer, it shall be the duty of the Corporation to issue a new certificate to the person entitled thereto, cancel the old certificate and record the transaction upon its books.

Section 6.3. Ownership of Shares. The Corporation shall be entitled to treat the holder of record of any share or shares of capital stock of the Corporation as the holder in fact thereof and, accordingly, shall not be bound to recognize any equitable or other claim to or interest in such share or shares on the part of any other person, whether or not it shall have express or other notice thereof, except as otherwise provided by the laws of the state of Delaware.

Section 6.4. Regulations Regarding Certificates. The Board of Directors shall have the power and authority to make all such rules and regulations as they may deem expedient concerning the issue, transfer and registration or the replacement of certificates for shares of capital stock of the Corporation.

Section 6.5. Lost or Destroyed Certificates. The Board of Directors may determine the conditions upon which the Corporation may issue a new certificate of stock in place of a certificate theretofore issued by it which is alleged to have been lost, stolen or destroyed and may require the owner of such certificate or such owner's legal representative to give bond, with surety sufficient to indemnify the Corporation and each transfer agent and registrar against any and all losses or claims which may arise by reason of the alleged loss, theft or destruction of any such certificate or the issuance of such new certificate in the place of the one so lost, stolen destroyed.

Article 7 Miscellaneous Provisions

Section 7.1. Fiscal Year. The fiscal year of the Corporation shall begin on the first day of January of each year.

Section 7.2. Corporate Seal. The corporate seal shall be circular in form and shall have inscribed thereon the name of the Corporation and the state of it incorporation, which seal shall be in the charge of the Secretary and shall be affixed to certificates of stock, debentures, bonds and other documents, in accordance with the direction of the Board of Directors or a committee thereof, and as may be required by law; however, the Secretary may, if the Secretary deems it expedient, have a facsimile of the corporate seal inscribed on any such certificates of stock, debentures, bonds, contract or other documents. Duplicates of the seal may be kept for use by any Assistant Secretary.

Section 7.3. Notice and Waiver of Notice. Whenever any notice is required to be given by law, the charter documents of the Corporation or under the provisions of these Bylaws, said notice shall be deemed to be sufficient if given (i) by telegraphic, cable or wireless transmission (including by telecopy or facsimile transmission) or (ii) by deposit of the same in a post office box or by delivery to an overnight courier service company in a sealed prepaid wrapper addressed to the person entitled thereto at such person's post office address, as it appears on the records of the Corporation, and such notice shall be deemed to have been given on the day of such transmission or mailing or delivery to courier, as the case may be.

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Whenever notice is required to be given by law, the charter documents of the Corporation or under any of the provisions of these Bylaws, a written waiver thereof, signed by the person entitled to notice, whether before or after the time stated therein, shall be deemed equivalent to notice. Attendance of a person, including without limitation a director, at meeting shall constitute a waiver of notice of such meeting, except when the person attends a meeting for the express purpose of objecting, at the beginning of the meeting, to the transaction of any business because the meeting is not lawfully called or convened. Neither the business to be transacted at, nor the purpose of, any regular or special meeting of the stockholders, directors, or members of a committee of directors need be specified in any written waiver of notice unless so required by the charter documents of the Corporation or these Bylaws.

Section 7.4. Facsimile Signature. In addition to the provisions for the use of facsimile signatures elsewhere specifically authorized in these Bylaws, facsimile signatures of any officer or officers of the Corporation may be used whenever and as authorized by the Board of Directors.

Section 7.5. Reliance upon Books, Reports and Records. A member of the Board of Directors, or a member of any committee designated by the Board of Directors, shall, in the performance of such person's duties, be protected to the fullest extent permitted by law in relying upon the records of the Corporation and upon information, opinion, reports or statements presented to the Corporation.

Section 7.6. Application of Bylaws. In the event that any provisions of these Bylaws is or may be in conflict with any law of the United States, of the state of Delaware, or of any other governmental body or power having jurisdiction over this Corporation, or over the subject matter to which such provision of these Bylaws applies, or may apply, such provision of these Bylaws shall be inoperative to the extent only that the operation thereof unavoidably conflicts with such law, and shall in all other respects be in full force and effect.

Article 8 Indemnification of Officers and Directors

Section 8.1. Indemnification. The Corporation shall, to the maximum extent and in the manner permitted by the General Corporation Law of Delaware, indemnify each of its directors and officers against expenses (including attorneys' fees), judgments, fines, settlements and other amounts actually and reasonably incurred in connection with any proceeding, arising by reason of the fact that such person is or was an agent of the Corporation. For purposes of this Section 6.1, a "director" or "officer" of the Corporation includes any person (i) who is or was a director or officer of the Corporation, (ii) who is or was serving at the request of the Corporation as a director or officer of another corporation, partnership, joint venture, trust or other enterprise, or
(iii) who was a director or officer of a corporation which was a predecessor corporation of the Corporation or of another enterprise at the request of such predecessor corporation.

Section 8.2. Indemnification of Others. The Corporation shall have the power, to the maximum extent and in the manner permitted by the General Corporation Law of Delaware, to indemnify each of its employees and agents (other than directors and officers) against expenses (including attorneys' fees), judgments, fines, settlements and other amounts actually and reasonably

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incurred in connection with any proceeding, arising by reason of the fact that such person is or was an agent of the Corporation. For purposes of this Section 6.2, an "employee" or "agent" of the Corporation (other than a director or officer) includes any person (i) who is or was an employee or agent of the Corporation, (ii) who is or was serving at the request of the Corporation as an employee or agent of another corporation, partnership, joint venture, trust or other enterprise, or (iii) who was an employee or agent of a corporation which was a predecessor corporation of the Corporation or of another enterprise at the request of such predecessor corporation.

Section 8.3. Insurance. The Corporation may purchase and maintain insurance on behalf of any person who is or was a director, officer, employee or agent of the Corporation, or is or was serving at the request of the Corporation as a director, officer, employee or agent of another corporation, partnership, joint venture, trust or other enterprise against any liability asserted against him or her and incurred by him or her in any such capacity, or arising out of his or her status as such, whether or not the Corporation would have the power to indemnify him or her against such liability under the provisions of the General Corporation Law of Delaware.

Article 9 Amendments

Section 9.1. Amendments. The Board of Directors shall have the power to adopt, amend and repeal from time to time Bylaws of the Corporation, subject to the right of the stockholders entitled to vote with respect thereto to amend or repeal such Bylaws as adopted or amended by the Board of Directors

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EXHIBIT 4.2

NATUS MEDICAL INCORPORATED

INFORMATION AND REGISTRATION RIGHTS AGREEMENT

AUGUST 15, 1991


TABLE OF CONTENTS

                                                                            Page
                                                                            ----
 1.  Certain Definitions...................................................    1

 2.  Financial Statements and Reports to Shareholders......................    2

 3.  Additional Information................................................    2

 4.  Inspection............................................................    3

 5.  Use of Information; Termination of Covenants..........................    3

 6.  Demand Registration...................................................    3

 7.  Piggyback Registration................................................    6

 8.  Expenses of Registration..............................................    7

 9.  Registration Procedures...............................................    8

10.  Information Furnished by Holder.......................................    8

11.  Indemnification.......................................................    8

12.  Limitations on Registration Rights Granted to other Securities........   11

13.  Transfer of Rights....................................................   11

14.  Market Stand-Off......................................................   11

15.  Reports Under Securities Exchange Act of 1934.........................   12

16.  Termination of Registration Rights....................................   12

17.  Right of First Refusal................................................   12

18.  Miscellaneous.........................................................   14

     Schedule A   Holders of Series A Preferred Stock

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INFORMATION AND REGISTRATION RIGHTS AGREEMENT

This INFORMATION AND REGISTRATION RIGHTS AGREEMENT (this "Agreement") is
made as of August 15, 1991, by and among Natus Medical Incorporated (the "Company") and the persons listed on the attached Schedule A hereto (collectively, the "Investors").

NOW, THEREFORE, in consideration of the mutual covenants set forth herein, the parties hereby agree as follows:

1. Certain Definitions. As used in this Agreement, the following terms shall have the following respective meanings:

(a) "Commission" shall mean the Securities and Exchange commission or any other federal agency at the time administering the Securities Act of 1933, as amended (the "Securities Act").

(b) "Convertible Securities" shall mean the Series A and Series B Preferred Stock of the Company.

(c) "Form S-3" shall mean Form S-3 under the securities Act or any substantially similar form then in effect.

(d) "Holder" shall mean any holder of outstanding Registrable Securities which have not been sold to the public, but only if such holder is an Investor or an assignee or transferee of Registration rights as permitted by
Section 13.

(e) "Initiating Holders" shall mean Holders who in the aggregate hold at least fifty percent (50%) of the Registrable Securities.

(f) "Material Adverse Event" shall mean an occurrence having a consequence that either (a) is materially adverse to the business, properties, prospects or financial condition of the Company or (b) is reasonably foreseeable or has a reasonable likelihood of occurring, and if it were to occur might materially adversely affect the business, properties, prospects or financial condition of the Company.

(g) The terms "Register" "Registered" and "Registration" refer to a registration effected by preparing and filing a registration statement in compliance with the Securities Act ("Registration Statement"), and the declaration or ordering of the effectiveness of such Registration Statement.

(h) "Registrable Securities" shall mean all Common Stock not previously sold to the public issued or issuable upon conversion or exercise of any of the Company's Convertible Securities purchased by or issued to the Investors, including Common Stock issued pursuant to stock

splits, stock dividends and similar distributions, and any securities of the Company granted registration rights pursuant to Section 12 of this Agreement.

(i) "Registration Expenses" shall mean all expenses incurred by the Company in complying with Section 6 or 7 of this Agreement, including, without limitation, all federal and state registration, qualification and filing fees, printing expenses, fees and disbursements of counsel for the Company and one special counsel for Holders (if different from the Company), blue sky fees and expenses, and the expense of any special audits incident to or required by any such registration. Registration Expenses shall not include any fees and disbursements of counsel for the Holders, other than the one special counsel referenced above.

(j) "Securities Act" shall mean the Securities Act 1933, as amended, or any similar federal statute, and the rules and regulations of the Commission thereunder, all as the same shall be in effect at the time.

(k) "Selling Expenses" shall mean underwriting discounts and selling commissions applicable to the sale of Registrable Securities pursuant to this Agreement.

2. Financial Statements and Reports to Shareholders. The Company shall deliver to the Investors as soon as practicable after the end of each fiscal year of the Company, and in any event within 150 days thereafter, an audited consolidated balance sheet of the Company as of the end of such year and audited consolidated statements of income, shareholders' equity and cash flows for such year, which year-end financial reports shall be in reasonable detail and shall be accompanied by the opinion of independent public accountants of recognized national standing selected by the Company.

As soon as practicable after the end of the first, second and third quarterly accounting periods in each fiscal year of the Company and in any event within 45 days thereafter, the Company shall deliver to the Investors a consolidated balance sheet of the Company and its subsidiaries, if any, as of the end of each such quarterly period, and consolidated statements of income and cash flows of the Company and its subsidiaries for such period and for the current fiscal year to date, prepared in accordance with generally accepted accounting principles, all in reasonable detail and signed, subject to changes resulting from year-end audit adjustments, by the principal financial or accounting officer of the Company.

3. Additional Information. As long as an Investor (together with any affiliate thereof) or its transferee holds not less than 100,000 shares of the Company's Common Stock (assuming conversion or exchange of all convertible or exchangeable securities, including options and warrants of the Company then outstanding) the Company will deliver to such Investor:

(a) As soon as practicable after the end of each month, and in any event within 30 days thereafter, consolidated balance sheets of the Company and its subsidiaries, if any, as the end of such month, and consolidated statements of income and cash flow for such month and for the current fiscal year to date.

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(b) As soon as practicable following submission to and approval by the Board of Directors of the Company, but in no event later than November 30 of each year, an operating budget and plan (the "Plan") respecting the next fiscal year, together with any update of the Plan as such update is prepared.

4. Inspection. The Company shall permit each Investor who (together with any affiliate thereof) holds not less than 100,000 shares of the Company's Common Stock (assuming conversion or exchange of all convertible or exchangeable securities, including options and warrants of the Company then outstanding), at such Investor's expense, to visit and inspect the Company's properties, to examine its books of account and records and to discuss the Company's affairs, finances and accounts with its officers, all at such reasonable times as may be requested by each such Investor; provided, however, that the Company shall not be obligated pursuant to this Section 4 to provide any information which it reasonably considers to be a trade secret or similar confidential information. Subject to Section 5, the rights of an Investor under this Section 4 may not be assigned as part of such Investor's sale of any of the Registrable Securities or Convertible Securities except with the consent of the Company, which consent shall not be unreasonably withheld.

5. Use of Information; Termination of Covenants. No Investor shall enter into any transaction for the purchase or sale of any securities of the Company with any other person unless such Investor has made any material information actually obtained by such Investor pursuant to Section 2, 3 or 4 available to such other person. The covenants of the Company set forth in Section 2, 3 and 4 shall be terminated and be of no further force or effect upon the earlier of (a) the date when a Registration Statement filed by the Company under the Securities Act, in connection with the first public offering of its securities (other than either a public offering limited solely to employees of the Company or an offering pursuant to Rule 145 under the Securities Act) becomes effective and
(b) the date the Company registers any securities under the Securities Exchange Act of 1934 (the 111934 Act"), and such covenants shall terminate as to any Investor as of the date such Investor no longer holds any shares of the capital stock of the Company.

6. Demand Registration.

(a) Request for Registration on Form Other Than Form S-3. Subject to the terms of this Agreement, in the event that the Company shall receive from Initiating Holders at any time after the earlier of (a) the date four years from the date of this Agreement and (b) the Company's initial public offering of shares of Common Stock under a Registration Statement, a written request that the Company effect any firmly-underwritten Registration with respect to all or a part of the Registrable Securities on a form other than Form S-3 for an offering of at least 20% of the then outstanding Registrable Securities (or any lesser percent if the reasonably anticipated aggregate offering price to the public, net of underwriting discounts and commissions, would exceed $7,500,000), the Company shall (i) promptly give written notice of the proposed Registration to all other Holders and shall (ii) as soon as practicable, use its best efforts to effect Registration of the Registrable Securities of any Holder joining in such request as are specified in a written request delivered to the Company within 20 days after written notice from the Company. The Company

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shall not be obligated to take any action to effect any such registration pursuant to this Section 6(a) within six months of the effective date of a Registration initiated by the Company or (ii) after the Company has effected two such Registrations pursuant to this Section 6(a) and such Registrations have been declared effective.

(b) Right of Deferral of Registration. If the Company shall furnish to all such Holders who joined in the request a certificate signed by the President of the Company stating that, in the good faith judgment of the Board of Directors of the Company, it would be seriously detrimental to the Company for any Registration to be effected as requested under Section 6(a), the Company shall have the right, exercisable only once with respect to each such request, to defer the filing of a Registration Statement with respect to such offering for a period of not more than 120 days from the request of the Initiating Holders.

(c) Request for Registration on Form S-3. Subject to the terms of this Agreement, in the event that the company receives from Holders who in the aggregate hold at least twenty percent(20%) of the then outstanding Registrable securities, or any lesser percent if the reasonably anticipated aggregate offering price to the public, net of underwriting discounts and commissions, would exceed $1,000,000, a written request that the Company effect any Registration on Form S-3 (or any successor form to Form S-3 regardless of its designation) at a time when the Company is eligible to register securities on Form S-3 (or any successor form to Form S-3 regardless of its designation), but not within six (6) months of the effective date of a Registration, for an offering of Registrable Securities, the Company will promptly give written, notice of the proposed Registration to all the Holders and will as soon as practicable use its best efforts to effect Registration of the Registrable Securities specified in such request, together with all or such portion of the Registrable Securities of any Holder joining in such request as are specified in a written request delivered to the Company within 20 days after written notice from the Company of the proposed Registration. There shall be no limit. to the number of occasions on which the Company shall be obligated to effect Registration under this Section 6(c), provided, however, the Company shall not be obligated to take any action to effect any such Registration more than once in any 12 month period.

(d) Registration of Other Securities in Demand Registration. Any Registration Statement filed pursuant to the request of the Initiating Holders under this Section 6 may, subject to the provisions of Section 6(e), include securities of the Company other than Registrable securities.

(e) Underwriting in Demand Registration.

(i) Notice of Underwriting. If the Initiating Holders intend to distribute the Registrable Securities covered by their request by means of an underwriting, they shall so advise the Company as a part of their request made pursuant to this Section 6, and the Company shall include such information in the written notice referred to in Section 6(a) or 6(c). The right of any Holder to Registration pursuant to Section 6 shall be conditioned upon such Holder's agreement to participate in such underwriting and the inclusion of such Holder's Registrable Securities in the underwriting.

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(ii) Inclusion of Other Holders in Demand Registration. If the Company, officers or directors of the Company holding Common Stock other than Registrable Securities or holders of securities other than Registrable Securities, request inclusion in such Registration, the Initiating Holders, to the extent they deem advisable in their sole discretion and consistent with the goals of such Registration, shall, on behalf of all Holders, offer to any or all of the Company, such officers or directors and such holders of securities other than Registrable Securities that such securities other than Registrable Securities be included in the underwriting and may condition such offer on the acceptance by such persons of the terms of this Section 6. In the *vent, however, that the number of shares so included exceeds the number of shares of Registrable Securities included by all Holders, such Registration shall be treated as governed by Section 7 hereof rather than Section 6, and it shall not count as a Registration for purposes of Section 6(a) hereof.

(iii) Selection of Underwriter in Demand Registration. The Company shall (together with all Holders proposing to distribute their securities through such underwriting) enter into an underwriting agreement with the representative ("Underwriter's Representative") of the underwriter or underwriters of national reputation selected for such underwriting by the Holders of a majority of the Registrable Securities being registered by the Initiating Holders and agreed to by the Company.

(iv) Marketing Limitation in Demand Registration. In the event the Underwriter's Representative advises the Initiating Holders in writing that market factors (including, without limitation, the aggregate number of shares of Common Stock requested to be Registered, the general condition of the market, and the status of the persons proposing to sell securities pursuant to the Registration) require a limitation of the number of shares to be underwritten, then (i) first the Common Stock (other than Registrable Securities) held by officers or directors of the Company, (ii) next the securities other than Registrable Securities, and (iii) last the securities requested to be registered by the Company, shall be excluded from such Registration to the extent required by such limitation. If a limitation of the number of shares is still required, the Initiating Holders shall so advise all Holders and the number of shares of Registrable Securities that may be included in the Registration and underwriting shall be allocated among all Holders in proportion, as nearly as practicable, to the respective amounts of Registrable Securities entitled to inclusion in such Registration held by such Holders at the time of filing the Registration Statement. No Registrable Securities or other securities excluded from the underwriting by reason of this Section 6(e)(iv) shall be included in such Registration Statement.

(v) Right of Withdrawal in Demand Registration. If any Holder of Registrable Securities, or a holder of other securities entitled (upon request) to be included in such Registration, disapproves of the terms of the underwriting, such person may elect to withdraw therefrom by written notice to the Company, the underwriter and the Initiating Holders delivered at least seven days prior to the effective date of the Registration Statement. The securities so withdrawn shall also be withdrawn from the Registration Statement.

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(f) Blue Sky in Demand Registration. In the event of any Registration pursuant to this Section 6, the Company will exercise its best efforts to Register and qualify the securities covered by the Registration Statement under such other securities or Blue Sky laws of such jurisdictions as shall be reasonably requested by the Holders; provided, however, that (i) the Company shall not be required to qualify to do business or to file a general consent to service of process in any such states or jurisdictions, and (ii) notwithstanding anything in this Agreement to the contrary, in the event any jurisdiction in which the securities shall be qualified imposes a non-waivable requirement that expenses incurred in connection with the qualification of the securities be borne by selling shareholders, such expenses shall be payable pro rata by selling shareholders.

7. Piggyback Registration.

(a) Notice of Piggyback Registration and Inclusion of Registrable
Securities. Subject to the terms of this Agreement in the event the Company decides to Register any of its Common Stock (either for its own account or the account of a security holder or holders exercising their respective demand registration rights) on a form that would be suitable for a registration involving solely Registrable Securities, the Company will: (i) promptly give each Holder written notice thereof (which shall include a list of the jurisdictions in which the Company intends to attempt to qualify such securities under the applicable Blue Sky or other state securities laws), and (ii) include in such Registration (and any related qualification under Blue Sky laws or other compliance),and in any underwriting involved therein, all the Registrable securities specified in a written request delivered to the Company by any Holder within 20 days after written notice from the Company.

(b) Underwriting in Piggyback Registration.

(i) Notice of Underwriting in Piggyback Registration. If the Registration of which the Company gives notice is for a Registered public offering involving an underwriting, the Company shall so advise the Holders as a part of the written notice given pursuant to Section 7(a). In such event the right of any Holder to Registration shall be conditioned upon such underwriting and the inclusion of such Holder's Registrable Securities in such underwriting to the extent provided in this Section 7. All Holders proposing to distribute their securities through such underwriting shall (together with the Company and the other holders distributing their securities through such underwriting) enter into an underwriting agreement with the Underwriter's Representative for such offering. The Holders shall have no right to participate in the selection of the underwriters for an offering pursuant to this Section 7.

(ii) Marketing Limitation in Piggyback Registration. In the event the Underwriter's Representative advises the Holders seeking registration of Registrable Securities pursuant to Section 7 in writing that market factors (including, without limitation, the aggregate number of shares of Common Stock requested to be Registered, the general condition of the market, and the status of the persons proposing to sell securities pursuant to the Registration) require a limitation of the number of shares to be underwritten, the Underwriter's Representative (subject to the allocation priority set forth in
Section 7(b)(iii)) may:

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(A) in the case of the Company's initial Registered public offering, exclude some or all Registrable Securities from such registration and underwriting; and

(B) in the case of the Registered public offerings subsequent to the initial public offering, limit the number of shares of Registrable Securities to be included in such Registration and underwriting to not less than thirty percent (30%) of the securities included in such Registration (based on aggregate market values).

(iii) Allocation of Shares in Piggyback Registration. In the event that the Underwriter's Representative limits the number of shares to be included in a Registration pursuant to Section 7(b)(ii), the number of shares to be included in such Registration shall be allocated (subject to Section 7(b)(ii)) in the following manner: The shares (other than Registrable Securities) held by officers or directors of the Company shall be excluded from such registration and underwriting to the extent required by such limitation. If a limitation of the number of shares is still required after such exclusion, the number of shares that may be included in the Registration and underwriting by selling shareholders shall be allocated among all other Holders thereof and other holders of securities other than Registrable Securities requesting and legally entitled to include shares in such Registration, in proportion, as nearly as practicable, to the respective amounts of securities (including Registrable Securities) which such Holders and such other holders would otherwise be entitled to include in such Registration. No Registrable Securities or other securities excluded from the underwriting by reason of this Section 7(b)(iii) shall be included in the Registration Statement.

(iv) Withdrawal in Piggyback Registration. If any Holder disapproves of the terms of any such underwriting, he may elect to withdraw therefrom by written notice to the Company and the underwriter delivered at least seven days prior to the effective date of the Registration Statement. Any Registrable Securities or other securities excluded or withdrawn from such underwriting shall be withdrawn from such Registration.

(c) Blue Sky in Piggyback Registration. In the event of any Registration of Registrable Securities pursuant to Section 7, the Company will exercise its best efforts to Register and qualify the securities covered by the Registration Statement under such other securities or Blue Sky laws of such jurisdictions as shall be reasonably appropriate for the distribution of such securities; provided, however, that (i) the Company shall not be required to qualify to do business or to file a general consent to service of process in any such states or jurisdictions, and (ii) notwithstanding anything in this Agreement to the contrary, in the event any jurisdiction in which the securities shall be qualified imposes a non-waivable requirement that expenses incurred in connection with the qualification of the securities be borne by selling shareholders, such expenses shall be payable pro rata by selling shareholders.

8. Expenses of Registration. All Registration Expenses incurred in connection with (i) two Registrations pursuant to Section 6(a); (ii) all Registrations on Form S-3 pursuant to Section 6(c); and (iii) all Registrations pursuant to Section 7, shall be borne by the Company. All Registration Expenses incurred in connection with any other Registration, qualification or compliance shall be apportioned among the Holders and other holders of the securities so Registered

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on the basis of the number of shares so Registered. Notwithstanding the above, the Company shall not be required to pay for the expenses of any Registration proceeding begun pursuant to Section 6 if the Registration request is subsequently withdrawn at the request of the Holders of a majority of the Registrable Securities to be Registered (which Holders shall bear such expenses), unless the Holders of a majority of the Registrable Securities agree to forfeit their right to one demand Registration pursuant to Section 6; provided further, however, that if at the time of such withdrawal, the Holders have learned of a Material Adverse Event with respect to the condition, business or prospects of the Company either: (i) not known to the Holders at the time of their request, or (ii) not made known to the Holders within 15 days after their request, then the Holders shall not be required to pay any Registration Expenses and shall retain their rights pursuant to Section 6. All Selling Expenses shall be borne by the holders of the securities Registered pro rata on the basis of the number of shares Registered.

9. Registration Procedures. The Company will keep each Holder whose Registrable Securities are included in any Registration pursuant to this Agreement advised as to the initiation and completion of such Registration. At its expense the Company will: (a) use its best efforts to keep such Registration effective for a period of 120 days or until the Holder or Holders have completed the distribution described in the Registration statement relating thereto, whichever first occurs; and (b) furnish such number of prospectuses (including preliminary prospectuses) and other documents as a Holder from time to time may reasonably request.

10. Information Furnished by Holder. It shall be a condition precedent of the Company's obligations under this Agreement that each Holder of Registrable Securities included in any Registration furnish to the Company such information regarding such Holder and the distribution proposed by such Holder or Holders as the Company may reasonably request in connection with such Registration.

11. Indemnification.

(a) Company's Indemnification of Holders. To the extent permitted by law, the Company will indemnify each Holder, each of its officers, directors and constituent partners, legal counsel for the Holders, and each person controlling such Holder, with respect to which Registration, qualification or compliance of Registrable Securities has been effected pursuant to this Agreement, and each underwriter, if any, and each person who controls any underwriter against all claims, losses, damages or liabilities (or actions in respect thereof) to the extent such claims, losses, damages or liabilities arise out of or are based upon any untrue statement (or alleged untrue statement) of a material fact contained in any prospectus or other document (including any related Registration Statement) incident to any such Registration, qualification or compliance, or are based on any omission (or alleged omission) to state therein a material fact required to be stated therein or necessary to make the statements therein not misleading, or any violation (or alleged violation) by the Company of any rule or regulation promulgated under the Securities Act, the 1934 Act, or any state securities law applicable to the Company and relating to action or inaction required of the Company in connection with any such Registration, qualification or compliance; and the Company

-8-

will reimburse each such Holder, each such underwriter and each person who controls any such Holder or underwriter, for any legal and any other expenses reasonably incurred (and as incurred) in connection with investigating or defending any such claim, loss, damage, liability or action; provided, however, that the indemnity contained in this Section 11(a) shall not apply to amounts paid in settlement of any such claim, loss, damage, liability or action if settlement is effected without the consent of the Company (which consent shall not unreasonably be withhold); provided further, however, that if the Company and the Holder disagree as to the reasonableness of the settlement terms, they shall mutually agree upon an independent counsel to review the matter and resolve the dispute, with the cost of such counsel to be split between the company and the Holder; and provided, further, that the Company will not be liable in any such case to the extent that any such claim, loss, damage, liability or expense arises out of or is based upon any untrue statement or omission based upon written information furnished to the Company by such Holder, underwriter ,or controlling person and stated to be for use in connection with the offering of securities of the Company.

(b) Holder's Indemnification of Company. To the extent permitted by law, each Holder will, if Registrable Securities held by such Holder are included in the securities as to which such Registration, qualification or compliance is being effected pursuant to this Agreement, indemnify the Company, each of its directors and officers, each legal counsel and independent accountant of the Company, each underwriter, if any, of the Company's securities covered by such a Registration Statement, each person who controls the Company or such underwriter within the meaning of the Securities Act, and each other such Holder, each of its officers, directors and constituent partners and each person controlling such other Holder, against all claims, losses, damages and liabilities(or action in respect thereof) arising out of or based upon any untrue statement (or alleged untrue statement) of a material fact contained in any such Registration Statement, prospectus, offering circular or other document, or any omission (or alleged omission)to state therein a material fact required to be stated therein or necessary to make the statements therein not misleading, or any violation by such Holder of any rule or regulation promulgated under the Securities Act applicable to such Holder and relating to action or inaction required of such Holder in connection with any such Registration, qualification or compliance; and will reimburse the Company, such Holders, such directors, officers, partners, persons, law and accounting firms, underwriters or control persons for any legal and any other expenses reasonably incurred in connection with investigating or defending any such claim, loss, damage, liability or action, in each case to the extent, and only to the extent, that such untrue statement (or alleged untrue statement) or omission (or alleged omission) is made in such Registration Statement, prospectus, offering circular or other document in reliance upon and in conformity with written information furnished to the company by such Holder and stated to be specifically for use in connection with the offering of securities of the Company; pro-vided, however, that each Holder's liability under this Section 11(b) shall not exceed the gross proceeds received by such Holder from the offering of securities made in connection with such Registration.

(c) Indemnification Procedure. Promptly after receipt by an indemnified party under this Section 11 of notice of the commencement of any action, such indemnified party will, if a claim in respect thereof is to be made against an indemnifying party under this Section 11, notify the

-9-

indemnifying party in writing of the commencement thereof and generally summarize such action. The indemnifying party shall have the right to participate in and to assume the defense of such claim; provided, however, that the indemnifying party shall be entitled to select counsel for the defense of such claim with the approval of any parties entitled to indemnification, which approval shall not be unreasonably withheld; provided further, however, that if either party reasonably deter-mines that there may be a conflict between the position of the Company and the Holders in conducting the defense of such action, suit or proceeding by reason of recognized claims for indemnity under this Section 11, then counsel for such party shall be entitled to conduct the defense to the extent reasonably determined by such counsel to be necessary to protect the interest of such party. The failure to notify an indemnifying party promptly of the commencement of any such action, if prejudicial to the ability of the indemnifying party to defend such action, shall relieve such indemnifying party, to the extent so prejudiced, of any liability to the indemnified party under this Section 11, but the omission so to notify the indemnifying party will not relieve such party of any liability that such party may have to any indemnified party otherwise other than under this Section 11.

(d) Contribution. If the indemnification provided for in this Section 11 is for any reason held to be unavailable, or insufficient to hold harmless an indemnified party under this Section 11 with respect to any losses, claims, damages or liabilities referred to therein, then each indemnifying party shall contribute to the amount paid or payable by such indemnified party as a result of such losses, claims, damages or liabilities in such proportion as is appropriate to reflect the relative fault of the indemnifying party on the one hand, and of the indemnified party on the other, in connection with the statements or omissions that resulted in such losses, claims, damages or liabilities as well as any other relevant equitable considerations; provided, however, that each Holder's liability under this Section 11(d) shall not exceed such Holder's gross proceeds from the offering of securities made in connection with a Registration pursuant to this Agreement. The relative fault of the indemnifying party and of the indemnified party shall be determined by reference to, among other things, whether the untrue or alleged untrue statement of a material fact or the omission or alleged omission to state a material fact relates to information supplied by the indemnifying party or by the indemnified party and the parties' relative intent, knowledge, access to information and opportunity to correct or prevent such statement or omission. For purposes of this Section 11(d) each person, if any, who controls, within the meaning of the Securities Act, any indemnified party shall have the same rights to contribution as such indemnified party, and each person, if any, who controls the Company within the meaning of the Securities Act, each officer of the Company who shall have signed the Registration Statement and each director of the company shall have the same rights to contribution as the company. Any party entitled to contribution, promptly after receipt of notice of commencement of any action, suit or proceeding against such party in respect of which a claim for contribution may be made against another party or parties under this Section
11(d), will notify such party or parties from whom contribution may be sought, but the omission so to notify such party or parties from whom contribution may be sought shall not relieve the party or parties from whom contribution may be sought from any other obligation it or they may have hereunder or otherwise than under this Section 11(d). Notwithstanding the fore-going, to the extent that the provisions on indemnification and contribution contained in the underwriting

-10-

agreement entered into in connection with the underwritten public offering are in conflict with the foregoing provisions, the provisions in the underwriting agreement shall be controlling.

12. Limitations on Registration Rights Granted to other Securities. From and after the date of this Agreement, the Company shall not enter into any agreement with any holder or prospective holder of any securities of the Company providing for the granting to such holder of any information or Registration rights, except that, with the consent of the Holders of a majority of the aggregate of the Registrable Securities then outstanding, additional holders may be added as parties to this Agreement with regard to any or all securities of the Company held by them. Any such additional parties shall execute a counterpart of this Agreement and, upon execution by such additional parties and by the Company, shall be considered an Investor for all purposes of this Agreement. The additional parties and the additional Registrable Securities shall be identified in an amendment to Schedule A hereto.

13. Transfer of Rights. The rights to information under Sections 2, 3 and 4 and the right to cause the Company to Register securities granted by the Company to the Investors under this Agreement may be assigned by any Holder to a transferee or assignee of any Convertible Securities or Registrable Securities not sold to the public acquiring at least 50,000 shares of such Holder's Registrable Securities (equitably adjusted for any stock splits, subdivisions, stock dividends, changes, combinations or the like); provided, however, that (i) the Company must receive written notice prior to the time of said transfer, stating the name and address of said transferee or assignee and identifying the securities with respect to which such information and Registration rights are being assigned, and (ii) the transferee or assignee of such rights must not be a person deemed by the Board of Directors of the Company, in its best judgment, to be a competitor or potential competitor of the Company. Notwithstanding the limitation set forth in the foregoing sentence respecting the minimum number of shares that must be transferred, any Holder that is a partnership may transfer such Holder's Registration rights to such Holder's constituent partners without restriction as to the number or percentage of shares acquired by any such constituent partner.

14. Market Stand-Off. Each Holder hereby agrees that, if so requested by the Company and the Underwriter's Representative (if any), such Holder shall not sell or otherwise transfer any Registrable Securities or other securities of the Company held by it for a period of up to 180 days or such shorter duration as may be agreed upon by the Company and the Underwriters following the effective date of a Registration Statement of the Company filed under the Securities Act; provided, however, that;

(a) such agreement shall be applicable only to the first such registration statement of the Company which covers common stock (or other securities) to be sold on its behalf to the public in an underwritten offering; and

(b) all officers and directors of the Company and all other persons with registration rights (whether or not pursuant to this Agreement) enter into similar agreements.

-11-

15. Reports Under Securities Exchange Act of 1934. With a view to making available to the Holders the benefits of Rule 144 and any other rule or regulation of the Commission that may at any time permit a Holder to sell securities of the Company to the public without registration or pursuant to a registration on Form S-3, the Company agrees to:

(i) make and keep public information available, as those terms are defined in Rule 144, at all times after ninety (90) days after the effective date of the first registration statement filed by the Company for the offering of its securities to the general public;

(ii) take such action, including the voluntary registration of its Common Stock under Section 12 of the 1934 Act, as is necessary to enable the Holders to utilize Form S-3 for the sale of their Registrable Securities, such action to be taken, as required under the 1934 Act, no later than 120 days after the end of the fiscal year in which the first registration statement filed by the Company for the offering of its securities to the general public is declared effective;

(iii) file with the Commission in a timely manner all reports and other documents required of the Company under the Securities Act and the 1934 Act; and

(iv) furnish to any Holder, so long as such Holder owns any Registrable Securities, forthwith upon request (i) a written statement by the Company that it has complied with the reporting requirements of Rule 144 (at any time after ninety (90) days after the effective date of the first registration statement filed by the Company), the Securities Act and the 1934 Act (at any time after it has become subject to such reporting requirements), or that it qualifies as a registrant whose securities may be resold pursuant to Form S-3 (at any time after it so qualifies), (ii) a copy of the most recent annual or quarterly report of the Company and such other reports and documents so filed by the Company with the Commission, and (iii) such other information as may be reasonably requested in availing any Holder of any rule or regulation of the Commission which permits the selling of any such securities without registration or pursuant to such plan.

16. Termination of Registration Rights. The Registration rights granted pursuant to this Agreement shall terminate as to an Investor (i) at such time after the Company's initial Registered public offering as all Registrable Securities held by such Investor can be sold within a given three-month period without compliance with the registration requirements of the Securities Act pursuant to Rule 144, or (ii) five years after the effective date of the Company's initial Registered public offering.

17. Right of First Refusal. The Company hereby grants to each Investor the right of first refusal to purchase, pro rata, a portion of any New Securities (as defined in this Section 17) that the Company may, from time to time, propose to sell and issue. Such Investor's pro rata share of any offering of New Securities, for purposes of this right of first refusal, is the ratio of the aggregate number of shares of Common Stock into which the shares of Convertible Securities or any other securities of the Company held by such Investor are convertible or have been converted, to the total number of outstanding shares of Common Stock of the Company (assuming, for purposes of such

-12-

calculation, complete conversion of all outstanding convertible securities). This right of first refusal shall be subject to the following provisions:

(a) "New Securities" shall mean any Common Stock or Preferred Stock of the Company, whether now authorized or not, and rights, options, or warrants to purchase said Common-Stock or Preferred Stock, and securities of any type whatsoever that are, or may become, convertible into said Common Stock or Preferred Stock; provided, however, that "New Securities" does not include(i) securities issuable upon conversion of or with respect to the Series A or Series B Preferred Stock; (ii) securities offered to the public pursuant to a registration statement filed under the Securities Act pursuant to approval of the Board of Directors of the Company; (iii) securities issued pursuant to the acquisition of another corporation or entity by the Company by merger, purchase of substantially all of the assets or other reorganization whereby the Company owns not less than fifty-one percent (51%) of the voting power of such resulting corporation or entity; (iv) 708,537 shares of the company's Common Stock (or related options) issued to employees, officers or consultants of the Company pursuant to any employee stock offering, plan or arrangement approved by the Board of Directors; (v) shares of the Company's Common Stock or Preferred Stock issued in connection with any stock split, stock dividend or recapitalization by the Company; or (vi) securities issued pursuant to and in consideration of the acquisition of a license or other rights, assets or technology from third parties or by third parties from the Company (provided that such issuances are primarily for other than equity financing purposes), or in connection with any lease financings relating to the Company's assets, on the condition that such issuance and acquisition is approved by the incumbent Board of Directors.

(b) In the event that the Company proposes to undertake an issuance of New Securities, it shall give each Investor that holds a right of first refusal under Section 17 hereof written notice of its intention, describing the type of New Securities, the price and the general terms upon which the Company proposes to issue the same. Each Investor shall have twenty (20) days from the effective date of any such notice to agree to purchase his pro rata share of such New Securities for the price and upon the general terms specified in the notice by delivering written notice to the Company and stating therein the quantity of New Securities to be purchased. Each Investor shall have a right of over allotment such that if any Investor fails to exercise his right hereunder to purchase his pro rata portion of New Securities, the Company shall so notify the other Investors and the other Investors may purchase the nonpurchasing Investor's portion on a pro rata basis, by delivering a written notice to the Company within five (5) days from the effective date of such notice.

(c) In the event that Investors fail to exercise in full the right of first refusal within said twenty (20) day period, the Company shall have ninety
(90) days thereafter to sell the New Securities with respect to which the Investors' rights were not exercised, at a price and upon general terms no more favorable to the purchasers thereof than specified in the Company's notice . In the event the Company has not sold the New Securities within such ninety (90) day period, the Company shall not thereafter issue or sell any New Securities without first offering such securities to the Investors in the manner provided above.

-13-

(d) The right of first refusal granted under this Agreement shall expire upon the closing of the first firmly underwritten public offering of Common Stock of the Company pursuant to a Registration Statement filed with, and declared effective by, the commission under the Securities Act, on terms and conditions approved by the Board of Directors of the Company.

(e) This right of first refusal is not assignable without the written consent of the Company (which consent will not be unreasonably withheld), provided that such written consent shall not be required in connection with a transfer of shares of Convertible Securities or Common Stock issued on conversion thereof to an affiliate or a partner of the Investor or a transfer not involving a change in beneficial ownership.

18. Miscellaneous.

(a) Governing Law. This Agreement shall be governed by and construed in accordance with the laws of the State of California applicable to contracts entered into and wholly to be performed within the State of California residents.

(b) Counterparts. This Agreement may be executed in two or more counterparts, each of which shall be deemed an original, but all of which together shall constitute one and the same instrument.

(c) Headings. The headings of the Sections of this Agreement are for convenience and shall not by themselves determine the interpretation of this Agreement.

(d) Notices. Any notice required or permitted hereunder shall be given in writing and shall be conclusively deemed effectively given upon personal delivery, or five days after deposit in the United States mail, by registered or certified mail (or by airmail, if notice shall be sent outside the United States), postage prepaid, addressed (i) if to the Company, as set forth below the Company's name on the signature page of this Agreement, and (ii) if to an Investor, at such Investor's address as set forth on Schedule A, or at such other address as the Company or such Investor may designate by ten (10) days' advance written notice to the Investors or the Company, respectively. Any notice sent outside the United States shall also be telexed or telecopied.

(e) Amendment of Agreement. Except as otherwise provided in Section 12, any provision of this Agreement may be amended and the observance thereof may be waived, only by a written instrument signed by the Company and by persons holding at least a majority of the Registrable Securities as defined in Section 1 of this Agreement. Any amendment or waiver effected in accordance with this paragraph shall be binding upon each holder of any Registrable Securities then outstanding, each subsequent holder of all such Registrable Securities and the Company.

(f) Entire Agreement. This Agreement constitutes the full and entire understanding and agreement between the parties with regard to the subject matter hereof, and no party shall be liable or bound to any other party in any manner by any warranties, representations or covenants relating to such subject matter, except as specifically set forth herein.

-14-

IN WITNESS WHEREOF, the parties hereto have executed this Agreement as of the day and year first above written.

The Company:                        NATUS MEDICAL INCORPORATED
                                    a California corporation

                                    By: /s/ Will Moore
                                       --------------------------------

                                    Title: President and CEO
                                          -----------------------------

The Investors:                      TRINITY VENTURES II, L.P.,
                                    a California Limited Partnership

                                    By: Trinity TVL Partners, L.P.,
                                        Its General Partner

                                    By: /s/ David Nierenberg
                                       --------------------------------

                                    Title: General Partner
                                          -----------------------------

                                    TRINITY VENTURES III, L.P.
                                    a California Limited Partnership

                                    By: Trinity TVL Partners, L.P.
                                        Its General Partner

                                    By: /s/ David Nierenberg
                                       --------------------------------

                                    Title: General Partner
                                          -----------------------------

                                    TRINITY SIDE-BY-SIDE I, L.P.
                                    a California Limited Partnership

                                    By: Trinity TVL Partners, L.P.,
                                        Its General Partner

                                    By: /s/ David Nierenberg
                                       --------------------------------

                                    Title: General Partner
                                          -----------------------------

                                    DELPHI BIOVENTURES, L.P.

                                    By: Delphi Management Partners
                                        General Partner

                                    By: /s/ James J. Bochnowski
                                        ________________________________

                                    Title: General Partner
                                          _____________________________

                                    DELPHI BIOINVESTMENTS, L.P.

                                    By: Delphi Management Partners
                                        General Partner

                                    By: /s/ James J. Bochnowski
                                       ________________________________

                                    Title: General Partner
                                          _____________________________


                                     /s/ Henry Hamilton
                                    ___________________________________
                                    Henry H. Hamilton, MD

                                     /s/ Larry Haimovitch
                                    ___________________________________
                                    Larry Haimovitch

                                     /s/ Robin Wolaner
                                    ___________________________________
                                    Robin Wolaner

                                     /s/ William New, Jr., MD
                                    ___________________________________
                                    William New, Jr., MD

                                     /s/ John Porter
                                    ___________________________________
                                    John Porter

                                     /s/ Maurizio Liverani
                                    ___________________________________
                                    Maurizio Liverani

                                     /s/ Jeffrey Harrison
                                    ___________________________________
                                    Jeffrey Harrison

                                    William M. and Patricia A. Moore, Trustees
                                    under the Moore Family Trust Agreement
                                    April 8, 1988

                                    By: /s/ William M. Moore
                                       _______________________________________

                                    Title:____________________________________

                                    The Prinn Family Trust U.T.D.

                                    11/11/79


                                    By: /s/ Brian Prinn
                                        _______________________________________

                                    Title:   Trustee
                                           ____________________________________

                                    WS INVESTMENTS 91C


                                    By: /s/ Robert P. Latta
                                        _______________________________________

                                    Title:   V.P.
                                           ____________________________________

                                     /s/ Tracie L. Austin
                                    __________________________________________
                                    Tracie L.  Austin

                                     /s/ Mary Sinclair
                                    __________________________________________
                                    Mary Sinclair

                                     /s/ John Turner
                                    __________________________________________
                                    John Turner

                                    COMMUNICORE

                                    By: /s/ Illegible
                                        ______________________________________

                                    Title:   President
                                           ___________________________________

                                     /s/ Ken Traverso
                                    __________________________________________
                                    Ken Traverso

                                     /s/ Tamma Norwood
                                    __________________________________________
                                    Tamma Norwood

                                    /s/ Neal Higgs
                                    __________________________________________
                                    Neal Higgs

                                    /s/ Cathy Cates
                                    __________________________________________
                                    Cathy Cates

                                    /s/ Scott Kadash
                                    __________________________________________
                                    Scott Kadash

                                    /s/ Kathryn Gelbman
                                    __________________________________________
                                    Kathryn Gelbman

                                    /s/ Stefanie Yanai
                                    __________________________________________
                                    Stefanie Yanai

                                    /s/ Jennifer Brown
                                    __________________________________________
                                    Jennifer Brown

                                    /s/ Rebecca Maa
                                    __________________________________________
                                    Rebecca Maa

                                    /s/ Patricia Moore
                                    __________________________________________
                                    Patricia Moore

                                    __________________________________________

Neal Higgs


Cathy Cates


Scott Kadash


Kathryn Gelbman


Stephanie Yanai


Jennifer Brown


Rebecca Maa


Patricia Moore

/s/ Robert P. Latta
__________________________________________
Robert P. Latta

/s/ Clarence Blom
__________________________________________
Clarence Blom


AMENDMENT NO. 1 TO

INFORMATION AND REGISTRATION RIGHTS AGREEMENT

This Amendment No. 1 to the Information and Registration Rights Agreement made as of August 15, 1991 by and among Natus Medical Incorporated
(the "Company") and the investors listed on Schedule A thereto (the "Agreement")
is made as of this 28th day of December, 1992 by and among the Company, the investors listed on Schedule A attached hereto (the "Investors") and the undersigned holders of at least a majority of the outstanding shares of Registrable Securities (the "Consenting Holders").

WHEREAS, the Company has granted the holders of its Series A Preferred and Series B Preferred Stock certain registration rights under the Agreement;

WHEREAS, the Company proposes to sell and issue to the Investors up to 5,000,000 shares of its Series B Preferred Stock pursuant to that certain Series B Preferred Stock Purchase Agreement dated of even date herewith (the "Series B Agreement");

WHEREAS, as a condition of entering into the Series B Agreement, the Investors have requested that the Company extend to them the registration rights that were extended to the holders of Registrable Securities, with respect to the shares of Series B Preferred Stock set forth on Schedule A being purchased by them under the Series B Agreement; and

WHEREAS, the Consenting Holders have agreed to the extension of such registration rights to the Investors.

NOW, THEREFORE, in consideration of the mutual covenants set forth herein and for good and valuable consideration, the receipt of which is hereby acknowledged, the undersigned hereby agree as follows:

1. All terms not defined herein shall have the meaning set forth in the Agreement.

2. Each Investor shall be deemed an "Investor" under the Agreement.

3. Section 17(a) (iv) of the Agreement is hereby amended to read in its entirety as follows:

"(iv) 1,808,537 shares of the Company's Common Stock (or related options) issued to employees, officers or consultants of the Company pursuant to any employee stock offering, plan or arrangement approved by the Board of Directors;"

4. Section 18(e) of the Agreement entitled "Amendment of Agreement" is hereby amended to add to end of the first sentence thereof the following:


"; PROVIDED, HOWEVER, that no such amendment or waiver shall be effective to limit the application of the registration provisions of Section 6 or 7 hereof, unless the written instrument effecting such amendment or waiver shall be signed by a majority of the Registrable Securities which, as of the effective date of such instrument, do not have a two year holding period under Rule 144(d)."

5. Except as otherwise specifically provided herein, the Agreement shall remain in full force and effect, and the Investors shall be entitled to all the rights and subject to all the restrictions thereunder, including, but not limited to, the Market Stand-Off provisions of Section 14 thereof.

6. The Consenting Holders understand that the Investors on Schedule A represent the participants in the first closing under the Series B Agreement, and that additional participants may invest in a second closing to be held no later than thirty (30) days thereafter, provided that the aggregate number of shares of Series B Preferred Stock to be sold shall not exceed 5,000,000. The Consenting Holders agree that such additional participants shall be treated as Investors hereunder upon their execution of this Amendment and the addition of their names to Schedule A hereto.

7. This Amendment shall become effective upon the execution of this Amendment by the Company, the Investors and the holders of at least a majority of the Registrable Securities.

8. This Amendment may be signed in one or more counterparts, each of which shall be an original but all of which, taken together, shall constitute one and the same.

IN WITNESS WHEREOF, the parties hereto have executed this Agreement as of the day and year first above written.

The Company:                            NATUS MEDICAL INCORPORATED,
                                        a California corporation

                                        By: /s/ [ILLEGIBLE]
                                           --------------------------------
                                        Title:  PRESIDENT & CEO
                                              -----------------------------


Consenting Holders:
                                        TRINITY VENTURES II, L.P.,
                                        a California Limited Partnership

                                        By: Trinity TVL Partners, L.P.,
                                            Its General Partner

                                        By:  /s/ DAVID NIERENBERG
                                           --------------------------------

Title: GENERAL PARTNER

-2-

TRINITY VENTURES II, L.P.,
a California Limited Partnership

By: Trinity TVL Partners, L.P.,
Its General Partner

By: /s/ David Nierenberg
   -----------------------------
Title:  GENERAL PARTNER
      --------------------------

TRINITY SIDE-BY-SIDE I, L.P.
a California Limited Partnership

By: Trinity TVL Partners, L.P.,
Its General Partner

By:  /s/ David Nierenberg
   -----------------------------
Title:   GENERAL PARTNER
      --------------------------

DELPHI BIOVENTURES, L.P.

By: Delphi Management Partners
General Partner

By:  /s/ J. Bochnowski
   -----------------------------
Title:  GP
      --------------------------

DELPHI BI0INVESTMENTS, L.P.

By: Delphi Management Partners
General Partner

By:  /s/ J. Bochnowski
   -----------------------------
Title:  GP
      --------------------------


Henry H. Hamilton, MD

/s/ Larry Haimovitch
--------------------------------
Larry Haimovitch

-3-


Robin Wolaner

/s/ William New, Jr., MD
--------------------------------
William New, Jr., MD


/s/ John Porter
--------------------------------
John Porter


Maurizio Liverani

/s/ Jeffrey Harrison
--------------------------------
Jeffrey Harrison

William M. and Patricia A. Moore, Trustees under the Moore Family Trust Agreement April 8, 1988

By: /s/ William M. Moore
   -----------------------------
Title: Trustee
     ---------------------------

The Prinn Family Trust U.T.D.
11/11/79

By:_____________________________

Title:__________________________

WS INVESTMENTS 9lC

By: /s/ Robert P Latta
   -----------------------------

Title: V.P.
     ---------------------------


Tracie L. Austin


Mary Sinclair

-4-


John Turner

COMMUNICORE

By: /s/ [ILLEGIBLE]
   -----------------------------
Title:  PRESIDENT
      --------------------------


/s/ Ken Traverso
--------------------------------
Ken Traverso

/s/ Tamma Norwood
--------------------------------
Tamma Norwood

/s/ Neal Higgs
--------------------------------
Neal Higgs


Cathy Cates

/s/ Scott Kadash
--------------------------------
Scott Kadash

/s/ Kathryn M Gelbman
--------------------------------
Kathryn Gelbman

/s/ Stephanie Yanai
--------------------------------
Stephanie Yanai

/s/ Jennifer Brown
--------------------------------
Jennifer Brown


Rebecca Naa

/s/ Patricia Moore
--------------------------------
Patricia Moore

-5-

DELPHI BIOVENTURES II, L.P.

By: Delphi Management Partners, L.P.
General Partner

By:_____________________________

Title:__________________________

DELPHI BIOINVESTMENTS, L.P.

By: Delphi Management Partners, L.P.
General Partner

By:_____________________________

Title:__________________________

DELPHI BIOINVESTMENTS II, L.P.

By: Delphi Management Partners, L.P.
General Partner

By:_____________________________

Title:__________________________


William New, Jr.


John Porter

COMMUNICORE

By:_____________________________

Title:__________________________


Larry Haimovitch

/s/ Neal P. Higgs
--------------------------------
Neal P. Higgs

-7-

/s/ Scott Kadash
--------------------------------
Scott Kadash

/s/ Karen Schultheis
--------------------------------
Karen Schultheis

Funds identified by Berkeley International Capital Corporation:

-8-


Scott Kadash


Karen Schultheis

BERKELEY MEDICAL INVESTMENTS LIMITED

By: FOR KLEINWORT BENSON
(JERSEY) LIMITED AS CUSTODIAN

Title: [ILLEGIBLE]

DIRECTOR

BERKELEY/NED DEVELOPMENT CAPITAL
LIMITED

By: FOR KLEINWORT BENSON
(JERSEY) LIMITED AS CUSTODIAN

Title: [ILLEGIBLE]

DIRECTOR


Karen Schultheis

BERKELEY MEDICAL INVESTMENTS LIMITED

By:_________________________________

Title:______________________________

BERKELEY/NED DEVELOPMENT CAPITAL
LIMITED

By:_________________________________

Title:______________________________

SURVIVORS TRUST OF THE GELBMAN
FAMILY TRUST DATED JUNE 4, 1991

By: /s/ Kathryn  M Gelbman
   ---------------------------------

Title:  TRUSTEE
     -------------------------------

/s/ Tracie Mathisen
------------------------------------
Tracie Mathisen

/s/ Jennifer Brown
------------------------------------
Jennifer Brown

-9-

AMENDMENT NO. 2 TO

INFORMATION AND REGISTRATION RIGHTS AGREEMENT

This Amendment No. 2 to the Information and Registration Rights Agreement made as of August 15, 1991 and amended as of December 28, 1992 by and among Natus Medical Incorporated (the "Company") and the investors listed on Schedule A thereto (the "Agreement") is made as of this 12th day of June, 1995 by and among the Company, the investors listed on Schedule A attached hereto, as such Schedule may be amended from time to time to reflect additional investors in Subsequent Closings as defined in that certain Series C Preferred Stock Purchase Agreement (the "Series C Agreement") dated of even date herewith (the "Investors"), and the undersigned holders of at least a majority of the outstanding shares of Registrable Securities (the "Consenting Holders").

WHEREAS, the Company has granted the holders of its Series A Preferred and Series B Preferred Stock certain registration rights under the Agreement;

WHEREAS, the Company proposes to sell and issue to the Investors up to 2,222,223 shares of its Series C Preferred Stock pursuant to the Series C Agreement;

WHEREAS, as a condition of entering into the Series C Agreement, the Investors have requested that the Company extend to them the registration rights that were extended to the holders of Registrable Securities, with respect to the shares of Series C Preferred Stock set forth on Schedule A being purchased by them under the Series C Agreement; and

WHEREAS, the Consenting Holders have agreed to the extension of such registration rights to the Investors.

NOW, THEREFORE, in consideration of the mutual covenants set forth herein and for good and valuable consideration, the receipt of which is hereby acknowledged, the undersigned hereby agree as follows:

1. All terms not defined herein shall have the meaning set forth in the Agreement.

2. Each Investor shall be deemed an "Investor" under the Agreement.


3. Except as otherwise specifically provided herein, the Agreement shall remain in full force and effect, and the Investors shall be entitled to all the rights and subject to all the restrictions thereunder, including, but not limited to, the Market Stand-Off provisions of Section 14 thereof.

4. This Amendment shall become effective upon the execution of this Amendment by the Company, the Investors and the holders of at least a majority of the Registrable Securities.

5. This Amendment may be signed in one or more counterparts, each of which shall be an original but all of which, taken together, shall constitute one and the same.

IN WITNESS WHEREOF, the parties hereto have executed this Agreement as of the day and year first above written.

The Company:                            NATUS MEDICAL INCORPORATED,
                                        a California corporation

                                        By: _____________________________

                                        Title:___________________________

Consenting Holders:                     TRINITY VENTURES II, L.P.,
                                        a California Limited Partnership

                                        By:   Trinity TVL Partners, L.P.,
                                              Its General Partner

                                        By:______________________________

                                        Title:___________________________


                                         TRINITY VENTURES III, L.P.
                                         a California Limited Partnership

                                         By:   Trinity TVL Partners, L.P.,
                                               Its General Partner

                                        By:______________________________

                                        Title: __________________________

                                      -2-

                                        TRINITY SIDE-BY-SIDE I, L.P.
                                        a California Limited Partnership

                                        By:    Trinity TVL Partners, L.P.,
                                               Its General Partner

                                        By:______________________________

                                        Title:___________________________


                                        DELPHI VENTURES, L.P.

                                        By:  Delphi Management Partners
                                             General Partner

                                        By:______________________________

                                        Title:___________________________


                                        DELPHI VENTURES II, L.P.

                                        By:  Delphi Management Partners, L.P.
                                             General Partner

                                        By:______________________________

                                        Title:___________________________


                                        DELPHI INVESTMENTS, L.P.

                                        By:  Delphi Management Partners
                                             General Partner

                                        By:______________________________

                                        Title:___________________________

                                      -3-

                                        DELPHI INVESTMENTS II, L.P.

                                        By:    Delphi Management Partners, L.P.
                                               General Partner

                                        By:____________________________________

                                        Title:_________________________________


                                        _______________________________________
                                        Henry H. Hamilton, MD

                                        _______________________________________
                                        Larry Haimovitch

                                        _______________________________________
                                        Robin Wolaner

                                        _______________________________________
                                        William New, Jr., MD

                                        _______________________________________
                                        John Porter

                                        _______________________________________
                                        Maurizio Liverani

                                        _______________________________________
                                        Jeffrey Harrison

                                        WILLIAM M. AND PATRICIA A. MOORE,
                                        TRUSTEES UNDER THE MOORE FAMILY
                                        TRUST AGREEMENT APRIL 8, 1988

                                        By:____________________________________

                                        Title:_________________________________

                                      -4-

                                        THE PRINN FAMILY TRUST U.T.D.
                                        11/11/79

                                        By:__________________________

                                        Title:_______________________

                                        WS INVESTMENTS 9lC

                                        By:__________________________

                                        Title:_______________________

                                        _____________________________
                                        Tracie L. Austin Mathisen

                                        _____________________________
                                        Mary Sinclair

                                        COMMUNICORE

                                        By:__________________________

                                        Title:_______________________

                                        _____________________________
                                        Ken Traverso

                                        _____________________________
                                        Tamma Norwood Davis

                                        _____________________________
                                        Neal Higgs

                                       ______________________________
                                        Cathy Cates

                                      -5-

                                        _______________________________________
                                        Scott Kadash

                                        _______________________________________
                                        Stephanie Yanai Yamada

                                        _______________________________________
                                        Jennifer Brown

                                        _______________________________________
                                        Rebecca Maa

                                        _______________________________________
                                        Robert P. Latta

                                        _______________________________________
                                        Debra A. Jensen

                                        _______________________________________
                                        Clarence Blom

                                        _______________________________________
                                        Karen Schultheis

                                        BG SERVICES LIMITED

                                        By:____________________________________

                                        Title:_________________________________


                                        BERKELEY/NED DEVELOPMENT CAPITAL
                                        LIMITED

                                        By:____________________________________

                                      -6-

                                        Title:_________________________________


                                        CREDIT SHELTER TRUST OF THE
                                        GELBMAN FAMILY TRUST DTD 6/4/91

                                        By:____________________________________

                                        Title:_________________________________


                                        SURVIVORS TRUST OF THE GELBMAN
                                        FAMILY TRUST DATED JUNE 4, 1991

                                        By:____________________________________

                                        Title:_________________________________


                                        RABOBANK NOMINEES GUERNSEY LIMITED

                                        By:____________________________________

                                        Title:_________________________________


Investors:                              BG SERVICES LIMITED
(First Closing)
                                        By:____________________________________

                                        Title:_________________________________


                                        K.B. (C.I.) NOMINEES LIMITED AS
                                        NOMINEES FOR BERKELEY/NED DEVELOPMENT
                                        CAPITAL LIMITED

                                        By:____________________________________

                                        Title:_________________________________

                                      -7-

                                        TRINITY VENTURES II, L.P.,
                                        a California Limited Partnership

                                        By: Trinity TVL Partners, L.P.,
                                            Its General Partner

                                        By:____________________________________

                                        Title:_________________________________


                                        TRINITY VENTURES III, L.P.
                                        a California Limited Partnership

                                        By: Trinity TVL Partners, L.P.,
                                            Its General Partner

                                        By:____________________________________

                                        Title:_________________________________


                                        TRINITY SIDE-BY-SIDE I, L.P.
                                        a California Limited Partnership

                                        By: Trinity TVL Partners, L.P.,
                                            Its General Partner

                                        By:____________________________________

                                        Title: ________________________________


                                        DELPHI VENTURES, L.P.

                                        By: Delphi Management Partners
                                            General Partner

                                        By:____________________________________

                                        Title:_________________________________

                                      -8-

                                        DELPHI VENTURES II, L.P.

                                        By: Delphi Management Partners, L.P.
                                            General Partner

                                        By:____________________________________

                                        Title:_________________________________


                                        DELPHI INVESTMENTS, L.P.

                                        By: Delphi Management Partners
                                            General Partner

                                        By:____________________________________

                                        Title:_________________________________


                                        DELPHI INVESTMENTS II, L.P.

                                        By: Delphi Management Partners, L.P.
                                            General Partner

                                        By:____________________________________

                                        Title:_________________________________

                                        _______________________________________
                                        William New, Jr., MD

                                        _______________________________________
                                        William Oates

 Investors:
 (Subsequent Closings)
                                        _______________________________________
                                        A. Gene Banman

                                      -9-

                                        _______________________________________
                                        Laura Bordelman

                                        _______________________________________
                                        Cathy Cates

                                        _______________________________________
                                        Stacia Freeman

                                        _______________________________________
                                        Linda Fuggiti

                                        _______________________________________
                                        Neal Higgs

                                        _______________________________________
                                        Mary Beth Palacios

                                        _______________________________________
                                        John Porter

                                        _______________________________________
                                        Joseph Sarakaitis

                                        _______________________________________
                                        Rachel N. Than


                                        _______________________________________
                                        Ken Traverso

                                        _______________________________________
                                        Aaron Castro

-10-

AMENDMENT NO.3 TO

INFORMATION AND REGISTRATION RIGHTS AGREEMENT

This Amendment No. 3 to the Information and Registration Rights Agreement made as of August 15, 1991 and amended as of December 28, 1992 and June 12, 1995 by and among Natus Medical Incorporated (the "Company") and the investors listed on Schedule A thereto (the "Agreement") is made as of this 10th day of November, 1995 by and among the Company, the investors listed on Schedule A attached hereto, as such Schedule may be amended from time to time to reflect additional investors in Subsequent Closings as defined in that certain Series C Preferred Stock and Warrant Purchase Agreement (the "Series C Preferred Stock and Warrant Agreement") dated of even date herewith (the "Investors"), and the undersigned holders of at least a majority of the outstanding shares of Registrable Securities (the "Consenting Holders").

WHEREAS, the Company has granted the holders of its Series A Preferred, Series B Preferred and Series C Preferred Stock certain registration rights under the Agreement;

WHEREAS, the Company proposes to sell and issue to the Investors up to 2,443,062 additional shares of its Series C Preferred Stock and Warrants to purchase up to 3,053,827 shares of its Series C Preferred Stock pursuant to the Series C Preferred Stock and Warrant Agreement;

WHEREAS, as a condition of entering into the Series C Preferred Stock and Warrant Agreement, the Investors have requested that the Company extend to them the registration rights that were extended to the holders of Registrable Securities, with respect to the shares of Series C Preferred Stock and the Warrants to purchase Series C Preferred Stock set forth on Schedule A being purchased by them under the Series C Preferred Stock and Warrant Agreement; and

WHEREAS, the Consenting Holders have agreed to the extension of such registration rights to the Investors.

NOW, THEREFORE, in consideration of the mutual covenants set forth herein and for good and valuable consideration, the receipt of which is hereby acknowledged, the undersigned hereby agree as follows:

1. The term "Convertible Securities" as set forth in Section 1(b) of the Agreement shall be amended to read in its entirety:

"'Convertible Securities' shall mean the Series A, Series B and Series C Preferred Stock of the Company."

2. All terms not defined herein shall have the meaning set forth in the Agreement.


3. Each Investor shall be deemed an "Investor" under the Agreement.

4. Except as otherwise specifically provided herein, the Agreement shall remain in full force and effect, and the Investors shall be entitled to all the rights and subject to all the restrictions thereunder, including, but not limited to, the Market Stand-Off provisions of Section 14 thereof.

5. This Amendment shall become effective upon the execution of this Amendment by the Company, the Investors and the Consenting Holders.

6. This Amendment may be signed in one or more counterparts, each of which shall be an original but all of which, taken together, shall constitute one and the same.

IN WITNESS WHEREOF, the parties hereto have executed this Agreement as of the day and year first above written.

The Company:                    NATUS MEDICAL INCORPORATED,
                                a California corporation

                                    By:__________________________


                                    Title:_______________________



Investors:                          _____________________________
                                    William New, Jr.


                                DELPHI VENTURES, L.P.
                                    By: Delphi Management Partners, L.P.
                                        General Partner


                                    By:__________________________
                                             General Partner

                                    DELPHI VENTURES II, L.P.
                                    By: Delphi Management Partners II, L.P.
                                        General Partner


                                    By:_____________________________

                                DELPHI INVESTMENTS, L.P.
                                    By: Delphi Management Partners, L.P.
                                        General Partner


                                    By:__
                                          General Partner


                                    DELPHI INVESTMENTS II, L.P.
                                    By: Delphi Management Partners II, L.P.
                                        General Partner


                                    By:__
                                          General Partner


                                    TRINITY VENTURES II, L.P.,
                                    a California Limited Partnership

                                    By: Trinity TVL Partners, L.P.,
                                        Its General Partner


                                    By:__

                                    Title:_


                                    TRINITY VENTURES III, L.P.
                                    a California Limited Partnership

                                    By: Trinity TVL Partners, L.P.,
                                        Its General Partner


                                    By:__

                                    Title:_

                                    TRINITY SIDE-BY-SIDE I, L.P.
                                    a California Limited Partnership

                                    By: Trinity TVL Partners, L.P.,
                                        Its General Partner


                                    By:__

                                    Title:_

Subsequent Closing:
                                THE AURORA FUND


                                    By:__

                                    Title:_


                                    ______
                                    Allard C. & Mary K. Villere


                                    ______
                                    James D. & Carol A. Banman


                                    ______
                                    Laura Berdelman


                                    ______
                                    Cathy Cates


                                    ______
                                    Stacia Freeman


                                    ______
                                    Linda Fuggiti


                                    ______
                                    Neal Higgs

                                    ______
                                    Lin Murray


                                    ______
                                    Paula Ramey-Perez


                                    ______
                                    Joseph Sarakaitis


                                    ______
                                    Bernhard Sterling


                                    ______
                                    A. Gene Banman


                                    ______
                                    Esther and Steve Kadash


                                    ______
                                    Robin Wolaner


                                    ______
                                    Bret Herscher

                                    NOON ASSOCIATES, INC.


                                    By:__
                                         John Noon

                                    DAVID & PATRICIA NIERENBERG 1993
                                    IRREVOCABLE TRUST, LAWRENCE K.
                                    ORR TRUSTEE, JUNE 11, 1993


                                    By:__
                                          Trustee

                                    WS INVESTMENT COMPANY 96A


                                    By:__

                                    Title:__

                                    ______
                                    Michael and Jane Felmlee

                                    ______
                                    Joel Felmlee

                                    ______
                                    Larry Haimovitch


                                    GRACECHURCH CO.


                                    By:____________________________

                                    Title:_________________________


                                    _______________________________
                                    Ken Traverso

Consenting Holders:                 DELPHI VENTURES, L.P.
                                    By: Delphi Management Partners, L.P.
                                        General Partner


                                    By:__
                                          General Partner

                                    DELPHI VENTURES II, L.P.
                                    By: Delphi Management Partners II, L.P.
                                        General Partner


                                    By:__
                                          General Partner

                                    DELPHI INVESTMENTS, L.P.
                                    By: Delphi Management Partners, L.P.
                                        General Partner


                                    By:__
                                          General Partner


                                    DELPHI INVESTMENTS II, L.P.
                                    By: Delphi Management Partners II, L.P.
                                        General Partner


                                    By:__
                                         General Partner


                                    TRINITY VENTURES II, L.P.,
                                    a California Limited Partnership

                                    By: Trinity TVL Partners, L.P.,
                                        Its General Partner


                                    By:__

                                    Title:__

                                    TRINITY VENTURES III, L.P.
                                    a California Limited Partnership

                                    By: Trinity TVL Partners, L.P.,
                                        Its General Partner


                                    By:__

                                    Title:_

                                    TRINITY SIDE-BY-SIDE I, L.P.
                                    a California Limited Partnership

                                    By: Trinity TVL Partners, L.P.,
                                        Its General Partner


                                    By:__

                                    Title:_


                                    ______
                                    Henry H. Hamilton, MD


                                    ______
                                    Larry Haimovitch


                                    ______
                                    Robin Wolaner


                                    ______
                                    William New, Jr., MD


                                    ______
                                    John Porter


                                    ______
                                    Maurizio Liverani


                                    ______
                                    Jeffrey Harrison

                                    WILLIAM M. AND PATRICIA A. MOORE,
                                    TRUSTEES UNDER THE MOORE FAMILY
                                    TRUST AGREEMENT APRIL 8, 1988


                                    By:__

                                    Title:_


                                THE PRINN FAMILY TRUST U.T.D. 11/11/79


                                    By:__

                                    Title:_


                                    WS INVESTMENTS 91C


                                    By:__

                                    Title:_


                                    ______
                                    Tracie L. Austin Mathisen


                                    ______
                                    Mary Sinclair


                                    COMMUNICORE

                                    By:__

                                    Title:_


                                    ______
                                    Ken Traverso


                                    ______
                                    Tamma Norwood Davis

                                    ______
                                    Neal Higgs


                                    ______
                                    Cathy Cates


                                    ______
                                    Scott Kadash


                                    ______
                                    Stephanie Yanai Yamada


                                    ______
                                    Jennifer Brown


                                    ______
                                    Rebecca Maa


                                    ______
                                    Robert P. Latta


                                    __________________________
                                    Debra A. Jensen


                                    ______
                                    Clarence Blom


                                    ______
                                    Karen Schultheis

Natus Medical - Information and Registration Rights Agreement

11

BG SERVICES LIMITED

By:__

Title:_

CREDIT SHELTER TRUST OF THE
GELBMAN FAMILY TRUST DTD 6/4/91

By:__

Title:_

SURVIVORS TRUST OF THE GELBMAN
FAMILY TRUST DATED JUNE 4, 1991

By:__

Title:_

RABOBANK NOMINEES GUERNSEY
LIMITED

By:__

Title:_

K.B. (C.I.) NOMINEES LIMITED AS
NOMINEES FOR BERKELEY/NED
DEVELOPMENT CAPITAL LIMITED

By:__

Title:_

Natus Medical - Information and Registration Rights Agreement

12


William Oates


A. Gene Banman


Laura Berdelman


Stacia Freeman


Linda Fuggiti


Marybeth Bach-Palacios


Joseph Sarakaitis


Rachel N. Than


Aaron Castro

Natus Medical - Information and Registration Rights Agreement

13

GRACECHURCH CO.

By:________________________________

Title:_____________________________


Ken Traverso

Natus Medical - Information and Registration Rights Agreement

14

AMENDMENT NO. 4 TO

INFORMATION AND REGISTRATION RIGHTS AGREEMENT

This Amendment No. 4 to the Information and Registration Rights Agreement made as of August 15, 1991 and amended as of December 28, 1992 and June 12, 1995 and November 10, 1995 by and among Natus Medical Incorporated (the "Company") and the investors listed on Schedule A thereto (the "Agreement") is made as of this 23th day of April, 1997 by and among the Company, Medical Research Council, London, United Kingdom ("MRC"), Synergy Partners ("Synergy"), the investors listed on Schedule A attached hereto, who are parties to that certain Series D Preferred Stock Purchase Agreement (the "Series D Preferred Stock Agreement") dated of even date herewith (collectively with MRC and Synergy, the "Series D Purchasers"), and the undersigned holders of at least a majority of the outstanding shares of Registrable Securities (the "Consenting Holders").

WHEREAS, the Company has granted the holders of its Series A Preferred, Series B Preferred and Series C Preferred Stock certain registration rights under the Agreement;

WHEREAS, the Company proposes to sell and issue to the Series D Purchasers up to 4,000,000 shares of its Series D Preferred Stock pursuant to the Series D Preferred Stock Agreement, and as part of that total number of Series D Preferred Stock (i) to issue to MRC up to 40,000,000 shares as a payment of certain of the Company's royalty obligations to MRC and (ii) to issue to Synergy as a placement fee of up to 2.5 percent of the proceeds of the offering to Japanese investors represented by Synergy;

WHEREAS, as a condition of entering into the Series D Preferred Stock Agreement, the Series D Purchasers have requested that the Company extend to them the registration rights that were extended to the holders of Registrable Securities, with respect to the shares of Series D Preferred Stock set forth on Schedule A being purchased by them under the Series D Preferred Stock Agreement or otherwise acquired;

WHEREAS, pursuant to Sections 12 and 17 of the Agreement, the Agreement may be amended by the written consent of the Company and the Series A Preferred, Series B Preferred and Series C Preferred holding at least a majority of the Registrable Securities as defined in the Agreement; and

WHEREAS, The Company and the Consenting Holders having not less than the minimum number of shares required to amend the Agreement have consented in writing to this Amendment whereby the information and registration rights will be extended to the Series D Preferred Stock Purchasers.


NOW, THEREFORE, in consideration of the mutual covenants set forth herein and for good and valuable consideration, the receipt of which is hereby acknowledged, the undersigned hereby agree as follows:

1. The term "Convertible Securities" as set forth in Section 1(b) of the Agreement shall be amended to read in its entirety:

"'Convertible Securities' shall mean the Series A, Series B, Series C and Series D Preferred Stock of the Company."

2. Section 17(a)(iv) of the Agreement is hereby amended to read in its entirety as follows:

"up to 3,483,705 shares of Common Stock issued to officers, directors, and employees of and consultants to, the Corporation to be designated and approved by the Board of Directors;"

3. All terms not defined herein shall have the meaning set forth in the Agreement.

4. Each Series D Purchaser shall be deemed an "Investor" under the Agreement.

5. Except as otherwise specifically provided herein, the Agreement shall remain in full force and effect, and the Series D Purchasers shall be entitled to all the rights and subject to all the restrictions thereunder, including, but not limited to, the Market Stand-Off provisions of Section 14 thereof.

6. The Consenting Holders understand that the minimum and the maximum number of shares of Series D Preferred Stock to be sold shall not be less than 1,600,000 shares or more than 4,000,000 shares.

7. This Amendment shall become effective upon the execution of this Amendment by the Company, the Series D Purchasers and the Consenting Holders.

8. This Amendment may be signed in one or more counterparts, each of which shall be an original but all of which, taken together, shall constitute one and the same.

-2-

IN WITNESS WHEREOF, the parties hereto have executed this Agreement as of the day and year first above written.

NATUS MEDICAL INCORPORATED,
a California corporation

By: /s/ [ILLEGIBLE]
    -----------------------------------------

Title: PRESIDENT
      ---------------------------------------

[Amendment No. 4 to Information and Registration Rights Agreement Signature Page]

-3-

AURORA VENTURES LLC

By:/s/ [ILLEGIBLE]
   ------------------------------------------

Title: GENERAL PARTNER (MANAGER)
      ---------------------------------------


/s/ MaryBeth Bach-Palacios
---------------------------------------------
MaryBeth Bach-Palacios


/s/ A. Gene Banman
---------------------------------------------
A. Gene Banman


/s/ [ILLEGIBLE]
---------------------------------------------
James D. & Carol A. Banman


/s/ Laura Berdelman
---------------------------------------------
Laura Berdelman

BG SERVICES LIMITED

By: /s/ [ILLEGIBLE]
   ------------------------------------------

Title: Directors
      ---------------------------------------


Clarence Blom

/s/ Jennifer Brown
---------------------------------------------
Jennifer Brown

[Amendment No. 4 to Information and Registration Rights Agreement Signature Page]

-4-

/s/ Aaron Castro
---------------------------------------------
Aaron Castro


/s/ Cathy Cates
---------------------------------------------
Cathy Cates

COMMUNICORE

By: /s/ [ILLEGIBLE]
   ------------------------------------------

Title: [ILLEGIBLE] PRESIDENT
      ---------------------------------------


Tamma Norwood Davis

DELPHI VENTURES, L.P.
By: Delphi Management Partners II, L.P.
General Partner

By: /s/ [ILLEGIBLE]
   ------------------------------------------
        General Partner

DELPHI VENTURES II, L.P.
By: Delphi Management Partners II, L.P.
General Partner

By: /s/ [ILLEGIBLE]
   ------------------------------------------
        General Partner

[Amendment No. 4 to Information and Registration Rights Agreement Signature Page]

-5-

DELPHI INVESTMENTS, L.P.
By: Delphi Management Partners II, L.P.
General Partner

By: /s/ [ILLEGIBLE]
   ------------------------------------------
        General Partner

DELPHI INVESTMENTS II, L.P.
By: Delphi Management Partners II, L.P.
General Partner

By: /s/ [ILLEGIBLE]
    -----------------------------------------
        General Partner


/s/ Michael W. Felmlee / Jane E. Felmlee
---------------------------------------------
Michael and Jane Felmlee


/s/ Joel Felmlee
---------------------------------------------
Joel Felmlee


/s/ Stacia Freeman
---------------------------------------------
Stacia Freeman


/s/ Linda A. Fuggiti Richard A. Fuggiti
---------------------------------------------
Linda A. & Richard A. Fuggiti

GRACECHURCH CO.

By:__________________________________________

Title:_______________________________________

CREDIT SHELTER TRUST OF THE
GELBMAN FAMILY TRUST DTD 6/4/91

By:__________________________________________

Title:_______________________________________

[Amendment No. 4 to Information and Registration Rights Agreement Signature Page]

-6-

CREDIT SHELTER TRUST OF THE
GELBMAN FAMILY TRUST DTD 6/4/91

By: Judy Collins

Title: P.O.A. For Kathryn Gelbman

SURVIVORS TRUST OF THE GELBMAN
FAMILY TRUST DATED JUNE 4, 1991

By: Judy Collins

Title: P.O.A. for Kathyryn Gelbman


Larry Haimovitch


Henry H. Hamilton, MD

/s/ [ILLEGIBLE]
---------------------------------------------
Jeffrey Harrison


Bret Herscher

/s/ [ILLEGIBLE]
---------------------------------------------
Neal Higgs


/s/ Debra A. Jensen
---------------------------------------------
Debra A. Jensen

[Amendment No. 4 to Information and Registration Rights Agreement Signature Page]

-7-


Scott Kadash

/s/ Esther and Steve Kadash
---------------------------------------------
Esther and Steve Kadash

K.B. (C.I.) NOMINEES LIMITED AS
NOMINEES FOR BERKELEY/NED DEVELOPMENT CAPITAL
LIMITED

By: -----------------------------------------

Title:[ILLEGIBLE]

/s/ Robert P. Latta
---------------------------------------------
Robert P. Latta


/s/ [ILLEGIBLE]
---------------------------------------------
Maurizio Liverani


/s/ Rebecca Maa
---------------------------------------------
Rebecca Maa


Joseph N. Mamola


Dorothy P. Mamola

[Amendment No. 4 to Information and Registration Rights Agreement Signature Page]

-8-


William T. Mamola

/s/ Tracie L. Austin Mathisen
---------------------------------------------
Tracie L. Austin Mathisen

WILLIAM M. AND PATRICIA A. MOORE,
TRUSTEES UNDER THE MOORE FAMILY
TRUST AGREEMENT APRIL 8, 1988

By: /s/ [ILLEGIBLE]
---------------------------------------------

Title: TRUSTEE
---------------------------------------------


/s/ Lin S. Murray
---------------------------------------------
Lin Murray

William New. Jr.
William New, Jr.

DAVID & PATRICIA NIERENBERG 1993 IRREVOCABLE
TRUST, LAWRENCE K. ORR TRUSTEE JUNE 11, 1993

By: -----------------------------------------
Trustee

NOON ASSOCIATES, INC.

By: /s/ John Noon
---------------------------------------------
       John Noon


/s/ [ILLEGIBLE]
---------------------------------------------
Williams Oates

[Amendment No. 4 to Information and Registration Rights Agreement Signature Page]

-9-


William Oates

PANTHEON INTERNATIONAL PARTICIPATIONS PLC

By: /s/ R. D. Wright
    -----------------------------------------

Title: Director Pantheon Ventures Ltd as
       --------------------------------------
       Manager of Pantheon International
          Participations Plc.


John Porter

THE PRINN FAMILY TRUST U.T.D. 11/11/79

By:------------------------------------------

Title:---------------------------------------

RABOBANK NOMINEES GUERNSEY LIMITED

By: -----------------------------------------

Title:---------------------------------------


Paula Ramey-Perez


Joseph Sarakaitis

[Amendment No. 4 to Information and Registration Rights Agreement Signature Page]

-10-


Karen Schultheis


Mary Sinclair

/s/ [ILLEGIBLE]
---------------------------------------------
Bernhard Sterling


Rachel N. Than

/s/ Ken Traverso
---------------------------------------------
Ken Traverso

TRINITY VENTURES III, L.P.,
a California Limited Partnership

By: Trinity TVL Partners, L.P.,
Its General Partner

By: /s/ [ILLEGIBLE]
    -----------------------------------------

Title: General Partner
       --------------------------------------

TRINITY VENTURES III, L.P.
a California Limited Partnership

By: Trinity TVL Partners, L.P.,
Its General Partner

By: /s/ [ILLEGIBLE]
    -----------------------------------------

Title: General Partner
       --------------------------------------

[Amendment No. 4 to Information and Registration Rights Agreement Signature Page]

-11-

TRINITY SIDE-BY-SIDE I, L.P.
a California Limited Partnership

By: Trinity TVL Partners, L.P.,
Its General Partner

By:

Title:

/s/ Allard C. Villere Mary K. Villere
---------------------------------------------
Allard C. Villere Mary K. Villere


/s/ Robin Wolaner
---------------------------------------------
Robin Wolaner

WS INVESTMENT COMPANY 96A

By: /s/ [ILLEGIBLE]
    -----------------------------------------

Title: [ILLEGIBLE]
       --------------------------------------

WS INVESTMENT COMPANY 96A

By: /s/ [ILLEGIBLE]
    -----------------------------------------

Title:[ILLEGIBLE]
      ---------------------------------------


Stephanie Yamada Yoshii

[Amendment No. 4 to Information and Registration Rights Agreement Signature Page]

-12-

INVESTORS IN FIRST CLOSING:

MEDICAL RESEARCH COUNCIL

By: /s/ [ILLEGIBLE]
    -----------------------------------------

Title: Head of Technology Transfer Group
       --------------------------------------

SYNERGY PARTNERS

By:

Title:

NIKKO CAPITAL CO., LTD.

By: /s/ Y. Chitani
    -----------------------------------------
        Yoshio Chitani

Title:  Deputy General Manager, International
        -------------------------------------
        Division
        -------------------------------------

NC NO. 2 INVESTMENTS ENTERPRISE PARTNERSHIP
(ASIA)

By: /s/ Y. Chitani
    -----------------------------------------
        Yoshio Chitani

Title:  Deputy General Manager, International
        -------------------------------------
        Division
        -------------------------------------

NC NO. 7 INVESTMENTS ENTERPRISE PARTNERSHIP
(ASIA PACIFIC)

By: /s/ Y. Chitani
    -----------------------------------------
        Yoshio Chitani

Title:  Deputy General Manager, International
        -------------------------------------
        Division
        -------------------------------------

[Amendment No. 4 to Information and Registration Rights Agreement Signature Page]

-13-

/s/ Theresa M. Baker
---------------------------------------------
Theresa M. Baker


/s/ Mary J. Banfield
---------------------------------------------
Mary J. Banfield

BROYHILL INVESTMENTS

By: /s/ M. Hunt Broyhill
    -----------------------------------------
    M. Hunt Broyhill

Title: President
       --------------------------------------


/s/ Joseph L. Connolly
---------------------------------------------
Joseph L. Connolly


/s/ [ILLEGIBLE]
---------------------------------------------
Stephen C. Davis


/s/ William Douglas
---------------------------------------------
William Douglas

[Amendment No. 4 to Information and Registration Rights Agreement Signature Page]

-14-

/s/ William J. Ducas
---------------------------------------------
William J. Ducas


/s/ Anthony Holland & Melissa L. Holland
---------------------------------------------
Anthony Holland & Melissa L. Holland


/s/ Cheryl Jaszewski
---------------------------------------------
Cheryl Jaszewski


/s/ [ILLEGIBLE]
---------------------------------------------
Andrew Kyrylenko


/s/ James M. Oates
---------------------------------------------
James M. Oates


/s/ Karen Sukle
---------------------------------------------
Karen Sukle


/s/ Todd A. Swenson & Ann M. Swenson
---------------------------------------------
Todd A. and Ann M. Swenson

WS INVESTMENT COMPANY 97A

By: /s/ [ILLEGIBLE]
    -----------------------------------------

Title: V. P.
       --------------------------------------

[Amendment No. 4 to Information and Registration Rights Agreement Signature Page]

-15-

EXHIBIT 10.1

NATUS MEDICAL INCORPORATED

INDEMNIFICATION AGREEMENT

This Indemnification Agreement ("Agreement") is effective as of ___________, 2000 by and between Natus Medical Incorporated, a Delaware corporation (the "Company"), and ______________ ("Indemnitee").

WHEREAS, the Company desires to attract and retain the services of highly qualified individuals, such as Indemnitee, to serve the Company and its related entities;

WHEREAS, in order to induce Indemnitee to continue to provide services to the Company, the Company wishes to provide for the indemnification of, and the advancement of expenses to, Indemnitee to the maximum extent permitted by law;

WHEREAS, the Company and Indemnitee recognize the continued difficulty in obtaining liability insurance for the Company's directors, officers, employees, agents and fiduciaries, the significant increases in the cost of such insurance and the general reductions in the coverage of such insurance;

WHEREAS, the Company and Indemnitee further recognize the substantial increase in corporate litigation in general, subjecting directors, officers, employees, agents and fiduciaries to expensive litigation risks at the same time as the availability and coverage of liability insurance has been severely limited;

WHEREAS, the Company is the successor to Natus Medical Incorporated, a California corporation; and

WHEREAS, in connection with the Company's initial public offering, the Company and Indemnitee desire to continue to have in place the additional protection provided by an indemnification agreement, with such changes as are required to conform the existing agreement to Delaware law and to provide indemnification and advancement of expenses to the Indemnitee to the maximum extent permitted by Delaware law;

WHEREAS, in view of the considerations set forth above, the Company desires that Indemnitee shall be indemnified and advanced expenses by the Company as set forth herein;

NOW, THEREFORE, the Company and Indemnitee hereby agree as set forth below.

