Table of Contents

 
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
______________________________________ 
Form 10-Q
þ
QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the quarterly period ended March 31, 2015
or
o
TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the transition period from             to            
Commission File Number: 000-29089
Agenus Inc.
(exact name of registrant as specified in its charter)
Delaware
 
06-1562417
(State or other jurisdiction of
incorporation or organization)
 
(I.R.S. Employer
Identification No.)
3 Forbes Road, Lexington, Massachusetts 02421
(Address of principal executive offices, including zip code)
Registrant’s telephone number, including area code:
(781) 674-4400

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes   þ     No   o
Indicate by check mark whether the registrant has submitted electronically and posted on its corporate website, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulations S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).  Yes   þ     No   o
Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer,” and “smaller reporting company” in Rule 12b-2 of the Exchange Act.
Large accelerated filer   o          Accelerated filer   þ         Non-accelerated filer   o         Smaller reporting company   o
          (Do not check if a smaller reporting company)
Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    Yes   o     No   þ
Number of shares outstanding of the issuer's Common Stock as of April 27, 2015 : 71,485,732 shares
 


Table of Contents

Agenus Inc.
Three Months Ended March 31, 2015
Table of Contents  

 
 
Page
PART I
 
ITEM 1.
 
 
 
 
 
ITEM 2.
ITEM 3.
ITEM 4.
 
 
 
PART II
 
ITEM 1A.
ITEM 2.
ITEM 6.
 



Table of Contents

PART I - FINANCIAL INFORMATION
Item 1.
Financial Statements
AGENUS INC. AND SUBSIDIARIES
CONDENSED CONSOLIDATED BALANCE SHEETS
(Unaudited)
 
March 31, 2015
 
December 31, 2014
ASSETS
 
 
 
Cash and cash equivalents
$
79,304,207

 
$
25,714,519

Short-term investments

 
14,509,570

Inventories
88,200

 
95,700

Accounts Receivable
2,533,668

 
463,007

Prepaid expenses
2,480,448

 
1,247,548

Other current assets
747,437

 
639,957

Total current assets
85,153,960

 
42,670,301

 
 
 
 
Plant and equipment, net of accumulated amortization and depreciation of $28,676,061 and $28,369,982 at March 31, 2015 and December 31, 2014, respectively
5,879,575

 
5,996,687

Goodwill
18,268,662

 
17,869,023

Acquired intangible assets, net of accumulated amortization of $609,846 and $462,248 at March 31, 2015 and December 31, 2014, respectively
6,815,169

 
6,773,722

Other long-term assets
1,206,932

 
1,216,795

Total assets
$
117,324,298

 
$
74,526,528

LIABILITIES AND STOCKHOLDERS’ EQUITY
 
 

Current portion, long-term debt
$
423,838

 
$
1,257,178

Current portion, deferred revenue
9,586,244

 
184,421

Accounts payable
3,972,920

 
1,710,946

Accrued liabilities
6,253,883

 
5,501,527

Other current liabilities
762,088

 
575,351

Total current liabilities
20,998,973

 
9,229,423

 
 
 


Other long-term debt
11,078,526

 
4,769,359

Deferred revenue
17,243,611

 
3,009,568

Contingent royalty obligation
14,800,000

 
15,279,000

Contingent purchase price consideration
3,958,000

 
16,420,300

Other long-term liabilities
2,986,004

 
2,800,491

Commitments and contingencies


 

STOCKHOLDERS’ EQUITY
 
 

Preferred stock, par value $0.01 per share; 5,000,000 shares authorized:
 
 
 
Series A-1 convertible preferred stock; 31,620 shares designated, issued, and outstanding at March 31, 2015 and December 31, 2014; liquidation value of $32,063,092 at March 31, 2015
316

 
316

Common stock, par value $0.01 per share; 140,000,000 shares authorized; 70,836,180 and 62,720,065 shares issued at March 31, 2015 and December 31, 2014, respectively
708,362

 
627,201

Additional paid-in capital
756,804,409

 
715,667,633

Accumulated other comprehensive loss
(1,206,099
)
 
(1,970,420
)
Accumulated deficit
(710,047,804
)
 
(691,306,343
)
Total stockholders’ equity
46,259,184

 
23,018,387

Total liabilities and stockholders’ equity
$
117,324,298

 
$
74,526,528

See accompanying notes to unaudited condensed consolidated financial statements.

2

Table of Contents

AGENUS INC. AND SUBSIDIARIES
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS
(Unaudited)
 
 
Three Months Ended March 31,
 
2015
 
2014
Revenue:
 
 
 
Research and development revenue
3,953,299

 
720,856

Total revenues
3,953,299

 
720,856

Operating expenses:
 
 
 
Research and development
(9,220,143
)
 
(4,472,533
)
General and administrative
(5,487,109
)
 
(5,163,493
)
Contingent purchase price consideration fair value adjustment
(7,537,700
)
 
(909,000
)
Operating loss
(18,291,653
)
 
(9,824,170
)
Other (expense) income:
 
 
 
Non-operating (expense) income
(52,945
)
 
9,822,466

Interest expense, net
(396,863
)
 
(355,809
)
Net loss
(18,741,461
)
 
(357,513
)
Dividends on Series A-1 convertible preferred stock
(50,620
)
 
(51,026
)
Net loss attributable to common stockholders
$
(18,792,081
)
 
$
(408,539
)
Per common share data:
 
 
 
Basic and diluted net loss attributable to common stockholders
$
(0.28
)
 
$
(0.01
)
Weighted average number of common shares outstanding:
 
 
 
       Basic and diluted
66,667,290

 
50,556,807

 
 
 
 
Other comprehensive income (loss):
 
 
 
  Foreign currency translation gain
$
764,321

 
$
215,417

Other comprehensive income
764,321

 
215,417

Comprehensive loss
$
(18,027,760
)
 
$
(193,122
)

See accompanying notes to unaudited condensed consolidated financial statements.


3

Table of Contents

AGENUS INC. AND SUBSIDIARIES
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
(Unaudited)
 
 
Three Months Ended March 31,
 
 
2015
 
2014
 
Cash flows from operating activities:
 
 
 
 
Net loss
$
(18,741,461
)
 
$
(357,513
)
 
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
 
 
 
 
Depreciation and amortization
445,497

 
266,528

 
Share-based compensation
1,492,791

 
953,836

 
Non-cash interest expense
203,347

 
153,146

 
Loss on disposal of assets

 
1,150

 
       Change in fair value of contingent obligations
7,058,700

 
(8,894,974
)
 
       Loss on extinguishment of debt
154,117

 

 
Changes in operating assets and liabilities:
 
 
 
 
Accounts receivable
(2,055,256
)
 
1,200

 
Inventories
7,500

 

 
Prepaid expenses
(973,812
)
 
(279,825
)
 
Accounts payable
2,273,733

 
184,008

 
Deferred revenue
23,635,860

 
(688,904
)
 
Accrued liabilities and other current liabilities
724,760

 
(1,433,230
)
 
Other operating assets and liabilities
(10,930,439
)
 
(29,768
)
 
Net cash provided by (used in) operating activities
3,295,337

 
(10,124,346
)
 
Cash flows from investing activities:
 
 
 
 
Cash acquired in acquisition

 
514,470

 
Purchases of plant and equipment
(323,552
)
 
(172,592
)
 
Proceeds from sale of available-for-sale securities
14,534,486

 

 
Net cash provided by investing activities
14,210,934

 
341,878

 
Cash flows from financing activities:
 
 
 
 
Net proceeds from sale of equity
35,000,000

 
56,667,252

 
Proceeds from employee stock purchases and option exercises
1,108,906

 
84,271

 
Financing of plant and equipment

 
(9,505
)
 
Proceeds from issuance of long-term debt
9,000,000

 

 
Payments of debt
(833,334
)
 
(833,333
)
 
       Payment of contingent purchase price consideration
(8,180,000
)
 

 
Net cash provided by financing activities
36,095,572

 
55,908,685

 
Effect of exchange rate changes on cash
(12,155
)
 
13,105

 
Net increase in cash and cash equivalents
53,589,688

 
46,139,322

 
Cash and cash equivalents, beginning of period
25,714,519

 
27,351,969

 
Cash and cash equivalents, end of period
$
79,304,207

 
$
73,491,291

 
Supplemental cash flow information:
 
 
 
 
Cash paid for interest
$
201,731

 
$
193,893

 
Non-cash investing and financing activities:
 
 
 
 
Issuance of common stock, $0.01 par value, for payment of contingent purchase price consideration
$
216,567

 
$

 
Issuance of common stock, $0.01 par value, for acquisition of 4-Antibody AG

 
10,102,259

 
Contingent purchase price consideration issued in connection with the acquisition of 4-Antibody AG

 
9,721,000

 
See accompanying notes to unaudited condensed consolidated financial statements.

4

Table of Contents

AGENUS INC. AND SUBSIDIARIES
NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
March 31, 2015
Note A - Business, Liquidity and Basis of Presentation
Agenus Inc. (including its subsidiaries, also referred to as “Agenus,” the “Company,” “we,” “us,” and “our”) is an immunotherapy company discovering and developing innovative treatments for patients with cancer and other diseases in which modulation of immune function could provide therapeutic benefit. Our approaches are driven by three platform technologies:
our antibody platforms, including our proprietary Retrocyte Display™ and SECANT ® technologies (see Note M), and our antibody programs, including checkpoint modulators, or CPMs;
our heat shock protein (HSP)-based vaccines; and
our saponin-based vaccine adjuvants, principally our QS-21 Stimulon ® adjuvant, or QS-21 Stimulon.
We have a portfolio of programs in pre-clinical and clinical stages, including a series of CPMs in investigational new drug (IND)-enabling studies, our Prophage Series vaccine, a Phase 3 ready HSP-based autologous vaccine for glioblastoma multiforme, or GBM, a form of brain cancer, and a number of advanced QS-21 Stimulon-containing vaccine candidates in late stage development by our partner, GlaxoSmithKline (GSK).
For the treatment of cancer, our programs aim to stimulate the immune system to recognize and eradicate cancer cells and disable the mechanisms that cancer cells employ to evade detection and destruction by the immune system. Because of the breadth of our portfolio, we have the ability to combine our proprietary vaccines with a portfolio of checkpoint modulating antibodies against major checkpoint targets to explore and optimize cancer treatments. Our strategy is to develop these agents either alone or in combinations to yield best-in-class treatments. We assess the development, commercialization and/or partnering strategies with respect to each of our internal product candidates periodically based on several factors, including clinical trial results, competitive positioning and funding requirements and resources.
Agenus’ core technologies include Retrocyte Display, a powerful proprietary platform designed to effectively discover and optimize novel, fully human and humanized monoclonal antibodies against antigens of interest. Our Retrocyte Display technology is applied to the discovery and development of antibodies, including those targeting significant checkpoint targets. Agenus and its partners currently have pre-clinical programs targeting GITR, OX40, CTLA-4, LAG-3, TIM-3 and PD-1. In April 2015, we expanded our antibody discovery platform through the acquisition of key antibody assets from Celexion, LLC, see Note M. Among the acquired assets was the SECANT yeast display platform for the generation of novel monoclonal antibodies and efficient integration of drug targets such as CPMs.
In February 2015, we entered into a broad, global alliance with Incyte Corporation, or Incyte, to pursue the discovery and development of CPMs, initially targeting GITR, OX40, TIM-3 and LAG-3 in the fields of hematology and oncology. We also began collaborating with Merck Sharpe & Dohme in April 2014 to discover antibodies against two undisclosed CPM targets. We anticipate initiating clinical trials with the first of our CPM antibody candidates in 2016.
We have also been advancing a series of HSP-based vaccines to treat cancer and infectious disease. In July 2014, we reported positive results from a Phase 2 clinical trial with our Prophage Series vaccine, which showed that patients with newly-diagnosed GBM who were treated with a combination of our Prophage Series vaccine and standard of care showed substantial improvement both in progression-free survival and median overall survival, as compared to historical control data. We are currently exploring options to advance our Prophage Series vaccine into a Phase 3 clinical trial for newly diagnosed GBM, either alone or through a strategic relationship with a third party. We also reported positive results in June 2014 from a Phase 2 clinical trial with our HerpV vaccine candidate for genital herpes. While we do not expect to advance this into a Phase 3 clinical trial for genital herpes, these data demonstrated a HSP vaccine induced disease specific immune response against genital herpes, and we are currently in the process of evaluating the broader application of our HSP peptide-based vaccines beyond genital herpes.
The Company’s QS-21 Stimulon adjuvant is a key component in several of GSK’s pre-clinical and clinical stage vaccine programs, which target prophylactic or therapeutic impact in a variety of infectious diseases and cancer. In December 2014, GSK reported that its Phase 3 clinical trial with shingles vaccine HZ/su, using our QS-21 Stimulon adjuvant, met its primary endpoint, reducing the risk of shingles by 97.2% in adults aged 50 years and older compared to placebo. GSK also reported positive Phase 3 clinical trial results for its malaria vaccine using QS-21 Stimulon in October 2013. QS-21 Stimulon is also the subject of an out-license agreement with Janssen Sciences Ireland UC for use in a vaccine for Alzheimer’s disease.
Our business activities have included product research and development, intellectual property prosecution, manufacturing, regulatory and clinical affairs, corporate finance and development activities, and support of our collaborations. Our product candidates require clinical trials and approvals from regulatory agencies, as well as acceptance in the marketplace.