1. Certain Definitions.

a. "Change in Control" shall mean, and shall be deemed to have occurred if, on or after the date of this Agreement, (i) any "person" (as such term is used in Sections 13(d) and 14(d) of the Securities Exchange Act of 1934, as amended), other than a trustee or other fiduciary holding securities under an employee benefit plan of the Company acting in such capacity or a corporation


owned directly or indirectly by the Shareholders of the Company in substantially the same proportions as their ownership of stock of the Company, becomes the "beneficial owner" (as defined in Rule 13d-3 under said Act), directly or indirectly, of securities of the Company representing more than 50% of the total voting power represented by the Company's then outstanding Voting Securities,
(ii) during any period of two consecutive years, individuals who at the beginning of such period constitute the Board of Directors of the Company and any new director whose election by the Board of Directors or nomination for election by the Company's Shareholders was approved by a vote of at least two thirds (2/3) of the directors then still in office who either were directors at the beginning of the period or whose election or nomination for election was previously so approved, cease for any reason to constitute a majority thereof,
(iii) the Shareholders of the Company approve a merger or consolidation of the Company with any other corporation other than a merger or consolidation which would result in the Voting Securities of the Company outstanding immediately prior thereto continuing to represent (either by remaining outstanding or by being converted into Voting Securities of the surviving entity) at least 80% of the total voting power represented by the Voting Securities of the Company or such surviving entity outstanding immediately after such merger or consolidation, or (iv) the Shareholders of the Company approve a plan of complete liquidation of the Company or an agreement for the sale or disposition by the Company of (in one transaction or a series of related transactions) all or substantially all of the Company's assets.

b. "Claim" shall mean with respect to a Covered Event: any threatened, pending or completed action, suit, proceeding or alternative dispute resolution mechanism, or any hearing, inquiry or investigation that Indemnitee in good faith believes might lead to the institution of any such action, suit, proceeding or alternative dispute resolution mechanism, whether civil, criminal, administrative, investigative or other.

c. References to the "Company" shall include, in addition to Natus Medical Incorporated, any constituent corporation (including any constituent of a constituent) absorbed in a consolidation or merger to which Natus Medical Incorporated (or any of its wholly owned subsidiaries) is a party which, if its separate existence had continued, would have had power and authority to indemnify its directors, officers, employees, agents or fiduciaries, so that if Indemnitee is or was a director, officer, employee, agent or fiduciary of such constituent corporation, or is or was serving at the request of such constituent corporation as a director, officer, employee, agent or fiduciary of another corporation, partnership, joint venture, employee benefit plan, trust or other enterprise, Indemnitee shall stand in the same position under the provisions of this Agreement with respect to the resulting or surviving corporation as Indemnitee would have with respect to such constituent corporation if its separate existence had continued.

d. "Covered Event" shall mean any event or occurrence related to the fact that Indemnitee is or was a director, officer, employee, agent or fiduciary of the Company, or any subsidiary of the Company, or is or was serving at the request of the Company as a director, officer, employee, agent or fiduciary of another corporation, partnership, joint venture, trust or other enterprise, or by reason of any action or inaction on the part of Indemnitee while serving in such capacity.

e. "Expenses" shall mean any and all expenses (including attorneys' fees and all other costs, expenses and obligations incurred in connection with investigating, defending, being a witness in or participating in (including on appeal), or preparing to defend, to be a witness in or to

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participate in, any action, suit, proceeding, alternative dispute resolution mechanism, hearing, inquiry or investigation), judgments, fines, penalties and amounts paid in settlement (if such settlement is approved in advance by the Company, which approval shall not be unreasonably withheld) of any Claim and any federal, state, local or foreign taxes imposed on the Indemnitee as a result of the actual or deemed receipt of any payments under this Agreement.

f. "Expense Advance" shall mean a payment to Indemnitee pursuant to
Section 3 of Expenses in advance of the settlement of or final judgement in any action, suit, proceeding or alternative dispute resolution mechanism, hearing, inquiry or investigation which constitutes a Claim.

g. "Independent Legal Counsel" shall mean an attorney or firm of attorneys, selected in accordance with the provisions of Section 2(d) hereof, who shall not have otherwise performed services for the Company or Indemnitee within the last three years (other than with respect to matters concerning the rights of Indemnitee under this Agreement, or of other Indemnitees under similar indemnity agreements).

h. References to "other enterprises" shall include employee benefit plans; references to "fines" shall include any excise taxes assessed on Indemnitee with respect to an employee benefit plan; and references to "serving at the request of the Company" shall include any service as a director, officer, employee, agent or fiduciary of the Company which imposes duties on, or involves services by, such director, officer, employee, agent or fiduciary with respect to an employee benefit plan, its participants or its beneficiaries; and if Indemnitee acted in good faith and in a manner Indemnitee reasonably believed to be in the interest of the participants and beneficiaries of an employee benefit plan, Indemnitee shall be deemed to have acted in a manner "not opposed to the best interests of the Company" as referred to in this Agreement.

i. "Reviewing Party" shall mean, subject to the provisions of Section
2(d), any person or body appointed by the Board of Directors in accordance with applicable law to review the Company's obligations hereunder and under applicable law, which may include a member or members of the Company's Board of Directors, Independent Legal Counsel or any other person or body not a party to the particular Claim for which Indemnitee is seeking indemnification.

j. "Section" refers to a section of this Agreement unless otherwise indicated.

k. "Voting Securities" shall mean any securities of the Company that vote generally in the election of directors.

-3-

2. Indemnification.

a. Indemnification of Expenses. Subject to the provisions of Section 2(b) below, the Company shall indemnify Indemnitee for Expenses to the fullest extent permitted by law if Indemnitee was or is or becomes a party to or witness or other participant in, or is threatened to be made a party to or witness or other participant in, any Claim (whether by reason of or arising in part out of a Covered Event), including all interest, assessments and other charges paid or payable in connection with or in respect of such Expenses.

b. Review of Indemnification Obligations. Notwithstanding the foregoing, in the event any Reviewing Party shall have determined (in a written opinion, in any case in which Independent Legal Counsel is the Reviewing Party) that Indemnitee is not entitled to be indemnified hereunder under applicable law, (i) the Company shall have no further obligation under Section 2(a) to make any payments to Indemnitee not made prior to such determination by such Reviewing Party, and (ii) the Company shall be entitled to be reimbursed by Indemnitee (who hereby agrees to reimburse the Company) for all Expenses theretofore paid to Indemnitee to which Indemnitee is not entitled hereunder under applicable law; provided, however, that if Indemnitee has commenced or thereafter commences legal proceedings in a court of competent jurisdiction to secure a determination that Indemnitee is entitled to be indemnified hereunder under applicable law, any determination made by any Reviewing Party that Indemnitee is not entitled to be indemnified hereunder under applicable law shall not be binding and Indemnitee shall not be required to reimburse the Company for any Expenses theretofore paid in indemnifying Indemnitee until a final judicial determination is made with respect thereto (as to which all rights of appeal therefrom have been exhausted or lapsed). Indemnitee's obligation to reimburse the Company for any Expenses shall be unsecured and no interest shall be charged thereon.

c. Indemnitee Rights on Unfavorable Determination; Binding Effect.
If any Reviewing Party determines that Indemnitee substantively is not entitled to be indemnified hereunder in whole or in part under applicable law, Indemnitee shall have the right to commence litigation seeking an initial determination by the court or challenging any such determination by such Reviewing Party or any aspect thereof, including the legal or factual bases therefor, and, subject to the provisions of Section 15, the Company hereby consents to service of process and to appear in any such proceeding. Absent such litigation, any determination by any Reviewing Party shall be conclusive and binding on the Company and Indemnitee.

d. Selection of Reviewing Party; Change in Control. If there has not been a Change in Control, any Reviewing Party shall be selected by the Board of Directors, and if there has been such a Change in Control (other than a Change in Control which has been approved by a majority of the Company's Board of Directors who were directors immediately prior to such Change in Control), any Reviewing Party with respect to all matters thereafter arising concerning the rights of Indemnitee to indemnification of Expenses under this Agreement or any other agreement or under the Company's Articles of Incorporation or Bylaws as now or hereafter in effect, or under any other applicable law, if desired by Indemnitee, shall be Independent Legal Counsel selected by Indemnitee and approved by the Company (which approval shall not be unreasonably withheld). Such counsel, among other things, shall render its written opinion to the Company and Indemnitee as to whether and to what extent Indemnitee would be entitled to be indemnified hereunder under applicable law

-4-

and the Company agrees to abide by such opinion. The Company agrees to pay the reasonable fees of the Independent Legal Counsel referred to above and to indemnify fully such counsel against any and all expenses (including attorneys' fees), claims, liabilities and damages arising out of or relating to this Agreement or its engagement pursuant hereto. Notwithstanding any other provision of this Agreement, the Company shall not be required to pay Expenses of more than one Independent Legal Counsel in connection with all matters concerning a single Indemnitee, and such Independent Legal Counsel shall be the Independent Legal Counsel for any or all other Indemnitees unless (i) the employment of separate counsel by one or more Indemnitees has been previously authorized by the Company in writing, or (ii) an Indemnitee shall have provided to the Company a written statement that such Indemnitee has reasonably concluded that there may be a conflict of interest between such Indemnitee and the other Indemnitees with respect to the matters arising under this Agreement.

e. Mandatory Payment of Expenses. Notwithstanding any other provision of this Agreement other than Section 10 hereof, to the extent that Indemnitee has been successful on the merits or otherwise, including, without limitation, the dismissal of an action without prejudice, in defense of any Claim, Indemnitee shall be indemnified against all Expenses incurred by Indemnitee in connection therewith.

3. Expense Advances.

a. Obligation to Make Expense Advances. Upon receipt of a written undertaking by or on behalf of the Indemnitee to repay such amounts if it shall ultimately be determined that the Indemnitee is not entitled to be indemnified therefore by the Company hereunder under applicable law, the Company shall make Expense Advances to Indemnitee.

b. Form of Undertaking. Any obligation to repay any Expense Advances hereunder pursuant to a written undertaking by the Indemnitee shall be unsecured and no interest shall be charged thereon.

c. Determination of Reasonable Expense Advances. The parties agree that for the purposes of any Expense Advance for which Indemnitee has made written demand to the Company in accordance with this Agreement, all Expenses included in such Expense Advance that are certified by affidavit of Indemnitee's counsel as being reasonable shall be presumed conclusively to be reasonable.

4. Procedures for Indemnification and Expense Advances.

a. Timing of Payments. All payments of Expenses (including without limitation Expense Advances) by the Company to the Indemnitee pursuant to this Agreement shall be made to the fullest extent permitted by law as soon as practicable after written demand by Indemnitee therefor is presented to the Company, but in no event later than thirty (30) business days after such written demand by Indemnitee is presented to the Company, except in the case of Expense Advances, which shall be made no later than ten (10) business days after such written demand by Indemnitee is presented to the Company.

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b. Notice/Cooperation by Indemnitee. Indemnitee shall, as a condition precedent to Indemnitee's right to be indemnified or Indemnitee's right to receive Expense Advances under this Agreement, give the Company notice in writing as soon as practicable of any Claim made against Indemnitee for which indemnification will or could be sought under this Agreement. Notice to the Company shall be directed to the Chief Executive Officer of the Company at the address shown on the signature page of this Agreement (or such other address as the Company shall designate in writing to Indemnitee). In addition, Indemnitee shall give the Company such information and cooperation as it may reasonably require and as shall be within Indemnitee's power.

c. No Presumptions; Burden of Proof. For purposes of this Agreement, the termination of any Claim by judgment, order, settlement (whether with or without court approval) or conviction, or upon a plea of nolo

contendere, or its equivalent, shall not create a presumption that Indemnitee did not meet any particular standard of conduct or have any particular belief or that a court has determined that indemnification is not permitted by this Agreement or applicable law. In addition, neither the failure of any Reviewing Party to have made a determination as to whether Indemnitee has met any particular standard of conduct or had any particular belief, nor an actual determination by any Reviewing Party that Indemnitee has not met such standard of conduct or did not have such belief, prior to the commencement of legal proceedings by Indemnitee to secure a judicial determination that Indemnitee should be indemnified under this Agreement under applicable law, shall be a defense to Indemnitee's claim or create a presumption that Indemnitee has not met any particular standard of conduct or did not have any particular belief. In connection with any determination by any Reviewing Party or otherwise as to whether the Indemnitee is entitled to be indemnified hereunder under applicable law, the burden of proof shall be on the Company to establish that Indemnitee is not so entitled.

d. Notice to Insurers. If, at the time of the receipt by the Company of a notice of a Claim pursuant to Section 4(b) hereof, the Company has liability insurance in effect which may cover such Claim, the Company shall give prompt notice of the commencement of such Claim to the insurers in accordance with the procedures set forth in the respective policies. The Company shall thereafter take all necessary or desirable action to cause such insurers to pay, on behalf of the Indemnitee, all amounts payable as a result of such Claim in accordance with the terms of such policies.

e. Selection of Counsel. In the event the Company shall be obligated hereunder to provide indemnification for or make any Expense Advances with respect to the Expenses of any Claim, the Company, if appropriate, shall be entitled to assume the defense of such Claim with counsel approved by Indemnitee (which approval shall not be unreasonably withheld) upon the delivery to Indemnitee of written notice of the Company's election to do so. After delivery of such notice, approval of such counsel by Indemnitee and the retention of such counsel by the Company, the Company will not be liable to Indemnitee under this Agreement for any fees or expenses of separate counsel subsequently retained by or on behalf of Indemnitee with respect to the same Claim; provided that, (i) Indemnitee shall have the right to employ Indemnitee's separate counsel in any such Claim at Indemnitee's expense and (ii) if (A) the employment of separate counsel by Indemnitee has been previously authorized by the Company, (B) Indemnitee shall have reasonably concluded that there may be a conflict of interest between the Company and Indemnitee in the conduct of any such defense, or (C) the Company shall not continue to retain such counsel to defend

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such Claim, then the fees and expenses of Indemnitee's separate counsel shall be Expenses for which Indemnitee may receive indemnification or Expense Advances hereunder.

5. Additional Indemnification Rights; Nonexclusivity.

a. Scope. The Company hereby agrees to indemnify the Indemnitee to the fullest extent permitted by law, notwithstanding that such indemnification is not specifically authorized by the other provisions of this Agreement, the Company's Articles of Incorporation, the Company's Bylaws or by statute. In the event of any change after the date of this Agreement in any applicable law, statute or rule which expands the right of a California corporation to indemnify a member of its board of directors or an officer, employee, agent or fiduciary, it is the intent of the parties hereto that Indemnitee shall enjoy by this Agreement the greater benefits afforded by such change. In the event of any change in any applicable law, statute or rule which narrows the right of a California corporation to indemnify a member of its board of directors or an officer, employee, agent or fiduciary, such change, to the extent not otherwise required by such law, statute or rule to be applied to this Agreement, shall have no effect on this Agreement or the parties' rights and obligations hereunder except as set forth in Section 10(a) hereof.

b. Nonexclusivity. The indemnification and the payment of Expense Advances provided by this Agreement shall be in addition to any rights to which Indemnitee may be entitled under the Company's Articles of Incorporation, its Bylaws, any other agreement, any vote of Shareholders or disinterested directors, the Corporation Law of the State of California, or otherwise. The indemnification and the payment of Expense Advances provided under this Agreement shall continue as to Indemnitee for any action taken or not taken while serving in an indemnified capacity even though subsequent thereto Indemnitee may have ceased to serve in such capacity.

6. No Duplication of Payments. The Company shall not be liable under this Agreement to make any payment in connection with any Claim made against Indemnitee to the extent Indemnitee has otherwise actually received payment (under any insurance policy, provision of the Company's Articles of Incorporation, Bylaws or otherwise) of the amounts otherwise payable hereunder.

7. Partial Indemnification. If Indemnitee is entitled under any provision of this Agreement to indemnification by the Company for some or a portion of Expenses incurred in connection with any Claim, but not, however, for all of the total amount thereof, the Company shall nevertheless indemnify Indemnitee for the portion of such Expenses to which Indemnitee is entitled.

-7-

8. Mutual Acknowledgment. Both the Company and Indemnitee acknowledge that in certain instances, federal law or applicable public policy may prohibit the Company from indemnifying its directors, officers, employees, agents or fiduciaries under this Agreement or otherwise. Indemnitee understands and acknowledges that the Company has undertaken or may be required in the future to undertake with the Securities and Exchange Commission to submit the question of indemnification to a court in certain circumstances for a determination of the Company's right under public policy to indemnify Indemnitee.

9. Liability Insurance. To the extent the Company maintains liability insurance applicable to directors, officers, employees, agents or fiduciaries, Indemnitee shall be covered by such policies in such a manner as to provide Indemnitee the same rights and benefits as are provided to the most favorably insured of the Company's directors, if Indemnitee is a director; or of the Company's officers, if Indemnitee is not a director of the Company but is an officer; or of the Company's key employees, agents or fiduciaries, if Indemnitee is not an officer or director but is a key employee, agent or fiduciary.

10. Exceptions. Notwithstanding any other provision of this Agreement, the Company shall not be obligated pursuant to the terms of this Agreement:

a. Excluded Action or Omissions. To indemnify or make Expense Advances to Indemnitee with respect to Claims arising out of acts, omissions or transactions for which Indemnitee is prohibited from receiving indemnification under applicable law.

b. Claims Initiated by Indemnitee. To indemnify or make Expense Advances to Indemnitee with respect to Claims initiated or brought voluntarily by Indemnitee and not by way of defense, counterclaim or cross-claim, except (i) with respect to actions or proceedings brought to establish or enforce a right to indemnification under this Agreement or any other agreement or insurance policy or under the Company's Articles of Incorporation or Bylaws now or hereafter in effect relating to Claims for Covered Events, (ii) in specific cases if the Board of Directors has approved the initiation or bringing of such Claim, or (iii) as otherwise required under Section 145 of the California General Corporation Law, regardless of whether Indemnitee ultimately is determined to be entitled to such indemnification, Expense Advances, or insurance recovery, as the case may be.

c. Lack of Good Faith. To indemnify Indemnitee for any Expenses incurred by the Indemnitee with respect to any action instituted (i) by Indemnitee to enforce or interpret this Agreement, if a court having jurisdiction over such action determines as provided in Section 13 that each of the material assertions made by the Indemnitee as a basis for such action was not made in good faith or was frivolous, or (ii) by or in the name of the Company to enforce or interpret this Agreement, if a court having jurisdiction over such action determines as provided in Section 13 that each of the material defenses asserted by Indemnitee in such action was made in bad faith or was frivolous.

d. Claims Under Section 16(b). To indemnify Indemnitee for Expenses and the payment of profits arising from the purchase and sale by Indemnitee of securities in violation of Section 16(b) of the Securities Exchange Act of 1934, as amended, or any similar successor statute.

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11. Counterparts. This Agreement may be executed in one or more counterparts, each of which shall constitute an original.

12. Binding Effect; Successors and Assigns. This Agreement shall be binding upon and inure to the benefit of and be enforceable by the parties hereto and their respective successors, assigns (including any direct or indirect successor by purchase, merger, consolidation or otherwise to all or substantially all of the business or assets of the Company), spouses, heirs and personal and legal representatives. The Company shall require and cause any successor (whether direct or indirect, and whether by purchase, merger, consolidation or otherwise) to all, substantially all, or a substantial part, of the business or assets of the Company, by written agreement in form and substance satisfactory to Indemnitee, expressly to assume and agree to perform this Agreement in the same manner and to the same extent that the Company would be required to perform if no such succession had taken place. This Agreement shall continue in effect regardless of whether Indemnitee continues to serve as a director, officer, employee, agent or fiduciary (as applicable) of the Company or of any other enterprise at the Company's request.

13. Expenses Incurred in Action Relating to Enforcement or
Interpretation. In the event that any action is instituted by Indemnitee under this Agreement or under any liability insurance policies maintained by the Company to enforce or interpret any of the terms hereof or thereof, Indemnitee shall be entitled to be indemnified for all Expenses incurred by Indemnitee with respect to such action (including without limitation attorneys' fees), regardless of whether Indemnitee is ultimately successful in such action, unless as a part of such action a court having jurisdiction over such action makes a final judicial determination (as to which all rights of appeal therefrom have been exhausted or lapsed) that each of the material assertions made by Indemnitee as a basis for such action was not made in good faith or was frivolous; provided, however, that until such final judicial determination is made, Indemnitee shall be entitled under Section 3 to receive payment of Expense Advances hereunder with respect to such action. In the event of an action instituted by or in the name of the Company under this Agreement to enforce or interpret any of the terms of this Agreement, Indemnitee shall be entitled to be indemnified for all Expenses incurred by Indemnitee in defense of such action (including without limitation costs and expenses incurred with respect to Indemnitee's counterclaims and cross-claims made in such action), unless as a part of such action a court having jurisdiction over such action makes a final judicial determination (as to which all rights of appeal therefrom have been exhausted or lapsed) that each of the material defenses asserted by Indemnitee in such action was made in bad faith or was frivolous; provided, however, that until such final judicial determination is made, Indemnitee shall be entitled under Section 3 to receive payment of Expense Advances hereunder with respect to such action.

14. Period of Limitations. No legal action shall be brought and no cause of action shall be asserted by or in the right of the Company against Indemnitee, Indemnitee's estate, spouse, heirs, executors or personal or legal representatives after the expiration of two years from the date of accrual of such cause of action, and any claim or cause of action of the Company shall be extinguished and deemed released unless asserted by the timely filing of a legal action within such two year period; provided, however, that if any shorter period of limitations is otherwise applicable to any such cause of action, such shorter period shall govern.

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15. Notice. All notices, requests, demands and other communications under this Agreement shall be in writing and shall be deemed duly given (i) if delivered by hand and signed for by the party addressed, on the date of such delivery, or (ii) if mailed by domestic certified or registered mail with postage prepaid, on the third business day after the date postmarked. Addresses for notice to either party are as shown on the signature page of this Agreement, or as subsequently modified by written notice.

16. Consent to Jurisdiction. The Company and Indemnitee each hereby irrevocably consent to the jurisdiction of the courts of the State of Delaware for all purposes in connection with any action or proceeding which arises out of or relates to this Agreement and agree that any action instituted under this Agreement shall be commenced, prosecuted and continued only in the state courts of the State of Delaware, which shall be the exclusive and only proper forum for adjudicating such a claim.

17. Severability. The provisions of this Agreement shall be severable in the event that any of the provisions hereof (including any provision within a single section, paragraph or sentence) are held by a court of competent jurisdiction to be invalid, void or otherwise unenforceable, and the remaining provisions shall remain enforceable to the fullest extent permitted by law. Furthermore, to the fullest extent possible, the provisions of this Agreement (including without limitation each portion of this Agreement containing any provision held to be invalid, void or otherwise unenforceable, that is not itself invalid, void or unenforceable) shall be construed so as to give effect to the intent manifested by the provision held invalid, illegal or unenforceable.

18. Choice of Law. This Agreement, and all rights, remedies, liabilities, powers and duties of the parties to this Agreement, shall be governed by and construed in accordance with the laws of the State of Delaware as applied to contracts between Delaware residents entered into and to be performed entirely in the State of Delaware without regard to principles of conflicts of laws.

19. Subrogation. In the event of payment under this Agreement, the Company shall be subrogated to the extent of such payment to all of the rights of recovery of Indemnitee, who shall execute all documents required and shall do all acts that may be necessary to secure such rights and to enable the Company effectively to bring suit to enforce such rights.

20. Amendment and Termination. No amendment, modification, termination or cancellation of this Agreement shall be effective unless it is in writing signed by both the parties hereto. No waiver of any of the provisions of this Agreement shall be deemed to be or shall constitute a waiver of any other provisions hereof (whether or not similar), nor shall such waiver constitute a continuing waiver.

21. Integration and Entire Agreement. This Agreement sets forth the entire understanding between the parties hereto and supersedes and merges all previous written and oral negotiations, commitments, understandings and agreements relating to the subject matter hereof between the parties hereto.

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22. No Construction as Employment Agreement. Nothing contained in this Agreement shall be construed as giving Indemnitee any right to be retained in the employ of the Company or any of its subsidiaries or affiliated entities.

[Remainder of Page Intentionally Left Blank]

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IN WITNESS WHEREOF, the parties hereto have executed this Indemnification Agreement as of the date first above written.

NATUS MEDICAL INCORPORATED

By: ______________________________

Name: ____________________________

Title: ___________________________

Address: 1501 Industrial Road
San Carlos, CA 94070

AGREED TO AND ACCEPTED
INDEMNITEE:


(signature)


Name


Address

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EXHIBIT 10.2

NATUS MEDICAL INCORPORATED
1991 STOCK PLAN

Amended through July 18, 2000

1. Purposes of the Plan. The purposes of this Stock Plan are to attract and retain the best available personnel for positions of substantial responsibility, to provide additional incentive to Employees and Consultants of the Company and its Subsidiaries and to promote the success of the Company's business. Options granted under the Plan may be incentive stock options (as defined under Section 422A of the Code) or nonstatutory stock options, as determined by the Administrator at the time of grant of an option and subject to the applicable provisions of Section 422A of the Code, as amended, and the regulations promulgated thereunder.

2. Definitions. As used herein, the following definitions shall apply:

(a) "Administrator" means the Board or any of its Committees as shall be administering the Plan, in accordance with Section 4 of the Plan.

(b) "Board" means the Board of Directors of the Company.

(c) "Code" means the Internal Revenue Code of 1986, as amended from

time to time, and any successor thereto.

(d) "Committee" means any Committee, if any, appointed by the Board in accordance with paragraph (a) of Section 4 of the Plan.

(e) "Common Stock" means the Common Stock of the Company.

(f) "Company" means Natus Medical Incorporated, a California corporation.

(g) "Consultant" means any person, including an advisor, who is engaged by the Company or any Parent or Subsidiary to render services and is compensated for such services, and any director of the Company whether compensated for such services or not provided that if and in the event the Company registers any class of any equity security pursuant to the Exchange Act, the term Consultant shall thereafter not include directors who are not compensated for their services or are paid only a director's fee by the Company.

(h) "Continuous Status as an Employee or Consultant" means the absence of any interruption or termination of the employment or consulting relationship with the Company or any Subsidiary. Continuous Status as an Employee or Consultant shall not be considered interrupted in the case of: (i) sick leave; (ii) military leave; (iii) any other leave of absence approved by the Board, provided that such leave is for a period of not more than ninety (90) days, unless reemployment upon the expiration of such leave is guaranteed by contract or statute, or unless provided otherwise pursuant to Company policy adopted from time to time; or (iv) in the case of transfers between locations of the Company or between the Company, its Subsidiaries or its successor.

(i) "Disability" means total and permanent disability, as defined in Section 22(e)(3) of the Code.

(j) "Employee" means any person, including officers and directors, employed by the Company or any Parent or Subsidiary of the Company. The payment of directors' fees by the Company shall not be sufficient to constitute "employment" by the Company.

(k) "Exchange Act" means the Securities Exchange Act of 1934, as amended.

(l) "Fair Market Value" means, as of any date, the value of Common Stock determined as follows:

(i) If the Common Stock is listed on any established stock exchange or a national market system, including without limitation the National Market System of the National Association of Securities Dealers, Inc. Automated Quotation ("NASDAQ") System, the Fair Market Value of a Share of Common Stock shall be the closing sales price for such stock (or the closing bid, if no sales were reported) as quoted on such system or exchange (or the exchange with the greatest volume of trading in Common Stock) on the last market trading day prior to the day of determination, as reported in the Wall Street Journal or such other source as the Administrator deems reliable;

(ii) If the Common Stock is quoted on the NASDAQ System (but not on the National Market System thereof) or regularly quoted by a recognized securities dealer but selling prices are not reported, the Fair Market Value of a Share of Common Stock shall be the mean between the high and low asked prices for the Common Stock or on the last market trading day prior to the day of determination, as reported in the Wall Street Journal or such other source as the Administrator deems reliable;

(iii) In the absence of an established market for the Common Stock, the Fair Market Value thereof shall be determined in good faith by the Administrator.

(m) "Incentive Stock Option" means an Option that satisfies the provisions of Section 422A of the Code.

(n) "Nonstatutory Stock Option" means an Option that is not an Incentive Stock Option.

(o) "Option" means an Option granted pursuant to the Plan.

(p) "Optioned Stock" means the Common Stock subject to an Option.

(q) "Optionee" means an Employee or Consultant who receives an Option or Stock Purchase Right.

(r) "Parent" corporation shall have the meaning defined in Section 425(e) of the Code.

(s) "Plan" means this 1991 Stock Plan.

(t) "Restricted Stock" means shares of Common Stock acquired pursuant to a grant of Stock Purchase Rights under Section 10 below.

(u) "Share" means the Common Stock, as adjusted in accordance with Section 13 of the Plan.

(v) "Stock Purchase Right" means the right to purchase Common Stock pursuant to Section 10.

(w) "Subsidiary" corporation shall have the meaning defined in Section 425(f) of the Code.

In addition, the terms "Rule 16b-3" and "Applicable Laws," the term "Insiders," and the term "Tax Date," shall have the meanings set forth, respectively, in Sections 4, 9, and 11 below.

3. Stock Subject to the Plan. Subject to the provisions of Section 13 of the Plan, the total number of Shares reserved and available for distribution pursuant to awards made under the Plan shall be 2,393,482 (post two-for-five reverse split). The Shares may be authorized, but unissued or reacquired Common Stock.

If an Option should expire or become unexercisable for any reason without having been exercised in full, or in the case of a Stock Purchase Right, if shares of common Stock are repurchased by the Company, the unpurchased or repurchased Shares which were subject thereto shall, unless the Plan shall have been terminated, become available for future grant or sale under the Plan. Notwithstanding the foregoing, however, if Shares are issued upon exercise of an Option and later repurchased by the Company, such Shares shall not become available for future grant or sale under the Plan.

4. Administration of the Plan.

(a) Procedure.

(i) Administration With Respect to Directors and Officers. With respect to grants of Options or Stock Purchase Rights to Employees who are also officers or directors of the Company, the Plan shall be administered by (A) the Board if the Board may administer the Plan in compliance with Rule 16b-3 promulgated under the Exchange Act or any successor rule ("Rule 16b-3") with respect to a plan intended to qualify thereunder as a discretionary plan, or (B) a Committee designated by the Board to administer the Plan, which Committee shall be constituted in such a manner as to permit the Plan to comply with Rule 16b-3 with respect to a plan intended to qualify thereunder as a discretionary plan. Once appointed, such Committee shall continue to serve in its designated capacity until otherwise directed by the Board. From time to time the Board may increase the size of the Committee and appoint additional members thereof, remove members (with or without cause) and appoint new members in substitution therefor, fill vacancies, however caused, and remove all members of the Committee and thereafter directly administer the Plan, all to the

extent permitted by Rule 16b-3 with respect to a plan intended to qualify thereunder as a discretionary plan.

(ii) Administration With Respect to Consultants and Other Employees. With respect to grants of Options or Stock Purchase Rights to Employees or Consultants who are neither directors nor officers of the Company, the Plan shall be administered by (A) the Board or (B) a Committee designated by the Board, which Committee shall be constituted in such a manner as to satisfy the legal requirements relating to the administration of incentive stock option plans, if any, of California corporate and securities laws and of the Code (the "Applicable Laws"). Once appointed, such Committee shall continue to serve in its designated capacity until otherwise directed by the Board. From time to time the Board may increase the size of the Committee and appoint additional members thereof, remove members (with or without cause) and appoint new members in substitution therefor, fill vacancies, however caused, and remove all members of the Committee and thereafter directly administer the Plan, all to the extent permitted by the Applicable Laws.

(iii) Multiple Administrative Bodies. If permitted by Rule 16b-3, the Plan may be administered by different bodies with respect to directors, non-director officers and Employees who are neither directors nor officers and Consultants who are not directors.

(b) Powers of the Administrator. Subject to the provisions of the Plan and in the case of a Committee, the specific duties delegated by the Board to such Committee, the Administrator shall have the authority, in its discretion:

(i) to determine the Fair Market Value of the Common Stock, in accordance with Section 2(l) of the Plan;

(ii) to select the officers, Consultants and Employees to whom Options and Stock Purchase Rights may from time to time be granted hereunder;

(iii) to determine whether and to what extent Options and Stock Purchase Rights or any combination thereof, are granted hereunder;

(iv) to determine the number of shares of Common Stock to be covered by each such award granted hereunder;

(v) to approve forms of agreement for use under the Plan;

(vi) to determine the terms and conditions, not inconsistent with the terms of the Plan, of any award granted hereunder (including, but not limited to, the share price and any restriction or limitation or waiver of forfeiture restrictions regarding any Option, Stock Purchase Right or other award and/or the shares of Common Stock relating thereto, based in each case on such factors as the Administrator shall determine, in its sole discretion);

(vii) to determine whether and under what circumstances an Option may be settled in cash under subSection 9(f) instead of Common Stock;


(viii) to reduce the exercise price of any Option to the then current Fair Market Value if the Fair Market Value of the Common Stock covered by such Option shall have declined since the date the Option was granted; and

(ix) to determine the terms and restrictions applicable to Options and Stock Purchase Rights and any Restricted Stock acquired pursuant to Stock Purchase Rights.

(c) Effect of Committee's Decision. All decisions, determinations and interpretations of the Administrator shall be final and binding.

5. Eligibility.

(a) Nonstatutory Stock Options and Stock Purchase Rights may be granted only to Employees and Consultants. Incentive Stock Options may be granted only to Employees. An Employee or Consultant who has been granted an Option or Stock Purchase Right may, if he or she is otherwise eligible, be granted additional Options or Stock Purchase Rights.

(b) Each Option shall be evidenced by a written Option agreement, which shall expressly identify the Options as Incentive Stock Options or as Nonstatutory Stock Options, and which shall be in such form and contain such provisions as the Administrator shall from time to time deem appropriate. However, notwithstanding such designations, to the extent that the aggregate Fair Market Value of the Shares with respect to which Options designated as Incentive Stock Options are exercisable for the first time by any Optionee during any calendar year (under all plans of the Company or any Parent or Subsidiary) exceeds $100,000, such excess Options shall be treated as Nonstatutory Stock Options.

(c) For purposes of Section 5(b), Incentive Stock Options shall be taken into account in the order in which they were granted, and the Fair Market Value of the Shares shall be determined as of the time the Option with respect to such Shares is granted.

(d) Neither the Plan nor any Option or Stock Purchase Right agreement shall confer upon any Optionee any right with respect to continuation of employment or consulting relationship with the Company, nor shall it interfere in any way with the Optionee's right or the Company's right to terminate the Optionee's employment or consulting relationship at any time, with or without cause.

6. Term of Plan. Subject to Section 19 of this Plan, the Plan shall become effective upon the earlier to occur of its adoption by the Board or its approval by the shareholders of the Company as described in Section 19. It shall continue in effect for a term of ten (10) years unless sooner terminated under
Section 15 of this Plan.

7. Term of Option. The term of each Option shall be the term stated in the Option Agreement; provided, however, that in the case of an Incentive Stock Option, the term shall be no more than ten (10) years from the date of grant thereof or such shorter term as may be provided in the Option Agreement. However, in the case of an Option granted to an Optionee who, at the time the Option is granted, owns stock representing more than ten percent (10%) of the voting power of all classes of stock of the Company or any Parent or Subsidiary, the term of the Option shall be five

(5) years from the date of grant thereof or such shorter term as may be provided in the Option Agreement.

8. Option Exercise Price and Consideration.

(a) The per Share exercise price for the Shares issuable pursuant to an Option shall be such price as is determined by the Administrator, but shall be subject to the following:

(i) In the case of an Incentive Stock Option

(A) granted to an Employee who, at the time of the grant of such Incentive Stock Option, owns stock representing more than ten percent (10%) of the voting power or value of all classes of stock of the Company or any Parent or Subsidiary, the per Share exercise price shall be no less than 110% of the Fair Market Value per Share on the date of grant.

(B) granted to any Employee, the per Share exercise price shall be no less than 100% of the Fair Market Value per Share on the date of grant.

(ii) In the case of a Nonstatutory Stock Option

(A) granted to a person who, at the time of the grant of such Option, owns stock representing more than ten percent (10%) of the voting power or value of all classes of stock of the Company or any Parent or Subsidiary, the per Share exercise price shall be no less than 110% of the Fair Market Value per Share on the date of the grant.

(B) granted to any person, the per Share exercise price shall be no less than 100% of the Fair Market Value per Share on the date of grant.

(b) The consideration to be paid for the Shares to be issued upon exercise of an Option, including the method of payment, shall be determined by the Administrator (and, in the case of an Incentive Stock Option, shall be determined at the time of grant) and may consist entirely of (1) cash, (2) check, (3) promissory note, (4) other Shares which (x) in the case of Shares acquired upon exercise of an Option either have been owned by the Optionee for more than six months on the date of surrender or were not acquired, directly or indirectly, from the Company, and (y) have a Fair Market Value on the date of surrender equal to the aggregate exercise price of the Shares as to which said Option shall be exercised, (5) authorization from the Company to retain from the total number of Shares as to which the Option is exercised that number of Shares having a Fair Market Value on the date of exercise equal to the exercise price for the total number of Shares as to which the Option is exercised, (6) delivery of a properly executed exercise notice together with irrevocable instructions to a broker to promptly deliver to the Company the amount of sale or loan proceeds required to pay the exercise price, (7) by delivering an irrevocable subscription agreement for the Shares which irrevocably obligates the option holder to take and pay for the Shares not more than twelve months after the date of delivery of the subscription agreement, (8) any combination of the foregoing methods of payment, or (9) such other consideration and method of payment for the issuance of Shares to the extent permitted under Applicable Laws. In making its determination as to the type of consideration to accept, the Board shall consider if acceptance of such consideration may be reasonably expected to benefit the Company (Section 315(b) of the California Corporation Law).


9. Exercise of Option.

(a) Procedure for Exercise; Rights as a Shareholder. Any Option granted hereunder shall be exercisable at such times and under such conditions as determined by the Administrator and as shall be permissible under the terms of the Plan.

An Option may not be exercised for a fraction of a Share.

An Option shall be deemed to be exercised when written notice of such exercise has been given to the Company in accordance with the terms of the Option by the person entitled to exercise the Option and full payment for the Shares with respect to which the Option is exercised has been received by the Company. Full payment may, as authorized by the Administrator (and, in the case of an Incentive Stock Option, determined at the time of grant) and permitted by the Option Agreement consist of any consideration and method of payment allowable under subSection 8(b) of the Plan. Until the issuance (as evidenced by the appropriate entry on the books of the Company or of a duly authorized transfer agent of the Company) of the stock certificate evidencing such Shares, no right to vote or receive dividends or any other rights as a shareholder shall exist with respect to the Optioned Stock, notwithstanding the exercise of the Option. No adjustment will be made for a dividend or other right for which the record date is prior to the date the stock certificate is issued, except as provided in Section 13 of the Plan.

Exercise of an Option in any manner shall result in a decrease in the number of Shares which thereafter shall be available, both for purposes of the Plan and for sale under the Option, by the number of Shares as to which the Option is exercised.

(b) Rule 16b-3. Options granted to persons who are subject to Section 16 of the Exchange Act ("Insiders") must comply with the applicable provisions of Rule 16b-3 and shall contain such additional conditions or restrictions as may be required thereunder to qualify for the maximum exemption from Section 16 of the Exchange Act with respect to Plan transactions.

(c) Termination of Employment. Upon termination of an Optionee's Continuous Status as an Employee or Consultant (other than upon the Optionee's death), the Optionee may, but only within thirty (30) days (or such other period of time not exceeding six (6) months (three (3) months in the case of an Incentive Stock Option) as is determined by the Administrator at the time of grant) after the date of such termination, exercise his or her Option to the extent that it was exercisable at the date of such termination.

(d) Disability of Optionee. In the event of termination of an Optionee's Continuous Status as an Employee or Consultant as a result of the Optionee's Disability, the Optionee may, but only within six (6) months from the date of such termination (but in no event later than the expiration of the term of such Option as set forth in the Option Agreement), exercise the Option to the extent that the Optionee was entitled to exercise it at the date of such termination.

(e) Death of Optionee. In the event of an Optionee's death, the Option may be exercised at any time within six (6) months following the date of death by the Optionee's estate or by a person who acquired the right to exercise the Option by bequest or inheritance, but only to the

extent of the right to exercise that had accrued at the date of the Optionee's death (but in no event later than the expiration of the term of such Option as set forth in the Option Agreement).

(f) Buyout Provisions. The Administrator may at any time offer to buy out for a payment in cash or Shares, an Option previously granted, based on such terms and conditions as the Administrator shall establish and communicate to the Optionee at the time that such offer is made.

10. Stock Purchase Rights.

(a) Rights to Purchase. Stock Purchase Rights may be issued either alone, in addition to, or in tandem with outer awards granted under the Plan and/or cash awards made outside of the Plan. After Administrator determines that it will offer Stock Purchase Rights under the Plan, it shall advise the offeree in writing of the terms, conditions and restrictions related to the offer, including the number of Shares that such person shall be entitled to purchase, the price to be paid (which price shall not be less than 100% of the Fair Market Value of the Shares as of the date of the offer), and the time within which such person must accept such offer, which shall in no event exceed thirty (30) days from the date upon which the Administrator made the determination to grant the Stock Purchase Right. The offer shall be accepted by execution of a Restricted Stock purchase agreement in the form determined by the Administrator. Shares purchased pursuant to the grant of Stock Purchase Right shall be referred to herein as "Restricted Stock."

(b) Repurchase Option. Unless the Administrator determines otherwise, the Restricted Stock purchase agreement shall grant the Company a repurchase option exercisable upon the voluntary or involuntary termination of the purchaser's employment with the Company for any reason (including death or Disability). The purchase price for Shares repurchased pursuant to the Restricted Stock purchase agreement shall be the original price paid by the purchaser and may be paid by cancellation of any indebtedness of the purchaser to the Company. The repurchase option shall lapse at such rate as the Administrator may determine.

(c) Other Provisions. The Restricted Stock purchase agreement shall contain such other terms, provisions and conditions not inconsistent with the Plan as may be determined by the Administrator in its sole discretion. In addition, the provisions of Restricted Stock purchase agreements need not be the same with respect to each purchaser.

(d) Section 16 Restrictions. Stock Purchase Rights granted to Insiders, and Shares purchased by Insiders in connection with Stock Purchase Rights, shall be subject to any restrictions applicable thereto in compliance with Rule 16-3. An Insider may only purchase Shares pursuant to the grant of a Stock Purchase Right, and may only sell Shares purchased pursuant to the grant of a Stock Purchase Right, during such time or times as are permitted by Rule 16b-3.

(e) Rights as a Shareholder. Once the Stock Purchase Right is exercised, the purchaser shall have the rights equivalent to those of a shareholder, and shall be a shareholder when his or her purchase is entered upon the records of the duly authorized transfer agent of the Company. No adjustment will be made for a dividend or other right for which the record date is prior to the date the Stock Purchase Right is exercised, except as provided in Section 13 of the Plan.

11. Stock Withholding to Satisfy Withholding Tax Obligations. At the discretion of the Administrator, Optionees may satisfy withholding obligations as provided in this Section 11. When an Optionee incurs tax liability in connection with the an Option or Stock Purchase Right, which tax liability is subject to tax withholding under applicable tax laws, and the Optionee is obligated to pay the Company an amount required to be withheld under applicable tax laws, the Optionee may satisfy the withholding tax obligation by electing to have the Company withhold from the Shares to be issued upon exercise of the Option, or the Shares to be issued in connection with the Stock Purchase Right, if any, that number of Shares having a Fair Market Value equal to the amount required to be withheld. The Fair Market Value of the Shares to be withheld shall be determined on the date that the amount of tax to be withheld is to be determined (the "Tax Date").

All elections by an Optionee to have Shares withheld for this purpose shall be made in writing in a form acceptable to the Administrator and shall be subject to the following restrictions:

(a) the election must be made on or prior to the applicable Tax Date;

(b) once made, the election shall be irrevocable as to the particular Shares of the Option or Stock Purchase Right as to which the election is made;

(c) all elections shall be subject to the consent or disapproval of the Administrator;

(d) if the Optionee is an Insider, the election must comply with the applicable provisions of Rule 16b-3 and shall be subject to such additional conditions or restrictions as may be required thereunder to qualify for the maximum exemption from Section 16 of the Exchange Act with respect to Plan transactions.

In the event the election to have Shares withheld is made by an Optionee and the Tax Date is deferred under Section 83 of the Code because no election is filed under Section 83(b) of the Code, the Optionee shall receive the full number of Shares with respect to which the Option or Stock Purchase Right is exercised but such Optionee shall be unconditionally obligated to tender back to the Company the proper number of Shares on the Tax Date.

12. Non-Transferability of Options and Stock Purchase Rights. Options and Stock Purchase Rights may not be sold, pledged, assigned, hypothecated, transferred or disposed of in any manner other than by will or by the laws of descent or distribution and may be exercised, during the lifetime of the Optionee, only by the Optionee.

13. Adjustments Upon Changes in Capitalization or Merger.

(a) Subject to any required action by the shareholders of the Company, the number of Shares covered by each outstanding Option and Stock Purchase Right, and the number of Shares which have been authorized for issuance under the Plan but as to which no Options or Stock Purchase Rights have yet been granted or which have been returned to the Plan upon cancellation or expiration of an Option or Stock Purchase Right, as well as the price per Share covered by each such outstanding Option or Stock Purchase Right, shall be proportionately adjusted for any increase or decrease in the number of issued Shares resulting from a stock split, reverse stock split, stock


dividend, combination or reclassification of the Common Stock, or any other increase or decrease in the aggregate number of issued Shares effected without receipt of consideration by the Company; provided, however, that conversion of any convertible securities of the Company shall not be deemed to have been "effected without receipt of consideration." Such adjustment shall be made by the Board, whose determination in that respect shall be final, binding and conclusive. Except as expressly provided herein, no issuance by the Company of Shares of stock of any class, or securities convertible into Shares of stock of any class, shall affect, and no adjustment by reason thereof shall be made with respect to, the number or price of Shares subject to an Option or Stock Purchase Right.

(b) In the event of the proposed dissolution or liquidation of the Company, the Board shall notify the Optionee at least fifteen (15) days prior to such proposed action. To the extent it has not been previously exercised, the Option or Stock Purchase Right will terminate immediately prior to the consummation of such proposed action.

(c) In the event of a merger of the Company with or into another corporation or the sale of all or substantially all of the assets of the Company pursuant to which the shareholders of the Company prior to such transaction hold less than 50% of the outstanding capital stock of the surviving corporation immediately after the closing of such transaction (a "Change in Control Transaction") within four years after the date the Securities and Exchange Commission declares effective a registration statement filed by the Company for the initial public offering of the Company's Common Stock pursuant to the Securities Act (the "IPO Effective Time"), outstanding Options may be assumed or equivalent options may be substituted by the successor corporation or a Parent or Subsidiary thereof (the "Successor Corporation"). Following such assumption or substitution, if the Optionee's status as an employee of the Company or employee of the Successor Corporation, as applicable, is terminated within 12 months of the Change in Control Transaction other than upon a voluntary resignation by the Optionee or the termination of Optionee for cause, the Option or option shall become fully exercisable, including as to Shares for which it would not otherwise be exercisable. Thereafter, the Option or option shall remain exercisable in accordance with Sections 9(c) through (e) above. If the Successor Corporation does not assume an outstanding Option or substitute for it an equivalent option, the Option shall become fully vested and exercisable, including as to Shares for which it would not otherwise be exercisable. In such event the Board shall notify the Optionee that the Option shall be fully exercisable for a period of fifteen (15) days from the date of such notice, and upon the expiration of such period, the Option shall terminate.

In the event of a Change in Control Transaction after four years after the IPO Effective Time, outstanding Options may be assumed or equivalent options may be substituted by the Successor Corporation at the Administrator's discretion. The Administrator also shall have the discretion to terminate the Plan and permit the Optionee to exercise the Option to the extent already vested and the discretion to make a determination to accelerate vesting of any portion of or all of the outstanding Options. The Administrator may provide at the Administrator's discretion that following an assumption or substitution, if the Optionee's status as an employee of the Company or employee of the Successor Corporation, as applicable, is terminated within 12 months of the Change in Control Transaction other than upon a voluntary resignation by the Optionee or the termination of Optionee for cause, the Option or option shall become fully exercisable, including as to Shares for which it would not otherwise be exercisable. Thereafter, the Option or option shall remain exercisable in accordance with Sections 9(b) through (d) above. In such event the Board shall notify the Optionee


that the Option shall be fully exercisable for a period of fifteen (15) days from the date of such notice, and upon the expiration of such period the Option shall terminate.

Notwithstanding the foregoing, until such time as the Company is no longer subject to Section 2115 of the California Corporations Code, in the event of a Change in Control Transaction, each outstanding Option shall be assumed or an equivalent option or right substituted by the Successor Corporation. In the event that the Successor Corporation refuses to assume or substitute for the Option, the Option shall terminate upon the closing of the merger or sale of assets.

In the event of the merger of the Company with or into another corporation or the sale of substantially all of the assets of the Company in a transaction that is not a Change in Control Transaction, each outstanding option shall be assumed or an equivalent option shall be substituted by the Successor Corporation. In the event the Successor Corporation refuses to assume or substitute for the Option, each outstanding Option shall terminate upon the closing of such merger or sale of assets.

For the purposes of this Section 13(c), an Option shall be considered assumed if, following the merger or sale of assets, the Option confers the right to purchase or receive, for each Share of Optioned Stock subject to the Option immediately prior to the merger or sale of assets, the consideration (whether stock, cash, or other securities or property) received in the merger or sale of assets by holders of Common Stock for each Share held on the effective date of the transaction (and if holders were offered a choice of consideration, the type of consideration chosen by the holders of a majority of the outstanding Shares). If such consideration received in the merger or sale of assets is not solely common stock of the successor corporation or its Parent, the Administrator may, with the consent of the successor corporation, provide for the consideration to be received upon the exercise of the Option, for each Share of Optioned Stock subject to the Option, to be solely common stock of the successor corporation or its Parent equal in fair market value to the per share consideration received by holders of Common Stock in the merger or sale of assets.

14. Time of Granting Options and Stock Purchase Rights. The date of grant of an Option or Stock Purchase Right shall, for all purposes, be the date on which the Administrator makes the determination granting such Option or Stock Purchase Right. Notice of the determination shall be given to each Employee or Consultant to whom an Option is so granted within a reasonable time after the date of such grant.

15. Amendment and Termination of the Plan.

(a) Amendment and Termination. The Board may at any time amend, alter, suspend, or discontinue the Plan, but no amendment, alteration, suspension, or discontinuation shall be made which would impair the rights of any Optionee under any grant theretofore made, without his or her consent. In addition, to the extent necessary and desirable to comply with Rule 16b-3 under the Exchange Act or under Section 422A of the Code (or any other applicable law or regulation), the Company shall obtain shareholder approval of any Plan amendment in such a manner and to such a degree as required.

(b) Effect of Amendment or Termination. Any such amendment or termination of the Plan shall not affect Options or Stock Purchase Rights already granted and such Options and Stock Purchase Rights shall remain in full force and effect as if this Plan had not been amended or terminated.

16. Conditions Upon Issuance of Shares. Shares shall not be issued with respect to an Option or Stock Purchase Right unless the exercise of such Option or Stock Purchase Right and the issuance and delivery of such Shares pursuant thereto shall comply with all relevant provisions of law, including, without limitation, the Securities Act of 1933, as amended, the Exchange Act, the rules and regulations promulgated thereunder, and the requirements of any stock exchange upon which the Shares may then be listed, and shall be further subject to the approval of counsel for the Company with respect to such compliance.

As a condition to the exercise of an Option or the issuance of Shares on exercise of an Option or Stock Purchase Right, the Company may require the person exercising such Option or Stock Purchase Right to represent and warrant at the time of any such exercise that the Shares are being purchased only for investment and without any present intention to sell or distribute such Shares if, in the opinion of counsel for the Company, such a representation is required by any of the aforementioned relevant provisions of law.

17. Reservation of Shares. The Company, during the term of this Plan, will at all times reserve and keep available such number of Shares as shall be sufficient to satisfy the requirements of the Plan.

Inability of the Company to obtain authority from any regulatory body having jurisdiction, which authority is deemed by the Company's counsel to be necessary to the lawful issuance and sale of any Shares hereunder, shall relieve the Company of any liability in respect of the non-issuance or sale of such Shares as to which such requisite authority shall not have been obtained.

18. Agreements. Options shall be evidenced by written agreements in such form as the Board shall approve from time to time.

19. Shareholder Approval. Continuance of the Plan shall be subject to approval by the shareholders of the Company within twelve (12) months before or after the date the Plan is adopted as provided in Section 6. Such shareholder approval shall be obtained in the degree and manner required under applicable state and federal law.

20. Information to Optionees. The Company shall provide to each Optionee, during the period for which such Optionee has one or more Options outstanding, copies of all annual reports and other information which are provided to all shareholders of the Company. The Company shall not be required to provide such information to key employees whose duties in connection with the Company assure

their access to equivalent information.


EXHIBIT 10.2.1

NATUS MEDICAL INCORPORATED

NOTICE OF STOCK OPTION GRANT

[Name]
[Address_1]
[Address_2]

You have been granted an option to purchase Common Stock of Natus Medical Incorporated (the "Company") under the terms of the Natus Medical Incorporated 1991 Stock Plan as follows:

Grant Number:
                                   ______________________________
Date of Grant:

Option Price Per Share:

Total Number of Shares Granted:    [Total_Shares_Granted]

Total Price of Shares Granted:     $[Total_Price]

Type of Option:                           Incentive Stock Option
                                   -----
                                          Nonstatutory Stock Option
                                   _____
Term/Expiration Date:

Vesting Schedule:                  This Option shall be exercisable
                                   cumulatively, to the extent of 1/48th of the
                                   Total Number of Shares Granted for each month
                                   of your Continuous Status as an Employee or
                                   Consultant which has expired after
                                   [Vesting_Start_Date]     (the vesting
                                   commencement date).

Termination Period:                Option may be exercised for 30 days after
                                   termination of employment or consulting
                                   relationship (but in no event later than the
                                   Expiration Date).

By your signature and the signature of the Company's representative below, you and the Company agree that this option is granted under and governed by the terms and conditions of the 1991 Stock Plan and the Stock Option Agreement, all of which are attached and made a part of this document.

OPTIONEE:                               NATUS MEDICAL INCORPORATED



_________________________________       ________________________________________
Signature                               By:  Tim C. Johnson, President

[Name]
---------------------------------
Print Name


NATUS MEDICAL INCORPORATED

STOCK OPTION AGREEMENT

1. Grant of Option. The Plan Administrator of Natus Medical Incorporated, a California corporation (the "Company"), hereby grants to the Optionee named in the Notice of Grant (the "Optionee"), an option (the "Option") to purchase a total number of shares of Common Stock (the "Shares") set forth in the Notice of Grant, at the exercise price per share set forth in the Notice of Grant (the "Exercise Price") subject to the terms, definitions and provisions of the Natus Medical Incorporated 1991 Stock Plan (the "Plan") adopted by the Company, which is incorporated herein by reference. Unless otherwise defined herein, the terms defined in the Plan shall have the same defined meanings in this Option.

If designated an Incentive Stock Option, this Option is intended to qualify as an Incentive Stock Option as defined in Section 422A of the Code.

2. Exercise of Option. This Option shall be exercisable during its term in accordance with the Vesting Schedule set out in the Notice of Grant and with the provisions of Section 9 of the Plan as follows:

(i) Right to Exercise.

(a) This Option may not be exercised for a fraction of a share.

(b) In the event of Optionee's death, disability or other termination of employment, the exercisability of the Option is governed by Sections 7, 8 and 9 below, subject to the limitation contained in subsection 2(i)(c).

(c) In no event may this Option be exercised after the date of expiration of the term of this Option as set forth in the Notice of Grant.

(ii) Method of Exercise. This Option shall be exercisable by written notice (in the form attached as Exhibit A) which shall state the election to exercise the Option, the number of Shares in respect of which the Option is being exercised, and such other representations and agreements as to the holder's investment intent with respect to such shares of Common Stock as may be required by the Company pursuant to the provisions of the Plan. Such written notice shall be signed by the Optionee and shall be delivered in person or by certified mail to the Secretary of the Company. The written notice shall be accompanied by payment of the exercise price. This Option shall be deemed to be exercised upon receipt by the Company of such written notice accompanied by the Exercise Price.

No Shares will be issued pursuant to the exercise of an Option unless such issuance and such exercise shall comply with all relevant provisions of law and the requirements of any stock exchange upon which the Shares may then be listed. Assuming such compliance, for income tax purposes the Shares shall be considered transferred to the Optionee on the date on which the Option is exercised with respect to such Shares.


3. Optionee's Representations. In the event the Shares purchasable pursuant to the exercise of this Option have not been registered under the Securities Act of 1933, as amended, at the time this Option is exercised, Optionee shall, if required by the Company, concurrently with the exercise of all or any portion of this Option, deliver to the Company his Investment Representation Statement in the form attached hereto as Exhibit B, and shall read the applicable rules of the Commissioner of Corporations attached to such Investment Representation Statement.

4. Method of Payment. Payment of the Exercise Price shall be by any of the following, or a combination thereof, at the election of the Optionee:

(i) cash; or

(ii) check; or

(iii) surrender of other shares of Common Stock of the Company which (A) either have been owned by the Optionee for more than six (6) months on the date of surrender or were not acquired, directly or indirectly, from the Company and (B) have a fair market value on the date of surrender equal to the Exercise Price of the Shares as to which the Option is being exercised.

5. Restrictions on Exercise. This Option may not be exercised until such time as the Plan has been approved by the shareholders of the Company, or if the issuance of such Shares upon such exercise or the method of payment of consideration for such shares would constitute a violation of any applicable federal or state securities or other law or regulation, including any rule under Part 207 of Title 12 of the Code of Federal Regulations ("Regulation G") as promulgated by the Federal Reserve Board. As a condition to the exercise of this Option, the Company may require Optionee to make any representation and warranty to the Company as may be required by any applicable law or regulation.

6. Section 16 Restrictions. Options granted to persons who are subject to Section 16 of the Exchange Act ("Insiders") may not be exercised for a period of at least six months from the date of grant, except in the case of death or disability.

7. Termination of Relationship. In the event Optionee's Continuous Status as an Employee or Consultant terminates, Optionee may, to the extent otherwise so entitled at the date of such termination (the "Termination Date"), exercise this Option during the Termination Period set out in the Notice of Grant. To the extent that Optionee was not entitled to exercise this Option at the date of such termination, or if Optionee does not exercise this Option within the time specified herein, the Option shall terminate.

8. Disability of Optionee. Notwithstanding the provisions of Section 7 above, in the event Optionee's Continuous Status as an Employee or Consultant terminates as a result of total and permanent disability (as defined in Section 22(e)(3) of the Code), Optionee may, but only within six (6) months from the date of termination of employment or consultancy (but in no event later than the date of expiration of the term of this Option as set forth in Section 11 below), exercise the Option to the extent otherwise so entitled at the date of such termination. To the extent that Optionee was not entitled to exercise the Option at the date of termination, or if Optionee does not exercise such Option (to the extent otherwise so entitled) within the time specified herein, the Option shall terminate.

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9. Death of Optionee. The Option may be exercised at any time within six
(6) months after the Optionee's death (but in no event later than the date of expiration of the term of this Option as set forth in Section 11 below), by Optionee's estate or by a person who acquired the right to exercise the Option by bequest or inheritance, but only to the extent the Optionee could exercise the Option at the date of death.

10. Non-Transferability of Option. This Option may not be transferred or assigned in any manner otherwise than by will or by the laws of descent or distribution and may be exercised during the lifetime of Optionee only by him. The terms of this Option shall be binding upon the executors, administrators, heirs, successors and assigns of the Optionee.

11. Term of Option. This Option may be exercised only within the term set out in the Notice of Grant, and may be exercised during such term only in accordance with the Plan and the terms of this Option.

12. Tax Consequences. Set forth below is a brief summary as of the date of this Option of some of the federal tax consequences of exercise of this Option and disposition of the Shares. THIS SUMMARY IS NECESSARILY INCOMPLETE, AND THE TAX LAWS AND REGULATIONS ARE SUBJECT TO CHANGE. OPTIONEE SHOULD CONSULT A TAX ADVISER BEFORE EXERCISING THIS OPTION OR DISPOSING OF THE SHARES.

(i) Exercise of ISO. If this Option qualifies as an ISO, there will be no regular federal income tax liability upon the exercise of the Option, although the excess, if any, of the fair market value of the Shares on the date of exercise over the Exercise Price will be treated as an adjustment to the alternative minimum tax for federal tax purposes and may subject the Optionee to the alternative minimum tax.

(ii) Exercise of Nonqualified Stock Option. If this Option does not qualify as an ISO, there may be a regular federal income tax liability upon the exercise of the Option. The Optionee will be treated as having received compensation income (taxable at ordinary income tax rates) equal to the excess, if any, of the fair market value of the Shares on the date of exercise over the Exercise Price. If Optionee is an employee, the Company will be required to withhold from Optionee's compensation or collect from Optionee and pay to the applicable taxing authorities an amount equal to a percentage of this compensation income at the time of exercise.

(iii) Disposition of Shares. In the case of an NSO, if Shares are held for at least one year, any gain realized on disposition of the Shares will be treated as long-term capital gain for federal income tax purposes. In the case of an ISO, if Shares transferred pursuant to the Option are held for at least one year after exercise and are disposed of at least two years after the Date of Grant, any gain realized on disposition of the Shares will also be treated as long-term capital gain for federal income tax purposes. If Shares purchased under an ISO are disposed of within such one-year period or within two years after the Date of Grant, any gain realized on such disposition will be treated as compensation income (taxable at ordinary income rates) to the extent of the excess, if any, of the fair market value of the Shares on the date of exercise over the Exercise Price.

(iv) Notice of Disqualifying Disposition of ISO Shares. If the Option granted to Optionee herein is an ISO, and if Optionee sells or otherwise disposes of any of the Shares acquired

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pursuant to the ISO on or before the later of (1) the date two years after the Date of Grant, or (2) the date one year after transfer of such Shares to the Optionee upon exercise of the ISO, the Optionee shall immediately notify the Company in writing of such disposition. Optionee agrees that Optionee may be subject to income tax withholding by the Company on the compensation income recognized by the Optionee from the early disposition by payment in cash or out of the current earnings paid to the Optionee.

NATUS MEDICAL INCORPORATED
a California corporation

By: _______________________________
Tim C. Johnson, President

OPTIONEE ACKNOWLEDGES AND AGREES THAT THE VESTING OF SHARES PURSUANT TO THE OPTION HEREOF IS EARNED ONLY BY CONTINUING CONSULTANCY OR EMPLOYMENT AT THE WILL OF THE COMPANY (NOT THROUGH THE ACT OF BEING HIRED, BEING GRANTED THIS OPTION OR ACQUIRING SHARES HEREUNDER). OPTIONEE FURTHER ACKNOWLEDGES AND AGREES THAT NOTHING IN THIS OPTION, NOR IN THE COMPANY'S 1991 STOCK PLAN WHICH IS INCORPORATED HEREIN BY REFERENCE, SHALL CONFER UPON OPTIONEE ANY RIGHT WITH RESPECT TO CONTINUATION OF EMPLOYMENT OR CONSULTANCY BY THE COMPANY, NOR SHALL IT INTERFERE IN ANY WAY WITH HIS RIGHT OR THE COMPANY'S RIGHT TO TERMINATE HIS EMPLOYMENT OR CONSULTANCY AT ANY TIME, WITH OR WITHOUT CAUSE.

Optionee acknowledges receipt of a copy of the Plan and certain information related thereto and represents that he is familiar with the terms and provisions thereof, and hereby accepts this Option subject to all of the terms and provisions of the Plan. Optionee has reviewed the Plan and this Option in their entirety, has had an opportunity to obtain the advice of counsel prior to executing this Option and fully understands all provisions relating to this Option. Optionee hereby agrees to accept as binding, conclusive and final all decisions or interpretations of the Board upon any questions arising under the Plan or this Option.

Dated: _____________________________ ___________________________________ Optionee

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EXHIBIT A

EXERCISE NOTICE

Natus Medical Incorporated
1501 Industrial Road
San Carlos, CA 94070

Attention: Secretary

1. Exercise of Option. Effective as of today, __________________, ______, the undersigned ("Optionee") hereby elects to exercise Optionee's option to purchase ____________ shares of the Common Stock (the "Shares") of Natus Medical Incorporated (the "Company") under and pursuant to the Company's 1991 Stock Option Plan, as amended (the "Plan") and the [ ] Incentive [ ] Nonqualified Stock Option Agreement dated _________________, ______ (the "Option Agreement").

2. Representations of Optionee. Optionee acknowledges that Optionee has received, read and understood the Plan and the Option Agreement and agrees to abide by and be bound by their terms and conditions. Optionee represents that Optionee is purchasing the Shares for Optionee's own account for investment and not with a view to, or for sale in connection with, a distribution of any of such Shares.

3. Compliance with Securities Laws. Optionee understands and acknowledges that the Shares have not been registered under the Securities Act of 1933, as amended (the "1933 Act"), and, notwithstanding any other provision of the Option Agreement to the contrary, the exercise of any rights to purchase any Shares is expressly conditioned upon compliance with the 1933 Act, all applicable state securities laws and all applicable requirements of any stock exchange or over the counter market on which the Company's Common Stock may be listed or traded at the time of exercise and transfer. Optionee agrees to cooperate with the Company to ensure compliance with such laws.

4. Federal Restrictions on Transfer. Optionee understands that the Shares have not been registered under the 1933 Act and therefore cannot be resold and must be held indefinitely unless they are registered under the 1933 Act or unless an exemption from such registration is available and that the certificate(s) representing the Shares may bear a legend to that effect. Optionee understands that the Company is under no obligation to register the Shares and that an exemption may not be available or may not permit Optionee to transfer Shares in the amounts or at the times proposed by Optionee. Specifically, Optionee has been advised that Rule 144 promulgated under the 1933 Act, which permits certain resales of unregistered securities, is not presently available with respect to the Shares and, in any event requires that the Shares be paid for and then be held for at least two years (and in some cases three years) before they may be resold under Rule 144.

5. Rights as Shareholder. Subject to the terms and conditions of this Agreement, Optionee shall have all of the rights of a shareholder of the Company with respect to the Shares from

and after the date that Optionee delivers full payment of the Exercise Price until such time as Optionee disposes of the Shares or the Company and/or its assignee(s) exercises the Right of First Refusal hereunder. Upon such exercise, Optionee shall have no further rights as a holder of the Shares so purchased except the right to receive payment for the Shares so purchased in accordance with the provisions of this Agreement, and Optionee shall forthwith cause the certificate(s) evidencing the Shares so purchased to be surrendered to the Company for transfer or cancellation.

6. Company's Right of First Refusal. Before any Shares held by Optionee or any transferee (either being sometimes referred to herein as the "Holder") may be sold or otherwise transferred (including transfer by gift or operation of law), the Company or its assignee(s) shall have a right of first refusal to purchase the Shares on the terms and conditions set forth in this Section (the "Right of First Refusal").

(a) Notice of Proposed Transfer. The Holder of the Shares shall deliver to the Company a written notice (the "Notice") stating: (i) the Holder's bona fide intention to sell or otherwise transfer such Shares; (ii) the name of each proposed purchaser or other transferee ("Proposed Transferee"); (iii) the number of Shares to be transferred to each Proposed Transferee; and (iv) the bona fide cash price or other consideration for which the Holder proposes to transfer the Shares (the "Offered Price"), and the Holder shall offer the Shares at the Offered Price to the Company or its assignee(s).

(b) Exercise of Right of First Refusal. At any time within thirty
(30) days after receipt of the Notice, the Company and/or its assignee(s) may, by giving written notice to the Holder, elect to purchase all, but not less than all, of the Shares proposed to be transferred to any one or more of the Proposed Transferees, at the purchase price determined in accordance with subsection (c) below.

(c) Purchase Price. The purchase price ("Purchase Price") for the Shares purchased by the Company or its assignee(s) under this Section shall be the Offered Price. If the Offered Price includes consideration other than cash, the cash equivalent value of the non-cash consideration shall be determined by the Board of Directors of the Company in good faith.

(d) Payment. Payment of the Purchase Price shall be made, at the option of the Company or its assignee(s), in cash (by check), by cancellation of all or a portion of any outstanding indebtedness of the Holder to the Company (or, in the case of repurchase by an assignee, to the assignee), or by any combination thereof within 30 days after receipt of the Notice or in the manner and at the times set forth in the Notice.

(e) Holder's Right to Transfer. If all of the Shares proposed in the Notice to be transferred to a given Proposed Transferee are not purchased by the Company and/or its assignee(s) as provided in this Section, then the Holder may sell or otherwise transfer such Shares to that Proposed Transferee at the Offered Price or at a higher price, provided that such sale or other transfer is consummated within 120 days after the date of the Notice and provided further that any such sale or other transfer is effected in accordance with any applicable securities laws and the Proposed Transferee agrees in writing that the provisions of this Section shall continue to apply to the Shares in the hands of such Proposed Transferee. If the Shares described in the Notice are not

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transferred to the Proposed Transferee within such period, a new Notice shall be given to the Company, and the Company and/or its assignees shall again be offered the Right of First Refusal before any Shares held by the Holder may be sold or otherwise transferred.

(f) Exception for Certain Family Transfers. Anything to the contrary contained in this Section notwithstanding, the transfer of any or all of the Shares during the Optionee's lifetime or on the Optionee's death by will or intestacy to the Optionee's immediate family or a trust for the benefit of the Optionee's immediate family shall be exempt from the provisions of this Section. "Immediate Family" as used herein shall mean spouse, lineal descendant or antecedent, father, mother, brother or sister. In such case, the transferee or other recipient shall receive and hold the Shares so transferred subject to the provisions of this Section, and there shall be no further transfer of such Shares except in accordance with the terms of this Section.

(g) Termination of Right of First Refusal. The Right of First Refusal shall terminate as to any Shares 90 days after the first sale of Common Stock of the Company to the general public pursuant to a registration statement filed with and declared effective by the Securities and Exchange Commission under the 1933 Act.

7. Tax Consultation. Optionee understands that Optionee may suffer adverse tax consequences as a result of Optionee's purchase or disposition of the Shares. Optionee represents that Optionee has consulted with any tax consultants Optionee deems advisable in connection with the purchase or disposition of the Shares and that Optionee is not relying on the Company for any tax advice.

8. Restrictive Legends and Stop-Transfer Orders.

(a) Legends. Optionee understands and agrees that the Company shall cause the legends set forth below or legends substantially equivalent thereto, to be placed upon any certificate(s) evidencing ownership of the Shares together with any other legends that may be required by state or federal securities laws:

THE SECURITIES REPRESENTED HEREBY HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933 (THE "ACT") AND MAY NOT BE OFFERED, SOLD OR OTHERWISE TRANSFERRED, PLEDGED OR HYPOTHECATED UNLESS AND UNTIL REGISTERED UNDER THE ACT OR, IN THE OPINION OF COUNSEL IN FORM AND SUBSTANCE SATISFACTORY TO THE ISSUER OF THESE SECURITIES, SUCH OFFER, SALE OR TRANSFER, PLEDGE OR HYPOTHECATION IS IN COMPLIANCE THEREWITH.

THE SHARES REPRESENTED BY THIS CERTIFICATE ARE SUBJECT TO CERTAIN RESTRICTIONS ON TRANSFER AND RIGHT OF FIRST REFUSAL OPTIONS HELD BY THE ISSUER OR ITS ASSIGNEE(S) AS SET FORTH IN THE EXERCISE NOTICE BETWEEN THE ISSUER AND THE ORIGINAL HOLDER OF THESE SHARES, A COPY OF WHICH MAY BE OBTAINED AT THE PRINCIPAL OFFICE OF THE ISSUER.

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SUCH TRANSFER RESTRICTIONS AND RIGHT OF FIRST REFUSAL ARE BINDING ON
TRANSFEEES OF THESE SHARES.

IT IS UNLAWFUL TO CONSUMMATE A SALE OR TRANSFER OF THIS SECURITY, OR ANY INTEREST THEREIN, OR TO RECEIVE ANY CONSIDERATION THEREFOR, WITHOUT THE PRIOR WRITTEN CONSENT OF THE COMMISSIONER OF CORPORATIONS OF THE STATE OF CALIFORNIA, EXCEPT AS PERMITTED IN THE COMMISSIONER'S RULES.

Optionee understands that transfer of the Shares may be restricted by
Section 260.141.11 of the Rules of the California Corporations Commissioner, a copy of which is attached to Exhibit B, the Investment Representation Statement.

(b) Stop-Transfer Notices. Optionee agrees that, in order to ensure compliance with the restrictions referred to herein, the Company may issue appropriate "stop transfer" instructions to its transfer agent, if any, and that, if the Company transfers its own securities, it may make appropriate notations to the same effect in its own records.

(c) Refusal to Transfer. The Company shall not be required (i) to transfer on its books any Shares that have been sold or otherwise transferred in violation of any of the provisions of this Agreement or (ii) to treat as owner of such Shares or to accord the right to vote or pay dividends to any purchaser or other transferee to whom such Shares shall have been so transferred.

9. Market Standoff Agreement. Optionee hereby agrees that if so requested by the Company or any representative of the underwriters in connection with any registration of the offering of any securities of the Company under the 1933 Act, Optionee shall not sell or otherwise transfer any Shares or other securities of the Company during the 180-day period following the effective date of a registration statement of the Company filed under the 1933 Act; provided, however, that such restriction shall only apply to the first two registration statements of the Company to become effective under the 1933 Act which include securities to be sold on behalf of the Company to the public in an underwritten public offering under the 1933 Act. The Company may impose stop-transfer instructions with respect to securities subject to the foregoing restrictions until the end of such 180-day period.

10. Successors and Assigns. The Company may assign any of its rights under this Agreement to single or multiple assignees, and this Agreement shall inure to the benefit of the successors and assigns of the Company. Subject to the restrictions on transfer herein set forth, this Agreement shall be binding upon Optionee and his or her heirs, executors, administrators, successors and assigns.

11. Interpretation. Any dispute regarding the interpretation of this Agreement shall be submitted by Optionee or by the Company forthwith to the Company's Board of Directors or the committee thereof that administers the Plan, which shall review such dispute at its next regular meeting. The resolution of such a dispute by the Board or committee shall be final and binding on the Company and on Optionee.

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12. Governing Law; Severability. This Agreement shall be governed by and construed in accordance with the laws of the State of California excluding that body of law pertaining to conflicts of law. Should any provision of this Agreement be determined by a court of law to be illegal or unenforceable, the other provisions shall nevertheless remain effective and shall remain enforceable.

13. Notices. Any notice required or permitted hereunder shall be given in writing and shall be deemed effectively given upon personal delivery or upon deposit in the United States mail by certified mail, with postage and fees prepaid, addressed to the other party at its address as shown below beneath its signature, or to such other address as such party may designate in writing from time to time to the other party.

14. Further Instruments. The parties agree to execute such further instruments and to take such further action as may be reasonably necessary to carry out the purposes and intent of this Agreement.

15. Delivery of Payment. Optionee herewith delivers to the Company the full Exercise Price for the Shares.

16. Entire Agreement. The Plan and Notice of Grant/Option Agreement are incorporated herein by reference. This Agreement, the Plan and the Notice of Grant/Option Agreement constitute the entire agreement of the parties and supersede in their entirety all prior undertakings and agreements of the Company and Optionee with respect to the subject matter hereof, and is governed by California law except for that body of law pertaining to conflict of laws.

Submitted by:                                Accepted by:

OPTIONEE:                                    NATUS MEDICAL INCORPORATED


______________________________________       By:  ______________________________
                (Signature)
                                             Its: ______________________________

______________________________________
                (Print Name)

Address:                                     Address:
-------                                      -------

______________________________________       1501 Industrial Road
______________________________________       San Carlos, CA  94070

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EXHIBIT B

INVESTMENT REPRESENTATION STATEMENT

OPTIONEE              :
                             ____________________________

COMPANY               :        NATUS MEDICAL INCORPORATED

SECURITY              :        COMMON STOCK

AMOUNT                :      ____________________________

DATE                  :      ____________________________

In connection with the purchase of the above-listed Securities, the undersigned Optionee represents to the Company the following:

(a) Optionee is aware of the Company's business affairs and financial condition and has acquired sufficient information about the Company to reach an informed and knowledgeable decision to acquire the securities. Optionee is acquiring these securities for investment for Optionee's own account only and not with a view to, or for resale in connection with, any "distribution" thereof within the meaning of the Securities Act of 1933, as amended (the "Securities Act").

(b) Optionee acknowledges and understands that the securities constitute "restricted securities" under the Securities Act and have not been registered under the Securities Act in reliance upon a specific exemption therefrom, which exemption depends upon, among other things, the bona fide nature of Optionee's investment intent as expressed herein. In this connection, Optionee understands that, in the view of the Securities and Exchange Commission, the statutory basis for such exemption may be unavailable if Optionee's representation was predicated solely upon a present intention to hold these Securities for the minimum capital gains period specified under tax statutes, for a deferred sale, for or until an increase or decrease in the market price of the Securities, or for a period of one year or any other fixed period in the future. Optionee further understands that the Securities must be held indefinitely unless they are subsequently registered under the Securities Act or an exemption from such registration is available. Optionee further acknowledges and understands that the Company is under no obligation to register the securities. Optionee understands that the certificate evidencing the securities will be imprinted with a legend which prohibits the transfer of the Securities unless they are registered or such registration is not required in the opinion of counsel satisfactory to the Company, a legend prohibiting their transfer without the consent of the Commissioner of Corporations of the State of California and any other legend required under applicable state securities laws.

(c) Optionee is familiar with the provisions of Rule 701 and Rule 144, each promulgated under the Securities Act, which, in substance, permit limited public resale of "restricted


securities" acquired, directly or indirectly from the issuer thereof, in a non- public offering subject to the satisfaction of certain conditions. Rule 701 provides that if the issuer qualifies under Rule 701 at the time of exercise of the Option by the Optionee, such exercise will be exempt from registration under the Securities Act. In the event the Company later becomes subject to the reporting requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, one hundred eighty (180) days thereafter the securities exempt under Rule 701 may be resold, subject to the satisfaction of certain of the conditions specified by Rule 144, including among other things: (1) the sale being made through a broker in an unsolicited "broker's transaction" or in transactions directly with a market maker (as said term is defined under the Securities Exchange Act of 1934); and, in the case of an affiliate, (2) the availability of certain public information about the Company, and the amount of securities being sold during any three month period not exceeding the limitations specified in Rule 144(e), if applicable.

In the event that the Company does not qualify under Rule 701 at the time of exercise of the Option, then the securities may be resold in certain limited circumstances subject to the provisions of Rule 144, which requires among other things: (1) the resale occurring not less than two years after the party has purchased, and made full payment for, within the meaning of Rule 144, the securities to be sold; and, in the case of an affiliate, or of a non- affiliate who has held the securities less than three years, (2) the availability of certain public information about the Company, (3) the sale being made through a broker in an unsolicited "broker's transaction" or in transactions directly with a market maker (as said term is defined under the Securities Exchange Act of 1934), and (4) the amount of securities being sold during any three month period not exceeding the specified limitations stated therein, if applicable.

(d) Optionee agrees, in connection with the Company's initial underwritten public offering of the Company's securities, (1) not to sell, make short sale of, loan, grant any options for the purchase of, or otherwise dispose of any shares of Common Stock of the Company held by Optionee (other than those shares included in the registration) without the prior written consent of the Company or the underwriters managing such initial underwritten public offering of the Company's securities for one hundred eighty (180) days from the effective date of such registration, and (2) further agrees to execute any agreement reflecting (1) above as may be requested by the underwriters at the time of the public offering; provided however that the officers and directors of the Company who own the stock of the Company also agree to such restrictions.

(e) Optionee further understands that in the event all of the applicable requirements of Rule 701 or 144 are not satisfied, registration under the Securities Act, compliance with Regulation A, or some other registration exemption will be required; and that, notwithstanding the fact that Rules 144 and 701 are not exclusive, the Staff of the Securities and Exchange Commission has expressed its opinion that persons proposing to sell private placement securities other than in a registered offering and otherwise than pursuant to Rules 144 or 701 will have a substantial burden of proof in establishing that an exemption from registration is available for such offers or sales, and that such persons and their respective brokers who participate in such transactions do so at their own risk. Optionee understands that no assurances can be given that any such other registration exemption will be available in such event.

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(f) Optionee understands that the certificate evidencing the Securities will be imprinted with a legend which prohibits the transfer of the Securities without the consent of the Commissioner of Corporations of California. Optionee has read the applicable Commissioner's Rules with respect to such restriction, a copy of which is attached.

Signature of Optionee:


Date: ___________________, _________

C:\wpconv\wp2edgw\tmp2.doc

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ATTACHMENT 1

STATE OF CALIFORNIA - CALIFORNIA ADMINISTRATIVE CODE
Title 10. Investment - Chapter 3. Commissioner of Corporations

260.141.11: Restriction on Transfer. (a) The issuer of any security upon which a restriction on transfer has been imposed pursuant to Sections 260.102.6, 260.141.10 or 260.534 shall cause a copy of this section to be delivered to each issuee or transferee of such security at the time the certificate evidencing the security is delivered to the issuee or transferee.

(b) It is unlawful for the holder of any such security to consummate a sale or transfer of such security, or any interest therein, without the prior written consent of the Commissioner (until this condition is removed pursuant to
Section 260.141.12 of these rules), except:

(1) to the issuer;

(2) pursuant to the order or process of any court;

(3) to any person described in Subdivision (i) of Section 25102 of the Code or Section 260.105.14 of these rules;

(4) to the transferror's ancestors, descendants or spouse, or any custodian or trustee for the account of the transferrer or the transferror's ancestors, descendants, or spouse; or to a transferee by a trustee or custodian for the account of the transferee or the transferee's ancestors, descendants or spouse;

(5) to holders of securities of the same class of the same issuer;

(6) by way of gift or donation inter vivos or on death;

(7) by or through a broker-dealer licensed under the Code (either acting as such or as a finder) to a resident of a foreign state, territory or country who is neither domiciled in this state to the knowledge of the broker- dealer, nor actually present in this state if the sale of such securities is not in violation of any securities law of the foreign state, territory or country concerned;

(8) to a broker-dealer licensed under the Code in a principal transaction, or as an underwriter or member of an underwriting syndicate or selling group;

(9) if the interest sold or transferred is a pledge or other lien given by the purchaser to the seller upon a sale of the security for which the Commissioner's written consent is obtained or under this rule not required;

(10) by way of a sale qualified under Sections 25111, 25112, 25113 or 25121 of the Code, of the securities to be transferred, provided that no order under Section 25140 or Subdivision (a) of Section 25143 is in effect with respect to such qualification;

(11) by a corporation to a wholly owned subsidiary of such corporation, or by a wholly owned subsidiary of a corporation to such corporation;

(12) by way of an exchange qualified under Section 25111, 25112 or 25113 of the Code, provided that no order under Section 25140 or Subdivision (a) of Section 25143 is in effect with respect to such qualification;

(13) between residents of foreign states, territories or countries who are neither domiciled nor actually present in this state;

(14) to the State Controller pursuant to the Unclaimed Property Law or to the administrator of the unclaimed property law of another state;

(15) by the State Controller pursuant to the Unclaimed Property Law or by the administrator of the unclaimed property law of another state if, in either such case, such person (i) discloses to potential purchasers at the sale that transfer of the securities is restricted under this rule, (ii) delivers to each purchaser a copy of this rule, and (iii) advises the Commissioner of the name of each purchaser;

(16) by a trustee to a successor trustee when such transfer does not involve a change in the beneficial ownership of the securities; or

(17) by way of an offer and sale of outstanding securities in an issuer transaction that is subject to the qualification requirement of Section 25110 of the Code but exempt from that qualification requirement by subdivision (f) of Section 25102;

provided that any such transfer is on the condition that any certificate evidencing the security issued to such transferee shall contain the legend required by this section.

(c) The certificates representing all such securities subject to such a restriction on transfer, whether upon initial issuance or upon any transfer thereof, shall bear on their face a legend, prominently stamped or printed thereon in capital letters of not less than 10-point size, reading as follows:

"IT IS UNLAWFUL TO CONSUMMATE A SALE OR TRANSFER OF THIS SECURITY, OR ANY INTEREST THEREIN, OR TO RECEIVE ANY CONSIDERATION THEREFOR, WITHOUT THE PRIOR WRITTEN CONSENT OF THE COMMISSIONER OR CORPORATIONS OF THE STATE OF

CALIFORNIA, EXCEPT AS PERMITTED IN THE COMMISSIONER'S RULES."


EXHIBIT 10.3

NATUS MEDICAL INCORPORATED
2000 STOCK OPTION PLAN

1. Purposes of the Plan. The purposes of this Stock Option Plan are to attract and retain the best available personnel for positions of substantial responsibilty, to provide additional incentive to Employees, Directors and Consultants and to promote the success of the Company's business. Options granted under the Plan may be Incentive Stock Options or Nonstatutory Stock Options, as determined by the Administrator at the time of grant.

2. Definitions. As used herein, the following definitions shall apply:

(a) "Administrator" means the Board or any of its Committees appointed in accordance with section 4 hereof.

(b) "Applicable Laws" means the requirements relating to the administration of stock option plans under U.S. state corporate laws, U.S. federal and state securities laws, the Code, any stock exchange or quotation system on which the Common Stock is listed or quoted and the applicable laws of any foreign country or jurisdiction where Options are, or will be, granted under the Plan.

(c) "Board" means the Board of Directors of the Company.

(d) "Code" means the Internal Revenue Code of 1986, as amended.

(e) "Committee" means a committee of Directors appointed by the Board in accordance with Section 4 hereof.

(f) "Common Stock" means the Common Stock of the Company.

(g) "Company" means Natus Medical Incorporated, a Delaware corporation.

(h) "Consultant" means any person who is engaged by the Company or any Parent or Subsidiary to render consulting or advisory services to such entity and who is compensated for such services, including a Director.

(i) "Director" means a member of the Board of Directors of the Company.

(j) "Employee" means any person, including Officers and Directors, employed by the Company or any Parent or Subsidiary of the Company. A Service Provider shall not cease to be an Employee in the case of (i) any leave of absence approved by the company or (ii) transfers between locations of the Company or between the Company, its Parent, any Subsidiary, or any successor. For purposes of Incentive Stock Options, no such leave may exceed ninety days, unless reemployment upon expiration of such leave is guaranteed by statue or contract. If reemployment upon expiration of a leave of absence approved by the Company is not so guaranteed, on the 181/st/ day of such leave any Incentive Stock Option held by the Optionee shall cease to be treated as an

Incentive Stock Option and shall be treated for tax purposes as a Nonstatutory Stock Option. Neither service as a Director nor payment of a director's fee by the Company shall be sufficient to constitute "employment" by the Company.

(k) "Exchange Act" means the Securities Exchange Act of 1934, as amended.

(l) "Fair Market Value" means, as of any date, the value of Common Stock determined as follows:

(i) If the Common Stock is listed on any established stock exchange or a national market system including, without limitation, the Nasdaq National Market at The Nasdaq SmallCap Market of The Nasdaq Stock Market, its Fair Market shall be the closing sales price for such stock (or the closing bid, if no sales were reported) as quoted on such exchange or system for the last market trading day prior to the time of determination, as reported in The Wall Street Journal or such other source as the Administrator deems reliable;

(ii) If the Common Stock is regularly quoted by a recognized securities dealer but selling prices are not reported, its Fair Market Value shall be the mean between the high bid and low asked prices for the Common Stock on the last market trading day prior to the day of determined; or

(iii) In the absence of an established market for the Common Stock, the Fair Market Value thereof shall be determined in good faith by the Administrator.