5


Part of our strategy is to develop and commercialize some of our product candidates by continuing our existing arrangements with academic and corporate collaborators and licensees and by entering into new collaborations.
We have incurred significant losses since our inception. As of March 31, 2015 we had an accumulated deficit of $710.0 million . We have financed our operations primarily through the sale of equity and debt securities. We believe that, based on our current plans and activities, our working capital resources at March 31, 2015 will be sufficient to satisfy our liquidity requirements through the first half of 2016.
We may attempt to raise additional funds by: (1) pursuing collaborative, out-licensing and/or partnering opportunities for our portfolio programs and product candidates with one or more third parties, (2) renegotiating third party agreements, (3) selling assets, (4) securing additional debt financing and/or (5) selling equity securities. Satisfying long-term liquidity needs may require the successful commercialization and/or substantial out-licensing or partnering arrangements for our antibody discovery platforms, CPM antibody programs, HSP-based vaccines, and vaccines containing QS-21 Stimulon under development by our licensees. Our long-term success will also be dependent on the successful identification, development and commercialization of potential other product candidates, each of which will require additional capital with no certainty of timing or probability of success. If we incur operating losses for longer than we expect and/or we are unable to raise additional capital, we may become insolvent and be unable to continue our operations.
Our research and development program costs include compensation and other direct costs plus an allocation of indirect costs, based on certain assumptions, and our review of the status of each program. Our product candidates are in various stages of research and development and significant additional expenditures will be required if we start new clinical trials, encounter delays in our programs, apply for regulatory approvals, continue development of our technologies, expand our operations, and/or bring our product candidates to market. The eventual total cost of each clinical trial is dependent on a number of factors such as trial design, length of the trial, number of clinical sites, number of patients, and trial sponsorship. The process of obtaining and maintaining regulatory approvals for new therapeutic products is lengthy, expensive, and uncertain. Because our CPM antibody programs are pre-clinical and the further development of our HSP-based vaccines is subject to evaluation and uncertainty, we are unable to reliably estimate the cost of completing our research and development programs or the timing for bringing such programs to various markets or substantial partnering or out-licensing arrangements. Therefore, we cannot predict if or when material cash inflows from operating activities are likely to commence. We will continue to adjust other spending as needed in order to preserve liquidity. Active programs involving QS-21 Stimulon depend on our collaborative partners or licensees successfully completing clinical trials, successfully manufacturing QS-21 Stimulon to meet demand, obtaining regulatory approvals and successfully commercializing product candidates containing QS-21 Stimulon.
The accompanying unaudited interim condensed consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) for interim financial information and with the instructions to Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by U.S. GAAP for complete annual consolidated financial statements. In the opinion of our management, the condensed consolidated financial statements include all normal and recurring adjustments considered necessary for a fair presentation of our financial position and operating results. All significant intercompany transactions and accounts have been eliminated in consolidation. Certain reclassifications have been made to previously reported amounts to conform to the current presentation. Operating results for the three months ended March 31, 2015 are not necessarily indicative of the results that may be expected for the year ending December 31, 2015 . For further information, refer to our consolidated financial statements and footnotes thereto included in our Annual Report on Form 10-K for the year ended December 31, 2014 filed with the Securities and Exchange Commission.
For our subsidiary 4-Antibody AG ("4-AB"), which operates in Switzerland and Germany, the local currency is the functional currency. Assets and liabilities of 4-AB are translated into U.S. dollars using rates in effect at the balance sheet date while revenues and expenses are translated into U.S. dollars using average exchange rates. The cumulative translation adjustment resulting from changes in exchange rates are included in the consolidated balance sheets as a component of accumulated other comprehensive loss in total stockholders’ equity.
The preparation of consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Management bases its estimates on historical experience and on various assumptions that are believed to be reasonable under the circumstances. Actual results could differ materially from those estimates.
Note B - Net Loss Per Share
Basic income and loss per common share is calculated by dividing the net loss attributable to common stockholders by the weighted average number of common shares outstanding (including common shares issuable under our Directors’ Deferred Compensation Plan, or DDCP). Diluted income per common share is calculated by dividing net income attributable to common

6


stockholders by the weighted average number of common shares outstanding (including common shares issuable under our DDCP) plus the dilutive effect of outstanding instruments such as warrants, stock options, nonvested shares, convertible preferred stock, and convertible notes. Because we reported a net loss attributable to common stockholders for all periods presented, diluted loss per common share is the same as basic loss per common share, as the effect of utilizing the fully diluted share count would have reduced the net loss per common share. Therefore, the following potentially dilutive securities have been excluded from the computation of diluted weighted average shares outstanding because they would be anti-dilutive:
 
March 31,
 
2015
 
2014
 
Warrants
4,351,450

 
2,951,450

 
Stock options
7,834,555

 
4,267,655

 
Nonvested shares
67,578

 
109,747

 
Convertible preferred stock
333,333

 
333,333

 
Convertible Notes

 
382,769

 

Note C - Debt

As of March 31, 2015, we have $14.4 million in principal of debt outstanding; $14.3 million of notes and $146,000 of debentures.

On February 20, 2015, we, certain existing investors and certain additional investors entered into an Amended and Restated Note Purchase Agreement, pursuant to which we (i) canceled our senior subordinated promissory notes issued in April 2013 (the "2013 Notes") in exchange for new senior subordinated promissory notes (the “2015 Subordinated Notes”) in the aggregate principal amount of $5.0 million , (ii) issued additional 2015 Subordinated Notes in the aggregate principal amount of $9.0 million and (iii) issued five year warrants to purchase 1,400,000 shares of our common stock at an exercise price of $5.10 per share.

The 2015 Subordinated Notes bear interest at a rate of 8% per annum, payable in cash on the first day of each month in arrears. Among other default and acceleration terms customary for indebtedness of this type, the 2015 Subordinated Notes include default provisions which allow for the noteholders to accelerate the principal payment of the 2015 Subordinated Notes in the event we become involved in certain bankruptcy proceedings, become insolvent, fail to make a payment of principal or (after a grace period) interest on the 2015 Subordinated Notes, default on other indebtedness with an aggregate principal balance of $13.5 million or more if such default has the effect of accelerating the maturity of such indebtedness, or become subject to a legal judgment or similar order for the payment of money in an amount greater than $13.5 million if such amount will not be covered by third-party insurance. The 2015 Subordinated Notes are not convertible into shares of our common stock and will mature on February 20, 2018, at which point we must repay the outstanding balance in cash. The Company may prepay the 2015 Subordinated Notes at any time, in part or in full, without premium or penalty.    

The exchange of the 2013 Notes for the 2015 Subordinated Notes was accounted for as a debt extinguishment under the guidance of Accounting Standards Codification 470-50 Debt: Modifications and Extinguishments. For the three months ended March 31, 2015 we recorded a loss on debt extinguishment of approximately $154,000 in non-operating (expense) income in our condensed consolidated statements of operations and comprehensive loss. The debt discount of approximately $3.0 million , which relates to the warrants issued in connection with the 2015 Subordinated Notes, is being amortized using the effective interest method over three years; the expected life of the 2015 Subordinated Notes.

In April 2015, we made our final payment of approximately $278,000 under our $5.0 million Loan and Security Agreement with Silicon Valley Bank ("SVB Loan") in accordance with the terms of the SVB Loan. We have no further outstanding indebtedness or obligations under the SVB Loan.

Note D - Collaborations

Incyte Corporation-
On January 9, 2015 and effective February 19, 2015 we entered into a global license, development and commercialization agreement (the “Collaboration Agreement”) with Incyte Corporation and a wholly-owned subsidiary thereof (collectively "Incyte"), pursuant to which the parties plan to develop and commercialize novel immuno-therapeutics using our proprietary antibody discovery platforms. The Collaboration Agreement is initially focused on four checkpoint modulator programs directed at GITR, OX40, LAG-3 and TIM-3. In addition to the four identified antibody programs, the parties have an

7


option to jointly nominate and pursue the development and commercialization of antibodies against additional targets during a five year discovery period which, upon mutual agreement of the parties for no additional consideration, can be extended for an additional three years.
On January 9, 2015 we also entered into a Stock Purchase Agreement with Incyte Corporation (the “Stock Purchase Agreement”) whereby, for an aggregate purchase price of $35.0 million , Incyte purchased approximately 7.76 million shares of our common stock, see Note K for more details.
Agreement Structure
Under the terms of the Collaboration Agreement, we received a non-creditable, nonrefundable upfront payment of $25.0 million . In addition, the parties will share all costs and profits for the GITR and OX40 antibody programs on a 50:50 basis (profit-share products), and we are eligible to receive up to $20 million in future contingent development milestones under these programs. Incyte is obligated to reimburse us for all development costs that we incur in connection with the LAG-3 and TIM-3 antibody programs (royalty-bearing products) and we are eligible to receive (i) up to $155 million in future contingent development, regulatory, and commercialization milestone payments and (ii) tiered royalties on global net sales at rates generally ranging from 6% to 12%. For each royalty-bearing product, we will also have the right to elect to co-fund 30% of development costs incurred following initiation of pivotal clinical trials in return for an increase in royalty rates. Additionally, we retain co-promotion participation rights in the United States on any profit-share product. Through the direction of a joint steering committee, the parties anticipate that, for each program, we will serve as the lead for pre-clinical development activities through IND filing, and Incyte will serve as the lead for clinical development activities. The parties expect to initiate the first clinical trials of antibodies arising from these programs in 2016. For each additional antibody arising from a program that the parties elect to bring into the collaboration, if any, we will have the option to designate it as a profit-share product or a royalty-bearing product.
The Collaboration Agreement will continue as long as (i) any product is being developed or commercialized or (ii) the discovery period remains in effect. After the first anniversary of the effective date of the Collaboration Agreement, Incyte may terminate the Collaboration Agreement or any individual program for convenience upon 12 months’ notice. The Collaboration Agreement may also be terminated by either party upon the occurrence of an uncured material breach of the other party or by us if Incyte challenges patent rights controlled by us. In addition, either party may terminate the Collaboration Agreement as to any program if the other party is acquired and the acquiring party controls a competing program.
Collaboration Revenue
Through the three months ended March 31, 2015 we have recognized revenue of approximately $3.6 million under the Collaboration Agreement, of which, $ 1.3 million is related to the amortization of the $25.0 million non-creditable, nonrefundable upfront payment. As of March 31, 2015 we have deferred revenue outstanding under the Collaboration Agreement of approximately $23.7 million .

Note E - Goodwill and Acquired Intangible Assets
The following table sets forth the changes in the carrying amount of goodwill for the three months ended March 31, 2015 (in thousands):    
Balance, December 31, 2014
 
$
17,869

  Foreign currency translation adjustment
 
400

Balance, March 31, 2015
 
$
18,269


Acquired intangible assets consisted of the following at March 31, 2015 (in thousands):
 
Amortization period (years)
 
Gross carrying amount
 
Accumulated amortization
 
Net carrying amount
Intellectual Property
15 years
 
$
4,461

 
$
(335
)
 
$
4,126

Trademarks
4.5 years
 
836

 
(209
)
 
627

Other
3 years
 
177

 
(66
)
 
111

In-process research and development
Indefinite
 
1,951

 

 
1,951

  Total
 
 
$
7,425

 
$
610

 
$
6,815


8


The weighted average amortization period of our finite-lived intangible assets is 13 years . Amortization expense related to acquired intangibles is estimated at $407,000 for the balance of 2015, $517,000 for each of the years ending 2016 and 2017, $412,000 for the year ending 2018, $297,000 for the year ending 2019, and $272,000 for each of the years 2020-2029.
The acquired in-process research and development ("IPR&D") asset relates to the six pre-clinical CPM antibody programs acquired with our acquisition of 4-AB in February 2014. IPR&D acquired in a business combination is capitalized at fair value until the underlying project is completed and is subject to impairment testing. Once the project is completed, the carrying value of IPR&D is amortized over the estimated useful life of the asset. Post-acquisition research and development expenses related to the acquired IPR&D are expensed as incurred.
Note F - Investments
Cash equivalents and short-term investments consisted of the following as of March 31, 2015 and December 31, 2014 (in thousands):
 
March 31, 2015
 
December 31, 2014
 
Cost
 
Estimated Fair Value
 
Cost
 
Estimated Fair Value
Institutional Money Market Funds
$
69,444

 
$
69,444

 
$
25,149

 
$
25,149

U.S. Treasury Bills

 

 
14,508

 
14,510

 
$
69,444

 
$
69,444

 
$
39,657

 
$
39,659

For the three months ended March 31, 2015 , we received proceeds of approximately $14.5 million from the sale of available-for-sale securities. No proceeds from the maturity of available-for-sale securities were received for the year ended December 31, 2014 . Gross realized gains and gross realized losses included in net loss as a result of the sale of available-for-sale securities were immaterial for the three months ended March 31, 2015 . As a result of the short-term nature of our investments, there were minimal unrealized holding gains or losses as March 31, 2015 and December 31, 2014 .
Of the investments listed above, $69.4 million and $25.1 million have been classified as cash equivalents on our condensed consolidated balance sheet as of March 31, 2015 and December 31, 2014 , respectively.
Note G - Share-based Compensation Plans
We primarily use the Black-Scholes option pricing model to value stock options granted to employees and non-employees, including stock options granted to members of our Board of Directors. All stock options have 10 -year terms and generally vest ratably over a 3 or 4 -year period. A non-cash charge to operations for the stock options granted to non-employees that have vesting or other performance criteria is affected each reporting period, until the non-employee options vest, by changes in the fair value of our common stock.
A summary of option activity for the three months ended March 31, 2015 is presented below:
 
 
Options
 
Weighted
Average
Exercise
Price
 
Weighted
Average
Remaining
Contractual
Term
(in years)
 
Aggregate
Intrinsic
Value
Outstanding at December 31, 2014
6,525,724

 
$
4.40

 
 
 
 
Granted
1,796,244

 
4.94

 
 
 
 
Exercised
(275,621
)
 
3.86

 
 
 
 
Forfeited
(179,743
)
 
3.18

 
 
 
 
Expired
(32,049
)
 
8.40

 
 
 
 
Outstanding at March 31, 2015
7,834,555

 
$
4.56

 
7.94
 
$
8,838,984

Vested or expected to vest at March 31, 2015
7,155,578

 
$
4.63

 
7.84
 
$
7,878,403

Exercisable at March 31, 2015
3,593,394

 
$
5.39

 
6.89
 
$
3,345,678

The weighted average grant-date fair values of stock options granted during the three months ended March 31, 2015 and 2014 , were $3.21 and $2.54 , respectively.

9


As of March 31, 2015 , $7.7 million of total unrecognized compensation cost, $297,000 of which pertains to a market condition award, related to stock options granted to employees and directors is expected to be recognized over a weighted average period of 2.4 years.
As of March 31, 2015 , unrecognized expense for options granted to outside advisors for which performance (vesting) has not yet been completed but the exercise price of the option is known is $839,000 . Such amount is subject to change each reporting period based upon changes in the fair value of our common stock, expected volatility, and the risk-free interest rate, until the outside advisor completes his or her performance under the option agreement.
Certain employees and consultants have been granted nonvested stock. The fair value of nonvested stock is calculated based on the closing sale price of our common stock on the date of issuance.

A summary of nonvested stock activity for the three months ended March 31, 2015 is presented below:  
 
Nonvested
Shares
 
Weighted
Average
Grant Date
Fair Value
Outstanding at December 31, 2014
78,828

 
$
3.93

Granted

 

Vested
(11,250
)
 
4.18

Forfeited

 

Outstanding at March 31, 2015
67,578

 


As of March 31, 2015 , there was $157,000  of unrecognized share-based compensation expense related to these nonvested shares awarded to employees expected to be recognized over a weighted average period of 1.6 years . As of March 31, 2015 , unrecognized expense for nonvested shares awarded to outside advisors is $49,000 . The total intrinsic value of shares vested during the three months ended March 31, 2015 , was $47,000 .
During the three months ended March 31, 2015 , 14,680 shares were issued under the 2009 Employee Stock Purchase Plan, 11,250 shares were issued as a result of the vesting of nonvested stock and 275,621 shares were issued as a result of stock option exercises.
The impact on our results of operations from share-based compensation for the three months ended March 31, 2015 , and 2014 , was as follows (in thousands):  
 
Three Months Ended March 31,
 
2015
 
2014
Research and development
$
570

 
254

General and administrative
923

 
700

Total share-based compensation expense
$
1,493

 
$
954

Note H - Accrued Liabilities
Accrued liabilities consisted of the following as of March 31, 2015 and December 31, 2014 (in thousands):  
 
March 31, 2015
 
December 31, 2014
Professional fees
$
1,685

 
$
1,438

Payroll
2,297

 
3,134

Other
2,272

 
930

 
$
6,254

 
$
5,502


Note I - Fair Value Measurements
We measure our short-term investments, contingent royalty obligation, and contingent purchase price consideration at fair value. Our short-term investments were comprised solely of U.S. Treasury securities that were valued using quoted market prices with no valuation adjustments applied. Accordingly, these securities are categorized as Level 1 assets.

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The fair values of our contingent royalty obligation and our contingent purchase price consideration, $14.8 million and $4.0 million , respectively, are based on significant inputs not observable in the market, which require them to be reported as Level 3 liabilities within the fair value hierarchy. The valuation of these liabilities uses assumptions we believe would be made by a market participant. In particular, the valuation analysis for the contingent royalty obligation used the Income Approach based on the sum of the economic income that an asset is anticipated to produce in the future. In this case that asset is the potential royalty income to be paid to us as a result of certain license agreements for QS-21 Stimulon. The fair value of the contingent royalty obligation is estimated by applying a risk adjusted discount rate ( 10.2% ) to the probability adjusted royalty revenue stream based on expected approval dates. These fair value estimates are most sensitive to changes in the probability of regulatory approvals. The Discounted Cash Flow method of the Income Approach was chosen as the method best suited to valuing the contingent royalty obligation.
The fair value of our contingent purchase price consideration is based on estimates from a Monte Carlo simulation of our market capitalization and other factors impacting the probability of triggering the milestone payments. Market capitalization was evolved using a geometric brownian motion, calculated daily for the life of the contingent purchase price consideration.
Assets and liabilities measured at fair value are summarized below (in thousands):
Description
 
March 31, 2015
 
Quoted Prices in Active
Markets for Identical Assets
(Level 1)
 
Significant Other Observable Inputs (Level 2)
 
Significant Unobservable
Inputs (Level 3)
Liabilities:
 
 
 
 
 
 
 
 
Contingent royalty obligation
 
$
14,800

 
$

 
$

 
$
14,800

Contingent purchase price consideration
 
3,958

 

 

 
3,958

 
 
$
18,758

 
$

 
$

 
$
18,758

 
 
 
 
 
 
 
 
 
Description
 
December 31, 2014
 
Quoted Prices in Active
Markets for Identical Assets
(Level 1)
 
Significant Other Observable Inputs (Level 2)
 
Significant Unobservable
Inputs (Level 3)
Assets:
 
 
 
 
 
 
 
 
Short-term investments
 
$
14,510

 
$
14,510

 
$

 
$

 
 
 
 
 
 
 
 
 
Liabilities:
 
 
 
 
 
 
 
 
Contingent royalty obligation
 
15,279

 

 

 
15,279

Contingent purchase price consideration
 
16,420

 

 

 
16,420

 
 
$
31,699

 
$

 
$

 
$
31,699

The following table presents our liabilities measured at fair value using significant unobservable inputs (Level 3), as of March 31, 2015 (amounts in thousands):
Balance, December 31, 2014
 
$
31,699

Change in fair value of contingent royalty obligation during the period
 
(479
)
Change in fair value of contingent purchase price consideration during the period
 
7,538

Achievement of contingent purchase price milestone
 
(20,000
)
Balance, March 31, 2015
 
$
18,758

The decrease in fair value of the contingent royalty obligation liability is included in non-operating (expense) income in our condensed consolidated statement of operations for the three months ended March 31, 2015 . There were no changes in the valuation techniques during the period and there were no transfers into or out of Levels 1 and 2.
On January 23, 2015, we achieved the first contingent milestone pursuant to the terms of our Share Exchange Agreement dated January 10, 2014, by and among us, 4-AB, the former shareholder of 4-AB and Vischer AG, as Representative (the "Share Exchange Agreement"), and accordingly we paid $20.0 million .

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The estimated fair values of all of our financial instruments, excluding our outstanding debt, approximate their carrying amounts in the condensed consolidated balance sheets. The fair value of our outstanding debt was derived by evaluating the nature and terms of each note and considering the prevailing economic and market conditions at the balance sheet date.
 The fair value of our outstanding debt balance at March 31, 2015 and December 31, 2014 was $15.2 million and $6.1 million respectively, based on the Level 2 valuation hierarchy of the fair value measurements standard using a present value methodology. The principal value of our outstanding debt balance at March 31, 2015 and December 31, 2014 was $14.4 million and $6.3 million , respectively.

Note J - Benefit Plans
We maintain a multiple employer benefit plan that covers all of our international employees. The annual measurement date for this plan is December 31. Benefits are based upon years of service and compensation.
For three months ended March 31, 2015 we contributed approximately $24,000 to our international multiple employer benefit plan and for the remainder of the year ending December 31, 2015 we expect to contribute approximately $80,000 to the plan. No contributions were made for the three months ended March 31, 2014 .
Note K - Equity
On January 9, 2015, in connection with the execution of the Collaboration Agreement, we also entered into the Stock Purchase Agreement with Incyte Corporation, pursuant to which Incyte Corporation purchased approximately 7.76 million shares of our common stock (the “Shares”) in February 2015 for an aggregate purchase price of $35.0 million , or approximately $ 4.51 per share. Under the Stock Purchase Agreement, Incyte has agreed not to dispose of any of the Shares for a period of 12 months and we have agreed to register the Shares for resale under the Securities Act of 1933, as amended (the "Securities Act").
In connection with the achievement of the first contingent milestone pursuant to the Share Exchange Agreement, we issued 50,596 shares of our common stock valued at approximately $217,000 as payment of a portion of our obligation.
Note L - Recent Accounting Pronouncements
In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers, ("ASU 2014-09"). ASU 2014-09 amends revenue recognition principles and provides a single set of criteria for revenue recognition among all industries. This new standard provides a five step framework whereby revenue is recognized when promised goods or services are transferred to a customer at an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The standard also requires enhanced disclosures pertaining to revenue recognition in both interim and annual periods. ASU 2014-09 is effective for interim and annual periods beginning after December 15, 2016. We are currently evaluating the potential impact that ASU 2014-09 may have on our financial position and results of operations.
In August 2014, the FASB issued ASU No. 2014-15, Disclosure of Uncertainties about an Entity's Ability to Continue as a Going Concern , ("ASU 2014-15"). ASU 2014-15 describes how an entity should assess its ability to meet obligations and sets rules for how this information should be disclosed in the financial statements. The standard provides accounting that will be used along with existing auditing standards. ASU 2014-15 applies to all entities and is effective for the annual period ending after December 15, 2016, and for annual and interim periods thereafter with early adoption permitted. We are currently evaluating the potential impact that ASU 2014-15 may have on our consolidated financial statements and related disclosures.

Note M - Subsequent Events
On April 7, 2015 (the “Closing Date”), we entered into an Asset Purchase Agreement (the “Purchase Agreement”) with Celexion, LLC (“Celexion”) and each of the members of Celexion, pursuant to which, we acquired Celexion’s SECANT yeast display antibody discovery platform, its full-length IgG antibody library, its technology for the discovery of molecules targeting cell membrane-associated antigens, and certain other related intellectual property assets (collectively, the “Purchased Assets”). As consideration for the Purchased Assets, on the Closing Date we paid Celexion $1.0 million in cash and issued Celexion 574,140 shares of our common stock valued at approximately $ 5.23 per share. As additional consideration for the Purchased Assets, we agreed under the Purchase Agreement to pay to Celexion (i) $1.0 million in cash payable on each of the 9-month and 18-month anniversaries of the Closing Date and (ii) $4.0 million on each of the 12-month and 24-month anniversaries of the Closing Date payable at our discretion in cash, shares of our common stock, or any combination thereof. If we elect to pay any of the additional consideration in shares of our common stock, such shares will be issued at a price per share equal to the simple average of the daily closing volume weighted average price over the 20 trading days preceding the date of issuance. We have agreed to file one or more registration statements under the Securities Act to cover the resale of all shares issued as

12


consideration under the Purchase Agreement. We are currently in the process of determining the impact the acquisition of the SECANT yeast display antibody discovery platform will have on our financial position and results of operations.
Item 2.
Management’s Discussion and Analysis of Financial Condition and Results of Operations
Forward Looking Statements
This Quarterly Report on Form 10-Q and other written and oral statements we make from time to time contain certain “forward-looking” statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934 (the “Exchange Act”). You can identify these forward-looking statements by the fact they use words such as “could,” “expect,” “anticipate,” “estimate,” “target,” “may,” “project,” “guidance,” “intend,” “plan,” “believe,” “will,” “potential,” “opportunity,” “future” and other words and terms of similar meaning and expression in connection with any discussion of future operating or financial performance. You can also identify forward-looking statements by the fact that they do not relate strictly to historical or current facts. Such forward-looking statements are based on current expectations and involve inherent risks and uncertainties, including factors that could delay, divert or change any of them, and could cause actual outcomes to differ materially from current expectations. These statements are likely to relate to, among other things, our business strategy, our research and development, our product development efforts, our ability to commercialize our product candidates, the activities of our licensees, our prospects for initiating partnerships or collaborations, the timing of the introduction of products, the effect of new accounting pronouncements, uncertainty regarding our future operating results and our profitability, anticipated sources of funds as well as our plans, objectives, expectations, and intentions.
We have included more detailed descriptions of these risks and uncertainties and other risks and uncertainties applicable to our business that we believe could cause actual results to differ materially from any forward-looking statements in Part II-Item 1A “Risk Factors” of this Quarterly Report on Form 10-Q. We encourage you to read those descriptions carefully. Although we believe we have been prudent in our plans and assumptions, no assurance can be given that any goal or plan set forth in forward-looking statements can be achieved. We caution investors not to place significant reliance on forward-looking statements contained in this document; such statements need to be evaluated in light of all the information contained in this document. Furthermore, the statements speak only as of the date of this document, and we undertake no obligation to update or revise these statements.
Oncophage ® , Stimulon ® , Retrocyte Display™ and SECANT ® are trademarks of Agenus Inc. and its subsidiaries. All rights reserved.
Overview
We are an immunotherapy company discovering and developing innovative treatments for patients with cancer and other diseases in which modulation of immune function could provide therapeutic benefit. Our approaches are driven by three platform technologies:
our antibody platform, including our proprietary Retrocyte Display and SECANT technologies, and our antibody programs, including checkpoint modulators, or CPMs;
our heat shock protein (HSP)-based vaccines; and
our saponin-based vaccine adjuvants, principally our QS-21 Stimulon adjuvant, or QS-21 Stimulon.
We have a portfolio of programs in pre-clinical and clinical stages, including a series of CPMs in investigational new drug (IND)-enabling studies, a Phase 3 ready HSP-based autologous vaccine for glioblastoma multiforme, or GBM, a form of brain cancer, and a number of advanced QS-21 Stimulon-containing vaccine candidates in late stage development by our partner, GlaxoSmithKline (GSK). We assess the development, commercialization and/or partnering strategies with respect to each of our internal product candidates periodically based on several factors, including clinical trial results, competitive positioning and funding requirements and resources.
For the treatment of cancer, our programs aim to stimulate the immune system to recognize and eradicate cancer cells and disable the mechanisms that cancer cells employ to evade detection and destruction by the immune system. Because of the breadth of our portfolio, we have the ability to combine our proprietary vaccines with a portfolio of checkpoint modulating antibodies against major checkpoint targets to explore and optimize cancer treatments. Our strategy is to develop these agents either alone or in combinations to yield best-in-class treatments. We assess the development, commercialization and/or partnering strategies with respect to each of our internal product candidates periodically based on several factors, including clinical trial results, competitive positioning and funding requirements and resources.
Our Retrocyte Display platform has been applied to the discovery and development of CPMs targeting significant checkpoint targets. Agenus and its partners have pre-clinical programs targeting GITR, OX40, CTLA-4, LAG-3, TIM-3 and PD-1. In April 2015, we expanded our antibody discovery platform through the acquisition of key antibody assets from

13


Celexion, LLC. Among the acquired assets was the SECANT yeast display platform for the generation of novel monoclonal antibodies and efficient integration of drug targets such as CPMs.
In January 2015, we announced a broad, global alliance with Incyte Corporation, or Incyte, to pursue the discovery and development of CPMs that initially target GITR, OX40, TIM-3 and LAG-3, and potentially other antibodies for the treatment of patients with cancer. We also began collaborating with Merck Sharpe & Dohme, or Merck, in April 2014 to discover antibodies against two undisclosed checkpoint targets. We plan to file two INDs in 2015 for CPM antibody candidates targeting GITR and CTLA-4, and we anticipate initiating clinical trials with the first of our CPM antibody candidates in 2016.
In addition to our internal development efforts, we continue to pursue collaborative, out-licensing and/or partnering opportunities for our portfolio programs and product candidates, as well as explore in-licensing, acquisitions and collaborative arrangements in areas of synergy with our existing programs. Our business activities have included product research and development, intellectual property prosecution, manufacturing, regulatory and clinical affairs, corporate finance and development activities, and support of our collaborations.
We have financed our operations primarily through the sale of equity and debt securities. We believe that, based on our current plans and activities, our working capital resources at March 31, 2015 will be sufficient to satisfy our liquidity requirements through the first half of 2016. We may attempt to raise additional funds by: (1) pursuing collaborative, out-licensing and/or partnering opportunities for our portfolio programs and product candidates with one or more third parties, (2) renegotiating third party agreements, (3) selling assets, (4) securing additional debt financing and/or (5) selling equity securities. Satisfying long-term liquidity needs may require the successful commercialization and/or substantial out-licensing or partnering arrangements for our antibody discovery platforms, CPM antibody programs, HSP-based vaccines, and vaccines containing QS-21 Stimulon under development by our licensees. Our long term success will also be dependent on the successful identification, development and commercialization of potential other product candidates, each of which will require additional capital with no certainty of timing or probability of success. If we incur operating losses for longer than we expect and/or we are unable to raise additional capital, we may become insolvent and be unable to continue our operations.
Historical Results of Operations
Three months ended March 31, 2015 Compared to the three months ended March 31, 2014
Revenue: We recognized revenue of approximately $4.0 million and $721,000 during the three months ended March 31, 2015 and 2014 , respectively. Revenues primarily include fees earned under our license agreements. During the three months ended March 31, 2015 and 2014, we recorded approximately $1.3 million and $689,000 , respectively, from the amortization of deferred revenue.
Research and Development: Research and development expenses include the costs associated with our internal research and development activities, including compensation and benefits, occupancy costs, clinical manufacturing costs, costs of consultants, and administrative costs. Research and development expense increased 106% to $9.2 million for the three months ended March 31, 2015 from $4.5 million for the three months ended March 31, 2014 . Increased expenses in 2015 primarily relate to the increased research and development costs of the CPM antibody programs and compensation expense related to increased headcount.
General and Administrative: General and administrative expenses consist primarily of personnel costs, facility expenses, and professional fees. General and administrative expenses increased 6% to $5.5 million for the three months ended March 31, 2015 from $5.2 million for the three months ended March 31, 2014 .
Contingent purchase price consideration fair value adjustment: Contingent purchase price consideration fair value adjustment represents the increase in the fair value of our contingent purchase price consideration during the three months ended March 31, 2015 related to the achievement of a milestone during the quarter.
Non-operating (expense) income: Non-operating expense for the three months ended March 31, 2015 represents a foreign currency exchange loss as well as the loss on extinguishment of our 2013 Notes partially offset by the change in the fair value of our contingent royalty obligation. Non-operating income for the three months ended March 31, 2014 represents the change in the fair value of our contingent royalty obligation. The fair value of this contingent royalty obligation changed primarily due to changes in the estimated revenue stream underlying the obligation.
Interest Expense, net: Interest expense, net increased to approximately $397,000 for the three months ended March 31, 2015 from $356,000 for the three months ended March 31, 2014 due to the issuance of our 2015 Subordinated Notes in February 2015.
Research and Development Programs