(m) "Incentive Stock Option" means an Option intended to qualify as an incentive stock option within the meaning of Section 422 of the Code.

(n) "Nonstatutory Stock Option" means an Option not intended to qualify as an Incentive Stock Option.

(o) "Officer" means a person who is an officer of the Company within the meaning of Section 16 of the Exchange Act and the rules and regulations promulgated thereunder.

(p) "Option" means a stock option granted pursuant to the Plan.

(q) "Option Agreement" means a written or electronic agreement between the Company and an Optionee evidencing the terms and conditions of an individual Option grant. The Option Agreement is subject to the terms and conditions of the Plan.

(r) "Option Exchange Program" means a program whereby outstanding Options are exchanged for Options with a lower exercise price.

(s) "Optioned Stock" means the Common Stock subject to an Option.

(t) "Optionee" means the holder of an outstanding Option granted under the Plan.

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(u) "Parent" means a "parent corporation," whether now or hereafter existing, as defined in Section 424(e) of the Code.

(v) "Plan" means this 2000 Stock Option Plan.

(w) "Service Provider" means an Employee, Director or Consultant.

(x) "Share" means a share of the Common Stock, as adjusted in accordance with Section 12 below.

(y) "Subsidiary means a "subsidiary corporation," whether now or hereafter existing, as defined in Section 424(f) of the Code.

3. Stock Subject to the Plan. Subject to the provisions of Section 12 of the Plan, the maximum aggregate number of Shares (as adjusted for the July 2000 two-for-five reverse split) which may be subject to option and sold under the Plan is 1,500,000 Shares (post-split), together with an annual increase in the number of shares of Common Stock reserved for issuance hereunder on the first day of the Company's fiscal year, beginning with January 1, 2002, equal to the lesser of (i) 1,500,000 Shares (post-split), (ii) seven percent (7%) of the outstanding Shares of the Company as of the last day of the prior fiscal year or (iii) such amount as determined by the Board of Directors. The Shares may be authorized but unissued, or reacquired Common Stock.

If an Option expires or becomes unexercisable without having been exercised in full, or is surrendered pursuant to an Option Exchange Program, the unpurchased Shares which were subject thereto shall become available for future grant or sale under the Plan (unless the Plan has terminated). However, Shares that have actually been issued under the Plan, upon exercise of an Option,shall not be returned to the Plan and shall not become available for future distribution under the Plan.

4. Administration of the Plan.

(a) Procedure.

(i) Multiple Administrative Bodies. The Plan may be administered by different groups of Employees and consultants.

(ii) Section 162(m). To the extent that the Administrator determines it to be desirable to qualify Options granted hereunder as "performed-based compensation" within the meaning Section 162(m) of the Code.

(iii) Rule 16b-3. To the extent desirable to qualify transactions hereunder as exempt under Rule 16b-3, the transactions completed hereunder shall be structured to satisfy the requirements for exemption under Rule 16b-3.

(iv) Other Administration. Other than as provided above, the Plan shall be administered by (A) the Board or (B) a Committee, which Committee shall be constituted to satisfy Applicable Laws.

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(b) Powers of the Administrator. Subject to the provisions of the Plan and, in the case of a Committee, the specific duties delegated by the Board to such Committee, and subject to the approval of any relevant authorities, the Administrator shall have the authority in its discretion:

(i) to determine the Fair Market Value;

(ii) to select the Service Providers to whom Options and Stock Purchase Rights may from time to time be granted hereunder;

(iii) to determine the number of Shares to be covered by each such award granted hereunder;

(iv) to approve forms of agreements for use under the Plan;

(v) to determine the terms and conditions, of any Options granted hereunder. Such terms and conditions include, but are not limited to, the exercise price, the time or times when Options may be exercised (which may be based on performance criteria), any vesting acceleration or waiver of forfeiture restrictions, and any restriction or limitation regarding any Option or the Common Stock relating thereto, based in each case on such factors as the Administrator, in its sole discretion, shall determine;

(vi) to determine whether and under what circumstances an Option any be settled in cash under subsection 9(f) instead of Common Stock;

(vii) to reduce the exercise price of any Option to the then current Fair Market Value if the Fair Market Value of the Common Stock covered by such Option has declined since the date the Option was granted;

(viii) to initiate an Option Exchange Program;

(ix) to prescribe, amend and rescind rules and regulations relating to the Plan, including rules and regulations relating to sub-plans established for the purpose of qualifying for preferred tax treatment under foreign tax laws;

(x) to allow Optionees to satisfy withholding tax obligations by electing to have the Company withhold from the Shares to be issued upon exercise of an Option that number of Shares having a Fair Market Value equal to the amount required to be withheld. The Fair Market Value of the Shares to be withheld shall be determined on the date that the amount of tax to be withheld is to be determined. All elections by Optionees to have Shares withheld for this purpose shall be made in such form and under such conditions as the Administrator may deem necessary or advisable; and

(xi) to construe and interpret the terms of the Plan and awards granted pursuant to the Plan.

(xii) to make all other determinations deemed necessary or advisable for administering the Plan.

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(c) Effect of Administrator's Decision. All decisions, determinations and interpretations of the Administrator shall be final and binding on all optionees.

5. Eligibility.

(a) Nonstatutory Stock Options may be granted to Service Providers. Incentive Stock Options may be granted only to Employees.

(b) Each Option shall be designated in the Option Agreement as either an Incentive Stock Option or a Nonstatutory Stock Option. However, notwithstanding such designation, to the extent that the aggregate Fair Market Value of the Shares with respect to which Incentive Stock Options are exercisable for the first time by the Optionee during any calendar year under all plans of the Company and any Parent or Subsidiary) exceeds $100,000, such Options shall be treated as Nonstatutory Stock Options. For purposes of this
Section 5(b), Incentive Stock Options shall be taken into account in the order in which they were granted. The Fair Market Value of the Shares shall be determined as of the time the Option with respect to such Shares is granted.

(c) Neither the Plan nor any Option shall confer upon any Optionee any right with respect to continuing the Optionee's relationship as a Service Provider with the Company, nor shall it interfere in any way with his or her right or the Company's right to terminate such relationship at any time, with or without cause.

(d) Upon the Company, or a successor corporation issuing any class of common equity securities required to be registered under Section 12 of the Exchange Act, or upon the Plan being assumed by a corporation having a class of common equity securities required to be registered under Section 12 of the Exchange Act, the following limitations shall apply to grants to options to Service Providers:

(i) No Employee shall be granted in any fiscal year, Options to purchase more than 1,000,000 Shares (post-split).

(ii) In connection with his or her initial employment, and Employee may be granted Options to purchase up to an additional 500,000 Shares (post-split) which shall not count against the amount set forth in subsection
(i) above.

(iii) The foregoing limitations shall be adjusted appropriately in connection with any change in the Company's capitalization as described in
Section 11.

(iv) If any Option is cancelled in the same fiscal year of the Company in which it was granted (other than in connection with a transaction described in Section 11), the cancelled Option will be counted against the limits set forth in subsections (i) and (ii) above. For this purpose, if the exercise price of an Option is reduced, the transaction will be treated as a cancellation of the Option and the grant of a new Option.

6. Term of Plan. The Plan shall become effective upon its adoption by the Board; provided, however, the Plan shall not become effective until the effective date of the Company's initial public offering pursuant to a registration statement filed with the Securities and Exchange

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Commission. It shall continue in effect for a term of ten (10) years unless sooner terminated under Section 14 of the Plan.

7. Term of Option. The term of Option shall be stated in the Option Agreement; provided, however, that the term shall be no more than ten (10) years from the date of grant thereof. In the case of an Incentive Stock Option granted to an Optionee who, at the time of the Option is granted, owns stock representing more than the percent (10%) of the voting power of all classes of stock of the Company or any Parent or Subsidiary, the term of the Option shall be five (5) years from the date of grant or such shorter term as may be provided in the Option Agreement.

8. Option Excess Price and Consideration.

(a) The per share exercise price for the Shares to be issued upon exercise of an Option shall be such price as is determined by the Administrator, but shall be subject to the following:

(i) In the case of an Incentive Stock Option

(A) granted to an Employee who, at the time of grant of such Option, owns stock representing more than ten percent (10%) of the voting power of all classes of stock of the Company or any Parent or Subsidiary, the exercise price shall be no less than 110% of the Fair Market Value per Share on the date of grant.

(B) granted to any other Employee, the Per Share exercise price shall be no less than 100% of the Fair Market Value per Share on the date of grant.

(ii) In the case of a Nonstatutory Stock Option granted to a Service Provider who, at the time of grant of such Option, owns stock representing more than ten percent (10%) of the voting power of all classes of stock of the Company or any Parent or Subsidiary, the exercise price shall be no less than 110% of the Fair Market Value per Share on the date of the grant.

(iii) Notwithstanding the foregoing, Options may be granted with a per Share exercise price other than as required above pursuant to a merger or other corporate transaction.

(b) The consideration to be paid for the Shares to be issued upon exercise of an Option, including the method of payment, shall be determined by the Administrator (and, in the case of an Incentive Stock Option, shall be determined at the time of grant). Such consideration may consist of (1) cash,
(2) check, (3) promissory note, (4) other Shares which (x) in the case of Shares acquired upon exercise of an Option, have been owned by the Optionee for more than six months on the date of surrender, and (y) have a Fair Market Value on the date of surrender equal to the aggregate exercise price of the Shares as to which such Option shall be exercised, (5) delivery of a properly executed exercise notice together with such other documentation as the Administrator and the broker, if applicable, shall require to effect an exercise of the Option and delivery to the Company of the sale or loan proceeds required to pay the exercise price, (6) consideration received by the Company under a cashless exercise program implemented by the Company in connection with the Plan, (7) any combination of the foregoing methods of payment, or (8) such other consideration and method of payment for the issuance of Shares to the extent permitted by Applicable Laws. In making

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its determination as to the type of consideration to accept, the Administrator shall consider if acceptance of such consideration may be reasonably expected to benefit the Company.

9. Exercise of Option.

(a) Procedure for Exercise; Rights as a Stockholder. Any Option granted hereunder shall be exercisable according to the terms hereof at such times and under such conditions as determined by the Administrator set forth in the Option Agreement. Unless the Administrator provides otherwise, vesting of Options granted hereunder shall be tolled during any unpaid leave of absence.

An Option may not be exercised for a fraction of a Share.

An Option shall be deemed exercised when the Company receives:
(i) written electronic notice of exercise (in accordance with the Option Agreement) from the person entitled to exercise the Option, and (ii) full payment for the Shares with respect to which the Option is exercised. Full payment may consist of any consideration and method of payment authorized by the Administrator and permitted by the Option Agreement and the Plan. Shares issued upon exercise of an Option shall be issued in the name of the Optionee or, if requested by the Optionee, in the name of the Optionee and his or her spouse. Until the Shares are issued (as evidenced by the appropriate entry on the books of the Company or of a duly authorized transfer agent of the Company), no right to vote or receive dividends or any other rights as a Stockholder shall exist issue (or cause to be issued) such Shares promptly after the Option is exercised. No adjustment will be made for a dividend or other right for which the record date is prior to the date the Shares are issued, except as provided in Section 12 of the Plan.

Exercise of an Option in any manner shall result in a decrease in the number of Shares thereafter available, both for purposes of the Plan and for sale under the Option, by the number of Shares as to which the Option is exercised.

(b) Termination of Relationship as a Service Provider. If an Optionee ceases to be a Service Provider, such Optionee may exercise his or her Option within such period of time as is specified in the Option Agreement (of at least thirty (30) days) to the extent that the Option is vested on the date of termination (but in no event later than the expiration of the term of the Option as set forth in the Option Agreement). In the absence of a specified time in the Option Agreement, the Option shall remain exercisable for three (3) months following the Optionee's termination. If, on the date of termination, the Optionee is not vested as to his or her entire Option, the Shares covered by the unvested portion of the Option shall revert to the Plan. If, after termination, the Optionee does not exercise his or her Option within the time specified by the Administrator, the Option shall terminate, and the shares covered by such Option shall revert to the Plan.

(c) Disability of Optionee. If an Optionee ceases to be a Service Provider as a result of the Optionee's Disability, the Optionee may exercise his or her Option within such period of time as is specified in the Option Agreement to the extent the Option is vested on the date of termination (but in no event later that the expiration of the term of such Option as set forth in the

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Option Agreement). In the absence of a special time in the Option Agreement, the Option shall remain exercisable for twelve (12) months following the Optionee's termination. If such disability is not a "disability" as such term is defined in
Section 22(e)(3) of the Code, in the case of an Incentive Stock Option such Incentive Stock Option shall automatically cease to be treated as an Incentive Stock Option and shall be treated for tax purposes as a Nonstatutory Stock Option on the day three months and one day following such termination. If, on the date of termination, the Optionee is not vested as to his or her entire Option, the Shares covered by the unvested portion of the Option shall revert to the Plan. If, after termination, the Optionee does not exercise his or her Option within the time specified herein, the Option shall terminate, and the Shares covered by such Option shall revert to the Plan.

(d) Death of Optionee. If an Optionee dies while a Service Provider, the Option may be exercised within such period of time as is specified in the Option Agreement (but in no event later than the expiration of the term of such Option as set forth in the Notice of Grant), by the Optionee's estate or by a person who acquires the right to exercise the Option by bequest or inheritance, but only to the extent that the Option is vested on the date of death. In the absence of a specified time in the Option Agreement, the Option shall remain exercisable for twelve (12) months following the Optionee's termination. If, at the time of death, the Optionee is not vested as to his or her entire Option, the Shares covered by the unvested portion of the Option shall immediately revert to the Plan. The Option may be exercised by the executor or administrator of the Optionee's estate or if none, by the person(s) entitled to exercise the Option under the Optionee's will or the laws of descent or distribution. If the Option is not so exercised within the time specified herein, the Option shall terminate, and the Shares covered by such Option shall revert to the Plan.

(e) Buyout Provisions. The Administrator may at any time offer to buy out for a payment in cash or Shares, an Option previously granted, based on such terms and conditions as the Administrator shall establish and communicate to the Optionee at the time that such offer is made.

10. Non-Transferability of Options. Options may not be sold, pledged, assigned, hypothecated, transferred, or disposed of in any manner other than by will or by the laws of descent or distribution and may be exercised, during the lifetime of the Optionee, only by the Optionee.

11. Adjustments Upon Changes in Capitalization, Merger or Asset Sale.

a) Changes in Capitalization. Subject to any required action by the Stockholders of the Company, the number of shares of Common Stock covered by each outstanding Option, and the number of shares of Common Stock which have been authorized for issuance under the Plan but as to which no Options have yet been granted or which have been returned to the Plan upon cancellation or expiration of an Option, as well as the price per share of Common Stock covered by each such outstanding Option, shall be proportionately adjusted for any increase or decrease in the number of issued shares of Common Stock resulting from a stock split, reverse stock split, stock dividend, combination of reclassification of the Common Stock, or any other increase or decrease in the number of issued shares of Common Stock effected without receipt of consideration by the Company. The conversion of any convertible securities of the Company shall not be deemed to have been "effected without receipt of consideration." Such adjustment shall be made by the Board, whose determination in that respect shall be final, binding and conclusive. Except as expressly provided

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herein, no issuance by the Company of shares of stock of any class, or securities convertible into shares of stock of any class, shall affect, and no adjustment by reason thereof shall be made with respect to, the number or price of shares of Common Stock subject to an Option.

(b) Dissolution or Liquidation. In the event of the proposed dissolution or liquidation of the Company, the Administrator shall notify each Optionee as soon as practicable prior to the effective date of such proposed transaction. The Administrator in its discretion may provide for an Optionee to have the right to exercise his or her Option until fifteen (15) days prior to such transaction as to all of the Optioned Stock covered thereby, including Shares as to which the Option would not otherwise be exercisable. In addition, the Administrator may provide that any Company repurchase option applicable to any Shares purchased upon exercise of an Option shall lapse as to all such Shares, provided the proposed dissolution or liquidation takes place at the time and in the manner contemplated. To the extent it has not been previously exercised, an Option will terminate immediately prior to the consummation of such proposed action.

(c) Merger or Asset Sale.

(i) In the event of a merger of the Company with or into another corporation or the sale of all or substantially all of the assets of the Company pursuant to which the shareholders of the Company prior to such transaction hold less than 50% of the outstanding capital stock of the surviving corporation immediately after the closing of such transaction a "Change in Control Transaction") within four years after the date the Securities and Exchange Commission declares effective a registration statement filed by the Company for the initial public offering of the Company's Common Stock pursuant to the Securities Act (the "IPO Effective Time"), outstanding Options may be assumed or equivalent options may be substituted by the successor corporation or a Parent or Subsidiary thereof (the "Successor Corporation"). Following such assumption or substitution, if the Optionee's status as an employee of the Company or employee of the Successor Corporation, as applicable, is terminated within 12 months of the Change in Control Transaction other than upon a voluntary resignation by the Optionee or the termination of Optionee for cause, the Option or option shall become fully exercisable, including as to Shares for which it would not otherwise be exercisable. Thereafter, the Option or option shall remain exercisable in accordance with Sections 9(b) through (d) above. If the SUccessor Corporation does not assume an outstanding Option or substitute for it an equivalent option, the Option shall become fully vested and exercisable, including as to Shares for which it would not otherwise be exercisable. In such event the Board shall notify the Optionee that the Option shall be fully exercisable for a period of fifteen (15) days from the date of such notice, and upon the expiration of such period, the Option shall terminate.

(ii) In the event of a Change in Control Transaction after four years after the IPO Effective Time, outstanding Options may be assumed or equivalent options may be substituted by the Successor Corporation at the Administrator's discretion. The Administrator also shall have the discretion to terminate the Plan and permit the Optionee to exercise the Option to the extent already vested and the discretion to make a determination to accelerate vesting of any portion of or all of the outstanding Options. The Administrator may provide at the Administrator's discretion that following an assumption or substitution, if the Optionee's status as an employee of the Company or employee of the Successor Corporation, as applicable, is terminated within 12 months of the Change in Control Transaction other than upon a voluntary resignation by the Optionee or the termination of Optionee

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for cause, the Option or option shall become fully exercisable, including as to Shares for which it would not otherwise be exercisable. Thereafter, the Option or option shall remain exercisable in accordance with Section 9(b) through (d) above. In such event the Board shall notify the Optionee that the Option shall be fully exercisable for a period of fifteen (15) days from the date of such notice, and upon the expiration of such period the Option shall terminate.

(iii) Notwithstanding the foregoing, until such time as the Company is no longer subject to Section 21115 of the California Corporation Code, in the event of a Change in Control Transaction, each outstanding Option shall be assumed or an equivalent option or right substituted by the Successor Corporation. In the event that the Successor Corporation refuses to assume or substitute for the Option, the Option shall terminate upon the closing of the merger or sale of assets.

(iv) In the event of the merger of the Company with or into another corporation or the sale of substantially all of the assets of the Company in a transaction that is not a Change in Control Transaction, each outstanding option shall be assumed or an equivalent option shall be substituted by the Successor Corporation. In the event the Successor Corporation refuses to assume or substitute for the Option, each outstanding Option shall terminate upon the closing of such merger or sale of assets.

For the purposes of this Section 11(c), an Option shall be considered assumed if, following the merger or sale of assets, the Option confers the right to purchase or receive, for each Share of Optioned Stock subject to the Option immediately prior to the merger or sale of assets, the consideration (whether stock, cash, or other securities or property) received in the merger or sale of assets by holders of Common Stock for each Share held on the effective date of the transaction (and if holders were offered a choice of consideration, the type of consideration chosen by the holders of a majority of the outstanding Shares). If such consideration received in the merger or sale of assets is not solely common stock of the successor corporation or its Parent, the Administrator may, with the consent of the successor corporation, provide for the consideration to be received upon the exercise of the Option, for each Share of Optioned Stock subject to the Option, to be solely common stock of the successor corporation or its Parent equal in fair market value to the per share consideration received by holders of Common Stock in the merger or sale of assets.

12. Time of Granting Options and Stock Purchase Rights. The date of grant of an Option shall, for all purposes, be at the date on which the Administrator makes the determination granting such Option, or such other date as is determined by the Administrator. Notice of the determination shall be given to each Employee or Consultant to whom an Option is so granted within a reasonable time after the date of such grant.

13. Amendment and Termination of the Plan.

(a) Amendment and Termination. The Board may at any time amend, alter, suspend or terminate the Plan.

(b) Stockholder Approval. The Board shall obtain stockholder approval of any Plan amendment to the extent necessary and desirable to comply with Applicable Laws.

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(c) Effect of Amendment or Termination. No amendment, alteration, suspension or termination of the Plan shall impair the rights of any Optionee, unless mutually agreed otherwise between the Optionee and the Administrator, which agreement must be in writing and signed by the Optionee and the Company. Termination of the Plan shall not affect the Administrator's ability to exercise the powers granted to it hereunder with respect to Options granted under the Plan prior to the date of such termination.

14. Conditions Upon Issuance of Shares.

(a) Legal Compliance. Shares shall not be issued pursuant to the exercise of an Option unless the exercise of such Option and the issuance and delivery of such Shares shall comply with Applicable Laws and shall be further subject to the approval of counsel for the Company with respect to such compliance.

(b) Investment Representations. As a condition to the exercise of an Option, the Administrator may require the person exercising such Option to represent and warrant at the time of any such exercise that the Shares are being purchased only for investment and without any present intention to sell or distribute such Shares if, in the opinion of counsel for the Company, such a representation is required.

15. Inability to Obtain Authority. The inability of the Company to obtain authority from any regulatory body having jurisdiction, which authority is deemed by the Company's counsel to be necessary to the lawful issuance and sale of any Shares hereunder, shall relieve the Company of any liability in respect of the failure to issue or sell Shares as to which such requisite authority shall not have been obtained.

16. Reservation of Shares. The Company, during the term of this Plan, shall at all times reserve and keep available such number of Shares as shall be sufficient to satisfy the requirements of the Plan.

17. Stockholder Approval. The Plan shall be subject to approval by the stockholders of the Company within twelve (12) months after the date the Plan is adopted. Such stockholder approval shall be obtained in the degree and manner required Applicable Laws.

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EXHIBIT 10.3.1

NATUS MEDICAL INCORPORATED
2000 STOCK OPTION PLAN
STOCK OPTION AGREEMENT

Unless otherwise defined herein, the terms defined in the Plan shall have the same defined meanings in this Option Agreement.

I. NOTICE OF STOCK OPTION GRANT

[Optionee's Name and Address]

The undersigned Optionee has been granted an Option to purchase Common Stock of the Company, subject to the terms and conditions of the Plan and this Option Agreement, as follows:

Grant Number                    _______________________

Date of Grant                   _______________________

Vesting Commencement Date       _______________________

Exercise Price per Share        $ _____________________

Total Number of Shares Granted    _____________________

Total Exercise Price            $ _____________________

Type of Option:                 ___  Incentive Stock Option

                                ___  Nonstatutory Stock Option

Term/Expiration Date:           _______________________

Vesting Schedule:

This Option shall be exercisable, in whole or in part, according to the following vesting schedule:

[25% of the Shares subject to the Option shall vest twelve months after the Vesting Commencement Date, and 1/48 of the Shares subject to the Option shall vest each month thereafter, subject to Optionee's continuing to be a Service Provider on such dates.]


Termination Period:

This Option shall be exercisable for 30 days after Optionee ceases to be a Service Provider. Upon Optionee's death or disability, this Option may be exercised for such longer period as provided in the Plan. In no event may Optionee exercise this Option after the Term/Expiration Date as provided above.

II. AGREEMENT

1. Grant of Option. The Plan Administrator of the Company hereby grants to the Optionee named in the Notice of Grant (the "Optionee"), an opt (the "Option") to purchase the number of Shares set forth in the Notice of Grant, at the exercise price per Share set forth in the Notice of Grant (the "Exercise Price"), and subject to the terms and conditions of the Plan, which is incorporated herein by reference. Subject to Section 13(c) of the Plan, in the event of a conflict between the terms and conditions of the Plan and this Option Agreement, the terms and conditions of the Plan shall prevail .

If designated in the Notice of Grant as an Incentive Stock Option ("ISO"), this Option is intended to qualify as an Incentive Stock Option as defined in Section 422 of the Code. Nevertheless, to the extent that it exceeds the $100,000 rule of Code Section 422(d), this Option shall be treated as a Nonstatutory Stock Option ("NSO").

2. Exercise of Option.

(a) Right to Exercise. This Option shall be exercisable during its term in accordance with the Vesting Schedule set out in the Notice of Grant and with the applicable provisions of the Plan and this Option Agreement .

(b) Method of Exercise. This Option shall be exercisable by delivery of an exercise notice in the form attached as Exhibit A (the "Exercise Notice") which shall state the election to exercise the Option, the number of Shares with respect to which the Option is being exercised, and such other representations and agreements as may be required by the Company. The Exercise Notice shall be accompanied by payment of the aggregate Exercise Price as to all Exercised Shares. This Option shall be deemed to be exercised upon receipt by the Company of such fully executed Exercise Notice accompanied by the aggregate Exercise Price.
No Shares shall be issued pursuant to the exercise of an Option unless such issuance and such exercise complies with Applicable Laws. Assuming such compliance, for income tax purposes the Shares shall be considered transferred to the Optionee on the date on which the Option is exercised with respect to such Shares.

3. Optionee's Representations. In the event the Shares have not been registered under the Securities Act of 1933, as amended, at the time this Option is exercised, the Optionee shall, if required by the Company, concurrently with the exercise of all or any portion of this Option, deliver to the Company his or her Investment Representation Statement in the form attached hereto as Exhibit B.

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4. Method of Payment. Payment of the aggregate Exercise Price shall be by any of the following, or a combination thereof, at the election of the Optionee:

(a) cash or check;

(b) consideration received by the Company under a formal cashless exercise program adopted by the Company in connection with the Plan; or

(c) surrender of other Shares which, (i) in the case of Shares acquired upon exercise of an option, have been owned by the Optionee for more than six (6) months on the date of surrender, and (ii) have a Fair Market Value on the date of surrender equal to the aggregate Exercise Price of the Exercised Shares .

(d) with the Administrator's consent, delivery of Optionee's promissory note (the "Note") in the form attached hereto as Exhibit C, in the amount of the aggregate Exercise Price of the Exercised Shares together with the execution and delivery by the Optionee of the Security Agreement attached hereto as Exhibit D. The Note shall bear interest at the "applicable federal rate" prescribed under the Code and its regulations at time of purchase, and shall be secured by a pledge of the Shares purchased by the Note pursuant to the Security Agreement.

5. Restrictions on Exercise. This Option may not be exercised until such time as the Plan has bee approved by the stockholders of the Company, or if the issuance of such Shares upon such exercise or the method of payment of consideration for such shares would constitute a violation of any Applicable Law.

6. Non-Transferability of Option. This Option may not be transferred in any manner otherwise than by will or by the laws of descent or distribution and may be exercised during the lifetime of Optionee only by Optionee. The terms of the Plan and this Option Agreement shall be binding upon the executors, administrators, heirs, successors and assigns of the Optionee.

7. Term of Option. This Option may be exercised only within the term set out in the Notice of Grant, and may be exercised during such term only in accordance with the Plan and the terms of this Option.

8. Tax Consequences. Set forth below is a brief summary as of the date of this Option of some of the federal tax consequences of exercise of this Option and disposition of the Shares. THIS SUMMARY IS NECESSARILY INCOMPLETE, AND THE TAX LAWS AND REGULATIONS ARE SUBJECT TO CHANGE. THE OPTIONEE SHOULD CONSULT A TAX ADVISER BEFORE EXERCISING THIS OPTION OR DISPOSING OF THE SHARES.

(a) Exercise of ISO. If this Option qualifies as an ISO, there will be no regular federal income tax liability upon the exercise of the Option, although the excess, if any, of the Fair Market Value of the Shares on the date of exercise over the Exercise Price will be treated as an adjustment to the alternative minimum tax for federal tax purposes and may subject the Optionee to the alternative minimum tax in the year of exercise.

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(b) Exercise of Nonstatutory Stock Option. There may be a regular federal income tax liability upon the exercise of a Nonstatutory Stock Option. The Optionee will be treated as having received compensation income (taxable at ordinary income tax rates) equal to the excess, if any, of the Fair Market Value of the Shares on the date of exercise over the Exercise Price. If Optionee is an Employee or a former Employee, the Company will be required to withhold from Optionee's compensation or collect from Optionee and pay to the applicable taxing authorities an amount in cash equal to a percentage of this compensation income at the time of exercise, and may refuse to honor the exercise and refuse to deliver Shares if such withholding amounts are not delivered at the time of exercise.

(c) Disposition of Shares. In the case of an NSO, if Shares are held for at least one year, any gain realized on disposition of the Shares will be treated as long-term capital gain for federal income tax purposes. In the case of an ISO, if Shares transferred pursuant to the Option are held for at least one year after exercise and of at least two years after the Date of Grant, any gain realized on disposition of the Shares will also be treated as long-term capital gain for federal income tax purposes. If Shares purchased under an ISO are disposed of within one year after exercise or two years after the Date of Grant, any gain realized on such disposition will be treated as compensation income (taxable at ordinary income rates) to the extent of the difference between the Exercise Price and the lesser of (1) the Fair Market Value of the Shares on the date of exercise, or (2) the sale price of the Shares. Any additional gain will be taxed as capital gain, short-term or long-term depending on the period that the ISO Shares were held.

(d) Notice of Disqualifying Disposition of ISO Shares. If the Option granted to Optionee herein is an ISO, and if Optionee sells or otherwise disposes of any of the Shares acquired pursuant to the ISO on or before the later of (1) the date two years after the Date of Grant, or (2) the date one year after the date of exercise, the Optionee shall immediately notify the Company in writing of such disposition. Optionee agrees that Optionee may be subject to income tax withholding by the Company on the compensation income recognized by the Optionee.

9. Entire Agreement; Governing Law. The Plan is incorporated herein by reference. The Plan and this Option Agreement constitute the entire agreement of the parties with respect to the subject matter hereof and supersede in their entirety all prior undertakings and agreements of the Company and Optionee with respect to the subject matter hereof, and may not be modified adversely to the Optionee's interest except by means of a writing signed by the Company and Optionee. This agreement is governed by and construed in accordance with the laws of the State of California applicable to contracts entered into and wholly to be performed within the State of California residents.

10. No Guarantee of Continued Service. OPTIONEE ACKNOWLEDGES AND AGREES THAT THE VESTING OF SHARES PURSUANT TO THE VESTING SCHEDULE HEREOF IS EARNED ONLY BY CONTINUING AS A SERVICE PROVIDER AT THE WILL OF THE COMPANY (NOT THROUGH THE ACT OF BEING HIRED, BEING GRANTED THIS OPTION OR ACQUIRING SHARES HEREUNDER). OPTIONEE FURTHER ACKNOWLEDGES AND AGREES THAT THIS AGREEMENT, THE TRANSACTIONS CONTEMPLATED HEREUNDER AND THE VESTING SCHEDULE SET FORTH HEREIN DO NOT CONSTITUTE AN EXPRESS OR IMPLIED PROMISE OF CONTINUED ENGAGEMENT

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AS A SERVICE PROVIDER FOR THE VESTING PERIOD, FOR ANY PERIOD, OR AT ALL, AND SHALL NOT INTERFERE IN ANY WAY WITH OPTIONEE'S RIGHT OR THE COMPANY'S RIGHT TO TERMINATE OPTIONEE'S RELATIONSHIP AS A SERVICE PROVIDER AT ANY TIME, WITH OR WITHOUT CAUSE.

Optionee acknowledges receipt of a copy of the Plan and represents that he or she is familiar with the terms and provisions thereof, and hereby accepts this Option subject to all of the terms and provisions thereof. Optionee has reviewed the Plan and this Option in their entirety, has had an opportunity to obtain the advice of counsel prior to executing this Option and fully understands all provisions of the Option. Optionee hereby agrees to accept as binding, conclusive and final all decisions or interpretations of the Administrator upon any questions arising under the Plan or this Option. Optionee further agrees to notify the Company upon any change in the residence address indicated below.

NATUS MEDICAL INCORPORATED


By


Title

OPTIONEE'S ACCEPTANCE AND ACKNOWLEDGMENT

Dated:____________________             __________________________
                                       Residential Address

__________________________             __________________________
Optionee's Signature                   City, State, Zip Code

__________    I hereby acknowledge that I am not legally married as of the date
              of this Agreement.

__________    I hereby acknowledge that I am legally married as of the date of
              this Agreement and, if applicable, by executing this Agreement, my
              spouse agrees to be bound by all the terms and conditions of this
              Agreement.

__________________________

Spouse's Signature

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SPOUSAL SIGNATURE IS REQUIRED FOR RESIDENTS OF COMMUNITY PROPERTY STATES:
ARIZONA, CALIFORNIA, IDAHO, LOUISIANA, NEVADA, NEW MEXICO, TEXAS, WASHINGTON AND WISCONSIN.

THIS OPTION WILL BECOME EFFECTIVE UPON RECEIPT BY THE COMPANY OF ONE FULLY EXECUTED COPY OF THIS AGREEMENT

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EXHIBIT A

2000 STOCK OPTION PLAN

EXERCISE NOTICE

Natus Medical Incorporated
1501 Industrial Road
San Carlos, CA 94070

Attention: Chief Executive Officer

1. Exercise of Option. Effective as of today, ___________, 20__, the undersigned ("Optionee") hereby elects to exercise Optionee's option to purchase _________ shares of the Common Stock (the "Shares") of Natus Medical Incorporated (the "Company") under and pursuant to the 2000 Stock Option Plan (the "Plan") and the Stock Option Agreement dated ________, 20___ (the "Option Agreement").

2. Delivery of Payment. Purchaser herewith delivers to the Company the full purchase price of the Shares, as set forth in the Option Agreement.

3. Representations of Optionee. Optionee acknowledges that Optionee has received, read and understood the Plan and the Option Agreement and agrees to abide by and be bound by their terms and conditions.

4. Rights as Stockholder. Until the issuance of the Shares (as evidenced by the appropriate entry on the books of the Company or of a duly authorized transfer agent of the Company), no right to vote or receive dividends or any other rights as a stockholder shall exist with respect to the Optioned Stock, notwithstanding the exercise of the Option. The Shares shall be issued to the Optionee as soon as practicable after the Option is exercised. No adjustment shall be made for a dividend or other right for which the record date is prior to the date of issuance except as provided in Section 11 of the Plan.

5. Tax Consultation. Optionee understands that Optionee may suffer adverse tax consequences as a result of Optionee's purchase or disposition of the Shares. Optionee represents that Optionee has consulted with any tax consultants Optionee deems advisable in connection with the purchase or disposition of the Shares and that Optionee is not relying on the Company for any tax advice.

6. Successors and Assigns. The Company may assign any of its rights under this Agreement to single or multiple assignees, and this Agreement shall inure to the benefit of the successors and assigns of the Company. Subject to the restrictions on transfer herein set forth, this Agreement shall be binding upon Optionee and his or her heirs, executors, administrators, successors and assigns.

7. Interpretation. Any dispute regarding the interpretation of this Agreement shall be submitted by Optionee or by the Company forthwith to the Administrator which shall review such dispute at its next regular meeting. The resolution of such a dispute by the Administrator shall be final and binding on all parties.

8. Governing Law; Severability. This Agreement is governed by the internal substantive laws but not the choice of law rules, of Delaware.

9. Entire Agreement. The Plan and Option Agreement are incorporated herein by reference. This Agreement, the Plan, the Option Agreement and the Investment Representation Statement constitute the entire agreement of the parties with respect to the subject matter hereof and supersede in their entirety all prior undertakings and agreements of the Company and Optionee with respect to the subject matter hereof, and may not be modified adversely to the Optionee's interest except by means of a writing signed by the Company and Optionee.

Submitted by:                       Accepted by:

OPTIONEE:                           NATUS MEDICAL INCORPORATED

__________________________          __________________________
Signature                           By

__________________________          __________________________
Print Name                          Its

Address:                            Address:
-------                             -------

__________________________          __________________________

__________________________          __________________________


                                    __________________________

Date Received

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EXHIBIT 10.4

NATUS MEDICAL INCORPORATED

2000 DIRECTOR OPTION PLAN

1. Purposes of the Plan. The purposes of this 2000 Director Option Plan are to attract and retain the best available personnel for service as Outside Directors (as defined herein) of the Company, to provide additional incentive to the Outside Directors of the Company to serve as Directors, and to encourage their continued service on the Board.

All options granted hereunder shall be nonstatutory stock options.

2. Definitions. As used herein, the following definitions shall apply:

(a) "Board" shall mean the Board of Directors of the Company.

(b) "Code" shall mean the Internal Revenue Code of 1986, as amended.

(c) "Common Stock" shall mean the common stock of the Company.

(d) "Company" shall mean Natus Medical Incorporated, a Delaware corporation.

(e) "Director" shall mean a member of the Board.

(f) "Disability" shall mean total and permanent disability as defined in section 22(e)(3) of the Code.

(g) "Employee" shall mean any person, including officers and Directors, employed by the Company or any Parent or Subsidiary of the Company. The payment of a Director's fee by the Company shall not be sufficient in and of itself to constitute "employment" by the Company.

(h) "Exchange Act" shall mean the Securities Exchange Act of 1934, as amended.

(i) "Fair Market Value" shall mean, as of any date, the value of Common Stock determined as follows:

(i) If the Common Stock is listed on any established stock exchange or a national market system, including without limitation the Nasdaq National Market or The Nasdaq SmallCap Market of The Nasdaq Stock Market, its Fair Market Value shall be the closing sales price for such stock (or the closing bid, if no sales were reported) as quoted on such exchange or system for the last market trading day prior to the time of determination as reported in The Wall Street Journal or such other source as the Administrator deems reliable;


(ii) If the Common Stock is regularly quoted by a recognized securities dealer but selling prices are not reported, the Fair Market Value of a Share of Common Stock shall be the mean between the high bid and low asked prices for the Common Stock for the last market trading day prior to the time of determination, as reported in The Wall Street Journal or such other source as the Board deems reliable; or

(iii) In the absence of an established market for the Common Stock, the Fair Market Value thereof shall be determined in good faith by the Board.

(j) "Inside Director" shall mean a Director who is an Employee.

(k) "Option" shall mean a stock option granted pursuant to the Plan.

(l) "Optioned Stock" shall mean the Common Stock subject to an Option.

(m) "Optionee" shall mean a Director who holds an Option.

(n) "Outside Director" shall mean a Director who is not an Employee of the Company.

(o) "Parent" shall mean a "parent corporation," whether now or hereafter existing, as defined in Section 424(e) of the Code.

(p) "Plan" shall mean this 2000 Director Option Plan.

(q) "Share" shall mean a share of the Common Stock, as adjusted in accordance with Section 10 of the Plan but after accounting for the 2-for-5 reverse stock split effected in July 2000.

(r) "Subsidiary" shall mean a "subsidiary corporation," whether now or hereafter existing, as defined in Section 424(f) of the Internal Revenue Code of 1986.

3. Stock Subject to the Plan. Subject to the provisions of Section 10 of the Plan, the maximum aggregate number of Shares which may be optioned and sold under the Plan is 400,000 Shares (post-split) (the "Pool") (the Shares may be authorized, but unissued, or reacquired Common Stock), together with an annual increase to the number of Shares reserved thereunder on the first day of the Company's fiscal year, beginning with January 1, 2002, equal to the lesser of (i) 100,000 Shares (post-split), (ii) one-half of one percent (.5%) of the outstanding Shares of Common Stock on the last day of each prior fiscal year or
(iii) such amount as determined by the Board.

If an Option expires or becomes unexercisable without having been exercised in full, the unpurchased Shares which were subject thereto shall become available for future grant or sale under the Plan (unless the Plan has terminated). Shares that have actually been issued under the Plan shall not be returned to the Plan and shall not become available for future distribution under the Plan.

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4. Administration and Grants of Options under the Plan.

(a) Procedure for Grants. All grants of Options to Outside Directors under this Plan shall be automatic and nondiscretionary and shall be made strictly in accordance with the following provisions:

(i) No person shall have any discretion to select which Outside Directors shall be granted Options or to determine the number of Shares to be covered by Options.

(ii) Each Outside Director shall be automatically granted an Option to purchase Shares (the "First Option") on the date on which the later of the following events occurs: (A) the effective date of this Plan, as determined in accordance with Section 6 hereof; or (B) the date on which such person first becomes an Outside Director, whether through election by the shareholders of the Company or appointment by the Board to fill a vacancy; provided, however, that an Inside Director who ceases to be an Inside Director but who remains a Director shall not receive a First Option. The First Option for an Outside Director who has not previously received a stock option grant from the Company shall be for 30,000 Shares (post-split), and an Outside Director who has previously received a stock option grant from the Company shall not receive a First Option.

(iii) Each Outside Director shall subsequently be automatically granted an Option to purchase Shares (a "Subsequent Option") on the date of the next meeting of the Board following the Annual Meeting of Shareholders in each year commencing with the 2001 Annual Meeting of Shareholders provided he or she is then an Outside Director and if as of such date, he or she shall have served on the Board for at least the preceding six (6) months. The Subsequent Option shall be for 10,000 Shares (post-split).

(iv) Notwithstanding the provisions of subsections (ii) and
(iii) hereof, any exercise of an Option granted before the Company has obtained shareholder approval of the Plan in accordance with Section 16 hereof shall be conditioned upon obtaining such shareholder approval of the Plan in accordance with Section 16 hereof.

(v) The terms of a First Option granted hereunder shall be as follows:

(A) the term of the First Option shall be ten (10) years.

(B) the First Option shall be exercisable only while the Outside Director remains a Director of the Company, except as set forth in Sections 8 and 10 hereof.

(C) the exercise price per Share shall be 100% of the Fair Market Value per Share on the date of grant of the First Option provided, however, that in the case of a First Option granted on the effective date of the Company's initial public offering pursuant to a registration statement filed with the Securities and Exchange Commission, the exercise price per share shall be the initial public offering price per share.

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(D) subject to Section 10 hereof, the First Option shall become exercisable as to 1/36th of the Shares subject to the First Option each month after the date of grant, so that the First Option shall be fully exercisable 3 years after its date of grant, provided that the Optionee continues to serve as a Director on such dates.

(vi) The terms of a Subsequent Option granted hereunder shall be as follows:

(A) the term of the Subsequent Option shall be ten (10)

years.

(B) the Subsequent Option shall be exercisable only while the Outside Director remains a Director of the Company, except as set forth in Sections 8 and 10 hereof.

(C) the exercise price per Share shall be 100% of the Fair Market Value per Share on the date of grant of the Subsequent Option.

(D) subject to Section 10 hereof, the Subsequent Option shall become exercisable cumulatively with respect to 1/12th of the Subsequent Option at the end of each month after the date of grant, so that the Subsequent Option shall be fully exercisable 1 year after its date of grant, provided that the Optionee continues to serve as a Director on such dates.

(vii) In the event that any Option granted under the Plan would cause the number of Shares subject to outstanding Options plus the number of Shares previously purchased under Options to exceed the Pool, then the remaining Shares available for Option grant shall be granted under Options to the Outside Directors on a pro rata basis. No further grants shall be made until such time, if any, as additional Shares become available for grant under the Plan through action of the Board or the shareholders to increase the number of Shares which may be issued under the Plan or through cancellation or expiration of Options previously granted hereunder.

5. Eligibility. Options may be granted only to Outside Directors. All Options shall be automatically granted in accordance with the terms set forth in
Section 4 hereof.

The Plan shall not confer upon any Optionee any right with respect to continuation of service as a Director or nomination to serve as a Director, nor shall it interfere in any way with any rights which the Director or the Company may have to terminate the Director's relationship with the Company at any time.

6. Term of Plan. The Plan shall become effective upon the earlier to occur of its adoption by the Board or its approval by the shareholders of the Company as described in Section 16 of the Plan; provided, however, the Plan shall not become effective until the effective date of the Company's initial public offering pursuant to a registration statement filed with the Securities and Exchange Commission. It shall continue in effect for a term of ten (10) years unless sooner terminated under Section 11 of the Plan.

7. Form of Consideration. The consideration to be paid for the Shares to be issued upon exercise of an Option, including the method of payment, shall consist of (i) cash, (ii) check, (iii) other shares which (x) in the case of Shares acquired upon exercise of an option, have been

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owned by the Optionee for more than six (6) months on the date of surrender, and
(y) have a Fair Market Value on the date of surrender equal to the aggregate exercise price of the Shares as to which said Option shall be exercised, (iv) consideration received by the Company under a cashless exercise program implemented by the Company in connection with the Plan, or (v) any combination of the foregoing methods of payment.

8. Exercise of Option.

(a) Procedure for Exercise; Rights as a Shareholder. Any Option granted hereunder shall be exercisable at such times as are set forth in Section 4 hereof; provided, however, that no Options shall be exercisable until shareholder approval of the Plan in accordance with Section 16 hereof has been obtained.

An Option may not be exercised for a fraction of a Share.

An Option shall be deemed to be exercised when written notice of such exercise has been given to the Company in accordance with the terms of the Option by the person entitled to exercise the Option and full payment for the Shares with respect to which the Option is exercised has been received by the Company. Full payment may consist of any consideration and method of payment allowable under Section 7 of the Plan. Until the issuance (as evidenced by the appropriate entry on the books of the Company or of a duly authorized transfer agent of the Company) of the stock certificate evidencing such Shares, no right to vote or receive dividends or any other rights as a shareholder shall exist with respect to the Optioned Stock, notwithstanding the exercise of the Option. A share certificate for the number of Shares so acquired shall be issued to the Optionee as soon as practicable after exercise of the Option. No adjustment shall be made for a dividend or other right for which the record date is prior to the date the stock certificate is issued, except as provided in Section 10 of the Plan.

Exercise of an Option in any manner shall result in a decrease in the number of Shares which thereafter may be available, both for purposes of the Plan and for sale under the Option, by the number of Shares as to which the Option is exercised.

(b) Termination of Continuous Status as a Director. Subject to Section 10 hereof, in the event an Optionee's status as a Director terminates (other than upon the Optionee's death or Disability), the Optionee may exercise his or her Option, but only within three (3) months following the date of such termination, and only to the extent that the Optionee was entitled to exercise it on the date of such termination (but in no event later than the expiration of its ten (10) year term). To the extent that the Optionee was not entitled to exercise an Option on the date of such termination, and to the extent that the Optionee does not exercise such Option (to the extent otherwise so entitled) within the time specified herein, the Option shall terminate.

(c) Disability of Optionee. In the event Optionee's status as a Director terminates as a result of Disability, the Optionee may exercise his or her Option, but only within twelve (12) months following the date of such termination, and only to the extent that the Optionee was entitled to exercise it on the date of such termination (but in no event later than the expiration of its ten (10) year term). To the extent that the Optionee was not entitled to exercise an Option on the date of

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termination, or if he or she does not exercise such Option (to the extent otherwise so entitled) within the time specified herein, the Option shall terminate.

(d) Death of Optionee. In the event of an Optionee's death, the Optionee's estate or a person who acquired the right to exercise the Option by bequest or inheritance may exercise the Option, but only within twelve (12) months following the date of death, and only to the extent that the Optionee was entitled to exercise it on the date of death (but in no event later than the expiration of its ten (10) year term). To the extent that the Optionee was not entitled to exercise an Option on the date of death, and to the extent that the Optionee's estate or a person who acquired the right to exercise such Option does not exercise such Option (to the extent otherwise so entitled) within the time specified herein, the Option shall terminate.

9. Non-Transferability of Options. The Option may not be sold, pledged, assigned, hypothecated, transferred, or disposed of in any manner other than by will or by the laws of descent or distribution and may be exercised, during the lifetime of the Optionee, only by the Optionee.

10. Adjustments Upon Changes in Capitalization, Dissolution, Merger or
Asset Sale.

(a) Changes in Capitalization. Subject to any required action by the shareholders of the Company, the number of Shares covered by each outstanding Option, the number of Shares which have been authorized for issuance under the Plan but as to which no Options have yet been granted or which have been returned to the Plan upon cancellation or expiration of an Option, as well as the price per Share covered by each such outstanding Option, and the number of Shares issuable pursuant to the automatic grant provisions of Section 4 hereof shall be proportionately adjusted for any increase or decrease in the number of issued Shares resulting from a stock split, reverse stock split, stock dividend, combination or reclassification of the Common Stock, or any other increase or decrease in the number of issued Shares effected without receipt of consideration by the Company; provided, however, that conversion of any convertible securities of the Company shall not be deemed to have been "effected without receipt of consideration." Except as expressly provided herein, no issuance by the Company of shares of stock of any class, or securities convertible into shares of stock of any class, shall affect, and no adjustment by reason thereof shall be made with respect to, the number or price of Shares subject to an Option.

(b) Dissolution or Liquidation. In the event of the proposed dissolution or liquidation of the Company, to the extent that an Option has not been previously exercised, it shall terminate immediately prior to the consummation of such proposed action.

(c) Merger or Asset Sale. In the event of a merger of the Company with or into another corporation or the sale of substantially all of the assets of the Company, outstanding Options may be assumed or equivalent options may be substituted by the successor corporation or a Parent or Subsidiary thereof (the "Successor Corporation"). If an Option is assumed or substituted for, the Option or equivalent option shall continue to be exercisable as provided in Section 4 hereof for so long as the Optionee serves as a Director or a director of the Successor Corporation. Following such assumption or substitution, if the Optionee's status as a Director or director of the Successor Corporation, as applicable, is terminated other than upon a voluntary resignation by the Optionee, the Option or option shall become fully exercisable, including as to Shares for which it would not

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otherwise be exercisable. Thereafter, the Option or option shall remain exercisable in accordance with Sections 8(b) through (d) above.

If the Successor Corporation does not assume an outstanding Option or substitute for it an equivalent option, the Option shall become fully vested and exercisable, including as to Shares for which it would not otherwise be exercisable. In such event the Board shall notify the Optionee that the Option shall be fully exercisable for a period of fifteen (15) days from the date of such notice, and upon the expiration of such period the Option shall terminate.

For the purposes of this Section 10(c), an Option shall be considered assumed if, following the merger or sale of assets, the Option confers the right to purchase or receive, for each Share of Optioned Stock subject to the Option immediately prior to the merger or sale of assets, the consideration (whether stock, cash, or other securities or property) received in the merger or sale of assets by holders of Common Stock for each Share held on the effective date of the transaction (and if holders were offered a choice of consideration, the type of consideration chosen by the holders of a majority of the outstanding Shares). If such consideration received in the merger or sale of assets is not solely common stock of the successor corporation or its Parent, the Administrator may, with the consent of the successor corporation, provide for the consideration to be received upon the exercise of the Option, for each Share of Optioned Stock subject to the Option, to be solely common stock of the successor corporation or its Parent equal in fair market value to the per share consideration received by holders of Common Stock in the merger or sale of assets.

11. Amendment and Termination of the Plan.

(a) Amendment and Termination. The Board may at any time amend, alter, or discontinuation shall be made which would impair the rights of any Optionee under any grant theretofore made, without his or her consent. In addition, to the extent necessary and desirable to comply with any applicable law, regulation or stock exchange rule, the Company shall obtain shareholder approval of any Plan amendment in such a manner and to such a degree as required.

(b) Effect of Amendment or Termination. Any such amendment or termination of the Plan shall not affect Options already granted and such Options shall remain in full force and effect as if this Plan had not been amended or terminated.

12. Time of Granting Options. The date of grant of an Option shall, for all purposes, be the date determined in accordance with Section 4 hereof.

13. Conditions Upon Issuance of Shares. Shares shall not be issued pursuant to the exercise of an Option unless the exercise of such Option and the issuance and delivery of such Shares pursuant thereto shall comply with all relevant provisions of law, including, without limitation, the Securities Act of 1933, as amended, the Exchange Act, the rules and regulations promulgated thereunder, state securities laws, and the requirements of any stock exchange upon which the Shares may then be listed, and shall be further subject to the approval of counsel for the Company with respect to such compliance.

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As a condition to the exercise of an Option, the Company may require the person exercising such Option to represent and warrant at the time of any such exercise that the Shares are being purchased only for investment and without any present intention to sell or distribute such Shares, if, in the opinion of counsel for the Company, such a representation is required by any of the aforementioned relevant provisions of law.

Inability of the Company to obtain authority from any regulatory body having jurisdiction, which authority is deemed by the Company's counsel to be necessary to the lawful issuance and sale of any Shares hereunder, shall relieve the Company of any liability in respect of the failure to issue or sell such Shares as to which such requisite authority shall not have been obtained.

14. Reservation of Shares. The Company, during the term of this Plan, will at all times reserve and keep available such number of Shares as shall be sufficient to satisfy the requirements of the Plan.

15. Option Agreement. Options shall be evidenced by written option agreements in such form as the Board shall approve.

16. Shareholder Approval. The Plan shall be subject to approval by the shareholders of the Company within twelve (12) months after the date the Plan is adopted. Such shareholder approval shall be obtained in the degree and manner required under applicable state and federal law and any stock exchange rules.

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EXHIBIT 10.4.1

NATUS MEDICAL INCORPORATED

DIRECTOR OPTION AGREEMENT

Natus Medical Incorporated (the "Company"), has granted to ___________________ (the "Optionee"), an option to purchase a total of
[__________ (____)] shares of the Company's Common Stock (the "Optioned Stock"), at the price determined as provided herein, and in all respects subject to the terms, definitions and provisions of the Company's 2000 Director Option Plan (the "Plan") adopted by the Company which is incorporated herein by reference. The terms defined in the Plan shall have the same defined meanings herein.

1. Nature of the Option. This Option is a nonstatutory option and is not intended to qualify for any special tax benefits to the Optionee.

2. Exercise Price. The exercise price is $_______ for each share of Common Stock.

3. Exercise of Option. This Option shall be exercisable during its term in accordance with the provisions of Section 8 of the Plan as follows:

(i) Right to Exercise.

(a) This Option shall become exercisable in installments cumulatively with respect to of the Optioned Stock each month after the date of grant, so that one hundred percent (100%) of the Optioned Stock shall be exercisable ____________ year[s] after the date of grant; provided, however, that in no event shall any Option be exercisable prior to the date the stockholders of the Company approve the Plan.

(b) This Option may not be exercised for a fraction of a share.

(c) In the event of Optionee's death, disability or other termination of service as a Director, the exercisability of the Option is governed by Section 8 of the Plan.

(ii) Method of Exercise. This Option shall be exercisable by written notice which shall state the election to exercise the Option and the number of Shares in respect of which the Option is being exercised. Such written notice, in the form attached hereto as Exhibit A, shall be signed by the Optionee and shall be delivered in person or by certified mail to the Secretary of the Company. The written notice shall be accompanied by payment of the exercise price.

4. Method of Payment. Payment of the exercise price shall be by any of the following, or a combination thereof, at the election of the Optionee:

(i) cash;

(ii) check; or


(iii) surrender of other shares which (x) in the case of Shares acquired upon exercise of an Option, have been owned by the Optionee for more than six (6) months on the date of surrender, and (y) have a Fair Market Value on the date of surrender equal to the aggregate exercise price of the Shares as to which said Option shall be exercised; or

(iv) delivery of a properly executed exercise notice together with such other documentation as the Company and the broker, if applicable, shall require to effect an exercise of the Option and delivery to the Company of the sale or loan proceeds required to pay the exercise price.

5. Restrictions on Exercise. This Option may not be exercised if the issuance of such Shares upon such exercise or the method of payment of consideration for such shares would constitute a violation of any applicable federal or state securities or other law or regulations, or if such issuance would not comply with the requirements of any stock exchange upon which the Shares may then be listed. As a condition to the exercise of this Option, the Company may require Optionee to make any representation and warranty to the Company as may be required by any applicable law or regulation.

6. Non-Transferability of Option. This Option may not be transferred in any manner otherwise than by will or by the laws of descent or distribution and may be exercised during the lifetime of Optionee only by the Optionee. The terms of this Option shall be binding upon the executors, administrators, heirs, successors and assigns of the Optionee.

7. Term of Option. This Option may not be exercised more than ten (10) years from the date of grant of this Option, and may be exercised during such period only in accordance with the Plan and the terms of this Option.

8. Taxation Upon Exercise of Option. Optionee understands that, upon exercise of this Option, he or she will recognize income for tax purposes in an amount equal to the excess of the then Fair Market Value of the Shares purchased over the exercise price paid for such Shares. Since the Optionee is subject to
Section 16(b) of the Securities Exchange Act of 1934, as amended, under certain limited circumstances the measurement and timing of such income (and the commencement of any capital gain holding period) may be deferred, and the Optionee is advised to contact a tax advisor concerning the application of
Section 83 in general and the availability a Section 83(b) election in particular in connection with the exercise of the Option. Upon a resale of such Shares by the Optionee, any difference between the sale price and the Fair Market Value of the Shares on the

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date of exercise of the Option, to the extent not included in income as described above, will be treated as capital gain or loss.

DATE OF GRANT: ______________

Natus Medical Incorporated.,
a Delaware corporation

By:___________________________________

Optionee acknowledges receipt of a copy of the Plan, a copy of which is attached hereto, and represents that he or she is familiar with the terms and provisions thereof, and hereby accepts this Option subject to all of the terms and provisions thereof. Optionee hereby agrees to accept as binding, conclusive and final all decisions or interpretations of the Board upon any questions arising under the Plan.

Dated: _________________


Optionee

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EXHIBIT A

DIRECTOR OPTION EXERCISE NOTICE

Natus Medical Incorporated
1501 Industrial Road
San Carlos, CA 94070

Attention: Corporate Secretary

1. Exercise of Option. The undersigned ("Optionee") hereby elects to exercise Optionee's option to purchase ______ shares of the Common Stock (the "Shares") of Natus Medical Incorporated (the "Company") under and pursuant to the Company's 2000 Director Option Plan and the Director Option Agreement dated _______________ (the "Agreement").

2. Representations of Optionee. Optionee acknowledges that Optionee has received, read and understood the Agreement.

3. Federal Restrictions on Transfer. Optionee understands that the Shares must be held indefinitely unless they are registered under the Securities Act of 1933, as amended (the "1933 Act"), or unless an exemption from such registration is available, and that the certificate(s) representing the Shares may bear a legend to that effect. Optionee understands that the Company is under no obligation to register the Shares and that an exemption may not be available or may not permit Optionee to transfer Shares in the amounts or at the times proposed by Optionee.

4. Tax Consequences. Optionee understands that Optionee may suffer adverse tax consequences as a result of Optionee's purchase or disposition of the Shares. Optionee represents that Optionee has consulted with any tax consultant(s) Optionee deems advisable in connection with the purchase or disposition of the Shares and that Optionee is not relying on the Company for any tax advice.

5. Delivery of Payment. Optionee herewith delivers to the Company the aggregate purchase price for the Shares that Optionee has elected to purchase and has made provision for the payment of any federal or state withholding taxes required to be paid or withheld by the Company.

6. Entire Agreement. The Agreement is incorporated herein by reference. This Exercise Notice and the Agreement constitute the entire agreement of the parties and supersede in their entirety all prior undertakings and agreements of the Company and Optionee with respect to the

subject matter hereof. This Exercise Notice and the Agreement are governed by California law except for that body of law pertaining to conflict of laws.

Submitted by:                     Accepted by:

OPTIONEE:                         Natus Medical Incorporated


By:_______________________        By:_____________________________

                                  Its:____________________________

Address:


Dated:____________________        Dated: _________________________

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EXHIBIT 10.5

NATUS MEDICAL INCORPORATED

2000 EMPLOYEE STOCK PURCHASE PLAN

(As amended effective August 15, 2000)

The following constitute the provisions of the 2000 Employee Stock Purchase Plan of Natus Medical Incorporated.

1. Purpose. The purpose of the Plan is to provide employees of the Company and its Designated Subsidiaries with an opportunity to purchase Common Stock of the Company through accumulated payroll deductions. It is the intention of the Company to have the Plan qualify as an "Employee Stock Purchase Plan" under Section 423 of the Internal Revenue Code of 1986, as amended. The provisions of the Plan, accordingly, shall be construed so as to extend and limit participation in a manner consistent with the requirements of that section of the Code.

2. Definitions.

(a) "Board" shall mean the Board of Directors of the Company or any committee thereof designated by the Board of Directors of the Company in accordance with Section 14 of the Plan.

(b) "Code" shall mean the Internal Revenue Code of 1986, as amended.

(c) "Common Stock" shall mean the common stock of the Company.

(d) "Company" shall mean Natus Medical Incorporated and any Designated Subsidiary of the Company.

(e) "Compensation" shall mean all cash compensation reportable on Form W-2, including, without limitation, base straight time gross earnings, sales commissions, payments for overtime, shift premiums, incentive compensation, incentive payments and bonuses, plus any amounts contributed by the Employee to the Company's 401(k) Plan from compensation paid to the Employee by the Company.

(f) "Designated Subsidiary" shall mean any Subsidiary that has been designated by the Board from time to time in its sole discretion as eligible participate in the Plan.

(g) "Employee" shall mean any individual who is an Employee of the Company for tax purposes whose customary employment with the Company is at least thirty (30) hours per week and more than five (5) months in any calendar year. For purposes of the Plan, the employment relationship shall be treated as continuing intact while the individual is on sick leave or other leave of absence approved by the Company. Where the period of leave exceeds 90 days and the individual's right to reemployment is not guaranteed either by statute or by contract, the employment relationship shall be deemed to have terminated on the 91st day of such leave.

(h) "Enrollment Date" shall mean the first Trading Day of each Offering Period.

(i) "Exercise Date" shall mean the last Trading Day of each Purchase Period.

(j) "Fair Market Value" shall mean, as of any date, the value of Common Stock determined as follows:

(i) If the Common Stock is listed on any established stock exchange or a national market system, including, without limitation, the Nasdaq National Market or The Nasdaq SmallCap Market of The Nasdaq Stock Market, its Fair Market Value shall be the closing sales price for such stock (or the closing bid, if no sales were reported) as quoted on such exchange or system for the last market trading day prior to the date of determination, as reported in The Wall Street Journal or such other source as the Board deems reliable;

(ii) If the Common Stock is regularly quoted by a recognized securities dealer but selling prices are not reported, its Fair Market Value shall be the mean of the closing bid and asked prices for the Common Stock prior to the date of determination, as reported in The Wall Street Journal or such other source as the Board deems reliable;

(iii) In the absence of an established market for the Common Stock, the Fair Market Value thereof shall be determined in good faith by the Board; or

(iv) For purposes of the Enrollment Date of the first Offering Period under the Plan, the Fair Market Value shall be the initial price to the public as set forth in the final prospectus included within the registration statement in Form S-1 filed with the Securities and Exchange Commission for the initial public offering of the Company's Common Stock (the "Registration Statement").

(k) "Offering Periods" shall mean the periods of approximately twenty-four (24) months during which an option granted pursuant to the Plan may be exercised, commencing on the first Trading Day on or after May 1 and November 1 of each year and terminating on the last Trading Day in the periods ending twenty-four months later; provided, however, that the first Offering Period under the Plan shall commence with the first Trading Day on or after the date on which the Securities and Exchange Commission declares the Company's Registration Statement effective and ending on the last Trading Day on or before October 31, 2002. The duration and timing of Offering Periods may be changed pursuant to
Section 4 of this Plan.

(l) "Plan" shall mean this 2000 Employee Stock Purchase Plan.

(m) "Purchase Period" shall mean the approximately six month period commencing after one Exercise Date and ending with the next Exercise Date, except that the first Purchase Period of any Offering Period shall commence on the Enrollment Date and end with the next Exercise Date; provided, however, that the first Purchase Period shall continue until April 30, 2001 in the event that the Enrollment Date falls on or before October 31, 2000.

(n) "Purchase Price" shall mean 85% of the Fair Market Value of a share of Common Stock on the Enrollment Date or on the Exercise Date, whichever is lower; provided, however, that the Purchase Price may be adjusted by the Board pursuant to Section 20.

(o) "Reserves" shall mean the number of shares of Common Stock covered by each option under the Plan which have not yet been exercised and the number of shares of Common Stock which have been authorized for issuance under the Plan but not yet placed under option.

(p) "Subsidiary" shall mean a corporation, domestic or foreign, of which not less than 50% of the voting shares are held by the Company or a Subsidiary, whether or not such corporation now exists or is hereafter organized or acquired by the Company or a Subsidiary.

(q) "Trading Day" shall mean a day on which national stock exchanges and theNasdaq System are open for trading.

3. Eligibility.
(a) Any Employee (as defined in Section 2(g)) who shall be employed by the Company on a given Enrollment Date shall be eligible to participate in the Plan.

(b) Any provisions of the Plan to the contrary notwithstanding, no Employee shall be granted an option under the Plan (i) to the extent that, immediately after the grant, such Employee (or any other person whose stock would be attributed to such Employee pursuant to Section 424(d) of the Code) would own capital stock of the Company and/or hold outstanding options to purchase such stock possessing five percent (5%) or more of the total combined voting power or value of all classes of the capital stock of the Company or of any Subsidiary or (ii) to the extent that his or her rights to purchase stock under all employee stock purchase plans of the Company and its subsidiaries accrues at a rate which exceeds Twenty-five Thousand Dollars ($25,000) worth of stock (determined at the fair market value of the shares at the time such option is granted) for each calendar year in which such option is outstanding at any time.

4. Offering Periods. The Plan shall be implemented by consecutive, overlapping Offering Periods with a new Offering Period commencing on the first Trading Day on or after May 1 and November 1 each year, or on such other date as the Board shall determine, and continuing thereafter until terminated in accordance with Section 20 hereof; provided, however, that the first Offering Period under the Plan shall commence with the first Trading Day on or after the date on which the Securities and Exchange Commission declares the Company's Registration Statement effective and ending on the last Trading Day on or before October 31, 2002. The Board shall have the power to change the duration of Offering Periods (including the commencement dates thereof) with respect to future offerings without stockholder approval if such change is announced at least five (5) days prior to the scheduled beginning of the first Offering Period to be affected thereafter.

5. Participation.

(a) An eligible Employee may become a participant in the Plan by completing a subscription agreement authorizing payroll deductions in the form of Exhibit A to this Plan and filing it with the Company's payroll office prior to the applicable Enrollment Date. All eligible Employees shall be automatically enrolled in the initial Offering Period under the Plan.

(b) Payroll deductions for a participant shall commence on the first payroll following the Enrollment Date and shall end on the last payroll in the Offering Period to which such authorization is applicable, unless sooner terminated by the participant as provided in Section 10 hereof.


6. Payroll Deductions.

(a) At the time a participant files his or her subscription agreement, he or she shall elect to have payroll deductions made on each pay day during the Offering Period in an amount not exceeding fifteen percent (15%) of the Compensation which he or she receives on each pay day during the Offering Period. During the initial Purchase Period, no payroll deduction will be made unless a participant files a supplemental enrollment form within 15 days after written notice to participants of the effectiveness of a registration statement covering the Common Stock and filed under the Securities Act of 1933, as amended.

(b) All payroll deductions made for a participant shall be credited to his or her account under the Plan and shall be withheld in whole percentages only. A participant may not make any additional payments into such account; provided, however, that in the initial Purchase Period, participants may also purchase shares of stock by making a lump sum cash payment at the end of the Purchase Period.

(c) A participant may discontinue his or her participation in the Plan as provided in Section 10 hereof, or may increase or decrease the rate of his or her payroll deductions during the Offering Period by completing or filing with the Company a new subscription agreement authorizing a change in payroll deduction rate. The Board may, in its discretion, limit the number of participation rate changes during any Offering Period, including allowing such changes only at the beginning of each Purchase Period. The change in rate shall be effective with the first full payroll period following five (5) business days after the Company's receipt of the new subscription agreement unless the Company elects to process a given change in participation more quickly. A participant's subscription agreement shall remain in effect for successive Offering Periods unless terminated as provided in Section 10 hereof.

(d) Notwithstanding the foregoing, to the extent necessary to comply with Section 423(b)(8) of the Code and Section 3(b) hereof, a participant's payroll deductions may be decreased to zero percent (0%) at any time during a Purchase Period. Payroll deductions shall recommence at the rate provided in such participant's subscription agreement at the beginning of the first Purchase Period which is scheduled to end in the following calendar year, unless terminated by the participant as provided in Section 10 hereof.

(e) At the time the option is exercised, in whole or in part, or at the time some or all of the Company's Common Stock issued under the Plan is disposed of, the participant must make adequate provision for the Company's federal, state, or other tax withholding obligations, if any, which arise upon the exercise of the option or the disposition of the Common Stock. At any time, the Company may, but shall not be obligated to, withhold from the participant's compensation the amount necessary for the Company to meet applicable withholding obligations, including any withholding required to make available to the Company any tax deductions or benefits attributable to sale or early disposition of Common Stock by the Employee.

7. Grant of Option. On the Enrollment Date of each Offering Period, each eligible Employee participating in such Offering Period shall be granted an option to purchase on each Exercise Date during such Offering Period (at the applicable Purchase Price) up to a number of shares of the Company's Common Stock determined by dividing such Employee's payroll deductions accumulated prior to such Exercise Date and retained in the Participant's account as of the Exercise Date by the applicable Purchase Price; provided that in no event shall an Employee be permitted to purchase during each Purchase Period more than a number of shares determined by dividing $12,500 by the Fair Market Value of a share of the Company's Common Stock (subject to any adjustment pursuant to
Section 19) on the Enrollment Date, and provided further that such

purchase shall be subject to the limitations set forth in Sections 3(b) and 11 hereof. The Board may, for future Offering Periods, increase or decrease, in its absolute discretion, the maximum number of shares of the Company's Common Stock an Employee may purchase during each Purchase Period of such Offering Period. Exercise of the option shall occur as provided in Section 8 hereof, unless the participant has withdrawn pursuant to Section 10 hereof. The option shall expire on the last day of the Offering Period.

8. Exercise of Option.

(a) Unless a participant withdraws from the Plan as provided in
Section 10 hereof, his or her option for the purchase of shares shall be exercised automatically on the Exercise Date, and the maximum number of full shares subject to option shall be purchased for such participant at the applicable Purchase Price with the accumulated payroll deductions in his or her account. No fractional shares shall be purchased; any payroll deductions accumulated in a participant's account which are not sufficient to purchase a full share shall be retained in the participant's account for the subsequent Purchase Period or Offering Period, subject to earlier withdrawal by the participant as provided in Section 10 hereof. Any other monies left over in a participant's account after the Exercise Date shall be returned to the participant. During a participant's lifetime, a participant's option to purchase shares hereunder is exercisable only by him or her.

(b) If the Board determines that, on a given Exercise Date, the number of shares with respect to which options are to be exercised may exceed
(i) the number of shares of Common Stock that were available for sale under the Plan on the Enrollment Date of the applicable Offering Period, or (ii) the number of shares available for sale under the Plan on such Exercise Date, the Board may in its sole discretion (x) provide that the Company shall make a pro rata allocation of the shares of Common Stock available for purchase on such Enrollment Date or Exercise Date, as applicable, in as uniform a manner as shall be practicable and as it shall determine in its sole discretion to be equitable among all participants exercising options to purchase Common Stock on such Exercise Date, and continue all Offering Periods then in effect, or (y) provide that the Company shall make a pro rata allocation of the shares available for purchase on such Enrollment Date or Exercise Date, as applicable, in as uniform a manner as shall be practicable and as it shall determine in its sole discretion to be equitable among all participants exercising options to purchase Common Stock on such Exercise Date, and terminate any or all Offering Periods then in effect pursuant to Section 20 hereof. The Company may make pro rata allocation of the shares available on the Enrollment Date of any applicable Offering Period pursuant to the preceding sentence, notwithstanding any authorization of additional shares for issuance under the Plan by the Company's stockholders subsequent to such Enrollment Date.

9. Delivery. As promptly as practicable after each Exercise Date on which a purchase of shares occurs, the Company shall arrange the delivery to each participant, as appropriate, of a certificate representing the shares purchased upon exercise of his or her option.

10. Withdrawal.

(a) A participant may withdraw all but not less than all the payroll deductions credited to his or her account and not yet used to exercise his or her option under the Plan, at any time by giving written notice to the Company in the form of Exhibit B to this Plan, provided, however, that in the initial Offering Period, participants may be deemed to withdraw from the Plan by declining or failing to send timely payment for the shares. All of the participant's payroll deductions credited to his or her account shall be paid to such participant promptly after receipt of notice of withdrawal and such participant's option for the Offering Period shall be automatically terminated, and no further payroll deductions for the purchase of shares shall be made for such Offering Period. If a participant withdraws from an Offering Period, payroll deductions shall not resume at the beginning of the succeeding Offering Period unless the participant delivers to the Company a new subscription agreement.

(b) A participant's withdrawal from an Offering Period shall not have any effect upon his or her eligibility to participate in any similar plan which may hereafter be adopted by the Company or in succeeding Offering Periods which commence after the termination of the Offering Period from which the participant withdraws.

11. Termination of Employment. Upon a participant's ceasing to be an Employee, for any reason, he or she shall be deemed to have elected to withdraw from the Plan and the payroll deductions credited to such participant's account during the Offering Period but not yet used to exercise the option shall be returned to such participant or, in the case of his or her death, to the person or persons entitled thereto under Section 15 hereof, and such participant's option shall be automatically terminated. The preceding sentence notwithstanding, a participant who receives payment in lieu of notice of termination of employment shall be treated as continuing to be an Employee for the participant's customary number of hours per week of employment during the period in which the participant is subject to such payment in lieu of notice.

12. Interest. No interest shall accrue on the payroll deductions of a participant in the Plan.

13. Stock.

(a) Subject to adjustment upon changes in capitalization of the Company as provided in Section 19 hereof and as adjusted for the July 2000 two- for-five reverse split, the maximum number of shares of the Company's Common Stock which shall be made available for sale under the Plan shall be 1,000,000 shares (post-split) together with an annual increase to the number of shares reserved for issuance thereunder on the first day of the Company's fiscal year beginning in January 1, 2002, equal to the lesser of (i) 650,000 shares (post- split), (ii) four percent percent (4%) of the outstanding shares of the Company on the last day of the prior fiscal year or (iii) such amount as determined by the Board.

(b) The participant shall have no interest or voting right in shares covered by his option until such option has been exercised.

(c) Shares to be delivered to a participant under the Plan shall be registered in the name of the participant or in the name of the participant and his or her spouse.


14. Administration. The Plan shall be administered by the Board or a committee of members of the Board appointed by the Board. The Board or its committee shall have full and exclusive discretionary authority to construe, interpret and apply the terms of the Plan, to determine eligibility and to adjudicate all disputed claims filed under the Plan. Every finding, decision and determination made by the Board or its committee shall, to the full extent permitted by law, be final and binding upon all parties.

15. Designation of Beneficiary.

(a) A participant may file a written designation of a beneficiary who is to receive any shares and cash, if any, from the participant's account under the Plan in the event of such participant's death subsequent to an Exercise Date on which the option is exercised but prior to delivery to such participant of such shares and cash. In addition, a participant may file a written designation of a beneficiary who is to receive any cash from the participant's account under the Plan in the event of such participant's death prior to exercise of the option. If a participant is married and the designated beneficiary is not the spouse, spousal consent shall be required for such designation to be effective.

(b) Such designation of beneficiary may be changed by the participant at any time by written notice. In the event of the death of a participant and in the absence of a beneficiary validly designated under the Plan who is living at the time of such participant's death, the Company shall deliver such shares and/or cash to the executor or administrator of the estate of the participant, or if no such executor or administrator has been appointed (to the knowledge of the Company), the Company, in its discretion, may deliver such shares and/or cash to the spouse or to any one or more dependents or relatives of the participant, or if no spouse, dependent or relative is known to the Company, then to such other person as the Company may designate.

16. Transferability. Neither payroll deductions credited to a participant's account nor any rights with regard to the exercise of an option or to receive shares under the Plan may be assigned, transferred, pledged or otherwise disposed of in any way (other than by will, the laws of descent and distribution or as provided in Section 15 hereof) by the participant. Any such attempt at assignment, transfer, pledge or other disposition shall be without effect, except that the Company may treat such act as an election to withdraw funds from an Offering Period in accordance with Section 10 hereof.

17. Use of Funds. All payroll deductions received or held by the Company under the Plan may be used by the Company for any corporate purpose, and the Company shall not be obligated to segregate such payroll deductions.

18. Reports. Individual accounts shall be maintained for each participant in the Plan. Statements of account shall be given to participating Employees at least annually, which statements shall set forth the amounts of payroll deductions, the Purchase Price, the number of shares purchased and the remaining cash balance, if any.

19. Adjustments Upon Changes in Capitalization, Dissolution, Liquidation,

Merger or Asset Sale.

(a) Changes in Capitalization. Subject to any required action by the stockholders of the Company, the Reserves, the maximum number of shares each participant may purchase each Purchase Period (pursuant to Section 7), as well as the price per share and the number of shares of Common Stock covered by each option under the Plan which has not yet been exercised shall be proportionately adjusted for any increase or decrease in the number of issued shares of Common Stock resulting from a stock split, reverse stock split, stock dividend, combination or reclassification of the Common Stock, or any other increase or decrease in the number of shares of Common Stock effected without receipt of consideration by the Company; provided, however, that conversion of any convertible securities of the Company shall not be deemed to have been "effected without receipt of consideration." Such adjustment shall be made by the Board, whose determination in that respect shall be final, binding and conclusive. Except as expressly provided herein, no issuance by the Company of shares of stock of any class, or securities convertible into shares of stock of any class, shall affect, and no adjustment by reason thereof shall be made with respect to, the number or price of shares of Common Stock subject to an option.

(b) Dissolution or Liquidation. In the event of the proposed dissolution or liquidation of the Company, the Offering Period then in progress shall be shortened by setting a new Exercise Date (the "New Exercise Date"), and shall terminate immediately prior to the consummation of such proposed dissolution or liquidation, unless provided otherwise by the Board. The New Exercise Date shall be before the date of the Company's proposed dissolution or liquidation. The Board shall notify each participant in writing, at least ten (10) business days prior to the New Exercise Date, that the Exercise Date for the participant's option has been changed to the New Exercise Date and that the participant's option shall be exercised automatically on the New Exercise Date, unless prior to such date the participant has withdrawn from the Offering Period as provided in Section 10 hereof.

(c) Merger or Asset Sale. In the event of a proposed sale of all or substantially all of the assets of the Company, or the merger of the Company with or into another corporation, each outstanding option shall be assumed or an equivalent option substituted by the successor corporation or a Parent or Subsidiary of the successor corporation. In the event that the successor corporation refuses to assume or substitute for the option, any Purchase Periods then in progress shall be shortened by setting a new Exercise Date (the "New Exercise Date") and any Offering Periods then in progress shall end on the New Exercise Date. The New Exercise Date shall be before the date of the Company's proposed sale or merger. The Board shall notify each participant in writing, at least ten (10) business days prior to the New Exercise Date, that the Exercise Date for the participant's option has been changed to the New Exercise Date and that the participant's option shall be exercised automatically on the New Exercise Date, unless prior to such date the participant has withdrawn from the Offering Period as provided in Section 10 hereof.

20. Amendment or Termination.

(a) The Board of Directors of the Company may at any time and for any reason terminate or amend the Plan. Except as provided in Section 19 hereof, no such termination can affect options previously granted, provided that an Offering Period may be terminated by the Board


of Directors on any Exercise Date if the Board determines that the termination of the Offering Period or the Plan is in the best interests of the Company and its stockholders. Except as provided in Section 19 and this Section 20 hereof, no amendment may make any change in any option theretofore granted which adversely affects the rights of any participant. To the extent necessary to comply with Section 423 of the Code (or any successor rule or provision or any other applicable law, regulation or stock exchange rule), the Company shall obtain stockholder approval in such a manner and to such a degree as required.

(b) Without stockholder consent and without regard to whether any participant rights may be considered to have been "adversely affected," the Board (or its committee) shall be entitled to change the Offering Periods, limit the frequency and/or number of changes in the amount withheld during an Offering Period, establish the exchange ratio applicable to amounts withheld in a currency other than U.S. dollars, permit payroll withholding in excess of the amount designated by a participant in order to adjust for delays or mistakes in the Company's processing of properly completed withholding elections, establish reasonable waiting and adjustment periods and/or accounting and crediting procedures to ensure that amounts applied toward the purchase of Common Stock for each participant properly correspond with amounts withheld from the participant's Compensation, and establish such other limitations or procedures as the Board (or its committee) determines in its sole discretion advisable which are consistent with the Plan.

(c) In the event the Board determines that the ongoing operation of the Plan may result in unfavorable financial accounting consequences, the Board may, in its discretion and, to the extent necessary or desirable, modify or amend the Plan to reduce or eliminate such accounting consequence including, but not limited to:

(i) altering the Purchase Price for any Offering Period including an Offering Period underway at the time of the change in Purchase Price;

(ii) shortening any Offering Period so that Offering Period ends on a new Exercise Date, including an Offering Period underway at the time of the Board action; and

(iii) allocating shares.

Such modifications or amendments shall not require stockholder approval or the consent of any Plan participants.

21. Notices. All notices or other communications by a participant to the Company under or in connection with the Plan shall be deemed to have been duly given when received in the form specified by the Company at the location, or by the person, designated by the Company for the receipt thereof.

22. Conditions Upon Issuance of Shares. Shares shall not be issued with respect to an option unless the exercise of such option and the issuance and delivery of such shares pursuant thereto shall comply with all applicable provisions of law, domestic or foreign, including, without limitation, the Securities Act of 1933, as amended, the Securities Exchange Act of 1934, as amended, the rules and regulations promulgated thereunder, and the requirements of any stock exchange upon which the shares may then be listed, and shall be further subject to the approval of counsel for the Company with respect to such compliance.

As a condition to the exercise of an option, the Company may require the person exercising such option to represent and warrant at the time of any such exercise that the shares are being purchased only for investment and without any present intention to sell or distribute such shares if, in the opinion of counsel for the Company, such a representation is required by any of the aforementioned applicable provisions of law.

23. Term of Plan. The Plan shall become effective upon the earlier to occur of its adoption by the Board of Directors or its approval by the stockholders of the Company; provided, however, the Plan shall not become effective until the effective date of the Company's initial public offering pursuant to a registration statement filed with the Securities and Exchange Commission. It shall continue in effect for a term of ten (10) years unless sooner terminated under Section 20 hereof.

24. Automatic Transfer to Low Price Offering Period. To the extent permitted by any applicable laws, regulations, or stock exchange rules, if the Fair Market Value of the Common Stock on any Exercise Date in an Offering Period is lower than the Fair Market Value of the Common Stock on the Enrollment Date of such Offering Period, then all participants in such Offering Period shall be automatically withdrawn from such Offering Period immediately after the exercise of their option on such Exercise Date and automatically re-enrolled in the immediately following Offering Period as of the first day thereof.

EXHIBIT A

NATUS MEDICAL INCORPORATED

2000 EMPLOYEE STOCK PURCHASE PLAN

SUBSCRIPTION AGREEMENT

_____ Original Application                             Enrollment Date: ________
_____ Change in Payroll Deduction Rate
_____ Change of Beneficiary(ies)

1. ____________________ hereby elects to participate in the Natus Medical Incorporated Employee Stock Purchase Plan (the "Employee Stock Purchase Plan") and subscribes to purchase shares of the Company's Common Stock in accordance with this Subscription Agreement and the Employee Stock Purchase Plan.

2. I hereby authorize payroll deductions from each paycheck in the amount of ____% of my Compensation on each payday during the Offering Period in accordance with the Employee Stock Purchase Plan. (Please note that the percentage withholding must be between 1% and 15% and that no fractional percentages are permitted.)

3. I understand that said payroll deductions shall be accumulated for the purchase of shares of Common Stock at the applicable Purchase Price determined in accordance with the Employee Stock Purchase Plan. I understand that if I do not withdraw from an Offering Period, any accumulated payroll deductions will be used to automatically exercise my option.

4. I have received a copy of the complete Employee Stock Purchase Plan. I understand that my participation in the Employee Stock Purchase Plan is in all respects subject to the terms of the Plan. I understand that my ability to exercise the option under this Subscription Agreement is subject to stockholder approval of the Employee Stock Purchase Plan.

5. Shares purchased for me under the Employee Stock Purchase Plan should be issued in the name(s) of (Employee or Employee and Spouse only):
_____________________________.

6. I understand that if I dispose of any shares received by me pursuant to the Plan within 2 years after the Enrollment Date (the first day of the Offering Period during which I purchased such shares) or one year after the Exercise Date, I will be treated for federal income tax purposes as having received ordinary income at the time of such disposition in an amount equal to the excess of the fair market value of the shares at the time such shares were purchased by me over the price which I paid for the shares. I

hereby agree to notify the Company in writing within 30 days after the date
of any disposition of my shares and I will make adequate provision for
Federal, state or other tax withholding obligations, if any, which arise
upon the

disposition of the Common Stock. The Company may, but will not be any obligated to, withhold from my compensation the amount necessary to meet applicable withholding obligation including any withholding necessary to make available to the Company any tax deductions or benefits attributable to sale or early disposition of Common Stock by me. If I dispose of such shares at any time after the expiration of the 2-year and 1-year holding periods, I understand that I will be treated for federal income tax purposes as having received income only at the time of such disposition, and that such income will be taxed as ordinary income only to the extent of an amount equal to the lesser of (1) the excess of the fair market value of the shares at the time of such disposition over the purchase price which I paid for the shares, or (2) 15% of the fair market value of the shares on the first day of the Offering Period. The remainder of the gain, if any, recognized on such disposition will be taxed as capital gain.

7. I hereby agree to be bound by the terms of the Employee Stock Purchase Plan. The effectiveness of this Subscription Agreement is dependent upon my eligibility to participate in the Employee Stock Purchase Plan.

8. In the event of my death, I hereby designate the following as my beneficiary(ies) to receive all payments and shares due me under the Employee Stock Purchase Plan:

NAME: (Please print)_____________________________________________________


(First) (Middle) (Last)

_________________________          ________________________________________
Relationship
                                   ________________________________________
                                   (Address)

Employee's Social
Security Number:                   ____________________________________
Employee's Address:                ____________________________________
                                   ____________________________________
                                   ____________________________________

I UNDERSTAND THAT THIS SUBSCRIPTION AGREEMENT SHALL REMAIN IN EFFECT THROUGHOUT SUCCESSIVE OFFERING PERIODS UNLESS TERMINATED BY ME.

Dated:_________________________         _____________________________________
                                        Signature of Employee


                                        _____________________________________
                                        Spouse's Signature (If beneficiary
                                        other than spouse)

-2-

EXHIBIT B

NATUS MEDICAL INCORPORATED

2000 EMPLOYEE STOCK PURCHASE PLAN

NOTICE OF WITHDRAWAL

The undersigned participant in the Offering Period of the Natus Medical Incorporated Employee Stock Purchase Plan which began on ____________, ______ (the "Enrollment Date") hereby notifies the Company that he or she hereby withdraws from the Offering Period. He or she hereby directs the Company to pay to the undersigned as promptly as practicable all the payroll deductions credited to his or her account with respect to such Offering Period. The undersigned understands and agrees that his or her option for such Offering Period will be automatically terminated. The undersigned understands further that no further payroll deductions will be made for the purchase of shares in the current Offering Period and the undersigned shall be eligible to participate in succeeding Offering Periods only by delivering to the Company a new Subscription Agreement.