14


During the three months ended March 31, 2015 , these research and development programs consisted largely of our HSP-based vaccines for cancer and infectious diseases and CPM antibody programs as indicated in the following table (in thousands).
Research and
Development Program
 
Product
 
Three Months Ended March 31,
 
Year Ended December 31,
 
Prior to
2012
 
Total
 
2015
 
2014
 
2013
 
2012
 
Heat shock proteins for cancer
 
Prophage
Series
Vaccines
 
$
1,178

 
$
6,153

 
$
5,882

 
$
5,613

 
$
292,033

 
$
310,859

Heat shock proteins for infectious diseases
 
HerpV
 
227

 
2,443

 
6,358

 
4,862

 
19,088

 
32,978

Vaccine adjuvant
 
QS-21 Stimulon
 
72

 
321

 
753

 
85

 
12,498

 
13,729

Checkpoint modulator programs*
 
 
 
7,608

 
13,422

 

 

 

 
21,030

Other research and development programs
 
 
 
135

 
10

 
12

 
4

 
33,540

 
33,701

Total research and development expenses
 
 
 
$
9,220

 
$
22,349

 
$
13,005

 
$
10,564

 
$
357,159

 
$
412,297

___________________________ 
*    Prior to 2014, costs were incurred by 4-Antibody (4-AB), a company we acquired in February 2014.
Research and development program costs include compensation and other direct costs plus an allocation of indirect costs, based on certain assumptions and our review of the status of each program. Our product candidates are in various stages of development and significant additional expenditures will be required if we start new clinical trials, encounter delays in our programs, apply for regulatory approvals, continue development of our technologies, expand our operations, and/or bring our product candidates to market. The total cost of any particular clinical trial is dependent on a number of factors such as trial design, length of the trial, number of clinical sites, number of patients, and trial sponsorship. The process of obtaining and maintaining regulatory approvals for new therapeutic products is lengthy, expensive, and uncertain. Because our CPM antibody programs are pre-clinical, and because further development of HSP-based vaccines is dependent on successful partnering or funding efforts, among other factors, we are unable to reliably estimate the cost of completing our research and development programs or the timing for bringing such programs to various markets or substantial partnering or out-licensing arrangements, and, therefore, when, if ever, material cash inflows are likely to commence. Active programs involving QS-21 Stimulon depend on our collaborative partners or licensees successfully completing clinical trials, successfully manufacturing QS-21 Stimulon to meet demand, obtaining regulatory approvals and successfully commercializing product candidates containing QS-21 Stimulon.
Liquidity and Capital Resources

We have incurred annual operating losses since inception, and we had an accumulated deficit of $ 710.0 million as of March 31, 2015 . We expect to incur significant losses over the next several years as we continue development of our technologies and product candidates, manage our regulatory processes, initiate and continue clinical trials, and prepare for potential commercialization of products. We have financed our operations primarily through the sale of equity and debt securities, and interest income earned on cash, cash equivalents, and short-term investment balances. From our inception through March 31, 2015 , we have raised aggregate net proceeds of approximately $ 663.7 million through the sale of common and preferred stock, the exercise of stock options and warrants, proceeds from our employee stock purchase plan, and the issuance of convertible notes and other notes. In February 2015, we received aggregate proceeds of $ 60.0 million through our collaboration and stock purchase agreements with Incyte Corporation and issued $ 9.0 million in new 2015 Subordinated Notes.
We also maintain an effective registration statement (the "Shelf Registration Statement"), covering the offering of up to $150.0 million of common stock, preferred stock, warrants, debt securities and units. The Shelf Registration Statement includes a prospectus covering the offering, issuance and sale of up to ten million shares of our common stock from time to time in “at the market offerings” pursuant to an At Market Sales Issuance Agreement (the “Sales Agreement”) entered into with MLV & Co. LLC (the “Sales Agent”). Pursuant to the Sales Agreement, sales will be made only upon instructions by us to the Sales Agent, and we cannot provide any assurances that we will issue any shares pursuant to the Sales Agreement. As of March 31, 2015 , we have 10.0 million shares available for sale under the Sales Agreement.

15


As of March 31, 2015 , we had $14.4 million of debt outstanding, $278,000 of which was paid and settled in April 2015. In April 2013, we entered into a Note Purchase Agreement with various investors for senior subordinated notes (the “2013 Notes”) in the aggregate principal amount of $ 5.0 million due in April 2015. In February 2015, we exchanged the 2013 Notes for new senior subordinated notes (the "2015 Subordinated Notes") in the aggregate principal amount of $ 5.0 million with annual interest at 8% and also issued additional 2015 Subordinated Notes in the aggregate principal amount of $ 9.0 million , such notes due February 2018. In addition, we also issued to the holders of the 2015 Subordinated Notes five year warrants to purchase 1.4 million unregistered shares of our common stock at an exercise price of $5.10 per share.
Our cash, cash equivalents, and short-term investments at March 31, 2015 were $79.3 million , an increase of $39.1 million from December 31, 2014 , principally as a result of (i) our collaboration and stock purchase agreements with Incyte which generated aggregate proceeds of $ 60.0 million and (ii) our 2015 Subordinated Notes which generated an aggregate of $9.0 million of new proceeds. We believe that, based on our current plans and activities, our cash and cash equivalents of $79.3 million as of March 31, 2015 will be sufficient to satisfy our liquidity requirements through the first half of 2016. We continue to monitor the likelihood of success of our key initiatives and are prepared to discontinue funding of such activities if they do not prove to be feasible, restrict capital expenditures and/or reduce the scale of our operations.

We expect to attempt to raise additional funds in advance of depleting our current funds. We may attempt to raise funds by: (1) pursuing collaborative, out-licensing and/or partnering opportunities for our portfolio programs and product candidates with one or more third parties, (2) renegotiating third party agreements, (3) selling assets, (4) securing additional debt financing and/or (5) selling equity securities. Satisfying long-term liquidity needs may require the successful commercialization and/or substantial out-licensing or partnering arrangements for our antibody discovery platforms, CPM antibody programs, HSP-based vaccines, and vaccines containing QS-21 Stimulon under development by our licensees. Our long-term success will also be dependent on the successful identification, development and commercialization of potential other product candidates, each of which will require additional capital with no certainty of timing or probability of success. If we incur operating losses for longer than we expect and/or we are unable to raise additional capital, we may become insolvent and be unable to continue our operations.
Our future cash requirements include, but are not limited to, supporting clinical trial and regulatory efforts and continuing our other research and development programs. Since inception, we have entered into various agreements with contract manufacturers, institutions and clinical research organizations (collectively "third party providers") to perform pre-clinical activities and to conduct and monitor our clinical studies. Under these agreements, subject to the enrollment of patients and performance by the applicable third party provider, we have estimated our total payments to be $71.1 million over the term of the related activities. Through March 31, 2015 , we have expensed $53.9 million as research and development expenses and $52.6 million has been paid under these agreements. The timing of expense recognition and future payments related to these agreements is subject to the enrollment of patients and performance by the applicable third party provider. We have also entered into sponsored research agreements related to our product candidates that required payments of $6.7 million , $6.6 million of which have been paid as of March 31, 2015 . We plan to enter into additional agreements with third party providers as well as sponsored research agreements, and we anticipate significant additional expenditures will be required to initiate and advance our various programs.
Part of our strategy is to develop and commercialize some of our product candidates by continuing our existing collaborative arrangements with academic and collaborative partners and licensees and by entering into new collaborations. As a result of our collaborative agreements, we will not completely control the efforts to attempt to bring those product candidates to market. For example, our collaboration with Incyte for the development, manufacture and commercialization of CPM antibodies against certain targets is managed by a joint steering committee with equal representation from Agenus and Incyte. We also have agreements with licensees that allow the use of our QS-21 Stimulon adjuvant in numerous vaccines, which grant exclusive worldwide rights in some fields of use and co-exclusive or non-exclusive rights in others. These agreements generally call for royalties to be paid to us on future sales of licensed products that result from these agreements, which may or may not be achieved.

Net cash provided by operating activities for the three months ended March 31, 2015 was $3.3 million while net cash used in operating activities for the three months ended March 31, 2014 , was $10.1 million . This increase primarily resulted from the receipt of the up-front fees under our Collaboration Agreement with Incyte partially offset by the payment related to our contingent purchase price consideration during 2015. We continue to support and develop our QS-21 Stimulon partnering collaborations. If applications for marketing approval of vaccines that are submitted by our licensees are approved, the first products containing QS-21 Stimulon are anticipated to be launched in the 2016-2017 time-frame. We are generally entitled to royalties on sales by our licensees of vaccines using QS-21 Stimulon for at least 10 years after commercial launch, with some exceptions. Our future ability to generate cash from operations will depend on achieving regulatory approval and market acceptance of our product candidates, achieving benchmarks as defined in existing collaborative agreements, and our ability to enter into new collaborations. Under our Collaboration Agreement with Incyte, we are required to share costs with Incyte on a

16


50:50 basis under the GITR and OX40 programs; there is a potential for these costs to be high and the development program budgets for these antibodies to not be in our complete control.
Recent Accounting Pronouncements
In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers, ("ASU 2014-09"). ASU 2014-09 amends revenue recognition principles and provides a single set of criteria for revenue recognition among all industries. This new standard provides a five step framework whereby revenue is recognized when promised goods or services are transferred to a customer at an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The standard also requires enhanced disclosures pertaining to revenue recognition in both interim and annual periods. ASU 2014-09 is effective for interim and annual periods beginning after December 15, 2016. We are currently evaluating the potential impact that ASU 2014-09 may have on our financial position and results of operations.
In August 2014, the FASB issued ASU No. 2014-15, Disclosure of Uncertainties about an Entity's Ability to Continue as a Going Concern , ("ASU 2014-15"). ASU 2014-15 describes how an entity should assess its ability to meet obligations and sets rules for how this information should be disclosed in the financial statements. The standard provides accounting guidance that will be used along with existing auditing standards. ASU 2014-15 applies to all entities and is effective for the annual period ending after December 15, 2016, and for annual and interim periods thereafter with early adoption permitted. We are currently evaluating the potential impact that ASU 2014-15 may have on our consolidated financial statements and related disclosures.

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Item 3.
Quantitative and Qualitative Disclosures About Market Risk

Our primary market risk exposure is foreign currency exchange rate risk. International revenues and expenses are generally transacted by our foreign subsidiaries and are denominated in local currency. Approximately 28% and 22% of our operating expenses for the three months ended March 31, 2015 and the year ended December 31, 2014 , respectively, were from a foreign subsidiary. Additionally, in the normal course of business, we are exposed to fluctuations in interest rates as we seek debt financing and invest excess cash. We are also exposed to foreign currency exchange rate fluctuation risk related to our transactions denominated in foreign currencies. We do not currently employ specific strategies, such as the use of derivative instruments or hedging, to manage these exposures. Our currency exposures vary, but are primarily concentrated in the Euro and Swiss Franc, in large part due to our wholly-owned subsidiary, 4-Antibody, a company with operations in Switzerland and Germany. There has been no material change to our interest rate exposure and our approach toward interest rate and foreign currency exchange rate exposures, as described in our Annual Report on Form 10-K for the year ended December 31, 2014 .
We had cash and cash equivalents at March 31, 2015 of $79.3 million , which are exposed to the impact of interest rate changes, and our interest income fluctuates as interest rates change. Due to the short-term nature of our investments in money market funds, our carrying value approximates the fair value of these investments at March 31, 2015 .
We invest our cash and cash equivalents in accordance with our investment policy. The primary objectives of our investment policy are to preserve principal, maintain proper liquidity to meet operating needs, and maximize yields. We review our investment policy annually and amend it as deemed necessary. Currently, the investment policy prohibits investing in any structured investment vehicles and asset-backed commercial paper. Although our investments are subject to credit risk, our investment policy specifies credit quality standards for our investments and limits the amount of credit exposure from any single issue, issuer, or type of investment. We do not invest in derivative financial instruments. Accordingly, we do not believe that there is currently any material market risk exposure with respect to derivatives or other financial instruments that would require disclosure under this item.

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Item 4.
Controls and Procedures
Evaluation of Disclosure Controls and Procedures
Under the supervision and with the participation of our management, including our Principal Executive Officer and Principal Financial Officer, we conducted an evaluation of the effectiveness of our disclosure controls and procedures, as such term is defined under Rule 13a-15(e) and Rule 15d-15(e) promulgated under the Exchange Act. Based on this evaluation, our Principal Executive Officer and our Principal Financial Officer concluded that, as of the end of the period covered by this Quarterly Report on Form 10-Q, our disclosure controls and procedures were effective and were designed to ensure that information we are required to disclose in the reports that we file or submit under the Exchange Act is accumulated and communicated to management, including our Principal Executive Officer and Principal Financial Officer, as appropriate, to allow timely decisions regarding required disclosure, and is recorded, processed, summarized and reported within the time periods specified in the Securities and Exchange Commission's rules and forms. It should be noted that any system of controls is designed to provide reasonable, but not absolute, assurances that the system will achieve its stated goals under all reasonably foreseeable circumstances. Our Principal Executive Officer and Principal Financial Officer have each concluded that our disclosure controls and procedures as of the end of the period covered by this report are effective at a level that provides such reasonable assurances.
Changes in Internal Control Over Financial Reporting
There was no change in our internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act) that occurred during the first quarter ended March 31, 2015 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.
 

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PART II - OTHER INFORMATION
Item 1A.
Risk Factors
Our future operating results could differ materially from the results described in this Quarterly Report on Form 10-Q due to the risks and uncertainties described below. You should consider carefully the following information about risks below in evaluating our business. If any of the following risks actually occur, our business, financial conditions, results of operations and future growth prospects would likely be materially and adversely affected. In these circumstances, the market price of our common stock would likely decline. These risk factors restate and supersede the risk factors set forth under the heading "Risk Factors" in our Annual Report on Form 10-K for the year ended December 31, 2014 .
We cannot assure investors that our assumptions and expectations will prove to be correct. Important factors could cause our actual results to differ materially from those indicated or implied by forward-looking statements. See “Management's Discussion and Analysis of Financial Condition and Results of Operations-Forward Looking Statements” in Part I, Item 2 of this Quarterly Report on Form 10-Q. Factors that could cause or contribute to such differences include those factors discussed below.
Risks Related to our Business
If we incur operating losses for longer than we expect, or we are not able to raise additional capital, we may be unable to continue our operations, or we may become insolvent.
Our net losses for the years ended December 31, 2014 , 2013 , and 2012 , were $ 42.5 million , $ 30.1 million , and $ 11.3 million , respectively. During three months ended March 31, 2015 , we generated a net loss of $18.7 million .
We expect to incur additional losses over the next several years as we continue research and clinical development of our technologies and pursue partnering opportunities, regulatory strategies, commercialization, and related activities. Furthermore, our ability to generate cash from operations is dependent on the success of our licensees and collaborative partners, as well as the likelihood and timing of new strategic licensing and partnering relationships and/or successful development and commercialization of CPM product candidates, including through our collaboration with Incyte, our HSP-based vaccines, and vaccines containing QS-21 Stimulon. From our inception through March 31, 2015 , we have incurred net losses totaling $710.0 million .
On March 31, 2015 , we had $79.3 million in cash and cash equivalents. We believe that, based on our current plans and activities, our working capital resources at March 31, 2015 will be sufficient to satisfy our liquidity requirements through the first half of 2016. We expect to attempt to raise additional funds in advance of depleting our current funds although additional funding may not be available on favorable terms, or at all. For the three months ended March 31, 2015 , our average monthly cash provided by operating activities was approximately $1.1 million . This average monthly cash provided by operating activities primarily resulted from one-time payments received under the collaboration agreement and therefore our net cash provided by operations for the quarter ended March 31, 2015 is not indicative of future results.
To date, we have financed our operations primarily through the sale of equity and debt securities. In order to finance future operations, we will be required to raise additional funds in the capital markets, through arrangements with collaborative partners, such as our global alliance with Incyte, or from other sources. Additional financing may not be available on favorable terms, or at all. If we are unable to raise additional funds when we need them or if we incur operating losses for longer than we expect, we may not be able to continue some or all of our operations, or we may become insolvent. We also may be forced to license or sell technologies to others under agreements that are on unfavorable terms or allocate to third parties substantial portions of the potential value of these technologies.
There are a number of factors that will influence our future capital requirements, including, without limitation, the following:

the number and characteristics of the product candidates we pursue;

our ability to successfully develop, manufacture and commercialize CPM product candidates, including pursuant to our collaboration agreement with Incyte;

the scope, progress, results and costs of researching and developing our future product candidates, and conducting pre-clinical and clinical trials, including with respect to our GITR and OX40 antibody programs, for which we have agreed to share all costs and profits with Incyte on a 50:50 basis;


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the timing of, and the costs involved in, obtaining regulatory approvals for our and our licensees' product candidates;

the cost of manufacturing;

our ability to establish and maintain strategic partnerships, licensing or other arrangements and the financial terms of such arrangements;

the costs involved in preparing, filing, prosecuting, maintaining, defending and enforcing our intellectual property rights;

the costs associated with any successful commercial operations; and

the timing, receipt and amount of sales of, or royalties on, our future products and those of our partners, if any.
General economic conditions in the United States economy and abroad may have a material adverse effect on our liquidity and financial condition, particularly if our ability to raise additional funds is impaired. The ability of potential patients and/or health care payers to pay for our products could also be adversely impacted, thereby limiting our potential revenue. In addition, any negative impacts from any deterioration in the credit markets on our collaborative partners could limit potential revenue from our product candidates.
If we default on certain of our outstanding debt instruments and the repayment of such indebtedness is accelerated, our liquidity could be materially and adversely affected.
In February 2015, we exchanged the senior subordinated promissory notes that we issued in 2013 for new senior subordinated promissory notes in the aggregate principal amount of $5.0 million with annual interest at 8%, and we issued an additional $9.0 million principal amount of such notes (the "2015 Subordinated Notes"). The 2015 Subordinated Notes are due February 2018 and include default provisions which allow for the acceleration of the principal payment of the 2015 Subordinated Notes in the event we become involved in certain bankruptcy proceedings, become insolvent, fail to make a payment of principal or (after a grace period) interest on the 2015 Subordinated Notes, default on other indebtedness with an aggregate principal balance of $13.5 million or more if such default has the effect of accelerating the maturity of such indebtedness, or become subject to a legal judgment or similar order for the payment of money in an amount greater than $13.5 million if such amount will not be covered by third-party insurance.
If we default on the 2015 Subordinated Notes and the repayment of such indebtedness is accelerated, our liquidity could be materially and adversely affected.
Our ability to satisfy our obligations under this indebtedness will depend upon our future performance, which is subject to many factors, including the factors identified in this “Risk Factors” section and other factors beyond our control. If we do not have sufficient cash on hand to service our indebtedness, we may be required, among other things, to:
seek additional financing in the debt or equity markets;
refinance or restructure all or a portion of our indebtedness;
sell, out-license, or otherwise dispose of assets; and/or
reduce or delay planned expenditures on research and development and/or commercialization activities.
Such measures might not be sufficient to enable us to make principal and interest payments. In addition, any such financing, refinancing, or sale of assets might not be available on favorable terms, if at all.
We are dependent upon our collaboration with Incyte to further develop, manufacture and commercialize CPM antibodies against certain targets using our proprietary antibody discovery platforms. If we or Incyte fail to perform as expected, the potential for us to generate future revenues under the collaboration would be significantly reduced, the development and/or commercialization of these CPM antibodies may be terminated or substantially delayed, and our business would be severely harmed.
Under the terms of our collaboration agreement with Incyte, we and Incyte have created a joint steering committee that oversees and manages worldwide regulatory, development, manufacturing and commercialization activities for our CPM antibody product candidates with equal representation from both parties. We anticipate that, for each program, Agenus will serve as the lead for pre-clinical development activities through the filing of an investigational new drug application, or IND, and Incyte will serve as the lead for clinical development activities. Accordingly, the timely and successful completion by Incyte of clinical development activities will significantly affect the timing and amount of any revenues we may receive under the collaboration agreement. Incyte’s activities will be influenced by, among other things, the efforts and allocation of resources

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by Incyte, which we cannot control. If Incyte does not perform in the manner we expect or fulfill its responsibilities in a timely manner, or at all, the clinical development, manufacturing, regulatory approval and commercialization efforts related to CPM antibodies under the collaboration could be delayed or terminated, and it could become necessary for us to assume the responsibilities for the clinical development, manufacturing, regulatory approval or commercialization of the CPM antibodies at our own expense. Accordingly, there can be no assurance that any of the development, regulatory or sales milestones will be achieved, that we will receive any future milestone or royalty payments under the collaboration agreement, or that we will share in any revenues under the collaboration agreement.
In addition, our collaboration with Incyte may be unsuccessful due to other factors, including the following:
After the first anniversary of the effective date of the collaboration agreement, Incyte may terminate the agreement or any individual program for convenience upon 12 months’ notice;
We may have disagreements with Incyte that are not settled amicably or in our favor, particularly on the joint steering committee where Incyte will under most circumstances have the deciding vote in the event of a disagreement;
Incyte may change the focus of its development and commercialization efforts or prioritize other programs more highly and, accordingly, reduce the efforts and resources allocated to our collaboration;
Incyte may choose not to develop and commercialize CPM products, if any, in all relevant markets or for one or more indications, if at all; and
If Incyte is acquired during the term of our collaboration, the acquirer may have competing programs or different strategic priorities that could cause it to reduce its commitment to our collaboration.
If Incyte terminates our collaboration agreement, we would need to raise additional capital and may need to identify and come to agreement with another collaboration partner to advance our CPM programs. Even if we are able to find another partner, this effort could cause delays in our timelines and/or additional expenses, which could adversely affect our business prospects and the future of our CPM antibody product candidates.
Our CPM programs are still in pre-clinical development, and there is no guarantee that they will be successful or produce any revenues from CPM antibody product candidates, if any.
Our CPM programs are currently in pre-clinical development. Even if our pre-clinical studies produce positive results, they may not necessarily be predictive of the results of future clinical trials in humans. Many companies in the pharmaceutical and biotechnology industries have suffered significant setbacks in clinical trials after achieving positive results in pre-clinical development, and we cannot be certain that we will not face similar setbacks. These setbacks have been caused by, among other things, pre-clinical findings made while clinical trials were underway or safety or efficacy observations made in clinical trials, including adverse events. Moreover, pre-clinical and clinical data are often susceptible to varying interpretations and analyses, and many companies that believed their product candidates performed satisfactorily in pre-clinical studies and clinical trials nonetheless failed to obtain regulatory approval. If we fail to produce positive results in future clinical trials of CPM antibodies, our business and financial prospects would be materially adversely affected.
We are undergoing significant growth, and we may encounter difficulties in managing this growth, which could disrupt our operations.
From January 1, 2014 to March 31, 2015 we increased our employee headcount from 68 to 140, 38 of whom joined us in connection with the acquisition of 4-AB in February 2014. In addition, through 4-AB, we also expanded our research and development activities internationally to Switzerland and Germany. In April 2015, we further expanded our antibody discovery platform through the acquisition of antibody platform assets from Celexion, LLC. We expect to continue increasing our headcount as we continue to build our research and development capabilities and integrate our acquired technology platforms. To manage this anticipated growth and expansion, we must continue to implement and improve our managerial, operational and financial systems and continue to recruit, train and retain qualified personnel. If our management is unable to effectively manage our growth, our expenses may increase more than expected, our ability to generate revenue could be reduced, and we may not be able to implement our business strategy.
We may fail to realize the benefits we expect to realize as a result of the acquisition of certain assets from Celexion, LLC and/or we may suffer a loss in productivity as a result of the integration of those assets into our business.
The long-term success of the acquisition of certain assets, including the SECANT yeast display platform for the generation of novel monoclonal antibodies and efficient integration of drug targets such as CPMs, from Celexion, LLC will depend, in part, on our ability to realize the anticipated business opportunities and growth prospects from combining our proprietary Retrocyte Display platform with the SECANT platform. We may never realize these anticipated business opportunities and growth prospects. We might experience increased competition that limits our ability to expand our business, and we might not be able to capitalize on expected business opportunities, including advancing the development of CPMs. If any of these factors limit our ability to integrate the SECANT technology platform with our existing technologies successfully

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or on a timely basis, or to develop the business opportunities that we expect to realize from the acquisition of the SECANT technology platform, the expectations of future results of operations might not be met.
We may not receive anticipated QS-21 Stimulon revenues from our licensees.
We currently rely upon and expect to continue to rely upon third party licensees, particularly GlaxoSmithKline, or GSK, to develop, test, market and manufacture vaccines that utilize our QS-21 Stimulon adjuvant.
As each licensee controls its own product development process, we cannot predict our licensees' requirements for QS-21 Stimulon in the future or to what extent, if any, they will develop vaccines that use QS-21 Stimulon as an adjuvant. Our licensees may initiate or terminate programs containing QS-21 Stimulon at any time. In addition, clinical trials being conducted by our licensees may not be successful. For example, in April 2014, GSK announced the termination of a Phase 3 trial of its MAGE-A3 cancer immunotherapeutic (a vaccine containing QS-21 Stimulon) in non-small cell lung cancer, and in 2013, GSK announced the Phase 3 trial of their MAGE-A3 cancer immunotherapeutic in melanoma missed its first co-primary endpoint and that the study would continue until completion of its second co-primary endpoint, which is expected to occur in 2015. The results of these trials and other trials conducted by our licensees, as well as other factors, may cause our licensees to terminate additional programs containing QS-21 Stimulon, which could materially diminish future potential revenue from QS-21 Stimulon. In addition, even if our licensees successfully complete clinical trials with vaccine candidates using QS-21 Stimulon there is no guarantee that these products will obtain regulatory approval or, if so approved, will generate any future milestones or royalty payments.
Any inability to receive anticipated revenues, or a reduction in revenues, generated from QS-21 Stimulon could have a material adverse effect on our business, financial condition and results of operations.
Our HSP peptide-based platform for infectious diseases is in early stage development, and there is no guarantee that a product candidate will progress from this platform.
In June 2014, we reported positive results from a Phase 2 trial with our HerpV vaccine candidate for genital herpes, which includes QS-21 Stimulon. While the HerpV Phase 2 met its formal endpoints, it is unclear that the magnitude of the effect on viral load would be sufficient to significantly reduce the incidence, severity, or duration of herpetic lesions or reduce the risk of viral transmission. Although we would consider potential partnering relationships for the further development of our HerpV program, we are not currently engaged in any discussions with any such potential partners, and we do not currently expect to advance this program into a Phase 3 trial. We are currently in the process of evaluating the broader application of our HSP peptide-based vaccines beyond genital herpes, but there is no guarantee that a product candidate will progress from this platform. Furthermore, it is possible that research and discoveries by others will render any product candidate obsolete or noncompetitive.
We may not be able to advance clinical development or commercialize Prophage Series vaccines or realize any benefits from this program without a partner or an alternative means of financing.
The probability of future clinical development efforts leading to marketing approval and commercialization of Prophage Series vaccines is highly uncertain. Prophage Series vaccines have been in clinical development for over 15 years, including multiple Phase 1 and 2 trials in eight different tumor types as well as randomized Phase 3 trials in metastatic melanoma and adjuvant renal cell carcinoma. To date, none of our clinical trials with Prophage Series vaccines has resulted in a marketing approval, except in Russia where commercialization of the approved product was unsuccessful. Due to our limited resources and our corporate priorities, we do not expect to support on-going clinical studies with Prophage Series vaccines or perform additional studies without the help of a partner or alternative means of financing.
We do not currently sponsor any on-going clinical trials with Prophage Series vaccines and therefore we lack the ability to control trial design, timelines and data availability. Current and future studies may eventually be terminated due to, among other things, slow enrollment, lack of probability that they will yield useful translational and/or efficacy data, lengthy timelines, or the unlikelihood that results will support timely or successful regulatory filings. Currently, the only actively enrolling Prophage Series vaccine clinical study is a Phase 2 trial of Prophage Series vaccine in combination with bevacizumab in patients with surgically resectable recurrent glioma. This trial is being conducted under the sponsorship of the Alliance for Clinical Trials in Oncology, a cooperative group of the National Cancer Institute. To date, clinical site activation and patient enrollment have not met expectations, which could curtail the viability of sustaining the trial. Furthermore, potential changes in clinical practices trending away from the administration of bevacizumab for the treatment of recurrent glioma could exacerbate enrollment issues and/or render the trial design impractical. In January 2014, we initiated a randomized Phase 2 trial with Prophage Series vaccine and Bristol-Myers Squibb's ipilimumab, for the treatment of Stage III and IV metastatic melanoma. This study is being sponsored by an investigator at the University of Texas and, although the investigator-held IND was activated to allow initiation of the trial, patient enrollment has not yet begun. The design of this study protocol was recently modified to incorporate a non-randomized trial of Prophage Series vaccine in combination with ipilimumab with a reference to prospective comparative patients treated with ipilimumab only. This redesign may enable us to more quickly evaluate safety and immunologic correlates of responders in patients with metastatic melanoma. While we believe the combination of