Name and Address of Participant:




Signature:


Date:____________________________


EXHIBIT 10.6

NATUS(R)

Natus Medical Incorporated

DISTRIBUTION AGREEMENT

TERRITORY:        JAPAN
                  -----

DISTRIBUTOR:      NIPPON EUROTEC CO., LTD.
ADDRESS:          Akasaka Daiichi Building, 9-17
                  Akasaka 4-chome, Minato-ku
                  Tokyo, 107
                  Japan

EFFECTIVE DATE:   June 11, 1997
                  -------------

EXPIRATION:       June 10, 2001
                  -------------

Natus Medical Inc. 1501 Industrial Road, San Carlos, CA 94070 415-802-0400 FAX 415-802-0401

Confidential treatment has been requested for portions of this exhibit. The copy filed herewith omits the information subject to the confidentiality request. Omissions are designated as *****. A complete version of this exhibit has been filed separately with the Securities and Exchange Commission.


DISTRIBUTOR AGREEMENT

This Distributor Agreement ("Agreement"), effective as of the 11th day of June, 1997 (the "Effective Date"), is entered into by and between Natus Medical Inc., a California corporation having offices at 1501 Industrial Road, San Carlos, California 94070, United States of America ("Natus"), and Nippon Eurotec, a corporation organized under the laws of Japan, having offices at Akasaka Daiichi Building, 9-17, Akasaka 4-chome, Minato-ku, Tokyo, 107 Japan ("Nippon Eurotec").

BACKGROUND

A. Nippon Eurotec desires to distribute Natus's Products (as defined below) in Japan on the terms and conditions set forth below.

B. Natus desires to appoint Nippon Eurotec as Natus's exclusive distributor of the Products in Japan on the terms and conditions set forth below.

1. DEFINITIONS

1.1 "Customers" shall mean end-user customers for the Products solicited by Nippon Eurotec within the Territory.

1.2 "Documentation" shall mean the end-user manuals, Software license agreement and related materials provided by Natus to Nippon Eurotec hereunder, as set forth in Exhibit A.

1.3 "Product" or "Products" shall mean Natus ALGO Newborn Hearing Screener(TM) and associated disposable products, and related documentation listed on Exhibit A attached hereto, as such products may be changed by Natus in Natus's discretion from time to time during the term of this Agreement. Notwithstanding the foregoing, Natus shall not materially change the Products without first providing [***] notice to Nippon Eurotec.

1.4 "Software" shall mean the computer program(s) listed in Exhibit A in machine executable object code format and Updates thereto which are incorporated in the Product.

1.5 "Territory" shall mean Japan.

1.6 "Updates" shall mean error corrections and bug fixes that Natus generally makes available to its customers free of charge, but excluding new versions of the Software that contains significant new features or functionality, as determined by Natus in Natus' sole discretion.

2. APPOINTMENT

2.1 Grant. Natus hereby appoints Nippon Eurotec, and Nippon Eurotec hereby accepts the appointment, as Natus's exclusive distributor to distribute Products in the Territory only for use in the Territory. Natus agrees not to distribute Products directly in the Territory or to appoint any


[***] Confidential treatment requested pursuant to a request for confidential treatment filed with the Securities and Exchange Commission. Omitted portions have been filed separately with the Commission.

1

in the Territory. Natus agrees not to distribute Products directly in the Territory or to appoint any third party to distribute Products in the Territory. Inquiries for the Products received by Natus from the Territory shall be referred to Nippon Eurotec.

2.2 No Other Rights. Except as expressly provided herein, no right, title or interest is granted by Natus to Nippon Eurotec. Natus may distribute products other than Products in the Territory, either directly or indirectly, for any and all uses, and no right, title or interest is granted by Natus to Nippon Eurotec relating to products other than the Products.

2.3 Software License. Prior to providing any Customer with any Software, Nippon Eurotec shall ensure that each Customer has read and agreed to the terms and conditions of the Software license agreement contained in each Software package (the "Software License Agreement"). Nippon Eurotec shall diligently enforce Software License Agreements and use its best efforts to ensure that Customers abide by the terms of Software License Agreements. Nippon Eurotec shall not, and shall not authorize any third party to, copy, modify, alter, reverse engineer, disassemble or decompile the Products, and Nippon Eurotec shall not distribute or market any Product containing any Software electronically, or by interactive cable, remote processing services, online services, linkups or multi-user local or area networks. Software provided to Nippon Eurotec hereunder is subject to license and not sale.

2.4 [***]. Except for the [***] and the [***] listed in Exhibit B
attached hereto, the parties acknowledge and agree that any [***] by [***] to
[***], or [***] in the [***] ("[***] Products") in the [***] would [***] a
[***] with respect to [***] to [***] and [***] the Products, and [***] the
[***] and the [***] listed in Exhibit B attached hereto, [***] represents and warrants that [***] the [***] of the [***], it does [***] any [***] and will
[***] any [***] during the [***] of [***].

2. OBLIGATIONS OF NIPPON EUROTEC

3.1 Diligence. Nippon Eurotec shall use its best efforts to promote vigorously the marketing and distribution of the Products to realize the maximum sales potential for the Products in the Territory. Except as expressly set forth herein, Nippon Eurotec shall be solely responsible for all costs and expenses related to the advertising, marketing, promotion, and distribution of the Products and for performing its obligations hereunder.

3.2 Import. [***] shall be responsible for the importation of the Products, including shipping and duties.

3.3 Staffing. Nippon Eurotec will dedicate sufficient staff to undertake its activities.

3.4 Inventory. Nippon Eurotec shall maintain a sufficient inventory of Products.


[***] Confidential treatment requested pursuant to a request for confidential treatment filed with the Securities and Exchange Commission. Omitted portions have been filed separately with the Commission.

2

3.5 Reports. Nippon Eurotec shall report to Natus, within thirty (30) working days after the end of each quarter, on the Nippon Eurotec Sales Report Form contained in Exhibit C hereto.

3.6 Application for Government Approvals. The Parties anticipate that applications will need to be submitted, and approvals obtained, from the Japanese Ministry of Health and Welfare ("MHW") concerning the importation and sale of Products in the Territory.

3.6.1 Shonin. With respect to each Natus product included as a Product hereunder, Nippon Eurotec agrees to prepare and submit an application for Shonin and to exert every effort to obtain Shonin on Products. Shonin for the first Product and all subsequent Products shall be obtained by no later than the date agreed to in writing by Nippon Eurotec and Natus. Natus reserves the right to terminate this Agreement pursuant to paragraph 16 herein in the event any Shonin for any Product is not obtained by such date. Natus will provide up to two
(2) units of Product for each Shonin application. Nippon Eurotec will bear all costs incurred in Shonin application, and Natus shall reimburse Nippon Eurotec as set forth below. Natus shall receive draft copies of all documents prior to submittal to the MHW, and Natus reserves the right to require changes in any such application documents.

3.6.2 Kyoka. The parties anticipate that Kyoka will likely be required at the time of importation of Products. Nippon Eurotec shall at its own cost obtain Kyoka.

3.6.3 MHW Reimbursement Schedule. The parties contemplate that it will be advantageous to obtain MHW approval for Products to allow reimbursement under Japan's medical insurance reimbursement system. Nippon Eurotec shall obtain medical insurance reimbursement approval, the costs for which shall be borne by Nippon Eurotec.

3.6.4 Ownership of Approvals The parties agree that Shonin may be applied for and obtained in Nippon Eurotec's name, and if so, that Nippon Eurotec shall hold such Shonin solely for the benefit of Natus subject to the terms of this Agreement. Nippon Eurotec agrees that at Natus's unilateral request, Nippon Eurotec shall take all actions required to transfer Product Shonin to Natus or its nominee, and at such time Nippon Eurotec shall be reimbursed for its direct out-of- pocket expenses in connection with each Product Shonin obtained by Nippon Eurotec in an amount [***] to [***] by a [***] the [***] of which shall be the [***] of this Agreement and the [***] of [***] shall be the [***] of [***] in the [***] of this Agreement. Notwithstanding the foregoing, Nippon Eurotec shall not be reimbursed for its expenses if this Agreement is terminated (i) by Natus for Nippon Eurotec's breach; (ii) by expiration of this Agreement; or
(iii) by Natus for Nippon Eurotec's inability to obtain Shonin under this section.

3.7 Product Support. Nippon Eurotec shall be solely responsible for supporting all Products distributed hereunder. Nippon Eurotec shall provide reasonable technical support to


[***] Confidential treatment requested pursuant to a request for confidential treatment filed with the Securities and Exchange Commission. Omitted portions have been filed separately with the Commission.

3

Customers, including without limitation (i) maintaining trained and competent technical and engineering support personnel for the Products who are sufficiently knowledgeable with respect to the Products to answer Customer questions regarding the use and operation of Products, (ii) designating a technical liaison to coordinate Nippon Eurotec's technical support provided to Customers, (iii) responding promptly to requests for technical support from Customers, and (iv) providing technical support services to address and resolve Customers' support requests with respect to the Products. Nippon Eurotec shall ensure that Nippon Eurotec's technical and engineering support personnel attend any training provided by Natus with respect to the Products.

3.8 Customer Inquiries. Nippon Eurotec shall ensure that all Customer questions regarding the use or operation of Products are initially addressed to and answered by Nippon Eurotec.

3.9 Product Support Reports. Without limiting the foregoing and in addition to any other obligations set forth in Natus' then current support terms and conditions, Nippon Eurotec also shall be responsible for (i) providing sufficient information to Natus for Natus to duplicate any reported error in the Products; (ii) incorporating Updates into the Products promptly upon receipt thereof; (iii) reporting errors promptly in English and in writing in accordance with Natus' standard support procedures; and (iv) providing reasonable cooperation and full information to Natus in the furnishing of support for the Products.

3.10 Insurance. During the term of this Agreement, Nippon Eurotec shall obtain and keep in force comprehensive, general liability, and product liability insurance, with limits at least equal to the total retail value of all Products sold by Nippon Eurotec, and naming Natus as a loss payee.

4. OBLIGATIONS OF NATUS

4.1 Information and Support. Natus shall use reasonable efforts to provide to Nippon Eurotec such back-up telephone or electronic-mail technical support as Natus makes generally available to its distributors other than Nippon Eurotec. Such telephone support shall be provided during Natus' normal business hours.

4.2 Marketing Materials. Natus, at its expense, shall periodically provide Nippon Eurotec with reasonable quantities of Natus' advertising and promotional materials, pricing information and technical data related to the Products in English, in each case to the extent Natus in its discretion makes such materials generally available to its distributors other than Nippon Eurotec; provided that Nippon Eurotec shall pay the freight costs and other taxes and duties applicable to any such items provided or the delivery thereof. Nippon Eurotec, at its expense, shall produce Japanese language versions of such marketing materials, but only with Natus' prior written approval; and shall provide Natus with copies of all Japanese language materials which it has prepared.

4.3 Translation; Software Localization.

4.3.1 Translation of Documentation. Documentation including end-user manuals, Software License Agreement, promotional and advertising materials and related

4

materials provided by Natus pertaining to Products shall be translated into Japanese by Nippon Eurotec's expense. Prior to using any such translated materials, however, Nippon Eurotec shall provide to Natus full Japanese text drafts of all such translated Documentation, and shall refrain from releasing to any third party any such translated Documentation without the prior written approval of Natus. Natus owns the copyright to all such translated Documentation. The schedule for preparing such translated Documentation shall be agreed to by the parties.

4.3.2 Software Localization. Natus Software shall be "localized" according to a schedule and budget to be agreed to by the parties. It is expected that after an initial number of Products have been purchased and are being used by end-users, that Natus and Nippon Eurotec will meet and confer to determine which functions and features of Software need to be "localized." Natus, as project manager, and Nippon Eurotec will [***] provided that no expenses for "localization" shall be incurred by either party without the prior written consent of both parties. Natus shall hold copyright to all such "localized" Software.

4.4 Training and Personnel Exchanges. The parties agree that technical service training, product training, and ongoing personnel exchanges, shall occur as follows:

4.4.1 Nippon Eurotec shall dispatch [***] competent technical service employees to Natus to be trained in Product technical service. Training for a period of up to [***] shall be offered at
[***] by Natus. Travel, housing, and all other incidental costs to be incurred by such Nippon Eurotec Employees shall be the responsibility of Nippon Eurotec.

4.4.2 Natus shall dispatch up to [***] of its personnel to conduct Product training in Japan of Nippon Eurotec sales personnel, as well as end-users as appropriate. Such Product training for up to [***] in duration shall be offered [***] by Natus. International air transportation and Tokyo lodging costs shall be borne by [***]; domestic Japanese travel outside Tokyo, including transportation, lodging, and meals, shall be borne by Nippon Eurotec. Training necessitated by Product Software updates shall be conducted as necessary.

4.4.3 The parties agree that it is mutually beneficial to regularly exchange sales, technical, or executive personnel, at a frequency of at least annually, during the term of this Agreement. Accordingly, each party shall reasonably accommodate the other at such time as one party desires to send sales, technical, or executive personnel to the other party. Each party shall pay all its own expenses in connection with any such exchanges.

5. PRICE/PRICE CHANGE

5.1 Price. The prices and fees to be paid by Nippon Eurotec to Natus for Products shall be as set forth in price purchase schedules issued by Natus from time to time during the term of this


[***] Confidential treatment requested pursuant to a request for confidential treatment filed with the Securities and Exchange Commission. Omitted portions have been filed separately with the Commission.

5

Agreement ("Price"). The Prices of Products as of the Effective Date are as set forth in EXHIBIT D attached hereto.

5.2 Price Changes Generally. Prices are subject to change by Natus at any time in its sole discretion. However, price changes shall be effective after
[***] written notice to Nippon Eurotec, and Natus shall reasonably accept orders at the earlier price received during such [***] period.

6. TAXES AND OTHER CHARGES. Prices do not include and are net of any Japanese or United States governmental taxes or charges of any kind. All payments by Nippon Eurotec shall be made free and clear of, and without reduction for, any withholding taxes.

7. PAYMENT Unless otherwise specified, Products are priced [***]. Payment shall be by international, irrevocable, negotiable letters of credit, permitting partial shipment and partial payment, payable in no longer than thirty (30) days, in U.S. Dollars, and confirmed through such bank as Natus may from time to time require, presented at least thirty days prior to requested shipment, and on such other commercially reasonable terms as Natus requires from time to time. At the request of Nippon Eurotec, Natus may provide for or allow other reasonable payment terms on any particular sale.

8. ORDERS

8.1 Order and Acceptance. All orders for Products submitted by Nippon Eurotec shall be initiated by written purchase order sent to Natus and requesting a shipment date during the term of this Agreement; provided, however, that an order may be initially placed orally, by telecopy or fax if a conformational written purchase order is received by Natus within ten (10) days of said oral, telecopy or fax order. All orders for Products are subject to acceptance by Natus in writing, and Natus shall have no liability to Nippon Eurotec with respect to purchase orders that are not accepted. No partial acceptance of a purchase order shall constitute the acceptance of an entire order, absent the written acceptance of such entire order. To facilitate Natus's production scheduling, Nippon Eurotec shall submit purchase orders to Natus in accordance with Natus's lead times then in effect which shall be communicated to Nippon Eurotec upon Nippon Eurotec's request. Notwithstanding the foregoing, Nippon Eurotec acknowledges and agrees that the shipment and delivery dates are estimates only.

8.2 Minimum Purchase Requirements For Products. Nippon Eurotec shall purchase the minimum quantities of Products set forth in Exhibit D.

8.3 Failure to Meet Purchase Requirements. If, at the end of any period referred to in Exhibit D, Nippon Eurotec has not, for any reason, purchased the corresponding minimum amount, such failure shall be deemed a material breach of this Agreement under Section 16(b) below.

9. SHIPMENT/RISK OF LOSS Products delivered pursuant to the terms of this Agreement shall be suitably packed for export in Natus's standard shipping cartons, marked for shipment to the


[***] Confidential treatment requested pursuant to a request for confidential treatment filed with the Securities and Exchange Commission. Omitted portions have been filed separately with the Commission.

6

destination specified in Nippon Eurotec's purchase order, and delivered to the carrier [***].

10. ORDER CHANGES Purchase orders for Products may be canceled or rescheduled only with Natus's prior written approval.

11. REJECTION Nippon Eurotec shall inspect all Products promptly upon receipt thereof and may reject any defective Product, provided that Nippon Eurotec shall (i) within the earlier of [***] after receipt of such alleged defective Product or [***] after discovery of such alleged defect, notify Natus of its rejection and request a Return Material Authorization ("RMA") number, and (ii) within [***] of receipt of the RMA number from Natus, return such rejected Product to Natus, such shipment to be [***] into the custody of Natus' shipping agent in Japan, using the carrier and shipping mode specified by Natus. Products not rejected within the foregoing time periods shall be deemed accepted by Nippon Eurotec. In the event that Natus determines that the returned Product is defective and properly rejected by Nippon Eurotec, Natus shall at its option repair or replace such defective Product, or accept return for credit of such defective Product. Natus shall return to Nippon Eurotec, freight prepaid, all repaired or replaced Products properly rejected by Nippon Eurotec. In the event that any rejected Product is determined by Natus to not be defective or to have been modified or subjected to unusual electrical or physical stress, misuse, abuse or unauthorized repair, Nippon Eurotec shall reimburse Natus for all costs and expenses related to the shipping, insurance, inspection, repair, if any, and return of such Product to and from Nippon Eurotec. Except as set forth in this Section 11, Nippon Eurotec shall only return Products to Natus with Natus's prior written approval.

12. PRODUCT CHANGES Natus reserves the right from time to time in its sole discretion, without incurring any liability to Nippon Eurotec with respect to any previously placed purchase order, to discontinue or to limit its production of any Product; to allocate, terminate or limit deliveries of any Product in time of shortage; to alter the design or construction of any Product; to add new and additional products to the "Products;" and upon at least [***] notice to Nippon Eurotec, to change its sales and distribution policies, not inconsistent with the terms of this Agreement.

13. FORECASTS By the end of the [***], Nippon Eurotec shall provide Natus with a good faith [***] rolling forecast commencing with the [***] showing Nippon Eurotec's prospective requirements for the Products and anticipated purchase order submittal dates, including all sales and business prospects, in such format as specified by Natus ("Forecast"). Forecasts shall commence on the [***] following submission of the Forecast to Natus. Forecasts are for Natus's planning purposes only and shall not constitute a binding obligation on the part of Natus to supply Products in accordance with such Forecasts, nor shall Forecasts constitute firm purchase orders by Nippon Eurotec.

14. RETURNED PRODUCT Any Product returned to Natus by Nippon Eurotec as authorized under this Agreement shall be shipped [***] into the custody of the carrier and using the shipping method as specified by Natus, to Natus' San Carlos U.S.A. facility or such other


[***] Confidential treatment requested pursuant to a request for confidential treatment filed with the Securities and Exchange Commission. Omitted portions have been filed separately with the Commission.

7

location as Natus may instruct Nippon Eurotec, and shall be packed in its original packing material. Natus may refuse to accept any Product not packed and shipped as herein provided.

15. LIMITED WARRANTY

15.1 Limited Warranty. Subject to the provisions of this Section 15, Natus warrants to Nippon Eurotec that Products, as delivered, will be free from defects in materials and workmanship for a period the shorter of [***] from sale to the Customer by Nippon Eurotec and [***] from shipping the Product to Nippon Eurotec ("Warranty Period"). The foregoing warranty is contingent upon proper use of the Products in the applications for which they were intended and shall not apply to Products that are modified or subjected to unusual physical or electrical stress, misuse, abuse, or unauthorized repair. Natus's sole liability and Nippon Eurotec's exclusive remedy shall be limited to repair, replacement, credit or refund, at Natus's sole option and election. Natus shall pay all freight charges for shipment of any replacement Product to Nippon Eurotec during the Warranty Period. Replacement or repair of a Product shall not extend the original warranty for that unit, and Nippon Eurotec may return Product only during the original Warranty Period.

15.2 Disclaimer of Warranties. EXCEPT AS EXPRESSLY PROVIDED IN SECTION 15.1 ABOVE, NATUS MAKES NO WARRANTIES OR CONDITIONS, EXPRESS, STATUTORY, IMPLIED, OR OTHERWISE, AND NATUS SPECIFICALLY DISCLAIMS THE IMPLIED WARRANTIES AND CONDITIONS OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE NOTWITHSTANDING THE FOREGOING, NATUS DOES NOT EXCLUDE LIABILITY TO THE EXTENT THAT SUCH LIABILITY MAY NOT BE EXCLUDED OR LIMITED BY LAW.

15.3 Nippon Eurotec Limitations. Except to the extent required by applicable law, Nippon Eurotec shall not pass on to its customers a warranty of greater scope or protection than the warranty (including the limited remedy, exclusions, and limitation of liability) set forth in this Section 15 and
Section 20 below. Nippon Eurotec shall indemnify, defend and hold harmless Natus from any claim or liability arising out of or relating to breach of the foregoing provisions of this Section 15.3 or representations or warranties which exceed Natus's express warranties set forth in this Section 15.

15.4 Product Returns. In order to return Product that fails to conform to the foregoing warranty set forth in this Section 15, Nippon Eurotec shall (i) notify Natus in writing that such Product failed to conform with the warranty set forth in this Section 15 and furnish a detailed explanation of any alleged nonconformity; (ii) obtain a RMA number for the nonconforming Product from Natus; and (iii) within ten (10) days of receipt of the RMA number, return such Product to Natus as specified by Natus with the RMA number prominently attached, shipped [***] facility address first set forth above or such other location as Natus may designate in writing in each case during the Warranty Period.

16. TERM AND TERMINATION


[***] Confidential treatment requested pursuant to a request for confidential treatment filed with the Securities and Exchange Commission. Omitted portions have been filed separately with the Commission.

8

16.1 Term. This Agreement shall commence upon the Effective Date and

continue in full force and effect for a fixed term of four (4) years, and shall terminate on that date unless earlier terminated in accordance with the provisions of this Agreement or unless otherwise agreed to in writing by the parties.

16.2 Termination for Cause. Natus may terminate this Agreement effective upon written notice to Nippon Eurotec stating its intention to terminate in the event Nippon Eurotec breaches any of the provisions of Sections 2 or 17. Without limiting the foregoing, either party may terminate this Agreement effective upon written notice to the other party stating such party's intention to terminate, in the event the other party:

(i) ceases to function as a going concern or to conduct operations in the normal course of business or enters into any composition proceedings, or

(ii) has a petition filed by or against it under any state or federal bankruptcy or insolvency law which petition has not been dismissed or set aside within sixty (60) days of its filing; or

(iii) fails to perform any of its obligations under this Agreement so as to be in default hereunder and fails to cure such default within thirty (30) days after written notice of such default.

16.3 Minimum Purchase Amounts and Forecasts. Natus shall have the right to terminate this Agreement with [***] notice to Nippon Eurotec if Nippon Eurotec does not purchase the minimum amounts set forth in Exhibit D hereto.

16.4 Purchase Orders: No Waiver. Nippon Eurotec shall be obligated to accept deliveries of Products for which purchase orders were accepted by Natus prior to the effective date of termination. After any notice of termination has been delivered by either party hereunder, deliveries of Product from Natus to Nippon Eurotec, unless otherwise agreed by Natus, shall require prepayment by Nippon Eurotec to Natus. The acceptance of any purchase order from, or the sale or license of any Product, to Nippon Eurotec after the termination or expiration of this Agreement shall not be construed as a renewal or extension of this Agreement nor as a waiver of termination of this Agreement.

16.5 No Liability for Termination. Except as expressly required by law, in the event of termination of this Agreement by either party in accordance with any of the provisions of this Agreement, neither party shall be liable to the other, because of such termination, for compensation, reimbursement or damages on account of the loss of prospective profits or anticipated sales or on account of expenditures, inventory, investments, leases or commitments in connection with the business or goodwill of Natus or Nippon Eurotec. Termination shall not, however, relieve either party of obligations incurred prior to the termination.

16.6 Survival. Nippon Eurotec may sell Products existing in its inventory as of the effective date of termination of this Agreement for a period of
[***]


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9

after the effective date of such termination ("Wind-Down Period"). During the Wind-Down Period, the provisions of Sections 6, 7 and 9 shall survive. In addition to the provisions set forth in this Section 16.6, the following provisions shall survive expiration or any termination of this Agreement:
Sections 1, 15, 16.4-16.7, 17, 20, 21, 22 and the last sentence of Section 19.2.

16.7 Return of Materials. All Products, trademarks, marks, trade names, patents, copyrights, any customer information not yet provided to Natus under
Section 3(f), designs, drawings, formulas or other data, photographs, samples, literature, and sales and promotional aids of every kind shall remain the property of Natus. Within thirty (30) days after the effective date of termination of this Agreement, Nippon Eurotec shall at Natus's option destroy all tangible items bearing, containing, or contained in, any of the foregoing, in its possession or control and provide written certification of such destruction, or prepare such tangible items for shipment to Natus or Natus's designee, as Natus may direct, at Natus's expense. Nippon Eurotec shall not make or retain any copies of any Confidential Information (as defined in Section 17 below) which may have been entrusted to it.

17. CONFIDENTIALITY AND PROPRIETARY RIGHTS

17.1 Confidentiality. Nippon Eurotec acknowledges that by reason of its relationship to Natus hereunder it will have access to certain information and materials concerning Natus's business, plans, Customers, technology, and products that are confidential and of substantial value to Natus, which value would be impaired if such information were disclosed to third parties ("Confidential Information"). Nippon Eurotec agrees that it will not use in any way for its own account or the account of any third party, nor disclose to any third party, any Confidential Information revealed to it by Natus. Nippon Eurotec shall take every reasonable precaution to protect the confidentiality of Confidential Information. Upon request by Nippon Eurotec, Natus shall advise whether or not it considers any particular information or materials to be confidential. Nippon Eurotec shall not publish any technical description of the Products beyond the description published by Natus. In the event of termination of this Agreement, there shall be no use or disclosure by Nippon Eurotec of any Confidential Information of Natus, and Nippon Eurotec shall not manufacture or have manufactured any devices, components or assemblies utilizing any of Natus's confidential information.

17.2 Proprietary Rights. Nippon Eurotec agrees that Natus retains all of its right, title and interest in and to all patent rights, trademarks, trade names, inventions, copyrights, know-how and trade secrets relating to the Products or the product lines that include the Products, and the design, manufacture, operation or service of the Products. The use by Nippon Eurotec of any of these property rights is authorized only for the purposes herein set forth and upon termination of this Agreement for any reason such authorization will cease. Nippon Eurotec shall not (and shall require that its customers do not) remove, alter, cover or obfuscate any proprietary rights notices placed or embedded by Natus on or in any Product. Nippon Eurotec shall not apply to register any proprietary rights covered by the Products in its own name.

18. PATENT/COPYRIGHT/TRADEMARK AND PRODUCT LIABILITY INDEMNIFICATION

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18.1 Indemnity. Nippon Eurotec agrees that Natus has the right to defend, or at its option to settle, and Natus agrees, at its own expense, to defend or at its option to settle, any third party claim, suit or proceeding (collectively, "Action") brought against Nippon Eurotec alleging the Products infringe any patent, copyright or trademark in existence as of the Effective Date, subject to the limitations hereinafter set forth. Natus will have sole control of any such Action or settlement negotiations, and Natus agrees to pay, subject to the limitations hereinafter set forth, any final judgment entered against Nippon Eurotec on such issue in any such Action defended by Natus. Nippon Eurotec agrees that Natus will be relieved of the foregoing obligations unless Nippon Eurotec notifies Natus promptly in writing of such Action, gives Natus authority to proceed as contemplated herein, and gives Natus proper and full information and assistance to settle and/or defend any such Action. If it is adjudicatively determined, or if Natus believes, that the Products, or any part thereof, infringe any patent, copyright or trademark, or if the sale or use of the Products, or any part thereof, is, as a result, enjoined, then Natus may, at its election, option, and expense: (i) procure for Nippon Eurotec the right under such patent, copyright or trademark to sell or use, as appropriate, the Products or such part thereof; or (ii) replace the Products, or part thereof, with other noninfringing suitable Products or parts; or (iii) suitably modify the Products or part thereof; or (iv) remove the Products, or part thereof, terminate distribution or sale thereof and refund the payments paid by Nippon Eurotec for such Products less a reasonable amount for use and damage. Natus will not be liable for any costs or expenses incurred without its prior written authorization, or for any installation costs of any replaced Products.

18.2 Limitations. Notwithstanding the provisions of Section 18.1 above, Natus has no liability to Nippon Eurotec for (i) any infringement of patent or copyright claims alleging infringement by completed equipment or any assembly, combination, method or process in which any of the Products may be used but not covering the Products standing alone; (ii) any trademark infringements involving any marking or branding not applied by or requested by Natus, or involving any marking or branding applied by Natus at the request of Nippon Eurotec; or (iii) the modification of the Products, or any part thereof, unless such modification was made by Natus, where such infringement would not have occurred but for such modifications.

18.3 Disclaimer. NATUS' LIABILITY ARISING OUT OF OR RELATING TO THIS SECTION 18 SHALL NOT EXCEED THE AGGREGATE AMOUNTS PAID BY NIPPON EUROTEC TO NATUS FOR THE ALLEGEDLY INFRINGING PRODUCTS THAT ARE THE SUBJECT OF THE INFRINGEMENT CLAIM. THE FOREGOING PROVISIONS OF THIS SECTION 18 STATE THE ENTIRE LIABILITY AND OBLIGATIONS OF NATUS AND THE EXCLUSIVE REMEDY OF NIPPON EUROTEC AND ITS CUSTOMERS, WITH RESPECT TO ANY ALLEGED PATENT, COPYRIGHT OR TRADEMARK INFRINGEMENT BY THE PRODUCTS OR ANY PART THEREOF.

18.4 Product Liability Indemnification. Natus shall at its own expense indemnify and hold harmless Nippon Eurotec, and its directors, officers, employees and agents, from and against any and all third party claims for losses, damages (actual, consequential or indirect), liabilities, penalties, demands, suits or actions, and related costs and expenses of any kind (including, without limitation, Nippon Eurotec's reasonable out-of-pocket expenses of investigation and recall, counsel fees, judgements and settlements) for injury to or death of any person or property damage or any other

11

loss suffered or allegedly suffered by any person or entity and arising out of or otherwise in connection with any defect or alleged defect of the Products sold by Natus to Nippon Eurotec under this Agreement (the "Claim"). Natus will have sole control of any such Claim or settlement negotiations. Nippon Eurotec agrees that Natus will be relieved of the foregoing obligations unless Nippon Eurotec notifies Natus promptly in writing of such Claim, gives Natus authority to proceed as contemplated herein, and gives Natus proper and full information and assistance to settle and/or defend any such Claim.

19. USE OF TRADEMARKS/TRADE NAMES

19.1 Trademarks. Natus, at its expense, shall seek registration of appropriate Natus trademarks in the Territory. During the term of this Agreement, Nippon Eurotec shall have the right to indicate to the public that it is an authorized distributor of the Products and to advertise such Products under the trademarks, marks, and trade names of Natus set forth in Exhibit E ("Natus' Trademarks") and in the promotion and distribution of the Products; provided, however, that upon ninety (90) days prior written notice to Nippon Eurotec, Natus may substitute alternative marks for any or all of the Natus's Trademarks. All representations of Natus' Trademarks that Nippon Eurotec intends to use shall first be submitted to Natus for approval (which shall not be unreasonably , withheld) of design, color and other details or shall be exact copies of those used by Natus. In addition, Nippon Eurotec shall fully comply with all reasonable guidelines, if any, communicated by Natus concerning the use of Natus' Trademarks.

19.2 Use. Nippon Eurotec shall not alter or remove any of Natus' Trademarks

affixed to the Products by Natus. Except as set forth in this Section 19, nothing contained in this Agreement shall grant or shall be deemed to grant to Nippon Eurotec any right, title or interest in or to Natus's Trademarks. All uses of Natus' Trademarks will inure solely to Natus and Nippon Eurotec shall obtain no rights with respect to any of Natus' Trademarks, other than the right to distribute Products as set forth herein, and Nippon Eurotec irrevocably assigns to Natus all such right, title and interest, if any, in any of Natus' Trademarks. At no time during or after the term of this Agreement shall Nippon Eurotec challenge or assist others to challenge Natus' Trademarks (except to the extent expressly prohibited by applicable law) or the registration thereof or attempt to register any trademarks, marks or trade names confusingly similar to those of Natus. Upon termination of this Agreement, Nippon Eurotec shall immediately cease to use all Natus' Trademarks and any listing by Nippon Eurotec of Natus' name in any telephone book, directory, public record or elsewhere, shall be removed by Nippon Eurotec as soon as possible, but in any event not later than the subsequent issue of such publication.

20. LIMITATION OF LIABILITY Natus's liability arising out of or relating to this Agreement, including liability under Section 16(e), shall not exceed the aggregate amounts paid by Nippon Eurotec to Natus hereunder. IN NO EVENT SHALL EITHER PARTY BE LIABLE FOR LOST PROFITS, COST OF PROCUREMENT OF SUBSTITUTE GOODS, OR ANY OTHER SPECIAL, RELIANCE, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, HOWEVER CAUSED AND UNDER ANY THEORY OF LIABILITY WHETHER BASED IN CONTRACT, TORT (INCLUDING NEGLIGENCE), OR OTHERWISE. THE FOREGOING LIMITATIONS SHALL APPLY REGARDLESS OF WHETHER SUCH PARTY HAS BEEN ADVISED OF THE

12

POSSIBILITY OF SUCH DAMAGES AND NOTWITHSTANDING THE FAILURE OF ESSENTIAL PURPOSE OF ANY LIMITED REMEDY STATED HEREIN.

21. COMPLIANCE WITH LAWS

21.1 Export Control. Nippon Eurotec understands and acknowledges that Natus is subject to regulation by agencies of the United States Government, including, but not limited to, the U.S. Department of Commerce, which prohibit export or diversion of certain products and technology to certain countries. Any and all obligations of Natus to provide the Products, as well as any other technical information or assistance shall be subject in all respects to such United States laws and regulations as shall from time to time govern the license and delivery of technology and products abroad by persons subject to the jurisdiction of the United States, including the Export Administration Act of 1979, as amended, any successor legislation, and the Export Administration Regulations issued by the Department of Commerce, Bureau of Export Administration. Nippon Eurotec agrees to cooperate with Natus including without limitation, providing required documentation, in order to obtain export licenses or exemptions therefrom. Nippon Eurotec warrants that it will comply with the Export Administration Regulations and other United States laws and regulations governing exports in effect from time to time. Nippon Eurotec further agrees not to resell Products to any organization, public or private, which engages in the research or production of military devices, armaments, or any instruments of warfare, including biological, chemical and nuclear warfare.

21.2 Governmental Approvals. Nippon Eurotec represents and warrants that it has obtained or will obtain all required approvals and registrations (which include Shonin ("Approvals") of the government of Japan in connection with this Agreement and that the provisions of this Agreement and the rights and obligations of the parties hereunder, are enforceable under the laws of Japan. Nippon Eurotec shall notify Natus of all Approvals obtained by it and shall provide Natus with copies of all material documents relating thereto.

22. MISCELLANEOUS PROVISIONS

22.1 Independent Contractors. The relationship of Natus and Nippon Eurotec established by this Agreement is that of independent contractors, and neither party is an employee, agent, partner or joint venturer of the other. All financial obligations associated with Nippon Eurotec's business are the sole responsibility of Nippon Eurotec. All sales and other agreements between Nippon Eurotec and its customers are Nippon Eurotec's exclusive responsibility and will have no effect on Nippon Eurotec's obligations under this Agreement.

22.2 Assignment. Nippon Eurotec may not transfer or assign its rights or obligations under this Agreement without the prior written consent of Natus. Subject to the foregoing sentence, this Agreement will be binding upon and inure to the benefit of the parties hereto, their successors and assigns. Successors of Natus shall include any party which acquires Natus or into which Natus merges.

13

22.3 Indemnity. Except for warranty claims for which Natus is liable under Section 15 and infringement claims covered by Section 18, Nippon Eurotec agrees to indemnify and hold Natus harmless against any cost, loss, liability or expense (including attorneys' fees) arising out of third party claims against Natus relating to Nippon Eurotec's use and distribution of the Products.

22.4 No Implied Waivers. The failure of either party at any time to require performance by the other of any provision hereof shall not affect the right of such party to require performance at any time thereafter, nor shall the waiver of either party of a breach of any provision hereof be taken or held to be a waiver of a provision itself.

22.5 Severability. If any provision of this Agreement is held to be invalid by a court of competent jurisdiction, then the remaining provisions will nevertheless remain in full force and effect. The parties agree to renegotiate in good faith those provisions so held to be invalid to be valid, enforceable provisions which provisions shall reflect as closely as possible the original intent of the parties, and further agree to be bound by the mutually agreed substitute provision.

22.6 Force Majeure. Except for payment of monies, neither party shall be liable for failure to fulfill its obligations under this Agreement or any purchase order issued hereunder or for delays in delivery due to causes beyond its reasonable control, including, but not limited to, acts of God, man-made or natural disasters, earthquakes, fire, riots, flood, material shortages, strikes, delays in transportation or inability to obtain labor or materials through its regular sources. The time for performance of any such obligation shall be extended for the time period lost by reason of the delay.

22.7 Conflicting Terms. The parties agree that the terms and conditions of this Agreement shall prevail, notwithstanding contrary or additional terms, in any purchase order, sales acknowledgment, confirmation or any other document issued by either party effecting the purchase and/or sale of Products, unless the parties agree otherwise in writing.

22.8 Headings. Headings of paragraphs herein are inserted for convenience of reference only and shall not affect the construction or interpretation of this Agreement.

22.9 Liability of Natus. The provisions of this Agreement under which the liability of Natus is excluded or limited shall not apply to the extent that such exclusions or limitations are declared illegal or void under the laws applicable in the Territory in which Products are sold, unless the illegality or invalidity is cured under the laws of the Territory by the fact that the law of California governs this Agreement.

22.10 Notice. Any notice required or permitted to be given under this Agreement shall be delivered (i) by hand, (ii) by registered or certified mail, postage prepaid, return receipt requested, to the address of the other party first set forth above, or to such other address as a party may designate by written notice in accordance with this Section 22.10, (iii) by overnight courier, or (iv) by fax with confirming letter mailed under the conditions described in (ii) above. Notice so given shall be deemed effective when received, or if not received by reason of fault of addressee, when delivered.

14

22.11 Entire Agreement. This Agreement contains the entire understanding of the parties with respect to the subject matter hereof and supersedes all prior agreements relating thereto, written or oral, between the parties. Amendments to this Agreement must be in writing, signed by the duly authorized officers of the parties. The terms of any purchase order are expressly excluded.

22.12 Governing Law. This Agreement shall be governed by and construed under the law of the State of California, without regard to conflict of laws principles or the U.N. Convention on Contracts for the International Sale of Goods.

22.13 Arbitration. Any dispute or claim arising out of or in relation to this Agreement, or the interpretation, making, performance, breach or termination thereof, shall be finally settled by binding arbitration under the Rules of Conciliation and Arbitration of the International Chamber of Commerce as presently in force ("Rules") and by three (3) arbitrators appointed in accordance with said Rules. Judgment on the award rendered may be entered in any court having jurisdiction thereof. The place of arbitration shall be San Francisco, California, U.S.A. Any monetary award shall be in U.S. dollars and the arbitration shall be conducted in the English language. The parties may apply to any court of competent jurisdiction for temporary or permanent injunctive relief, without breach of this Section 22.13 and without any abridgment of the powers of the arbitrator. The prevailing party at any such arbitration or in any legal proceeding brought to enforce terms of this Agreement shall be entitled to an award of attorney's fees and other costs of such arbitration or proceeding.

IN WITNESS WHEREOF, the parties hereto have duly executed this Agreement effective as of the Effective Date.

NIPPON EUROTEC Co., Ltd.                  NATUS MEDICAL INC.


By: /s/ Toshifumi Wakayama               By: /s/ Tom C. Johnson
    --------------------------------         ----------------------------------

Name: Toshifumi Wakayama                 Name: Tom C. Johnson
      ------------------------------           --------------------------------
      (Typed or Printed)                         (Typed or Printed)

Title: President                         Title: President
       -----------------------------            -------------------------------


Exhibit A:  Product List
Exhibit B:  [***] Products

Exhibit C: Nippon Eurotec Sales Report Form Exhibit D: Product Prices; Minimum Purchase Requirements Exhibit E: Natus' Trademarks


[***] Confidential treatment requested pursuant to a request for confidential treatment filed with the Securities and Exchange Commission. Omitted portions have been filed separately with the Commission.

15

EXHIBIT A

NATUS PRODUCT LISTING AND DOCUMENTATION

ALGO(TM)2 NEWBORN HEARING SCREENER
Product Manual
Technical Service Manual
Product (Inservice) Video
Software License Agreement

ALGO(TM)2e NEWBORN HEARING SCREENER
Product Manual
Technical Service Manual
Product (Inservice) Video
Software License Agreement

Replacement Parts for ALGO(TM) Newborn Hearing Screeners Natus Screening Supplies for ALGO(TM) Newborn Hearing Screeners Natus Software for ALGO(TM) Newborn Hearing Screeners Natus Neonatal Supplies

(See price list in EXHIBIT D for descriptions of the above products.)

MARKETING MATERIALS:/1/
Newborn Hearing Screening Program Handbook Parent Education Video
"Ten Fingers Ten Toes..." poster
"The importance of Newborn Hearing Screening..." brochure ALGO DataBook(TM) NHS Data Tracking System Product Sheet ALGO 2e(TM) Newborn Hearing Screener Product Sheet AABR(TM) Automated Auditory Brainstem Response Product Sheet


/1/ Marketing Materials provided in English final printed format

16

EXHIBIT B

[***] PRODUCTS

[To be listed by [***]; to include a detailed list of all [***] now being sold by [***] in the [***].]


[***] Confidential treatment requested pursuant to a request for confidential treatment filed with the Securities and Exchange Commission. Omitted portions have been filed separately with the Commission.

17

EXHIBIT C

Nippon Eurotec Sales Repart Form

1. Sales during Quarter ended ____/____/____:
a. Units sold
b. Disposables sold
c. Purchaser's name, address, telephone number, fax number; responsible contact person.

2. Projection for [***] ending ____/____/___:


[***] Confidential treatment requested pursuant to a request for confidential treatment filed with the Securities and Exchange Commission. Omitted portions have been filed separately with the Commission.

18

EXHIBIT D

PRICE LIST AND MINIMUM PURCHASE REQUIREMENTS

Prices quoted in U.S. dollars                                             Nippon
-----------------------------
                                                                         Eurotec
Part Number                                                                Price
-----------                                                          -----------

010011     ALGO(TM)2 Newborn Hearing Screener                        $     [***]
           Includes: Screener with keyboard, Printer,
           Rollstand, Workstation with Platform, Acoustic
           Transducer Assembly (ATA) Cable, Patient
           Cable Assembly (PCA) and pre-amplifier
           cable, Acoustic Check Kit, Starter Kit of
           supplies


41000      ALGO(TM)2E Newborn Hearing Screener                       $     [***]
           Includes: Detachable screening module with
           laptop computer, Natus screening station with
           built-in storage, Printer for self-adhesive
           patient results labels, Patient Cable Assembly
           (PCA) and pre-amplifier cable, Acoustic
           Transducer Assembly (ATA) Cable, Acoustic
           Check Kit, Starter Kit of supplies

Replacement Parts for ALGO(TM) Newborn Hearing Screeners

040176     Acoustic Transducer Assembly (ATA) Cable                  $     [***]
040144     Acoustic Check Kit                                        $     [***]
040127     Patient Cable Assembly (PCA)                              $     [***]
040119     Pre-amplifier Cable                                       $     [***]
           ALGO 2 Carrying Case                                            [***]
           ALGO 2e Carrying Case                                           [***]
700090     Power Cord                                                $     [***]
900081     ALGO 2e Label Printer                                     $     [***]

Natus Screening Supplies for ALGO(TM) Newborn Hearing Screeners

040112     ALGO-COLORADO PAK - Case Of 288 Screenings                $     [***]
           Includes: 8 boxes/ 288 pairs Ear Coupiers(R)
           disposable ear phones, 320 Jelly Button(R)Sensors

__________

[***] Confidential treatment requested pursuant to a request for confidential treatment filed with the Securities and Exchange Commission. Omitted portions have been filed separately with the Commission.

19

EXHIBIT D

PRICE LIST AND MINIMUM PURCHASE REQUIREMENTS

Prices quoted in U.S. dollars.                                            NIPPON
------------------------------
                                                                         Eurotec
Part Number                                                                Price
-----------                                                          -----------

Printing Supplies for ALGO(TM)2e Newborn Hearing Screeners

900079    Printer Labels - Four rolls (560 labels)                   $     [***]

Individual Screening Supplies for ALGO(TM) Newborn Hearing Screeners
030097    Jelly Button(R) Sensors - Box of 50 triplets               $     [***]
040069    DriPrep(TM) Prepping Pads - Pouch of 25 pads               $     [***]
900072    NuPrep(R)Prepping Gel - One 1 oz. tube (28.35 g)           $     [***]

Natus Neonatal Supplies

040048 MiniMuffs(TM) Neonatal Noise Attenuators - 36 pairs $ [***] 040048 MiniMuffs(TM) Neonatal Noise Attenuators - 288 pairs $ [***]

Natus Software for ALGO(TM) Newborn Hearing Screeners

040181    70/40(TM) Screening Application Software                   $     [***]
040240    Algo DataBook(TM) NHS Data Tracking Software               $     [***]
900123    Time/Date Software                                         $     [***]

MINIMUM PURCHASE REQUIREMENTS

Period                                 Minimum Purchases
------                                 -----------------
Effective Date through First Six Months:    [***] Units                    [***]
Months Seven through Eighteen:              [***] Units                    [***]
Months Nineteen through Thirty:             [***] Units                    [***]
Months Thirty-One through Forty-two:        [***] Units                    [***]
Months Forty-three through Forty-eight:     [***] Units                    [***]
                                            -----
                                            [***] Units
                                            =====
__________

[***] Confidential treatment requested pursuant to a request for confidential treatment filed with the Securities and Exchange Commission. Omitted portions have been filed separately with the Commission.

20

EXHIBIT E

NATUS TRADEMARKS

NATUS(R)
ALGO 2(TM) Newborn Hearing Screener
ALGO 2e(TM) Newborn Hearing Screener
ALGO(TM) Newborn Hearing Screener
ALGO DataBook(TM) NHS Data Tracking System AABR(TM) Automated Auditory Brainstem Response Ear Couplers(TM) Disposables
Jelly Button(TM) Sensors
DriPrep(TM) Prepping Pads
MiniMuffs(TM)Neonatal Noise Attenuators
70/40/(TM) Screening Aplication


Exhibit F to the Distributor Agreement

LOAN AGREEMENT: UNIVERSAL TEST FIXTURE

This Agreement is made between Natus Medical Incorporated ("Natus"), a California corporation, and Nippon EUROTEC Co., Ltd.("Distributor"), and is intended to serve as Exhibit F to the Distributor Agreement between the parties dated June 22, 1998. Accordingly, the terms and conditions of the Distributor

Agreement are incorporated by reference herein.

The parties agree as follows:

1. Loan AGreement. Natus will loan a Universal Test Fixture ("UTF") to the Distributor identified above for use as a service and maintenance tool for a maximum period of time which is described in Paragraph 5 below. Distributor agrees that the UTF remains the property of Natus, and that Distributor must, at the request of Natus, return the UTF to Natus. Distributor agrees to follow all written procedures for operation of UTF, and to use UTF solely for the purposes for which it is intended, as described is the UTF Operating Procedures.

2. Definitions. The definitions in the Distributor Agreement apply throughout this Agreement. The UTF, including all information contained within the UTF, and the UTF Operating Procedures, which may include but is not limited to all written documentation, hardware, software or firmware contained within the UTF and its accompanying UTF Operating Procedures, constitute Confidential Information pursuant to Section 17 of the Distributor Agreement.

3. Trade Secrets. Distributor acknowledges and agrees that the contents of the UTF and the UTF Operating Procedures (Trade Secrets) are valuable property of Natus. Distributor will hold in confidence any Trade Secrets which are disclosed to Distributor pursuant to this Agreement, and will not disclose such Trade Secrets to any other person, firm, or corporation. Distributor agrees to take all reasonable steps to protect the secrecy of and avoid disclosure or unauthorized use of the Trade Secrets. Distributor will not, nor will Distributor allow or encourage any third party to modify, repair, reverse engineer, decompile, or disassemble the UTF without the express and prior written consent of Natus Medical Inc. The UTF is expressly recognized as proprietary and confidential under the provisions of the Distribution Agreement with respect to ss 17, "Confidentiality and Proprietary Rights."

4. Sole Authorized User. The UTF will be used only by trained and authorized technical services representatives of the Distributor. Distributor will provide the names of trained and authorized technical service representatives to the Company, and will not permit use of the UTF by other individuals or entities, nor will Distributor permit physical relocation of the UTF without the prior written consent of Natus Medical Inc.

5. Miscellaneous. This Agreement contains the entire agreement of the parties with respect to the subject matter hereof, and supersedes all prior oral and written agreements, negotiations, understandings and communications regarding subject matter. If any of the provisions of this Agreement are different from those in the Distributor Agreement, these terms apply insofar as


the UTF is concerned. Otherwise, the terms of the Distributor Agreement are incorporated herein mutatis mutandis. This Exhibit will be governed by and construed in accordance with the laws of the State of California, United States of America, as applied to agreements made and performed in the State of California, United States of America.

6. Term of Agreement. Breach by Distributor of any of these terms constitutes breach of the Distributor Agreement. The Agreement is effective only during the term of the Distributor Agreement between Natus Medical and Distributor.

Natus Representative                     Distributor Representative

By     /s/ W. H. Lawrenson                By  /s/ Nippon EUROTEC Co., Ltd.
       ------------------------               ----------------------------

Name      W. H. Lawrenson                Name
       ------------------------                ---------------------------

Title     CEO                            Title    Director
       ------------------------                ---------------------------

Date      7/13/98                        Date    June 22 1998

       ------------------------                 --------------------------


EXHIBIT 10.6.1

natus(R)

[LETTERHEAD OF NATUS]

ADDENDUM TO THE DISTRIBUTOR AGREEMENT BETWEEN
NATUS MEDICAL INC. AND NIPPON EUROTEC CO., LTD.,
EFFECTIVE JUNE 11, 1997

AGREEMENT PERTAINING TO NEW JAPANESE REGULATION
"GMP-I"

MANUFACTURER'S ADDRESS: 1501 Industrial Road, San Carlos, California 94070-4111, United States of America
(Natus Medical Inc.)

DISTRIBUTOR'S ADDRESS: Akasaka Daiichi Building, 9-17, Akasaka 4-chome,Minato-ku, Tokyo, 107-0052, Japan
(Nippon EUROTEC Co., Ltd.)

EFFECTIVE DATE: January 1, 2000

GMP-I AGREEMENT

This GMP-I Agreement ("Agreement"), effective as of January 1, 2000 (the "Effective Date") is entered into by and between Natus Medical Inc., a California corporation having offices at 1501 Industrial Road, San Carlos, California 94070-4111, United States of America ("Natus"), and Nippon Eurotec Co., Ltd. a corporation organized under the laws of Japan, having offices at Akasaka Daiichi Building, 9-17, Akasaka 4-chome, Minato-ku, Tokyo 107-0052 Japan
("Nippon Eurotec")

BACKGROUND

Nippon Eurotec desires to smoothly communicate with Natus in order to obtain such information from Natus as is required by the new Japanese Regulations for Quality Assurance of Imported Medical Device, or Good Manufacturing Practice - Import regulations ("GMP-I").


GMP-I Addendum to Distribution Agreement

Natus desires to disclose necessary information required for the GMP-I to Nippon Eurotec periodically and when need arises, on the terms and conditions set forth below:

Article 1. CONTROL OF MANUFACTURE FROM GMP-I REGULATIONS

1.1 Nippon Eurotec shall periodically get confirmation from Natus that the medical devices to be imported to Japan are manufactured under appropriate manufacturing and quality control in accordance with DIN EN ISO 9001/08.94, DIN EN 46001/09.96 and EC Directive 93/42/EEC Annex II, Article 3 applicable for specific devices.

Nippon Eurotec shall send every year, at Nippon EUROTEC's expense, an inspector to Natus' manufacturing site for GMP-I inspection. An annual inspection report shall be established with the person responsible for GMP at Natus (Natus' Management Representative).

3.2 Natus shall send each year at fixed period to Nippon Eurotec the latest CERTIFICATE TO FOREIGN GOVERNMENT (if available), issued by the Food and Drug Administration ("FDA") or an equivalent document, such as a copy of EN 46001 and/or ISO 9001 certificate, as well as the latest technical specifications, latest user manual and latest test manual of the medical devices to be imported to Japan, within the framework of GMP-I provisions.

Article 2. CHANGE OF SPECIFICATIONS AND/OR TEST METHOD

3.2 Nippon Eurotec shall request from Natus prompt transmission of information regarding changes to be made to future manufacturing methods, testing methods or other related issues which may have possible effects on the quality of the medical devices, as defined in the GMP-I Article 4, Paragraph 1, Number 2.

3.3 Natus shall send in due course to Nippon Eurotec pre-advice pertaining to all significant changes of technical specifications, test standards and others of the medical devices, and information on related measures which will be taken in this regard.

Article 3. DEFICIENCY REPORT

3.1 Nippon Eurotec shall request of Natus prompt transmission of information on the following matters related to the medical devices:

A. Information on suspension of manufacture, export or marketing, recall, disposal, and actions taken to prevent the occurrence or spread of public health hazards caused by the medical devices.

B. Other information on the quality of the medical devices, as defined in the GMP-I Article 4, Paragraph 1, Number 3.

3.2 Natus shall inform Nippon Eurotec of the above information immediately after

Page 2 of 4 3/16/2000


GMP-I Addendum to Distribution Agreement

this information is known to Natus, via fax, e-mail etc, and thereafter in writing, in full detail.

Article 4. PERSONS RESPONSIBLE FOR INFORMATION

4.1 Natus and Nippon Eurotec shall set up the method of transmitting information and designate the person responsible for the transmission of information as mentioned in above articles 2 and 3.

4.2 Persons responsible for the transmission of information as above are:

Natus Medical Inc.
Mr. Tom Waugh, Vice President, Operations Tel: 1-650-802-0400, Fax: 1-650-802-0401, E-mail: twaugh@natus.com

Nippon Eurotec Co., Ltd.
Mr. Masaaki Kuroiwa, General Manager, Marketing Division Tel: 81-(0)3-3475-0831, Fax: 81-(0)3-3403-8363, E-mail: mk07-eur@kt.rim.or.jp

Article 5. QUALITY CONTROL DURING TRANSPORT AND UPON RECEIPT

5.1 Nippon Eurotec shall request to Natus information on the methods of management and quality control during transport and receipt of the medical devices, as defined in the GMP-I Article 4, Paragraph 1, Numbers 4 and 5.

5.2 Natus shall assure that the medical devices are packed in following manner:

Double-corrugated cardboard external box, unglued foam inserts, Corrugated cardboard internal box, unglued foam inserts, Accessories and cables wrapped and boxed separately from device

Natus shall attach within the external packaging, three (3) complete sets of delivery inspection sheets (incoming inspection instructions). In cases of rejection of the medical devices by Nippon Eurotec on in-coming test, due to any defect, Nippon Eurotec shall return to Natus the defective medical devices in conformity with related provisions in the DISTRIBUTOR AGREEMENT.

Article 6. COMPLAINT FROM CUSTOMERS AND MEASURE TO BE TAKEN

In case of complaint from customers in Japan, Nippon Eurotec shall follow Natus' Complaint Handling Procedures, analyze the cases, and shall request that Natus investigate these cases, to take appropriate measures promptly and to respond to Nippon Eurotec with a written result of the investigation and necessary measures taken.

Article 7. MEASURES TO BE TAKEN IN CASE OF RECALL

Page 3 of 4 3/16/2000


GMP-1 Addendum to Distribution Agreement

Natus shall respond to Nippon Eurotec with the highest priority when Nippon Eurotec requests Natus to investigate causes of health hazard cases incurred in Japan which might have been due to deficiencies of medical devices. And thereafter Natus shall send to Nippon Eurotec a written report clarifying its investigation and conclusions, as per Natus' procedure for Adverse Event Reporting. Likewise, Nippon EUROTEC shall cooperate with Natus, when and if Nippon EUROTEC is requested by Natus to participate in investigations concerning Natus medical devices in Japan.

Nippon Eurotec shall return all medical devices which have been recalled by Natus, according to Natus Procedure, due to deficiency during manufacture control and transportation.

Article 8. TERM

This ADDENDUM to the DISTRIBUTOR AGREEMENT shall commence upon the Effective Date and continue in full force, and shall terminate in accordance with the provisions of DISTRIBUTOR AGREEMENT.

Article 9. INDEMINTY

Nippon EUROTEC warrants that the procedures herein comply with GMP-I regulations, and indemnifies and holds Natus harmless from any liability arising from any action by Nippon EUROTEC with respect to such GMP-I laws, regulations, or procedures, it being expressly understood that such GMP-I laws, regulations, or procedures are Japanese domestic laws, the responsibility for compliance of which rests with Nippon EUROTEC, as Natus' exclusive distributor.

IN WITNESS WHEREOF, the parties hereto have duly executed this ADDENDUM effective as of the effective Date.

NIPPON EUROTEC Co., Ltd.                     NATUS MEDICAL INC.

By: /s/ Masaaki Kuroiwa                      By: /s/ Thomas M. Waugh
   -----------------------------                ---------------------------

Name: Masaaki Kuroiwa                        Name: Thomas M. Waugh
     ---------------------------                 --------------------------
   (Typed or Printed)                           (Typed or Printed)

Title: General Manager                       Title: V. P. Operations
      --------------------------                   ------------------------
       Marketing Division


Page 4 of 4                                                          3/16/2000


EXHIBIT 10.7

EXCLUSIVE PATENT
LICENSE AGREEMENT
S91-093:LRM

AGREEMENT

Effective as of June 30, 1998 ("Effective Date") THE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY, a body having corporate powers under the laws of California ("STANFORD"), and NATUS MEDICAL INCORPORATED, a California corporation, having its principal place of business at 1501 Industrial Road, San Carlos, CA 94070-4111 ("NATUS"), agree as follows:

1. BACKGROUND

1.1 STANFORD has an assignment to U.S. Patent 5,383,469 entitled "Neonatal Hemolysis Detection Using End-Tidal Breath Sampler And Analyzer Apparatus" in the names of Drs. David Stevenson and Hendrik Vreman (herein "Invention(s)" and/or "469 Patent"), as described in Stanford Docket S91-093 and/or any Licensed Patent(s) as hereinafter defined, which may issue to such Invention(s).

1.2 STANFORD wishes to have Invention(s) perfected and marketed at the earliest possible time in order that products resulting therefrom may be available for public use and benefit.

1.3 NATUS wishes to acquire a license under the Inventions and Licensed Patent(s) (as hereinafter defined) to manufacture, use and sell Licensed Product(s) in the Licensed Field of Use (as hereinafter defined).

Confidential treatment has been requested for portions of this exhibit. The copy filed herewith omits the information subject to the confidentiality request. Omissions are designated as *****. A complete version of this exhibit has been filed separately with the Securities and Exchange Commission.


1.4 The Invention(s) were made in the course of research supported by the National Institutes of Health.

1.5 NATUS is the owner of all right title and interest in and to U.S. Patent 5,293,875 entitled "In Vivo Measures of End-Tidal Carbon Monoxide Concentration Apparatus and Methods" in the name of Robert T. Stone (herein `"875 patent").

1.6 STANFORD and NATUS were parties to a previous agreement concerning the Invention(s) and Licensed Patent(s) (herein "Original Agreement") which was terminated by NATUS on November 17, 1993.

2. DEFINITIONS

2.1 "Licensed Patent(s)" means any Letters Patent issued upon STANFORD's U.S. Patent Application serial number 829,843, filed January 31, 1992, including the information contained in such application, with respect to the Invention(s), any foreign patents, patent applications or like rights corresponding thereto, and/or divisions, continuations, or reissue thereof. As of the effective date hereof, the `469 Patent is the only issued or granted patent that is a Licensed Patent(s).

2.2 "Licensed Products(s)" means any product or part thereof in the Licensed Field of Use, the manufacture, use or sale of which is covered by a valid claim of an issued, unexpired Licensed Patent(s) directed to the Invention(s). A claim of an issued, unexpired Licensed Patent(s) shall be presumed to be valid unless and until it has been held to be invalid by a final judgement of a court of competent jurisdiction form which no appeal can be or is taken.

2

2.3 "Net Sales" means NATUS' invoiced sales for Licensed Product(s), less credit for returns, allowances, or trades, in the form in which it is sold or used, whether or not assembled (and excluding therefrom any disposables), less the following items but only insofar as they actually pertain to the disposition of such Licensed Product(s) by NATUS or sublicensee(s) and are included in such invoiced sales, and are separately billed:

(a) Taxes of any kind including, but not limited to import, export, excise, and sales taxes, use, value added and custom duties;

(b) Outbound transportation prepaid or allowed;

(c) Costs of installation and service at the place of use;

(d) Cost of training users of Licensed Product(s) actually incurred by NATUS or a sublicensee(s) and not reimbursed.

2.4 "Licensed Field of Use" means measuring end-tidal carbon monoxide in exhaled breath for the early diagnosis, and subsequent monitoring, in human neonatals of a susceptibility for developing hyperbilirubinemia (also known as "neonatal jaundice"). The Licensed Field of Use specifically excludes monitoring of gases for the purpose of determining physiological conditions other than human neonatal jaundice.

2.5 "Licensed Territory" means worldwide.

2.6 "Exclusive" means STANFORD shall not grant any other license under the Licensed Patent(s) in the Licensed Field of Use, except as expressly provided in Article 3 and 4 hereof.

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3. GRANT

3.1 STANFORD hereby grants and NATUS hereby accepts an exclusive license, including the right to grant sublicenses under the conditions set forth below, in the Licensed Field of Use, to make, use, and sell Licensed Product(s) in the Licensed Territory (herein "License").

3.2 Said License shall be Exclusive for a term commencing as of the Effective Date of the Agreement and ending seven (7) years thereafter, unless sooner terminated under Article 12 hereof.

3.3 Thereafter, said License shall be nonexclusive in perpetuity, unless sooner terminated under Article 12 hereof.

3.4 Notwithstanding the License granted herein, STANFORD shall retain the right to use and practice the Invention(s) and Licensed Patent(s) for its own research, clinical, or teaching purposes.

3.5 Any sublicense granted by NATUS under this Agreement shall be subject and subordinate to terms and conditions of this Agreement, except:

(a) Sublicense terms and conditions shall state that any sublicensee(s) shall not have any right to further sublicense; and

(b) The earned royalty rate of any such sublicense may be higher than those stated in Paragraph 5.1 of this Agreement. Any such sublicense also shall expressly include the provisions of Articles 6, 7, and 8 for the benefit of STANFORD. Such sublicense shall also provide for the transfer of all obligations, including the payment of royalties specified in such sublicenses,

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to STANFORD or its designee, in the event that this Agreement is terminated under Article 12 hereof.

3.6 NATUS shall not receive anything tangible of value in lieu of cash payments based upon payment obligations of any sublicense under this Agreement, without the prior written consent of STANFORD, which will not be withheld unreasonably.

3.7 NATUS may retain all non-royalty License related revenues attributable to the sublicensing of the Licensed Patent(s) in excess of that which is payable to STANFORD pursuant to Article 5 and one-half of all earned royalty revenues attributable to the sublicensing of the Licensed Patent(s) in excess of that which is payable to STANFORD pursuant to Article 5.

3.8 Subject to STANFORD's consideration of its role as the public's trustee for this invention, the period of exclusivity may be extended by mutual agreement of the parties.

4. GOVERNMENT RIGHTS

This Agreement is subject to all of the terms and conditions of Title 35 United States Code Sections 200 through 204, and LICENSEE agrees to take al reasonable action necessary on its part as licensee to enable STANFORD to satisfy its obligation thereunder, relating to Invention(s).

5. ROYALTIES

5.1 In consideration of the Original Agreement NATUS paid to STANFORD a non-refundable, non-creditable license fee of [***] and issued to STANFORD
[***] of NATUS stock.


[***] Confidential treatment requested pursuant to a request for confidential treatment filed with the Securities and Exchange Commission. Omitted portions have been filed separately with the Commission.

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5.2 Now, in consideration for the rights granted herein; NATUS, excluding its first [***] in Net Sales of Licensed Product(s), shall pay to STANFORD royalties of [***] on Net Sales of Licensed Products which are not disposables in countries where a Licensed Patent(s) has issued; and, [***] on Net Sales of Licensed Products which are not disposables in countries where no Licensed Patent(s) has issued.

5.3 In addition, beginning on July 1, 1999 and each July 1 thereafter, NATUS shall pay STANFORD an annual license maintenance royalty of [***]. Said maintenance royalties are non-refundable but they are fully creditable against earned royalties in the year in which they are due. Additionally, NATUS may take a credit against said maintenance royalties for additional insurance premiums that NATUS pays on Licensed Products pursuant to Paragraph 8.4 hereunder.

5.4 If this Agreement is not terminated in accordance with other provisions hereof, NATUS' obligation to pay royalties hereunder shall continue for so long as NATUS, by its activities would, but for the license granted herein, infringe a valid claim of an unexpired Licensed Patent(s) of STANFORD covering said activity.

5.5 The royalty on sales in currencies other than U.S. Dollars shall be calculated using the appropriate foreign exchange rate for such currency quoted by the Bank of America (San Francisco) foreign exchange desk, on the close of business on the last banking day of each calendar quarter. Royalty payments to STANFORD shall be in U.S. Dollars and shall be net of all non-U.S. taxes.


[***] Confidential treatment requested pursuant to a request for confidential treatment filed with the Securities and Exchange Commission. Omitted portions have been filed separately with the Commission.

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6. REPORTS, PAYMENTS AND ACCOUNTING

6.1 Semi-Annual Earned Royalty Payment and Report. NATUS shall make written reports and earned royalty payments to STANFORD within ninety (90) days after the end of June and December throughout the term of this Agreement. This report shall state the number, description and aggregate Net Sales of Licensed Product(s) during such completed six-month period, and resulting calculation pursuant to Paragraph 5.2 of earned royalty payment due STANFORD for such completed six-month period. Concurrent with the making of each such report, NATUS shall include payment due STANFORD of royalties for the six-month period covered by such report.

6.2 The royalty payments set forth in this Agreement shall, if overdue, bear interest until payment at a per annum rate of the prime rate in effect at the Bank of America (San Francisco) on the due date. The payment of such interest shall not foreclose STANFORD from exercising any other rights it may have as a consequence of the delay in payment.

6.3 Accounting. NATUS agrees to keep records for a period of three (3) years showing the manufacture, sales, use and other disposition of Licensed Product(s) sold or otherwise disposed of under terms of this Agreement in sufficient detail to enable the royalties payable hereunder by NATUS to be determined, and further agrees to permit its books and records to be audited by an independent Certified Public Accountant, mutually acceptable to STANFORD and NATUS, from time to time to the extent necessary to verify the reports required by Paragraph 5.2. Such audit is to be made during NATUS' normal business hours and with reasonable advance notice to NATUS at the expense of STANFORD, except in the event

7

that the results of such audit reveal a discrepancy in NATUS' favor of five percent (5%) or more, then the audit expenses shall be paid by NATUS.

6.4 Progress Report. On or before September 1 of each year until NATUS markets a Licensed Product(s), NATUS shall make a written annual report to STANFORD covering the preceding year ending June 30, regarding the progress of NATUS toward commercial use of Licensed Product(s). Such report shall include information sufficient to enable STANFORD to satisfy reporting requirements of the U.S. Government pursuant to Public Law 96-517.

7. NEGATION OF WARRANTIES

7.1 Nothing in this Agreement is or shall be construed as:

(a) A warranty or representation by STANFORD as to the validity or scope of any Licensed Patent(s);

(b) A warranty or representation that anything made, used, sold, or otherwise disposed of under any license granted in this Agreement is or will be free from infringement of patents, copyrights, and other rights of third parties;

(c) An obligation to bring or prosecute actions or suits against third parties for infringement;

(d) Granting by implication, estoppel, or otherwise any licenses or rights under patents or other rights of STANFORD or other persons other than Licensed Patent(s), regardless of whether such patents or other rights are dominant or subordinate to any Licensed Patent(s).

7.2 Except as expressly set forth in this Agreement, STANFORD MAKES NO REPRESENTATIONS AND EXTEND NO WARRANTIES OF ANY KIND, EITHER

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EXPRESS OR IMPLIED. THERE ARE NO EXPRESS OR IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, OR THAT THE USE OF THE LICENSED PRODUCT(S) WILL NOT INFRINGE ANY PATENT, COPYRIGHT, TRADEMARK, OR OTHER RIGHTS OR ANY OTHER EXPRESS OR IMPLIED WARRANTIES.

Infringement, as determined by an issued legal judgement from which no appeal can be or is taken which results in the termination of sales of Licensed Product(s), or which results in obligations to pay royalties or fees to a third party in order to continue sales of Licensed Product(s), shall terminate NATUS' obligations to pay royalties under this Agreement provided that if any claims of the Licensed Patent(s) remain valid, STANFORD and NATUS agree to negotiate an appropriately reduced royalty structure.

8. INDEMNITY

8.1 NATUS agrees to indemnify, hold harmless, and defend STANFORD, Stanford Health Services or UCSF-Stanford Health Care and their respective trustees, officers, employees, students, and agents against any and all claims of death, illness, personal injury, and property damage arising out of the manufacture, use, sale, or other disposition of Invention(s), Licensed Patent(s), or Licensed Product(s) by NATUS, or their customers.

8.2 STANFORD shall not liable for any indirect, special, consequential, or other damages whatsoever, whether grounded in tort (including negligence), strict liability, contract or otherwise. STANFORD shall not have any responsibilities or liabilities whatsoever with respect to Licensed Product(s).

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8.3 NATUS shall at all times comply, through insurance or self-insurance, with all statutory workers' compensation and employers' liability requirements covering any and all employees with respect to activities performed under this Agreement.

8.4 In addition to the foregoing, NATUS shall maintain, during the term of this Agreement, Comprehensive General Liability Insurance, including Products Liability Insurance, with reputable and financially secure insurance carrier(s) to cover the activities of NATUS. Such insurance shall provide minimum limits of liability of [***] and shall include STANFORD, UCSF-Stanford Health Care, Stanford Health Services, their trustees, directors, officers, employees, students, and agents as additional insured. Such insurance shall be written to cover claims incurred, discovered, manifested, or made during or after the expiration of this Agreement and should be placed with carriers with ratings of at least A- as rated by A.M. Best. Within 15 days of the Effective Date of this Agreement, NATUS shall furnish a Certificate of Insurance evidencing primary coverage and additional insured requirements and requiring thirty (30) days prior written notice of cancellation or material change to STANFORD. NATUS shall advise STANFORD, in writing, that it maintains excess liability coverage (following form) over primary insurance for at least the minimum limits set forth above. All such insurance of NATUS shall be primary coverage; insurance of STANFORD, UCSF-Stanford Health Care, and Stanford Health Services shall be excess and noncontributory.


[***] Confidential treatment requested pursuant to a request for confidential treatment filed with the Securities and Exchange Commission. Omitted portions have been filed separately with the Commission.

10

9. PROMOTIONAL ADVERTISING

NATUS agrees not to identify STANFORD in any promotional advertising or other promotional materials to be disseminated to the public or any portion thereof or to use the name of any STANFORD faculty member, employee, or student or any trademark, service mark, trade name, or symbol of STANFORD, Stanford Health Services or UCSF-Stanford Health Care or that is associated with either of them, without STANFORD's prior written consent. Specifically granted by this Agreement is the right to use the following language in promotional advertising and in promotional material:

"This product is under license from Stanford University."

Notwithstanding the foregoing, NATUS is free to use for any purpose any matter, material and/or published article in the public domain or which is available from sources other than STANFORD without STANFORD's prior written consent, including, by way of example and not of limitation, articles published in the Journal of Medicine.

10. INFRINGEMENT BY THIRD PARTIES: PROTECTION OF PATENTS

10.1 NATUS shall promptly inform STANFORD of any suspected infringement of any Licensed Patent(s) by a third party, and STANFORD shall promptly notify NATUS of any such infringement. During the Exclusive period of this Agreement, STANFORD and NATUS each shall have the right to institute an action for infringement of the Licensed Patent(s) against such third party in accordance with the following:

(a) If STANFORD and NATUS agree to institute suit jointly, the suit shall be brought in both their names, the legal fees and out-of-pocket costs thereof shall be borne equally, and any recovery or settlement shall be shared

11

equally. NATUS and STANFORD shall agree to the manner in which they shall exercise control over such action. Either NATUS or STANFORD may, if it so desires, also be represented by separate counsel of its own selection, the fees for which counsel shall be paid by the party desiring separate counsel;

(b) In the absence of agreement to institute a suit jointly, STANFORD may institute suit, and, at its option, join NATUS as a plaintiff. STANFORD shall bear the entire cost of such litigation and shall be entitled to retain the entire amount of recovery or settlement;

(c) In the absence of agreement to institute jointly and if STANFORD notifies NATUS that is has decided not to join in or institute a suit as provided in (a) or (b) above, NATUS may institute and, at its option, join STANFORD as a plaintiff. NATUS shall bear the entire cost of such litigation and shall be entitled to retain the entire amount of any recovery or settlement;

(d) If STANFORD decides to institute suit, then it shall notify NATUS in writing. NATUS' failure to notify STANFORD in writing within fifteen (15) days after the date of the notice, that it will join in enforcing the patent pursuant to the provisions hereof, shall be deemed conclusively to be NATUS' assignment to STANFORD of all rights, causes of action, and damages resulting from any such alleged infringement and STANFORD shall be entitled to retain the entire amount of any recovery or settlement. Furthermore, at its option, STANFORD may join NATUS as plaintiff;

12

(e) If NATUS decides to institute suit, then it shall notify STANFORD in writing. STANFORD's failure to notify NATUS in writing within fifteen (15) days after the date of the notice, that it will join in enforcing the patent pursuant to the provisions hereof, shall be deemed conclusively to be STANFORD's assignment to NATUS of all rights, causes of action, and damages resulting from any such alleged infringement and NATUS shall be entitled to retain the entire amount of any recovery or settlement. Furthermore, at its option, NATUS may join STANFORD as plaintiff.

10.2 Should either NATUS or STANFORD commence suit under the provisions of Paragraph 10.1 and thereafter elect to abandon the same, it shall give timely notice to the other party who may, if it so desires, continue prosecution of such suit provided, however, that the sharing of expenses and any recovery in such suit shall be as agreed upon between STANFORD and NATUS.

11. COMMERCIAL APPLICATION

11.1 As an inducement to STANFORD to enter into this AGREEMENT, NATUS agrees to use reasonable efforts and diligence to proceed with the development, manufacture, and sale or lease of Licensed Product(s) and to diligently develop markets for the Licensed Products(s). STANFORD's sole remedy for breach of this clause shall be the termination of this Agreement in accordance with Article 12 hereof.

11.2 If sales of Licensed Product(s) have not been made for a period of two
(2) years during the term of this Agreement, then STANFORD may terminate this Agreement.

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12. TERMINATION

12.1 NATUS may terminate this Agreement at any time by giving STANFORD notice in writing at least thirty (30) days in advance of a termination date selected by NATUS.

12.2 STANFORD may terminate this Agreement if NATUS:

(a) Is in default in payment of royalty or providing of reports;

(b) Is in breach of any material provision hereof; or

(c) Provides any materially false report; and

NATUS fails to remedy any such default, breach, or false report within (30) days after written notice thereof by STANFORD.

12.3 Surviving any termination are:

(a) NATUS' obligation to pay royalties, accrued or accruable;

(b) Any cause of action or claim of NATUS or STANFORD, accrued or to accrue, because of any breach or default by the other party; and

(c) The provisions of Articles 6, 7, and 8.

13. ASSIGNMENT

This Agreement may not be assigned without STANFORD's prior written consent, which will not be unreasonably withheld.

14. ARBITRATION

14.1 Any controversy arising under or related to this Agreement, or any disputed claim by either party against the other under this Agreement, excluding any dispute relating to patent validity or infringement arising under this Agreement, shall be settled by arbitration in accordance

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with the Licensing Agreement Arbitration Rules of the American Arbitration Association. Upon request of either party, arbitration will be by:

(a) A third party arbitrator mutually agreed upon in writing by NATUS and STANFORD within thirty (30) days of such arbitration request; or

(b) A member of the American Arbitration Association, mutually agreed upon by STANFORD and NATUS. Judgment upon the award rendered by the Arbitrator may be entered in any court having jurisdiction thereof.

14.2 The parties shall be entitled to discovery in like manner as if the arbitration were a civil suit in United States District Court for the Northern District of California.

14.3 Any arbitration shall be held at Stanford, California, unless the parties hereto mutually agree in writing to another place.

15. NOTICES

All notices under this Agreement shall be deemed to have been fully given when done in writing and deposited in the United States mail, registered or certified, and addressed as follows:

To STANFORD:    Office of Technology Licensing
                Stanford University
                900 Welch Road, Suite 350
                Palo Alto, CA  94304

                Attention:  Director, Technology Licensing

To NATUS:       Natus Medical, Inc.
                1501 Industrial Blvd.
                San Carlos, CA  94070-4111
                Attention: Tim C. Johnson, President

Either party may change its address upon written notice to the other party.

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16. WAIVER

None of the terms, covenants, and conditions of this Agreement can be waived except by the written consent of the party waiving compliance.

17. APPLICABLE LAW

This Agreement shall be construed, interpreted, and applied in accordance with the substantive laws of the State of California.

IN WITNESS THEREOF, the parties hereto have executed this

Agreement in duplicate originals by their duly authorized officers or representatives.

THE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY

By  /s/ Katherine Ku
   --------------------------------------

Title  Director, Technology Licensing
      -----------------------------------

Date July 4, 1998

NATUS MEDICAL, INC.

By  /s/ Tim C. Johnson
   --------------------------------------

Title President
     ------------------------------------

Date June 30, 1998

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EXHIBIT 10.8

LEASE AGREEMENT

between

SAN CARLOS CO-TENANCY
as "Landlord"

and

NATUS MEDICAL, INC.
as "Tenant"


TABLE OF CONTENTS

SECTION                                                                    PAGE
-------                                                                    ----
 1.     PREMISES......................................................       5
 2.     TERM; POSSESSION..............................................       5
 3.     RENT .........................................................       6
 4.     SECURITY DEPOSIT .............................................      10
 5.     USE AND COMPLIANCE WITH LAWS .................................      10
 6.     TENANT IMPROVEMENTS & ALTERATIONS ............................      13
 7.     MAINTENANCE AND REPAIRS ......................................      15
 8.     TENANT'S TAXES ...............................................      17
 9.     UTILITIES AND SERVICES .......................................      17
 10.    EXCULPATION AND INDEMNIFICATION ..............................      18
 11.    INSURANCE ....................................................      19
 12.    DAMAGE OR DESTRUCTION ........................................      21
 13.    CONDEMNATION .................................................      22
 14.    ASSIGNMENT AND SUBLETTING ....................................      24
 15.    DEFAULT AND REMEDIES .........................................      27
 16.    LATE CHARGE AND INTEREST .....................................      29
 17.    WAIVER .......................................................      29
 18.    ENTRY, INSPECTION AND CLOSURE ................................      29
 19.    SURRENDER AND HOLDING OVER ...................................      30
 20.    ENCUMBRANCES .................................................      31
 21.    ESTOPPEL CERTIFICATES AND FINANCIAL STATEMENTS ...............      32
 22.    NOTICES ......................................................      33
 23.    ATTORNEYS' FEES ..............................................      33
 24.    QUIET POSSESSION .............................................      33
 25.    SECURITY MEASURES ............................................      33
 26.    FORCE MAJEURE ................................................      33
 27.    RULES AND REGULATIONS ........................................      34
 28.    LANDLORD'S LIABILITY .........................................      34
 29.    CONSENTS AND APPROVALS .......................................      34
 30.    BROKERS ......................................................      34
 31.    RELOCATION OF PREMISES .......................................      35
 32.    WAIVER OF RIGHT TO JURY TRIAL ................................      35
 33.    ENTIRE AGREEMENT .............................................      35
 34.    MISCELLANEOUS ................................................      35

i

35. AUTHORITY .................................................... 36

ii

INDEX OF DEFINED TERMS

ADA................................ 16     Second Expansion Premises
Additional Rent....................  8      Commencement Date..............  5
Alterations........................ 14     Second Expansion Premises
Award.............................. 23      Rent Commencement Date.........  6
Broker............................. 35     Security Deposit................ 10
Building Rules..................... 34     Service Failure................. 18
Building Systems................... 11     Sublease Profits................ 25
Buildings..........................  5     Taxes...........................  8
Claims............................. 19     Tenant Improvements............. 14
Condemnation....................... 23     Tenant's Share..................  8
Condemnor.......................... 23     Tenant's Taxes.................. 17
Controls........................... 17     Term............................  5
Date of Condemnation............... 23     Termination Premises
Encumbrance........................ 32      Termination Date...............  6
Environmental Losses............... 11     Trade Fixtures.................. 15
Environmental Requirements......... 11     Transfer........................ 24
Event of Default................... 27     Transferee...................... 25
Expiration Date....................  5     Vistors......................... 11
First Expansion Premises
 Commencement Date.................  5
First Expansion Premises
 Rent Commencement Date............  5
Handled by Tenant.................. 11
Handling by Tenant................. 11
Hazardous Materials................ 11
HVAC............................... 11
Interest Rate...................... 30
Landlord's Work.................... 15
Laws...............................  7
Mortgagee.......................... 32
Operating Costs....................  7
Parking Facility...................  5
Permitted Hazardous Materials...... 12
Premises...........................  5
Project............................  5
Property...........................  5
Property Manager................... 20
Proposed Transferee................ 25
Rent............................... 10
Rental Tax......................... 17
Representatives.................... 11
Scheduled First Expansion
 Premises Commencement Date........  5
Scheduled Second Expansion
 Premises Commencement Date........  6

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BASIC LEASE INFORMATION

Lease Date:             For identification purposes only, the date of this Lease
                        is August 24, 1998

Landlord:               SAN CARLOS CO-TENANCY, a tenancy in common

Tenant:                 NATUS MEDICAL, INC., a California corporation

Project:                San Carlos Commerce Centre

Rentable Area of
Project:                Approximately 103,064 square feet

Buildings:              Three (3) buildings (each a "Building") in which the
                        Premises are located in San Carlos Commerce Centre, as
                        shown on Exhibit A attached hereto

Rentable Area of
Buildings:                      Building at 1501 and 1509 Industrial Road -
                        Approximately 16,700 square feet

                                Building at 1541, 1547 and 1549 Industrial Road
                        - Approximately 14,400 square feet

                                Building at 1551, 1555 and 1559 Industrial Road
                        - Approximately 17,475 square feet

Premises:                       Suite Addresses: 1501, 1547 and 1541 Industrial
                        Road, San Carlos, CA, plus 1551 Industrial Road, San
                        Carlos, CA until the Termination Premises Termination
                        Date (as hereinafter defined)

                                Rentable Area: Approximately 24,130 square feet
                        (for the Suites located at 1501, 1547 and 1541
                        Industrial Road), and approximately 3,825 square feet
                        for the Suite at 1551 Industrial Road

Existing Premises:      Suite Address: 1501 Industrial Road, San Carlos, CA
                        Rentable Area: Approximately 11,900 square feet

First Expansion         Suite Address: 1541 Industrial Road, San Carlos, CA
Premises:               Rentable Area: Approximately 7,154 square feet

Second Expansion        Suite Address: 1547 Industrial Road, San Carlos, CA
Premises:               Rentable Area: Approximately 5,076 square feet

Termination             Suite Address: 1551 Industrial Road, San Carlos, CA
Premises:               Rentable Area: Approximately 3,825 square feet

                                      -1-

Term:                   Commencing November 15, 1998 and continuing until sixty
                        (60) full calendar months (plus any partial month at the
                        beginning of the Term) following the Second Expansion
                        Premises Rent Commencement Date (as hereinafter defined)

Existing Premises
Commencement Date:      November 15, 1998

Scheduled First
Expansion Premises
Commencement Date:      November 15, 1998

First Expansion
Premises Rent           Forty-five (45) days after the First Expansion Premises
Commencement Date:      Commencement Date

Scheduled Second
Expansion Premises
Commencement Date:      November 15, 1998

Second Expansion
Premises Rent           Forty-five (45) days after the Second Expansion Premises
Commencement Date:      Commencement Date

Termination Premises
Termination Date:       January 31, 1999

Expiration Date:        The last day of the 60th full calendar month following
                        the Second Expansion Premises Rent Commencement Date

Base Rent for First             Months following the First Expansion Premises
Expansion Premises      Rent Commencement Date:
commencing upon the     Months 01-12: $1.40 per rentable square foot per month
First Expansion         Months 13-24: $1.46 per rentable square foot per month
Premises Rent           Months 25-36: $1.51 per rentable square foot per month
Commencement Date:      Months 37-48: $1.57 per rentable square foot per month
                        Months 49-End of Term: $1.64 per rentable square foot
                                per month

Base Rent for Second            Months following the First Expansion Premises
                                                     -----
Expansion Premises      Rent Commencement Date:
commencing on the       Months 01-12: $1.40 per rentable square foot per month
-------------
Second Expansion        Months 13-24: $1.46 per rentable square foot per month
Premises Rent           Months 25-36: $1.51 per rentable square foot per month
Commencement Date:      Months 37-48: $1.57 per rentable square foot per month
                        Months 49-End of Term: $1.64 per rentable square foot
                                per month

                                      -2-

Base Rent for Existing  11/15/98 - 01/31/99: $14,750.12 per month
Premises and
Termination             02/01/99 - 12/31/00: $11,162.25 per month
Premises:
                        01/01/01 - 12/31/01: $1.60 per rentable square foot per
                                month
                        0l/01/02 - 12/31/02: $1.65 per rentable square foot per
                                month
                        01/01/03 - End of Term: $1.70 per rentable square foot
                                per month

Maintenance,            This is a "triple net lease" where Tenant is responsible
Operating Costs and     for maintenance, operating costs and taxes, all in
Taxes:                  accordance with the applicable provisions of the Lease.

Tenant's Share:         Existing Premises Commencement Date to First Expansion
                        Premises Rent Commencement Date:  15.26%

                        First Expansion Premises Rent Commencement Date to
                        Second Expansion Premises Rent Commencement Date: 22.20%

                        Second Expansion Premises Rent Commencement Date
                        through remainder of Term: 23.41%

Security Deposit:       $23,084.50, consisting of (a) a new deposit of
                        $l7,122.00, and (b) $5,962.50 from the Existing Lease,
                        as defined in Section 38 below)

Landlord's Address      SAN CARLOS CO-TENANCY
for Payment of Rent:    c/o William Wilson & Associates
                        2929 Campus Drive, Suite 145
                        San Mateo, CA 94403

Landlord's Address      SAN CARLOS CO-TENANCY
for Notices:            c/o William Wilson & Associates
                        2929 Campus Drive, Suite 145
                        San Mateo, CA 94403
                        Attention:  Property Management

                        with a copy to:

                        SAN CARLOS CO-TENANCY
                        William Wilson & Associates
                        2929 Campus Drive, Suite 450
                        San Mateo, CA 94403
                        Attention: General Counsel

Tenant's Address        1501 Industrial Road
for Notices:            San Carlos, CA 94070

                                      -3-

Broker(s):              CB Richard Ellis, Inc. for Landlord,
                        BT Commercial for Tenant

Guarantor(s):           (none)

Property Manager:       William Wilson & Associates

Additional Provisions:  35.     Parking
                        36.     Right of First Offer
                        37.     Extension Option
                        38.     Existing Lease

Exhibits:
--------
Exhibit A:      The Premises (and Buildings)
Exhibit A-1:    The Existing Premises
Exhibit A-2:    The First Expansion Premises
Exhibit A-3:    The Second Expansion Premises
Exhibit A-4:    The Termination Premises
Exhibit B:      Construction Rider
Exhibit C:      Building Rules
Exhibit D:      Additional Provisions
Exhibit E:      Asbestos Notification Letter
Exhibit F:      List of Tenant's Chemicals

The Basic Lease Information set forth above is part of the Lease. In the event of any conflict between any provision in the Basic Lease Information and the Lease, the Lease shall control.