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Prophage Series vaccines and ipilimumab has the potential to trigger a more effective immune response against the tumor than ipilimumab alone, there is no guarantee that this trial will be completed or that it will yield useful translational and/or efficacy data.
Changes in our manufacturing strategies, manufacturing problems, or increased demand may cause delays, unanticipated costs, or loss of revenue streams within or across our programs.
Our CPM antibody programs, including those partnered with Incyte, will require substantial manufacturing development and investment to progress. The CPM antibody programs are pre-clinical, and we have only recently initiated the development of the reagents, cell lines and systems required to manufacture our antibody candidates. If these development-stage efforts are delayed or do not produce the desired outcomes, this will cause delays in development timelines and increased costs, which may cause us to limit the size and scope of our efforts and studies. In addition, our staff has limited experience in the manufacture and development of the CPM antibody programs and we have recruited or are recruiting additional staff with expertise in these areas. We also currently utilize consultants and advisors to assist advancing these operations. We rely on contract manufacturing organizations, or CMOs, and contract research organizations, or CROs, to support our CPM antibody programs. In the future, we may need to secure additional manufacturing capacity with our current or additional CMOs. Such an effort could divert resources away from the CPM antibody programs and lead to delays in the development of product candidates. We may also need to develop or secure later phase and/or commercial manufacturing capabilities, all of which would cause us to incur additional costs and risk. In the event that our CPM antibody programs require progressively larger production capabilities, our options for qualified CMOs may become more limited. In addition, while we currently have our own cGMP manufacturing facility in Lexington, MA, our facility is not currently configured or equipped to adequately support manufacturing of the required cell lines or the downstream production of cGMP antibody product candidates.
We currently manufacture our Prophage Series vaccines in our Lexington, MA facility. Manufacturing of the Prophage Series vaccines is complex, and various factors could cause delays or an inability to supply the vaccine. Deviations in the processes controlling manufacture could result in production failures. Furthermore, we have limited financial, personnel, and manufacturing resources and there is no assurance that we will be able to allocate resources necessary for the continued manufacturing of Prophage Series vaccines in light of competing corporate priorities. In addition, regulatory bodies may require us to make our manufacturing facility a single product facility. In such an instance, we would no longer have the ability to manufacture Prophage Series vaccines in addition to other product candidates in our current facility.
We have given our corporate QS-21 Stimulon licensees, GSK and Janssen Ireland Sciences UC, or Janssen, manufacturing rights for QS-21 Stimulon for use in their product programs. If they or their third party contract manufacturers encounter problems with QS-21 Stimulon manufacturing, any of their programs containing QS-21 Stimulon could be delayed or terminated, and this could have an adverse effect on our license fees, milestone payments and royalties that we may otherwise receive from these programs. We have retained the right to manufacture QS-21 for ourselves and third parties, although no other such programs are anticipated to bring us substantial revenues in the near future, if ever.
Our ability to efficiently manufacture our products is contingent upon a CMO’s ability to ramp up production in a timely manner without the benefit of years of experience and familiarity with the processes, which we may not be able to adequately transfer.
We currently rely upon and expect to continue to rely upon third parties, potentially including our collaborators or licensees, to produce materials required to support our product candidates, pre-clinical studies, clinical trials, and commercial efforts. A number of factors could cause production interruptions at either our manufacturing facility or the facilities of our CMOs or suppliers, including equipment malfunctions, labor or employment retention problems, natural disasters, power outages, terrorist activities, or disruptions in the operations of our suppliers. Alternatively, there is the possibility we may have excess manufacturing capacity if product candidates do not progress as planned.
Reliance on third-party manufacturers entails risks to which we would not be subject if we manufactured products ourselves, including reliance on the third party for regulatory compliance, the possibility of breach of the manufacturing agreement by the third party because of factors beyond our control, and the possibility of termination or non-renewal of the agreement by the third party, based on its own business priorities, at a time that is costly or inconvenient for us.
Biopharmaceutical manufacturing is also subject to extensive government regulation. Components of a finished therapeutic product approved for commercial sale or used in late-stage clinical trials must be manufactured in accordance with cGMP. These regulations govern manufacturing processes and procedures (including record keeping) and the implementation and operation of quality systems to control and assure the quality of investigational products and products approved for sale. Our facilities and quality systems and the facilities and quality systems of some or all of our third party contractors must pass a pre-approval inspection for compliance with the applicable regulations as a condition of regulatory approval of product candidates. In addition, facilities are subject to on-going inspections, and minor changes in manufacturing processes may require additional regulatory approvals, either of which could cause us to incur significant additional costs and lose revenue.
Risks associated with doing business internationally could negatively affect our business.

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We have research and development operations in Switzerland and Germany. We have in the past, and may continue to pursue pathways to develop and commercialize our product candidates in non-U.S. jurisdictions. Various risks associated with foreign operations may impact our success. Possible risks of foreign operations include fluctuations in the value of foreign and domestic currencies, disruptions in the import, export, and transportation of patient tumors and our products or product candidates, the product and service needs of foreign customers, difficulties in building and managing foreign relationships, the performance of our licensees or collaborators, geopolitical instability, unexpected regulatory, economic, or political changes in foreign markets and limitations on the flexibility of our operations and costs imposed by local labor laws. For example, our Oncophage® vaccine is approved for sale in Russia, but we have not and do not expect to receive any revenues from sales in Russia. See “Risk Factors- Even if we receive marketing approval for our product candidates, such product approvals could be subject to restrictions or withdrawals. Regulatory requirements are subject to change.”
Our competitors in the biotechnology and pharmaceutical industries may have superior products, manufacturing capability, selling and marketing expertise and/or financial and other resources.
Our product candidates and the product candidates in development by our collaborative partners may fail because of competition from major pharmaceutical companies and specialized biotechnology companies that market products, or that are engaged in the development of product candidates, directed at cancer, infectious diseases and degenerative disorders. Many of our competitors, including large pharmaceutical companies, have greater financial and human resources and more experience than we do. Our competitors may:
commercialize their product candidates sooner than we commercialize our own;
develop safer or more effective therapeutic drugs or preventive vaccines and other therapeutic products;
implement more effective approaches to sales and marketing and capture some of our potential market share;
establish superior intellectual property positions;
discover technologies that may result in medical insights or breakthroughs, which render our drugs or vaccines obsolete, possibly before they generate any revenue, if ever; or
adversely affect our ability to recruit patients for our clinical trials.
There is no guarantee that our products or product candidates will be able to compete with potential future products being developed by our competitors.
We have CPM antibody programs currently in pre-clinical development targeting GITR, OX40, CTLA-4, LAG-3, TIM-3 and PD-1. We are aware of many companies that have antibody-based products on the market or in clinical development that are directed to the same biological target as some of our programs, including, without limitation, the following: (1) Bristol-Myers Squibb markets ipilimumab, an anti-CTLA-4 antibody, and nivolumab, an anti-PD1 antibody, (2) Merck has an approved anti-PD1 antibody in the United States, (3) Ono Pharmaceuticals has an approved anti-PD1 antibody in Japan, (4) Medimmune has anti-CTLA-4, OX-40 and PD1 antibodies in development, (5) Curetech has an anti-PDI antibody in development, and (6) Pfizer has an anti-CTLA-4 antibody in development. Tesaro also has antibody programs targeting PD-1, TIM-3 and LAG-3, which include both monospecific and dual reactive antibody drug candidates. There is no guarantee that our antibody product candidates will be able to compete with those under development by our competitors.
We are aware of compounds that claim to be comparable to QS-21 Stimulon that are being used in clinical trials. Several other vaccine adjuvants are in development and could compete with QS-21 Stimulon for inclusion in vaccines in development. These adjuvants include, but are not limited to, oligonucleotides, under development by Pfizer, Idera, Colby, and Dynavax, MF59, under development by Novartis, IC31, under development by Intercell, and MPL, under development by GSK. In the past, we have provided QS-21 Stimulon to other entities under materials transfer arrangements. In at least one instance, it is possible that this material was used unlawfully to develop synthetic formulations and/or derivatives of QS-21. In addition, companies such as Adjuvance Technologies, Inc., CSL Limited, and Novavax, Inc., as well as academic institutions and manufacturers of saponin extracts, are developing saponin adjuvants, including derivatives and synthetic formulations. These sources may be competitive for our ability to execute future partnering and licensing arrangements involving QS-21 Stimulon. The existence of products developed by these and other competitors, or other products of which we are not aware or which other companies may develop in the future, may adversely affect the marketability of products we develop.
We are also aware of a third party that manufactures pre-clinical material purporting to be comparable to QS-21 Stimulon. The claims being made by this third party may create marketplace confusion and have an adverse effect on the goodwill generated by us and our partners with respect to QS-21 Stimulon. Any diminution of this goodwill may have an adverse effect on our ability to commercialize this technology, either alone or with a third party.

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In competition with our Prophage Series product candidates, Genentech markets bevacizumab, and Eisai and Arbor Pharmaceuticals market carmustine. In addition, TVAX Biomedical and Stemline Therapeutics are developing immunotherapy candidates TVI-Brain-1 and SL-701, respectively, for recurrent glioma. Schering Corporation, a subsidiary of Merck, markets temozolmide for treatment of patients with newly diagnosed glioma. Other companies are developing vaccine candidates for the treatment of patients with newly diagnosed glioma, such as ImmunoCellular Therapeutics (ICT-107), Northwest Biotherapeutics (DC-Vax), Immatics (IMA-950), Activartis Biotech (GBM-Vax), Annias Immunotherapeutics (CMV Vaccine) and Celldex (CDX-110). Other companies may begin development programs as well.
If vaccines from our Prophage Series vaccines are developed in other indications, they could face additional competition in those indications. In addition, and prior to regulatory approval, our Prophage Series vaccines and all of our other product candidates may compete for access to patients with other products in clinical development, with products approved for use in the indications we are studying, or with off-label use of products in the indications we are studying. We anticipate that we will face increased competition in the future as new companies enter markets we seek to address and scientific developments surrounding immunotherapy and other traditional cancer therapies continue to accelerate.
Our future growth depends on our ability to successfully identify, develop, acquire or in-license technologies, products and product candidates; otherwise, we may have limited growth opportunities.
An important part of our business strategy is to continue to develop a pipeline of product candidates by developing, acquiring or in-licensing products, businesses or technologies that we believe are a strategic fit with our existing business. However, these business activities may entail numerous operational and financial risks, including:
difficulty or inability to secure financing to fund development activities for such development, acquisition or in-licensed products or technologies;
incurrence of substantial debt or dilutive issuances of securities to pay for development, acquisition or in-licensing of new technologies, products or product candidates;
disruption of our business and diversion of our management's time and attention;
higher than expected development, acquisition or in-license and integration costs;
exposure to unknown liabilities;
difficulty and cost in combining the technologies, operations and personnel of any acquired businesses with our technologies, operations and personnel, including without limitation, the assets we recently acquired from Celexion, LLC;
inability to retain key employees of any acquired businesses;
difficulty in managing multiple product development programs; and
inability to successfully develop new products or clinical failure.
We have limited resources to identify and execute the development, acquisition or in-licensing of products, businesses and technologies and integrate them into our current infrastructure. We may compete with larger pharmaceutical companies and other competitors in our efforts to establish new collaborations, and/or acquire, in-license, and/or advance new product candidates. These competitors likely will have access to greater financial resources than us and may have greater expertise in identifying and evaluating new opportunities. Moreover, we may devote resources to potential development, acquisitions or in-licensing opportunities that are never completed, or we may fail to realize the anticipated benefits of such efforts.
Failure to enter into and/or maintain significant licensing, distribution and/or collaboration agreements on favorable terms to us may hinder or cause us to cease our efforts to develop and commercialize our product candidates, increase our development timelines, and/or increase our need to rely on partnering or financing mechanisms, such as sales of debt or equity securities, to fund our operations and continue our current and anticipated programs.
As previously noted, our ability to advance our CPM programs depends in part on collaborative agreements such as our collaboration with Incyte. See "Risk Factor - We are dependent upon our collaboration with Incyte to further develop, manufacture and commercialize CPM antibodies against certain targets using our proprietary antibody discovery platforms. If we or Incyte fail to perform as expected, the potential for us to generate future revenues under the collaboration would be significantly reduced, the development and/or commercialization of these CPM antibodies may be terminated or substantially delayed, and our business would be severely harmed." In addition, we have been engaged in efforts to enter into licensing, distribution and/or collaborative agreements with one or more pharmaceutical or biotechnology companies to assist us with development and/or commercialization of our other product candidates. If we are successful in entering into such agreements, we may not be able to negotiate agreements with economic terms similar to those negotiated by other companies. We may not,

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for example, obtain significant upfront payments, substantial royalty rates or milestones. If we fail to enter into any such agreements, our efforts to develop and/or commercialize our products or product candidates may be undermined. In addition, if we do not raise funds through any such agreements, we will need to rely on other financing mechanisms, such as sales of debt or equity securities, to fund our operations. Such financing mechanisms, if available, may not be sufficient or timely enough to advance our programs forward in a meaningful way in the short-term.
While we have been pursuing these business development efforts for several years for our Prophage Series vaccine, we have not entered into a substantial agreement other than the agreement with NewVac which was unsuccessful and expired in 2014. In addition, other companies may not be interested in pursuing patient-specific vaccines like our Prophage Series vaccines, and many other companies have been and may continue to be unwilling to commit to an agreement prior to receipt of additional clinical data, if at all.
Because we rely on collaborators and licensees for the development and commercialization of most of our product candidate programs, these programs may not prove successful, and/or we may not receive significant payments from such parties.
Part of our strategy is to develop and commercialize a majority of our product candidates by continuing or entering into arrangements with academic, government, or corporate collaborators and licensees. Our success depends on our ability to negotiate such agreements on favorable terms and on the success of the other parties in performing research, pre-clinical and clinical testing, completing regulatory applications, and commercializing product candidates. Our research, development, and commercialization efforts with respect to antibody candidates from the Retrocyte Display and SECANT technology platforms are, in part, contingent upon the participation of institutional and corporate collaborators. For example, 4-AB has or has had collaborative arrangements with Ludwig Cancer Research (“LCR”) and Brazil-based Recepta Biopharma SA (“Recepta”), among others. In December 2014, we entered into a new license agreement with LCR, which replaced the prior agreement for some of our target programs. We are in continued discussions with LCR and Recepta with respect to certain of our other target programs. If we are not able to come to agreement on terms or maintain and optimize these arrangements, as well as advance other current or potential collaborations on terms favorable to us, this could have a negative impact on our operations. In February 2015 we began a broad collaboration with Incyte to pursue the discovery and development of CPMs. See “Risk Factors-Risks Related to our Business-We are dependent upon our collaboration with Incyte to further develop, manufacture and commercialize CPM antibodies against certain targets using our proprietary antibody discovery platforms. If we or Incyte fail to perform as expected, the potential for us to generate future revenues under the collaboration would be significantly reduced, the development and/or commercialization of these CPM antibodies may be terminated or substantially delayed, and our business would be severely harmed."
In addition, substantially all product candidates containing QS-21 Stimulon depend on the success of our collaborative partners or licensees, and our relationships with these third parties. Such product candidates depend on our collaborators and licensees successfully enrolling patients and completing clinical trials, being committed to dedicating the resources necessary to advance these product candidates, obtaining regulatory approvals, and successfully manufacturing and commercializing product candidates.
To date, the development of Prophage Series vaccine for the treatment of patients with glioma has been driven by investigator sponsored initiatives, spear-headed in large part by Dr. Andrew Parsa in conjunction with the Alliance for Clinical Trials in Oncology, a National Cancer Institute cooperative group, or NCI, which is sponsoring a Phase 2 clinical trial of this product candidate in this indication. On April 13, 2015, Dr. Andrew Parsa passed away unexpectedly. While several other investigators and the NCI Alliance have supported and expressed they will continue to support the Prophage Series glioma programs, it is possible that these investigator sponsored initiatives could be delayed or even terminated as a result of Dr. Parsa’s passing. Furthermore, when our licensees or third party collaborators sponsor clinical trials using our product candidates, we cannot control the timing of enrollment, data readout, or quality of such trials or related activities. In addition, substantially all product candidates containing QS-21 Stimulon depend on the success of our collaborative partners or licensees, and our relationships with these third parties. Such product candidates depend on our collaborators and licensees successfully enrolling patients and completing clinical trials, being committed to dedicating the resources to advance these product candidates, obtaining regulatory approvals, and successfully manufacturing and commercializing product candidates. We previously granted NewVac an exclusive license to manufacture, market and sell Oncophage ® in the Russian Federation and certain other CIS countries, but the relationship was unsuccessful and expired in 2014 with no benefit to us.
Development activities for our collaborative programs may fail to produce marketable products due to unsuccessful results or abandonment of these programs, failure to enter into future collaborations or license agreements, or the inability to manufacture product supply requirements for our collaborators and licensees. Several of our agreements also require us to transfer important rights and regulatory compliance responsibilities to our collaborators and licensees. As a result of these collaborative agreements, we will not control the nature, timing, or cost of bringing these product candidates to market. Our collaborators and licensees could choose not to, or be unable to, devote resources to these arrangements or adhere to required timelines, or, under certain circumstances, may terminate these arrangements early. They may cease pursuing product