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THIS LEASE is made as of the Lease Date set forth in the Basic Lease Information, by and between the Landlord identified in the Basic Lease Information ("Landlord"), and the Tenant identified in the Basic Lease Information ("Tenant"). Landlord and Tenant hereby agree as follows:

1. PREMISES. Landlord hereby leases to Tenant, and Tenant hereby leases from Landlord, upon the terms and subject to the conditions of this Lease, the space identified in the Basic Lease Information as the Premises (the "Premises"), in the Buildings located at the addresses specified in the Basic Lease Information (the "Buildings"). The approximate configuration and location of the Premises is shown on Exhibit A. The approximate configuration and location of the Existing Premises is shown on Exhibit A-1. The approximate configuration and location of the First Expansion Premises is shown on Exhibit A-2. The approximate configuration and location of the Second Expansion Premises is shown on Exhibit A-3. The approximate configuration and location of the Termination Premises is

shown on Exhibit A-4. Landlord and Tenant agree that the rentable area of the Premises for all purposes under this Lease shall be the Rentable Area specified in the Basic Lease Information. The Buildings, together with the parking facilities serving the Buildings (the "Parking Facility"), and the parcel(s) of land on which the Buildings and the Parking Facility are situated (collectively, the "Property"), is part of the Project identified in the Basic Lease Information (the "Project").

2. TERM; POSSESSION. The term of this Lease (the "Term") for the Existing Premises and the Termination Premises shall commence on November 15, 1998 and, unless sooner terminated, shall expire on the Expiration Date set forth in the Basic Lease Information (the "Expiration Date").

The Term of this Lease for the First Expansion Premises shall commence ("First Expansion Premises Commencement Date") on the date Landlord delivers possession of the First Expansion Premises to Tenant. The parties anticipate that the First Expansion Premises Commencement Date will occur on or about the Scheduled First Expansion Premises Commencement Date set forth in the Basic Lease Information (the "Scheduled First Expansion Premises Commencement Date"); provided, however, that Landlord shall not be liable for any claims, damages or liabilities if the First Expansion Premises are not ready for occupancy by the Scheduled First Expansion Premises Commencement Date. When the First Expansion Premises Commencement Date has been established, Landlord and Tenant shall at the request of either party confirm the First Expansion Premises Commencement Date in writing. Tenant's obligation to pay Base Rent and Additional Rent for the First Expansion Premises shall commence ("First Expansion Premises Rent Commencement Date") on the date that is forty-five (45) days after the First Expansion Premises Commencement Date. Tenant's obligation to pay Base Rent and Additional Rent for the First Expansion Premises shall not commence until the First Expansion Premises Rent Commencement Date.

The Term of this Lease for the Second Expansion Premises shall commence ("Second Expansion Premises Commencement Date") on the date Landlord delivers possession of the Second Expansion Premises to Tenant. The parties anticipate that the Second Expansion Premises Commencement Date will occur on or about the Scheduled Second Expansion Premises Commencement Date set forth in the Basic Lease Information (the "Scheduled Second Expansion Premises Commencement Date"); provided, however, that Landlord shall not be liable for any

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claims, damages or liabilities if the Second Expansion Premises are not ready for occupancy by the Scheduled Second Expansion Premises Commencement Date. When the Second Expansion Premises Commencement Date has been established, Landlord and Tenant shall at the request of either party confirm the Second Expansion Premises Commencement Date and Expiration Date in writing. Tenant's obligation to pay Base Rent and Additional Rent for the Second Expansion Premises shall commence ("Second Expansion Premises Rent Commencement Date") on the date which is forty-five (45) days after the Second Expansion Premises Commencement Date. Tenant's obligation to pay Base Rent and Additional Rent for the Second Expansion Premises shall not commence until the Second Expansion Premises Rent Commencement Date.

The Term of the Lease with respect to the Termination Premises shall terminate ("Termination Premises Termination Date") on January 31,1999, and with respect to the Termination Premises Tenant shall remain liable for those obligations accruing through the later of (a) the Termination Premises Termination Date, or (b) the date Tenant actually vacates the Termination Premises.

Any entry by Tenant into any portion of the Premises prior to the applicable Commencement Date for such portion of the Premises shall be subject to all of the terms and conditions of this Lease, except that Tenant shall not be obligated to pay Base Rent or Additional Rent for (a) the First Expansion Premises prior to the First Expansion Premises Rent Commencement Date, or (b) the Second Expansion Premises prior to the Second Expansion Premises Rent Commencement Date.

3. RENT.

3.1 Base Rent. Tenant agrees to pay to Landlord the Base Rent for the Existing Premises, the Termination Premises, the First Expansion Premises and the Second Expansion Premises as set forth in the applicable provisions of the Basic Lease Information, without prior notice or demand, on the first day of each and every calendar month following the Existing Premises Commencement Date, the First Expansion Premises Rent Commencement Date, and the Second Expansion Premises Rent Commencement Date, as applicable, and continuing through the Term, except that Base Rent for the first full calendar month in which Base Rent is payable shall be paid upon Tenant's execution of this Lease and Base Rent for any partial month at the beginning of the Term shall be paid on the applicable Commencement Date. Base Rent for any partial month at the beginning or end of the Term shall be prorated based on the actual number of days in the month.

If the Basic Lease Information provides for any change in Base Rent by reference to years or months (without specifying particular dates), the change will take effect for the First Expansion Premises and the Second Expansion Premises on the applicable annual or monthly anniversary of the First Expansion Premises Rent Commencement Date.

3.2 Additional Rent: Operating Costs and Taxes.

(a) Definitions.

(1) "Operating Costs" means all costs of managing, operating, maintaining and repairing the Project, including all costs, expenditures, fees and charges for: (A) operation, maintenance and repair of the Project (including maintenance, repair and replacement of

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glass, the roof covering or membrane, and landscaping); (B) utilities and services (including telecommunications facilities and equipment, recycling programs and trash removal), and associated supplies and materials; (C) compensation (including employment taxes and fringe benefits) for persons who perform duties in connection with the operation, management, maintenance and repair of the Project, such compensation to be appropriately allocated for persons who also perform duties unrelated to the Project; (D) property (including coverage for earthquake and flood if carried by Landlord), liability, rental income and other insurance relating to the Project, and expenditures for deductible amounts paid under such insurance; (E) licenses, permits and inspections; (F) complying with the requirements of any law, statute, ordinance or governmental rule or regulation or any orders pursuant thereto (collectively "Laws"); (G) amortization of capital replacements, repairs or improvements to the Project, including capital replacements, repairs or improvements required to comply with Laws, with interest on the unamortized balance at the rate paid by Landlord on funds borrowed to finance such capital improvements (or, if Landlord finances such improvements out of Landlord's funds without borrowing, the rate that Landlord would have paid to borrow such funds, as reasonably determined by Landlord), over such useful life as Landlord shall reasonably determine in accordance with generally accepted accounting principles; (H) an office for the management of the Project, including expenses of furnishing and equipping such office and the rental value of any space occupied for such purposes; (I) property management fees not to exceed the rate of property management fees charged by owners of similar type and quality properties in the vicinity of the Project; (J) accounting, legal and other professional services incurred in connection with the operation of the Project and the calculation of Operating Costs and Taxes; (K) a reasonable allowance for depreciation on machinery and equipment used to maintain the Project and on other personal property owned by Landlord in the Project (including window coverings and carpeting in common areas, if any); (L) contesting the validity or applicability of any Laws that may affect the Project; (M) the Project's share of any shared or common area maintenance fees and expenses (including costs and expenses of operating, managing, owning and maintaining the Parking Facility and the common areas of the Project, and any fitness center in the Project,); and (N) any other cost, expenditure, fee or charge, whether or not hereinbefore described, which in accordance with generally accepted property management practices would be considered an expense of managing, operating, maintaining and repairing the Project. Operating Costs for any calendar year during which average occupancy of the Project is less than one hundred percent (100%) shall be calculated based upon the Operating Costs that would have been incurred if the Project had an average occupancy of one hundred percent (100%) during the entire calendar year.

Operating Costs shall not include (i) costs of special services rendered to individual tenants (including Tenant) for which a special charge is made; (ii) interest and principal payments on loans or indebtedness secured by the Buildings or penalties imposed for failure to perform when required under any such loans or indebtedness secured by the Buildings; (iii) costs of improvements for Tenant or other tenants of the Project; (v) costs of services or other benefits of a type which are not available to Tenant but which are available to other tenants or occupants, and costs for which Landlord is reimbursed by other tenants of the Project other than through payment of tenants' shares of Operating Costs and Taxes; (vi) utility charges paid by Tenant (and other tenants in the Project) directly to the applicable public utility company; (vii) leasing commissions, attorneys' fees and other expenses incurred in connection with leasing space in the Project or enforcing such leases; (viii) depreciation or amortization, other than as specifically enumerated in the definition of Operating Costs above; (ix) costs, fines or penalties incurred due to Landlord's violation of any Law; and (x) with respect to the Existing Premises, the costs incurred prior to December 31, 2000 of maintaining the structural soundness of the structural beams of the roof, foundations and exterior

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walls of the Building in which the Existing Premises are located; provided, however, for the purposes of this subsection (x) the definition of exterior walls of the Building shall exclude windows, glass, plate glass, doors, special store fronts and office entries, all of which exclusions from the definition of exterior walls of the Building may be included in Operating Costs.

(4) "Taxes" means: all real property taxes and general, special or district assessments or other governmental impositions, of whatever kind, nature or origin, imposed on or by reason of the ownership or use of the Project; governmental charges, fees or assessments for transit or traffic mitigation (including area-wide traffic improvement assessments and transportation system management fees), housing, police, fire or other governmental service or purported benefits to the Project; personal property taxes assessed on the personal property of Landlord used in the operation of the Project; service payments in lieu of taxes and taxes and assessments of every kind and nature whatsoever levied or assessed in addition to, in lieu of or in substitution for existing or additional real or personal property taxes on the Project or the personal property described above; any increases in the foregoing caused by changes in assessed valuation, tax rate or other factors or circumstances; and the reasonable cost of contesting by appropriate proceedings the amount or validity of any taxes, assessments or charges described above. Taxes shall not include any state and federal personal or corporate income taxes measured by the income of Landlord from all sources (other than taxes on rent at the Property), as well as any franchise, inheritance, or estate, succession, gift tax, or capital levy. Landlord agrees that for the purpose of this Lease any special assessments or special taxes for public improvements to the property will be amortized, with interest at the rate payable to the assessing or taxing authority, over the maximum time Landlord is permitted to pay such special assessment or special tax without penalty. To the extent paid by Tenant or other tenants as "Tenant's Taxes" (as defined in Section 8 - Tenant's Taxes), "Tenant's Taxes" shall be excluded from Taxes.

(5) "Tenant's Share" means the Rentable Area of the Premises divided by the total Rentable Area of the Project, as set forth in the Basic Lease Information. If the Rentable Area of the Project is changed or the Rentable Area of the Premises is changed by Tenant's leasing of additional space hereunder or for any other reason, Tenant's Share shall be adjusted accordingly.

(b) Additional Rent.

(1) Tenant shall pay Landlord as "Additional Rent" for each calendar year or portion thereof during the Term Tenant's Share of the sum of
(x) the amount of Operating Costs, and (y) the amount of Taxes.

(2) Prior to the Commencement Date and each calendar year thereafter, Landlord shall notify Tenant of Landlord's estimate of Operating Costs, Taxes and Tenant's Additional Rent for the following calendar year (or first partial year following the Commencement Date). Commencing on the Commencement Date, and in subsequent calendar years, on the first day of January of each calendar year and continuing on the first day of every month thereafter in such year, Tenant shall pay to Landlord one-twelfth (1/12th) of the Additional Rent, as reasonably estimated by Landlord for such full calendar year. If Landlord thereafter reasonably estimates that Operating Costs or Taxes for such year will vary from Landlord's prior estimate, Landlord may, by notice to Tenant, revise the estimate for such year (and Additional Rent shall thereafter be payable based on the revised estimate).

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(3) As soon as reasonably practicable after the end of each calendar year, Landlord shall furnish Tenant a statement with respect to such year, showing Operating Costs, Taxes and Additional Rent for the year, and the total payments made by Tenant with respect thereto. Unless Tenant raises any objections to Landlord's statement within ninety (90) days after receipt of the same, such statement shall conclusively be deemed correct and Tenant shall have no right thereafter to dispute such statement or any item therein or the computation of Additional Rent based thereon. If Tenant does object to such statement, then Landlord shall provide Tenant with reasonable verification of the figures shown on the statement and the parties shall negotiate in good faith to resolve any disputes. Any objection of Tenant to Landlord's statement and resolution of any dispute shall not postpone the time for payment of any amounts due Tenant or Landlord based on Landlord's statement, nor shall any failure of Landlord to deliver Landlord's statement in a timely manner relieve Tenant of Tenant's obligation to pay any amounts due Landlord based on Landlord's statement. In no event shall Operating Costs exceed one hundred percent (100%) of actual Operating Costs (including management fees) incurred by Landlord.

(4) If Tenant's Additional Rent as finally determined for any calendar year exceeds the total payments made by Tenant on account thereof, Tenant shall pay Landlord the deficiency within twenty (20) days of Tenant's receipt of Landlord's statement. If the total payments made by Tenant on account thereof exceed Tenant's Additional Rent as finally determined for such year, Tenant's excess payment shall be credited toward the rent next due from Tenant under this Lease. For any partial calendar year at the beginning or end of the Term, Additional Rent shall be prorated on the basis of a 365-day year by computing Tenant's Share of the Operating Costs and Taxes for the entire year and then prorating such amount for the number of days during such year included in the Term. Notwithstanding the termination of this Lease, Landlord shall pay to Tenant or Tenant shall pay to Landlord, as the case may be, within twenty
(20) days after Tenant's receipt of Landlord's final statement for the calendar year in which this Lease terminates, the difference between Tenant's Additional Rent for that year, as finally determined by Landlord, and the total amount previously paid by Tenant on account thereof.

If for any reason Taxes for any year during the Term are reduced, refunded or otherwise changed, Tenant's Additional Rent shall be adjusted accordingly. If Taxes are temporarily reduced as a result of space in the Project being leased to a tenant that is entitled to an exemption from property taxes or other taxes, then for purposes of determining Additional Rent for each year in which Taxes are reduced by any such exemption, Taxes for such year shall be calculated on the basis of the amount the Taxes for the year would have been in the absence of the exemption. The obligations of Landlord to refund any overpayment of Additional Rent and of Tenant to pay any Additional Rent not previously paid shall survive the expiration of the Term.

3.3 Payment of Rent. All amounts payable or reimbursable by Tenant under this Lease, including late charges and interest (collectively, "Rent"), shall constitute rent and shall be payable and recoverable as rent in the manner provided in this Lease. All sums payable to Landlord on demand under the terms of this Lease shall be payable within twenty (20) days after receipt of notice from Landlord of the amounts due. All rent shall be paid without offset, recoupment or deduction in lawful money of the United States of America to Landlord at Landlord's Address for Payment of Rent as set forth in the Basic Lease Information, or to such other person or at such other place as Landlord may from time to time designate.

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4. SECURITY DEPOSIT. On execution of this Lease, Tenant shall deposit with Landlord the amount specified in the Basic Lease Information as the Security Deposit, if any (the "Security Deposit"), as security for the performance of Tenants obligations under this Lease. Landlord may (but shall have no obligation to) use the Security Deposit or any portion thereof to cure any Event of Default under this Lease or to compensate Landlord for any damage Landlord incurs as a result of Tenant's failure to perform any of Tenant's obligations hereunder. In such event Tenant shall pay to Landlord within five (5) days after receipt of demand an amount sufficient to replenish the Security Deposit. If Tenant is not in default at the expiration or termination of this Lease, then within thirty
(30) days after Tenant vacates the Premises Landlord shall return to Tenant the Security Deposit or the balance thereof then held by Landlord and not applied as provided above. Landlord may commingle the Security Deposit with Landlord's general and other funds. Landlord shall not be required to pay interest on the Security Deposit to Tenant.

5. USE AND COMPLIANCE WITH LAWS.

5.1 Use. Provided that Natus Medical, Inc. has not assigned this Lease

or sublet any or all of the Premises other than to an Affiliate (it being intended that all rights pursuant to this provision are and shall be personal to the original Tenant under this Lease its Affiliates, and shall not be transferable or exercisable for the benefit of any Transferee other than an Affiliate [as the terms Affiliate and Transferee are hereinafter defined]), Tenant shall occupy and use the Premises for development, manufacturing and sale of medical devices, including warehousing, administrative and sales functions related thereto, and for no other use or purpose. Any Transferee (other than an Affiliate) shall occupy and use the Premises for general business office purposes, light industrial, office flex and research and development uses consistent with a high quality light industrial/research and development park and for no other use or purpose; provided, further that any Transferee shall not use heavy machinery in manufacturing, and shall fully comply with the provisions of Section 5.2 below. Tenant shall comply with all present and future Laws relating to Tenant's use or occupancy of the Premises (and make any repairs, alterations or improvements as required to comply with all such Laws), and shall observe the "Building Rules" (as defined in Section 27 - Rules and Regulations). Tenant shall not do, bring, keep or sell anything in or about the Premises that is prohibited by, or that will cause a cancellation of or an increase in the existing premium for, any insurance policy covering the Property or any part thereof. Tenant shall not permit the Premises to be occupied or used in any manner that will constitute waste or a nuisance, or disturb the quiet enjoyment of or otherwise annoy other tenants in the Building. Without limiting the foregoing, the Premises shall not be used to manufacture goods or products (except as permitted above for Natus Medical, Inc. and its Affiliates), for educational activities (except as incidental to the permitted use contained above), practice of medicine or any of the healing arts (except such limitation shall not be applicable to the research, development, manufacturing and sales of medical devices by Natus Medical, Inc. and its Affiliates, as provided above), providing social services, for any governmental use (including embassy or consulate use), or for personnel agency, customer service office (except as incidental to the permitted use contained above), studios for radio, television or other media, travel agency or reservation center operations or uses, so long as all of the exceptions contained in this sentence do not exceed the parking limitations contained in Section 35 of this Lease. Tenant shall not, without the prior consent of Landlord, (i) bring into the Building or the Premises anything that may cause substantial noise, odor or vibration, overload the floors in the Premises or the Building or any of the heating, ventilating and air-conditioning ("HVAC"), mechanical, plumbing, electrical, fire protection, life safety, or other systems in the Building ("Building Systems"), or jeopardize the structural integrity of the Building or any part

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thereof; (ii) connect to the utility systems of the Building any apparatus, machinery or other equipment other than typical office equipment and light industrial manufacturing equipment consistent with Tenant's permitted use contained hereinabove; or (iii) connect to any electrical circuit in the Premises any equipment or other load with aggregate electrical power requirements in excess of 80% of the rated capacity of the circuit.

5.2 Hazardous Materials.

(a) Definitions.

(1) "Hazardous Materials" shall mean any substance: (A) that now or in the future is regulated or governed by, requires investigation or remediation under, or is defined as a hazardous waste, hazardous substance, pollutant or contaminant under any governmental statute, code, ordinance, regulation, rule or order, and any amendment thereto, including the Comprehensive Environmental Response Compensation and Liability Act, 42 U.S.C.
(s)(s) 9601 et seq., and the Resource Conservation and Recovery Act, 42 U.S.C.
(s)(s) 6901 et seq., or (B) that is toxic, explosive, corrosive, flammable, radioactive, carcinogenic, dangerous or otherwise hazardous, including gasoline, diesel fuel, petroleum hydrocarbons, polychlorinated biphenyls (PCBs), asbestos, radon and urea formaldehyde foam insulation.

(2) "Environmental Requirements" shall mean all present and future Laws, orders, permits, licenses, approvals, authorizations and other requirements of any kind applicable to Hazardous Materials.

(3) "Handled by Tenant" and "Handling by Tenant" shall mean and refer to any installation, handling, generation, storage, use, disposal, discharge, release, abatement, removal, transportation, or any other activity of any type by Tenant or its agents, employees, contractors, licensees, assignees, sublessees, transferees or representatives (collectively, "Representatives") or its guests, customers, invitees, or visitors (collectively, "Visitors"), at or about the Premises in connection with or involving Hazardous Materials.

(4) "Environmental Losses" shall mean all costs and expenses of any kind, damages, including foreseeable and unforeseeable consequential damages, fines and penalties incurred in connection with any violation of and compliance with Environmental Requirements and all losses of any kind attributable to the diminution of value, loss of use or adverse effects on marketability or use of any portion of the Premises or Property.

(b) Tenant's Covenants. No Hazardous Materials shall be Handled by Tenant at or about the Premises or Property without Landlord's prior written consent, which consent may be granted, denied, or conditioned upon compliance with Landlord's requirements, all in Landlord's absolute discretion. Notwithstanding the foregoing, normal quantities and use of those Hazardous Materials customarily used in the conduct of general office activities, such as copier fluids and cleaning supplies and small amounts of chemicals listed on Exhibit F attached hereto used by Tenant in its light manufacturing under the permitted use provisions contained in Section 5.1 hereinabove (collectively, "Permitted Hazardous Materials"), may be used and stored at the Premises without Landlord's prior written consent, provided that Tenant's activities at or about the Premises and Property and the Handling by Tenant of all Hazardous Materials shall comply at all times with all Environmental Requirements; and provided, further, Tenant shall provide to

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Landlord on each January 15 and July 15 throughout the Term, an updated list of chemicals, and approximate quantities thereof, used by Tenant in the Premises during the previous six (6) months. At the expiration or termination of the Lease, Tenant shall promptly remove from the Premises and Property all Hazardous Materials Handled by Tenant at the Premises or the Property. Tenant shall keep Landlord fully and promptly informed of all Handling by Tenant of Hazardous Materials other than Permitted Hazardous Materials. Tenant shall be responsible and liable for the compliance with all of the provisions of this Section by all of Tenant's Representatives and Visitors, and all of Tenant's obligations under this Section (including its indemnification obligations under paragraph (e) below) shall survive the expiration or termination of this Lease.

(c) Compliance. Tenant shall at Tenant's expense promptly take all actions required by any governmental agency or entity in connection with or as a result of the Handling by Tenant of Hazardous Materials at or about the Premises or Property, including inspection and testing, performing all cleanup, removal and remediation work required with respect to those Hazardous Materials, complying with all closure requirements and post-closure monitoring, and filing all required reports or plans. All of the foregoing work and all Handling by Tenant of all Hazardous Materials shall be performed in a good, safe and workmanlike manner by consultants qualified and licensed to undertake such work and in a manner that will not interfere with any other tenant's quiet enjoyment of the Property or Landlord's use, operation, leasing and sale of the Property. Tenant shall deliver to Landlord prior to delivery to any governmental agency, or promptly after receipt from any such agency, copies of all permits, manifests, closure or remedial action plans, notices, and all other documents relating to the Handling by Tenant of Hazardous Materials at or about the Premises or Property. If any lien attaches to the Premises or the Property in connection with or as a result of the Handling by Tenant of Hazardous Materials, and Tenant does not cause the same to be released, by payment, bonding or otherwise, within twenty (20) days after the attachment thereof, Landlord shall have the right but not the obligation to cause the same to be released and any sums expended by Landlord (plus Landlord's administrative costs) in connection therewith shall be payable by Tenant on demand.

(d) Landlord's Rights. Landlord shall have the right, but not the obligation, to enter the Premises at any reasonable time, upon twenty-four
(24) hours prior oral or written notice (and without any notice requirement for any emergency) (i) to confirm Tenant's compliance with the provisions of this
Section 5.2, and (ii) to perform Tenant's obligations under this Section if Tenant has failed to do so after reasonable notice to Tenant. Notwithstanding anything contained to the contrary in this Section 5.2(d), Tenant shall have the right to accompany Landlord and Landlord's consultants through the Premises as observers, and to require such persons to comply with Tenant's reasonable security precautions. Landlord shall also have the right to engage qualified Hazardous Materials consultants to inspect the Premises and review the Handling by Tenant of Hazardous Materials, including review of all permits, reports, plans, and other documents regarding same. Tenant shall pay to Landlord on demand the reasonable costs of Landlord's consultants' fees and all costs incurred by Landlord in performing Tenant's obligations under this Section. Landlord shall use reasonable efforts to minimize any interference with Tenant's business caused by Landlord's entry into the Premises, but Landlord shall not be responsible for any interference caused thereby.

(e) Tenant's Indemnification. Tenant agrees to indemnify, defend, protect and hold harmless Landlord and its partners or members and its or their partners, members, directors, officers, shareholders, employees and agents from all Environmental Losses and all other claims,

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actions, losses, damages, liabilities, costs and expenses of every kind, including reasonable attorneys', experts' and consultants' fees and costs, incurred at any time and arising from or in connection with the Handling by Tenant of Hazardous Materials at or about the Property or Tenant's failure to comply in full with all Environmental Requirements with respect to the Premises.

(f) Asbestos. Tenant acknowledges that Tenant has received the asbestos notification letter attached as EXHIBIT E hereto pursuant to California Health and Safety Code Sections 25915 et seq. (as amended from time to time, the "Connelly Act"), disclosing the existence of asbestos in the Building. As part of Tenant's obligations under paragraph (c) of this Section, Tenant agrees to comply with the Connelly Act, including providing copies of Landlord's asbestos notification letter to all of Tenant's "employees" and "owners," as those terms are defined in the Connelly Act.

(g) Landlord's Responsibilities. Landlord, its employees and agents shall not use any of the Land or Building for any activities involving the use, generation, handling, release, threatened release, treatment, storage, discharge, disposal or transportation of any Hazardous Materials, except in such quantity or concentration that is customarily used, stored or disposed in the ordinary course of the business so long as such activity duly complies with applicable Laws and good business practice. If Landlord, its employees or agents violate the foregoing covenant resulting in an Environmental Claim (as hereinafter defined) with respect to the Premises, then Landlord agrees to (a) notify Tenant immediately of any such Environmental Claim and (b) cleanup any contamination to the extent required by applicable Laws to the extent not caused by Handling by Tenant, the costs of which clean up shall not be included in Operating Costs. The costs of any Environmental Claim for Hazardous Materials existing on the Land, or included in the Buildings, on the Commencement Date of this Lease shall not be included in Operating Costs. Landlord shall have the right to include in Operating Costs up to One Hundred Thousand Dollars ($100,000.00) per calendar year in the costs of any Environmental Claim for Hazardous Materials on the Land or in the Buildings caused by any third party from and after the Commencement Date or by underground flow of Hazardous Materials from and after the Commencement Date. Landlord agrees to use good faith efforts to pursue recovery from any third party which causes any contamination resulting in an Environmental Claim for Hazardous Materials on the Land or in the Building. Landlord will offset against Operating Costs any recovery from such third party to the extent that the costs of any Environmental Claim for Hazardous Materials caused by such third party has been previously included in Operating Costs. "Environmental Claim" means any claim, demand, action, cause of action, suit, damage, punitive damage, fine, penalty, expense, liability, criminal liability, judgment, or governmental investigation relating to remediation or compliance with requirements of Laws covering Hazardous Materials. The term "Environmental Claim" also includes any costs incurred in responding to efforts to require remediation and any claim based upon any asserted or actual breach or violation of any requirements of any Laws covering Hazardous Materials.

6. TENANT IMPROVEMENTS & ALTERATIONS.

6.1 Landlord and Tenant shall perform their respective obligations with respect to design and construction of any improvements to be constructed and installed in the Premises (the "Tenant Improvements"), as provided in the Construction Rider. Except for any Tenant Improvements to be constructed by Tenant as provided in the Construction Rider, Tenant shall not

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make any alterations, improvements or changes to the Premises ("Alterations"), without Landlord's prior written consent, which consent shall not be unreasonably withheld or delayed. Landlord shall not unreasonably withhold or delay consent to installation of any security system or telephone or data communication wiring which either requires any work outside the Premises or involves coordination or participation by the building engineers.
Notwithstanding the foregoing, Tenant shall have the right, upon prior notice to Landlord to be given at least two (2) Business Days prior to any installation, but without any approval rights by Landlord, to install wiring for a security system or telephone or data communication which wiring is solely within the Premises and does not require coordination or participation by the building engineers. Notwithstanding any other provision contained herein, Tenant shall not be required to obtain Landlord's prior consent for minor, non-structural Alterations that (a) do not affect any of the Building Systems, (b) are not visible from the exterior of the Premises, and (c) cost less than Twenty-Five Thousand Dollars ($25,000), so long as Tenant gives Landlord notice of the proposed Alterations at least ten (10) days prior to commencing the Alterations and complies with all of the following provisions (except that Tenant shall not be required to obtain Landlord's approval of any plans or specifications therefor). Any such Alterations shall be completed by Tenant at Tenant's sole cost and expense: (i) with due diligence, in a good and workmanlike manner, using new materials; (ii) in compliance with plans and specifications approved by Landlord; (iii) in compliance with the reasonable construction rules and regulations promulgated by Landlord from time to time; (iv) in accordance with all applicable Laws (including all work, whether structural or non-structural, inside or outside the Premises, required to comply fully with all applicable Laws and necessitated by Tenant's work); and (v) subject to all conditions which Landlord may in Landlord's reasonable discretion impose. Such conditions may include requirements for Tenant to: (i) provide payment or performance bonds or additional insurance (from Tenant or Tenant's contractors, subcontractors or design professionals); (ii) use contractors or subcontractors approved by Landlord, which approval shall not be unreasonably withheld or delayed, and use contractors designated by Landlord for Alterations affecting the structure of the Building, the Building Systems and the life safety systems of the Building (provided, that Landlord shall obtain bids from three [3] contractors for any such work costing more than Five Thousand Dollars [$5,000.00]); and (iii) remove all or part of the Alterations prior to or upon expiration or termination of the Term, as designated by Landlord in writing at the time Landlord consents to any such Alterations. If any work outside the Premises, or any work on or adjustment to any of the Building Systems, is required in connection with or as a result of Tenant's work, such work shall be performed at Tenant's expense by contractors designated by Landlord (provided, that Landlord shall obtain bids from three [3] contractors for any such work costing more than Five Thousand Dollars
[$5,000.00]). Landlord's right to review and approve (or withhold approval of) Tenant's plans, drawings, specifications, contractor(s) and other aspects of construction work proposed by Tenant is intended solely to protect Landlord, the Property and Landlord's interests. No approval or consent by Landlord shall be deemed or construed to be a representation or warranty by Landlord as to the adequacy, sufficiency, fitness or suitability thereof or compliance thereof with applicable Laws or other requirements. Except as otherwise provided in Landlord's consent, all Alterations shall upon installation become part of the realty and be the property of Landlord.

6.2 Before making any Alterations requiring Landlord's approval, Tenant shall submit to Landlord for Landlord's prior approval reasonably detailed final plans and specifications prepared by a licensed architect or engineer, a copy of the construction contract, including the name of the contractor and all subcontractors proposed by Tenant to make the Alterations and a copy of the contractor's license. Tenant shall reimburse Landlord upon demand for any reasonable

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expenses incurred by Landlord in connection with any Alterations made by Tenant. including reasonable fees charged by Landlord's contractors or consultants to review plans and specifications prepared by Tenant and to update the existing as-built plans and specifications of the Building to reflect the Alterations. Tenant shall obtain all applicable permits, authorizations and governmental approvals and deliver copies of the same to Landlord before commencement of any Alterations.

6.3 Tenant shall keep the Premises and the Project free and clear of all liens arising out of any work performed, materials furnished or obligations incurred by Tenant. If any such lien attaches to the Premises or the Project, and Tenant does not cause the same to be released by payment, bonding or otherwise within twenty (20) days after the attachment thereof, Landlord shall have the right but not the obligation to cause the same to be released, and any sums expended by Landlord (plus Landlord's reasonable administrative costs) in connection therewith shall be payable by Tenant on demand with interest thereon from the date of expenditure by Landlord at the Interest Rate (as defined in
Section 16.2 - Interest). Tenant shall give Landlord at least ten (10) days notice prior to the commencement of any Alterations and cooperate with Landlord in posting and maintaining notices of non-responsibility in connection therewith.

6.4 Subject to the provisions of Section 5 - Use and Compliance with Laws and the foregoing provisions of this Section, Tenant may install and maintain furnishings, equipment, movable partitions, business equipment and other trade fixtures ("Trade Fixtures") in the Premises. Tenant shall promptly repair any damage to the Premises or the Building caused by any installation or removal of such Trade Fixtures.

7. MAINTENANCE AND REPAIRS.

7.1 By taking possession of the Premises Tenant agrees that the Premises are then in a good and tenantable condition. Notwithstanding the foregoing, upon the respective Commencement Dates for the First Expansion Premises and the Second Expansion Premises, Landlord shall deliver the following ("Landlord's Work") in the First Expansion Premises and the Second Expansion Premises in good working order and clean condition: (i) roof, roof membrane and Building structure, (ii) windows and skylights, (iii) interior and exterior lighting.
(iv) existing electrical, and (v) existing plumbing. If, during the first thirty
(30) days following the First Expansion Premises Commencement Date, any Landlord's Work in the First Expansion Premises is not in the condition required by the preceding sentence, Tenant shall notify Landlord of the need for repair within thirty (30) days following the First Expansion Premises Commencement Date, and the repair shall be promptly completed by Landlord at no cost to Tenant. If, during the first thirty (30) days following the Second Expansion Premises Commencement Date, any Landlord's Work in the Second Expansion Premises is not in the condition required by the second preceding sentence, Tenant shall notify Landlord of the need for repair within thirty (30) days following the Second Expansion Premises Commencement Date, and the repair shall be promptly completed by Landlord at no cost to Tenant. Except for any repairs and maintenance which are the responsibility of Landlord pursuant to the two (2) immediately preceding sentences, each party shall be responsible for their respective maintenance and repair obligations contained in the provisions of this Lease commencing on the thirty-first (31st) day following the (a) First Expansion Premises Commencement Date, with respect to the First Expansion Premises, and (b) Second Expansion Premises Commencement Date, with respect to the Second Expansion Premises. The First Expansion Premises and the Second Expansion Premises shall be delivered to Tenant in compliance with the Americans with Disabilities Act of

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1990,42 U.S.C. 12101 et seq. as amended (the "ADA") as in effect and enforced as of the (a) First Expansion Premises Commencement Date, with respect to the First Expansion Premises, and (b) Second Expansion Premises Commencement Date, with respect to the Second Expansion Premises Commencement Date. Tenant shall be responsible to clean, maintain and repair the Premises, including providing janitorial services and disposal of trash; and to that end, during the Term, Tenant, at Tenant's expense but under the direction of Landlord (which direction shall be required only for those items costing more than Five Thousand Dollars
[$5.000.00]), shall repair and maintain the Premises, including, without limitation, the heating, ventilating and air conditioning system or systems serving the Premises, the electrical and plumbing systems within the Premises (including such portion of such systems outside of the Premises, but exclusively serving the Premises, and assuring the free flow of Tenant's sanitary sewer line to the main line serving the Premises), including the lighting and plumbing fixtures, the restrooms serving the Premises, interior stairways (if any) in the Premises, the interior and exterior glass, plate glass skylights, interior walls, floor coverings, ceiling (ceiling tiles and grid), Tenant Improvements, Alterations, fire extinguishers, outlets and fixtures, and any appliances (including dishwashers, hot water heaters and garbage disposers) in the Premises, in a first class condition similar to other similar type properties, and keep the Premises in a clean, safe and orderly condition. Prior to the Commencement Date Tenant shall provide Landlord with a copy of a service contract with a licensed commercial Heating, Ventilating and Air-conditioning maintenance company (which contract and company shall be subject to Landlord's prior approval), to maintain, on an ongoing basis (at least quarterly), the heating, ventilating and air-conditioning system serving the Premises.

7.2 Landlord shall (a) maintain or cause to be maintained in good order, condition and repair, the structural portions of the roof, foundations, floors and exterior walls of the Building, the public and common areas outside of the Building, and that portion of the electrical, water and sanitary sewer systems serving the Premises and located outside the exterior walls of the Premises, except such portion of such systems exclusively serving the Premises,
(b) caulk exterior window joints and concrete slabs and (c) paint on the exterior of the Building, all of which shall be included as a part of Operating Costs, subject to the terms and conditions contained in Section 3.2 of this Lease; provided, however, if any maintenance or repair of electrical, water and sanitary sewer systems outside the Premises is caused by Tenant's misuse of such system, the costs of such maintenance and repair shall not constitute a capital expenditure for the purposes of Section 3.2 of this Lease. Landlord shall be under no obligation to inspect the Premises. Tenant shall promptly report in writing to Landlord any defective condition known to Tenant which Landlord is required to repair. As a material part of the consideration for this Lease, Tenant hereby waives any benefits of any applicable existing or future Law, including the provisions of California Civil Code Sections 1932(1), 1941 and 1942, that allows a tenant to make repairs at its landlord's expense.

7.3 Landlord hereby reserves the right, at any time and from time to time, without liability to Tenant, and without constituting an eviction, constructive or otherwise, or entitling Tenant to any abatement of rent or to terminate this Lease or otherwise releasing Tenant from any of Tenant's obligations under this Lease:

(a) To make alterations, additions, repairs, improvements to or in or to decrease the size of area of, all or any part of the Buildings in which the Premises are located, the fixtures and equipment therein, and the Building Systems (except that Landlord shall not have any right under this provision to reduce the size of the Premises, or to permanently, materially and adversely

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affect Tenant's access to and use of the Premises, except only as may be required to comply with Laws or as a result of any fire or other casualty or Condemnation);

(b) To change the Buildings' name or street address;

(c) To install and maintain any and all signs on the exterior and interior of the Buildings;

(d) To reduce, increase, enclose or otherwise change at any time and from time to time the size, number, location, lay-out and nature of the common areas (including the Parking Facility) and other tenancies and premises in the Property and to create additional rentable areas through use or enclosure of common areas; and

(e) If any governmental authority promulgates or revises any Law or imposes mandatory or voluntary controls or guidelines on Landlord or the Property relating to the use or conservation of energy or utilities or the reduction of automobile or other emissions or reduction or management of traffic or parking on the Property (collectively "Controls"), to comply with such Controls, whether mandatory or voluntary, or make any alterations to the Property related thereto.

(f) In exercising its rights under this Section 7.3, Landlord agrees to use reasonable efforts to minimize any interruption to or disruption of Tenant's use of the Premises.

8. TENANT'S TAXES. "Tenant's Taxes" shall mean (a) all taxes, assessments, license fees and other governmental charges or impositions levied or assessed against or with respect to Tenant's personal property or Trade Fixtures in the Premises, whether any such imposition is levied directly against Tenant or levied against Landlord or the Property, (b) all rental, excise, sales or transaction privilege taxes arising out of this Lease (excluding, however, state and federal personal or corporate income taxes measured by the income of Landlord from all sources) imposed by any taxing authority upon Landlord or upon Landlord's receipt of any rent payable by Tenant pursuant to the terms of this Lease ("Rental Tax"), and (c) any increase in Taxes attributable to inclusion of a value placed on Tenant's personal property, Trade Fixtures or Alterations. Tenant shall pay any Rental Tax to Landlord in addition to and at the same time as Base Rent is payable under this Lease, and shall pay all other Tenant's Taxes before delinquency (and, at Landlord's request, shall furnish Landlord satisfactory evidence thereof). If Landlord pays Tenant's Taxes or any portion thereof, Tenant shall reimburse Landlord upon demand for the amount of such payment, together with interest at the Interest Rate from the date of Landlord's payment to the date of Tenant's reimbursement.

9. UTILITIES AND SERVICES.

9.1 [Intentionally Deleted].

9.2 Payment for Utilities and Services.

(a) If the temperature otherwise maintained in any portion of the Premises by the HVAC systems of the Building is affected as a result of any lights, machines or equipment used by Tenant in the Premises, or for any other reason, then Tenant shall be responsible, at Tenant's sole cost and expense, and at Tenant's option to install any machinery or equipment reasonably

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necessary to restore the temperature, including modifications to the standard air-conditioning equipment.

(b) Electricity, and any gas will be separately metered for the Premises. Landlord will pay for water and sanitary sewer, which will be billed back to Tenant as part of Operating Costs. Tenant shall pay prior to delinquency all charges for gas, electricity, telephone and other telecommunication services, janitorial service, trash pick-up, and all other services consumed by Tenant on or supplied to the Premises, and all taxes, levies, fees and surcharges thereon.

9.3 Interruption of Services. In the event of an interruption in or failure or inability to provide any services or utilities to the Premises or Building for any reason (a "SERVICE FAILURE"), such Service Failure shall not, regardless of its duration, impose upon Landlord any liability whatsoever, constitute an eviction of Tenant, constructive or otherwise, entitle Tenant to an abatement of rent or to terminate this Lease or otherwise release Tenant from any of Tenant's obligations under this Lease; provided, however, if any Service Failure is caused by Landlord's negligence and such Service Failure prevents Tenant from reasonably using a material portion of the Premises and Tenant in fact ceases to use such portion of the Premises for a period of five (5) consecutive Business Days, then Tenant shall be entitled to an abatement of Base Rent and Additional Rent with respect to the portion of the Premises that Tenant is prevented from using by reason of such Service Failure commencing on the sixth (6th) Business Day following the Service Failure and continuing until Tenant is no longer so prevented from using such portion of the Premises. Tenant hereby waives any benefits of any applicable existing or future Law, including the provisions of California Civil Code Section 1932(1), permitting the termination of this Lease due to such interruption, failure or inability.

10. EXCULPATION AND INDEMNIFICATION.

10.1 Landlord's Indemnification of Tenant. Landlord shall indemnify, protect, defend and hold Tenant harmless from and against any claims, actions, liabilities, damages, costs or expenses, including reasonable attorneys' fees and costs incurred in defending against the same ("Claims") asserted by any third party against Tenant for loss, injury or damage, to the extent such loss, injury or damage is caused by the willful misconduct or negligent acts or omissions of Landlord or its authorized representatives.

10.2 Tenant's Indemnification of Landlord. Tenant shall indemnify, protect, defend and hold Landlord and Landlord's authorized representatives harmless from and against Claims arising from (a) the acts or omissions of Tenant or Tenant's Representatives or Visitors in or about the Property, or (b) any construction or other work undertaken by Tenant on the Premises (including any design defects), or (c) any breach or default under this Lease by Tenant, or
(d) any loss, injury or damage, howsoever and by whomsoever caused, to any person or property, occurring in or about the Premises during the Term, excepting only Claims described in this clause (d) to the extent they are caused by the willful misconduct or negligent acts or omissions of Landlord or its authorized representatives.

10.3 Damage to Tenant and Tenant's Property. Landlord shall not be liable to Tenant for any loss, injury or other damage to Tenant or to Tenant's property in or about the Premises or the Property from any cause (including defects in the Property or in any equipment in the Property;

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fire, explosion or other casualty; bursting, rupture, leakage or overflow of any plumbing or other pipes or lines, sprinklers, tanks, drains, drinking fountains or washstands in, above, or about the Premises or the Property; or acts of other tenants in the Property). Tenant hereby waives all claims against Landlord for any such loss, injury or damage and the cost and expense of defending against claims relating thereto, including any loss, injury or damage caused by Landlord's negligence (active or passive). Notwithstanding any other provision of this Lease to the contrary, in no event shall Landlord or Tenant be liable to the other party for any punitive or consequential damages or damages for loss of business by Tenant or Landlord except for any liability which Tenant might have for holding over in the Premises beyond the expiration of the Term in accordance with the provisions of Section 19.2 of this Lease.

10.4 Survival. The obligations of the parties under this Section 10 shall survive the expiration or termination of this Lease.

11. INSURANCE.

11.1 Tenant's Insurance.

(a) Liability Insurance. Tenant shall maintain in full force throughout the Term, commercial general liability insurance providing coverage on an occurrence form basis with limits of not less than Two Million Dollars ($2,000,000.00) each occurrence for bodily injury and property damage combined, Two Million Dollars ($2,000,000.00) annual general aggregate, and Two Million Dollars ($2,000,000.00) products and completed operations annual aggregate. Tenant's liability insurance policy or policies shall: (i) include premises and operations liability coverage, products and completed operations liability coverage, broad form property damage coverage including completed operations, blanket contractual liability coverage including, to the maximum extent possible, coverage for the indemnification obligations of Tenant under this Lease, and personal and advertising injury coverage; (ii) provide that the insurance company has the duty to defend all insureds under the policy; (iii) provide that defense costs are paid in addition to and do not deplete any of the policy limits; (iv) cover liabilities arising out of or incurred in connection with Tenant's use or occupancy of the Premises or the Property; (v) extend coverage to cover liability for the actions of Tenant's Representatives; and
(iv) designate separate limits for the Property. Each policy of liability insurance required by this Section shall: (i) contain a cross liability endorsement or separation of insureds clause; (ii) provide that any waiver of subrogation rights or release prior to a loss does not void coverage; (iii) provide that it is primary to and not contributing with, any policy of insurance carried by Landlord covering the same loss; (iv) provide that any failure to comply with the reporting provisions shall not affect coverage provided to Landlord, its partners, property managers and Mortgagees; and (v) name Landlord, its partners, the Property Manager identified in the Basic Lease Information (the "Property Manager"), and such other parties in interest as Landlord may from time to time reasonably designate to Tenant in writing, as additional insureds. Such additional insureds shall be provided at least the same extent of coverage as is provided to Tenant under such policies. All endorsements effecting such additional insured status shall be at least as broad as additional insured endorsement form number CG 20 11 11 85 promulgated by the Insurance Services Office.

(b) Property Insurance. Tenant shall at all times maintain in effect with respect to any Alterations and Tenant's Trade Fixtures and personal property, commercial property insurance providing coverage, on an "all risk" or "special form" basis, in an amount equal to at least

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90% of the full replacement cost of the covered property. Tenant may carry such insurance under a blanket policy, provided that such policy provides coverage equivalent to a separate policy. During the Term, the proceeds from any such policies of insurance shall be used for the repair or replacement of the Alterations, Trade Fixtures and personal property so insured. Landlord shall be provided coverage under such insurance to the extent of its insurable interest and, if requested by Landlord, both Landlord and Tenant shall sign all documents reasonably necessary or proper in connection with the settlement of any claim or loss under such insurance. Landlord will have no obligation to carry insurance on any Alterations or on Tenant's Trade Fixtures or personal property.

(c) Requirements For All Policies. Each policy of insurance required under this Section 11.1 shall: (i) be in a form, and written by an insurer, reasonably acceptable to Landlord, (ii) be maintained at Tenant's sole cost and expense, and (iii) require at least thirty (30) days' written notice to Landlord prior to any cancellation, nonrenewal or modification of insurance coverage. Insurance companies issuing such policies shall have rating classifications of "A" or better and financial size category ratings of "VII" or better according to the latest edition of the A.M. Best Key Rating Guide. All insurance companies issuing such policies shall be admitted carriers licensed to do business in the state where the Property is located. Any deductible amount under such insurance shall not exceed $5,000. Tenant shall provide to Landlord, upon request, evidence that the insurance required to be carried by Tenant pursuant to this Section, including any endorsement effecting the additional insured status, is in full force and effect and that premiums therefor have been paid.

(d) Updating Coverage. Tenant shall increase the amounts of insurance as required by any Mortgagee, and, not more frequently than once every three (3) years, and not more than one (1) time during the initial Term, as reasonably recommended by Landlord's insurance broker, if, in the opinion of either of them, the amount of insurance then required under this Lease is not adequate. Any limits set forth in this Lease on the amount or type of coverage required by Tenant's insurance shall not limit the liability of Tenant under this Lease.

(e) Certificates of Insurance. Prior to occupancy of the Premises by Tenant, and not less than thirty (30) days prior to expiration of any policy thereafter, Tenant shall furnish to Landlord a certificate of insurance reflecting that the insurance required by this Section is in force, accompanied by an endorsement showing the required additional insureds satisfactory to Landlord in substance and form. Notwithstanding the requirements of this paragraph, Tenant shall at Landlord's request provide to Landlord a certified copy of each insurance policy required to be in force at any time pursuant to the requirements of this Lease or its Exhibits.

11.2 Landlord's Insurance. During the Term Landlord shall maintain in effect insurance on the Building with responsible insurers, on an "all risk" or "special form" basis, insuring the Building and the Tenant Improvements in an amount equal to at least 90% of the replacement cost thereof, excluding land, foundations, footings and underground installations. Landlord shall maintain in full force throughout the Term, commercial general liability insurance providing coverage with limits of not less than Two Million Dollars (S2,000,000.0O) each occurrence for bodily injury and property damage combined covering the Property (the cost of the premiums for which shall be included in Operating Costs). Landlord may, but shall not be obligated to, carry insurance against additional perils and/or in greater amounts.

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11.3 Mutual Waiver of Right of Recovery & Waiver of Subrogation. Landlord and Tenant each hereby waive any right of recovery against each other and the partners, managers, members, shareholders, officers, directors and authorized representatives of each other for any loss or damage that is covered by any policy of property insurance maintained by either party (or required by this Lease to be maintained) with respect to the Premises or the Property or any operation therein, regardless of cause, including negligence (active or passive) of the party benefiting from the waiver. If any such policy of insurance relating to this Lease or to the Premises or the Property does not permit the foregoing waiver or if the coverage under any such policy would be invalidated as a result of such waiver, the party maintaining such policy shall obtain from the insurer under such policy a waiver of all right of recovery by way of subrogation against either party in connection with any claim, loss or damage covered by such policy.

12. DAMAGE OR DESTRUCTION.

12.1 Landlord's Duty to Repair.

(a) If all or a substantial part of the Premises are rendered untenantable or inaccessible by damage to all or any part of the Property from fire or other casualty then, unless either party is entitled to and elects to terminate this Lease pursuant to Sections 12.2- Landlord's Right to Terminate and 12.3 - Tenant's Right to Terminate, Landlord shall, at its expense, use reasonable efforts to repair and restore the Premises and/or the Property, as the case may be, to substantially their former condition to the extent permitted by then applicable Laws; provided, however, that in no event shall Landlord have any obligation for repair or restoration beyond the extent of insurance proceeds received by Landlord for such repair or restoration, or for any of Tenant's personal property, Trade Fixtures or Alterations.

(b) If Landlord is required or elects to repair damage to the Premises and/or the Property, this Lease shall continue in effect, but Tenant's Base Rent and Additional Rent shall be abated with regard to any portion of the Premises that Tenant is prevented from using by reason of such damage or its repair from the date of the casualty until substantial completion of Landlord's repair of the affected portion of the Premises as required under this Lease. In no event shall Landlord be liable to Tenant by reason of any injury to or interference with Tenant's business or property arising from fire or other casualty or by reason of any repairs to any part of the Property necessitated by such casualty.

12.2 Landlord's Right to Terminate. Landlord may elect to terminate this Lease following damage by fire or other casualty under the following circumstances:

(a) If, in the reasonable judgment of Landlord, the Premises and the Property cannot be substantially repaired and restored under applicable Laws within two hundred seventy (270) days from the date of the casualty;

(b) If, in the reasonable judgment of Landlord, adequate proceeds are not, for any reason (other than Landlord's failure to maintain the insurance coverage required to be maintained by Landlord on the Buildings under Section 11.2 of this Lease), made available to Landlord from Landlord's insurance policies (and/or from Landlord's funds made available for such purpose, at Landlord's sole option) to make the required repairs;

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(c) If the Building is damaged or destroyed to the extent that, in the reasonable judgment of Landlord, the cost to repair and restore the Building would exceed twenty-five percent (25%) of the full replacement cost of the Building, whether or not the Premises are at all damaged or destroyed; or

(d) If the fire or other casualty occurs during the last year of the Term.

If any of the circumstances described in subparagraphs (a), (b), (c) or (d) of this Section 12.2 occur or arise, Landlord shall give Tenant notice within one hundred and twenty (120) days after the date of the casualty, specifying whether Landlord elects to terminate this Lease as provided above and, if not, Landlord's estimate of the time required to complete Landlord's repair obligations under this Lease.

12.3 Tenant's Right to Terminate. If all or a substantial part of the Premises are rendered untenantable or inaccessible by damage to all or any part of the Property from fire or other casualty, and Landlord does not elect to terminate as provided above, then Tenant may elect to terminate this Lease if
(a) Landlord's estimate of the time required to complete Landlord's repair obligations under this Lease is greater than two hundred seventy (270) days, in which event Tenant may elect to terminate this Lease by giving Landlord notice of such election to terminate within thirty (30) days after Landlord's notice to Tenant pursuant to Section 12.2 - Landlord's Right to Terminate, or (b) Landlord does not complete Landlord's repair obligations under this Lease within thirty (30) days after Tenant gives Landlord written notice of Tenant's intention to terminate this Lease after Landlord has failed to complete Landlord's repair obligations under this Lease within two hundred seventy (270) days following the date of the fire or other casualty, or (c) the fire or other casualty occurs during the last year of the Term, and would take longer than ninety (90) days to repair, then Tenant may elect to terminate this Lease during the last year of the Term by giving Landlord written notice of such election to terminate within thirty (30) days after it is determined that the repair would take longer than ninety (90) days.

12.4 Waiver. Landlord and Tenant each hereby waive the provisions of California Civil Code Sections 1932(2), 1933(4) and any other applicable existing or future Law permitting the termination of a lease agreement in the event of damage or destruction under any circumstances other than as provided in Sections 12.2 - Landlord's Right to Terminate and 12.3 - Tenant's Right to Terminate.

13. CONDEMNATION.

13.1 Definitions.

(a) "Award" shall mean all compensation, sums, or anything of value awarded, paid or received on a total or partial Condemnation.

(b) "Condemnation" shall mean (i) a permanent taking (or a temporary taking for a period extending beyond the end of the Term) pursuant to the exercise of the power of condemnation or eminent domain by any public or quasi- public authority, private corporation or individual having such power ("Condemnor"), whether by legal proceedings or otherwise, or (ii) a voluntary sale or transfer by Landlord to any such authority, either under threat of condemnation or while legal proceedings for condemnation are pending.

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(c) "Date of Condemnation" shall mean the earlier of the date that title to the property taken is vested in the Condemnor or the date the Condemnor has the right to possession of the property being condemned.

13.2 Effect on Lease.

(a) If more than one-third (1/3) of the Premises is taken by Condemnation, this Lease shall terminate as of the Date of Condemnation. If one- third (1/3) or less of the Premises is taken by Condemnation, this Lease shall remain in effect; provided, however, that if the portion of the Premises remaining after the Condemnation will be unsuitable for Tenant's continued use, then upon notice to Landlord within thirty (30) days after Landlord notifies Tenant of the Condemnation, Tenant may terminate this Lease effective as of the Date of Condemnation.

(b) If twenty-five percent (25%) or more of the Project or of the parcel(s) of land on which the Building is situated or of the Parking Facility or of the floor area in the Building is taken by Condemnation, or if as a result of any Condemnation the Building is no longer reasonably suitable for use as an office building, whether or not any portion of the Premises is taken, Landlord may elect to terminate this Lease, effective as of the Date of Condemnation, by notice to Tenant within thirty (30) days after the Date of Condemnation.

(c) If all or a portion of the Premises is temporarily taken by a Condemnor for a period not extending beyond the end of the Term, this Lease shall remain in full force and effect.

13.3 Restoration. If this Lease is not terminated as provided in Section
13.2 - Effect on Lease, Landlord, at its expense, shall diligently proceed to repair and restore the Premises to substantially its former condition (to the extent permitted by then applicable Laws) and/or repair and restore the Building to an architecturally complete office building; provided, however, that Landlord's obligations to so repair and restore shall be limited to the amount of any Award received by Landlord and not required to be paid to any Mortgagee (as defined in Section 20.2 below). In no event shall Landlord have any obligation to repair or replace any improvements in the Premises beyond the amount of any Award received by Landlord for such repair or to repair or replace any of Tenant's personal property, Trade Fixtures, or Alterations.

13.4 Abatement and Reduction of Rent. If any portion of the Premises is taken in a Condemnation or is rendered permanently untenantable by repairs necessitated by the Condemnation, and this Lease is not terminated, the Base Rent and Additional Rent payable under this Lease shall be proportionally reduced as of the Date of Condemnation based upon the percentage of rentable square feet in the Premises so taken or rendered permanently untenantable. In addition, if this Lease remains in effect following a Condemnation and Landlord proceeds to repair and restore the Premises, the Base Rent and Additional Rent payable under this Lease shall be abated during the period of such repair or restoration to the extent such repairs prevent Tenant's use of the Premises.

13.5 Awards. Any Award made shall be paid to Landlord, and Tenant hereby assigns to Landlord, and waives all interest in or claim to, any such Award, including any claim for the value of the unexpired Term; provided, however, that Tenant shall be entitled to receive, or to prosecute a separate claim for, an Award for a temporary taking of the Premises or a portion thereof by a

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Condemnor where this Lease is not terminated (to the extent such Award relates to the unexpired Term), or an Award or portion thereof separately designated for relocation expenses or moving costs or the interruption of or damage to Tenant's business or as compensation for Tenant's personal property, Trade Fixtures or Alterations, and for loss of goodwill, so long as any recovery for loss of goodwill does not affect Landlord's recovery for any such taking.

13.6 Waiver. Landlord and Tenant each hereby waive the provisions of California Code of Civil Procedure Section 1265.130 and any other applicable existing or future Law allowing either party to petition for a termination of this Lease upon a partial taking of the Premises and/or the Property.

14. ASSIGNMENT AND SUBLETTING.

14.1 Landlord's Consent Required. Tenant shall not assign this Lease or any interest therein, or sublet or license or permit the use or occupancy of the Premises or any part thereof by or for the benefit of anyone other than Tenant, or in any other manner transfer all or any part of Tenant's interest under this Lease (each and all a "Transfer"), without the prior written consent of Landlord, which Consent (subject to the other provisions of this Section 14) shall not be unreasonably withheld. If Tenant is a business entity, any direct or indirect transfer of fifty percent (50%) or more of the ownership interest of the entity (whether in a single transaction or in the aggregate through more than one transaction) shall be deemed a Transfer. Notwithstanding any provision in this Lease to the contrary, Tenant shall not mortgage, pledge, hypothecate or otherwise encumber this Lease or all or any part of Tenant's interest under this Lease.

14.2 Reasonable Consent.

(a) Prior to any proposed Transfer, Tenant shall submit in writing to Landlord (i) the name and legal composition of the proposed assignee, subtenant, user or other transferee (each a "Proposed Transferee"); (ii) the nature of the business proposed to be carried on in the Premises; (iii) a current balance sheet, income statements for the last two years and such other reasonable financial and other information concerning the Proposed Transferee as Landlord may request; and (iv) a copy of the proposed assignment, sublease or other agreement governing the proposed Transfer. Within fifteen (15) Business Days after Landlord receives all such information it shall notify Tenant whether it approves or disapproves such Transfer or if it elects to proceed under Section
14.7 - Landlord's Right to Space.

(b) Tenant acknowledges and agrees that, among other circumstances for which Landlord could reasonably withhold consent to a proposed Transfer, it shall be reasonable for Landlord to withhold consent where (i) the Proposed Transferee does not intend itself to occupy the entire portion of the Premises assigned or sublet, (ii) Landlord reasonably disapproves of the Proposed Transferee's business operating ability or history, reputation or creditworthiness or the nature or character of the business to be conducted by the Proposed Transferee at the Premises, (iii) the Proposed Transferee is a governmental agency or unit or an existing tenant in the Project, unless, in the case of an existing tenant, Landlord does not have space in the Project available to lease to the existing tenant containing the same or more square feet than the existing tenant identifies in writing that the existing tenant requires, (iv) the proposed Transfer would violate any "exclusive" rights of any tenants in the Project, (v) Landlord or Landlord's agent has shown space in the Project to the Proposed Transferee or given a written proposal in response to any inquiries

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from the Proposed Transferee or the Proposed Transferee's agent concerning availability of space in the Project, at any time within the preceding six months, or (vi) Landlord otherwise determines that the proposed Transfer would have the effect of decreasing the value of the Project or increasing the expenses associated with operating, maintaining and repairing the Project. In no event may Tenant publicly advertise all or any portion of the Premises for assignment or sublease at a rental less than that then sought by Landlord for a direct lease (non-sublease) of comparable space in the Project.

14.3 Excess Consideration. If Landlord consents to the Transfer, Landlord shall be entitled to receive as Additional Rent hereunder, fifty percent (50%) of all "Sublease Profits" (as defined below). The term "Sublease Profits" shall mean any consideration paid by the Transferee for the assignment and, in the case of a sublease, the excess of the rent and other consideration payable by the subtenant over the amount of Base Rent and Additional Rent payable hereunder applicable to the subleased space, less any and all direct, out-of-pocket expenses and cash concessions, including costs for necessary Alterations, attorneys' fees (not to exceed One Thousand Dollars [$1,000.00] in attorneys' fees) and brokerage commissions, paid by Tenant to procure the assignee or subtenant. Tenant shall pay to Landlord as additional rent, within twenty (20) days after receipt by Tenant, any such excess consideration paid by any transferee (the "Transferee") for the Transfer, provided any capital expenditures and brokerage commissions in connection with any sublease shall be amortized over the term of the sublease.

14.4 No Release Of Tenant. No consent by Landlord to any Transfer shall relieve Tenant of any obligation to be performed by Tenant under this Lease, whether occurring before or after such consent, assignment, subletting or other Transfer. Each Transferee shall be jointly and severally liable with Tenant (and Tenant shall be jointly and severally liable with each Transferee) for the payment of rent (or, in the case of a sublease, rent in the amount set forth in the sublease) and for the performance of all other terms and provisions of this Lease. The consent by Landlord to any Transfer shall not relieve Tenant or any such Transferee from the obligation to obtain Landlord's express prior written consent to any subsequent Transfer by Tenant or any Transferee. The acceptance of rent by Landlord from any other person (whether or not such person is an occupant of the Premises) shall not be deemed to be a waiver by Landlord of any provision of this Lease or to be a consent to any Transfer.

14.5 Expenses and Attorneys' Fees. Tenant shall pay to Landlord on demand all costs and expenses (including reasonable attorneys' fees, not to exceed One Thousand Dollars [$1,000.00] in attorneys' fees per request) incurred by Landlord in connection with reviewing or consenting to any proposed Transfer (including any request for consent to, or any waiver of Landlord's rights in connection with, any security interest in any of Tenant's property at the Premises).

14.6 Effectiveness of Transfer. Prior to the date on which any permitted Transfer (whether or not requiring Landlord's consent) becomes effective, Tenant shall deliver to Landlord a counterpart of the fully executed Transfer document and Landlord's standard form of Consent to Assignment or Consent to Sublease executed by Tenant and the Transferee in which each of Tenant and the Transferee confirms its obligations pursuant to this Lease. Failure or refusal of a Transferee to execute any such instrument shall not release or discharge the Transferee from liability as provided herein. The voluntary, involuntary or other surrender of this Lease by Tenant, or a mutual cancellation by Landlord and Tenant, shall not work a merger, and any such surrender or

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cancellation shall, at the option of Landlord, either terminate all or any existing subleases or operate as an assignment to Landlord of any or all of such subleases.

14.7 Landlord's Right to Space. Notwithstanding any of the above provisions of this Section to the contrary, if Tenant notifies Landlord that it desires to enter into a Transfer, Landlord, in lieu of consenting to such Transfer, may elect (x) in the case of an assignment or a sublease of the entire Premises, to terminate this Lease, or (y) in the case of a sublease of less than the entire Premises, to terminate this Lease as it relates to the space proposed to be subleased by Tenant. In such event, this Lease will terminate (or the space proposed to be subleased will be removed from the Premises subject to this Lease and the Base Rent and Tenant's Share under this Lease shall be proportionately reduced) on the date the Transfer was proposed to be effective, and Landlord may lease such space to any party, including the prospective Transferee identified by Tenant. Notwithstanding the provisions of this Section 14.7 to the contrary, if (i) Tenant proposes to sublease a portion of the Premises, and (ii) Landlord elects to terminate this Lease with respect to the space Tenant proposes to sublease, then Tenant shall have the right to rescind (a "Rescission") any such termination by Landlord only with respect to any sublease which cumulatively, whether through one (1) or more subleases, does not result in Tenant subleasing, in the aggregate, more than seventy-five percent (75%) of the rentable area in the Premises. Any Rescission shall be effective, if at all, only by Tenant giving Landlord written notice ("Tenant's Rescission Notice") within five (5) Business Days following Landlord's written notice of termination pursuant to the provisions of this Section 14.7. Upon Tenant giving Tenant's Rescission Notice,
(iii) this Lease shall remain in full force and effect in accordance with the provisions contained herein, and (iv) Tenant shall be deemed to have withdrawn the request for consent to a sublease, and the proposed sublease which was the basis for Landlord's termination under the provisions of this Section 14.7 shall be void, and of no force and effect. Tenant shall not have the right to rescind Landlord's termination of a sublease which cumulatively would result in Tenant subleasing more than seventy-five percent (75%) of the rentable area in the Premises.

14.8 Assignment of Sublease Rents. Tenant hereby absolutely and irrevocably assigns to Landlord any and all rights to receive rent and other consideration from any sublease and agrees that Landlord, as assignee or as attorney-in-fact for Tenant solely for the purpose of collecting rent or other consideration payable to Tenant under any sublease, or a receiver for Tenant appointed on Landlord's application may (but shall not be obligated to) collect such rents and other consideration and apply the same toward Tenant's obligations to Landlord under this Lease; provided, however, that Landlord grants to Tenant at all times prior to occurrence of any breach or default by Tenant a revocable license to collect such rents (which license shall automatically and without notice be and be deemed to have been revoked and terminated immediately upon any Event of Default).

14.9 Transfer to Affiliate. Notwithstanding any provision contained in the Section 14 to the contrary, Tenant shall have the right, without the consent of Landlord, upon ten (10) days prior written notice to Landlord, to transfer Tenant's interest in this Lease to either (i) a successor corporation related to Tenant by merger, consolidation, or non-bankruptcy reorganization, (ii) a purchaser of at least ninety percent (90%) of Tenant's assets as an ongoing concern, or (iii) an "Affiliate" of Tenant, and the provisions of Sections 14.2, 14.3 and 14.7 shall not apply with respect to the transfer to the Affiliate, but any transfer pursuant to the provisions of this Section 14.9 shall be subject to all other terms and conditions of this Lease, including the provisions of this
Section 14.9. Tenant shall remain liable under this Lease after any such transfer. For the purposes of this Article 14, the term "Affiliate" of Tenant shall mean and refer to any entity controlling,

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controlled by or under common control with Tenant or Tenant's parent, as the case may be. "Control" as used herein shall mean the possession, direct or indirect, of the power to direct or cause the direction of the management and policies of such controlled entity; and the ownership, or possession of the right to vote, in the ordinary direction of its affairs, of at least fifty percent (5O%) of the voting interest in any entity. Notwithstanding Tenant's right to Transfer to an Affiliate pursuant to the provisions of this Section 14.9, Tenant may not, through use of its rights under this Article 14 in two or more transactions (whether separate transactions or steps or phases of a single transaction), at one time or over time, whether by first assigning this Lease to a subsidiary and then merging the subsidiary into another entity or selling the stock of the subsidiary or by other means, assign or sublease the Premises, or transfer control of Tenant, to any person or entity which is not a subsidiary, affiliate or controlling corporation of the original Tenant, as then constituted, existing prior to the commencement of such transactions, without first obtaining Landlord's prior written consent pursuant to the provisions of
Section 14.2. For purposes of this Lease, a sale of Tenant's capital stock through any public exchange shall not be deemed an assignment, subletting or other transfer of this Lease or the Premises requiring Landlord's consent.

15. DEFAULT AND REMEDIES.

15.1 Events of Default. The occurrence of any of the following shall constitute an "Event of Default" by Tenant:

(a) Tenant fails to make any payment of rent when due, or any amount required to replenish the security deposit as provided in Section 4 above, if payment in full is not received by Landlord within three (3) Business Days after written notice that it is due.

(b) Tenant abandons the Premises and fails to pay rent when due.

(c) Tenant fails timely to deliver any subordination document, estoppel certificate or financial statement requested by Landlord within the applicable time period specified in Sections 20 - Encumbrances - and 21 - Estoppel Certificates and Financial Statements - below.

(d) Tenant violates the restrictions on Transfer set forth in Section
14 - Assignment and Subletting.

(e) Tenant ceases doing business as a going concern; makes an assignment for the benefit of creditors; is adjudicated an insolvent, files a petition (or files an answer admitting the material allegations of a petition) seeking relief under any under any state or federal bankruptcy or other statute, law or regulation affecting creditors' rights; all or substantially all of Tenant's assets are subject to judicial seizure or attachment and are not released within 60 days, or Tenant consents to or acquiesces in the appointment of a trustee, receiver or liquidator for Tenant or for all or any substantial part of Tenant's assets.

(f) Tenant fails, within ninety (90) days after the commencement of any proceedings against Tenant seeking relief under any state or federal bankruptcy or other statute, law or regulation affecting creditors' rights, to have such proceedings dismissed, or Tenant fails, within ninety (90) days after an appointment, without Tenant's consent or acquiescence, of any trustee,

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receiver or liquidator for Tenant or for all or any substantial part of Tenant's assets, to have such appointment vacated.

(g) Tenant fails to perform or comply with any provision of this Lease other than those described in (a) through (f) above, and does not fully cure such failure within thirty (30) days after notice to Tenant or, if such failure cannot be cured within such thirty (30)-day period, Tenant fails within such thirty (30)-day period to commence, and thereafter diligently proceed with, all actions necessary to cure such failure as soon as reasonably possible but in all events within one hundred twenty (120) days of such notice; provided, however, that if Landlord in Landlord's reasonable judgment determines that such failure cannot or will not be cured by Tenant within such one hundred twenty
(120) days, then such failure shall constitute an Event of Default immediately upon such notice to Tenant.

15.2 Remedies. Upon the occurrence of an Event of Default, Landlord shall have the following remedies, which shall not be exclusive but shall be cumulative and shall be in addition to any other remedies now or hereafter allowed by law:

(a) Landlord may terminate Tenant's right to possession of the Premises at any time by written notice to Tenant. Tenant expressly acknowledges that in the absence of such written notice from Landlord, no other act of Landlord, including re-entry into the Premises, efforts to relet the Premises, reletting of the Premises for Tenant's account, storage of Tenant's personal property and Trade Fixtures, acceptance of keys to the Premises from Tenant or exercise of any other rights and remedies under this Section, shall constitute an acceptance of Tenant's surrender of the Premises or constitute a termination of this Lease or of Tenant's right to possession of the Premises. Upon such termination in writing of Tenant's right to possession of the Premises, as herein provided, this Lease shall terminate and Landlord shall be entitled to recover damages from Tenant as provided in California Civil Code Section 1951.2 and any other applicable existing or future Law providing for recovery of damages for such breach, including the worth at the time of award of the amount by which the rent which would be payable by Tenant hereunder for the remainder of the Term after the date of the award of damages, including Additional Rent as reasonably estimated by Landlord, exceeds the amount of such rental loss as Tenant proves could have been reasonably avoided, discounted at the discount rate published by the Federal Reserve Bank of San Francisco for member banks at the time of the award plus one percent (1%).

(b) Landlord shall have the remedy described in California Civil Code
Section 1951.4 (Landlord may continue this Lease in effect after Tenant's breach and abandonment and recover rent as it becomes due, if Tenant has the right to sublet or assign, subject only to reasonable limitations).

(c) Landlord may cure the Event of Default at Tenant's expense. If Landlord pays any sum or incurs any expense in curing the Event of Default, Tenant shall reimburse Landlord upon demand for the amount of such payment or expense with interest at the Interest Rate from the date the sum is paid or the expense is incurred until Landlord is reimbursed by Tenant.

(d) Landlord may remove all Tenant's property from the Premises, and such property may be stored by Landlord in a public warehouse or elsewhere at the sole cost and for the account of Tenant. If Landlord does not elect to store any or all of Tenant's property left in the Premises, Landlord may consider such property to be abandoned by Tenant, and Landlord may

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thereupon dispose of such property in any manner deemed appropriate by Landlord. Any proceeds realized by Landlord on the disposal of any such property shall be applied first to offset all expenses of storage and sale, then credited against Tenant's outstanding obligations to Landlord under this Lease, and any balance remaining after satisfaction of all obligations of Tenant under this Lease shall be delivered to Tenant.

16. LATE CHARGE AND INTEREST.

16.1 Late Charge. If any payment of rent is not received by Landlord within five (5) days after written notice from Landlord to Tenant that the payment is past due, Tenant shall pay to Landlord on demand as a late charge an additional amount equal to four percent (4%) of the overdue payment; provided, however, if Landlord has given Tenant written notice one (1) or more times in any consecutive twelve (12) month period that a payment of rent is past due, then Tenant shall pay to Landlord on demand commencing with the second (2nd) past due payment in any twelve (12) month period, and continuing with each past due payment thereafter in such twelve (12) month period, as a late charge an additional amount equal to four percent (4%) of the overdue payment without any requirement of additional notice that such payment is past due. A late charge shall not be imposed more than once on any particular installment not paid when due, but imposition of a late charge on any payment not made when due does not eliminate or supersede late charges imposed on other (prior) payments not made when due or preclude imposition of a late charge on other installments or payments not made when due.

16.2 Interest. In addition to the late charges referred to above, which are intended to defray Landlord's costs resulting from late payments, any payment from Tenant to Landlord not paid when due shall at Landlord's option bear interest from the date due until paid to Landlord by Tenant at the rate of fifteen percent (15%) per annum or the maximum lawful rate that Landlord may charge to Tenant under applicable laws, whichever is less (the "Interest Rate"). Acceptance of any late charge and/or interest shall not constitute a waiver of Tenant's default with respect to the overdue sum or prevent Landlord from exercising any of its other rights and remedies under this Lease.

17. WAIVER. No provisions of this Lease shall be deemed waived by either party unless such waiver is in a writing signed by the waiving party. The waiver by either party of any breach of any provision of this Lease shall not be deemed a waiver of such provision or of any subsequent breach of the same or any other provision of this Lease. No delay or omission in the exercise of any right or remedy of either party upon any default by the other party shall impair such right or remedy or be construed as a waiver. Landlord's acceptance of any payments of rent due under this Lease shall not be deemed a waiver of any default by Tenant under this Lease (including Tenant's recurrent failure to timely pay rent) other than Tenant's nonpayment of the accepted sums, and no endorsement or statement on any check or on any letter accompanying any check or payment shall be deemed an accord and satisfaction. The consent to or approval by either party of any act by the other party requiring the first party's consent or approval shall not be deemed to waive or render unnecessary the consenting or approving party's consent to or approval of any subsequent act by the other party.

18. ENTRY, INSPECTION AND CLOSURE. Upon reasonable oral or written notice to Tenant (and without notice in emergencies), Landlord and its authorized representatives may enter the Premises at all reasonable times to: (a) determine whether the Premises are in good condition,

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(b) determine whether Tenant is complying with its obligations under this Lease,
(c) perform any maintenance or repair of the Premises or the Building that Landlord has the right or obligation to perform, (d) install or repair improvements for other tenants where access to the Premises is required for such installation or repair, (e) serve, post or keep posted any notices required or allowed under the provisions of this Lease, (f) show the Premises to prospective brokers, agents, buyers, transferees, or Mortgagees, or (g) do any other act or thing necessary for the safety or preservation of the Premises or the Building. In addition, upon prior oral or written notice to Tenant, Landlord shall have the right during the last nine (9) months of the Term, to show the Premises to prospective tenants; provided, however, in each instance where Landlord cannot provide Tenant with the name of the prospective tenant, then such prospective tenant shall not be permitted to see Tenant's research and development room within the Premises until twenty-four (24) hours after Landlord initially shows the Premises to the prospective tenant. Notwithstanding anything contained to the contrary in this Section 18, Tenant shall have the right to escort any prospective brokers, agents, buyers, transferees, Mortgagees or prospective tenants through the Premises, and to require such persons to comply with Tenant's reasonable security precautions. When reasonably necessary Landlord may temporarily close entrances, doors, corridors, or other facilities in the Building without liability to Tenant by reason of such closure. Landlord shall conduct its activities under this Section in a manner that will minimize inconvenience to Tenant without incurring additional expense to Landlord. In no event shall Tenant be entitled to an abatement of rent on account of any entry by Landlord, and Landlord shall not be liable in any manner for any inconvenience, loss of business or other damage to Tenant or other persons arising out of Landlord's entry on the Premises in accordance with this Section. No action by Landlord pursuant to this paragraph shall constitute an eviction of Tenant, constructive or otherwise, entitle Tenant to an abatement of rent or to terminate this Lease or otherwise release Tenant from any of Tenant's obligations under this Lease.

19. SURRENDER AND HOLDING OVER.

19.1 Surrender. Upon the expiration or termination of this Lease, Tenant shall surrender the Premises and all Tenant Improvements and Alterations to Landlord broom-clean and in their original condition, except for reasonable wear and tear, damage from casualty or condemnation and any changes resulting from approved Alterations; provided, however, that not later than the expiration or termination of this Lease Tenant shall remove all telephone and other cabling installed in the Building by Tenant and remove from the Premises all Tenant's personal property and any Trade Fixtures and all Alterations that Landlord has elected to require Tenant to remove as provided in Section 6.1 - Tenant Improvements & A1terations, and repair any damage caused by such removal provided, however, upon expiration or termination of this Lease Tenant shall not be obligated to remove any Hazardous Material from the Property unless Handled by Tenant at the Property. In no event shall Tenant be required to remove Tenant Improvements, except those Tenant Improvements, if any, identified by Landlord when Landlord approves the Construction Documents (as defined in Exhibit B attached hereto). If such removal is not completed upon the expiration or termination of the Term, Landlord shall have the right (but no obligation) to remove the same, and Tenant shall pay Landlord on demand for all costs of removal and storage thereof and for the rental value of the Premises for the period from the end of the Term through the end of the time reasonably required for such removal. Landlord shall also have the right to retain or dispose of all or any portion of such property if Tenant does not pay all such costs and retrieve the property within ten (10) days after notice from Landlord (in which event title to all such property described in Landlord's notice shall be transferred to and vest in Landlord). Tenant waives all Claims against

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Landlord for any damage or loss to Tenant resulting from Landlord's removal, storage, retention, or disposition of any such property. Upon expiration or termination of this Lease or of Tenant's possession, whichever is earliest, Tenant shall surrender all keys to the Premises or any other part of the Building and shall deliver to Landlord all keys for or make known to Landlord the combination of locks on all safes, cabinets and vaults that may be located in the Premises. Tenant's obligations under this Section shall survive the expiration or termination of this Lease.

19.2 Holding Over. If Tenant (directly or through any Transferee or other successor-in-interest of Tenant) remains in possession of the Premises after the expiration or termination of this Lease, Tenant's continued possession shall be on the basis of a tenancy at the sufferance of Landlord. No act or omission by Landlord, other than its specific written consent, shall constitute permission for Tenant to continue in possession of the Premises, and if such consent is given or declared to have been given by a court judgment, Landlord may terminate Tenant's holdover tenancy at any time upon seven (7) days written notice. In such event, Tenant shall continue to comply with or perform all the terms and obligations of Tenant under this Lease, except that the monthly Base Rent during Tenant's holding over shall be twice the Base Rent payable in the last full month prior to the termination hereof. Acceptance by Landlord of rent after such termination shall not constitute a renewal or extension of this Lease; and nothing contained in this provision shall be deemed to waive Landlord's right of re-entry or any other right hereunder or at law. Tenant shall indemnify, defend and hold Landlord harmless from and against all Claims arising or resulting directly or indirectly from Tenant's failure to timely surrender the Premises, including (i) any rent payable by or any loss, cost, or damages claimed by any prospective tenant of the Premises, and (ii) Landlord's damages as a result of such prospective tenant rescinding or refusing to enter into the prospective lease of the Premises by reason of such failure to timely surrender the Premises.

20. ENCUMBRANCES.

20.1 Subordination. This Lease is expressly made subject and subordinate to any mortgage, deed of trust, ground lease, underlying lease or like encumbrance affecting any part of the Property or any interest of Landlord therein which is now existing or hereafter executed or recorded ("Encumbrance"); provided, however, that such subordination shall only be effective, as to future Encumbrances, if the holder of the Encumbrance agrees that this Lease shall survive the termination of the Encumbrance by lapse of time, foreclosure or otherwise so long as Tenant is not in default beyond any applicable cure periods under this Lease. Provided the conditions of the preceding sentence are satisfied, Tenant shall execute and deliver to Landlord, within ten (10) Business Days after written request therefor by Landlord and in a form reasonably requested by Landlord, any additional documents evidencing the subordination of this Lease with respect to any such Encumbrance and the nondisturbance agreement of the holder of any such Encumbrance. If the interest of Landlord in the, Property is transferred pursuant to or in lieu of proceedings for enforcement of any Encumbrance, Tenant shall immediately and automatically attorn to the new owner, and this Lease shall continue in full force and effect as a direct lease between the transferee and Tenant on the terms and conditions set forth in this Lease. Landlord agrees to use reasonable good faith efforts to obtain within 60 days after execution of this Lease, a Subordination, Attornment and Non-Disturbance Agreement (the "SNDA") from the holder of any Encumbrance existing at the date of this Lease pursuant to the provisions contained above; provided, Landlord's failure to obtain an SNDA shall not affect the validity of this Lease. Tenant shall be responsible for all costs and fees charged by any holder of an Encumbrance to prepare or negotiate an SNDA.

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20.2 Mortgagee Protection. Tenant agrees to give any holder of any Encumbrance covering any part of the Property ("Mortgagee"), by registered mail, a copy of any notice of default served upon Landlord, provided that prior to such notice Tenant has been notified in writing (by way of notice of assignment of rents and leases, or otherwise) of the address of such Mortgagee. If Landlord shall have failed to cure such default within thirty (30) days from the effective date of such notice of default, then the Mortgagee shall have an additional thirty (30) days within which to cure such default or if such default cannot be cured within that time, then such additional time as may be necessary to cure such default (including the time necessary to foreclose or otherwise terminate its Encumbrance, if necessary to effect such cure), and this Lease shall not be terminated so long as such remedies are being diligently pursued.

21. ESTOPPEL CERTIFICATES AND FINANCIAL STATEMENTS.

21.1 Estoppel Certificates. Within ten (10) Business Days after written request therefor, Tenant shall execute and deliver to Landlord, in a form provided by or satisfactory to Landlord, a certificate stating that this Lease is in full force and effect, describing any amendments or modifications hereto, acknowledging that this Lease is subordinate or prior, as the case may be, to any Encumbrance and stating any other information Landlord may reasonably request, including the Term, the monthly Base Rent, the date to which Rent has been paid, the amount of any security deposit or prepaid rent, whether either party hereto is in default under the terms of the Lease, and whether Landlord has completed its construction obligations hereunder (if any). If Tenant fails timely to execute and deliver such certificate as provided above, then Landlord and the addressee of such certificate shall be entitled to rely upon the information contained in the certificate submitted to Tenant as true, correct and complete, and Tenant shall be estopped from later denying, contradicting or taking any position inconsistent with the information contained in such certificate. Any person or entity purchasing, acquiring an interest in or extending financing with respect to the Property shall be entitled to rely upon any such certificate. If Tenant fails to deliver such certificate within ten
(10) Business Days after Landlord's second written request therefor, Tenant shall be liable to Landlord for any damages incurred by Landlord including any profits or other benefits from any financing of the Property or any interest therein which are lost or made unavailable as a result, directly or indirectly, of Tenant's failure or refusal to timely execute or deliver such estoppel certificate.

21.2 Financial Statements. Within ten (10) Business Days after written request therefor, but not more than once a year, Tenant shall deliver to Landlord a copy of the financial statements (including at least a year end balance sheet and a statement of profit and loss) of Tenant (and of each guarantor of Tenant's obligations under this Lease) for each of the three most recently completed years, prepared in accordance with generally accepted accounting principles (and, if such is Tenant's normal practice, audited by an independent certified public accountant), all then available subsequent interim statements, and such other financial information as may reasonably be requested by Landlord or required by any Mortgagee. Landlord shall not disclose details of such financial statements except (x) pursuant to court proceedings, and (y) to Landlord's (a) directors, (b) shareholders, (c) officers, (d) those employees of Landlord and of Landlord's agents who have a need to know, (e) accountants, (f) auditors, (g) lenders and/or Mortgagee, (h) purchasers, (i) potential lenders and/or Mortgagees and purchasers, and (j) attorneys. Landlord shall use all reasonable efforts to prevent such persons or employees of such entities from disclosing details of Tenant's financial statements.

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22. NOTICES. Any notice, demand, request, consent or approval that either party desires or is required to give to the other party under this Lease shall be in writing and shall be served personally, delivered by messenger or courier service, or sent by U.S. certified mail, return receipt requested, postage prepaid, addressed to the other party at the party's address for notices set forth in the Basic Lease Information. Any notice required pursuant to any Laws may be incorporated into, given concurrently with or given separately from any notice required under this Lease. Notices shall be deemed to have been given and be effective on the earlier of (a) receipt (or refusal of delivery or receipt); or (b) one (1) day after acceptance by the independent service for delivery, if sent by independent messenger or courier service, or three (3) days after mailing if sent by mail in accordance with this Section. Either party may change its address for notices hereunder, effective fifteen (15) days after notice to the other party complying with this Section. If Tenant sublets the Premises, notices from Landlord shall be effective on the subtenant when given to Tenant pursuant to this Section.

23. ATTORNEYS' FEES. In the event of any dispute between Landlord and Tenant in any way related to this Lease, the non-prevailing party shall pay to the prevailing party all reasonable attorneys' fees and costs and expenses of any type incurred by the prevailing party in connection with any action or proceeding (including any appeal and the enforcement of any judgment or award), whether or not the dispute is litigated or prosecuted to final judgment. The "prevailing party" shall be determined based upon an assessment of which party's major arguments or positions taken in the action or proceeding could fairly be said to have prevailed (whether by compromise, settlement, abandonment by the other party of its claim or defense, final decision, after any appeals, or otherwise) over the other party's major arguments or positions on major disputed issues.

24. QUIET POSSESSION. Subject to Tenant's full and timely performance of all of Tenant's obligations under this Lease and subject to the terms of this Lease, including Section 20 - Encumbrances, Tenant shall have the quiet possession of the Premises throughout the Term as against any persons or entities lawfully claiming by, through or under Landlord.

25. SECURITY MEASURES. Tenant shall be responsible for all security measures for the Premises, such as the registration or search of all persons entering or leaving the Building, requiring identification for access to the Building, evacuation of the Building for cause, suspected cause, or for drill purposes, the issuance of magnetic pass cards, if applicable, or keys for Building to prevent any threat of property loss or damage, bodily injury or business interruption. Landlord shall have no security responsibility for the Premises or the Project. Landlord, its agents and employees shall have no liability to Tenant or its Representatives or Visitors for the implementation or exercise of, or the failure to implement or exercise, any security measures for the Premises or the Project, or for any resulting disturbance of Tenant's use or enjoyment of the Premises.

26. FORCE MAJEURE. If either Landlord or Tenant is delayed, interrupted or prevented from performing any of its obligations under this Lease (other than, with respect to Tenant the payment of Base Rent, Additional Rent or any other charge payable by Tenant to Landlord under this Lease), including Landlord's obligations under the Construction Rider and such delay, interruption or prevention is due to fire, act of God, governmental act or failure to act, labor dispute, unavailability of materials or any cause outside the reasonable control of Landlord or Tenant, then the time for performance of the affected obligations of Landlord or Tenant, as the case may be,

-33-

shall be extended for a period equivalent to the period of such delay, interruption or prevention. The inability to pay money shall in no event constitute force majeure.

27. RULES AND REGULATIONS. Tenant shall be bound by and shall comply with the rules and regulations attached to and made a part of this Lease as Exhibit C to the extent those rules and regulations are not in conflict with the terms of this Lease, as well as any reasonable rules and regulations hereafter adopted by Landlord for all tenants of the Building, upon notice to Tenant thereof (collectively, the "Building Rules"). Landlord shall not be responsible to Tenant or to any other person for any violation of, or failure to observe, the Building Rules by any other tenant or other person.

28. LANDLORD'S LIABILITY. The term "Landlord," as used in this Lease, shall mean only the owner or owners of the Building at the time in question. In the event of any conveyance of title to the Building, then from and after the date of such conveyance, upon such transferee's written recognition of this Lease, the transferor Landlord shall be relieved of all liability with respect to Landlord's obligations to be performed under this Lease after the date of such conveyance. Notwithstanding any other term or provision of this Lease, the liability of Landlord for its obligations under this Lease is limited solely to Landlord's interest in the Building as the same may from time to time be encumbered, and no personal liability shall at any time be asserted or enforceable against any other assets of Landlord or against Landlord's partners or members or its or their respective partners, shareholders, members, directors, officers or managers on account of any of Landlord's obligations or actions under this Lease.

29. CONSENTS AND APPROVALS.

29.1 Determination in Good Faith. Wherever the consent, approval, judgment or determination of Landlord is required or permitted under this Lease, Landlord may exercise its good faith business judgment in granting or withholding such consent or approval or in making such judgment or determination without reference to any extrinsic standard of reasonableness, unless the specific provision contained in this Lease providing for such consent, approval, judgment or determination specifies that Landlord's consent or approval is not to be unreasonably withheld, or that such judgment or determination is to be reasonable, or otherwise specifies the standards under which Landlord may withhold its consent. If it is determined that Landlord failed to give its consent where it was required to do so under this Lease, Tenant shall be entitled to injunctive relief but shall not to be entitled to monetary damages or to terminate this Lease for such failure.

29.2 No Liability Imposed on Landlord. The review and/or approval by Landlord of any item or matter to be reviewed or approved by Landlord under the terms of this Lease or any Exhibits or Addenda hereto shall not impose upon Landlord any liability for the accuracy or sufficiency of any such item or matter or the quality or suitability of such item for its intended use. Any such review or approval is for the sole purpose of protecting Landlord's interest in the Property, and no third parties, including Tenant or the Representatives and Visitors of Tenant or any person or entity claiming by, through or under Tenant, shall have any rights as a consequence thereof.

30. BROKERS. Landlord shall pay the fee or commission of the broker or brokers identified in the Basic Lease Information (the "Broker") in accordance with Landlord's separate written agreement with the Broker, if any. Tenant warrants and represents to Landlord that in the

-34-

negotiating or making of this Lease neither Tenant nor anyone acting on Tenant's behalf has dealt with any broker or finder who might be entitled to a fee or commission for this Lease other than the Broker. Tenant shall indemnify and hold Landlord harmless from any claim or claims, including costs, expenses and attorney's fees incurred by Landlord asserted by any other broker or finder for a fee or commission based upon any dealings with or statements made by Tenant or Tenant's Representatives. Landlord agrees to indemnify and hold Tenant harmless from and against any claim or claims, including costs, expenses and attorney's fees incurred by Tenant, by third parties claiming by, through, or under Landlord for commissions due or alleged to be due in connection with this Lease.

31. RELOCATION OF PREMISES [Intentionally deleted].

32. WAIVER OF RIGHT TO JURY TRIAL. Landlord and Tenant waive their respective rights to trial by jury of any contract or tort claim, counterclaim, cross- complaint, or cause of action in any action, proceeding, or hearing brought by either party against the other on any matter arising out of or in any way connected with this Lease, the relationship of Landlord and Tenant, or Tenant's use or occupancy of the Premises, including any claim of injury or damage or the enforcement of any remedy under any current or future law, statute, regulation, code, or ordinance.

33. ENTIRE AGREEMENT. This Lease, including the Exhibits and any Addenda attached hereto, and the documents referred to herein, if any, constitute the entire agreement between Landlord and Tenant with respect to the leasing of space by Tenant in the Building, and supersede all prior or contemporaneous agreements, understandings, proposals and other representations by or between Landlord and Tenant, whether written or oral, all of which are merged herein. Neither Landlord nor Landlord's agents have made any representations or warranties with respect to the Premises, the Building, the Project or this Lease except as expressly set forth herein, and no rights, easements or licenses shall be acquired by Tenant by implication or otherwise unless expressly set forth herein. The submission of this Lease for examination does not constitute an option for the Premises and this Lease shall become effective as a binding agreement only upon execution and delivery thereof by Landlord to Tenant.

34. MISCELLANEOUS. This Lease may not be amended or modified except by a writing signed by Landlord and Tenant. Subject to Section 14 - Assignment and Subletting and Section 28 - Landlord's Liability, this Lease shall be binding on and shall inure to the benefit of the parties and their respective successors, assigns and legal representatives. The determination that any provisions hereof may be void, invalid, illegal or unenforceable shall not impair any other provisions hereof and all such other provisions of this Lease shall remain in full force and effect. The unenforceability, invalidity or illegality of any provision of this Lease under particular circumstances shall not render unenforceable, invalid or illegal other provisions of this Lease, or the same provisions under other circumstances. This Lease shall be construed and interpreted in accordance with the laws (excluding conflict of laws principles) of the State in which the Building is located. The provisions of this Lease shall be construed in accordance with the fair meaning of the language used and shall not be strictly construed against either party, even if such party drafted the provision in question. When required by the context of this Lease, the singular includes the plural. Wherever the term "including" is used in this Lease, it shall be interpreted as meaning "including, but not limited to" the matter or matters thereafter enumerated. The captions contained in this Lease are for purposes of convenience only and are not to be used to interpret or construe this Lease. If more than one person or entity is identified as Tenant hereunder, the obligations of

-35-

each and all of them under this Lease shall be joint and several. Time is of the essence with respect to this Lease. Neither Landlord nor Tenant shall record this Lease.

35. AUTHORITY. If Tenant is a corporation, partnership, limited liability company or other form of business entity, each of the persons executing this Lease on behalf of Tenant warrants and represents that Tenant is a duly organized and validly existing entity, that Tenant has full right and authority to enter into this Lease and that the persons signing on behalf of Tenant are authorized to do so and have the power to bind Tenant to this Lease. Tenant shall provide Landlord upon request with evidence reasonably satisfactory to Landlord confirming the foregoing representations.

IN WITNESS WHEREOF, Landlord and Tenant have entered into this Lease as of the date first above written.

TENANT:                                  LANDLORD:

NATUS MEDICAL, INC.                      SAN CARLOS CO-TENANCY,
a California corporation                 a tenancy in common

                                         By: III CENTRUM ASSOCIATES LIMITED
By: /s/ W. H. Lawrenson                  PARTNERSHIP,
    -----------------------------        a California limited partnership
    Name:  W.H. Lawrenson                Managing Co-Owner
           ----------------------
    Title: CFO
           ----------------------
                                         By: Centrum III Development Corporation
                                               a California corporation
                                               its general partner
By: /s/ Tim C. Johnson
    -----------------------------
    Name:  Tim C. Johnson
           ----------------------
    Title: President                           By: /s/ William Wilson
           ----------------------                 ------------------------------
                                               Name:  William Wilson
                                                      --------------------------
                                               Title: President
                                                      --------------------------


                                               By:______________________________
                                               Name:____________________________
                                               Title:___________________________

-36-

EXHIBIT A

ATTACHED TO AND FORMING A PART OF
LEASE AGREEMENT
DATED AS OF AUGUST 24, 1998
BETWEEN
SAN CARLOS CO-TENANCY, AS LANDLORD,
AND
NATUS MEDICAL, INC., AS TENANT ("LEASE")

THE PREMISES AND BUILDINGS

San Carlos II & III, San Carlos, California Stacking Plan

[STACKING PLANS APPEARS HERE]

INITIALS:

                      Landlord /s/ WW
                               -----------------
                      Tenant   /s/ WHL
                               -----------------

Exhibit A, Page 1


EXHIBIT A-1

ATTACHED TO AND FORMING A PART OF
LEASE AGREEMENT
DATED AS OF AUGUST 24, 1998
BETWEEN
SAN CARLOS CO-TENANCY, AS LANDLORD,
AND
NATUS MEDICAL, INC., AS TENANT ("LEASE")

THE EXISTING PREMISES

San Carlos II & III, San Carlos, California Stacking Plan

[STACKING PLANS APPEARS HERE]

INITIALS:

                       Landlord /s/ WW
                                -----------------
                       Tenant   /s/ WHL
                                -----------------

Exhibit A-1, Page 1


EXHIBIT A-2

ATTACHED TO AND FORMING A PART OF
LEASE AGREEMENT
DATED AS OF AUGUST 24, 1998
BETWEEN
SAN CARLOS CO-TENANCY, AS LANDLORD,
AND
NATUS MEDICAL, INC., AS TENANT ("LEASE")

THE FIRST EXPANSION PREMISES

San Carlos II & III, San Carlos, California Stacking Plan

[STACKING PLANS APPEARS HERE]

INITIALS:

                        Landlord /s/ WW
                                 -----------------
                        Tenant   /s/ WHL
                                 -----------------

Exhibit A-2, Page 1


EXHIBIT A-3

ATTACHED TO AND FORMING A PART OF
LEASE AGREEMENT
DATED AS OF AUGUST 24, 1998
BETWEEN
SAN CARLOS CO-TENANCY, AS LANDLORD,
AND
NATUS MEDICAL, INC., AS TENANT ("LEASE")

THE SECOND EXPANSION PREMISES

San Carlos II & III, San Carlos, California Stacking Plan

[STACKING PLANS APPEARS HERE]

INITIALS:

                        Landlord /s/ WW
                                 -----------------
                        Tenant   /s/ WHL
                                 -----------------

Exhibit A-3, Page 1


EXHIBIT A-4

ATTACHED TO AND FORMING A PART OF
LEASE AGREEMENT
DATED AS OF AUGUST 24, 1998
BETWEEN
SAN CARLOS CO-TENANCY, AS LANDLORD,
AND
NATUS MEDICAL, INC., AS TENANT ("LEASE")

THE TERMINATION PREMISES

San Carlos II & III, San Carlos, California Stacking Plan

[STACKING PLANS APPEARS HERE]

INITIALS:

                       Landlord /s/ WW
                                -----------------
                       Tenant   /s/ WHL
                                -----------------

Exhibit A-4, Page 1


EXHIBIT B

ATTACHED TO AND FORMING A PART OF
LEASE AGREEMENT
DATED AS OF AUGUST 24, 1998
BETWEEN
SAN CARLOS CO-TENANCY, AS LANDLORD,
AND
NATUS MEDICAL, INC., AS TENANT ("LEASE")

CONSTRUCTION RIDER

1. Tenant Improvements. Tenant shall with reasonable diligence through ASI General Contractors (the "Contractor") construct and install in the Premises the improvements and fixtures provided for in this Construction Rider ("Tenant Improvements"). Upon request by Landlord, Tenant shall designate in writing an individual authorized to act as Tenant's Representative with respect to all approvals, directions and authorizations pursuant to this Construction Rider.

1.1. Plans. The initial Tenant Improvements (the "Initial Improvements") in the First Expansion Premises shall be constructed substantially as shown on the plans for the First Expansion Premises prepared by the Contractor, which plans are subject to Landlord's prior written consent, which consent shall not be unreasonably withheld. Upon execution of the Lease Tenant shall promptly submit to Landlord the plans and cost estimate for the Initial Improvements. Landlord shall respond to the plans and cost estimate for the Initial Improvements within three (3) Business Days after receipt thereof, specifying any changes or modifications Landlord reasonably desires in the plans for the Initial Improvements. The Contractor will then revise the plans for the Initial Improvements and resubmit them to Landlord and Tenant for their approval and the Contractor will provide Landlord and Tenant with a revised cost estimate. Landlord shall approve or disapprove the same within three (3) Business Days after receipt or specify needed changes or corrections (and the process shall continue as needed to obtain Landlord's approval). Tenant is using Ms. Terri Boardman to assist Tenant in the process.

Following delivery of the Second Expansion Premises to Tenant, Tenant will cause an architect who Tenant will retain as the space planner ("Space Planner") to prepare a space plan ("Space Plan"), at Tenant's expense, for construction of Tenant Improvements ("Additional Improvements") in the First Expansion Premises and the Second Expansion Premises. The Space Planner is subject to Landlord's prior written approval, which approval shall not be unreasonably withheld or delayed.

As soon as may be reasonably practicable after delivery of the Second Expansion Premises, the Space Planner will prepare and deliver to Landlord detailed plans and specifications sufficient to permit the construction of the Additional Improvements by the Contractor ("Construction Documents"). After Landlord has approved the Construction

Exhibit B, Page 1


Documents, which approval shall not be unreasonably withheld, the Contractor will provide Landlord and Tenant with a cost estimate for the work shown in the Construction Documents. Landlord shall respond to the Construction Documents and cost estimate within three (3) Business Days after receipt thereof, specifying any changes or modifications Landlord desires in the Construction Documents. The Space Planner will then revise the Construction Documents and resubmit them to Landlord and Tenant for their approval and the Contractor will provide Landlord and Tenant with a revised cost estimate. Landlord shall approve or disapprove the same within three (3) Business Days after receipt. The revised Construction Documents and cost estimate, as approved by Tenant and Landlord, are hereinafter referred to as the "Final Construction Documents" and "Final Cost Estimate," respectively.

If Landlord fails to give its written response to the foregoing items (Space Plans, Working Drawings, etc.) within the time specified hereinabove, then each day of delay beyond the time specified hereinabove for Landlord's response shall be one (1) day of "Landlord Delay." The Rent Commencement Date for the applicable Suite within the Premises shall be extended day for day for each day of Landlord Delay with respect to such Suite.

Additional interior decorating services and advice on the furnishing and decoration of the Premises, such as the selection of fixtures, furnishings or design of mill work, shall be provided by Tenant at its expense, but shall be subject to the reasonable approval of Landlord.

1.2. Construction. Upon approval by Landlord and Tenant of the Final Construction Documents and the Final Cost Estimate, the Contractor shall proceed with reasonable diligence to cause the Tenant Improvements to be Substantially Completed. The Tenant Improvements shall be deemed to be "Substantially Completed" when they have been completed in accordance with the Final Construction Documents except for finishing details, minor omissions, decorations and mechanical adjustments of the type normally found on an architectural "punch list". (The definition of Substantially Completed shall also define the terms "Substantial Completion" and "Substantially Complete").

If Tenant or Tenant's Contractor or subcontractors, agents or employees, discovers any ACM (as hereinafter defined) in the First Expansion Premises or the Second Expansion Premises during demolition of the existing tenant improvements in the First Expansion Premises or the Second Expansion Premises, or during construction of Tenant Improvements (to which Landlord is contributing the Allowance, as hereinafter defined) within the First Expansion Premises or the Second Expansion Premises, then Tenant shall cause its contractor to immediately cease any work which may disturb the ACM and shall notify Landlord ("Tenant's ACM Notice") no later than forty-eight (48) hours after such discovery. Landlord shall, at its expense, remove or, at its option, encapsulate or contain the ACM in compliance with applicable Laws. In the event ACM is discovered in the Premises and reported to Landlord as provided in the preceding sentence above prior to, or during, construction of any Tenant Improvements within the Premises, the Rent Commencement Date of the applicable portion of the Premises shall be extended by the number of days from (but not including) the date of Tenant's ACM Notice through the date Landlord has completed the required removal of the ACM from the Premises to the extent required by and in accordance with all applicable governmental regulations and Tenant shall have no other claim against Landlord for delay in construction. If Tenant or Tenant's Contractor or subcontractors, agents or employees, discovers any ACM in the First Expansion Premises or the Second Expansion Premises during Alterations in First Expansion Premises or the Second

Exhibit B, Page 2


Expansion Premises subsequent to the applicable Rent Commencement Date, then Tenant shall cause its contractor to immediately cease any work which may disturb the ACM and shall notify Landlord ("Tenant's Additional ACM Notice") no later than forty-eight (48) hours after such discovery. Tenant's obligations to pay Rent shall not be affected by the discovery of ACM during Alterations. Landlord shall, at its expense, remove or, at its option, encapsulate or contain the ACM in compliance with applicable Laws. Landlord agrees to indemnify Tenant, its employees and contractors, against liability arising out of any removal of ACM by Landlord except for liability arising out of the negligence of Tenant, its contractors, subcontractors, agents or employees or Tenant's failure to report ACM discovered by Tenant or Tenant's Contractor or subcontractors, agents or employees, or Tenant's failure to perform its obligations under this Lease. For purposes of this Exhibit B, ACM means such material that contains the minimum amount of asbestos to cause its abatement as regulated by the procedures contained in the United States Environmental Protection Agency's National Emission Standard for Asbestos (40 CFR Sec. 61.140-61.156). Tenant covenants that it will not install, or permit to be installed, ACM in the Premises.

Following Substantial Completion of the Tenant Improvements (or as soon thereafter as may be reasonably practicable and in any event within 30 days after Substantial Completion), Landlord and Tenant shall inspect the Premises and jointly prepare a "punch list" of agreed items of construction remaining to be completed. The Contractor shall complete the items set forth in the punch list as soon as reasonably possible. Tenant shall cooperate with and accommodate Landlord and Landlord's contractor in completing the items on the punch list.

1.3. Cost of Tenant Improvements. Landlord shall, in part in recognition of improvements made by Tenant to the Termination Premises, contribute (the "Allowance") up to the sum of (a) $6.00 per rentable square foot in the First Expansion Premises and the Second Expansion Premises toward the cost of the design (including preparation of space plans and Construction Documents), construction and installation of the Tenant Improvements in the First Expansion Premises and the Second Expansion Premises, and (b) up to $2,500.00 toward the cost of any refurbishment in the First Expansion Premises and the Second Expansion Premises combined. Landlord shall pay the Allowance in installments, the first of which shall be thirty (30) days following Substantial Completion of Tenant Improvements in the First Expansion Premises (based upon the Allowance times the rentable area in the First Expansion Premises), and the second installment shall be thirty (30) days following Substantial Completion of Tenant Improvements in the Second Expansion Premises. As a condition of payment of each installment of the Allowance Tenant shall provide to Landlord executed final lien waivers from the Contractor and each subcontractor and supplier who performed work or supplied materials in connection with the Tenant Improvements. The balance, if any, of the cost of the Tenant Improvements ("Additional Cost") in the First Expansion Premises, the Second Expansion Premises and the Existing Premises, including, but not limited to, usual markups for overhead, supervision and profit, shall be paid by Tenant to the Contractor.

1.4. Changes. If Tenant requests any change, addition or alteration in or to any Final Construction Documents ("Changes") Tenant shall cause the Space Planner to prepare additional Plans implementing such Change and deliver a copy to Landlord. As soon as practicable after the completion of such additional Construction Documents and deliver of same to Landlord, Tenant shall notify Landlord of the estimated cost of the Changes. Within three (3) Business Days after receipt of such cost estimate, Landlord shall notify Tenant in writing

Exhibit B, Page 3


whether Tenant approves the Change, which approval shall not be unreasonably withheld. If Landlord approves the Change (which approval shall not be unreasonably withheld), Tenant shall proceed with the Change and Tenant shall be liable for any Additional Cost resulting from the Change. If Landlord and Tenant fail to approve the Change within such three (3) Business Day period, construction of the Tenant Improvements shall proceed as provided in accordance with the original Construction Documents.

1.5. Delays. [Intentionally Deleted].

2. Delivery of Premises. Landlord shall deliver possession of the First Expansion Premises to Tenant upon execution of this Lease. Landlord shall deliver possession of the Second Expansion Premises to Tenant when Landlord obtains possession thereof from the Existing Tenant pursuant to the provisions of Section 2 of the Lease. If Landlord is unable for any reason to deliver possession of the First Expansion Premises or the Second Expansion Premises to Tenant on or before the respective Scheduled Commencement Dates, neither Landlord nor its representatives shall be liable to Tenant for any damage resulting from the delay in delivering possession to Tenant and the Lease shall remain in full force and effect unless and until it is terminated under the express provisions of this Paragraph.

Notwithstanding the foregoing, if the Second Expansion Premises Commencement Date has not occurred or been deemed to have occurred within six
(6) months after the Scheduled Second Expansion Premises Commencement Date, either party, by written notice to the other party given within ten (10) days after the expiration of such six (6) month period, may terminate this Lease with respect to the Second Expansion Premises without any liability to the other party; provided, however, that if the delay in the Second Expansion Premises Commencement Date is caused by delays of the type described in Section 26 -Force Majeure of the Lease, and if Tenant elects to terminate as provided above, then Tenant shall reimburse Landlord, within thirty (30) days after receipt of notification from Landlord of the amounts due, for any amounts expended or incurred by Landlord for the design, construction and installation of the Tenant Improvements and for brokerage commissions and legal fees in connection with the preparation and negotiation of the Lease.

3. Access to Premises. Landlord shall allow Tenant and Tenant's Representatives to enter the applicable portions of the Premises prior to the respective Commencement Dates to permit Tenant to make the Premises ready for its use and occupancy; provided, however, that prior to such entry of the Premises, Tenant shall provide evidence reasonably satisfactory to Landlord that Tenant's insurance, as described in Section 11.1 - Tenant's Insurance of the Lease, shall be in effect as of the time of such entry. Such permission may be revoked at any time upon twenty-four (24) hours notice, and Tenant and its Representatives shall not interfere with Landlord or Landlord's contractor in completing the Building or the Tenant Improvements.

Tenant agrees that Landlord shall not be liable in any way for any injury, loss or damage which may occur to any of Tenant's property placed upon or installed in the Premises prior to the Commencement Date, the same being at Tenant's sole risk, and Tenant shall be liable for all injury, loss or damage to persons or property arising as a result of such entry into the Premises by Tenant or its Representatives.

Exhibit B, Page 4


4. Ownership of Tenant Improvements. All Tenant Improvements, whether installed by Landlord or Tenant, shall become a part of the Premises, shall be the property of Landlord and, subject to the provisions of the Lease, shall be surrendered by Tenant with the Premises, without any compensation to Tenant, at the expiration or termination of the Lease in accordance with the provisions of the Lease.

INITIALS:

                   Landlord  /s/ WW
                             -----------------
                   Tenant    /s/ WHL
                             -----------------

Exhibit B, Page 5


EXHIBIT C

ATTACHED TO AND FORMING A PART OF
LEASE AGREEMENT
DATED AS OF AUGUST 24, 1998
BETWEEN
SAN CARLOS CO-TENANCY, AS LANDLORD.
AND
NATUS MEDICAL, INC., AS TENANT ("LEASE")

BUILDING RULES

The following Building Rules are additional provisions of the foregoing Lease to which they are attached. The capitalized terms used herein have the same meanings as these terms are given in the Lease.

1. Use of Common Areas. Tenant will not obstruct the sidewalks, halls, passages, exits, entrances, or stairways of the Building ("Common Areas"), and Tenant will not use the Common Areas for any purpose other than ingress and egress to and from the Premises. The Common Areas, except for the sidewalks, are not open to the general public and Landlord reserves the right to control and prevent access to the Common Areas of any person whose presence, in Landlord's opinion, would be prejudicial to the safety, reputation and interests of the Building and its tenants.

2. No Access to Roof. Tenant has no right of access to the roof of the Building and will not install, repair or replace any antenna, aerial, aerial wires, fan, air-conditioner or other device on the roof of the Building, without the prior written consent of Landlord, which consent shall not be unreasonably withheld or delayed for construction or alterations of an portion of the air- conditioning system located on the roof, including any work to such system that affects the roof. Landlord's prior consent to access to the roof shall not be required for the commercial Heating, Ventilating and Air-Conditioning contractor which is to be approved by Landlord pursuant to the provisions of Section 7.2 of the Lease when such contractor performs maintenance and repair to the air- conditioning system servicing the Premises. Any device installed on the roof without Landlord's written consent is subject to removal at Tenant's expense without notice at any time. In any event Tenant will be liable for any damages or repairs incurred or required as a result of its installation, use, repair, maintenance or removal of such devices on the roof and agrees to indemnify and hold harmless Landlord from any liability, loss, damage, cost or expense, including reasonable attorneys' fees, arising from any activities of Tenant or of Tenant's Representatives on the roof of the Building.

3. Signage. Tenant shall have the right, at Tenant's sole cost and expense, to install an unlighted sign on the Building identifying Tenant (a) subject to Landlord's reasonable approval as to location, size, color, materials, method of attachment to the Building, and all other aspects of such sign, (b) consistent with the current San Carlos Business Park's signage program, and (c) subject to ordinances, regulations and any approval from the City of San Carlos, California. No sign, placard, picture, name, advertisement or notice visible from the exterior of the Premises will be inscribed, painted, affixed or otherwise displayed by Tenant on or in any

Exhibit C, Page 1


part of the Building without the prior written consent of Landlord. Landlord reserves the right to adopt and furnish Tenant with general guidelines relating to signs in or on the Building. All approved signage will be inscribed, painted or affixed at Tenant's expense by a person approved by Landlord, which approval will not be unreasonably withheld.

4. Prohibited Uses. The Premises will not be used, for lodging or for the sale of goods to the general public (except that Tenant shall be permitted to ship goods FOB San Carlos from the Premises without any such shipment constituting a violation of the provisions of this paragraph). Tenant will not permit any food preparation on the Premises except that Tenant may use Underwriters' Laboratory approved equipment for brewing coffee, tea, hot chocolate and similar beverages so long as such use is in accordance with all applicable federal, state and city laws, codes, ordinances, rules and regulations. Notwithstanding the foregoing, Tenant may use a UL approved microwave oven in the Premises to warm foods and beverages for consumption by Tenant's employees and clients, provided that any such use is strictly non- commercial, is in accordance with all applicable Laws, and does not generate any annoying noise, odors or sanitation problems.

5. Janitorial Services. Tenant will be responsible, at Tenant's expense, to keep the Premises clean, including janitorial service at such times as is reasonably determined by Tenant. Tenant enter into an agreement with a janitorial service to clean the Premises during week-days, which contract and janitorial company shall be subject to Landlord's prior written consent, which consent shall not be unreasonably withheld.

6. Keys And Locks. Tenant, at its cost, shall provide keys for each door or lock in the Premises, and the Buildings in which each portion of the Premises is located if there are separate doors for the Buildings, and Tenant shall provide Landlord two (2) keys for each door and lock. Tenant will not alter any locks or install any new or additional lock or bolt on any door of its Premises or on any other part of the Building without providing Landlord with two (2) keys for any such lock. On the termination of the Lease, Tenant will deliver to Landlord all keys to any locks or doors in the Building which have been obtained by Tenant.

7. Freight. Landlord reserves the right to require that heavy objects will stand on wood strips of such length and thickness as is necessary to properly distribute the weight. Landlord will not be responsible for loss of or damage to any such property from any cause, and Tenant will be liable for all damage or injuries caused by moving or maintaining such property.

8. Nuisances And Dangerous Substances. Tenant will not conduct itself or permit Tenant's Representatives or Visitors to conduct themselves, in the Premises or anywhere on or in the Property in a manner which is offensive or unduly annoying to any other Tenant or Landlord's property managers. Tenant will not install or operate any phonograph, radio receiver, musical instrument, or television or other similar device in any part of the Common Areas and shall not operate any such device installed in the Premises in such manner as to disturb or annoy other tenants of the Building. Tenant will not use or keep in the Premises or the Property any kerosene, gasoline or other combustible fluid or material other than limited quantities thereof reasonably necessary for the maintenance of office equipment, or, without Landlord's prior written approval, use any method of heating or air conditioning other than that supplied by Landlord. Tenant will not use or keep any foul or noxious gas or substance in the Premises (except as may appear on Exhibit F attached hereto) or permit or suffer the Premises to be

Exhibit C, Page 2


occupied or used in a manner offensive or objectionable to Landlord or other occupants of the Building by reason of noise, odors or vibrations, or interfere in any way with other tenants or those having business therein. Tenant will not bring or keep any animals in or about the Premises or the Property.

9. Building Name And Address. Without Landlord's prior written consent, Tenant will not use the name of the Building in connection with or in promoting or advertising Tenant's business except as Tenant's address.

10. Building Directory. [Intentionally deleted]

11. Window Coverings. [Intentionally deleted]

12. Floor Coverings. Tenant will be liable for the cost of repair of any damage resulting from the removal of any floor covering by Tenant or its contractors, employees or invitees.

13. Wiring and Cabling Installations. No boring or cutting for wires or cables will be allowed without the prior written consent of Landlord.

14. Office Closing Procedures. [Intentionally deleted]

15. Plumbing Facilities. The toilet rooms, toilets, urinals, wash bowls and other apparatus shall not be used for any purpose other than that for which they were constructed and no foreign substance of any kind whatsoever shall be disposed of therein. Tenant will be liable for any breakage, stoppage or damage resulting from the violation of this rule by Tenant, its employees or invitees.

16. Use of Hand Trucks. [Intentionally deleted].

17. Refuse. Tenant shall store all Tenant's trash and garbage within the Premises or in other facilities designated by Landlord for such purpose. Tenant shall not place in any trash box or receptacle any material which cannot be disposed of in the ordinary and customary manner of removing and disposing of trash and garbage in the city in which the Building is located without being in violation of any law or ordinance governing such disposal. Tenant shall comply with the requirements of any recycling program adopted by Landlord for the Building.

18. Soliciting. Canvassing, peddling, soliciting and distribution of handbills or any other written materials in the Building are prohibited, and Tenant will cooperate to prevent the same.

19. Parking. Tenant will use, and cause Tenant's Representatives and Visitors to use, any parking spaces to which Tenant is entitled under the Lease in a manner consistent with Landlord's directional signs and markings in the Parking Facility. Specifically, but without limitation, Tenant will not park, or permit Tenant's Representatives or Visitors to park, in a manner that impedes access to and from the Building or the Parking Facility or that violates space reservations for handicapped drivers registered as such with the California Department of Motor Vehicles. Landlord may use such reasonable means as may be necessary to enforce the

Exhibit C, Page 3


directional signs and markings in the Parking Facility, including but not limited to towing services, and Landlord will not be liable for any damage to vehicles towed as a result of noncompliance with such parking regulations.

20. Fire, Security and Safety Regulations. Tenant will comply with all safety, security, fire protection and evacuation measures and procedures established any governmental agency or reasonably established by Landlord.

21. Responsibility for Theft. Tenant assumes any and all responsibility for protecting the Premises from theft, robbery and pilferage, which includes keeping doors locked and other means of entry to the Premises closed.

22. Sales and Auctions. Tenant will not conduct or permit to be conducted any sale by auction in, upon or from the Premises or elsewhere in the Property, whether said auction be voluntary, involuntary, pursuant to any assignment for the payment of creditors or pursuant to any bankruptcy or other insolvency proceeding.

23. Waiver of Rules. Landlord may waive any one or more of these Building Rules for the benefit of any particular tenant or tenants, but no such waiver by Landlord will be construed as a waiver of such Building Rules in favor of any other tenant or tenants nor prevent Landlord from thereafter enforcing these Building Rules against any or all of the tenants of the Building.

24. Effect on Lease. These Building Rules are in addition to, and shall not be construed to in any way modify or amend, in whole or in part, the terms, covenants, agreements and conditions of the Lease. Violation of these Building Rules constitutes a failure to fully perform the provisions of the Lease, as referred to in Section 15.1 - "Events of Default".

25. Non-Discriminatorv Enforcement. Subject to the provisions of the Lease (and the provisions of other leases with respect to other tenants), Landlord shall use reasonable efforts to enforce these Building Rules in a non- discriminatory manner, but in no event shall Landlord have any liability for any failure or refusal to do so (and Tenant's sole and exclusive remedy for any such failure or refusal shall be injunctive relief preventing Landlord from enforcing any of the Building Rules against Tenant in a manner that discriminates against Tenant).

26. Additional and Amended Rules. Landlord reserves the right to rescind or amend these Building Rules and/or adopt any other and reasonable rules and regulations as in its judgment may from time to time be needed for the safety, care and cleanliness of the Building and for the preservation of good order therein.

INITIALS:

                   Landlord  /s/ WW
                             -----------------
                   Tenant    /s/ WHL
                             -----------------

Exhibit C, Page 4


EXHIBIT D

ATTACHED TO AND FORMING A PART OF
LEASE AGREEMENT
DATED AS OF AUGUST 24, 1998
BETWEEN
SAN CARLOS CO-TENANCY, AS LANDLORD,
AND
NATUS MEDICAL, INC., AS TENANT ("LEASE")

ADDITIONAL PROVISIONS RIDER

35. PARKING.

(a) Tenant's Parking Rights. Landlord shall provide Tenant, on an unassigned and non-exclusive basis, for use by Tenant and Tenant's Representatives and Visitors, at the users sole risk, one (1) parking space in the Parking Facility for each three hundred thirty-three (333) rentable square feet of additional space leased to Tenant. The parking spaces to be made available to Tenant hereunder may contain a reasonable mix of spaces for compact cars and up to ten percent (10%) of the unassigned spaces may also be designated by Landlord as Building visitors' parking.

(b) Availability of Parking Spaces. Landlord shall take reasonable actions to ensure the availability of the parking spaces leased by Tenant, but Landlord does not guarantee the availability of those spaces at all times against the actions of other tenants of the Building and users of the Parking Facility. Access to the Parking Facility may, at Landlord's option, be regulated by card, pass, bumper sticker, decal or other appropriate identification issued by Landlord. Landlord retains the right to revoke the parking privileges of any user of the Parking Facility who violates the rules and regulations governing use of the Parking Facility (and Tenant shall be responsible for notifying any employee of Tenant or other person using parking spaces allocated to Tenant to comply with all parking rules and regulations).

(c) Assignment and Subletting. Notwithstanding any other provision of the Lease to the contrary, Tenant shall not assign its rights to the parking spaces or any interest therein, or sublease or otherwise allow the use of all or any part of the parking spaces to or by any other person, except either (i) in connection with an assignment of the Lease, or a sublease of all, or a portion of, the Premises, to a Transferee; or (ii) with Landlord's prior written consent, which may be granted or withheld by Landlord in its sole discretion. In the event of any separate assignment or sublease of parking space rights that is approved by Landlord, Landlord shall be entitled to receive, as additional Rent hereunder, one hundred percent (100%) of any profit received by Tenant in connection with such assignment or sublease.

(d) Condemnation, Damage or Destruction. In the event the Parking Facility is the subject of a Condemnation, or is damaged or destroyed, and this Lease is not terminated, and if in such event the available number of parking spaces in the Parking Facility is permanently

Exhibit D, Page 1


reduced, then Tenant's rights to use parking spaces hereunder may, at the election of Landlord, thereafter be reduced in proportion to the reduction of the total number of parking spaces in the Parking Facility. In such event, Landlord reserves the right to reduce the number of parking spaces to which Tenant is entitled or to relocate some or all of the parking spaces to which Tenant is entitled to other areas in the Parking Facility in a non- discriminatory manner relative to other tenants in the Project.

36. RIGHT OF FIRST OFFER.

(a) Provided that Natus Medical, Inc. has not assigned this Lease or sublet any or all of the Premises other than to an Affiliate (it being intended that all rights pursuant to this provision are and shall be personal to the original Tenant under this Lease and its Affiliates and shall not be transferable or exercisable for the benefit of any Transferee other than an Affiliate), and provided Tenant is not in default under this Lease beyond any applicable cure period at the time of the exercise of any such right or at any time thereafter until delivery of possession of the space to Tenant, and subject to any and all rights of other tenants in the Project with respect to such space (including renewal and extension rights and rights of first offer, first negotiation, first refusal or other expansion rights) existing as of the date of this Lease, Tenant shall have a one time right of first offer to lease the following space in the Building: 1509 Industrial Road, containing approximately 4,800 rentable square feet; and 1549 Industrial Road, containing approximately 2,170 rentable square feet.

(b) Such right of first offer (i) may only be exercised with respect to vacant space or space which has been previously leased and as to which an existing tenant of the Building has elected not to extend its lease or re-lease such space and (ii) may only be exercised with respect to all of the space being offered by Landlord. If any space qualifying for such right of first offer becomes available, Landlord shall offer to lease such space to Tenant at the same rent and on the same terms that Landlord intends to offer to other prospective tenants. Tenant shall have ten (10) Business Days following receipt of Landlord's offer with respect to any such space within which to notify Landlord in writing of its intention to lease such space, and such notice, if given by Tenant, shall constitute an acceptance of Landlord's terms for the lease of such space. If Tenant exercises such right of first offer, the space to be leased by Tenant shall be leased on the same terms and conditions as are contained in this Lease except for the economic and other terms specifically set forth in Landlord's notice, and the parties shall execute an amendment to this Lease to include such space in the Premises and otherwise to provide for the leasing of such space on such terms. If Tenant fails so to exercise Tenant's right of first offer within such ten (10) Business Day period, Landlord may thereafter lease such space to other prospective tenants; provided, however, that if Landlord proposes to lease such space at an effective rent that is less than ninety percent (90%) of the effective rent proposed to Tenant, or upon other terms which are substantially more favorable to the prospective tenant, Landlord shall first re-offer such space to Tenant at such lower rent and/or more favorable terms in accordance with the provisions of this paragraph.

(c) If Tenant does not lease the right of first offer space from Landlord when it is first offered to Tenant by Landlord, or when it is re- offered to Tenant because the economic terms first offered to Tenant have materially changed, as described in the last sentence of paragraph (b)

Exhibit D, Page 2


above, then this right of first offer shall terminate and Tenant shall have no further rights to lease any of the right of first offer space.

37. EXTENSION OPTION.

Provided that Natus Medical, Inc. has not assigned this Lease or sublet any or all of the Premises other than to an Affiliate (it being intended that all rights pursuant to this provision are and shall be personal to the original Tenant under this Lease and its Affiliates and shall not be transferable or exercisable for the benefit of any Transferee other than an Affiliate), and provided Tenant is not in default under this Lease beyond any applicable cure period at the time of exercise or at any time thereafter until the beginning of any such extension of the Term, Tenant shall have the option (the "EXTENSION OPTION") to extend the Term for one (1) additional consecutive period of five (5) years ("EXTENSION PERIOD"), by giving written notice to Landlord of the exercise of any such Extension Option at least twelve (12) months, but not more than fifteen
(15) months, prior to the expiration of the initial Term. The exercise of any Extension Option by Tenant shall be irrevocable and shall cover the entire Premises leased by Tenant pursuant to this Lease. Upon such exercise, the term of the Lease shall automatically be extended for the applicable Extension Period without the execution of any further instrument by the parties; provided that Landlord and Tenant shall, if requested by either party, execute and acknowledge an instrument confirming the exercise of the Extension Option. Any Extension Option shall terminate if not exercised precisely in the manner provided herein. Any extension of the Term shall be upon all the terms and conditions set forth in this Lease and all Exhibits thereto, except that: (i) Tenant shall have no further option to extend the Term of the Lease, other than as specifically set forth herein; (ii) Landlord shall not be obligated to contribute funds toward the cost of any remodeling, renovation, alteration or improvement work in the Premises; and (iii) Base Rent for any such Extension Period shall be the then Fair Market Base Rental (as defined below) for the Premises for the space and term involved, which shall be determined as set forth below.

(a) "Fair Market Base Rental" shall mean the "fair market" Base Rent at the time or times in question for the applicable space, based on the prevailing rentals then being charged to tenants in other similar type buildings in similar type projects in the general vicinity of the Project of comparable size, location, quality and age as the Project for leases with terms equal to the Extension Period, taking into account the creditworthiness and financial strength of the tenant, the financial guaranties provided by the tenant (if any), the value of market concessions (including the value of construction, renovation, moving and other allowances or rent credits), the desirability, location in the building, size and quality of the space, tenant finish allowance and/or tenant improvements, included services, operating expenses and tax and expense stops or other escalation clauses, and brokerage commissions, for comparable space in the buildings which are being used for comparison. Fair Market Base Rental shall also reflect the then prevailing rental structure for comparable office buildings in the general vicinity of the Property, so that if, for example, at the time Fair Market Base Rental is being determined the prevailing rental structure for comparable space and for comparable lease terms includes periodic rental adjustments or escalations, Fair Market Base Rental shall reflect such rental structure.

Exhibit D, Page 3


(b) Landlord and Tenant shall endeavor to agree upon the Fair Market Base Rental. If they are unable to so agree within thirty (30) day's after receipt by Landlord of Tenant's notice of exercise of the Extension Option, Landlord and Tenant shall mutually select a licensed real estate broker who is active in the leasing of office space in the general vicinity of the Property. Landlord shall submit Landlord's determination of Fair Market Base Rental and Tenant shall submit Tenant's determination of Fair Market Base Rental to such broker, at such time or times and in such manner as Landlord and Tenant shall agree (or as directed by the broker if Landlord and Tenant do not promptly agree). The broker shall select either Landlord's or Tenant's determination as the Fair Market Base Rental, and such determination shall be binding on Landlord and Tenant. If Tenant's determination is selected as the Fair Market Base Rental, then Landlord shall bear all of the broker's cost and fees. If Landlord's determination is selected as the Fair Market Base Rental, then Tenant shall bear all of the broker's cost and fees.

(c) In the event the Fair Market Base Rental for any Extension Period has not been determined at such time as Tenant is obligated to pay Base Rent for such Extension Period, Tenant shall pay as Base Rent pending such determination, the Base Rent in effect for such space immediately prior to the Extension Period; provided, that upon the determination of the applicable Fair Market Base Rental, any shortage of Base Rent paid, together with interest at the rate specified in the Lease, shall be paid to Landlord by Tenant.

(d) In no event shall the Base Rent during any Extension Period be less than the Base Rent in effect immediately prior to such Extension Period.

(e) The term of this Lease, whether consisting of the Initial Term alone or the Initial Term as extended by any Extension Period (if any Extension Option is exercised), is referred to in this Lease as the "Term."

38. EXISTING LEASE.

Tenant is leasing the Existing Premises and the Termination Premises pursuant to a lease dated March 8,1993 with New York Life Insurance Company (the "Original Landlord"), which Existing Lease was amended by Lease Amendment No. 1 dated as of March 29, 1996, and Lease Amendment No. 2 dated as of August 8, 1997 (as so amended, the "Existing Lease"). Landlord is successor-in-interest to Original Landlord under the Existing Lease. The Existing Lease shall terminate November 15, 1998, and Tenant shall remain liable for those obligations accruing under the Existing Lease through November 15, 1998.

INITIALS:

                   Landlord  /s/ WW
                             -----------------
                   Tenant    /s/ WHL
                             -----------------

Exhibit D, Page 4


EXHIBIT E

ATTACHED TO AND FORMING A PART OF
LEASE AGREEMENT
DATED AS OF AUGUST 24, 1998
BETWEEN
SAN CARLOS CO-TENANCY, AS LANDLORD,
AND
NATUS MEDICAL, INC., AS TENANT ("LEASE")

ASBESTOS NOTIFICATION

In accordance with California law (Health & Safety Code Section 25915), we are writing to provide you with information concerning the presence of asbestos-containing construction materials ("ACM") in your building. This notice describes the location of these materials and requests your assistance in following proper handling procedures and in reporting any deterioration in the condition of these materials that you may notice.

In July 1989, ATC Environmental, Inc., a professional asbestos consultant, was retained to determine whether ACM was present in any of the six buildings at San Carlos Commerce Center located at 1551-1599 and 1501-1549 Industrial Road, San Carlos, California. The survey concluded that asbestos was present in the floor tile mastic in Suite 1511 (storage room) of the building at 1501 Industrial Road and Suite 1581 (break room) of the building at 1581 Industrial Road. The mastic materials were classified as low priority ACM and are considered to be non-friable, unless disturbed through renovation, maintenance or other activities, because the asbestos is bound and contained in a secondary material. A January 1990 survey by Starcraft Roof Service and two episodes of asbestos sampling and testing by Hart Crowser, Inc. in February 1990, showed asbestos-containing materials to be present in the roofs of the buildings at 1551, 1561 and 1581 Industrial Road and in the parapet flashings of the roofs of all six buildings. However, it was concluded that the materials were well bound and not friable in their existing condition, unless ground, drilled or otherwise abraded.

Because any alterations in any of the buildings containing ACM could disturb the ACM and possibly release asbestos fibers into the air, the inhalation of which could present a health hazard, we must require that you contact the Building Management Office at (650) 349-5531, for detailed asbestos handling procedures and to obtain our approval prior to beginning such projects. This includes major alterations, but might also include such activities as drilling holes, installing electrical, telecommunication or computer lines, sanding floors, or removing ceiling tiles. In many cases, such activities will not affect asbestos materials, but you must check with us in advance, just in case. In addition, please contact the Building Management Office if you notice any deterioration in the condition of the ACM.

Exhibit E, Page 1


It is common knowledge that exposure to asbestos may cause development of certain diseases, including cancer and lung disease. However, because we are not physicians, scientists or industrial hygienists, we have no special knowledge of the health impact of exposure to the asbestos located in the identified buildings. If you have any concerns about the health effects of asbestos exposure, we urge you to contact the State or Federal Occupational Safety and Health Administration, the California State Department of Health Services or the local City or County Department of Health Services for more information.

The results of all of our existing asbestos surveys, test results and monitoring data, including descriptions of the laboratory testing methods employed, are available for your review and photocopying in the Building Management Office, located at 2929 Campus Drive, Suite 145 in San Mateo, California, during regular working hours upon request. If you would like to see these materials, please make an appointment with Genelle Osendorf at (650) 349- 5331, at least two working days in advance. Because we are not experts in the area of asbestos testing and abatement, we make no warranties as to the contents of the consultants' reports or the methods employed by the consultants or the thoroughness or accuracy of the survey or test results or any other matters.

Please be aware that you will be responsible for complying with all legal requirements for notifying your own employees, contractors, subtenants and agents, if any, of the information contained in this notice.

INITIALS:

                   Landlord  /s/ WW
                             -----------------
                   Tenant    /s/ WHL
                             -----------------

Exhibit E, Page 2


EXHIBIT F

ATTACHED TO AND FORMING A PART OF
LEASE AGREEMENT
DATED AS OF AUGUST 24, 1998
BETWEEN
SAN CARLOS CO-TENANCY, AS LANDLORD,
AND
NATUS MEDICAL, INC., AS TENANT ("LEASE")

LIST OF TENANT'S CHEMICALS

CO (0-20 ppm), C02 (0-10%), H2 (0-300 ppm), balance Air CO (0-20 ppm), C02 (0-10%), 02 (0-20%), balance Nitrogen

INITIALS:

                   Landlord  /s/ WW
                             -----------------
                   Tenant    /s/ WHL
                             -----------------


Exhibit F, Page 1


EXHIBIT 10.9

PROMISSORY NOTE

----------------------------------------------------------------------------------------------------------------------------------
Principal           Loan Date          Maturity        Loan No       Call       Collateral       Account       Officer    Initials
$250,000.00         03-24-1999         03-26-2004      94-310166      6B            02                           941
----------------------------------------------------------------------------------------------------------------------------------
     References in the shaded area are for Lender's use only and do not limit the applicability of this document to any particular
     loan or item.
----------------------------------------------------------------------------------------------------------------------------------
Borrower:  TIM C. JOHNSON                   Lender:  SCOTT VALLEY BANK
           1501 INDUSTRIAL ROAD                      CONTRA COSTA BANKING CENTER
           SAN CARLOS, CA 94070--4111                1500 N. CALIFORNIA BLVD.
                                                     WALNUT CREEK, CA 94596

==================================================================================================================================
Principal Amount: $250,000.00                           Interest Rate: 4.620%                         Date of Note: March 24, 1999

PROMISE TO PAY. I promise to pay to SCOTT VALLEY BANK ("Lender"), or order, in lawful money of the United States of America the principal amount of Two Hundred Fifty Thousand & 00/100 Dollars ($250,000.00), together with interest at the rate of 4.620% per annum on the unpaid principal balance from March 24, 1999, until paid in full.

PAYMENT. I will pay this loan In one principal payment of S250,000.00 plus interest on March 26, 2004. This payment due March 26, 2004, will be for all principal and accrued interest not yet paid. Interest on this Note is computed on a 365/365 simple interest basis; that is, by applying the ratio of the annual interest rate over the number of days in a year, multiplied by the outstanding principal balance, multiplied by the actual number of days the principal balance is outstanding. I will pay Lender at Lender's address shown above or at such other place as Lender may designate in writing. Unless otherwise agreed or required by applicable law, payments will be applied first to accrued unpaid interest, then to principal, and any remaining amount to any unpaid collection costs and late charges.

PREPAYMENT. I agree that all loan fees and other prepaid finance charges are earned fully as of the date of the loan and will not be subject to refund upon early payment (whether voluntary or as a result of default), except as otherwise required by law. Except for the foregoing, I may pay without penalty all or a portion of the amount owed earlier than it is due. Early payments will not, unless agreed to by Lender in writing, relieve me of my obligation to continue to make payments under the payment schedule. Rather, they will reduce the principal balance due.

LATE CHARGE. If a payment is 10 days or more late, I will be charged 5.000% of the regularly scheduled payment or $5.00, whichever Is greater.

DEFAULT. I will be in default if any of the following happens: (a) I fail to make any payment when due. (b) I break any promise I have made to Lender, or I fail to comply with or to perform when due any other term, obligation, covenant, or condition contained in this Note or any agreement related to this Note, or in any other agreement or loan I have with Lender. (C) Any representation or statement made or furnished to Lender by me or on my behalf is false or misleading in any material respect either now or at the time made or furnished.
(d) I die or become insolvent, a receiver is appointed for any part of my property, I make an assignment for the benefit of creditors, or any proceeding is commenced either by me or against me under any bankruptcy or insolvency laws.
(e) Any creditor tries to take any of my property on or in which Lender has a lien or security interest. This includes a garnishment of any of my accounts with Lender. (f) Any of the events described in this default section occurs with respect to any guarantor of this Note.

If any default, other than a default in payment, is curable and if I have not been given a notice of a breach of the same provision of this Note within the preceding twelve (12) months, it may be cured (and no event of default will have occurred) if I, alter receiving written notice from Lender demanding cure of such default: (a) cure the default within fifteen (15) days; or (b) if the cure requires more than fifteen (15) days, immediately initiate steps which Lender deems in Lender's sole discretion to be sufficient to cure the default and thereafter continue and complete all reasonable and necessary steps sufficient to produce compliance as soon as reasonably practical.

LENDER'S RIGHTS. Upon default, Lender may declare the entire unpaid principal balance on this Note and all accrued unpaid interest immediately due, without notice, and then I will pay that amount. Lender may hire or pay someone else to help collect this Note if I do not pay. I also will pay Lender that amount. This includes, subject to any limits under applicable law, Lender's attorneys' fees and Lender's legal expenses whether or not there is a lawsuit, including attorneys' fees and legal expenses for bankruptcy proceedings (including efforts to modify or vacate any automatic stay or injunction), appeals, and any anticipated post-judgment collection services. I also will pay any court costs, in addition to all other sums provided by law. This Note has been delivered to Lender and accepted by Lender in the State of California. If there is a lawsuit, I agree upon Lender's request to submit to the jurisdiction of the courts of CONTRA COSTA County, the State of California. Subject to the provisions on arbitration, this Note shall be governed by and construed in accordance with the laws of the State of California.

RIGHT OF SETOFF. I grant to Lender a contractual security interest in, and hereby assign, convey, deliver, pledge, and transfer to Lender all my right, title and interest in and to, my accounts with Lender (whether checking, savings, or some other account), including without limitation all accounts held jointly with someone else and all accounts I may open in the future, excluding however all IRA and Keogh accounts, and all trust accounts for which the grant of a security interest would be prohibited by law. I authorize Lender, to the extent permitted by applicable law, to charge or setoff all sums owing on this Note against any and all such accounts.

COLLATERAL. This Note is secured by ASSIGNMENT OF CERTIFICATE OF DEPOSIT
#94-831152.

ARBITRATION. Lender and I agree that all disputes, claims and controversies between us, whether individual, joint, or class in nature, arising from this Note or otherwise, including without limitation contract and tort disputes, shall be arbitrated pursuant to the Rules of the American Arbitration Association, upon request of either party. No act to take or dispose of any collateral securing this Note shall constitute a waiver of this arbitration agreement or be prohibited by this arbitration agreement. This includes, without limitation, obtaining injunctive relief or a temporary restraining order; invoking a power of sale under any deed of trust or mortgage; obtaining a writ of attachment or imposition of a receiver; or exercising any rights relating to personal property, including taking or disposing of such property with or without judicial process pursuant to Article 9 of the Uniform Commercial Code. Any disputes, claims, or controversies concerning the lawfulness or reasonableness of any act, or exercise of any right, concerning any collateral securing this Note, including any claim to rescind, reform, or otherwise modify any agreement relating to the collateral securing this Note, shall also be arbitrated, provided however that no arbitrator shall have the right or the power to enjoin or restrain any act of any party. Lender and I agree that in the event of an action for judicial foreclosure pursuant to California Code of Civil Procedure Section 726, or any similar provision in any other state, the commencement of such an action will not constitute a waiver of the right to arbitrate and the court shall refer to arbitration as much of such action, including counterclaims, as lawfully may be referred to arbitration. Judgment upon any award rendered by any arbitrator may be entered in any court having jurisdiction. Nothing in this Note shall preclude any party from seeking equitable relief from a court of competent jurisdiction. The statute of limitations, estoppel, waiver, laches, and similar doctrines which would otherwise be applicable in an action brought by a party shall be applicable in any arbitration proceeding, and the commencement of an arbitration proceeding shall be deemed the commencement of an action for these purposes. The Federal Arbitration Act shall apply to the construction, interpretation, and enforcement of this arbitration provision.


03-24-99                     PROMISSORY NOTE                            Page 2
Loan No. 94-310166             (Continued)
================================================================================

GENERAL PROVISIONS. Lender may delay or forgo enforcing any of its rights or remedies under this Note without losing them. I and any other person who signs, guarantees or endorses this Note, to the extent allowed by law, waive any applicable statute of limitations, presentment, demand for payment, protest and notice of dishonor. Upon any change in the terms of this Note, and unless otherwise expressly stated in writing, no party who signs this Note, whether as maker, guarantor, accommodation maker or endorser, shall be released from liability. All such parties agree that Lender may renew or extend (repeatedly and for any length of time) this loan, or release any party or guarantor or collateral; or impair, fail to realize upon or perfect Lender's security interest in the collateral. All such parties also agree that Lender may modify this loan without the consent of or notice to anyone other than the party with whom the modification is made.

PRIOR TO SIGNING THIS NOTE, I READ AND UNDERSTOOD ALL THE PROVISIONS OF THIS NOTE. I AGREE TO THE TERMS OF THE NOTE AND ACKNOWLEDGE RECEIPT OF A COMPLETED COPY OF THE NOTE.

BORROWER:

/s/ Tim C. Johnson
-------------------------------
TIM C. JOHNSON



EXHIBIT 10.9.1

ASSIGNMENT OF DEPOSIT ACCOUNT

------------------------------------------------------------------------------------------------------------------------------------
  Principal          Loan Date           Maturity        Loan No     Call     Collateral        Account         Officer    Initials
 $250,000.00         03-24-1999         03-26-2004      94-310166     6B          02                              941
------------------------------------------------------------------------------------------------------------------------------------
References in the shaded area are for Lender's use only and do not limit the applicability of this document to any particular loan
                                                             or item.
------------------------------------------------------------------------------------------------------------------------------------

Borrower:    TIM C. JOHNSON                                       Lender:  SCOTT VALLEY BANK
             1501 INDUSTRIAL ROAD                                          CONTRA COSTA BANKING CENTER
             SAN CARLOS, CA 94070-4111                                     1500 N. CALIFORNIA BLVD.
                                                                           WALNUT CREEK, CA 94596
Grantor:     NATUS MEDICAL, INC.
             1501 INDUSTRIAL ROAD
             SAN CARLOS, CA 94070-4111

====================================================================================================================================

THIS ASSIGNMENT OF DEPOSIT ACCOUNT Is entered into among TIM C. JOHNSON (referred to below as "Borrower"); NATUS MEDICAL, INC. (referred to below as "Grantor"); and SCOTT VALLEY BANK (referred to below as "Lender").

ASSIGNMENT. For valuable consideration, Grantor assigns and grants to Lender a security interest in the Collateral, including without limitation the deposit accounts described below, to secure the Indebtedness and agrees that Lender shall have the rights stated in this Agreement with respect to the Collateral, in addition to all other rights which Lender may have by law.

DEFINITIONS. The following words shall have the following meanings when used in this Agreement. Terms not otherwise defined in this Agreement shall have the meanings attributed to such terms in the Uniform Commercial Code. All references to dollar amounts shall mean amounts in lawful money of the United States of America.

Account. The word "Account" means the deposit account described below in the definition for "Collateral."

Agreement. The word "Agreement" means this Assignment of Deposit Account, as this Assignment of Deposit Account may be amended or modified from time to time, together with all exhibits and schedules attached to this Assignment of Deposit Account from time to time.

Borrower. The word "Borrower" means each and every person or entity signing the Note, including without limitation TIM C. JOHNSON.

Collateral. The word "Collateral" means the following described deposit account:

CERTIFICATE OF DEPOSIT #94-831152 issued by Lender in an amount not less than $250,000.00

together with (a) all interest, whether now accrued or hereafter accruing:
(b) all additional deposits hereafter made to the Account; (c) any and all proceeds from the Account; and (d) all renewals, replacements and substitutions for any of the foregoing.

In addition, the word "Collateral" includes all property of Grantor (however owned if owned by more than one person), in the possession of Lender (or in the possession of a third party subject to the control of Lender), whether existing now or later and whether tangible or intangible in character, including without limitation each and all of the following:

(a) All property to which Lender acquires title or documents of title.

(b) All property assigned to Lender.

(c) All promissory notes, bills of exchange, stock certificates, bonds, savings passbooks, time certificates of deposit, insurance policies, and all other instruments and evidences of an obligation.

(d) All records relating to any of the property described in this Collateral section, whether In the form of writing, microfilm, microfiche, or electronic media. SEE (e) BELOW

(e) UNDER NO CIRCUMSTANCE SHALL GRANTOR BE REQUIRED TO PROVIDE ADDITIONAL COLLATERAL BEYOND THE ABOVE ACCOUNT PLUS ACCRUED INTEREST

Event of Default. The words "Event of Default" mean and include without limitation any of the Events of Default set forth below in the section titled "Events of Default."

Grantor. The word "Grantor" means NATUS MEDICAL, INC. Any Grantor who signs this Agreement, but does not sign the Note, is signing this Agreement only to grant a security interest in Grantor's interest in the Collateral to Lender and is not personally liable under the Note except as otherwise provided by contract or law (e.g., personal liability under a guaranty or as a surety).

Guarantor. The word "Guarantor" means and includes without limitation each and all of the guarantors, sureties, and accommodation parties in connection with the Indebtedness.

Indebtedness. The word "Indebtedness" means the indebtedness evidenced by the Note, including all principal and interest, together with all other indebtedness and costs and expenses for which Grantor or Borrower is responsible under this Agreement or under any of the Related Documents.

Lender. The word "Lender" means SCOTT VALLEY BANK, its successors and assigns.

Note. The word "Note" means the note or credit agreement dated March 24, 1999, in the principal amount of $250,000.00 from Borrower to Lender, together with all renewals of, extensions of, modifications of, refinancings of, consolidations of and substitutions for the note or credit agreement.

Related Documents. The words "Related Documents" mean and include without limitation all promissory notes, credit agreements, loan agreements, environmental agreements, guaranties, security agreements, mortgages, deeds of trust, and all other instruments, agreements and documents, whether now or hereafter existing, executed in connection with the Indebtedness.

BORROWER'S WAIVERS AND RESPONSIBILITIES. Except as otherwise required under this Agreement or by applicable law, (a) Borrower agrees that Lender need not tell Borrower about any action or inaction Lender takes in connection with this Agreement; (b) Borrower assumes the responsibility for being and keeping informed about the Collateral; and (c) Borrower waives any defenses that may arise because of any action or inaction of Lender, including without limitation any failure of Lender to realize upon the Collateral or any delay by Lender in realizing upon the Collateral; and Borrower agrees to remain liable under the Note no matter what action Lender takes or fails to take under this Agreement.

GRANTOR'S REPRESENTATIONS AND WARRANTIES. Grantor warrants that: (a) this Agreement is executed at Borrower's request and not at the request of Lender;
(b) Grantor has the full right, power and authority to enter into this Agreement and to pledge the Collateral to Lender; (c) Grantor has established adequate means of obtaining from Borrower on a continuing basis information about Borrower's financial condition; and (d) tender has made no representation to Grantor about Borrower or Borrower's creditworthiness.

GRANTOR'S WAIVERS. Except as prohibited by applicable law, Grantor waives any right to require Lender to (a) make any presentment, protest,


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demand, or notice of any kind, including notice of change of any terms of repayment of the Indebtedness, default by Borrower or any other guarantor or surety, any action or nonaction taken by Borrower, Lender, or any other guarantor or surety of Borrower, or the creation of new or additional Indebtedness; (b) proceed against any person, including Borrower, before proceeding against Grantor; (c) proceed against any collateral for the Indebtedness, including Borrower's collateral, before proceeding against Grantor; (d) apply any payments or proceeds received against the Indebtedness in any order; (e) give notice of the terms, time, and place of any sale of any collateral pursuant to the Uniform Commercial Code or any other law governing such sale; (f) disclose any information about the Indebtedness, the Borrower, any collateral, or any other guarantor or surety, or about any action or nonaction of Lender; or (g) pursue any remedy or course of action in Lender's power whatsoever.

Grantor also waives any and all rights or defenses arising by reason of (h) any disability or other defense of Borrower, any other guarantor or surety or any other person; (i) the cessation from any cause whatsoever, other than payment in full, of the Indebtedness; (j) the application of proceeds of the Indebtedness by Borrower for purposes other than the purposes understood and intended by Grantor and Lender; (k) any act of omission or commission by Lender which directly or indirectly results in or contributes to the discharge of Borrower or any other guarantor or surety, or the Indebtedness, or the loss or release of any collateral by operation of law or otherwise; (I) any statute of limitations in any action under this Agreement or on the Indebtedness; or (m) any modification or change in terms of the Indebtedness, whatsoever, including without limitation, the renewal, extension, acceleration, or other change in the time payment of the Indebtedness is due and any change in the interest rate.

Grantor waives all rights and defenses arising out of an election of remedies by Lender, even though that election of remedies, such as nonjudicial foreclosure with respect to security for a guaranteed obligation, has destroyed Grantor's rights of subrogation and reimbursement against Borrower by the operation of
Section 580d of the California Code of Civil Procedure, or otherwise.

This waiver includes, without limitation, any loss of rights Grantor may suffer by reason of any rights or protections of Borrower in connection with any anti-deficiency laws, or other laws limiting or discharging the Indebtedness or Borrower's obligations (including, without limitation, Section 726, 580a, 580b, and 580d of the California Code of Civil Procedure). Grantor waives all rights and protections of any kind which Grantor may have for any reason, which would affect or limit the amount of any recovery by Lender from Grantor following a nonjudicial sale or judicial foreclosure of any real or personal property security for the Indebtedness including, but not limited to, the right to any fair market value hearing pursuant to California Code of Civil Procedure Section 580a.

Grantor understands and agrees that the foregoing waivers are waivers of substantive rights and defenses to which Grantor might otherwise be entitled under state and federal law. The rights and defenses waived include, without limitation, those provided by California laws of suretyship and guaranty, anti-deficiency laws, and the Uniform Commercial Code. Grantor acknowledges that Grantor has provided these waivers of rights and defenses with the intention that they be fully relied upon by Lender. Until all Indebtedness is paid in full, Grantor waives any right to enforce any remedy Lender may have against Borrower or any other guarantor, surety, or other person, and further, Grantor waives any right to participate in any collateral for the Indebtedness now or hereafter held by Lender.

If now or hereafter (a) Borrower shall be or become insolvent, and (b) the Indebtedness shall not at all times until paid be fully secured by collateral pledged by Borrower, Grantor hereby forever waives and relinquishes in favor of Lender and Borrower, and their respective successors, any claim or right to payment Grantor may now have or hereafter have or acquire against Borrower, by subrogation or otherwise, so that at no time shall Grantor be or become a "creditor" of Borrower within the meaning of 11 U.S.C. section 547(b), or any successor provision of the Federal bankruptcy laws.

GRANTOR'S REPRESENTATIONS AND PROMISES WITH RESPECT TO THE COLLATERAL. With
respect to the Collateral, Grantor represents and promises to Lender that:

Ownership. Grantor is the lawful owner of the Collateral free and clear of all loans, liens, encumbrances, and claims except as disclosed to and accepted by Lender in writing.

Right to Grant Security Interest. Grantor has the full right, power, and authority to enter into this Agreement and to assign the Collateral to Lender.

No Further Transfer. Grantor will not sell, assign, encumber, or otherwise dispose of any of Grantor's rights in the Collateral except as provided in this Agreement.

No Defaults. There are no defaults relating to the Collateral, and there are no offsets or counterclaims to the same. Grantor will strictly and promptly do everything required of Grantor under the terms, conditions, promises, and agreements contained in or relating to the Collateral. ***PAF

Proceeds. Any and all replacement or renewal certificates, instruments, or other benefits or proceeds related to the Collateral that are received by Grantor shall be held by Grantor in trust for Lender and immediately shall be delivered by Grantor to Lender to be held as part of the Collateral.

LENDER'S RIGHTS AND OBLIGATIONS WITH RESPECT TO THE COLLATERAL. While this Agreement is in effect, Lender may retain the rights to possession of the Collateral, together with any and all evidence of the Collateral, such as certificates or passbooks. This Agreement will remain in effect until (a) there no longer is any Indebtedness owing to Lender: (b) all other obligations secured by this Agreement have been fulfilled; and (c) Grantor, in writing, has requested from Lender a release of this Agreement.

EXPENDITURES BY LENDER. If not discharged or paid when due, Lender may (but shall not be obligated to) discharge or pay any amounts required to be discharged or paid by Grantor under this Agreement, including without limitation all taxes, liens, security interests, encumbrances, and other claims, at any time levied or placed on the Collateral. Lender also may (but shall not be obligated to) pay all costs for insuring, maintaining and preserving the Collateral. All such expenditures incurred or paid by Lender for such purposes will then bear interest at the rate charged under the Note from the date incurred or paid by Lender to the date of repayment by Grantor. All Such expenses shall become a part of the Indebtedness and, at Lender's option, will
(a) be payable on demand, (b) be added to the balance of the Note and be apportioned among and be payable with any installment payments to become due during either (i) the term of any applicable insurance policy or (ii) the remaining term of the Note, or (c) be treated as a balloon payment which will be due and payable at the Note's maturity. This Agreement also will secure payment of these amounts. Such right shall be in addition to all other rights and remedies to which Lender may be entitled upon the occurrence of an Event of Default.

LIMITATIONS ON OBLIGATIONS OF LENDER. Lender shall use ordinary reasonable care in the physical preservation and custody of any certificate or passbook for the Collateral but shall have no other obligation to protect the Collateral or its value. In particular, but without limitation, Lender shall have no responsibility (a) for the collection or protection of any income on the Collateral, (b) for the preservation of rights against issuers of the Collateral or against third persons; (C) for ascertaining any maturities, conversions, exchanges, offers, tenders, or similar matters relating to the Collateral; nor
(d) for informing the Grantor about any of the above, whether or not Lender has or is deemed to have knowledge of such matters.

EVENTS OF DEFAULT. Each of the following shall constitute an Event of Default under this Agreement:

Default on Indebtedness. Failure of Borrower to make any payment when due on the Indebtedness.

Other Defaults. Failure of Grantor or Borrower to comply with or to perform any other term, obligation, covenant or condition contained in this Agreement or in any of the Related Documents or failure of Borrower to comply with or to perform any term, obligation, covenant or condition contained in any other agreement between Lender and Borrower.

False Statements. Any warranty, representation or statement made or furnished to Lender by or on behalf of Grantor or Borrower under this Agreement, the Note or the Related Documents is false or misleading in any material respect, either now or at the time made or furnished.


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Defective Collateralization. This Agreement or any of the Related Documents ceases to be in full force and effect (including failure of any collateral documents to create a valid and perfected security interest or lien) at any time and for any reason.

Death or Insolvency. The death of Grantor or Borrower, the insolvency of Grantor or Borrower, the appointment of a receiver for any part of Grantor or Borrower's property, any assignment for the benefit of creditors, any type of creditor workout, or the commencement of any proceeding under any bankruptcy or insolvency laws by or against Grantor or Borrower.

Creditor or Forfeiture Proceedings. Commencement of foreclosure or forfeiture proceedings, whether by judicial proceeding, self-help, repossession or any other method, by any creditor of Grantor or Borrower or by any governmental agency against the Collateral or any other collateral securing the Indebtedness. This includes a garnishment of any of Grantor or Borrower's deposit accounts with Lender. However, this Event of Default shall not apply if there is a good faith dispute by Grantor or Borrower as to the validity or reasonableness of the claim which is the basis of the creditor or forfeiture proceeding and if Grantor or Borrower gives Lender written notice of the creditor or forfeiture proceeding and deposits with Lender monies or a surety bond for the creditor or forfeiture proceeding, in an amount determined by Lender, in its sole discretion, as being an adequate reserve or bond for the dispute.

Events Affecting Guarantor. Any of the preceding events occurs with respect to any Guarantor of any of the Indebtedness or such Guarantor dies or becomes incompetent.

Right to Cure. If any default, other than a Default on Indebtedness, is curable and if Grantor or Borrower has not been given a prior notice of a breach of the same provision of this Agreement, it may be cured (and no Event of Default will have occurred) if Grantor or Borrower, after Lender sends written notice demanding cure of such default, (a) cures the default within fifteen (15) days; or (b), if the cure requires more than fifteen
(15) days, immediately initiates steps which Lender deems in Lender's sole discretion to be sufficient to cure the default and thereafter continues and completes all reasonable and necessary steps sufficient to produce compliance as soon as reasonably practical.

RIGHTS AND REMEDIES ON DEFAULT. Upon the occurrence of an Event of Default, or at any time thereafter, Lender may exercise any one or more of the following rights and remedies, in addition to any rights or remedies that may be available at law, in equity, or otherwise:

Accelerate Indebtedness. Lender may declare all Indebtedness of Borrower to Lender immediately due and payable, without notice of any kind to Grantor or Borrower.

Application of Account Proceeds. Lender may obtain all funds in the Account from the issuer of the Account and apply them to the Indebtedness in the same manner as if the Account had been issued by Lender. If the Account is subject to an early withdrawal penalty, that penalty shall be deducted from the Account before its application to the Indebtedness, whether the Account is with Lender or some other institution. Any excess funds remaining after application of the Account proceeds to the Indebtedness will be paid to Grantor or Borrower as the interests of Grantor or Borrower may appear. Borrower agrees, to the extent permitted by law, to pay any deficiency after application of the proceeds of the Account to the Indebtedness. Lender also shall have all the rights of a secured party under the California Uniform Commercial Code, even if the Account is not otherwise subject to such Code concerning security interests, and the parties to this Agreement agree that the provisions of the Code giving rights to a secured party shall nonetheless be a part of this Agreement.

Collect the Collateral. Lender may collect any of the Collateral and, at Lender's option and to the extent permitted by applicable law, may retain possession of the Collateral while suing on the Indebtedness.

Sell the Collateral. Lender may sell the Collateral, at Lender's discretion, as a unit or in parcels, at one or more public or private sales. Unless the Collateral is perishable or threatens to decline speedily in value, Lender shall give or mail to Grantor or Borrower, or any of them, notice at least ten (10) days in advance of the time and place of public sate, or of the dale after which private sale may be made. Grantor and Borrower agree that any requirement of reasonable notice is satisfied if Lender mails notice by ordinary mail addressed to Grantor or Borrower, or any of them, at the last address Grantor or Borrower has given Lender in writing. If public sale is held, there shall be sufficient compliance with all requirements of notice to the public by a single publication in any newspaper of general circulation in the county where the Collateral is located, setting forth the time and place of sale and a brief description of the property to be sold. Lender may be a purchaser at any public sale.

Register Securities. Lender may register any securities included in the Collateral in Lender's name and exercise any rights normally incident to the ownership of securities.

Sell Securities. Lender may sell any securities included in the Collateral in a manner consistent with applicable federal and state securities laws, notwithstanding any other provision of this or any other agreement. If, because of restrictions under such laws, Lender is or believes it is unable to sell the securities in an open market transaction, Grantor and Borrower agree that (a) Lender shall have no obligation to delay sale until the securities can be registered, (b) Lender may make a private sale to a single person or restricted group of persons, even though such sale may result in a price that is less favorable than might be obtained in an open market transaction, and (c) such a sale shall be considered commercially reasonable. If any securities held as Collateral are "restricted securities" as defined in the Rules of the Securities and Exchange Commission (such as Regulation D or Rule 144) or state securities departments under state "Blue Sky" laws, or if Grantor or Borrower, or any of them (if more than one), is an affiliate of the issuer of the securities, Grantor and Borrower agree that Grantor or Borrower will neither sell nor dispose of any securities of such issuer without obtaining Lender's prior written consent.

Transfer Title. Lender may effect transfer of title upon sale of all or part of the Collateral. For this purpose, Grantor irrevocably appoints Lender as its attorney-in-fact to execute endorsements, assignments and instruments in the name of Grantor and each of them (if more than one) as shall be necessary or reasonable.

Application of Proceeds. Lender may apply any cash which is part of the Collateral, or which is received from the collection or sale of the Collateral, to (a) reimbursement of any expenses, including any costs of any securities registration, commissions incurred in connection with a sale, attorney fees as provided below and court costs, whether or not there is a lawsuit and including any fees on appeal, incurred by Lender in connection with the collection and sale of such Collateral, and (b) to the payment of the Indebtedness of Borrower to Lender, with any excess funds to be paid to Grantor as the interests of Grantor may appear.

Other Rights and Remedies. Lender shall have and may exercise any or all of the rights and remedies of a secured creditor under the provisions of the California Uniform Commercial Code, at law, in equity, or otherwise.

Deficiency Judgment. If permitted by applicable law, Lender may obtain a judgment for any deficiency remaining in the Indebtedness due to Lender after application of all amounts received from the exercise of the rights provided in this section.

Cumulative Remedies. All of Lender's rights and remedies, whether evidenced by this Agreement or by any other writing, shall be cumulative and may be exercised singularly or concurrently. Election by Lender to pursue any remedy shall not exclude pursuit of any other remedy, and an election to make expenditures or to take action to perform an obligation of Grantor or Borrower under this Agreement, after Grantor or Borrower's failure to perform, shall not affect Lender's right to declare a default and to exercise its remedies.

MISCELLANEOUS PROVISIONS. The following miscellaneous provisions are a part of this Agreement:

Amendments. This Agreement, together with any Related Documents, constitutes the entire understanding and agreement of the parties as to the matters set forth in this Agreement. No alteration of or amendment to this Agreement shall be effective unless given in writing and signed by the


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party or parties sought to be charged or bound by the alteration or amendment.

Applicable Law. This Agreement has been delivered to Lender and accepted by Lender in the State of California. If there is a lawsuit, Grantor and Borrower agree upon Lender's request to submit to the jurisdiction of the courts of CONTRA COSTA County, State of California. Subject to the provisions on arbitration, this Agreement shall be governed by and construed in accordance with the laws of the State of California.

Attorneys' Fees; Expenses. Grantor and Borrower agree to pay upon demand all of Lender's costs and expenses, including attorneys' fees and Lender's legal expenses, incurred in connection with the enforcement of this Agreement. Lender may pay someone else to help enforce this Agreement, and Grantor and Borrower shall pay the costs and expenses of such enforcement. Costs and expenses include Lender's attorneys' fees and legal expenses whether or not there is a lawsuit, including attorneys' fees and legal expenses for bankruptcy proceedings (and including efforts to modify or vacate any automatic stay or injunction), appeals, and any anticipated post-judgment collection services. Grantor and Borrower also shall pay all court costs and such additional fees as may be directed by the court.

Notices. All notices required to be given under this Agreement shall be given in writing, may be sent by telefacsimile (unless otherwise required by law), and shall be effective when actually delivered or when deposited with a nationally recognized overnight courier or deposited in the United States mail, first class, postage prepaid, addressed to the party to whom the notice is to be given at the address shown above. Any party may change its address for notices under this Agreement by giving formal written notice to the other parties, specifying that the purpose of the notice is to change the party's address. To the extent permitted by applicable law, if there is more than one Grantor or Borrower, notice to any Grantor or Borrower will constitute notice to all Grantor and Borrowers. For notice purposes, Grantor and Borrower will keep Lender informed at all times of Grantor and Borrower's current address(es).

Power of Attorney. Grantor hereby appoints Lender as its true and lawful attorney-in-fact, irrevocably, with full power of substitution to do the following: (a) to demand, collect, receive, receipt for, sue and recover all sums of money or other property which may now or hereafter become due, owing or payable from the Collateral; (b) to execute, sign and endorse any and all claims, instruments, receipts, checks, drafts or warrants issued in payment for the Collateral; (C) to settle or compromise any and all claims arising under the Collateral, and, in the place and stead of Grantor, to execute and deliver its release and settlement for the claim; and (d) to file any claim or claims or to take any action or institute or take part in any proceedings, either in its own name or in the name of Grantor, or otherwise, which in the discretion of Lender may seem to be necessary or advisable. This power is given as security for the Indebtedness, and the authority hereby conferred is and shall be irrevocable and shall remain in full force and effect until renounced by Lender.

Severability. If a court of competent jurisdiction finds any provision of this Agreement to be invalid or unenforceable as to any person or circumstance, such finding shall not render that provision invalid or unenforceable as to any other persons or circumstances. If feasible, any such offending provision shall be deemed to be modified to be within the limits of enforceability or validity; however, if the offending provision cannot be so modified, it shall be stricken and all other provisions of this Agreement in all other respects shall remain valid and enforceable.

Successor Interests. Subject to the limitations set forth above on transfer of the Collateral, this Agreement shall be binding upon and inure to the benefit of the parties, their successors and assigns.

Waiver. Lender shall not be deemed to have waived any rights under this Agreement unless such waiver is given in writing and signed by Lender. No delay or omission on the part of Lender in exercising any right shall operate as a waiver of such right or any other right. A waiver by Lender of a provision of this Agreement shall not prejudice or constitute a waiver of Lender's right otherwise to demand strict compliance with that provision or any other provision of this Agreement. No prior waiver by Lender, nor any course of dealing between Lender and Grantor, shall constitute a waiver of any of Lender's rights or of any of Grantor's obligations as to any future transactions. Whenever the consent of Lender is required under this Agreement, the granting of such consent by Lender in any instance shall not constitute continuing consent to subsequent instances where such consent is required and in all cases such consent may be granted or withheld in the sole discretion of Lender.

BORROWER AND GRANTOR ACKNOWLEDGE HAVING READ ALL THE PROVISIONS OF THIS ASSIGNMENT OF DEPOSIT ACCOUNT AND AGREE TO ITS TERMS. THIS AGREEMENT IS DATED MARCH 24, 1999.

BORROWER:

/s/ Tim C. Johnson
----------------------------------------------------
TIM C. JOHNSON

GRANTOR:
NATUS MEDICAL, INC.

By: /s/ Bill Lawrenson
   -------------------------------------------------
   BILL LAWRENSON, CHIEF FINANCIAL OFFICER


(E) UNDER NO CIRCUMSTANCE SHALL GRANTOR BE REQUIRED TO PROVIDE ADDITIONAL COLLATERAL BEYOND THE ABOVE ACCOUNT PLUS ACCRUED INTEREST


EXHIBIT 10.9.2

SECURITY AGREEMENT

This Security Agreement (the "Agreement") is made as of March 26, 1999 between Natus Medical Incorporated, a California corporation ("Pledgee"), and Tim Johnson ("Pledgor").

Recitals

Pledgor has obtained a $250,000 line of credit from Scott Valley Bank (the "Bank") evidenced by a promissory note dated March 26, 1999 from the Pledgor to the Bank (the "Note"). The Note requires that Pledgee pledge and deliver to bank collateral sufficient to fully secure the Note under an agreement dated March 26, 1999 (the "Guarantee") in the form of a certificate of deposit of $250,000. Pursuant to Pledgor's election to exercise options to purchase shares of Common Stock of Pledgee, Pledgor has purchased 277,778 shares of Pledgee's Common Stock (the "Shares"). The Note and the Guarantee, as well as each of the Pledgor and Pledgee's obligations thereunder are as set forth in Exhibits 1A and 1B to this Agreement. The Pledgee desires to retain the services of the Pledgor and Pledgor desires to continue to provide such services.

NOW, THEREFORE, it is agreed as follows:

1. Creation and Description of Security Interest. In consideration of the execution of the Guarantee to the Note, Pledgor, pursuant to the Commercial Code of the State of California, the terms and conditions of this Agreement and the Joint Escrow Instructions attached hereto as Exhibit 2 (the "Instructions"), hereby pledges all of such Shares (herein sometimes referred to as the "Collateral") represented by certificate numbers listed on Exhibit 4, duly endorsed in blank or with executed stock powers attached hereto as Exhibit 3, and herewith delivers said certificates to the Assistant Secretary of Pledgee ("Pledgeholder"), who shall hold said certificates subject to the Instructions.

The pledged stock (together with an executed blank stock assignment for use in transferring all or a portion of the Shares to Pledgee if, as and when required pursuant to this Agreement) shall be held by the Pledgeholder as security for the repayment of the Note, and any extensions or renewals thereof, to be executed by Pledgor pursuant to the terms of the Agreement, and the Pledgeholder shall not encumber or dispose of such Shares except in accordance with the provisions of this Agreement. The Pledgor and Pledgee agree that the sole obligation of Pledgor in the event the bank seizes the collateral pledged by Pledgee shall be the Shares, that the Pledgee shall have no recourse against the Pledgor other than the Shares and that after such a seizure of the collateral, the Shares shall be retained in full satisfaction of Pledgor's obligation to Pledgee.

2. Pledgor's Representations and Covenants. To induce Pledgee to enter into this Agreement, Pledgor represents and covenants to Pledgee, its successors and assigns, as follows:

(a) Payment Of Indebtedness. Pledgor will pay the principal sum of the Note, together with interest thereon, at the time and in the manner provided in the Note.

(b) Encumbrances. The Shares are free of all other encumbrances, defenses and liens, and Pledgor will not further encumber the Shares without the prior written consent of Pledgee.

(c) Margin Regulations. In the event that Pledgee's Common Stock is now or later becomes margin-listed by the Board of Governors of the Federal Reserve System and Pledgee is classified as a "lender" within the meaning of the regulations under Part 207 of Title 12 of the Code of Federal Regulations ("Regulation G"), Pledgor agrees to cooperate with Pledgee in making any amendments to the Note, the Guarantee or other related documentation or providing any additional collateral as may be necessary to comply with such regulations.

3. Voting Rights. During the term of this pledge and so long as all payments of principal and interest are made as they become due under the terms of the Note, Pledgor shall have the right to vote all of the Shares pledged hereunder.

4. Stock Adjustments. In the event that during the term of the pledge any stock dividend, reclassification, readjustment or other changes are declared or made in the capital structure of Pledgee, all new, substituted and additional shares or other securities issued by reason of any such change shall be delivered to and held by the Pledgeholder under the terms of this Security Agreement in the same manner as the Shares originally pledged hereunder. In the event of substitution of such securities. Pledgor, Pledgee and Pledgeholder shall cooperate and execute such documents as are reasonable so as to provide for the substitution of such Collateral and, upon such substitution, references to "Shares" in this Security Agreement shall include the substituted shares of capital stock of Pledgor as a result thereof.

5. Options and Rights. In the event that, during the term of this pledge, subscription options or other rights or options shall be issued in connection with the pledged Shares, such rights, or options shall be the property of Pledgor and, if exercised by Pledgor, all new stock or other securities so acquired by Pledgor as it relates to the pledged Shares then held by Pledgeholder shall be immediately delivered to Pledgeholder, to be held under the terms of this Agreement in the same manner as the Shares pledged.

6. Termination of Employment. In the event that the Pledgor shall cease to be an employee or consultant for the Pledgeholder for any reason, then Pledgor shall, at the option of the Pledgeholder, repay the whole unpaid balance of principal and accrued interest on the Note to the Bank or shall otherwise arrange for complete release of Pledgeholder's guarantee and collateral with bank no later than 18 months after termination of the Pledgor's employment or consultancy with the Pledgeholder.

7. Default. Pledgor shall be deemed to be in default of this Agreement in the event:

(a) Payment of principal or interest on the Note shall be delinquent for a period of 10 days or more and the Bank has seized collateral pledged by Pledgee under its Guarantee of the Note; or

(b) Pledgor fails to perform any of the covenants set forth in the Note or contained in this Agreement for a period of 10 days after written notice thereof from Pledgee, or


(c) Pledgor, fails to retire the Note in accordance with section 6 above.

8. Release of Collateral. Subject to any applicable contrary rules under Regulation G, there shall be released from this pledge a portion of the pledged Shares held by Pledgeholder hereunder upon payments of the principal of the Note. The number of the pledged Shares which shall be released shall be that number of full Shares which bears the same proportion to the initial number of Shares pledged hereunder as the payment of principal bears to the initial full principal amount of the Note. A portion of the Shares may be released for sale to a third party upon the consent of the Pledgor, which consent shall not be unreasonably withheld. Of the proceeds of such sale, at least one half must be used to pay any principal or interest outstanding on the Note and the remainder of such proceeds may be released to the Pledgor; provided, however, that if after such sale and net of the proceeds applied to the Note, the fair market value of the remaining Shares would be less than the then outstanding principal and interest due on the Note, no portion of the proceeds shall be released to the Pledgor.

9. Withdrawal or Substitution of Collateral. Pledgor shall not sell, withdraw, pledge, substitute or otherwise dispose of all or any part of the Collateral without the prior written consent of Pledgee.

10. Term. The within pledge of Shares shall continue until the payment of

all indebtedness secured by the Pledgee's Guarantee, at which time the remaining pledged stock shall be promptly delivered to Pledgor, subject to the provisions for prior release of a portion of the Collateral as provided in paragraph 7 above.

11. Insolvency. Pledgor agrees that if a bankruptcy or insolvency proceeding is instituted by or against him, if a receiver is appointed for the property of Pledgor or if Pledgor makes an assignment for the benefit of creditors, Pledgee may proceed as provided in the case of default.

12. Pledgeholder Liability. In the absence of willful or gross negligence, Pledgee shall not be liable to any party for any of his acts, or omissions to act, as Pledgeholder pursuant to the Joint Escrow Instructions attached hereto as Exhibit 2.

13. Invalidity of Particular Provisions. Pledgor and Pledgee agree that the enforceability or invalidity of any provision or provisions of this Agreement shall not render any other provision or provisions herein contained unenforceable or invalid.