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candidates or elect to collaborate with different companies. In addition, these collaborators and licensees, outside of their arrangements with us, may develop technologies or products that are competitive with those that we are developing. From time to time, we may also become involved in disputes with our collaborators or licensees. Such disputes could result in the incurrence of significant expense, or the termination of collaborations. We may be unable to fulfill all of our obligations to our collaborators, which may result in the termination of collaborations. As a result of these factors, our strategic collaborations may not yield revenue. Furthermore, we may be unable to enter into new collaborations or enter into new collaborations on favorable terms. Failure to generate significant revenue from collaborations could increase our need to fund our operations through sales of debt or equity securities and would negatively affect our business prospects.
Our ability to use net operating loss carryforwards to reduce future tax payments may be limited or restricted.
We have generated significant net operating loss carryforwards, or NOLs, as a result of our incurrence of losses since inception. We generally are able to carry NOLs forward to reduce taxable income in future years. However, our ability to utilize the NOLs is subject to the rules of Section 382 of the Internal Revenue Code of 1986, as amended. Section 382 generally restricts the use of NOLs after an “ownership change.” An ownership change occurs if, among other things, the stockholders (or specified groups of stockholders) who own or have owned, directly or indirectly, 5% or more of a corporation’s common stock or are otherwise treated as 5% stockholders under Section 382 and the United States Treasury Department regulations promulgated thereunder increase their aggregate percentage ownership of that corporation’s stock by more than 50 percentage points over the lowest percentage of the stock owned by these stockholders over the applicable testing period. In the event of an ownership change, Section 382 imposes an annual limitation on the amount of taxable income a corporation may offset with NOL carry forwards. This annual limitation is generally equal to the product of the value of the corporation’s stock on the date of the ownership change, multiplied by the long-term tax-exempt rate published monthly by the Internal Revenue Service. Any unused annual limitation may be carried over to later years until the applicable expiration date for the respective NOL carry forwards. We may have experienced an “ownership change” within the meaning of Section 382 in the past and there can be no assurance that we have not experienced additional ownership changes. As a result, our NOLs may be subject to limitations and we may be required to pay taxes earlier and in larger amounts than would be the case if our NOLs were freely usable. Any such limitation could have a material adverse effect on our results of operations in future years. We have not completed a study to assess whether an ownership change for purposes of Section 382 has occurred, or whether there have been multiple ownership changes since our inception, due to the significant costs and complexities associated with such a study.
Our internal computer systems, or those of our third-party clinical research organizations, licensees, collaborators or other contractors or consultants, may fail or suffer security breaches, which could result in a material disruption in our business and operations.
Despite the implementation of security measures, our internal computer systems and those of our current and future clinical research organizations, licensees, collaborators and other contractors and consultants are vulnerable to damage from computer viruses, unauthorized access, natural disasters, terrorism, war and telecommunication and electrical failures. While we are not aware of any such material system failure, accident or security breach to date, if such an event were to occur and cause interruptions in our operations, it could result in a material disruption of our development programs and our business operations. For example, the loss of clinical trial data from completed, ongoing or future clinical trials could result in delays in our regulatory approval efforts and significant costs to recover or reproduce the data. Likewise, we rely on third parties to manufacture our drug candidates and conduct clinical trials, and similar events relating to their computer systems could also have a material adverse effect on our business. To the extent that any disruption or security breach were to result in a loss of, or damage to, our data or applications, or inappropriate disclosure of confidential or proprietary information, we could incur liabilities and the further development and commercialization of our product candidates could be delayed.
We are highly reliant on our Chief Executive Officer, Chief Scientific Officer and other members of our management team. In addition, we have limited internal resources and if we fail to recruit and/or retain the services of key employees and external consultants as needed, we may not be able to achieve our strategic and operational objectives.
Both Garo H. Armen, Ph.D., the Chairman of our Board of Directors and our Chief Executive Officer who co-founded the Company in 1994, and Dr. Robert Stein, our Chief Scientific Officer who joined the Company in February 2014, are integral to building our company and developing our technology. If either Dr. Armen or Dr. Stein is unable or unwilling to continue his relationship with Agenus, our business may be adversely impacted.
Effective December 31, 2005 we entered into an employment agreement with Dr. Armen. Subject to the earlier termination as provided in the agreement, the agreement had an original term of one year and is automatically extended thereafter for successive terms of one year each, unless either party provides notice to the other at least ninety days prior to the expiration of the original or any extension term. We do not currently have an employment agreement with Dr. Stein. Dr. Armen and Dr. Stein play important roles in our day-to-day activities. We do not carry key employee insurance policies for Dr. Armen, Dr. Stein or any other employee.

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Our future growth success depends to a significant extent on the skills, experience and efforts of our executive officers and key members of our clinical and scientific staff. We face intense competition for qualified individuals from other pharmaceutical, biopharmaceutical and biotechnology companies, as well as academic and other research institutions. We may be unable to retain our current personnel or attract or assimilate other highly qualified management and clinical personnel in the future on acceptable terms. The loss of any or all of these individuals could harm our business and could impair our ability to support our collaboration with Incyte or to support our expected growth. If our management is unable to effectively manage our growth, our expenses may increase more than expected, our ability to generate revenue could be reduced and we may not be able to implement our business strategy.
We rely on a small staff of highly trained and experienced senior management and scientific, administrative and operations personnel and consultants to conduct our business in certain key areas of our organization. 
Reduction in expenses and resulting changes to our compensation and benefit programs have reduced the competitiveness of these programs and thereby increased employee retention risk. The competition for qualified personnel in the biotechnology field is intense, and if we are not able to continue to attract and retain qualified personnel and/or maintain positive relationships with our outside consultants, we may not be able to achieve our strategic and operational objectives.
Risks Related to Regulation of the Biopharmaceutical Industry
The drug development and approval process is uncertain, time-consuming, and expensive.
Clinical development, including pre-clinical testing and the process of obtaining and maintaining regulatory approvals for new therapeutic products, is lengthy, expensive, and uncertain. As of March 31, 2015 , we have spent approximately 20 years and $310.9 million on our research and development program in heat shock proteins for cancer. The development and regulatory approval process also can vary substantially based on the type, complexity, and novelty of the product. We must provide regulatory authorities with manufacturing, product characterization, and pre-clinical and clinical data demonstrating that our product candidates are safe and effective before they can be approved for commercial sale. It may take us many years to complete our testing, and failure can occur at any stage of testing. Interim results of pre-clinical studies or clinical trials do not necessarily predict their final results, and acceptable results in early studies might not be seen in later studies. Any pre-clinical or clinical test may fail to produce results satisfactory to regulatory authorities for many reasons, including but not limited to insufficient product characterization, poor study structure conduct or statistical analysis planning, failure to enroll a sufficient number of patients or failure to prospectively identify the most appropriate patient eligibility criteria, and collectability of data. Pre-clinical and clinical data can be interpreted in different ways, which could delay, limit, or prevent regulatory approval. Negative or inconclusive results from a pre-clinical study or clinical trial, adverse medical events during a clinical trial, or safety issues resulting from products of the same class of drug could require a pre-clinical study or clinical trial to be repeated or cause a program to be terminated, even if other studies or trials relating to the program are successful. We or the FDA, other regulatory agencies, or an institutional review board may suspend or terminate human clinical trials at any time on various grounds.
The timing and success of a clinical trial is dependent on obtaining and maintaining sufficient cash resources, successful production of clinical trial material, enrolling sufficient patients in a timely manner, avoiding serious or significant adverse patient reactions, and demonstrating efficacy of the product candidate in order to support a favorable risk versus benefit profile, among other considerations. The timing and success of our clinical trials, in particular, are also dependent on clinical sites and regulatory authorities accepting each trial's protocol, statistical analysis plan, product characterization tests, and clinical data. In addition, regulatory authorities may request additional information or data that is not readily available. Delays in our ability to respond to such requests would delay, and failure to adequately address concerns would prevent, our commercialization efforts. We have encountered in the past, and may encounter in the future, delays in initiating trial sites and enrolling patients into our clinical trials. Future enrollment delays will postpone the dates by which we expect to complete the impacted trials and the potential receipt of regulatory approval. There is no guarantee we will successfully initiate and/or complete our clinical trials.
Delays or difficulties in obtaining regulatory approvals or clearances for our product candidates may:
    adversely affect the marketing of any products we or our licensees or collaborators develop;
    impose significant additional costs on us or our licensees or collaborators;
    diminish any competitive advantages that we or our licensees or collaborators may attain;
    limit our ability to receive royalties and generate revenue and profits; and
    adversely affect our business prospects and ability to obtain financing.

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Delays or failures in our receiving regulatory approval for our product candidates in a timely manner may result in us having to incur additional development expense and subject us to having to secure additional financing. As a result, we may not be able to commercialize them in the time frame anticipated, and our business will suffer.
Even if we receive marketing approval for our product candidates, such product approvals could be subject to restrictions or withdrawals. Regulatory requirements are subject to change.
Regulatory authorities generally approve products for particular indications. If an approval is for a limited indication, this limitation reduces the size of the potential market for that product. Product approvals, once granted, are subject to continual review and periodic inspections by regulatory authorities. Our operations and practices are subject to regulation and scrutiny by the United States government, as well as governments of any other countries in which we do business or conduct activities. Later discovery of previously unknown problems or safety issues, and/or failure to comply with domestic or foreign laws, knowingly or unknowingly, can result in various adverse consequences, including, among other things, possible delay in approval or refusal to approve a product, warning letters, fines, injunctions, civil penalties, recalls or seizures of products, total or partial suspension of production, refusal of the government to renew marketing applications, complete withdrawal of a marketing application, and/or criminal prosecution, withdrawal of an approved product from the market, and/or exclusion from government health care programs. Such regulatory enforcement could have a direct and negative impact on the product for which approval is granted, but also could have a negative impact on the approval of any pending applications for marketing approval of new drugs or supplements to approved applications.
Because we are a company operating in a highly regulated industry, regulatory authorities could take enforcement action against us in connection with our, or our licensees or collaborators, business and marketing activities for various reasons. For example, the Foreign Corrupt Practices Act prohibits U.S. companies and their representatives from offering, promising, authorizing, or making payments to foreign governmental officials for the purpose of obtaining or retaining business abroad.
From time to time, new legislation is passed into law that could significantly change the statutory provisions governing the approval, manufacturing, and marketing of products regulated by the FDA and other foreign health authorities. Additionally, regulations and guidance are often revised or reinterpreted by health agencies in ways that may significantly affect our business and our products. It is impossible to predict whether further legislative changes will be enacted, or whether regulations, guidance, or interpretations will change, and what the impact of such changes, if any, may be. For example, the Patient Protection and Affordable Care Act and the Health Care and Education Affordability Reconciliation Act of 2010 (collectively, the “ACA”), enacted in March 2010, substantially changed the way healthcare is financed by both governmental and private insurers, and significantly impacted the pharmaceutical industry. With regard to pharmaceutical products, among other things, ACA is expected to expand and increase industry rebates for drugs covered under Medicaid programs and make changes to the coverage requirements under the Medicare D program. We expect both government and private health plans to continue to require healthcare providers, including healthcare providers that may one day purchase our products, to contain costs and demonstrate the value of the therapies they provide.
New data from our research and development activities, and/or resource considerations could modify our strategy and result in the need to adjust our projections of timelines and costs of programs.
Because we are focused on novel technologies, our research and development activities, including our nonclinical studies and clinical trials, involve the ongoing discovery of new facts and the generation of new data, based on which we determine next steps for a relevant program. These developments can occur with varying frequency and constitute the basis on which our business is conducted. We make determinations on an ongoing basis as to which of these facts or data will influence timelines and costs of programs. We may not always be able to make such judgments accurately, which may increase the costs we incur attempting to commercialize our product candidates. We monitor the likelihood of success of our initiatives and we may need to discontinue funding of such activities if they do not prove to be commercially feasible, due to our limited resources.
We may need to successfully address a number of technological challenges in order to complete development of our product candidates. Moreover, these product candidates may not be effective in treating any disease or may prove to have undesirable or unintended side effects, toxicities, or other characteristics that may preclude our obtaining regulatory approvals or prevent or limit commercial use.
Risks Related to Intellectual Property Rights
If we are unable to obtain and enforce patent protection for our product candidates and related technology, our business could be materially harmed.
Issued patents may be challenged, narrowed, invalidated or circumvented. In addition, court decisions may introduce uncertainty in the enforceability or scope of patents owned by biotechnology companies. The legal systems of certain countries do not favor the aggressive enforcement of patents, and the laws of foreign countries may not allow us to protect our inventions with patents to the same extent as the laws of the United States. Because patent applications in the United States and many foreign jurisdictions are typically not published until 18 months after filing, or in some cases not at all, and because