14. Successors or Assigns. Pledgor and Pledgee agree that all of the terms of this Agreement shall be binding on their respective successors and assigns, and that the term "Pledgor" and the term "Pledgee" as used herein shall be deemed to include, for all purposes, the respective designees, successors, assigns, heirs, executors and administrators.

15. Governing Law. This Agreement shall be interpreted and governed under the internal substantive laws, but not the choice of law rules, of California.

IN WITNESS WHEREOF, the parties hereto have executed this Agreement as of the day and year first above written.

"PLEDGOR"                        /s/ Tim C. Johnson
                                 -----------------------------------------
                                 Signature

Tim C. Johnson
Print Name

Address:


"PLEDGEE"                        NATUS MEDICAL INCORPORATED
                                 a California corporation

                                           /s/ [Illlegible]
                                 -----------------------------------------
                                 By:

                                                 CFO
                                 -----------------------------------------
                                 Title:


EXHIBIT 2

JOINT ESCROW INSTRUCTIONS

March 26, 1999

Assistant Secretary
1501 Industrial Road
San Carlos, California 94070

Dear Sir:

As Escrow Agent for both Natus Medical Incorporated, a California corporation (the "Company"), and the undersigned pledgor of stock of the Company (the "Pledgor"), you are hereby authorized and directed to hold the documents delivered to you pursuant to the terms of that certain Security Agreement (the "Agreement") between the Company and the undersigned, to which a copy of these Joint Escrow Instructions is attached as Exhibit 2, in accordance with the following instructions:

1. In the event the Company and/or any assignee of the Company (referred to collectively for convenience herein as the "Company") defaults on all or a portion of the promissory note attached to the Agreement as Exhibit 1A (the "Note") and the Bank, as the holder of the Note, has seized certain collateral pledged by the Company under an agreement with the holder of the Note ("the "Guarantee"), attached as Exhibit 1B, the Company shall give to Pledgor and you a written notice specifying the number of shares of stock to retained by the Company in satisfaction of Pledgor's obligation to the Company. Pledgor and the Company hereby irrevocably authorize and direct you to close the transaction contemplated by such notice in accordance with the terms of the notice.

2. At the closing, you are directed (a) to date the stock assignments necessary for the transfer in question, (b) to fill in the number of shares being transferred, and (c) to deliver the same, together with the certificate evidencing the shares of stock to be transferred, to the Company or its assignee, in accordance with the Agreement, against the simultaneous delivery to you of the canceled Note and release of security obligation as to the transferred shares.

3. Pledgor irrevocably authorizes the Company to deposit with you any certificates evidencing shares of stock to be held by you hereunder and any additions and substitutions to the shares as defined in the Agreement. Pledgor does hereby irrevocably constitute and appoint you as his attorney-in-fact and agent for the term of this escrow to execute with respect to such securities all documents necessary or appropriate to make such securities negotiable and to complete any transaction herein contemplated. Subject to the provisions of this paragraph 3, Pledgor shall exercise all rights and privileges of a stockholder of the Company while the stock is held by you.


4. Upon written request of Pledgor, but no more than once each year, unless the Note is in default, you will deliver to Pledgor a certificate or certificates representing so many shares of stock the fair market value of which is greater than the principal and interest due upon the Note as of the date thereof. Within eighteen months after cessation of Pledgor's Continuous Status as an Employee by the Company, you will deliver to Pledgor a certificate or certificates representing the aggregate number of Shares subject to the Agreement and not required as collateral for the Note due to the satisfaction of the Note in full by the Pledgor with cash.

Notwithstanding the foregoing, none of the certificates representing the Shares deposited under these escrow instructions shall be released to the Pledgor if the principal and interest due under Pledgor's Note given in payment for such shares exceeds the fair market value of the Shares subject to the Agreement. So long as the Note is outstanding, the shares shall be held by you as collateral for the obligation under the Note. Upon the request of the Pledgor and the written consent of the Pledgee, you may sell some or all of the Shares and provide no less than one half of the proceeds to the Bank as payment for the Note and the balance to the Pledgor; provided, however, that if after such sale and net of the proceeds applied to the Note, the fair market value of the remaining Shares would be less than the then outstanding principal and interest due on the Note, no portion of the proceeds shall be released to the Pledgor. Subject to the provisions of this paragraph 4, upon payment of the Note in full the remaining certificates representing the shares may be released and delivered to the Pledgor. In the event Pledgor defaults in payment of the Note when due, you shall, upon written request of the Company, deliver the certificate evidencing the shares and the stock assignments to the Company to enable the Company to exercise its rights as a secured party under the Commercial Code of the State of California.

5. Your duties hereunder may be altered, amended, modified or revoked only by a writing signed by all of the parties hereto.

6. You shall be obligated only for the performance of such duties as are specifically set forth herein and may rely and shall be protected in relying or refraining from acting on any instrument reasonably believed by you to be genuine and to have been signed or presented by the proper party or parties. You shall not be personally liable for any act you may do or omit to do hereunder as Escrow Agent or as attorney-in-fact for Pledgor while acting in good faith, and any act done or omitted by you pursuant to the advice of your own attorneys shall be conclusive evidence of such good faith.

7. You are hereby expressly authorized to disregard any and all warnings given by any of the parties hereto or by any other person or corporation and are hereby expressly authorized to comply with and obey orders, judgments or decrees of any duly approved arbitrator or court of competent jurisdiction. In case you obey or comply with any such order, judgment or decree, you shall not be liable to any of the parties hereto or to any other person, firm or corporation by reason of such compliance, notwithstanding any such order, judgment or decree being subsequently reversed, modified, annulled, set aside, vacated or found to have been entered without jurisdiction.

8. You shall not be liable in any respect on account of the identity, authorities or rights of the parties executing or delivering or purporting to execute or deliver the Agreement or any documents or papers deposited or called for hereunder.


9. You shall not be liable for the outlawing of any rights under any applicable statute of limitations with respect to these Joint Escrow Instructions or any documents deposited with you.

10. You shall be entitled to employ such legal counsel and other experts as you may deem necessary properly to advise you in connection with your obligations hereunder, may rely upon the advice of such counsel, and may pay such counsel reasonable compensation therefor.

11. Your responsibilities as Escrow Agent hereunder shall terminate if you shall cease to be the counsel to the Company or its Assistant Secretary or if you shall resign by written notice to each party. In the event of any such termination, the Company shall appoint a successor Escrow Agent.

12. If you reasonably require other or further instruments in connection with these Joint Escrow Instructions or obligations in respect hereto, the necessary parties hereto shall join in furnishing such instruments.

13. It is understood and agreed that should any dispute arise with respect to the delivery and/or ownership or right of possession of the securities held by you hereunder, you are authorized and directed to retain in your possession without liability to anyone all or any part of said securities until such disputes shall have been settled either by mutual written agreement of the parties concerned or by a final order, decree or judgment of a duly appointed arbitrator or court of competent jurisdiction after the time for appeal has expired and no appeal has been perfected, but you shall be under no duty whatsoever to institute or defend any such proceedings.

14. At the option of either the Company or Pledgor, any and all disputes or controversies arising from or respecting this agreement shall be decided by binding arbitration under the rules of the American Arbitration Association. The arbitrator shall consist of one arbitrator. Arbitration shall take place in Santa Mateo County, California or any other location mutually agreeable to the parties. At the request of either party, arbitration proceedings will be conducted in the utmost secrecy. The arbitrator shall be able to decree any and all relief of an equitable nature and to award damages, with or without an accounting and costs. The decree of judgment of an award rendered by the arbitrator may be entered in any court of competent jurisdiction.

15. Any notice required or permitted hereunder shall be given in writing and shall be deemed effectively given when delivered, if given by personal delivery: three (3) business days after the business day of deposit in the United States Post Office, by registered or certified mail with postage and fees prepaid; one (1) business day after the business day of facsimile transmission, if a confirmation copy is sent via first class mail, postage prepaid; or one (1) business day after the business day of deposit with Federal Express or similar overnight carrier, freight prepaid; in any such case addressed to each of the other parties thereunto entitled at the addresses indicated in the Company's records, or at such other addresses as a party may designate by ten days' advance written notice to each of the other parties hereto.


16. By signing these Joint Escrow Instructions, you become a party hereto only for the purpose of said Joint Escrow Instructions; you do not become a party to the Agreement.

17. This instrument shall be binding upon and inure to the benefit of the parties hereto, and their respective successors and permitted assigns.

Very truly yours,

COMPANY:

NATUS MEDICAL INCORPORATED
a California corporation

By:  /s/ William Lawrenson
   -------------------------

Title:      CFO

PLEDGOR:

/s/ Tim C. Johnson
----------------------------
Tim C. Johnson

ESCROW AGENT:


Assistant Secretary

Natus Medical Incorporated


EXHIBIT 10.10

For Purchases and Leases Direct From Supplier
Subject to Competitive Bid Process

CAPITAL EQUIPMENT SUPPLIER AGREEMENT

between

NOVATION, LLC

and

NATUS MEDICAL INC.

Confidential treatment has been requested for portions of this exhibit. The copy filed herewith omits the information subject to the confidentiality request. Omissions are designated as *****. A complete version of this exhibit has been filed separately with the Securities and Exchange Commission.


TABLE OF CONTENTS

                                                                            PAGE
                                                                            ----


1.   Introduction.........................................................    1
     a.   Purchasing and Leasing Opportunities for Members................    1
     b.   Supplier........................................................    1
     c.   Bid.............................................................    1

2.   Contract Award.......................................................    1
     a.   Letter of Award ................................................    1
     b.   Optional Purchasing or Leasing Arrangements.....................    2
     c.   [***] Terms.....................................................    2
     d.   Changes in Award Prices.........................................    2
     e.   Notification of Changes in Pricing Terms........................    2
     f.   Underutilized Businesses........................................    2

3.   Term and Termination.................................................    3
     a.   Term............................................................    3
     b.   Termination by Novation.........................................    3
     c.   Termination by Supplier.........................................    3

4.   Product Supply.......................................................    3
     a.   Delivery and Invoicing..........................................    3
     b.   Supplies........................................................    4
     c.   Product Fill Rates; Confirmation and Delivery Times.............    4
     d.   Manuals/Schematics/Inspection Procedures........................    4
     e.   Bundled Terms...................................................    4
     f.   Discontinuation of Products; Changes in Packaging...............    4
     g.   Replacement or New Products.....................................    5
     h.   New Technology..................................................    5
     i.   Product Acceptance..............................................    5
     j.   Site Preparation................................................    6
     k.   Installation/Assembly...........................................    6
     l.   Installation/Environmental Issues...............................    6
     m.   Member Services.................................................    6
     n.   Training........................................................    6
     o.   Product Deletion................................................    7
     p.   Return of Products..............................................    7
     q.   Failure to Supply...............................................    7

5.   Product Quality......................................................    7
     a.   Free From Defects...............................................    7
     b.   Warranty Service................................................    8
     c.   Replacement Parts...............................................    8
     d.   Service Response Time...........................................    8
     e.   Uptime Guarantee................................................    8


[***] Confidential treatment requested pursuant to a request for confidential treatment filed with the Securities and Exchange Commission. Omitted portions have been filed separately with the Commission.

-i-

     f.   Preventive Maintenance..........................................    9
     g.   Upgrades........................................................    9
     h.   Customization Software..........................................    9
     i.   Operational Software............................................    9
     j.   Diagnostic Software.............................................   10
     k.   Data Conversion/Interfaces......................................   10
     l.   Service Contract Cancellation...................................   10
     m.   Product Compliance..............................................   10
     n.   Patent Infringement.............................................   11
     o.   Product Condition...............................................   11
     p.   Recall of Products..............................................   11
     q.   Shelf Life......................................................   11

6.   Century Compliance...................................................   11
     a.   Definitions.....................................................   11
     b.   Representations.................................................   12
     c.   Remedies........................................................   12
     d.   Noncompliance Notice............................................   12
     e.   Survival........................................................   13

7.   Reports and Other Information Requirements...........................   13
     a.   Report Content..................................................   13
     b.   Report Format and Delivery......................................   13
     c.   Other Information Requirements..................................   14

8.   Obligations of Novation..............................................   14
     a.   Information to Members..........................................   14
     b.   Marketing Services..............................................   14

9.   Marketing Fees.......................................................   14
     a.   Calculation.....................................................   14
     b.   Payment.........................................................   15

10.  [***]................................................................   15

11.  Nonpayment or Insolvency of a Member.................................   16

12.  Insurance............................................................   16
     a.   Policy Requirements.............................................   16
     b.   Self-Insurance..................................................   16
     c.   Amendments, Notices and Endorsements............................   17

13.  Compliance with Law and Government Program Participation.............   17
     a.   Compliance With Law.............................................   17
     b.   Government Program Participation................................   17

14.  Release and Indemnity................................................   17

15.  Books and Records; Facilities Inspections............................   18

16.  Use of Names Etc.....................................................   18


[***] Confidential treatment requested pursuant to a request for confidential treatment filed with the Securities and Exchange Commission. Omitted portions have been filed separately with the Commission.

ii

17.  Confidential Information.............................................   18
     a.   Nondisclosure...................................................   18
     b.   Definition......................................................   19

18.  Miscellaneous........................................................   19
     a.   Choice of Law...................................................   19
     b.   Not Responsible.................................................   19
     c.   Third Party Beneficiaries.......................................   19
     d.   Notices.........................................................   19
     e.   No Assignment...................................................   20
     f.   Severability....................................................   20
     g.   Entire Agreement................................................   20

-iii-

INDEX OF DEFINED TERMS

                                                                 PAGE
                                                                 ----
Agreed Percentage...............................................   15
Award Letter....................................................    1
Award Prices....................................................    1
Bid.............................................................    1
Calendar-Related................................................   12
Century Noncompliance...........................................   12
Clients.........................................................    1
Confidential Information........................................   19
Effective Date..................................................    3
Equipment.......................................................    1
FDA.............................................................   17
Federal health care program.....................................   17
Forms...........................................................    1
Gregorian calendar..............................................   12
Guidebook.......................................................   14
Indemnitees.....................................................   17
Legal Requirements..............................................   17
Marketing Fees..................................................   14
Members.........................................................    1
Non-Price Specifications........................................    1
Novation........................................................    1
Novation Database...............................................    1
Products........................................................    1
Reporting Month.................................................   13
Services........................................................    1
Special Conditions..............................................    1
Supplier...................................................title page
Supplies........................................................    1
Systems.........................................................   12
Term............................................................    3
timely..........................................................   13
Warranty Period.................................................    7

-iv-

NOVATION, LLC

CAPITAL EQUIPMENT SUPPLIER AGREEMENT

1. Introduction.

a. Purchasing and Leasing Opportunities for Members. Novation, LLC ("Novation") is engaged in providing purchasing and leasing opportunities with respect to high quality products and services to participating health care providers ("Members"). Members are entitled to participate in Novation's programs through their membership or other participatory status in any of the following client organizations: VHA Inc., University HealthSystem Consortium, and HealthCare Purchasing Partners International, LLC (collectively, "Clients"). Novation is acting as the exclusive agent for each of the Clients and certain of each Client's subsidiaries and affiliates, respectively (and not collectively), with respect to this Agreement. A current listing of Members is maintained by Novation in the electronic database described in the Guidebook referred to in Subsection 7.c below ("Novation Database"). A provider will become a "Member" for purposes of this Agreement at the time Novation adds the provider to the Novation Database and will cease to be a "Member" for such purposes at the time Novation deletes the provider from the Novation Database.

b. Supplier. Supplier is the manufacturer of the equipment ("Equipment"), and/or parts and supplies (collectively, "Supplies"), and/or the provider of services ("Services"), all as listed on Exhibit A. (The Equipment, Supplies and/or Services are collectively referred to herein as "Products").

c. Bid. Supplier has responded to Novation's Invitation to Bid by

submitting its written offer ("Bid") to Novation consisting of this Agreement, the listing of Products and the pricing, financing and/or lease terms therefor (collectively, "Award Prices") attached hereto as Exhibit A, the other specifications attached hereto as Exhibit B ("Non-Price Specifications"), the Special Conditions attached hereto as Exhibit C ("Special Conditions"), and any other materials required to be submitted in accordance with the Bid Instructions.

2. Contract Award.

a. Letter of Award. By executing and delivering the Letter of Award attached hereto as Exhibit D ("Award Letter") to Supplier, Novation will have accepted the Bid, and Novation and Supplier therefore agree that Supplier will make the Products available for purchase and/or lease by the Members at the Award Prices in accordance with the terms of this Agreement and the forms of purchase, lease, license, financing or servicing agreements, if any, attached hereto as Exhibit E (collectively, "Forms"); provided, however, that Novation's award of this Agreement to Supplier will not constitute a commitment by any person to purchase or lease any of the Products. No obligations of Novation set forth in this Agreement will be valid or enforceable against Novation unless and until the Award Letter has been duly executed by Novation and attached as an exhibit hereto. Supplier acknowledges that, in making its award to Supplier, Novation has materially relied on all representations, warranties and agreements made

by Supplier as part of the Bid and that all such representations, warranties and agreements will survive acceptance of the Bid.

b. Optional Purchasing or Leasing Arrangements. Novation and Supplier agree that each Member will have the option of purchasing or leasing the Products under the terms of this Agreement and the Forms or under the terms of any other purchasing, pricing, leasing, licensing or financing arrangement that may exist between such Member and Supplier at any time during the Term; provided, however, that, regardless of the arrangement. Supplier will comply with Sections 7 and 9 below. If any Member uses any other purchasing, pricing, leasing, licensing or financing arrangement with Supplier when ordering products covered by any contract between Supplier and Novation, Supplier will notify such Member of the pricing and other significant terms of the applicable Novation contract.

c. [***] Terms. Supplier agrees that the [***] and [***] of [***] purchased or leased under this Agreement [***] during the [***]. Supplier agrees to [***] to Novation of [***] for the [***] or [***] of the Products
[***] during [***] on [***] to [***] the [***] of [***]. Supplier [***] the
[***] or [***] to the [***] of the Products [***] to [***]. If [***] receives
[***] from [***] that [***] or [***] are [***] written [***] of [***] to
[***], and [***] will, [***] business days [***] and [***] days for [***], advise [***] in [***] of and [***] to [***].

d. Changes in Award Prices. Unless otherwise expressly agreed in any exhibit to this Agreement, the [***] will not [***] and [***] will [***] or
[***] during [***]. In addition to [***] made [***], Supplier may lower the Award Prices or increase any discount applicable to the purchase or lease of the Products at any time.

e. Notification of Changes in Pricing Terms. Supplier will provide not less than [***] prior written notice to Novation and not less than [***] prior written notice to all Members of any change in pricing terms permitted or required by this Agreement. For purposes of the foregoing notification requirements, a change in pricing terms will mean any change that affects the delivered price to the Member, including, without limitation, changes in list prices, discounts or pricing tiers or schedules. Such prior written notice will be provided in such format and in such detail as may be required by Novation from time to time, and will include, at a minimum, sufficient information to determine line item pricing of the Products for all affected Members.

f. Underutilized Businesses. Certain Members may be required by law, regulation and/or internal policy to do business with underutilized businesses such as Minority Business Enterprises (MBE), Disadvantaged Business Enterprises (DBE), Small Business Enterprises


[***] Confidential treatment requested pursuant to a request for confidential treatment filed with the Securities and Exchange Commission. Omitted portions have been filed separately with the Commission.

-2-

(SBE), Historically Underutilized Businesses (HUB) and/or Women-owned Business Enterprises (WBE). To assist Novation in helping Members meet these requirements. Supplier will comply with all Novation policies and programs with respect to such businesses and will provide, on request, Novation or any Member with statistical or other information with respect to Supplier's utilization of such businesses as a vendor, distributor, contractor or subcontractor.

3. Term and Termination.

a. Term. This Agreement will be effective as of the effective date set

forth in the Award Letter ("Effective Date"), and, unless sooner terminated, will continue in full force and effect for the initial term set forth in the Non-Price Specifications and for any renewal terms set forth in the Non-Price Specifications by Novation's delivery of written notice of renewal to Supplier not less than ten (10) days prior to the end of the initial term or any renewal term, as applicable. The initial term, together with the renewal terms, if any, are collectively referred to herein as the "Term."

b. Termination by Novation. Novation may terminate this Agreement at any time for any reason whatsoever by delivering not less than [***] prior written notice thereof to Supplier. In addition, Novation may terminate this Agreement immediately by delivering written notice thereof to Supplier upon the occurrence of either of the following events:

(1) Supplier breaches this Agreement; or

(2) Supplier becomes bankrupt or insolvent or makes an unauthorized assignment or goes into liquidation or proceedings are initiated for the purpose of having a receiving order or winding up order made against Supplier, or Supplier applies to the courts for protection from its creditors.

Novation's right to terminate this Agreement due to Supplier's breach in accordance with this Subsection is in addition to any other rights and remedies Novation, the Clients or the Members may have resulting from such breach, including, but not limited to, Novation's and the Clients' right to recover all loss of Marketing Fees resulting from such breach through the date of termination and for [***] thereafter.

c. Termination by Supplier. Supplier may terminate this Agreement at any time for any reason whatsoever by delivering not less than [***] prior written notice thereof to Novation.

4. Product Supply.

a. Delivery and Invoicing. Supplier agrees to deliver Products ordered by the Members to the Members, [***], and will direct its invoices to the Members in accordance with this Agreement. Supplier agrees to prepay and absorb charges, if any, for transporting Products to the Members. Exhibit F attached hereto sets forth a delivery schedule


[***] Confidential treatment requested pursuant to a request for confidential treatment filed with the Securities and Exchange Commission. Omitted portions have been filed separately with the Commission.

-3-

constituting the minimum delivery lead times for the Equipment from the date of a Member's purchase order. The actual delivery lead times may be increased by the ordering Member based on its needs. Exhibit G attached hereto sets forth the amount of liquidated damages payable by Supplier to the Member in the event of Supplier's failure for any reason to comply with the agreed delivery schedule. Supplier will make whatever arrangements are reasonably necessary with the Members to implement the terms of this Agreement; provided, however, Supplier will not impose any purchasing or leasing commitment on any Member as a condition to the Member's purchase or lease of any Products pursuant to this Agreement.

b. Supplies. Supplies necessary for the operation of the Equipment will be made available by Supplier to the Members at the prices or discounts listed on Exhibit A. All warranties and guarantees will remain in force regardless of the source from which the Member purchases Supplies.

c. Product Fill Rates; Confirmation and Delivery Times. Supplier agrees to provide product fill rates to the Members for Supplies of greater than [***], calculated as line item orders. Supplier will provide confirmation of orders Supplies from the Members via the electronic data interchange described in the Guidebook referred to in Subsection 7.c below within [***] business days after placement of the order and will deliver the Supplies to the Members within
[***] business days after placement of the order.

d. Manuals/Schematics/Inspection Procedures. Supplier will provide to the Members two complete and unabridged sets of operator service manuals for each model of Equipment purchased or leased, including all subassemblies and peripheral devices (including those manufactured by others). The technical service manuals furnished to the Members will be at least as complete and comprehensive as those furnished to Supplier's technical service personnel and at a minimum must include theory of operation (including software), electrical and mechanical schematics, preventive maintenance procedure and schedules, replacement parts lists, and troubleshooting documentation. All updates to such manuals will be provided to the applicable Members within two (2) weeks after the release of such updates.

e. Bundled Terms. Supplier agrees to give Novation prior written notice of any offer Supplier makes to any Member to sell or lease products that are not covered by this Agreement in conjunction with Products covered by this Agreement under circumstances where the Member has no real economic choice other than to accept such bundled terms.

f. Discontinuation of Products: Changes in Packaging. Supplier will have no unilateral right to discontinue any of the Products or to make any changes in packaging which render any of the Products substantially different in use, function or distribution. Supplier may request Novation in writing to agree to a proposed discontinuation of any Products or a proposed substantial change in packaging for any Products at least [***] days prior to the proposed implementation of the discontinuation or change. Under no circumstances will any Product discontinuation or substantial packaging changes be permitted under this Agreement without Novation's agreement to the discontinuation or substantial change. In the event Supplier implements such proposed discontinuation or substantial change without Novation's agreement


[***] Confidential treatment requested pursuant to a request for confidential treatment filed with the Securities and Exchange Commission. Omitted portions have been filed separately with the Commission.

-4-

thereto in writing, in addition to any other rights and remedies Novation or the Members may have by reason of such discontinuation or substantial change, (i) Novation will have the right to terminate any or all of the Product(s) subject to such discontinuation or substantial change or to terminate this Agreement in its entirety immediately upon becoming aware of the discontinuation or substantial change or any time thereafter by delivering written notice thereof to Supplier: (ii) the Members may purchase or lease products equivalent to the discontinued or substantially changed Products from other sources and Supplier will be liable to the Members for all reasonable costs in excess of the Award Prices plus any other damages which they may incur: and (iii) Supplier--will be liable to Novation and the Clients for any loss of Marketing Fees resulting from such unacceptable discontinuation or substantial change plus any other damages which they may incur.

g. Replacement or New Products. Supplier will have no unilateral right to replace any of the Products listed in Exhibit A with other products or to add new products to this Agreement. Supplier may request Novation in writing to agree to a replacement of any of the Products or the addition of a new product that is closely related by function or use to an existing Product at least sixty
(60) days prior to the proposed implementation of the replacement or to the new product introduction. Under no circumstances will any Product replacement or new product addition to this Agreement be permitted without Novation's agreement to the replacement or new product.

h. New Technology. During the Term, Supplier will disclose to Novation new technology developed by Supplier which provides the same function as the Equipment or any component thereof. Upon introduction of the new technology by Supplier, each Member will be provided the option to exchange any Equipment or component purchased, leased or ordered hereunder for the new technology upon the terms and conditions set forth in Exhibit H attached hereto.

i. Product Acceptance. A period of sixty (60) days from the first operational use will be given to the Members for the purpose of acceptance testing of the Equipment. Upon completion of the installation, the Equipment will meet or exceed the specifications set out in Exhibit B and the specifications set forth in Supplier's published brochures. Acceptance testing will include, but is not limited to, safety testing, calibration, performance testing, documentation inspection and testing for adherence to specifications. Formal acceptance and invoice payment will occur only after the results of the foregoing tests have been verified by the Member with at least thirty (30) days of operational use, but not later than sixty (60) days from the first operational use, at the Member's discretion. A complete set of all test documentation and procedures will be made available to the Member prior to final acceptance. As a condition for the acceptance of the Equipment, the Equipment must have achieved uptime of at least [***] over the thirty (30) day period immediately preceding acceptance, with uptime calculated in accordance with Subsection 5.e below. If the Equipment fails the acceptance testing, the Member may, at its discretion, return the Equipment to the Supplier for a complete cash refund/exchange. If the Equipment passes the acceptance testing, the Warranty Period for the Equipment will begin sixty (60) days from the first operational use.


[***] Confidential treatment requested pursuant to a request for confidential treatment filed with the Securities and Exchange Commission. Omitted portions have been filed separately with the Commission.

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j. Site Preparation. A general description of the pre-installation and site preparation services (including, but not limited to, drawings, specifications or other materials necessary for site preparation) provided by Supplier together with a general description of site preparation costs for which the Members will be responsible is set forth in Exhibit I attached hereto. Supplier will provide the Members with a more specific description of pre-installation planning and site preparation services and site preparation costs at the time the Member requests a quote from Supplier.

k. Installation/Assembly. A general description of the installation and/or assembly requirements for the Equipment is set forth in Exhibit J attached hereto, including an estimate of any additional costs involved. At the time the Member requests a quote from Supplier, Supplier will provide a more detailed description of the installation and/or assembly requirements, including, but not limited to, electrical, mechanical (HVAC), structural (including seismic where applicable), and plumbing requirements. Based on past installations and a review of the Member's site, Supplier will provide an estimate of the cost that the Member will bear for each component of the installation and/or assembly, regardless if supplied by Supplier or the Member. The Member will specify whether Supplier or the Member will be responsible for the installation and/or assembly. If Supplier is specified as having responsibility for the installation and/or assembly, Supplier will include estimated dates and times for installation and/or assembly as part of the agreed delivery schedule referred to in Subsection 4.a above. If the Member will be taking the responsibility for installation and/or assembly, Supplier will contact the individual selected by the Member that will be responsible for the installation and/or assembly of the Equipment.

l. Installation/Environmental Issues. Supplier will bear all costs associated with the removal of packaging, crating and other material associated with the installation of the Equipment. Supplier, at the discretion of the Member, will remove the retired equipment at Supplier's expense, including any expenses associated with the proper disposal of hazardous or other wastes.

m. Member Services. Supplier will consult with each Member to identify the Member's policies relating to access to facilities and personnel. Supplier will comply with such policies and will establish a specific timetable for sales calls by sales representatives and, if applicable, service calls by service representatives, to satisfy the needs of the Member. Supplier will promptly respond to Members' reasonable requests for verification of purchase or leasing history.

n. Training. A description and schedule of the technical service training offered by Supplier is attached hereto as Exhibit K. Supplier will, unless otherwise provided in any exhibit hereto, at no cost for tuition, travel, lodging or out of pocket expenses to the Member, allow a minimum of two (2) of the Member's staff members to attend Supplier's technical service training school. Supplier will also allow the Member to reproduce all training material for use by the Member's personnel at the Member's facility. Failure to provide the opportunity for at least two (2) of the Member's staff to complete Supplier's technical service training school prior to the expiration of the Warranty Period will cause the warranty to be extended until the end of a thirty
(30) day period after the training has been completed. In addition, Supplier will provide

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inservice training for both operators and technical service staff of the Member at the Member's site at Supplier's own cost, unless otherwise provided in any exhibit hereto, for the Equipment as requested by any Member prior to the completion of the [***] acceptance period referenced in Subsection 4.i above and will continue such inservice training for the period required by the Member to complete training for the required personnel. Supplier will provide follow-up inservice training as determined by the Member for the life of the Equipment at no additional charge regardless of where the training is performed.

o. Product Deletion. Notwithstanding anything to the contrary contained in this Agreement, Novation may delete any one or more of the Products from this Agreement at any time, at will and without cause, upon not less than sixty (60) days' prior written notice to Supplier.

p. Return of Products. Any Member, in addition to and not in limitation of any other rights and remedies, will have the right to return Products to Supplier under any of the following circumstances: (1) the Product is ordered or shipped in error: (2) the Product is received damaged, or is defective or nonconforming: (3) the Product is one which a product manufacturer or supplier specifically authorizes for return: or (4) the Product is recalled. In addition, any Member, in addition to and not in limitation of any other rights and remedies, will have the right to return Supplies to Supplier under any of the following circumstances: (1) the Supplies are no longer needed by the Member due to deletion from its standard supply list or changes in usage patterns, provided the Supplies are returned at least six (6) months prior to their expiration date and are in re-saleable condition: or (2) the Supplies are received outdated or are otherwise unusable. Supplier agrees to accept the return of Products under each of the foregoing circumstances without charge and for full credit.

q. Failure to Supply. In the event of Supplier's failure to perform its supply obligations in accordance with the terms of this Section 4, the Member ma purchase or lease products equivalent to the Products from other sources and Supplier will be liable to the Member for all reasonable costs in excess of the Award Prices plus any other damages which they may incur. In such event, Supplier will also be liable to Novation and the Clients for any loss of Marketing Fees resulting from such failure plus any other damages which they may incur. The remedies set forth in this Subsection are in addition to any other rights and remedies Novation, the Clients or the Members may have resulting from such failure.

5. Product Quality.

a. Free From Defects. Supplier warrants the Products, including, but not limited to, all attachments, subsystems and components thereof, against defects in material, workmanship, design and manufacturing for the warranty period set forth in Exhibit L attached hereto ("Warranty Period"). Supplier will make all necessary arrangements to assign such warranty to the Members. Supplier further represents and warrants that the Products will conform to the specifications, drawings, and samples furnished by Supplier or contained in the Non-Price Specifications and will be safe for their intended use. If any Products are defective and a claim is made by a Member on account of such defect during the Warranty Period, Supplier will, at the


[***] Confidential treatment requested pursuant to a request for confidential treatment filed with the Securities and Exchange Commission. Omitted portions have been filed separately with the Commission.

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option of the Member, either replace the defective Products or credit the Member. Supplier will bear all costs of returning and replacing the defective Products, as well as all risk of loss or damage to the defective Products from and after the time they leave the physical possession of the Member. The warranties contained in this Subsection will survive any inspection, delivery, acceptance or payment by a Member. In addition, if there is at any time wide-spread failure of the Products even after the Warranty Period has ended, the Member may return all said Products for credit or replacement, at its option. This Subsection and the obligations contained herein will survive the expiration or earlier termination of this Agreement. The remedies set forth in this Subsection are in addition to and not a limitation on any other rights or remedies that may be available against Supplier.

b. Warranty Service. All warranty repairs will have [***] coverage at no additional charge where the Member will be allowed to determine whether the service response may be postponed until the following working day. During the Warranty Period, in the event the Equipment is inoperable for any reason, Supplier agrees to provide a loaner of the Equipment of identical (compatible with the system the Member is using) or superior type to the Member at its site at no additional charge during the term of this Agreement. The loaner equipment will be available and delivered to the Member's site within [***] of request at no charge to Member.

c. Replacement Parts. Replacement parts supplied by Supplier at any time, whether during or after the Warranty Period or the term of any service agreement, will be newly manufactured parts or assemblies, unless the Member agrees otherwise. In the case where new parts are not available, the service representative may install rebuilt parts in order to make the unit operational. Within thirty (30) days after the repair, the rebuilt parts must be replaced with newly manufactured parts. The Member may retain parts removed from the Equipment and all parts that are not eligible for or are not returned by the Member for Supplier credit will remain the property of the Member. In all cases where Supplier is permitted to charge the Member for parts, Supplier will only replace and charge for parts necessary to bring the Equipment to operating condition. Supplier will warrant replacement parts and labor associated with such replacement parts for one (1) year, or the period of time set forth in Supplier's standard warranty, whichever is longer.

d. Service Response Time. Supplier guarantees a response time of [***] by phone and [***] on-site for all warranty, contract or time and materials service calls requested by any Member during the life of the Equipment. In the event Supplier fails to comply with the provisions of this paragraph, Supplier will pay to Member liquidated damages in the amount set forth in Exhibit G.

e. Uptime Guarantee. For any calendar quarter during the Warranty Period and the term of any service agreement, Supplier guarantees that the Equipment will maintain a level of uptime equal to or better than [***]. Uptime will be calculated using the following formula:

uptime = (T - TNF) X 100

T


[***] Confidential treatment requested pursuant to a request for confidential treatment filed with the Securities and Exchange Commission. Omitted portions have been filed separately with the Commission.

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where `T" is the total number of hours that the Equipment is typically used per quarter (determined by multiplying the number of hours per day that the Equipment is typically used by the number of days per week that the Equipment is typically used, and multiplying the result by 13 weeks in a quarter), and "TNF" is the number of hours the Equipment or any component of the Equipment is not functional during the quarter (the hours calculated will only include those hours that the Equipment would typically be in use). If any portion of the total functionality of the Equipment is unavailable for operational use, the Equipment will be considered down. Downtime scheduled for preventive maintenance or any other scheduled event, including those for the convenience of Member, will not be included in the downtime calculation.

Member will calculate uptime after each calendar quarter. If uptime is less than [***], any lost revenue suffered by the Member for downtime beyond the allowable [***] during the quarter will be paid by Supplier to the Member. Lost revenue will be calculated by multiplying the number of procedures that would have been performed or the number of times the Equipment would have been used during any downtime times the Member's current charge rate per procedure or per use. The Member will give written notice to Supplier of its failure to meet the uptime requirement and the amount of lost revenues, and Supplier will pay such amount to the Member within [***] after receipt of the notice. In addition, Supplier will extend the Warranty Period or the service agreement without charge by [***] for every [***] the Equipment or component thereof is not operational beyond the allowable [***].

f. Preventive Maintenance. During the Warranty Period, Supplier will perform preventive maintenance according to the manufacturer's recommendations and the policies developed by the Member, [***]. Supplier will supply the Member with a written procedure that will be followed by Supplier's representative during the preventative maintenance process. Reasonable additional testing will be performed by Supplier [***], upon request, to meet the requirements of procedures developed by the Member. The frequency of preventive maintenance and tests performed will comply with the manufacturer's recommendations, external codes (state, JCAHO, etc.), and all internal policies developed by the Member. During the Warranty Period, Supplier will provide preventive maintenance after hours [***] if requested by the Member.

g. Upgrades. A list of optional software available from Supplier, including costs for the software both during the Warranty Period and after the Warranty Period, is attached hereto as Exhibit M. Each Member will be given all upgrades to acquired software, including any software components of Equipment, from the date of issuance of the purchase order through the expiration of the Warranty Period, including penalty extensions, and thereafter during the term of any service agreement, [***]. Arrangements will be made to install all software upgrades within two (2) weeks after the release of any software upgrade.

h. Customization Software. Pricing relating to the customization of software and additional charges that the Member will incur for annual maintenance, training, documentation, backup, etc. is attached hereto as Exhibit N.

i. Operational Software. The form of software licensure agreements available to the Members is attached hereto as Exhibit O. All software necessary to operate the Equipment,


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unless otherwise provided in any exhibit hereto, will be licensed to the Member upon acceptance of the Equipment pursuant to Subsection 4.i above. All new operational software will be provided to the Member, unless otherwise provided in Exhibit N, at no charge. throughout the Warranty Period and thereafter throughout the term of any service agreement. New software will be installed within (2) weeks after release.

j. Diagnostic Software. All software necessary to troubleshoot and maintain the Equipment will be supplied to the Member at no charge. The diagnostic software will be identical to that used by Supplier's service representative. Training for the use of diagnostic software will be included in the service training provided by Supplier, and Supplier's telephone support will also include assistance in diagnostic software operation. Training in the use of diagnostic software and diagnostic software upgrades will be offered by Supplier at no additional charge, unless otherwise provided in Exhibit N, to the Member for the life of the Equipment within the Member's facility. Software updates will be provided to the Member within two (2) weeks after the update release.

k. Data Conversion/Interfaces. In the event that the Equipment requires conversion of data at the time of installation or assembly, Supplier agrees to perform this conversion either manually or electronically [***]. A schedule of Supplier's pricing for performing data conversion thereafter during the Warranty Period and after the warranty has expired is included in Exhibit N attached hereto. The data conversion will include all data requested by the Member in writing. Supplier will inform Member, in writing, of the length of time required to perform the conversion prior to the issuance of the purchase order and will perform the conversion within such time. Supplier will also include all interfaces requested by the Member [***], unless otherwise provided in Exhibit N, to connect the Equipment to other information systems owned by the Member and its affiliates.

l. Service Contract Cancellation. The Member reserves the right to cancel any service agreement, without cause or penalty, with thirty (30) days prior written notification to Supplier. Payment reimbursement will be prorated and Supplier will separate costs for preventive maintenance and repair for the purpose of allocating expenses. Supplier will be required to leave the Equipment in certifiable condition as deemed by the Member. Supplier will not cancel the contract without a minimum of sixty (60) days prior written notification to the Member. Cancellation of the contract will not affect Supplier's response time and quality of support nor result in other penalties if the Member elects to use Supplier for time and materials repairs, perform the work in-house or obtain service from others.

m. Product Compliance. Supplier represents and warrants to Novation, the Clients and the Members that the Products are, if required, registered, and will not be distributed, sold, leased or priced by Supplier in violation of any federal, state or local law. Supplier represents and warrants that as of the date of delivery to the Members all Products will not be adulterated or misbranded within the meaning of the Federal Food, Drug and Cosmetic Act and will not violate or cause a violation of any applicable law, ordinance, rule, regulation or order. Supplier agrees it will comply with all applicable Good Manufacturing Practices and Standards contained in 21 C.F.R. Parts 210, 211, 225, 226, 600, 606, 610, 640, 660, 680 and 820. Supplier represents and warrants that it will provide adequate warnings and instructions to inform users of the Products


[***] Confidential treatment requested pursuant to a request for confidential treatment filed with the Securities and Exchange Commission. Omitted portions have been filed separately with the Commission.

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of the risks, if any, associated with the use of the Products. Supplier's representations, warranties and agreements in this Subsection will survive the expiration or earlier termination of this Agreement.

n. Patent Infringement. Supplier represents and warrants that the sale, lease or use of the Products will not infringe any United States patent. Supplier will, at its own expense, defend every suit which will be brought against Novation or a Member for any alleged infringement of any patent by reason of the sale, lease or use of the Products and will pay all costs, damages and profits recoverable in any such suit. This Subsection and the obligations contained herein will survive the expiration or earlier termination of this Agreement. The remedies set forth in this Subsection are in addition to and not a limitation on any other rights or remedies that may be available against Supplier.

o. Product Condition. Unless otherwise stated in the Non-Price Specifications or unless agreed upon by a Member in connection with Products it may order, all Products will be new. Products which are demonstrators, used, obsolete, seconds, or which have been discontinued are unacceptable unless otherwise specified in the Non-Price Specifications or the Member accepts delivery after receiving notice of the condition of the Products. A description of and pricing for demonstrators or refurbished Products is attached hereto as Exhibit P.

p. Recall of Products. Supplier will reimburse Members for any cost associated with any Product corrective action, withdrawal or recall requested by Supplier or required by any governmental entity. In the event a product recall or a court action impacting supply occurs, Supplier will notify Novation in writing within twenty-four (24) hours of any such recall or action. Supplier's obligations in this Subsection will survive the expiration or earlier termination of this Agreement.

q. Shelf Life. Sterile Products and other Supplies with a limited shelf life sold under this Agreement will have the longest possible shelf life and the latest possible expiration dates. Unless required by stability considerations, there will not be less than an [***] interval between (i) the date of delivery by Supplier of the Supplies to the Member and (ii) the expiration date of the Supplies.

6. Century Compliance.

a. Definitions. For purposes of this Section, the following terms have the respective meanings given below:

(1) "Systems" means any of the Products, systems of distribution for Products and Product manufacturing systems that consist of or include any computer software, computer firmware, computer hardware (whether general or special purpose), documentation, data, and other similar or related items of the automated, computerized, and/or software systems that are provided by or through Supplier or utilized to manufacture or distribute the Products provided by or through Supplier pursuant to this


[***] Confidential treatment requested pursuant to a request for confidential treatment filed with the Securities and Exchange Commission. Omitted portions have been filed separately with the Commission.

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Agreement, or any component part thereof, and any services provided by or through Supplier in Connection therewith.

(2) "Calendar-Related" refers to date values based on the "Gregorian calendar" (as defined in the Encyclopedia Britannica, 15th edition. 1982. page 602) and to all uses in any manner of those date values, including without limitation manipulations, calculations, conversions, comparisons, and presentations.

(3) "Century Noncompliance" means any aspects of the Systems that fail to satisfy the requirements set forth in Subsection 6.b below.

b. Representations. Supplier warrants, represents and agrees that the Systems satisfy the following requirements:

(1) In connection with the use and processing of Calendar-Related data, the Systems will not malfunction, will not cease to function, will not generate incorrect data, and will not produce incorrect results.

(2) In connection with providing Calendar-Related data to and accepting Calendar-Related data from other automated, computerized, and/or software systems and users via user inter-faces, electronic interfaces, and date storage, the Systems represent dates without ambiguity as to century.

(3) The year component of Calendar-Related data that is provided by the Systems to or that is accepted by the Systems from other automated, computerized, and/or software systems and user interfaces, electronic interfaces, and data storage is represented in a four-digit CCYY format, where CC represents the two digits expressing the century and YY represents the two digits expressing the year within that century (e.g.. 1996 or 2003).

(4) Supplier has verified through testing that the Systems satisfy the requirements of this Subsection including, without limitation, testing of each of the following specific dates and the transition to and from each such date: September 9, 1999; September 10, 1999; December 31, 1999; January 1, 2000; February 28, 2000; February 29, 2000; March 1, 2000; December 31, 2000: January 1. 2001; December 31, 2004; and January 1, 2005.

c. Remedies. In the event of any Century Noncompliance in the Systems in any respect, in addition to any other remedies that may be available to Novation or the Members, Supplier will, at no cost to the Members, promptly under the circumstances (but, in all cases, within thirty (30) days after receipt of a written request from any Member, unless otherwise agreed by the Member in writing) eliminate the Century Noncompliance from the Systems.

d. Noncompliance Notice. In the event Supplier becomes aware of (i) any possible or actual Century Noncompliance in the Systems or (ii) any international, governmental,

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industrial, or other standard (proposed or adopted) regarding Calendar-Related data and/or processing, or Supplier begins any significant effort to conform the Systems to any such standard, Supplier will promptly provide the Members with all relevant information in writing and will timely provide the Members with updates to such information. Supplier will respond promptly and fully to inquiries by the Members, and timely provide updates to any responses provided to the Members, with respect to (i) any possible or actual Century Noncompliance in the Systems or (ii) any international, governmental, industrial, or other standards. In the foregoing, the use of "timely" means promptly after the relevant information becomes known to or is developed by or for Supplier.

e. Survival. Supplier's representations, warranties and agreements in this Section will continue in effect throughout the Term and will survive the expiration or earlier termination of this Agreement.

7. Reports and Other Information Requirements.

a. Report Content. Within twenty (20) days after the end of each full and partial month during the Term ("Reporting Month"), Supplier will submit to Novation a report in the form of a diskette containing the following information in form and content reasonably satisfactory to Novation:

(1) the name of Supplier, the Reporting Month and year and the Agreement number (as provided to Supplier by Novation);

(2) with respect to each Member (described by LIC number (as provided to Supplier by Novation), health industry number (if applicable), full name, street address, city, state, zip code and, if applicable, tier and committed status), the number of units sold or leased and the amount of net sales and/or net lease revenues for each Product on a line item basis, and the sum of net sales and/or net lease revenues and the associated Marketing Fees for all Products purchased or leased by such Member directly or indirectly from Supplier during the Reporting Month, whether under the pricing and other terms of this Agreement or under the terms of any other purchasing. leasing, licensing, financing or pricing arrangements that may exist between the Member and Supplier;

(3) the sum of the net sales and/or net lease revenues and the associated Marketing Fees for all Products sold or leased to all Members during the Reporting Month; and

(4) such additional information as Novation may reasonably request from time to time.

b. Report Format and Delivery. The reports required by this Section will be submitted electronically in Excel Version 7 or Access Version 7 and in accordance with other specifications established by Novation from time to time and will be delivered to:

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Novation
Attn: SRIS Operations
220 East Las Colinas Boulevard
Irving, TX 75039

c. Other Information Requirements. In addition to the reporting requirements set forth in Subsections 7.a and 7.b above, the parties agree to facilitate the administration of this Agreement by transmitting and receiving information electronically and by complying with the information requirements set forth in Exhibit Q attached hereto. Supplier further agrees that, except to the extent of any inconsistency with the provisions of this Agreement, it will comply with all information requirements set forth in the Novation Information Requirements Guidebook ("Guidebook"). On or about the Effective Date, Novation will provide Supplier with a current copy of the Guidebook and will thereafter provide Supplier with updates and/or revisions to the Guidebook from time to time.

8. Obligations of Novation.

a. Information to Members. After issuing the Award Letter, Novation, in conjunction with the Clients, will deliver a summary of the purchasing and/or leasing arrangements covered by this Agreement to each Member and will, from time to time, at the request of Supplier, deliver to each Member reasonable and appropriate amounts and types of materials supplied by Supplier to Novation which relate to the purchase or lease of the Products.

b. Marketing Services. Novation, in conjunction with the Clients, will market the purchasing and/or leasing arrangements covered by this Agreement to the Members. Such promotional services may include, as appropriate, the use of direct mail, contact by Novation's field service delivery team, member support services, and regional and national meetings and conferences. As appropriate,
[***], in [***] with the [***], [***] involve [***] in these [***] by [***] to
[***] in [***] and [***] reasonable [***] with [***].

9. Marketing Fees.

a. Calculation. Supplier will pay to Novation, as the authorized collection agent for each of the Clients and certain of each Client's subsidiaries and affiliates, respectively (and not collectively), marketing fees ("Marketing Fees") belonging to any of the Clients or certain of their subsidiaries or affiliates equal to the Agreed Percentage of the aggregate gross charges of all net sales and net lease revenues of the Products to the Members directly or indirectly from Supplier, whether under the pricing and other terms of this Agreement or under the terms of any other purchasing, leasing, licensing, financing or pricing arrangements that may exist between the Members and Supplier. Such gross charges will be determined without any deduction for uncollected accounts or for costs incurred in the manufacture, provision, sale, lease or distribution of the Products, and will include, but not be limited to, charges for the sale or lease of products, the provision of installation, training and maintenance services, and the provision of


[***] Confidential treatment requested pursuant to a request for confidential treatment filed with the Securities and Exchange Commission. Omitted portions have been filed separately with the Commission.

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any other services listed on Exhibit A. The "Agreed Percentage" will be defined in the Award Letter.

b. Payment. On or about the Effective Date, Novation will advise Supplier in writing of the amount determined by Novation to be Supplier's monthly estimated Marketing Fees. Thereafter, Supplier's monthly estimated Marketing Fees may be adjusted from time to time upon written notice from Novation based on actual purchase data. No later than the tenth (10th) day of each month, Supplier will remit the monthly estimated Marketing Fees for such month to Novation. Such payment will be adjusted to reflect the reconciliation between the actual Marketing Fees payable for the second month prior to such month with the estimated Marketing Fees actually paid during such prior month. Supplier will pay all estimated and adjusted Marketing Fees by check made payable to "Novation, LLC." All checks should reference the Agreement number. Supplier will include with its check the reconciliation calculation used by Supplier to determine the payment adjustment, with separate amounts shown for each Client's component thereof. Checks sent by first class mail will be mailed to the following address: ----------------

[***]

Checks sent by courier (Federal Express, United Parcel Service or messenger) will be addressed as follows:
[***]

Please send a copy of the check to:
[***]

10. [***]


[***] Confidential treatment requested pursuant to a request for confidential treatment filed with the Securities and Exchange Commission. Omitted portions have been filed separately with the Commission.

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11. Nonpayment or Insolvency of a Member. If a Member fails to pay Supplier for Products, or if a Member becomes bankrupt or insolvent or makes an assignment for the benefit of creditors or goes into liquidation, or if proceedings are initiated for the purpose of having a receiving order or winding up order made against a Member, or if a Member applies to the court for protection from its creditors, then, in any such case, this Agreement will not terminate, but Supplier will have the right, upon prior written notice to Novation and the Member, to discontinue selling Products to that Member.

12. Insurance.

a. Policy Requirements. Supplier will maintain and keep in force during the Term product liability, general public liability and property damage insurance against any insurable claim or claims which might or could arise regarding Products purchased or leased from Supplier. Such insurance will contain a minimum combined single limit of liability for bodily injury and property damage in the amounts of not less than [***] per occurrence and [***] in the aggregate; will name Novation, the Clients and the Members, as their interests may appear, as additional insureds, and will contain an endorsement providing that the carrier will provide directly to all named insured copies of all notices and endorsements. Supplier will provide to Novation in its Bid and thereafter within [***] after Novation's request, an insurance certificate indicating the foregoing coverage, issued by an insurance company licensed to do business in the relevant states and signed by an authorized agent.

b. Self-Insurance. Notwithstanding anything to the contrary in Subsection 12.a above, Supplier may maintain a self-insurance program for all or any part of the foregoing liability risks, provided such self-insurance policy in all material respects complies with the requirements applicable to the product liability, general public liability and property damage insurance set forth in Subsection 12.a. Supplier will provide Novation in its Bid and thereafter within fifteen (15) days after Novation's request: (1) the self-insurance policy; (2) the name of


[***] Confidential treatment requested pursuant to a request for confidential treatment filed with the Securities and Exchange Commission. Omitted portions have been filed separately with the Commission.

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the company managing the self-insurance program and providing reinsurance, if any: (3) the most recent annual reports on claims and reserves for the program; and (4) the most recent annual actuarial report on such program.

c. Amendments, Notices and Endorsements. Supplier will not amend, in any material respect that affects the interests of Novation, the Clients or the Members, or terminate said liability insurance or self-insurance program except after thirty (30) days' prior written notice to Novation and will provide to Novation copies of all notices and endorsements as soon as practicable after it receives or gives them.

13. Compliance with Law and Government Program Participation.

a. Compliance With Law. Supplier represents and warrants that to the best of its knowledge, after due inquiry, it is in compliance with all federal, state and local statutes, laws, ordinances and regulations applicable to it ("Legal Requirements") which are material to the operation of its business and the conduct of its affairs, including Legal Requirements pertaining to the safety of the Products, occupational health and safety, environmental protection. nondiscrimination, antitrust, and equal employment opportunity. During the Term, Supplier will: (1) promptly notify Novation of any lawsuits, claims, administrative actions or other proceedings asserted or commenced against it which assert in whole or in part that Supplier is in noncompliance with any Legal Requirement which is material to the operation of its business and the conduct of its affairs and (2) promptly provide Novation with true and correct copies of all written notices of adverse findings from the U.S. Food and Drug Administration ("FDA") and all written results of FDA inspections which pertain to the Products.

b. Government Program Participation. Supplier represents and warrants that it is not excluded from participation, and is not otherwise ineligible to participate, in a "Federal health care program" as defined in 42 U.S.C. (S) 1320a-7b(f) or in any other government payment program. In the event Supplier is excluded from participation, or becomes otherwise ineligible to participate in any such program during the Term, Supplier will notify Novation in writing within three (3) days after such event, and upon the occurrence of such event, whether or not such notice is given to Novation, Novation may immediately terminate this Agreement upon written notice to Supplier.

14. RELEASE AND INDEMNITY. SUPPLIER WILL RELEASE, INDEMNIFY, HOLD HARMLESS, AND, IF REQUESTED, DEFEND NOVATION, THE CLIENTS AND THE MEMBERS, AND THEIR RESPECTIVE OFFICERS, DIRECTORS, REGENTS, AGENTS, SUBSIDIARIES, AFFILIATES AND EMPLOYEES (COLLECTIVELY, THE "INDEMNITEES"), FROM AND AGAINST ANY CLAIMS, LIABILITIES, DAMAGES, ACTIONS, COSTS AND EXPENSES (INCLUDING, WITHOUT LIMITATION, REASONABLE ATTORNEYS' FEES, EXPERT FEES AND COURT COSTS) OF ANY KIND OR NATURE, WHETHER AT LAW OR IN EQUITY, INCLUDING CLAIMS ASSERTING STRICT LIABILITY, ARISING FROM OR CAUSED IN ANY PART BY (1) THE BREACH OF ANY REPRESENTATION, WARRANTY, COVENANT OR AGREEMENT OF SUPPLIER CONTAINED IN THIS AGREEMENT OR IN THE BID; (2) THE CONDITION OF ANY PRODUCT, INCLUDING A DEFECT IN MATERIAL, WORKMANSHIP, DESIGN OR MANUFACTURING; OR (3) THE WARNINGS AND

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INSTRUCTIONS ASSOCIATED WITH ANY PRODUCT. [***]; PROVIDED, HOWEVER, THAT SUCH INDEMNIFICATION, HOLD HARMLESS AND RIGHT TO DEFENSE WILL NOT BE APPLICABLE WHERE THE CLAIM, LIABILITY, DAMAGE, ACTION, COST OR EXPENSE ARISES [***] AS A RESULT OF AN ACT OR FAILURE TO ACT OF INDEMNITEES. THIS SECTION AND THE OBLIGATIONS CONTAINED HEREIN WILL SURVIVE THE EXPIRATION OR EARLIER TERMINATION OF THIS AGREEMENT. THE REMEDIES SET FORTH IN THIS SECTION ARE IN ADDITION TO AND NOT A LIMITATION ON ANY OTHER RIGHTS OR REMEDIES THAT MAY BE AVAILABLE AGAINST SUPPLIER.

15. Books and Records; Facilities Inspections. Supplier agrees to keep, maintain and preserve complete, current and accurate books, records and accounts of the transactions contemplated by this Agreement and such additional books, records and accounts as are necessary to establish and verify Supplier's compliance with this Agreement. All such books, records and accounts will be available for inspection and audit by Novation representatives at any time during the Term and for two (2) years thereafter, but only during reasonable business hours and upon reasonable notice. Novation agrees that its routine audits will not be conducted more frequently than twice in any consecutive twelve (12) month period, subject to Novation's right to conduct special audits whenever it deems it to be necessary. In addition, Supplier will make its manufacturing and packaging facilities available for inspection from time to time during the Term by Novation representatives, but only during reasonable business hours and upon reasonable notice. The exercise by Novation of the right to inspect and audit is without prejudice to any other or additional rights or remedies of either party.

16. Use of Names, Etc. Supplier agrees that it will not use in any way in its promotional, informational or marketing activities or materials (i) the names, trademarks, logos, symbols or a description of the business or activities of Novation or any Client or Member without in each instance obtaining the prior written consent of the person owning the rights thereto: or (ii) the award or the content of this Agreement without in each instance obtaining the prior written consent of Novation.

17. Confidential Information.

a. Nondisclosure. Supplier agrees that it will:

(1) keep strictly confidential and hold in trust all Confidential Information, as defined in Subsection 17.b below, of Novation, the Clients and the Members:

(2) not use the Confidential Information for any purpose other than the performance of its obligations under this Agreement, without the prior written consent of Novation;


[***] Confidential treatment requested pursuant to a request for confidential treatment filed with the Securities and Exchange Commission. Omitted portions have been filed separately with the Commission.

-18-

(3) not disclose the Confidential Information to any third party (unless required by law) without the prior written consent of Novation: and

(4) not later than thirty (30) days after the expiration or earlier termination of this Agreement, return to Novation, the Client or the Member, as the case may be, the Confidential Information.

b. Definition. "Confidential Information," as used in Subsection 17.a above, will consist of all information relating to the prices and usage of the Products (including all information contained in the reports produced by Supplier pursuant to Section 7 above) and all documents and other materials of Novation, the Clients and the Members containing information relating to the programs of Novation, the Clients or the Members of a proprietary or sensitive nature not readily available through sources in the public domain. In no event will Supplier provide to any person any information relating to the prices it charges the Members for Products ordered pursuant to this Agreement without the prior written consent of Novation.

18. Miscellaneous.

a. Choice of Law. This Agreement will be governed by and construed in accordance with the internal substantive laws of the State of Texas and the Texas courts will have jurisdiction over all matters relating to this Agreement:
provided, however, the terms of any agreement between Supplier and a Member will be governed by and construed in accordance with the choice of law and venue provisions set forth in such agreement.

b. Not Responsible. Novation and the Clients and their subsidiaries and affiliates will not be responsible or liable for any Member's breach of any purchasing commitment or for any other actions of any Member. In addition, none of the Clients will be responsible or liable for the obligations of another Client or its subsidiaries or affiliates or the obligations of Novation or Supplier under this Agreement.

c. Third Party Beneficiaries. All Clients and Members are intended third party beneficiaries of this Agreement. All terms and conditions of this Agreement which are applicable to the Clients will inure to the benefit of and be enforceable by the Clients and their respective successors and assigns. All terms and conditions of this Agreement which are applicable to the Members will inure to the benefit of and be enforceable by the Members and their respective successors and assigns.

d. Notices. Except as otherwise expressly provided herein, all notices or other communications required or permitted under this Agreement wilt be in writing and will be deemed sufficient when mailed by United States mail, or delivered in person to the party to which it is to be given, at the address of such party set forth below:

-19-

If to Supplier:

To the address set forth by Supplier in the Bid

If to Novation:

Novation
Attn: General Counsel
220 East Las Colinas Blvd.
Irving, TX 75039

or such other address as the party will have furnished in writing in accordance with the provisions of this Subsection.

e. No Assignment. No assignment of all or any part of this Agreement may be made without the prior written consent of the other party; except that Novation may assign its rights and obligations to any affiliate of Novation. Any assignment of all or any part of this Agreement by either party will not relieve that party of the responsibility of performing its obligations hereunder to the extent that such obligations are not satisfied in full by the assignee. This Agreement will be binding upon and inure to the benefit of the parties' respective successors and assigns.

f. Severability. Whenever possible, each provision of this Agreement will be interpreted in such a manner as to be effective and valid under applicable law, but if any provision of this Agreement will be prohibited by or invalid under applicable law, such provision will be ineffective to the extent of such prohibition or invalidity without invalidating the remainder of such provision or the remaining provisions of this Agreement. Each party will, at its own expense, take such action as is reasonably necessary to defend the validity and enforceability of this Agreement and will cooperate with the other party as is reasonably necessary in such defense.

g. Entire Agreement. This Agreement, together with the exhibits listed below, will constitute the entire agreement between Novation and Supplier. This Agreement, together with the exhibits listed below and each Member's purchase and/or lease order and/or other applicable Form will constitute the entire agreement between each Member and Supplier. In the event of any inconsistency between this Agreement and a Member's purchase and/or lease order and/or other applicable Form, the terms of this Agreement will control, except that the Member's purchase and/or lease order and/or other applicable Form will supersede Sections 4 and 5 of this Agreement in the event of any inconsistency with such Sections. No other terms and conditions in any document, acceptance, or acknowledgment will be effective or binding unless expressly agreed to in writing. The following exhibits are incorporated by reference in this Agreement:

Exhibit A   Product and Service Description and Pricing

Exhibit B   Non-Price Specifications

                                      -20-

Exhibit C   Special Conditions

Exhibit D   Award Letter

Exhibit E   Forms of Purchase, Lease, License, Financing and/or Service
            Agreements

Exhibit F   Minimum Delivery Schedule

Exhibit G   Liquidated Damages

Exhibit H   Terms and Conditions for New Technology Exchange

Exhibit I   Site Preparation

Exhibit J   Installation/Assembly

Exhibit K   Description and Schedule of Technical Service Training

Exhibit L   Warranty

Exhibit M   Optional Software

Exhibit N   Pricing Relating to Customization of Software, Operational or
            Diagnostic Software and/or Data Conversion/Interfaces

Exhibit O   Form of Software License Agreement

Exhibit P   Other Information Requirements

Exhibit Q   Agreement Exception Form


SUPPLIER:         Natus Medical Inc.
                  ------------------

ADDRESS:          1501 Industrial Road
                  --------------------
                  San Carlos, CA 94070
                  --------------------

SIGNATURE:        /s/ June M. Fallon
                  --------------------------

TITLE:            Vice President-Field Operations       Date: 6-25-99
                  -------------------------------             -------

-21-

EXHIBIT A

PRODUCT AND SERVICE DESCRIPTION AND PRICING

Newborn Hearing Screening Equipment
Types:
Automated Auditory Brainstem Response Equipment Automated Otocoustic Emission Equipment Combination ABR and OAE Equipment

Desired abilities:
Screening decibels of 70 dB & 40 dB Able to descend in 10dB steps and 20dB steps Able to construct customized protocols

Product typically regularly updated to best, most appropriate model of computer available.
Current product specifications and descriptions attached.


ALGO                                                                    NATUS(R)
Newborn Hearing Screener
Model 2e Color

                                 1999 Novation
                               Hardware Pricing

                                           Negotiated
                                            Novation       Committed      Super Committed
       Product           List Price       Member Price      Pricing*     Pricing** (1,2,3)
-------------------------------------------------------------------------------------------
ALGO(TM) Model 2e Color
  Newborn Hearing        $17,500.00           [***]          [***]            [***]
     Screener

------------------------------------------------------------------------------------------

ALGO(TM) Portable
Newborn Hearing          $10,900.00           [***]          [***]            [***]
     Screener
---------------------------------------------------------------------------------------
C-Stat End Tidal
 Breath Analyzer         $19,500.00           [***]          [***]            [***]
------------------------------------------------------------------------------------------

*Committed Pricing: 1. Hospital commits to [***] of all [***] with [***]

**Super Committed Pricing: 1. Hospital commits to [***] of all [***] with [***]
2. One (1) Natus [***] purchased for [***]
3. Minimum of [***]


[***] Confidential treatment requested puruant to a request for confidential treatment filed with the Securities and Exchange Commission. Omitted portions have been filed separately with the Commission.

1999 Novation Combination Hardware Pricing*

                                                                               Special Combination
               Natus                                        List Price               Pricing
--------------------------------------------------------------------------------------------------------
     ALGO(TM) Model 2e Color Newborn Hearing Screener       $17,500.00
                         and                                   and                    [***]
          CO-Stat(TM) End Tidal Breath Analyzer             $19,500.00

--------------------------------------------------------------------------------------------------------

     ALGO(TM) Portable Newborn Hearing Screener             $10,900.00
                         and                                   and                    [***]
        CO-Stat(TM) End Tidal Breath Analyzer               $19,500.00

--------------------------------------------------------------------------------------------------------

* Applies to product on single purchase order or products purchased within 3 month time frame.

Note: CO-Stat as available. May be upgraded configuration.


[***] Confidential treatment requested puruant to a request for confidential treatment filed with the Securities and Exchange Commission. Omitted portions have been filed separately with the Commission.

1999 Novation
ALGO-COLORADO PAK

                          Quantity Discount Schedule

Screens per year     Number of       Volume       Cost per    Cost per
  per facility         Boxes        Discount        Box        Screen
----------------------------------------------------------------------

1-252                1-7           list price     $351.00       $9.75

253-540              8-15             [***]        [***]       [***]

541-1,692            16-47            [***]        [***]       [***]

1,693-3,168          48-88            [***]        [***]       [***]

3,169-3,456          89-96            [***]        [***]       [***]

3,457-10,000         97-278           [***]        [***]       [***]

10,001-16,000        279-445          [***]        [***]       [***]

16,001-25,000        446-695          [***]        [***]       [***]

25,001-35,000        696-973          [***]        [***]       [***]

35,001-100,000       974-2,778        [***]        [***]       [***]

100,001-125,000      2,779-3,472      [***]        [***]       [***]

125,001-150,000      3,473-4,167      [***]        [***]       [***]

150,001+             4,168+           [***]        [***]       [***]

Note:
1 box contains 36 screens


[***] Confidential treatment requested pursuant to a request for confidential treatment filed with the Securities and Exchange Commission. Omitted portions have been filed separately with the Commission.

                                 1999 Novation
                           CO-Stat Nasal Sampler Pak
                          Quantity Discount Schedule

                     Number of       Volume       Cost per    Cost per
 Tests per year        Boxes        Discount        Box        Screen
----------------------------------------------------------------------

1-252                1-7           list price     $504.00      $14.00

253-540              8-15             [***]        [***]       [***]

541-1,692            16-47            [***]        [***]       [***]

1,693-3,168          48-88            [***]        [***]       [***]

3,169-3,456          89-96            [***]        [***]       [***]

3,457-10,000         97-278           [***]        [***]       [***]

10,001-16,000        279-445          [***]        [***]       [***]

16,001-25,000        446-695          [***]        [***]       [***]

25,001-35,000        696-973          [***]        [***]       [***]

35,001-100,000       974-2,778        [***]        [***]       [***]

100,001-125,000      2,779-3,472      [***]        [***]       [***]

125,001-150,000      3,473-4,167      [***]        [***]       [***]

150,001+             4,168+           [***]        [***]       [***]

Note: 1 box contains 36 screens


[***] Confidential treatment requested pursuant to a request for confidential treatment filed with the Securities and Exchange Commission. Omitted portions have been filed separately with the Commission.

1999 Novation MiniMuffs Neonatal Noise Attentuators

                          Quantity Discount Schedule

        Pairs        Number          Volume       Cost per    Cost per
      Per Year      of Boxes        Discount        Box         Pair
----------------------------------------------------------------------

1-252                1-7           list price     $180.00      $5.00

253-540              8-15             [***]        [***]       [***]

541-1,692            16-47            [***]        [***]       [***]

1,693-3,168          48-88            [***]        [***]       [***]

3,169-3,456          89-96            [***]        [***]       [***]

3,457-10,000         97-278           [***]        [***]       [***]

10,001-16,000        279-445          [***]        [***]       [***]

16,001-25,000        446-695          [***]        [***]       [***]

25,001-35,000        696-973          [***]        [***]       [***]

35,001-100,000       974-2,778        [***]        [***]       [***]

100,001-125,000      2,779-3,472      [***]        [***]       [***]

125,001-150,000      3,473-4,167      [***]        [***]       [***]

150,001+             4,168+           [***]        [***]       [***]

Note: 1 box contains 36 pairs


[***] Confidential treatment requested puruant to a request for confidential treatment filed with the Securities and Exchange Commission. Omitted portions have been filed separately with the Commission.

Newborn
Hearing
Screener

[GRAPHIC OMITTED]

AABR(TM) AUTOMATED AUDITORY BRAINSTEM RESPONSE TECHNOLOGY: SPECIFICALLY CONCEIVED FOR NEWBORN HEARING SCREENING

Natus patented AABR technology is based upon the "Gold Standard" auditory brainstem response (ABR) test, used for diagnostic assessment of hearing impairment for over twenty years. AABR technology results from a fundamental consideration of the challenges of newborn hearing screening.

. Accuracy: sensitivity and specificity are essential.
. Objectivity: pass/refer results, no professional interpretation.
. Ease of use: fast, cost-effective screening.

Natus' AABR technology screens the entire hearing pathway, from the ear to the brainstem - the most complete approach available to detect hearing impairment.

The ALGO screener is the only device which has been designed and clinically tested specifically to screen newborns for hearing impairment, and has been clinically proven to be both highly sensitive and specific.

EASY TO USE AND COST-EFFECTIVE

The ALGO Model 2e Color screener incorporates a graphical user interface with provides simple, step-by-step instructions. There are three basic steps:
preparation, screening and recording of results. Its also features an on-line video tutorial program and help menus which can be easily accessed at any time. Both ears can be screened simultaneously at the touch of a button, providing final results in minutes.

CONVENIENT DATA MANAGEMENT

The ALGO(TM) Model 2e Color newborn hearing screener automatically stores screening results and an expanded set of relevant patient information. The information stored by the screener can be customized to ensure key parameters are retained for each newborn screened. The expanded patient information contains the standard high risk indicators that are recommended by the American Academy of Pediatrics.

The ALGO DataBook(R) NHS Data Tracking Software included with the screener, automatically retrieves the results of every screen, allowing for convenient tracking of patient outcomes.

NATUS: THE INDUSTRY LEADER

Clinicians have relied on ALGO screeners for over a decade and they are currently used in successful newborn hearing screening programs in over 22 countries. ALGO screeners are accurate, objective and easy to use - the most clinically appropriate, cost effective tools for newborn hearing screening.


SPECIFICATIONS: ALGO(TM) MODEL 2E COLOR NEWBORN HEARING SCREENER


Product:          ALGO(TM) Model 2e Color Newborn Hearing Screener

Warranty:         1 year parts and labor.

Manufacturer:     Natus Medical Incorporated
                  1501 Industrial Road
                  San Carlos, CA 94070-4111
                  (650) 802-0400
                  (800) 255-3901
                  Fax: (650) 802-0401
                  Customer_Service@natusmed.com

Newborn Hearing Screener includes:

Detachable screening module with laptop computer Natus screening station (cart with built-in storage) Screening station cover Fully integrated ALGO DataBook(R) NHS data tracking system software
Label printer
Patient cable assembly (PCA) and pre-amplifier cable Laptop lock
Acoustic transducer assembly cable Acoustic check kit
Starter kit of supplies Power cord
User Manual

Supporting Clinical Education Supplies and Services included with the instrument:
(These services are typically available, but may be updated)
Clinical Education inservice training Newborn Hearing Screening Program Book Inservice packet
Press kit materials
Inservice training video Parent education video

The ALGO is the only screener that uses patented AABR(TM) Automated Auditory Brainstem Response technology to evaluate the ABR response with a clinically proven algorithm. The theoretical sensitivity of the instrument is 99.96%.

Page 1 of 3

SPECIFICATIONS: ALGO(TM) MODEL 2E COLOR NEWBORN HEARING SCREENER


Instruments Requirements

. Instrument must provide Pass/Refer results which are objective, easily understood and do not require interpretation.

. Results must be available immediately after screen, before time of patient discharge.

. Results must be automatically stored in an integrated data management system.

. Instrument must provide screen of complete hearing pathway from ear to brainstem.

. Instrument must be simple to use, requiring minimal training to reach proficiency.

. Instrument must be non-invasive, requiring nothing be inserted into the ear.

Technical Specifications

Instrument shall have:

. AABR Automated Auditory Brainstem Response technology, for automatic waveform template matching and recognition at 35 dB nHL. Optional template matching at 40 and 70 dB nHL.

. Preamp and Amplifier: Gain in 105 dB; the Output Voltage is + 12 VDC with a CMRR of more than 80 dB; Notch Filer is -12 dB @ 60 Hz, -12 dB @ 50 Hz; Bandpass Filter between the ranges of 0.05-1.5 kHz, 6 dB/octave high pass, 24 dB/octave low pass; Input Noise is 0.8 V rms @ 0.05-1.5 kHz.

. Dual Artifact Rejection System: Myogenic noise rejection filter of 2 (mu)V rms @ 275 Hz and Ambient noise rejection filter of 50 dB SPL @ 2 kHz. The instrument must also display a visual warning if either the myogenic or ambient noise rejection system has been employed.

. On screen display, and automatic printout of objective Pass/Refer result.

. On screen display of appropriate impedance measurements.

. Ability to screen ears simultaneously at 35 dB nHL.

. Stimulator with click duration of 100 (mu)sec, intensity of 35 dB nHL, with alternating polarity. The acoustic frequency spectrum must be 700-5000 hz (+ 10dB). Optional screening feature with click intensity of 40 and 70 dB nHL.

. Sweep rate of 37 pulses/sec. For the right ear and 34 pulses/sec for the left ear (simultaneous test). Sweep count of 15,000 maximum.

. Line operated power supply.

. On screen user instructions.

Page 2 of 3

SPECIFICATIONS: ALGO(TM) MODEL 2E COLOR NEWBORN HEARING SCREENER


Technical Specifications (continued)

. Patient demographic filed for automatic transfer of entered information into data tracking system. Fields to include high risk indicators for hearing impairment.

. Data management system output in standard ASCII format via floppy diskette.

. On screen "HELP" instructions.

. Built-in printer which automatically prints the screening results onto labels.

. Compatible with patented, single-use Ear Couplers(R) ear phones for ambient noise attenuation.

. Compatible with single-use Jelly Button(R) sensors for maximum conductivity and minimum neonatal skin irritation.

. Display a visual warning to the user if the electrode impedance drifts above acceptable range during a test.

. Screening station cart for mobility and convenient supply storage.

. Extended Warranty shall be available upon expiration of the Warranty period.

Physical Characteristics

. Dimensions:

Detachable screening module:    Laptop Open:   13.5" high x 13.5" wide x
                                               16.5" deep
                                Laptop Closed: 5.5" high x 13.5" wide x
                                               16.5" deep

                                Weight: 21 pounds (9.55 kg).

Screening station:              34.5" high x 18" wide x 18" deep

                                Weight: 40 pounds (18.2 kg)

. Certified to comply with UL 544, CSA 601, and EN60601-1-2 (pending)

Page 3 of 3

[LOGO] NATUS
Newborn Hearing Screener


Newborn Hearing Screener

[GRAPHIC OMITTED]

AABR(TM) AUTOMATED AUDITORY BRAINSTEM RESPONSE TECHNOLOGY: SPECIFICALLY CONCEIVED FOR NEWBORN HEARING SCREENING

Natus patented AABR technology is based upon the "Gold Standard" auditory brainstem response (ABR) test, used for diagnostic assessment of hearing impairment for over twenty years. AABR technology results from fundamental consideration of the challenges of newborn hearing screening.

. Accuracy, sensitivity and specificity are essential.

. Objectivity; pass/refer results, no professional interpretation.

. Ease of use; fast, cost-effective screening.

Natus' AABR technology screens the entire hearing pathway, from the ear to the brainstem - the most complete approach available to detect hearing impairment.

The ALGO screener is the only device which has been designed and clinically tested specifically to screen newborns for hearing impairment, and has been clinically proven to be both highly sensitive and specific.

IDEALLY PACKAGED FOR A RANGE OF SCREENING SETTINGS

Weighing less than five pounds, the ALGO Portable screener's compact size makes it an ideal screening tool where portability is desired.

Whether the baby is in the newborn nursery, the doctor's office, clinic or even at home, the battery-operated ALGO Portable screener provides the flexibility to screen newborns in a variety of settings.

NATUS: THE INDUSTRY LEADER

Clinicians have relied on ALGO screeners for over a decade, and they are currently used in successful newborn hearing screening programs in over 22 countries. ALGO screeners are accurate, objective and easy to use - the most clinically appropriate, cost effective tools for newborn hearing screening.


SPECIFICATIONS: ALGO(TM) Portable Newborn Hearing Screener


Product:          ALGO(TM) Portable Newborn Hearing Screener

Warranty:         1 year parts and labor.

Manufacturer:     Natus Medical Incorporated
                  1501 Industrial Road
                  San Carlos, CA 94070-4111
                  (650) 802-0400
                  (800) 255-3901
                  Fax: (650) 802-0401
                  Customer_Service@natusmed.com

Newborn Hearing Screener includes:

Thermal Paper Printer
Battery Pack
Battery Charger
Patient cable assembly (PCA) and pre-amplifier cable Carrying case
Acoustic transducer assembly cable Acoustic check kit
Starter kit of supplies User Manual

Supporting Clinical Education Supplies and Services included with the instrument: (These services are typically available, but may be updated) Clinical Education inservice training Newborn Hearing Screening Program Book Inservice packet
Press kit materials
Inservice training video Parent education video

The ALGO is the only screener that uses patented AABR(TM) Automated Auditory Brainstem Response technology to evaluate the ABR response with a clinically proven algorithm. The theoretical sensitivity of the instrument is 99.96%

Instrument Requirements

. Instrument must provide Pass/Refer results which are objective, easily understood and do not require interpretation.

. Results must be available immediately after screen, before time of patient discharge.

. Instrument must provide screen of complete hearing pathway from ear to brainstem.

. Instrument must be simple to use, requiring minimal training to reach proficiency.

. Instrument must be non-invasive, requiring nothing be inserted into the ear.

Page 1 of 3

SPECIFICATIONS: ALGO(TM) PORTABLE NEWBORN HEARING SCREENER


Technical Specifications

Instrument shall have:

. AABR Automated Auditory Brainstem Response technology, for automatic waveform template matching and recognition at 35 dB nHL.

. Preamp and Amplifier: Gain in 105 dB; the Output Voltage is + 12 VDC with a CMRR of more than 80 dB; Notch Filer is -12 dB @ 60 Hz, -12 dB @ 50 Hz; Bandpass Filter between the ranges of 0.05-1.5 kHz, 6 dB/octave high pass, 24 dB/octave low pass; Input Noise is 0.8V rms @ 0.05-1.5 kHz.

. Dual Artifact Rejection System: Myogenic noise rejection filter of 2 (mu)V rms @ 275 Hz and Ambient noise rejection filter of 50 dB SPL @ 2 kHz. The instrument must also display a visual warning if either the myogenic or ambient noise rejection system has been employed.

. Display, and automatic printout, of objective Pass/Refer result: likelihood ration (LR) and the number of sweeps (SWP) required for both the left and right ear separately.

. Display of appropriate impedance measurements.

. Ability to screen ears sequentially.

. Stimulator with click duration of 100 (mu)sec, intensity of 35 dB nHL, with alternating polarity. The acoustic frequency spectrum must be 700-5000 Hz (+/- 10 dB).

. Sweep rate of 37.3 pulses/sec. Sweep count of 15,000 maximum.

. Battery pack used as power supply.

. Thermal paper printer which automatically prints the results. Printer output includes Pass or Refer, LR, and number of sweeps.

. Compatible with patented patient-dedicated disposable Ear Couplers(R) ear phones for ambient noise attenuation.

. Compatible with Jelly Buttons(R) sensors for maximum conductivity and minimum neonatal skin irritation.

. Display a visual warning to the user if the electrode impedance drift above acceptable range during a test.

. Carrying case for mobility of testing.

. Extended Warranty shall be available upon expirations of the Warranty period.

Page 2 of 3

SPECIFICATIONS: ALGO(TM) PORTABLE NEWBORN HEARING SCREENER


Physical Characteristics

. Dimensions (screener): 8.0 x 9.2 x 2.6 inches (H x W x D) 20.2 x 23.2 x 6.6 cm

. Weight (with battery): 4.25 lbs. (1.93 kg)

Page 3 of 3

Co-stat(TM)
End Tidal Breath Analyzer

NATUS

[GRAPHIC OMMITTED]

Revealing More About Neonatal Jaundice Than Ever Before

IDENTIFYING HEMOLYSIS - A CRITICAL COMPONENT IN THE MANAGEMENT OF NEONATAL JAUNDICE.

The CO-Stat end Tidal Breath Analyzer is the only device available for use in the neonatal nursery to non-invasively detect the presence of hemolysis, assisting in the rapid identification of those at risk for hyperbilirubinemia or other hemolytic disease. The ability to accurately identify the presence or absence of hemolysis provides one of the most clinically significant pieces of information necessary for the effective management of neonates with jaundice and hyperbilirubinemia. Early detection of at-risk patients aids in different diagnosis and more appropriate follow-up, allowing for cost-effective care and optimal patient outcomes.

BILIRUBIN PRODUCTION - A MORE DIRECT MEASURE OF HEMOLYSIS.

Neonates are commonly evaluated with a series of laboratory tests to identify those infants with jaundice caused by hemolytic disease, since they are at higher risk of bilirubin toxicity and require more aggressive treatment.* However, due to their lack of sensitivity and specificity, currently available laboratory tests make the diagnosis of hemolysis, or its exclusion, elusive.* Because heme degradation yields equimolar concentrations of carbon monoxide (CO) and bilirubin, end tidal carbon monoxide (ETCO) provides an estimation of the rate of bilirubin production and a more direct measure of hemolytic rate.*


EXHIBIT B

NON-PRICE SPECIFICATIONS

Please include in this Exhibit information on what assistance your company will offer our hospitals in the development, implementation and maintenance of their universal infant hearing screening programs.

See attached

Term of Contract -- February 1, 2000 through January 31, 2003, with two optional one-year extensions.

Novation marketing fee -- [***]

For "Super Committed" participation level, an additional [***] fee will be added for the [***].


[***] Confidential treatment requested pursuant to a request for confidential treatment filed with the Securities and Exchange Commission. Omitted portions have been filed separately with the Commission.

CLINICAL EDUCATION NATUS


SUCCESSFUL SCREENING PROGRAMS REQUIRE NOT ONLY ADVANCE TECHNOLOGY, BUT COMPREHENSIVE TRAINING AND SUPPORT.

More than just a developer of the most advanced medical equipment, Natus is committed to supporting every aspect of a newborn hearing screening program. Highly qualified clinical educators provide every customer with comprehensive, hands-on training. Our customers receive educational tools designed for a diverse screening staff, from neonatologists to volunteers, and support materials for program follow-up.

With every ALGOTM Newborn Hearing Screener, you receive the best equipment available, as well as comprehensive training materials, including educational videos and handbooks with examples of successful ALGO screening programs nationwide.

The ALGO screener's standardized technology combined with the expertise of our clinical educators allows you to focus on patient care. Natus is the only company with the capacity an experience required to implement universal newborn screening at any level, in hospital or state-based programs.

Helping you meet the standard of care in your hospital community, and state. That's Natus.

NATUS MEDICAL CLINICAL EDUCATION INCLUDES:

. On-Site Inservice training

. Newborn Hearing Screening Program Handbook

. Inservice and Parent Educational Videos

. Clinical References

. Ongoing Customer and Technical Support

. Ongoing Program Support

[GRAPHIC OMITTED]

Natus Medical Inc.
1501 Industrial Road
San Carlos, CA 94070-4111
650-802-0400
800-255-3901
Fax: 650-802-0401
Customer_Service@natusmed.com
www.natus.com


EXHIBIT C

SPECIAL CONDITIONS

This page was intentionally left blank.


[LETTERHEAD OF NOVATION]

EXHIBIT D

Award Letter

December 15, 1999

Ms. June Fallon
Vice President - Worldwide Sales
Natus Medical Inc.
1501 Industrial Road
San Carlos, CA 94070-4111

Subject: Acceptance of Bid (Supplier Agreement # CE 90270)

Dear Ms. Fallon:

Novation, LLC ("Novation"), acting in its capacity as agent for VHA, UHC, and HPPI, respectively (and not collectively) and certain of their respective subsidiaries and affiliates, accepts our sole-sourced proposal for universal infant hearing screening equipment in response to our Invitation To Bid dated May 7, 1999, which was signed and dated by you on June 25, 1999. Attached to this letter is Exhibit Q of CE90270.

The "Agreed Percentage" for the Marketing Fee will be [***] and for the [***] the Marketing Fee will be [***].

The Effective Date of this Agreement will be February 1, 2000.

Novation looks forward to a successful implementation of this Agreement.

Sincerely,

/s/ Eldon Petersen

Eldon Petersen
Group Senior Vice President
Novation, LLC


[***] Confidential treatment requested pursuant to a request for confidential treatment filed with the Securities and Exchange Commission. Omitted portions have been filed separately with the Commission.

EXHIBIT E

FORMS OF PURCHASE, LEASE, LICENSE, FINANCING
AND/OR SERVICE AGREEMENTS

Financing: Natus agrees to cooperate with Member's request for alternative financing which may be offered through third parties upon Natus' review and acceptance of any such program.


EXHIBIT F

MINIMUM DELIVERY SCHEDULE

Delivery of Hardware: [***]
Delivery of Supplies: [***]

These terms are part of our standard terms noted on all quotations. Terms are also confirmed with the customer via fax and/or phone when the order is received.


[***] Confidential treatment requested pursuant to a request for confidential treatment filed with the Securities and Exchange Commission. Omitted portions have been filed separately with the Commission.

EXHIBIT G

LIQUIDATED DAMAGES

Not applicable-None


EXHIBIT H

TERMS AND CONDITIONS FOR NEW TECHNOLOGY EXCHANGE

As offered and available, upgrades and trade-ins allowances will be offered to Novation Members at a [***] at or [***] or [***] to [***] who [***] at a
[***] or [***].


[***] Confidential treatment requested pursuant to a request for confidential treatment filed with the Securities and Exchange Commission. Omitted portions have been filed separately with the Commission.

EXHIBIT I

SITE PREPARATION

Not applicable


EXHIBIT J

INSTALLATION/ASSEMBLY

Not applicable


EXHIBIT K

SCHEDULE OF TECHNICAL SERVICE TRAINING

Not applicable


EXHIBIT L

WARRANTY

Warranty is valid for one year from the date of purchase.



WARRANTY - ALGO(TM) NEWBORN HEARING SCREENER


Standard Warranty

Natus Medical Inc. warrants to the initial Purchaser that each new "Warranted Product" purchased hereunder will be free from defects in workmanship and materials for a specified period of one year ("Warranty Period") from the date of its initial shipment to Purchaser. "WARRANTED Products" consist solely of (a) each product which expressly states that the product includes a warranty for a specified time period (the Warranty Period for that product), and (b) those other Natus products for which express warranties are given and Warranty Periods are stated in the user manuals or package inserts for such products. Repair or replacement of Products under this warranty does not extend the Warranty Period.

Natus' only obligations under this warranty are (1) to repair or replace any Warranted Product (or part thereof) that Natus reasonably determines to be covered by this warranty and to be defective in workmanship or materials and (2) to provide loaner equipment in the circumstances stated below.

To request repair or replacement under this warranty, Purchaser should contact Natus at 1501 industrial Road, San Carlos, California 94070, 1-800-255-3901 or 650-802-0400. If, on the basis of the information provided by Purchaser, Natus reasonably believes that the defect is covered by this warranty, Natus will authorize Purchaser to return the Warranted Product (or part thereof) to Natus. If the Warranted Product is to be repaired rather than replaced, Natus will promptly ship a comparable loaner product for use by Purchaser during the period that the Warranted Product or part is at the Natus facility for service. Natus shall determine whether to repair or replace products and parts covered by this warranty and all Products or parts replaced shall become property of Natus. In the course of warranty service, Natus may, but shall not be required to, make engineering improvements to the Warranted product or part thereof.

Loaner Policy

Purchaser is responsible for any damage to or loss of any loaner equipment while it is at Purchaser's location. Purchaser must return loaner equipment within 14 days after receiving the repaired or replaced product or receiving notice from Natus that the Product returned by Purchaser is not covered by warranty. If Purchaser does not return loaner equipment within 14 days after the return due date, then Purchaser agrees to pay Natus reasonable value of the loaner equipment or a reasonable daily rental fee, whichever Natus selects.



Shipping Procedures

If Natus reasonably determined that a repair or replacement is covered by the warranty, Natus shall bear the costs of shipping the loaner Product and the repaired or replacement Product to Purchaser. All other shipping costs shall be paid by Purchaser. Risk of loss or damage during shipments under this warranty shall be borne by the party shipping the Product.

Products shipped by Purchaser under this warranty shall be suitably packaged to protect the Product. If Purchaser ships a product to Natus in unsuitable packaging, any physical damage present in the Product on receipt and inspection by Natus (and not previously reported) will be presumed to have occurred in transit and will be the responsibility of Purchaser.

Exclusions

This warranty does not extend to any Warranted Products or parts thereof: that have been subject to misuse, neglect or accident; that have been damaged by causes external to the Warranted Product, including by but not limited to failure of or faulty electrical power; that have been used in violation of Natus' instructions; that have been affixed to any nonstandard accessory attachment; on which the serial number has been removed or made illegible; that have been modified by anyone other than Natus; or that have been disassembled, serviced or reassembled by anyone other than Natus, unless authorized prior to such service by Natus. ALGO(TM) Newborn Hearing Screener calibration is not covered under standard warranty service.

Natus makes no warranty (a) with respect to ALGO(TM) Newborn Hearing Screeners, any other disposable products or any other products that are not Warranted Products, (b) with respect to any products purchased from a person other than Natus or a Natus-authorized distributor or (c) with respect to any product sold under a brand name other than Natus.

THIS WARRANTY, TOGETHER WITH ANY OTHER EXPRESS WRITTEN WARRANTY THAT MAY BE ISSUED BY NATUS, IS THE SOLE AND EXCLUSIVE WARRANTY AS TO NATUS' PRODUCTS, EXTENDS ONLY TO THE PURCHASER AND IS EXPRESSLY IN LIEU OF ANY OTHER ORAL OR IMPLIED WARRANTIES INCLUDING WITHOUT LIMITATION ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. NATUS SHALL NOT BE LIABLE FOR ANY INCIDENTAL, SPECIAL OR CONSEQUENTIAL LOSS, DAMAGE OR EXPENSE (INCLUDING, WITHOUT LIMITATION, LOST PROFITS) DIRECTLY ARISING FROM THE SALE, INABILITY TO SELL, USE OR LOSS OF USE OF ANY PRODUCT.

Extended Warranty

Extended warranties are available to cover the ALGO(TM) Newborn Hearing Screener. An extended warranty covers all items listed under the standard warranty agreement above and is valid for one year. The extended warranty also covers ONE annual calibration. To inquire about pricing, please contact Natus Technical Service.


EXHIBIT M

OPTIONAL SOFTWARE
(if applicable)

Not applicable


EXHIBIT N

PRICING RELATING TO
CUSTOMIZATION OF SOFTWARE
(if applicable)

Not applicable


EXHIBIT O

FORM OF SOFTWARE LICENSE AGREEMENT
(if applicable)

See attached

Other third party commercial licenses available on request.


(i.e. NT, McAfee, etc.)


NATUS SOFTWARE LICENSE AGREEMENT

IMPORTANT - READ CAREFULLY: This Natus Software License Agreement (NSLA) is a legal agreement between you (either an individual or a single entity) and Natus Medical Incorporated (Natus) for the software included with the ALGO(TM) Newborn Hearing Screening System (ALGO System) and any software options or upgrades supplied therewith, which includes computer software and associated media, printed materials, and "online" or electronic documentation ("SOFTWARE PRODUCT"). By installing or otherwise using the SOFTWARE PRODUCT, you agree to be bound by the terms of this NSLA. If you do not agree to the terms of this NSLA, do not install or use the SOFTWARE PRODUCT; you may, however, return it and the rest of the ALGO System to the company or authorized distributor from which you purchased it for a full refund by following the procedure for authorized product returns set forth in the materials supplied with the product.

SOFTWARE PRODUCT LICENSE

The SOFTWARE PRODUCT is protected by copyright laws and international copyright treasures, as well as other intellectual property laws and treaties. The SOFTWARE PRODUCT is part of a medical device and may not be modified in any way. The SOFTWARE PRODUCT is licensed, not sold.

1. GRANT OF LICENSE. This NSLA grants you the following rights:

1.1 License. You may install and use one copy of the SOFTWARE PRODUCT on the ALGO System with which it was supplied.

1.2 Limitations on Modification, Reverse Engineering, Decompilation, And Disassembly. You may not nor may you allow or encourage any third party to, modify, reverse engineer, decompile, or disassemble the SOFTWARE PRODUCT, except and only to the extent that such activity is expressly permitted by applicable law notwithstanding this limitation.

1.3 Separation of Components. The SOFTWARE PRODUCT is licensed as a single product. Its component parts may not be separated for use on more than one computer.

1.4 Rental. You may not rent, lease, or lend the SOFTWARE PRODUCT.

1.5 Software Transfer. You may not sell, lend, lease, or otherwise transfer the SOFTWARE PRODUCT to any third party without Natus' prior written consent which Natus may withhold at its sole discretion.

1.6 Termination. Without prejudice to any other rights, Natus may terminate this NSLA if you fail to comply with the terms and conditions of this NSLA. In such event, you may not use the SOFTWARE PRODUCT or any of its component parts in any way.

2. COPYRIGHT. All title and copyrights in and to the SOFTWARE PRODUCT (including but not limited to any images, photographs, animations, video, audio, music, text, and "applets" incorporated into the SOFTWARE PRODUCT), the accompanying printed materials, and any copies of the SOFTWARE PRODUCT are owned by Natus or its suppliers. The SOFTWARE PRODUCT is protected by copyright laws and international treaty provisions. Therefore, you must treat the SOFTWARE PRODUCT like any other copyrighted material except that you may install the SOFTWARE PRODUCT on the ALGO System with which it was supplied. You may not copy the printed materials accompanying the SOFTWARE PRODUCT.

3. U.S. GOVERNMENT RESTRICTED RIGHTS. If you are acquiring the SOFTWARE PRODUCT on behalf of any part of the United States Government, the following provisions apply. The SOFTWARE PRODUCT and accompanying documentation are deemed to be "commercial


computer software" and "commercial computer software documentation" respectively pursuant to DFAR Section 227 7202 and FAR 12.212(b), as applicable. Any use, modification, reproduction, release, performance, display, or disclosure of the SOFTWARE PRODUCT and/or the accompanying documentation by the U.S. Government or any of its agencies shall be governed solely by the terms of this NSLA and shall be prohibited except to the extent expressly permitted by the terms of this NSLA. Any technical data provided that is not covered by the above provisions is deemed to be "technical data-commercial items" pursuant to DFAR Section
227.7015(a). Any use, modification, reproduction, release, performance, display, or disclosure of such technical data shall be governed by the terms of DFAR
Section 227.7015(b).

4. MISCELLANEOUS

4.1 Governing Law. This NSLA is governed by the laws of the State of California (without regard to its conflict of law rules).

4.2 Severability. In the event that any court of competent jurisdiction declares any portion of this NSLA invalid or otherwise unenforceable, the remainder of this NSLA shall remain in force and shall be unaffected by such invalidity or unenforceability.

4.3 Entire Agreement. This NSLA constitutes the entire agreement between the parties pertaining to the subject matter hereof and supersedes all prior and contemporaneous agreements, negotiations, and understandings, oral or written.

5. LIMITED WARRANTY

5.1 Warranty. The SOFTWARE PRODUCT is warranted as part of the ALGO System. The warranty for the product is set forth in the documentation for the product.

5.2 Disclaimer. NATUS DOES NOT WARRANT THAT THE SOFTWARE PRODUCT WILL BE ERROR FREE OR THAT ITS USE WILL BE UNINTERRUPTED. THE WARRANTY SPECIFIED IN PARAGRAPH 5.1 IS THE SOLE WARRANTY APPLICABLE TO THE SOFTWARE PRODUCT AND NATUS HEREBY DISCLAIMS ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NONINFRINGEMENT.

6. INDEMNIFICATION OF NATUS. You hereby indemnify Natus, its officers, directors, and employees, and agree to defend and hold them harmless from and against any and all fines, liability, damage, loss, or expense (including reasonable attorneys fees) arising from any third party claim, demand, action, or proceeding based upon (a) any operation or failure of the ALGO System caused by any improper maintenance of, modification of, or tampering with the SOFTWARE PRODUCT or any other portion of the ALGO System by you or any third party, (b) any operation or failure of the ALGO System caused by your failure to install any updated or corrected software provided to you directly or indirectly by Natus, or incurred in the settlement or avoidance of any such claim, provided, however, that Natus shall give prompt notice to you of the assertion of any such claims and provided further that you shall have the right to select counsel and participate (at your own expense) in the defense thereof.

7. CONFLICT WITH REGULATORY REQUIREMENTS. In the event of any conflict between the terms of this NSLA and any law, or federal or state medical device regulations, such law or regulations shall prevail and the conflicting provisions of this NSLA shall be deemed inoperative.


EXHIBIT P

OTHER INFORMATION REQUIREMENTS

Novation and Supplier desire to facilitate contract administration transactions ("Transactions") by electronically transmitting and receiving data in agreed formats in substitution for conventional paper-based documents and to assure that such Transactions are not legally invalid or unenforceable as a result of the use of available electronic technologies for the mutual benefit of the parties.

The parties agree as follows:

1. Prerequisites.

a. Documents: Standards. Each party will electronically communicate to or receive from the other party all of the required documents listed in the Novation Electronic Communication Requirements Schedule attached hereto (collectively "Documents"). All Documents will be communicated in accordance with the standards set forth in the applicable sections of the Novation Information Requirements Guidebook ("Guidebook"). Supplier agrees that the Guidebook is the Confidential Information of Novation and will not disclose information contained therein to any other party.

b. Third Party Service Providers. Documents will be communicated electronically to each party, as specified in the Guidebook, through any third party service provider ("Provider") with which either party may contract or VHAseCure.net(TM). Either patty may modify its election to use, not use or change a Provider upon thirty (30) days' prior written notice. Each party will be responsible for the costs of any Provider with which it contracts. unless the parties otherwise mutually agree in writing.

c. Signatures. Each party will adopt as its signature an electronic identification consisting of symbol(s) or code(s) which are to be affixed to or contained in each Document transmitted by such party ("Signatures"). Each party agrees that any Signature of such party affixed to or contained in any transmitted Document will be sufficient to verify such party originated and intends to be bound by such Document. Neither party will disclose to any unauthorized person the Signatures of the other party.

2. Transmissions.

a. Verification. Upon proper receipt of any Document, the receiving party will promptly and properly transmit a functional acknowledgment in return, unless otherwise specified in the Guidebook.

b. Acceptance. If acceptance of a Document is required by the Guidebook, any such Document which has been properly received will not give rise to any obligation unless and until

the party initially transmitting such Document has properly received in return an Acceptance Document (as specified in the Guidebook).

c. Garbled Transmission. If any properly transmitted Document is received in an unintelligible or garbled form, the receiving party will promptly notify the originating party (if identifiable from the received Document) in a reasonable manner. In the absence of such a notice, the originating party's records of the contents of such Document will control.

3. Transaction Terms.

a. Confidentiality. No information contained in any Document or otherwise exchanged between the parties will be considered confidential, except to the extent provided by written agreement between the parties, or by applicable law.

b. Validity: Enforceability. Any Document properly transmitted pursuant to this Agreement will be considered, in connection with any Transaction, to be a "writing" or "in writing"; and any such Document when containing, or to which there is affixed, a Signature ( "Signed Documents") will be deemed for all purposes to have been "signed" and to constitute an "original" when printed from electronic files or records established and maintained in the normal course of business.

4. Standards.

ASC x 12 - Novation Information Requirements Guidebook

5. Third Party Service Providers.

(If the parties will be transmitting Documents directly, insert "NONE")

Company       Van Name        Address                    Telephone
-------       --------        -------                    ---------
                              Number
                              ------

Novation     AT&T             12976 Hollander Drive      800/624-5672
                              Bridgeton, MO 63044

-2-

NOVATION ELECTRONIC COMMUNICATION REQUIREMENTS SCHEDULE

This form is being completed by: June Fallon        Date: 11-17-99
                                 -----------------        -------------
                                   (Your Name)

Your Company Name: Natus Medical Inc.          Your Title: VP - Field Operations
                   --------------------------              ---------------------

Phone: (800) 255-3901     E-mail: jfallon@natus.com    Fax: (650) 802-6620
       -----------------          -------------------       -------------------

Please complete the following questionnaire. Your answers to the following will be used for planning purposes by the Novation Information Services staff. If your company can already send the listed electronic information, please note this in the date field.

-----------------------------------------------------------------------------------------------------------------------------------
                                                                                                        WHEN WILL YOUR
                                                                                                       COMPANY MEET THIS
NOVATION REQUIREMENT                                    NOVATION EXPECTATION                         REQUIREMENT (MM/DD/YY)
-----------------------------------------------------------------------------------------------------------------------------------
Requirement 1:   New Contract Launch               This only applies to new contracts          Your Novation product manager will
                                                   unless your company never provided          address this as new contacts are
                 See Section 4.2                   this information.  If needed, your          negotiated
                                                   Novation product manager will contact
                                                   you.
                                                   Due at Contract Signing
-----------------------------------------------------------------------------------------------------------------------------------
Requirement 2:   Ongoing Contract Maintenance      Novation must receive contract item         Date: 11/17/99
                                                   and pricing updates as prices change,
                 See Section 4.3                   and when items are added or deleted         Will send information via (check one)
                                                   form contract.                                  (   )    EDI 832
                                                   Due 60 days prior to the effective              ( X )    Novation Interim
                                                   date of the line item add/delete/change                  File Format
-----------------------------------------------------------------------------------------------------------------------------------
Requirement 3A   Summary Sales Reporting           Current paper reports must be                Date: 11/17/99
                                                   converted to electronic reporting
                 See Section 4.4.2                 immediately.  This will not be needed        You will report sales by
                                                   once your company can report line item          (  ) LIC or (  ) HIN (x) Zip code
                                                   sales.  See Requirement 3B.                  One or the other MUST BE USED
                                                   Due at the first contract reporting
                                                   period.
-----------------------------------------------------------------------------------------------------------------------------------
Requirement 3B:  Detailed Line Item Sales          Instead of monthly summary reports,          Date: 11/17/99
                 Reporting                         detailed line item reports will be           You will report sales by
                                                   sent electronically.  Plan for a             ( ) LIC Number or ( ) HIN Zip Code
                 See Section 4.4.3                 90-day testing period before
                                                   stopping Requirement 3A.                     (x) Interim file or (  )EDI 867
                                                   Begin testing within 120 days of             If using interim file, proposed
                                                   contract effective date                      date for converting to EDI
                                                                                                Date: unknown
                                                                                                One of the other MUST BE USED
-----------------------------------------------------------------------------------------------------------------------------------
Requirement 4:   Membership                        You must be able to receive and              Date: 11/17/99
                                                   process periodic membership updates
                 See Section 4.5                   Due immediately                                e-mail
-----------------------------------------------------------------------------------------------------------------------------------
Requirement 5:   Commitment Forms                  Details which members have and have          Date: 11/17/99
                                                   not signed your contract enrollment
                                                   forms, if needed.
                 See section 4.6                   Due immediately, if applicable                 e-mail
-----------------------------------------------------------------------------------------------------------------------------------
Requirement 6:   Sales Representative Contract     Able to update Sales Representative          Date: 11/17/99
                 Information                       information from a Business Partner
                                                   Repository System download.                    e-mail
                 See Section 4.7                   Due within 30 days of contract signing.
-----------------------------------------------------------------------------------------------------------------------------------
Requirement 7:   Product Cross-referencing         Able to update the items on contract         Date: 11/17/99
                                                   with competitive cross-reference
                                                   information.
                 See Section 4.8                   Due within 90 days of contract signing         e-mail
-----------------------------------------------------------------------------------------------------------------------------------
Business Partner Repository System (BPRS) Access   Able to connect to Novation BPRS via         Date: 11/17/99
                                                   the VHAseCURE.net(TM).                       How many of our company employees
                 See Section 3.0                   Due within 60 days of contract signing.      need access to your Novation BPRS
                                                                                                site? 5
-----------------------------------------------------------------------------------------------------------------------------------
                                                     Return within 30 Days to:
             Bill King, Manager, Supply Partner Operations, Novation LLC, 220 East Las Colinas Blvd., Irving, TX 75039
                            Telephone: (972) 581-5022, Fax: (972) 581-5154, E-mailbking@novationco.com

-3-

EXHIBIT Q
AGREEMENT EXCEPTION FORM

Supplier Name: Natus Medical Inc.

Printed Name: June Fallon

Authorized

Signature:     /s/  W. H. Lawrenson
               ---------------------
               W. H. LAWRENSON, CFO

Title:         Vice President-Field Operations                   Date: 11/23/99
               -------------------------------                         --------

The agreement is hereby amended by the following items:

Page 1. Section 1a. Introduction - Purchasing and Leasing Opportunities for Members. End of section.

-Add "Not withstanding the above, Member will not include any Supplier customer that, at the time of placing an order, declares themselves to be a member of a different buying group, or who maintains they are not a member of Novation. Supplier will keep Novation apprised of apparent differences in memberships.

Page 2. Section 2c. Contract Award - [***] Terms. 2/nd/ sentence. -After second reference to [***] add [***]

Page 2. Section 2c. Contract Award - [***] Terms. 4/th/ sentence.
-Change sentence to read, "If at any time during the [***] any [***] that [***] or [***] are [***], [***] may provide [***] of such [***] to
[***], and [***] within [***] days for [***] and within [***] days for all other [***], advise [***] in [***] of and [***] will [***] agree that [***] will [***]."
-Add "The parties shall [***] to reach such [***]."

Page 2. Section 2e. Contract Award - Notification of Changes of Pricing and Terms. 1/st/ sentence.
-Change [***]
-Delete [***] to [***].
-Change "change" to [***]

Page 2. Section 2e. Contract Award - Notification of Changes of Pricing and Terms. 2/nd/ sentence.
-Delete sentence.

Page 3. Section 2f. Contract Award - Underutilized Businesses. 2/nd/ sentence.
-After 2/nd/ reference to "Novation" add "commercially reasonable" -After the word "programs" add "of which Member informs Novation in writing"

Page 3. Section 2f. Contract Award - Underutilized Businesses. End of section.
-Add to end of section. "Information will be supplied to Novation as is routinely available from Supplier."

Page 3. Section 3b. Terms and Termination - Termination by Novation. Subsection (1).


[***] Confidential treatment requested pursuant to a request for confidential treatment filed with the Securities and Exchange Commission. Omitted portions have been filed separately with the Commission.

-After "Agreement" add "after being given [***] prior written notice of breach and opportunity to cure, except for a breach of either Section 9 or Section 13, for which there shall be no cure period."

Page 3. Section 3b. Term and Termination - Termination by Novation. Last sentence.

-The number [***] is changed to [***].

Page 3. Section 3c. Termination by Supplier.
-Add to end of sentence "and may terminate immediately if Novation is in breach of Section 13."

Page 3. Section 4a. Product Supply - Delivery and Invoicing. 1/st/ sentence.


-Change "destination" to [***].

Page 3. Section 4a. Product Supply - Delivery and Invoicing 2/nd/ sentence.
-Change "absorb" to [***].

Page 4. Section 4a. Product Supply - Delivery and Invoicing. 4/th/ sentence.
-After the word "needs" add "and when mutually agreed to at the time of order."

Page 4. Section 4a. Product Supply - Delivery and Invoicing. Last sentence.
-After last reference to "Agreement" add "unless otherwise agreed to by Member."

Page 4. Section 4b. Product Supply - Supplies. Second sentence.


-After the "All" add "reasonable".

-After the word "Supplies" add "as long as all Product recommendations and Directions for use are in full compliance."

Page 4. Section 4c. Product Supply - Product Fill Rates; Confirmation and Delivery Times. 2/nd/ sentence.
-After the word "via" add "either hard copy or by" -Change [***]
-Delete all words after the 2/nd/ reference to the word "within" -After the 2/nd/ reference to the word "within" add "specified and usual delivery terms."

Page 4. Section 4d. Product Supply - Manuals/Schematics/Inspection Procedures. 2/nd/ sentence.
-After the word "manuals" add "for user maintained items in accordance with Supplier's Product warranty and guidelines"

Page 4. Section 4d. Product Supply - Manuals/Schematics/Inspection Procedures. Last sentence.
-Change "two (2) to [***]

Page 4. Section 4f. Product Supply - Discontinuation of Products; Changes is Packaging. 1/st/ sentence.
-After "unilateral right" add "unless implemented on a national basis to all customers"

Page 4. Section 4f. Product Supply - Discontinuation of Products; Changes in Packaging. 2/nd/ sentence.
-Change [***] to [***]

Page 4. Section 4f. Product Supply - Discontinuation of Products; Changes in Packaging. 3/rd/ sentence.
-After "Novation's agreement" add "which agreement will not be unreasonably withheld,"

Page 5. Section 4f. Product Supply - Discontinuation of Products; Changes in Packaging. 4th sentence Part (ii).
-Add [***]

Page 5. Section 4f. Product Supply - Discontinuation of Products, Changes in Packaging. 4th sentence Part (iii).

-Add [***]


[***] Confidential treatment requested pursuant to a request for confidential treatment filed with the Securities and Exchange Commission. Omitted portions have been filed separately with the Commission.

Page 5. Section 4h. Product Supply - New Technology. 1/st/ sentence.
-After "thereof" and "when such technology is ready for the market."

Page 5. Section 4i. Product Supply - Product Acceptance. Entire Section.
-Delete in its entirety.
-Replace with "At the [***] of the [***], [***] will [***] with an [***] and a [***] at [***] to the [***] for the [***] the [***] of the [***] for a period not to exceed [***]. [***] will [***] return [***] at the
[***] of the [***]."

Page 6. Section 4j. Product Supply - Site Preparation.
-Delete in its entirety as section is not applicable.

Page 6. Section 4k. Product Supply - Installation/Assembly.
-Delete in its entirety as section is not applicable.

Page 6. Section 4l. Product Supply - Installation/Environmental Issues. 1/st/ sentence.

-"Supplier" is changed to [***].

Page 6. Section 4m. Product Supply - Member Services. 2/nd/ sentence.


-After the word "and" add ", if applicable,".

-After first reference to "representatives" delete remainder of sentence.

Page 6. Section 4n. Product Supply - Training. 1/st/ through 4/th/ sentences.
-Delete in their entirety.

Pages 6 and 7. Section 4n. Product Supply - Training. 5/th/ sentence.
-Delete "In addition,".
-After the word "provide" add "reasonable, mutually agreeable". -Change [***] to [***].
-Change "for the period required" to "for a reasonable period as required"

Page 7. Section 4n. Product Supply - Training. Last sentence.
-Change "Member" to "Member (original owner)". -Change "the life" to "the reasonable life". -Change "no additional charge" to [***]. -Delete "regardless of where training is performed".

Page 7. Section 4o. Product Supply - Product Deletion.
-Delete entire Section.

Page 7. Section 4p. Product Supply - Return of Products. 1/st/ sentence. Subsection (1).
-Delete "ordered or"

Page 7. Section 4p. Product Supply - Return of Products. 1/st/ sentence. Subsection (2).
-After "nonconforming" add "through no act or omission of the Member;"

Page 7. Section 4p. Product Supply - Return of Products. 2/nd/ sentence.
-Delete "under any of the following circumstances: (1) the Supplies are no longer needed by the Member due to deletion from its standard supply list or changes in use patterns, provided the Supplies are returned at least (6) months prior to their expiration date and are in re- saleable condition; or (2)"
-After "Supplier" add "if"

Page 7. Section 4q. Product Supply - Failure to Supply. 1/st/ sentence.


[***] Confidential treatment requested pursuant to a request for confidential treatment filed with the Securities and Exchange Commission. Omitted portions have been filed separately with the Commission.

-After the word "sources" add ", as may be specified in the Product Documentation and labeling from time to time.

Page 7. Section 4q. Product Supply - Failure to Supply. End of section.
-Add [***] of any [***] shall be [***] to the extent that [***] is
[***] by [***] or [***] or [***]. [***] in [***] shall [***] have
[***] for any [***] or [***], [***] and on [***], whether for [***] (including [***]) or otherwise, [***] this [***] including but not limited to [***] such [***] has been [***] of the [***] of [***]. These [***] shall [***] any [***] of any [***]. The [***] such [***] from [***] shall have used [***] to [***] the [***] of the [***] and
[***]. If such [***] occurs [***] for a [***] or [***], the [***] not
[***] the [***] may [***] upon [***] to the [***]."

Page 8. Section 5a. Product Quality - Free From Defects. 3rd sentence -After "will" add "substantially".

Page 8. Section 5a. Product Quality - Free From Defects. 7/th/ sentence.
-Change "widespread failure" to read "a general recall". -Delete "credit or".
-Delete "at its option".

Page 8. Section 5a. Product Quality - Free From Defects. Last sentence.
-End of sentence add "elsewhere under this Agreement".

Page 8. Section 5b. Product Quality - Warranty Service. 2/nd/ sentence.
-After "reason" add "due to the fault of the Supplier".

Page 8. Section 5b. Product Quality - Warranty Service. Last sentence.
-After the last "Member" add "per Supplier's Technical Services Terms and Conditions".

Page 8. Section 5c. Product Quality - Replacement Parts. 1/st/ sentence.


-After "assembles", add "if available".

Page 8. Section 5c. Product Quality - Replacement Parts. 4/th/ sentence.
-Delete entire sentence.

Page 8. Section 5c. Product Quality - Replacement Parts. Last sentence.
-After the word "longer" add "for parts it manufactures, or its third party vendor's standard warranty for parts it purchases."

Page 8. Section 5d. Product Quality - Service Response Time. 1/st/ sentence.
-Delete "guarantees".
-After "Supplier" add "will make best efforts to provide" -Change "one (1)" to [***].

-After the word "phone" delete [***]

-Delete "service".
-After the word "equipment" add "; on-site service is not appropriate or not available."

Page 9. Section 5e. Product Quality - Up Time Guarantee. 2/nd/ paragraph. Sentences 2, 3, 4.
-Delete [***].

Page 9. Section 5e. Product Quality - Up Time Guarantee. 2/nd/ paragraph. Sentence 5.
-Delete [***].


[***] Confidential treatment requested pursuant to a request for confidential treatment filed with the Securities and Exchange Commission. Omitted portions have been filed separately with the Commission.

-After [***] add "as is supported by continuous auditable written records of such up time"

Page 9. Section 5g. Product Quality-Upgrades. 2/nd/ sentence.


-Change "given" to "offered".

-Change [***] to [***] at [***] any such [***] becomes [***].

Page 9. Section 5g. Product Quality-Ugrades. 3/rd/ sentence.
-Delete in its entirety

Page 9. Section 5g. Product Quality - Upgrades. End of section.
-Add "Documentation will be made available to assist users in the installation".

Page 9. Section 5h. Product Quality - Customization Software.
-Delete in its entirety.

Page 10. Section 5i. Product Quality-Operation Software. 3/rd/ sentence.
-After "software" add "proprietary to Supplier and commercially available".
-After "Member" add "only to the extent licensed by the Supplier"

Page 10. Section 5i. Product Quality-Operation Software. 2nd sentence -After "Member" add only to the extent licensable by Supplier"

Page 10. Section 5i. Product Quality-Operation Software. 3rd sentence -After "software" add "and commercially available"

Page 10. Section 5i. Product Quality-Operation Software. Last sentence.
-Change "be installed within two (2) weeks after release" to "be user installable".

Page 10. Section 5j. Product Quality-Diagnostic Software. Entire Section.
-Delete in its entirety

Page 10. Section 5k. Product Quality-Data Conversion/Interfaces. 1/st/ sentence.


-Change "perform" to "support".

-After 2/nd/ reference to "conversion", add "by providing information normally provided by Supplier which may be useful in the Member's data conversion".

Page 10. Section 5k. Product Quality-Data Conversion/Interfaces. 2/nd/ sentence.
-Delete in its entirety.

Page 10. Section 5k. Product Quality-Data Conversion/Interfaces. 3/rd/ sentence.
-After "requested" add "and publicly available as requested".

Page 10. Section 5k. Product Quality-Data Conversion/Interfaces. 5/th/ sentence.
-Delete in its entirety.

Page 10. Section 51. Service Contract Cancellation.
-Delete entire section.

Page 10. Section 5(m). Product Compliance.
-After each reference to Products add "manufactured by or under the direction of Supplier".

Page 11. Section 5n. Product Quality - Patent Infringement. 1/st/ sentence.
-After "warrants" insert "to the best of its knowledge and belief".


[***] Confidential treatment requested pursuant to a request for confidential treatment filed with the Securities and Exchange Commission. Omitted portions have been filed separately with the Commission.

Page 11. Section 5n. Product Quality - Patent Infringement. End of section.
-Add "Uses Excluded from Patent Indemnity. (i) the use of the Product modified or altered in any way except as expressly modified, authorized or specified by Supplier; (ii) the combination, operation, or use of the Products with any equipment not supplied by Supplier or expressly authorized or specified by Supplier; or (iii) any alteration of the Products made by any person other than Supplier except as expressly authorized or specified by Supplier.".

Page 11. Section 5p. Product Quality - Recall of Products. 1/st/ sentence.
-After "Member" replace "any cost" with "actual and reasonable costs".

Page 11. Section 5q. Product Quality-Shelf Life. 2/nd/ sentence.
-Change [***] to [***].

Page 13. Section 7a. Reports and Other Information Requirements - Report Content. Subsection (4).

-After "Novation" add "and Supplier".
-Change "request" to "agree upon".

Page 14. Section 7c. Reports and Other Information Requirements-Other Information Requirements. End of section.
-Add "Electronic commerce will be provided when available, in accordance with industry guidelines".

Page 14. Section 8b. Obligations of Novation. Marketing Services. End of section.
-Add "[***] will support [***] to [***] and [***]."

Page 14. Section 9a. Marketing Fees-Calculation. 1/st/ sentence.
-After "net lease revenues" and ", including [***] and [***],".

Page 15. Section 9b. Marketing Fees-Payment.
-Delete [***].
-Add "[***] will pay [***] on [***], as determined in [***], for the
[***] by the [***]."

Page 15. Section 9b. Marketing Fee - Payment. Third paragraph.
-After "check" add [***]

Page 16. Section 10. [***].
-Delete [***].

Page 16. Section 11. Nonpayment or Insolvency of a Member. First sentence.
-Delete "prior".

Page 16. Section 12a. Insurance-Policy Requirements. 2/nd/ sentence.
-Change [***] to [***].
-Delete [***].

Page 16. Section 12a. Insurance-Policy Requirements. 3/rd/ sentence.
-Change [***] to [***].

Page 17. Section 14. Release and Indemnity. 1/st/ sentence.
-Delete [***].


[***] Confidential treatment requested pursuant to a request for confidential treatment filed with the Securities and Exchange Commission. Omitted portions have been filed separately with the Commission.

Page 18. Section 14. Release and Indemnity. 2/nd/ sentence.
-Delete [***].

-Change "WHERE" to "TO THE EXTENT";
-Delete [***].

Page 18. Section 15. Books and Records; Facilities Inspections. 2/nd/ sentence.
-After "audit by" add "an independent CPA designated by". -Delete "representatives".

Page 18. Section 15. Books and Records; Facilities Inspections. 3/rd/ sentence.
-Delete "subject to Novation's right to conduct special audits whenever it deems it to be necessary to carry out the purposes of this agreement".

Page 18. Section 15. Books and Records; Facilities Inspections. 4/th/ sentence.


-After "will" add "reasonably".

Page 18. Section 17a. Nondisclosure. 1/st/ sentence.
-Change "Supplier agrees that it will:" to "Novation and Supplier agree to:"

Page 18. Section 17a. Nondisclosure. Subsection (1).
-Change "Novation, the Clients, and the Members;" to "the parties;".

Page 18. Section 17a. Nondisclosure. Subsection (2).


-Delete "Novation" add "the other;".

Page 19. Section 17a. Nondisclosure. Subsection (3).


-Delete "Novation" add "the other".

Page 19. Section 17a. Nondisclosure. Subsection (4).
-Change "return to Novation, the Client, or the Member, as the case may be, the" to read "both Will destroy or return to the other pertinent".

Page 19. Section 17c. Nondisclosure. Addition of Section.
-Add "Novation shall instruct the Members to keep confidential information related to prices."

Page 20. Section 18e. Miscellaneous - No Assignment. 1/st/ sentence.
- End of sentence, add "upon prior written notice."

Exhibit P. Other Information Requirements. End of First Paragraph.
- Add "Electronic commerce transactions will be conducted according to industry standards, when available.
- Remainder of Exhibit P is deleted in its entirety.


[***] Confidential treatment requested pursuant to a request for confidential treatment filed with the Securities and Exchange Commission. Omitted portions

have been filed separately with the Commission.


EXHIBIT 10.11

MANUFACTURING AGREEMENT

between

CMA INTERNATIONAL, INC.

and

NATUS MEDICAL, INC.

1

Confidential treatment has been requested for portions of this exhibit. The copy filed herewith omits the information subject to the confidentiality request. Omissions are designated as *****. A complete version of this exhibit has been filed separately with the Securities and Exchange Commission.


TABLE OF CONTENTS

                                                                          PAGE
ARTICLE  1 - DEFINITIONS.................................................  3

ARTICLE  2 - MANUFACTURING OF PRODUCT....................................  6

ARTICLE  3 - PRICE; PRICE ADJUSTMENTS.................................... 10

ARTICLE  4 - RECORDS..................................................... 11

ARTICLE  5 - TERM; TERMINATION........................................... 11

ARTICLE  6 - INDEMNIFICATION............................................. 15

ARTICLE  7 - FORCE MAJEURE............................................... 17

ARTICLE  8 - LEGAL COMPLIANCE; AUTHORIZATION............................. 18

ARTICLE  9 - PRESS RELEASES; USE OF NAMES................................ 18

ARTICLE 10 - DISPUTE RESOLUTIONS; VENUE.................................. 19

ARTICLE 11 - CONFIDENTIALITY............................................. 20

ARTICLE 12 - PROTECTION OF INTELLECTUAL PROPERTY......................... 21

ARTICLE 13 - MISCELLANEOUS............................................... 23

2

MANUFACTURING AGREEMENT

THIS MANUFACTURING AGREEMENT, is made effective as of this 3/rd/ day of December, 1998, by and between NATUS MEDICAL, INC. a corporation organized under the laws of the State of California and having a place of business at 1501 Industrial Road, San Carlos, California, 94070 ("Natus") and CMA INTERNATIONAL, INC., a corporation organized under the laws of the State of North Carolina and having a place of business at 100 Europa Drive, Suite 520, Chapel Hill, North Carolina 27514, on its own behalf and on behalf of any Affiliate entity or entities as defined herein ("CMA") (each individually a "Party" and collectively

                             ---                         -----
the "Parties").
     -------

WITNESSETH:

WHEREAS, Natus wishes to distribute commercially certain products; and

WHEREAS, CMA wishes to perform manufacturing, testing and quality assurance services for the manufacturing, of such products for sale to Natus; and

WHEREAS, Natus desires CMA to perform such services and sell such products to Natus, and CMA desires to perform such services and sell such product to Natus, all on the terms and conditions set forth in this Agreement;

NOW, THEREFORE, in consideration of the mutual covenants and promises set forth herein, the Parties agree as follows:

ARTICLE 1

DEFINITIONS

The following terms, whether used in the singular or plural, shall have the meanings assigned to them below for purposes of this Agreement:

3

1.1 "Affiliate" shall mean any corporation or non-corporate entity which controls, is controlled by, or is under common control with a Party, or with respect to CMA, which provides any Product-related service or component to CMA in connection with any activities contemplated by this Agreement to be performed. A corporation or non-corporate entity shall be regarded as in control of another corporation if it owns or directly or indirectly controls at least forty percent (40%) of the voting stock of the other corporation or (a) in the absence of the ownership of at least forty percent (40%) of the voting stock of a corporation or (b) in the case of a non-corporate entity, the power to direct or cause the direction of the management and policies of such corporation or non-corporate entity, as applicable, as such management and policies may relate to this Agreement.

1.2 "Agreement" shall mean this Manufacturing Agreement.

1.3 "Contract Year" shall mean the period of twelve (12) successive calendar months commencing on the Effective Date, and each successive twelve
(12) month period thereafter.

1.4 "Delivery Date" shall mean a date for which delivery of Product is stated in a purchase order.

1.5 "Effective Date" shall mean the date appearing at the beginning of this Agreement .

1.6 "Initial Term" shall have the meaning set forth in Section 5.1 hereof.

1.7 "Product" shall mean the specific item identified for manufacture in each Production Proposal, as described by the Product Specifications.

4

1.8 "Product Price" shall mean the Product price set forth in the Production Proposals attached hereto and made a part hereof, as such price may be amended from time to time during the Initial Term or any renewal term.

1.9 "Product Specification" shall mean the detailed description of the Product, including but not limited to specifications, drawings, assembly and test procedures, quality standards, and material standards, which will be attached hereto or referenced within Production Proposals and made a part hereof, as provided by Natus, as such Product Specifications may be amended from time.

1.10 "Production Proposal" shall mean an attachment hereto for each individual item to be manufactured for Natus by CMA. Each Proposal shall be accepted by both parties as defined in Article 2.

1.11 "Third Party" shall mean any party other than Natus, CMA and their respective Affiliates.

1.12 "Unit" shall mean a single Product.

1.13 "Transition Costs" shall mean the nonrecurring expenses associated with the transfer to CMA from Natus or commencement of the manufacture of a Product by CMA for Natus.

1.14 "Price Adjustment" shall mean changes to the Product Price as may be required from time to time as set forth in Section 3.2.

1.15 "Lead Time" shall mean the number of weeks that will elapse between the date that a Purchase Order is transmitted to CMA and the date that the Product is delivered by CMA.

5

ARTICLE 2

MANUFACTURING OF PRODUCT

2.1 Submission of Proposals. CMA may submit proposals or Natus may request that certain production be undertaken, at which time CMA may then submit a proposal. As a minimum the proposal shall include reference to the Product Specifications, the Product Price, the Transition Costs, and Price Adjustments associated with the specific product. Informal communications regarding draft proposals are appropriate.

2.2 Proposal Acceptance. Natus is under no obligation to accept any proposal in whole or in part. Acceptance of the proposal shall be indicated by the authorized signature of both parties appearing on the cover sheet of the proposal.

2.3 Proposal Tracking . Upon acceptance, Production Proposals shall be sequentially numbered to uniquely identify each proposal.

2.4 Proposal Modification. Either party may make suggestions for changes to the proposal at any time. The procedure for acceptance of modifications is the same as for the original proposal.

2.5 Transition of Production. The Parties have developed a plan for the transition of production of the Products to CMA that includes a detailed schedule of activities (the "Schedule") included in the Production Proposals. Each Party agrees to use its best, and commercially reasonable efforts to execute the tasks identified on the Schedule in a timely manner consistent with the terms of the Schedule .

2.6 Transition Costs. The Parties have agreed to share the cost of the transition of production to CMA as described in the Production Proposals.
6

2.7 Production. The Parties agree that all work required by this Agreement to be performed by CMA shall be performed solely by CMA or its Affiliate(s) who are the sole entities permitted and authorized by Natus to perform such work under this Agreement. CMA agrees to manufacture, assemble, and package for international shipping the Products in accordance with the Product Specifications set forth in the Production Proposals. Natus may review CMA's performance of the work under this Agreement, including development, fabrication and tests of the Products, the design of the tools used to produce them, and their operation. To review the work, Natus may visit the sites where CMA or CMA's Affiliate performs it. CMA shall make available by electronic or other means any information required by Natus to be obtained or maintained as relates to Products, including current data regarding status and performance on this Agreement.

2.8 Forecast Schedules. Natus shall deliver to CMA a forecast of Natus' Unit requirements for Products for each month during the first [***] period after the first Delivery Date. Such forecast shall thereafter be updated as required so that CMA shall have been provided with a [***] rolling forecast.

2.9 Forecast Variances. All forecasts under this Agreement and updates thereof shall be for the sole purpose of assisting CMA in its planning and will not constitute an obligation of Natus to purchase the quantities of Products indicated.

2.10 Purchase Orders. Except to the extent the parties may otherwise agree with respect to a particular shipment, the Products shall be ordered by Natus pursuant to written Purchase Orders, which shall be sent to CMA by Natus with the respective Proposal from Section 2.2 referenced with not less than the "lead time" prior to the Delivery Dates specified in such Purchase Orders. Upon receipt of each Purchase Order by CMA hereunder CMA shall


[***] Confidential treatment requested pursuant to a request for confidential treatment filed with the Securities and Exchange Commission. Omitted portions have been filed separately with the Commission.

7

supply the Products, in such quantities and shall deliver such Products to Natus by the Delivery Dates specified in such purchase order. CMA shall maintain in its inventory a safety stock of Products in an amount equal to
[***] percent [***] of the forecast set forth in Section 2.8 hereof for the next month to ensure Product availability.

2.11 Delivery Terms. The terms of delivery for the Products shall be
[***] CMA's facility located in the United Kingdom or Republic of Ireland. Products shall be suitably packaged by CMA in preparation for international shipment in packaging meeting Natus' requirements. Destination charges, transportation costs and any tariff associated with the Products shall be the responsibility of [***].

2.12 Lead Time. The lead time shall be as mutually agreed by the Parties in the Production Proposal and modified from time-to-time by mutual written agreement. CMA shall exert every effort to minimize the lead time.

2.13 Warranties by CMA. CMA warrants to Natus that the Products, at the time of sale and shipment to Natus or its designee by CMA, will conform to the Product Specifications, as then in effect, and be free from defects in material and workmanship under normal use and operation for a period of [***] months from the Delivery Date.

2.14 Government and Agency Requirements. CMA warrants that the manufacture of the Products meet all applicable worldwide government and independent agency requirements, standards and approvals as may be required by the government entities in the country of destination with respect to any Product. CMA makes no warranty that the Product Specifications meet all applicable government and independent agency requirements, standards, and approvals.

2.15 Disclaimer by CMA. EXCEPT AS SET FORTH IN SECTIONS 2.13 AND 2.14 CMA MAKES NO WARRANTY THAT THE PRODUCTS WILL BE MERCHANTALBE OR


[***] Confidential treatment requested pursuant to a request for confidential treatment filed with the Securities and Exchange Commission. Omitted portions have been filed separately with the Commission.

8

FIT FOR ANY PARTICULAR PURPOSE, NOR DOES CMA MAKE ANY OTHER WARRANTIES WITH RESPECT TO THE PRODUCTS, EXPRESS OR IMPLIED, EXCEPT AS EXPRESSLY STATED IN THIS AGREEMENT.

2.16 Product Specification Changes. In the event Natus changes the Product Specifications, Natus shall promptly advise CMA in writing of such changes, and CMA shall promptly advise Natus as to any scheduling and/or price adjustments which may result from such changes. Prior to implementation of such changes, the Parties agree to negotiate in good faith in an attempt to reach agreement on (a) the new price for any Product manufactured hereunder by CMA which embodies such changes, and (b) any other amendments to this Agreement which may be necessitated by such changes (i.e., an adjustment to the lead time for purchase

orders). Natus agrees to reimburse CMA for the reasonable, mutually agreed expenses incurred by CMA as a result of such changes, including, but not limited to, reimbursing CMA for its development costs, capital expenditure costs and costs for any components or other materials rendered unusable as a result of such changes.

2.17 Product Repair. Natus, its distributors, customers, or other designee may return Products to CMA that are determined by Natus to be defective in accordance with Article 2.7 hereof, or that need repair in accordance with this Article 2.17. Upon determination of any defective Product, Natus may request, and CMA shall issue, a "return authorization number" enabling Natus or the end- user to ship such Product on a freight-collect basis to CMA. CMA shall, at CMA's option, either replace or repair Products found to be defective during the Warranty period set forth in Article 2.13 with Products which conform to the Product Specifications which are part of this Agreement and in force at the time the defective Products were originally delivered. Products returned for defects in workmanship and/or materials during

9

the Warranty Period as set forth in Article 2.13 hereof will be repaired and shipped back to the appropriate destination at no charge to Natus. Repair of non-warranty and/or post-warranty Products shall be in accordance with Natus' instruction. Repair and shipping costs for Products returned for defects that are not the responsibility of CMA, including Products that have been improperly used and/or handled, non-warranty Products, and post-warranty Products, shall be paid by Natus. If the Products are returned to CMA, and CMA determines that said Products are not defective in any way, and Natus agrees with CMA's findings, Natus agrees to pay CMA a fixed amount to be negotiated between CMA and Natus (no defects found charge) for each such Product. CMA's warranty shall not apply to any defects caused by improper use, handling, or transportation, unless improperly packaged by CMA for delivery to Natus or its designee.

ARTICLE 3

PRICE: PRICE ADJUSTMENTS

3.1 Price. For all Product which is the subject of purchase orders submitted by Natus prior to or during the first Contract Year, Natus shall pay to CMA the Product Price set forth in the Production Proposals attached hereto, subject to adjustment as set forth in Section 3.2 hereof.

3.2 Price Adjustments. The Product Price may be adjusted by CMA for each year subsequent to the Effective Date (the "New Price Year") as set forth in the Production Proposals hereof.

3.3 Method of Payment. All payments due hereunder to CMA shall be sent to CMA at the times set forth by wire transfer of funds via the Federal Reserve Wire Transfer System to the account of CMA International, Inc. that CMA may designate to Natus in writing


[***] Confidential treatment requested pursuant to a request for confidential treatment filed with the Securities and Exchange Commission. Omitted portions have been filed separately with the Commission.

10

from time to time in accordance with Section 13.8 hereof. Natus shall notify the following person prior to the date of each wire transfer:

Richard M. West President
CMA International, Inc. 100 Europa Drive, Suite 520 Chapel Hill, NC 27514 Facsimile No.: 919-968-7829

The wire transfer shall be due net fifteen (15) days from the date of CMA's invoice during the first Contract Year and net thirty (30) days thereafter, which invoice will be sent out concurrently with shipment of Product.

ARTICLE 4

RECORDS

4.1 Records. CMA shall maintain all engineering, manufacturing, and inspection records, all records of shipments of the Products from CMA, and all records related to Product or facility regulations and certifications for the time periods required by applicable laws and regulations with respect to the Products. CMA shall make such records and data available for review and copying by Natus at CMA's (or its Affiliate's) facility upon reasonable prior notice from Natus to CMA. In addition, upon termination or expiration of this Agreement, whichever occurs first, CMA will upon Natus' request, make copies of such records and data for Natus.

ARTICLE 5

TERM: TERMINATION

5.1 Term. Unless sooner terminated pursuant to the terms hereof, the term

of this Agreement shall commence on the Effective Date and shall expire on the fifth anniversary of the Effective Date (the "Initial Term"). The Initial Term shall extend for one (1) additional year, if
11

prior to the fifth anniversary of the Effective Date, both Parties agree in writing that the Initial Term shall be so extended.

5.2 Termination and Agreement. This Agreement may be terminated at any time upon mutual written agreement between the Parties.

5.3 Termination for Default. This Agreement may be terminated by either Party in the event of the material breach or default by the other Party of the terms and conditions hereof; provided, however, the other Party shall first give to the defaulting Party, written notice of the proposed termination or cancellation of this Agreement, specifying the grounds therefor. Upon receipt of such notice, the defaulting Party shall have [***] to respond by curing such default (or [***] with respect to a failure by Natus to pay any amounts hereunder when due) or by delivering to the other Party a certificate that such breach is not capable of being cured within such time and that the breaching Party is working diligently to cure such breach, but in no event shall the time period for curing such breach exceed an additional [***]. If the breaching Party does not so respond or fails so to work diligently and to cure such breach within the additional time set forth above, then the other Party may either suspend the Agreement indefinitely or terminate the Agreement. Termination of this Agreement pursuant to this Section 5.3 shall not affect any other rights or remedies which may be available to the nondefaulting Party.

5.4 Bankruptcy; Insolvency. Either Party may terminate this Agreement upon the occurrence of either of the following:

(a) The entry of a decree or order for relief by a court having jurisdiction in the premises in respect of such Party in an involuntary case under the Federal Bankruptcy Code, as now constituted or hereafter amended, or any other applicable federal or state insolvency or


[***] Confidential treatment requested pursuant to a request for confidential treatment filed with the Securities and Exchange Commission. Omitted portions have been filed separately with the Commission.

12

other similar law in any applicable jurisdiction and the continuance of any such decree or order unstayed and in effect for a period of sixty (60) consecutive days; or

(b) The filing by such Party of a petition for relief under the Federal Bankruptcy Code, as now constituted or hereafter amended, or any other applicable federal or state insolvency or other similar law.

5.5 Acquisition of Merger of CMA. The parties agree that Natus is entering into this agreement in large part on the basis of the skills and expertise of the particular individuals who own and manage CMA. If the management of CMA is substantially altered or acquired (including any purchase or acquisition of the majority of CMA assets), or if any person or entity acquires forty-percent (40%) or more of the voting shares in CMA or otherwise acquires effective control over the management of CMA, Natus may immediately terminate this Agreement. In such event Natus shall have the rights stated in Section 5.6 of this Agreement.

5.6 Expiration; Termination; Consequences.

(a) Upon expiration or termination of this Agreement, whichever is sooner, (but in the case of termination, only if directed by the terminating Party in the notice of termination), CMA shall manufacture and ship, and Natus shall purchase in accordance with the provisions hereof, any and all amounts of Product ordered by Natus hereunder prior to the date on which such notice is given.

(b) Upon expiration or termination of this Agreement for any reason,
(i) Natus shall purchase from CMA and CMA shall sell at CMA's Acquisition Cost all usable inventories and materials reasonably acquired by CMA hereunder for the manufacture of or development of Product, (ii) Natus shall purchase from CMA and CMA shall sell all work-in-progress for the

13

Product at CMA's cost and (iii) Natus shall purchase and CMA shall sell all other finished Product then in CMA's possession.

(c) Upon expiration or termination of this agreement for any reason, CMA shall immediately and without delay release to the custody of Natus or Natus' designee all Product Specifications (in whatever form occurring, whether hard copy, magnetic or optical disk, etc.), all Natus-owned tooling, dies, molds, testing or manufacturing or other Natus equipment, together with either originals or validated copies of all testing, inspection, or other data regarding the performance or regulatory compliance of any Product sold to Natus hereunder, as well as any other property of Natus that is on the premises of CMA or any Affiliate, it being understood that all such items constitute Natus property that has been created by, or for the benefit of, Natus or, in the case of Natus-owned equipment, that a bailment has been created for such equipment, obligating CMA to return such equipment to Natus. In addition, CMA shall sell to Natus, at Natus' option, for a reasonable and mutually-agreeable price, any property or equipment owned by CMA or its Affiliates specifically and solely for the production of Natus' Products.

14

ARTICLE 6

INDEMNIFICATION

6.1 Indemnification by Natus. Except as otherwise provided in Section 6.2 below, Natus shall indemnify, defend and hold CMA, its Affiliates and their respective directors, officers, employees, agents, successors and assigns harmless from and against any damages, judgments, claims, suits, actions, liabilities, costs and expenses (including, but not limited to, reasonable attorneys' fees) arising out of or connected with (a) the design, use, handling, distribution, marketing or sale of the Products (except to the extent caused by CMA's negligent acts or omissions or willful misconduct in the procurement of components or in the manufacturing of the Products) or from any accident resulting from the use of the Products, (b) negligent acts, omissions, willful misconduct or any breach or default of any representation of Natus or any obligation on the part of Natus to be performed pursuant to this Agreement or any of its agents, contractors, employees or licensees, or (c) any proceeding instituted by or on behalf of a Third Party based upon a claim that the manufacture, use or sale of the Products infringes a United States patent or any other proprietary rights.

6.2 Indemnification by CMA. Except as otherwise provided in Section 6.1 above, CMA shall indemnify, defend and hold Natus, its Affiliates and their respective directors, officers, employees, agents, successors and assigns harmless from and against any damages, judgements, claims, suits, actions, liabilities, costs and expenses (including, but not limited to, reasonable attorneys' fees) resulting from (a) any Third Party claims or suits arising out of CMA's negligent acts or omissions or willful misconduct in the procurement of components or in the manufacture of the Products; or, (b) negligent acts, omissions, willful misconduct or any

15

breach or default of any representation of CMA or any obligation on the part of CMA to be performed pursuant to this Agreement or any of its agents, contractors, employees or licensees, provided, however, CMA's total liability under this Section 6.2 shall not exceed, in the aggregate, [***]

6.3 Indemnification Procedures. A Party (the "Indemnitee") which intends to claim indemnification under this Article 6 shall promptly notify the other Party (the "Indemnitor") in writing of any action, claim or other matter in respect of which the Indemnitee or any of its Affiliates, or any of their respective directors, officers, employees or agents intend to claim such indemnification; provided, however, the failure to provide such notice within a reasonable period of time shall not relieve the Indemnitor of any of its obligations hereunder except to the extent the Indemnitor is prejudiced by such failure. The Indemnitee shall permit, and shall cause its Affiliates, and their respective directors, officers, employees and agents to permit, the Indemnitor, at its discretion, to settle any such action, claim or other matter. The Indemnitee agrees to the complete control of such defense or settlement by the Indemnitor; provided, however, such settlement does not adversely affect the Indemnitee's rights hereunder or impose any obligations on the Indemnitee in addition to those set forth herein in order for it to exercise such rights. No such action, claim or other matter shall be settled without the prior written consent of the Indemnitor, and the Indemnitor shall not be responsible for any attorneys' fees or other costs incurred other than as provided herein. The Indemnitee, its Affiliates, and their respective directors, officers, employees and agents shall cooperate fully with the Indemnitor and its legal representatives in the investigation and defense of any action, claim or other matter covered by this indemnification. The Indemnitee shall have the right, but not the obligation, to be represented by counsel of its own selection and at its own expense.


[***] Confidential treatment requested pursuant to a request for confidential treatment filed with the Securities and Exchange Commission. Omitted portions have been filed separately with the Commission.

16

6.4 Survival of Indemnification Obligations. The provisions of this Article 6 shall survive the expiration or termination of this Agreement.

6.5 Disclaimer of Consequential Damages. IN NO EVENT SHALL EITHER PARTY BE LIABLE TO THE OTHER PARTY FOR INCIDENTAL, SPECIAL OR CONSEQUENTIAL DAMAGES, INCLUDING, BUT NOT LIMITED TO, ANY CLAIM FOR DAMAGES BASED UPON LOST PROFITS.

6.6 Insurance. Each Party shall maintain (a) general liability, and (b) product liability insurance coverage of at least [***] in each category to protect against such hazards as may or may not be anticipated. Proof of such insurance shall be produced upon request. CMA shall name Natus as an additional named insured under CMA's product liability insurance policy required under this Agreement to be maintained by CMA.

ARTICLE 7

FORCE MAJEURE

7.1 Effects of Force Majeure. Neither Party shall be held liable or responsible for failure or delay in fulfilling or performing any of its obligations under this Agreement in case such failure or delay is due to any condition beyond the reasonable control of the affected party including, without limitation, acts of God, strikes or other labor disputes, governmental regulations or actions, but excluding failure or delay caused by the affected Party's negligence or financial condition (a "Force Majeure Event). Such Party shall promptly resume performance hereunder as soon as practicable.

7.2 Notice of Force Majeure Event. Each Party agrees to give the other Party prompt written notice of the occurrence of any Force Majeure Event, the nature thereof, and the extent to which the affected Party will be unable fully to perform its obligations hereunder. Each Party


[***] Confidential treatment requested pursuant to a request for confidential treatment filed with the Securities and Exchange Commission. Omitted portions have been filed separately with the Commission.

17

further agrees to use commercially reasonable efforts to correct the Force Majeure Event as quickly as possible and to give the other Party prompt written notice when it is again fully able to perform such obligations.

ARTICLE 8

LEGAL COMPLIANCE: AUTHORIZATION

8.1 Legal Compliance. Each Party shall comply in all material respects with all federal, state, and local laws and regulations applicable to the conduct of its business pursuant to this Agreement.

8.2 Authorization. CMA hereby represents and warrants to Natus that all corporate action on the part of CMA and its officers and directors and Affiliates necessary for the authorization, execution and delivery of this Agreement and the performance of all obligations of CMA hereunder has been taken. Natus hereby represents and warrants to CMA that all requisite action on the part of Natus and its officers and directors necessary for the authorization, execution and delivery of this Agreement and the performance of all obligations of Natus hereunder has been taken.

ARTICLE 9

PRESS RELEASES: USE OF NAMES

9.1 Press Releases. Any press release, publicity or other form of public written disclosure related to this Agreement prepared by one Party shall be submitted to the other Party prior to release for approval.

9.2 Use of Names. Except as otherwise required by law or by the terms of this Agreement or mutually agreed upon by the Parties, neither Party shall make any use of the name

18

of the other Party or any trade name or trademark belonging to the other Party in any advertising or promotional material without the prior consent of the other Party, and no right or license to use, register or claim any other right in respect thereto is created by or implied by this Agreement.

ARTICLE 10

DISPUTE RESOLUTION: VENUE

10.1 Exclusions. Section 10.2 below shall not apply to any disputes arising under Article 6 hereof.

10.2 Dispute Resolution. The Parties recognize that a bona fide dispute as to certain matters may from time to time arise during the term of this Agreement which relates to either Party's rights and/or obligations hereunder. In the event of the occurrence of such a dispute, either Party may, by notice to the other Party, have such dispute referred to their respective officers designated below, or their successors, for attempted resolution by good faith negotiations within ten (10) days after such notice is received. Such designated officers are as follows:

For Natus - President

For CMA - President

In the event the designated officers are not able to resolve such dispute within such ten (10) day period, or such other period of time as the Parties may mutually agree in writing, each Party shall have the right to pursue any and all remedies available at law or in equity.

10.3 Venue. Any court proceeding initiated by one Party against the other Party with respect to this Agreement shall be commenced in a United States District Court in California and CMA consents to the personal and subject matter jurisdiction of such Court; provided, however,

19

if the court proceeding is brought as a third party action as part of a pending proceeding in a different venue, either Party may initiate such third party action against the other Party in such other venue.

ARTICLE 11

CONFIDENTIALITY

11.1 Definition. "Confidential Information" shall mean that information disclosed to CMA by Natus in the course of the term of this Agreement which relates to Natus' past, present, and future research, development, and business activities, and which has been identified to CMA as being the Confidential Information of Natus. The term "Confidential Information" shall not mean any information that is:

A. already in the possession of CMA and not furnished in confidence by Natus;

B. rightfully received from a third party without obligation of confidence;

C. independently developed by CMA;

D. now, or hereafter, becomes publicly available without breach of this Agreement; or

E. approved for release by written agreement of Natus.

11.3 Notice. When disclosed in writing, the information will be labeled as Confidential. When disclosed orally, such information will be identified as Confidential at the time of disclosure, with subsequent confirmation in writing referencing the date and type of information disclosed. CMA agrees to clearly label as Natus Confidential all information reduced to writing by CMA as a result of such oral disclosures. CMA also agrees to clearly label as

20

Natus Confidential all information prepared or developed by CMA for Natus and reduced to writing by CMA which is deliverable to Natus hereunder.

11.4 Duration. During the term of this agreement, and for a period of five years thereafter, CMA agrees to hold all such Confidential Information in trust and confidence for Natus and not to use such Confidential Information other than for the benefit of Natus. Except as may be authorized by Natus in writing, for such period of time, CMA agrees not to disclose any such Confidential Information, by publication or otherwise, to any person other than those persons whose services CMA requires who have a need to know such Confidential Information for purposes of carrying out the conditions of this Agreement, and who agree in writing to be bound by, and comply with the conditions of this Section. CMA shall return to Natus all Confidential Information upon request by Natus or upon termination or expiration of this Agreement.

11.5 Affiliates. The obligations and limitations of this Article 11 apply equally to any CMA Affiliates.

ARTICLE 12

PROTECTION OF INTELLECTUAL PROPERTY

12.1 Product Specifications. The Product Specifications which are a part of this Agreement are the sole and exclusive property of Natus and are to be used by CMA for the sole benefit of Natus in the performance of this Agreement.

12.2 Natus Property. It is acknowledged by the parties that the design of the Products

21

was developed under Natus' direction and at Natus' expense. Those features and processes as well as any other features and processess which may be subsequently developed under Natus' direction and at Natus' expense, are the proprietary and confidential designs of Natus, and are the sole and exclusive property of Natus. CMA agrees that all right, title and interest therein shall at all times vest in and remain in Natus. Nothing in this Agreement shall be construed as establishing, transferring, or otherwise conveying to CMA any rights, interest or license in such features and processes, whether by implication, estoppel or otherwise.

12.3 Identification. CMA will promptly identify any of its background Patents or applications which would be infringed by the manufacture, use or sale of any Product or process delivered to Natus in fulfillment of this Agreement.

12.4 Usage. All Natus drawings, documents and Product Specifications submitted, including but not limited to the Product design, shall remain the property of Natus. Their usage is authorized only for the performance of work for Natus.

12.5 Deliverables. All of the deliverable items arising out of work performed pursuant to this Agreement, and prepared for and submitted to Natus by CMA under this Agreement, shall belong exclusively to Natus and shall be prepared so as to be works made for hire according to Title 17 USC and CMA hereby assigns to Natus the ownership of copyright in the deliverable works and/or items and Natus shall have the right to obtain and hold in its own name copyrights, registrations and similar protection which may be available in the deliverable items. At Natus' request and expense, CMA shall execute assignments of ownership rights as required.

12.6 CMA Rights. CMA shall have no license or right, either expressly or by implication, estoppel or otherwise, to reproduce, display publish, prepare derivative works, use, sell, lease or otherwise transfer copies of the deliverable items arising out of work performed

22

pursuant to this Agreement, and prepared for and submitted to Natus by CMA under this Agreement and CMA shall deliver all copies of such works and/or items to Natus upon termination of this Agreement or before said termination upon Natus' written request.

12.7 [***]. For as long as [***] the [***] for [***] and for [***] thereafter [***] agrees [***] on the [***] of [***] for [***] other than [***] or its [***] other than [***] by [***].

ARTICLE 13

MISCELLANEOUS

13.1 Independent Contractors. The relationship between Natus and CMA is that of independent contractors and nothing herein shall be deemed to constitute the relationship of partners, joint venturers, nor of principal and agent between Natus and CMA. Neither Party shall have any express or implied right or authority to assume or create any obligations on behalf of or in the name of the other Party or to bind the other Party to any contract, agreement or undertaking with any Third Party.

13.2 Assignment. This Agreement may not be assigned or otherwise transferred by either party without the prior written consent of the other Party. Any purported assignment in violation of the preceding sentence shall be void. No assignment shall relieve either Party of responsibility for the performance of any obligation which accrued prior to the effective date of such assignment.

13.3 Continuing Obligations. Termination, assignment or expiration of this Agreement shall not relieve either Party from full performance of any obligations incurred prior thereto.


[***] Confidential treatment requested pursuant to a request for confidential treatment filed with the Securities and Exchange Commission. Omitted portions have been filed separately with the Commission.

23

13.4 Waiver. Neither Party's waiver of any breach or failure to enforce any of the terms and conditions of this Agreement, at any time, shall in any way affect, limit or waive such Party's right thereafter to enforce and compel strict compliance with every term and condition of this Agreement.

13.5 Severability. Each Party hereby expressly agrees that it has no intention to violate any public policy, statutory or common laws, rules, regulations, treaty or decision of any government agency or executive body thereof of any country or community or association of countries; that if any word, sentence, paragraph, clause or combination thereof in this Agreement is found by a court or executive body with judicial powers having jurisdiction over this Agreement or either Party hereto, in a final unappealed order, to be in violation of any such provisions in any country or community or association of countries, such words, sentences, paragraphs, clauses or combination shall be inoperative in such country or community or association of countries and the remainder of this Agreement shall remain binding upon the Parties, so long as enforcement of the remainder does not violate the Parties' overall intentions in this transaction.

13.6 Headings. The headings in this Agreement are for convenience of reference only and shall not affect its interpretation.

13.7 Exhibits. All exhibits, Production Proposals, and Purchase Orders referred to herein form an integral part of this Agreement and are incorporated into this Agreement by such reference.

13.8 Notices. All notices and other communications required or permitted to be given under this Agreement shall be in writing and shall be delivered personally or sent by (a) registered or certified mail, return receipt requested, (b) a nationally-recognized courier

24

service guaranteeing next-day delivery, charges prepaid or (c) facsimile (with the original promptly sent by any of the foregoing manners), and shall be deemed to have been given upon mailing or upon transmission by facsimile, as the case may be. Any such notices shall be addressed to the receiving Party at such Party's address set forth below, or at such other address as may from time to time be furnished by similar notice by either Party:

If to CMA:                 CMA International, Inc.
                           100 Europe Drive, Suite 520
                           Chapel Hill, NC 27514
                           Attn: Richard M. West
                           Facsimile No.: 919-968-7829

                           With a copy of legal notices to:
                           Byron B. Kirkland, Esq.
                           Smith, Anderson, Blount, Dorsett,
                            Mitchell & Jernigan, L.L.P.
                           P.O. Box 2611
                           Raleigh, NC 27602-2611
                           Facsimile No. 919-821-6800

If to Natus:               Natus Medical, Inc.
                           1501 Industrial Road
                           San Carlos, California 94070
                           Attn:  President
                           Facsimile No. 650-802-0401

                           With a copy of legal notices to:
                           Corporate Secretary

13.9 Authorization. Production Proposals must be signed by the President of both Parties or their designee as mutually agreed by the Parties.

13.10 Counterparts. This Agreement and any amendment or supplement hereto may be executed in any number of counterparts and any Party hereto may execute any such counterpart, each of which when executed and delivered shall be deemed to be an original and all of which counterparts taken together shall constitute but one and the same instrument. The

25

execution of this Agreement and any such amendment or supplement by any Party hereto will not become effective until counterparts hereof have been executed by both Parties hereto.

13.11 Governing Law: Entire Agreement. The validity, interpretation and performance of this Agreement shall be governed and construed in accordance with the laws of the State of California without regard to the conflicts of laws provisions thereof. This document constitutes the full understanding of the Parties and a complete and exclusive statement of the terms of their agreement. No terms, conditions, understanding, or agreement purporting to modify or vary the terms of this Agreement shall be binding unless hereafter made in writing and signed by the party to be bound. No modification to this Agreement shall be effected by the acknowledgment or acceptance of any purchase order or shipping instruction forms or similar documents containing terms or conditions at variance with or in addition to those set forth herein.

13.12 Time of the Essence. Time is of the essence in respect to all provisions of this Agreement in which a time for performance is specified.

IN WITNESS WHEREOF, the Parties have caused this Agreement to be executed by their respective duly authorized representatives as of the day and year first above written.

CMA INTERNATIONAL, INC.

By:  /s/ Richard M. West
     -----------------------------
     Name:   Richard M. West
     Title:  President

Date: /s/ December 3, 1998
     -----------------------------

NATUS MEDICAL, INC.

By:  /s/  Tim C. Johnson
     -----------------------------
     Name:   Tim C. Johnson
     Title:  President

Date:  December 3, 1998
     -----------------------------

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EXHIBIT 10.12

COMMERCIAL LEASE AND DEPOSIT RECEIPT

AGENCY RELATIONSHIP CONFIRMATION. The following agency relationship is hereby
[_] confirmed for this transaction and supersedes any prior agency election:

LISTING AGENT: N/A is the agent of (check one):
(Print Firm Name)

[_] The Lessor exclusively; or [_] both the Lessee and the Lessor.

LEASING AGENT N/A (if not the same the Listing

Agent) is the agent of (Check one):

(Print Firm Name)

[_] the Lessee exclusively; or [_] the Lessor exclusively; or [_] both the Lessee and the Lessor.

Note: This confirmation DOES NOT take the place of the AGENCY DISCLOSURE form which may be required by law.

RECEIVED FROM NATUS MEDICAL INC. , hereinafter referred to as

LESSEE, the sum of $5,310.00 (FIVE THOUSAND THREE HUNDRED TEN DOLLARS dollars), evidenced by ______________________, as a deposit which will belong to Lessor and will be applied as follows:

                                                                                            BALANCE DUE
                                                                                             PRIOR TO
                                                                 TOTAL       RECEIVED        OCCUPANCY
Rent for the period from ________ to __________ ............   $1,770.00    $1,770.00       $__________
Security deposit (not applicable toward last month's rent)..   $1,770.00    $1,770.00       $__________
Other.......................................................   $1,770.00    $1,770.00       $__________
TOTAL.......................................................   $5,310.00    $5,310.00       $__________

In the event this Lease is not accepted by the Lessor within-1-days, the total deposit received will be refunded.

Lessee offers to lease from Lessor the premises situated in the City of REDDING, County of SHASTA State of CALIFORNIA described as 2865 CHURN CREEK RD, SUITE "A" consisting of approximately ________ square feet, upon the following terms and conditions:

1. TERM. The term will commence on (date) September 1, 2000, and end on (date) December 31, 2001

2. RENT. The total rent will be $_____, payable at $1,770.00 per month (based on first year's rates) payable on the 5th day of each month. All rents will be paid to Lessor or his or her authorized agent, at the following address: 2865 CHURN CREEK RD., SUITE "D", REDDING, CA 96002 or at such other places as may be designated by Lessor from time to time. In the event rent is not paid within ____ days after due date, Lessee agrees to pay a late charge of $50.00 plus interest at -0-% per annum on the delinquent amount. Lessee further agrees to pay $_____ for each dishonored bank check. The late charge period is not a grace period, and Lessor is entitled to make written demand for any rent if not paid when due.

3. USE. The premises are to be used for the operation of MEDICAL EQUIPMENT SERVICE CENTER, and for no other purpose, without prior written consent of Lessor. Lessee will not commit any waste upon the premises, or any nuisance or act which may disturb the quiet enjoyment of any tenant in the building.

4. USES PROHIBITED. Lessee will not use any portion of the premises for purposes other than those specified. No use will be made or permitted to be made upon the premises, nor acts done, which will increase the existing rate of insurance upon the property, or cause cancellation of insurance policies covering the property. Lessee will not conduct or permit any sale by auction on the premises.

5. ASSIGNMENT AND SUBLETTING. Lessee will not assign this Lease or sublet any portion of the premises without prior written consent of the Lessor, which will not be unreasonably withheld. Any such assignment or subletting without consent will be void and, at the option of the Lessor, will terminate this Lease.

6. ORDINANCES AND STATUTES. Lessee will comply with all statutes, ordinances, and requirements of all municipal, state and federal authorities not in force, or which may later be in force, regarding the use of the premises. The commencement or pendency of any state or federal court abatement proceeding affecting the use of the premises will, at the option of the Lessor, be deemed a breach of this Lease.

7. MAINTENANCE, REPAIRS, ALTERATIONS. Unless otherwise indicated, Lessee acknowledges that the premises are in good order and repair. Lessee will, at his or her own expense, maintain the premises in a good and safe condition, including plate glass, electrical wiring, plumbing and heating and air conditioning installations, and any other system or equipment. The premises will be surrendered, at termination of the Lease, in as good condition as received, normal wear and tear excepted. Lessee will be responsible for all repairs required, except the following which will be maintained by Lessor: roof, exterior walls, structural foundations (including any retrofitting required by governmental authorities) and:
H.V.A.C. Lessee [_] will, [X] will not maintain the property adjacent to the premises, such as sidewalks, driveways, lawns, and shrubbery, which would otherwise be maintained by Lessor.

No improvement or alteration of the premises will be made without the prior written consent of the Lessor. Prior to the commencement of any substantial repair, improvement, or alteration, Lessee will give Lessor at least two (2) days written notice in order that Lessor may post appropriate notices to avoid any liability for liens.

Lessee [___] [___] has read this page.

CAUTION: The copyright laws of the United States forbid the unauthorized reproduction of this form by any means including scanning or computerized formats.

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Property Address: 2865 "A" CHURN CREED RD, REDDING, CA 96002

8. ENTRY AND INSPECTION. Lessee will permit Lessor or Lessor's agents to enter the premises at reasonable times and upon reasonable notice for the purpose of inspecting the premises, and will permit Lessor, at any time within sixty (60) days prior to the expiration of this Lease, to place upon the premises any usual "For Lease" signs, and permit persons desiring to lease the premises to inspect the premises at reasonable times.

9. INDEMNIFICATION OF LESSOR. Lessor will not be liable for any damage or injury to Lessee, or any other person, or to any property, occurring on the premises. Lessee agrees to hold Lessor harmless from any claims for damages arising out of Lessee's use of the premises, and to indemnify Lessor for any expense incurred by Lessor in defending any such claims.

10. POSSESSION. If Lessor is unable to deliver possession of the premises at the commencement date set forth above, Lessor will not be liable for any damage caused by the delay, nor will this Lease be void or voidable, but Lessee will not be liable for any rent until possession is delivered. Lessee may terminate this Lease if possession is not delivered within 20 days of the commencement term in Item 1.

11. LESSEE'S INSURANCE. Lessee, at his or her expense, will maintain plate glass, public liability, and property damage insurance insuring Lessee and Lessor within minimum coverage as follows: 1,000,000 Lessee will provide Lessor with a Certificate of Insurance showing Lessor as additional insured. The policy will require ten (10) day's written notice to lessor prior to cancellation or material change of coverage.

12. LESSOR'S INSURANCE. Lessor will maintain hazard insurance covering one hundred percent (100%) actual cash value of the improvements throughout the Lease term. Lessor's insurance will not insure Lessee's personal property, leasehold improvements, or trade fixtures.

13. SUBROGATION. To the maximum extent permitted by insurance policies which may be owned by the parties, Lessor and Lessee waive any and all rights of subrogation against each other which might otherwise exist.

14. UTILITIES. Lessee agrees that he or she will be responsible for the payment of all utilities, including water, gas, electricity, heat and other services delivered to the premises, except: N/A

15. SIGNS. Lessee will not place, maintain, nor permit any sign or awning on any exterior door, wall, or window of the premises without the express written consent of Lessor, which will not be unreasonably withheld, and of appropriate governmental authorities.

16. ABANDONMENT OF PREMISES. Lessee will not vacate or abandon the premises at any time during the term of this Lease. If Lessee does abandon or vacate the premises, or is dispossessed by process of law, or otherwise, any personal property belonging to Lessee left on the premises will be deemed to be abandoned, at the option of Lessor.

17. CONDEMNATION. If any part of the premises is condemned for public use, and a part remains which is susceptible of occupation by Lessee, this Lease will, as to the part taken, terminate as of the date the condemnor acquires possession. Lessee will be required to pay such proportion of the rent for the remaining term as the value of the premises remaining bears to the total value of the premises at the date of condemnation; provided, however, that either party may, at his or her option, terminate this Lease as of the date the condemnor acquires possession. In the event that the premises are condemned in whole, or the remainder is not susceptible for use by the Lessee, this Lease will terminate upon the date which the condemnor acquires possession. All sums which may be payable on account of any condemnation will belong solely to the Lessor; except that Lessee will be entitled to retain any amount awarded to him or her for his or her trade fixtures and moving expenses.

18. TRADE FIXTURES. Any and all improvements made to the premises during the term will belong to the Lessor, except trade fixtures of the Lessee. Lessee may, upon termination, remove all his or her trade fixtures, but will pay for all costs necessary to repair any damage to the premises occasioned by the removal.

19. DESTRUCTION OF PREMISES. In the event of a partial destruction of the premises during the term, from any cause except acts or omission of Lessee, Lessor will promptly repair the premises, provided that such repairs can be reasonably made within sixty (60) days. Such partial destruction will not terminate this Lease, except that Lessee will be entitled to a proportionate reduction of rent while such repairs are being made, based upon the extent to which the making of such repairs interferes with the business of lessee on the premises. If the repairs cannot be made within sixty (60) days, this Lease may be terminated at the option of either party by giving written notice to the other party within sixty (60) day period.

20. HAZARDOUS MATERIALS. Lessee will not use, store, or dispose of any hazardous substances upon the premises, except the use and storage of such substances that are customarily used in Lessee's business, and are in compliance with all environmental laws. Hazardous substances means any hazardous waste, substance or toxic materials regulated under any environmental laws or regulations applicable to the property. Lessee will be responsible for the cost of removal of any toxic contamination caused by lessee's use of the premises.

21. INSOLVENCY. The appointment of a receiver, an assignment for the benefits of creditors, or the filing of a petition in bankruptcy by or against Lessee, will constitute a breach of this Lease by Lessee.

22. DEFAULT. In the event of any breach of this Lease by Lessee, Lessor may, at his or her option, terminate the Lease and recover from Lessee: (a) the worth at the time of award of the unpaid rent which had been earned at the time of termination; (b) the worth at the time of award of the amount by which the unpaid rent which would have been earned after termination until the time of the award exceeds the amount of such rental loss that the Lessee proves could have been reasonably avoided; (c) the worth at the time of

Lessee [___] [___] has read this page. [LOGO OMITTED]

CAUTION: The copyright laws of the United States forbid the unauthorized reproduction of this form by any means including scanning or computerized formats.

Page 2 of 4

Property Address: 2685 "A" CHURN CREED RD, REDDING CA.

award of the amount by which the unpaid rent for the balance of the term after the time of award exceeds the amount of such rental loss that the Lessee proves could be reasonably avoided; and (d) any other amount necessary to compensate Lessor for all the detriment proximately caused by the Lessee's failure to perform his or her obligations under the Lease or which in the ordinary course of things would be likely to result therefrom.

Lessor may, in the alternative, continue this Lease in effect, as long as Lessor does not terminate Lessee's right to possession, and Lessor may enforce all of Lessor's rights and remedies under the Lease, including the right to recover the rent as it becomes due under the Lease. If said breach of lease continues, Lessor may, at any time thereafter, elect to terminate the Lease.

These provisions will not limit any other rights or remedies which Lessor may have.

23. SECURITY. The security deposit will secure the performance of the Lessee's obligations. Lessor may, but will not be obligated to, apply all or portions of the deposit on account of Lessee's obligations. Any balance remaining upon termination will be returned to Lessee. Lessee will not have the right to apply the security deposit in payment of the last month's rent.

24. DEPOSIT REFUNDS. The balance of all deposits will be refunded within three
(3) weeks (or as otherwise required by law), from date possession is delivered to Lessor or his or her authorized agent, together with a statement showing any charges made against the deposits by Lessor.

25. ATTORNEY FEES. In any action or proceeding involving a dispute between Lessor and Lessee arising out of this Lease, the prevailing party will be entitled to reasonable attorney fees.

26. WAIVER. No failure of Lessor to enforce any term of this Lease will be deemed to be a waiver.

27. NOTICES. Any notice which either party may or is required to give, will be given by mailing the notice, postage prepaid, to Lessee at the premises, or to Lessor at the address shown in Item 2, or at such other places as may be designated in writing by the parties from time to time. Notice will be effective five (5) days after mailing, or on personal delivery, or when receipt is acknowledged in writing.

28. HOLDING OVER. Any holding over after the expiration of this Lease, with the consent of Owner, will be a month-to-month tenancy at a monthly rent of $1,770.00, payable in advance and otherwise subject to the terms of this Lease, as applicable, until either party will terminate the tenancy by giving the other party thirty (30) days written notice.

29. TIME. Time is of the essence of this Lease.

30. HEIRS, ASSIGNS, SUCCESSORS. This Lease is binding upon and inures to the benefit of the heirs, assigns, and successors of the parties.

31. TAX INCREASE. In the event there is any increase during any year of the term of this Lease in real estate taxes over and above the amount of such taxes assessed for the tax year during which the term of this Lease commences, Lessee will pay to Lessor an amount equal to N/A % of the increase in taxes upon the land and building in which the leased premises are situated. In the event that such taxes are assessed for a tax year extending beyond the term of the Lease, the obligation of Lessee will be prorated. Lessee will not be responsible for any tax increase occasioned solely by a sale or transfer of the premises by Lessor.

32. COST OF LIVING INCREASE. The rent provided for in Item 2 will be adjusted effective upon the first day of the month immediately following the expiration of 12 months from date of commencement of the term, and upon the expiration of each 12 months thereafter, in accordance with changes in the U.S. Consumer Price Index for [X] All Urban Consumers (1982-84 = 100), or
[_] (other index) ____________ ("CPI"). The monthly rent will be increased to an amount equal to the monthly rent set forth in Item 2, multiplied by a fraction the numerator of which is the CPI for the second caldndar month immediately preceding the adjustment date, and the denominator of which is the CPI for the second calendar month preceding the commencement of the Lease term; provided, however, that the monthly rent will not be less than the amount set forth in Item 2.

33. OPTION TO RENEW. Provided that Lessee is not in default in the performance of this Lease, Lessee will have the option to renew the Lease for an additional term of N/A months commencing at the expiration o the initial Lease term. All of the terms and conditions of the Lease will apply during the renewal term, except that the monthly rent will be the sum of $N/A which will be adjusted after commencement of the renewal term in accordance with the cost of living increase provision set forth in Item 32.

The option will be exercised by written notice given to Lessor not less than 120 days prior to the expiration of the initial Lease term. If notice is not given within the time specified, this Option will expire.

34. AMERICANS WITH DISABILITIES ACT. The parties are alerted to the existence of the Americans With Disabilities Act, which may require costly structural modifications. The parties are advised to consult with a professional familiar with the requirements of the Act.

35. LESSOR'S LIABILITY. In the event of a transfer of Lessor's title or interest to the property during the term of this Lease, Lessee agrees that the grantee of such title or interest will be substituted as the Lessor under this Lease, and the original Lessor will be released of all further liability; provided, that all deposits will be transferred to the grantee.

36. ESTOPPEL CERTIFICATE.

(a) On ten (10) days' prior written notice from Lessor, Lessee will execute, acknowledge, and deliver to Lessor a statement in writing: [1] certifying that this Lease is unmodified and in full force and effect (or, if modified, stating the nature of such modification and certifying that this Lease, as so modified, is in full force and effect), the amount of any security deposit, and the date to which the rent and other charges are paid in advance, if any; and [2] acknowledging that there are not, to Lessee's knowledge, any uncured defaults

Lessee [___] [___] has read this page.

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Property Address: 2685 "A" CHURN CREED RD, REDDING CA. 96002

on the part of Lessor, or specifying such defaults if any are claimed. Any such statement may be conclusively relied upon by any prospective buyer or encumbrancer of the premises.

(b) At Lessor's option, Lessee's failure to deliver such statement within such time will be a material breach of this Lease or will be conclusive upon Lessee: [1] that this Lease is in full force and effect, without modification except as may be represented by Lessor; [2] that there are no uncured defaults in Lessor's performance; and [3] that not more than one month's rent has been paid in advance.

(c) If Lessor desires to finance, refinance, or sell the premises, or any part thereof, Lessee agrees to deliver to any lender or buyer designated by Lessor such financial statements of Lessee as may be reasonably required by such lender or buyer. All financial statements will be received by the Lessor or the lender or buyer in confidence and will be used only for the purposes set forth.

37. ENTIRE AGREEMENT. The foregoing constitutes the entire agreement between the parties and may be modified only in writing signed by all parties. The following exhibits are a part of this Lease:

Exhibit A:____________________________________________________________ Exhibit B:____________________________________________________________ Exhibit C:____________________________________________________________

38. ADDITIONAL TERMS AND CONDITIONS. Lessor agrees to build 1 lunchroom and 1 office. Lessor will supply window coverings on doors and windows.

The undersigned Lessee acknowledges that he or she has thoroughly read and approved each of the provisions contained in this Offer, and agrees to the terms and conditions specified.

Lessee Thomas M. Waugh Date 8/4/00 Lessee________________ Date______

Receipt for deposit acknowledged by ________________________ _____ Date______

Lessor /s/ [ILLEGIBLE]^^ Date 7/26/00     Lessor /s/ [ILLEGIBLE]^^  Date 7/26/00
       -----------------      -------            -----------------       -------
         CONCEPT DEVELOPMENT CORP                C.D.C. - VICE PRESIDENT
         PRESIDENT

Lessee acknowledges receipt of a copy of the accepted Lease on (date) 8/7/00
[______] [______] ------


(Initials)


Rev. by________________ Date___________________
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Exhibit 21.1

SUBSIDIARIES

                                          Jurisdiction of
      Name                                 Incorporation
      ----                                ---------------


Natus Japan K. K.                              Japan


Exhibit 23.1

INDEPENDENT AUDITORS' CONSENT AND REPORT ON SCHEDULE

To the Board of Directors and Shareholders of Natus Medical Incorporated:

We consent to the use in this Registration Statement of Natus Medical Incorporated on Form S-1 of our report dated March 10, 2000 (August 16, 2000 as to Note 14), appearing in the Prospectus, which is a part of this Registration Statement, and to the reference to us under the heading "Experts" in such Prospectus.

Our audits of the financial statements referred to in our aforementioned report also included the financial statement schedule of Natus Medical Incorporated, listed in Item 16(b). This financial statement schedule is the responsibility of the Company's management. Our responsibility is to express an opinion based on our audits. In our opinion, such financial statement schedule, when considered in relation to the basic financial statements taken as a whole, presents fairly in all material respects the information set forth therein.

Deloitte & Touche LLP

San Jose, California

August 18, 2000


ARTICLE 5
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FORM THE BALANCE SHEETS AS OF JUNE 30, 2000 AND DECEMBER 31, 1999 AND THE STATEMENTS OF OPERATIONS FOR THE SIX MONTHS ENDED JUNE 30, 2000 AND THE YEAR ENDED DECEMBER 31, 1999 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
MULTIPLIER: 1,000


PERIOD TYPE 6 MOS YEAR
FISCAL YEAR END DEC 31 2000 DEC 31 1999
PERIOD START JAN 01 2000 JAN 01 1999
PERIOD END JUN 30 2000 DEC 31 1999
CASH 1,510 2,087
SECURITIES 295 289
RECEIVABLES 3,559 3,329
ALLOWANCES 225 201
INVENTORY 1,799 1,253
CURRENT ASSETS 7,195 6,897
PP&E 2,931 3,298
DEPRECIATION 1,592 2,021
TOTAL ASSETS 9,059 8,699
CURRENT LIABILITIES 3,336 3,083
BONDS 0 0
PREFERRED MANDATORY 24,534 23,842
PREFERRED 0 0
COMMON 1,824 278
OTHER SE (20,635) (18,504)
TOTAL LIABILITY AND EQUITY 9,059 8,699
SALES 11,009 19,783
TOTAL REVENUES 11,009 19,783
CGS 3,908 6,624
TOTAL COSTS 3,908 6,624
OTHER EXPENSES 7,430 12,525
LOSS PROVISION 24 63
INTEREST EXPENSE (12) (20)
INCOME PRETAX (317) 654
INCOME TAX 0 10
INCOME CONTINUING (317) 644
DISCONTINUED 0 0
EXTRAORDINARY 0 0
CHANGES 0 0
NET INCOME (317) 644
EPS BASIC (0.11) (0.17)
EPS DILUTED (0.11) (0.17)