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publications of discoveries in scientific literature lag behind actual discoveries, we cannot be certain that we were the first to make the inventions claimed in our issued patents or pending patent applications, or that we were the first to file for protection of the inventions set forth in our patents or patent applications. As a result, we may not be able to obtain or maintain protection for certain inventions. Therefore, the enforceability and scope of our patents in the United States and in foreign countries cannot be predicted with certainty and, as a result, any patents that we own or license may not provide sufficient protection against competitors. We may not be able to obtain or maintain patent protection from our pending patent applications, from those we may file in the future, or from those we may license from third parties. Moreover, even if we are able to obtain patent protection, such patent protection may be of insufficient scope to achieve our business objectives.
Furthermore, the product development timeline for biotechnology products is lengthy and it is possible that our issued patents covering our product candidates in the United States and other jurisdictions may expire prior to commercial launch.
Our strategy depends on our ability to identify and seek patent protection for our discoveries. This process is expensive and time consuming, and we may not be able to file and prosecute all necessary or desirable patent applications at a reasonable cost or in a timely manner or in all jurisdictions where protection may be commercially advantageous. Despite our efforts to protect our proprietary rights, unauthorized parties may be able to obtain and use information that we regard as proprietary. The issuance of a patent does not ensure that it is valid or enforceable, so even if we obtain patents, they may not be valid or enforceable against third parties. In addition, the issuance of a patent does not give us the right to practice the patented invention. Third parties may have blocking patents that could prevent us from marketing our own patented product and practicing our own patented technology.
The patent landscape in the field of therapeutic antibody development, manufacture and commercialization is crowded. For example, we are aware of third party patents directed to methods for identifying and producing therapeutic antibodies. We are also aware of third party patents directed to antibodies to numerous targets for which we also seek to identify, develop, and commercialize antibodies, including without limitation CTLA-4, PD-1, GITR, OX40, TIM-3, and LAG-3. For example, some patents claim antibodies based on competitive binding with existing antibodies, some claim antibodies based on specifying sequence or other structural information, and some claim various methods of discovery, production, or use of such antibodies. These or other third party patents could impact our freedom to operate in relation to our technology platforms, including Retrocyte Display and SECANT, as well as in relation to development and commercialization of antibodies identified by us as therapeutic candidates. As we discover and develop our candidate antibodies, we will continue to conduct analyses of these third party patents to determine whether we believe we might infringe them, and if so, whether they would be likely to be deemed valid and enforceable if challenged. If we determine that a license for a given patent or family of patents is necessary or desirable, there can be no guarantee that a license would be available on favorable terms, or at all. Inability to obtain a license on favorable terms, should such a license be determined to be necessary or desirable, could, without limitation, result in increased costs to design around the third party patents, delay product launch, or result in cancellation of the affected program or cessation of use of the affected technology.
Third parties may also seek to market biosimilar versions of any approved products. Alternatively, third parties may seek approval to market their own products similar to or otherwise competitive with our products. In these circumstances, we may need to defend and/or assert our patents, including by filing lawsuits alleging patent infringement. In any of these types of proceedings, a court or agency with jurisdiction may find our patents invalid and/or unenforceable. Even if we have valid and enforceable patents, these patents still may not provide protection against competing products or processes sufficient to achieve our business objectives.
We have ownership of or exclusive rights to approximately 60 issued United States patents and approximately 120 issued foreign patents. We also have ownership of or exclusive rights to approximately 13 pending United States patent applications and approximately 40 pending foreign patent applications. However, our patents may not protect us against our competitors. Our patent positions, and those of other pharmaceutical and biotechnology companies, are generally uncertain and involve complex legal, scientific, and factual questions. The standards which the United States Patent and Trademark Office, or USPTO, uses to grant patents, and the standards which courts use to interpret patents, are not always applied predictably or uniformly and can change, particularly as new technologies develop. Consequently, the level of protection, if any, that will be provided by our patents if we attempt to enforce them, and they are challenged, is uncertain. In addition, the type and extent of patent claims that will be issued to us in the future is uncertain. Any patents that are issued may not contain claims that permit us to stop competitors from using similar technology.
Through our acquisitions of 4-AB and certain assets of Celexion, LLC, we also own a number of patents and patent applications directed to various methods and compositions, including methods for identifying therapeutic antibodies and product candidates arising out of such entities' technology platforms. In particular, we own patents and patent applications relating to Retrocyte Display technology platform, a high throughput antibody expression platform for the identification of fully-human and humanized monoclonal antibodies. This patent family is projected to expire between 2029 and 2031. We also own patents and patent applications relating to the SECANT platform, a platform used for the generation of novel monoclonal antibodies and efficient integration of drug targets such as CPMs. This patent family is projected to expire between 2028 and

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2029. In addition, as we advance our research and development efforts with our institutional and corporate collaborators, we intend to seek patent protection for newly-identified therapeutic antibodies and product candidates. We can provide no assurance that any of our patents, including the patents that were acquired along with 4-AB, will have commercial value, or that any of our existing or future patent applications, including the patent applications that were acquired with 4-AB, will result in the issuance of valid and enforceable patents.
The issued patents that cover the Prophage Series vaccines expire at various dates between 2015 and 2024. Our QS-21 Stimulon composition of matter patent family expired in 2008. Additional protection for QS-21 Stimulon in combination with other agents is provided by our other issued patents which expire between 2017 and 2022. We continue to explore means of extending the life cycle of our patent portfolio.
The patent position of pharmaceutical or biotechnology companies, including ours, is generally uncertain and involves complex legal and factual considerations. The standards which the USPTO and its foreign counterparts use to grant patents are not always applied predictably or uniformly and can change. There is also no uniform, worldwide policy regarding the subject matter and scope of claims granted or allowable in pharmaceutical or biotechnology patents. The laws of some foreign countries do not protect proprietary information to the same extent as the laws of the United States, and many companies have encountered significant problems and costs in protecting their proprietary information in these foreign countries. Outside the United States, patent protection must be sought in individual jurisdictions, further adding to the cost and uncertainty of obtaining adequate patent protection outside of the United States. Accordingly, we cannot predict whether additional patents protecting our technology will issue in the United States or in foreign jurisdictions, or whether any patents that do issue will have claims of adequate scope to provide competitive advantage. Moreover, we cannot predict whether third parties will be able to successfully obtain claims or the breadth of such claims. The allowance of broader claims may increase the incidence and cost of patent interference proceedings, opposition proceedings, post-grant review, inter partes review, and/or reexamination proceedings, the risk of infringement litigation, and the vulnerability of the claims to challenge. On the other hand, the allowance of narrower claims does not eliminate the potential for adversarial proceedings, and may fail to provide a competitive advantage. Our issued patents may not contain claims sufficiently broad to protect us against third parties with similar technologies or products, or provide us with any competitive advantage.
Our patent on QS-21 Stimulon composition of matter has expired and we rely primarily on unpatented technology and know-how to protect our rights to QS-21 Stimulon.
Our QS-21 Stimulon composition of matter patent family has expired, and our patent rights are limited to protecting certain combinations of QS-21 Stimulon with other adjuvants or formulations of QS-21 Stimulon with other agents, such as excipients that improve performance of the compound. However, there is no guarantee that a third party would necessarily choose to use QS-21 Stimulon in combination with such adjuvants or formulate it with the other agents covered by our patents. We are aware of other companies that claim to produce material comparable to QS-21 Stimulon. At least one other party has also developed derivatives of QS-21 that have shown biological activity.
Although our licenses also rely on unpatented technology, know-how, and confidential information, these intellectual property rights may not be enforceable in certain jurisdictions, and we may not be able to collect anticipated revenue from our licensees. Any such inability would have a material adverse effect on our business, financial condition and results of operations.
We may become involved in lawsuits to protect or enforce our patents, which could be expensive, time consuming and unsuccessful.
Even after they have been issued, our patents and any patents which we license may be challenged, narrowed, invalidated or circumvented. If our patents are invalidated or otherwise limited or will expire prior to the commercialization of our product candidates, other companies may be better able to develop products that compete with ours, which could adversely affect our competitive business position, business prospects and financial condition.
The following are examples of litigation and other adversarial proceedings or disputes that we could become a party to involving our patents or patents licensed to us:

we or our collaborators may initiate litigation or other proceedings against third parties to enforce our patent rights;

third parties may initiate litigation or other proceedings seeking to invalidate patents owned by or licensed to us or to obtain a declaratory judgment that their product or technology does not infringe our patents or patents licensed to us;

third parties may initiate opposition proceedings, post-grant review, inter partes review, or reexamination proceedings challenging the validity or scope of our patent rights, requiring us or our collaborators and/or licensors to participate in such proceedings to defend the validity and scope of our patents;


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there may be a challenge or dispute regarding inventorship or ownership of patents currently identified as being owned by or licensed to us;

the USPTO may initiate an interference or derivation proceeding between patents or patent applications owned by or licensed to us and those of our competitors, requiring us or our collaborators and/or licensors to participate in an interference or derivation proceeding to determine the priority of invention, which could jeopardize our patent rights; or

third parties may seek approval to market biosimilar versions of our future approved products prior to expiration of relevant patents owned by or licensed to us, requiring us to defend our patents, including by filing lawsuits alleging patent infringement.
These lawsuits and proceedings would be costly and could affect our results of operations and divert the attention of our managerial and scientific personnel. There is a risk that a court or administrative body could decide that our patents are invalid or not infringed by a third party’s activities, or that the scope of certain issued claims must be further limited. An adverse outcome in a litigation or proceeding involving our own patents could limit our ability to assert our patents against these or other competitors, affect our ability to receive royalties or other licensing consideration from our licensees, and may curtail or preclude our ability to exclude third parties from making, using and selling similar or competitive products. Any of these occurrences could adversely affect our competitive business position, business prospects and financial condition.
The degree of future protection for our proprietary rights is uncertain because legal means afford only limited protection and may not adequately protect our rights or permit us to gain or keep our competitive advantage. For example:

others may be able to develop a platform that is similar to, or better than, ours in a way that is not covered by the claims of our patents;

others may be able to make compounds that are similar to our product candidates but that are not covered by the claims of our patents;

we might not have been the first to make the inventions covered by patents or pending patent applications;

we might not have been the first to file patent applications for these inventions;

any patents that we obtain may not provide us with any competitive advantages or may ultimately be found invalid or unenforceable; or

we may not develop additional proprietary technologies that are patentable.
Our commercial success depends significantly on our ability to operate without infringing the patents and other proprietary rights of third parties.
Our success will depend in part on our ability to operate without infringing the proprietary rights of third parties. Other entities may have or obtain patents or proprietary rights that could limit our ability to make, use, sell, offer for sale or import our future approved products or impair our competitive position. In particular the patent landscape around the discovery, development, manufacture and commercial use of our six pre-clinical CPM antibody programs and therapeutic antibodies is crowded.
Patents that we own may ultimately be found to infringe patents issued to third parties. Third parties may have or obtain valid and enforceable patents or proprietary rights that could block us from developing product candidates using our technology. Our failure to obtain a license to any technology that we require may materially harm our business, financial condition and results of operations. Moreover, our failure to maintain a license to any technology that we require may also materially harm our business, financial condition, and results of operations. Furthermore, we would be exposed to a threat of litigation.
In the biopharmaceutical industry, significant litigation and other proceedings regarding patents, patent applications, trademarks and other intellectual property rights have become commonplace. The types of situations in which we may become a party to such litigation or proceedings include:

we or our collaborators may initiate litigation or other proceedings against third parties seeking to invalidate the patents held by those third parties or to obtain a judgment that our products or processes do not infringe those third parties’ patents;


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if our competitors file patent applications that claim technology also claimed by us or our licensors, we or our licensors may be required to participate in interference, derivation or other proceedings to determine the priority of invention, which could jeopardize our patent rights and potentially provide a third party with a dominant patent position;

if third parties initiate litigation claiming that our processes or products infringe their patent or other intellectual property rights, we and our collaborators will need to defend against such proceedings; and

if a license to necessary technology is terminated, the licensor may initiate litigation claiming that our processes or products infringe or misappropriate their patent or other intellectual property rights and/or that we breached our obligations under the license agreement, and we and our collaborators would need to defend against such proceedings.
These lawsuits would be costly and could affect our results of operations and divert the attention of our management and scientific personnel. There is a risk that a court would decide that we or our collaborators are infringing the third party’s patents and would order us or our collaborators to stop the activities covered by the patents. In that event, we or our collaborators may not have a viable alternative to the technology protected by the patent and may need to halt work on the affected product candidate or cease commercialization of an approved product. In addition, there is a risk that a court will order us or our collaborators to pay the other party damages. An adverse outcome in any litigation or other proceeding could subject us to significant liabilities to third parties and require us to cease using the technology that is at issue or to license the technology from third parties. We may not be able to obtain any required licenses on commercially acceptable terms or at all. Any of these outcomes could have a material adverse effect on our business.
The biopharmaceutical industry has produced a significant number of patents, and it may not always be clear to industry participants, including us, which patents cover various types of products or methods of use. The coverage of patents is subject to interpretation by the courts, and the interpretation is not always uniform or predictable. If we are sued for patent infringement, we would need to demonstrate that our products or methods either do not infringe the patent claims of the relevant patent or that the patent claims are invalid, and we may not be able to do this. Proving invalidity is difficult. For example, in the United States, proving invalidity requires a showing of clear and convincing evidence to overcome the presumption of validity enjoyed by issued patents. Even if we are successful in these proceedings, we may incur substantial costs and divert management’s time and attention in pursuing these proceedings, which could have a material adverse effect on us. If we are unable to avoid infringing the patent rights of others, we may be required to seek a license, defend an infringement action or challenge the validity of the patents in court. Patent litigation is costly and time consuming. We may not have sufficient resources to bring these actions to a successful conclusion. In addition, if we do not obtain a license, develop or obtain non-infringing technology, fail to defend an infringement action successfully or have infringed patents declared invalid, we may incur substantial monetary damages, encounter significant delays in bringing our product candidates to market and be precluded from manufacturing or selling our product candidates.
The cost of any patent litigation or other proceeding, even if resolved in our favor, could be substantial. Some of our competitors may be able to sustain the cost of such litigation and proceedings more effectively than we can because of their substantially greater resources. Uncertainties resulting from the initiation and continuation of patent litigation or other proceedings could have a material adverse effect on our ability to compete in the marketplace. Patent litigation and other proceedings may also absorb significant management time.
If we fail to comply with our obligations under our intellectual property licenses with third parties, we could lose license rights that are important to our business.
We are currently party to various intellectual property license agreements. These license agreements impose, and we expect that future license agreements may impose, various diligence, milestone payment, royalty, insurance and other obligations on us. These licenses typically include an obligation to pay an upfront payment, yearly maintenance payments and royalties on sales. If we fail to comply with our obligations under the licenses, the licensors may have the right to terminate their respective license agreements, in which event we might not be able to market any product that is covered by the agreements. Termination of the license agreements or reduction or elimination of our licensed rights may result in our having to negotiate new or reinstated licenses with less favorable terms, which could adversely affect our competitive business position and harm our business.
If we are unable to protect the confidentiality of our proprietary information, the value of our technology and products could be adversely affected.
In addition to patent protection, we also rely on other proprietary rights, including protection of trade secrets, and other proprietary information. To maintain the confidentiality of trade secrets and proprietary information, we enter into confidentiality agreements with our employees, consultants, collaborators and others upon the commencement of their relationships with us. These agreements require that all confidential information developed by the individual or made known to the individual by us during the course of the individual’s relationship with us be kept confidential and not disclosed to third

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parties. Our agreements with employees and our personnel policies also provide that any inventions conceived by the individual in the course of rendering services to us shall be our exclusive property. However, we may not obtain these agreements in all circumstances, and individuals with whom we have these agreements may not comply with their terms. Thus, despite such agreement, such inventions may become assigned to third parties. In the event of unauthorized use or disclosure of our trade secrets or proprietary information, these agreements, even if obtained, may not provide meaningful protection, particularly for our trade secrets or other confidential information. To the extent that our employees, consultants or contractors use technology or know-how owned by third parties in their work for us, disputes may arise between us and those third parties as to the rights in related inventions. To the extent that an individual who is not obligated to assign rights in intellectual property to us is rightfully an inventor of intellectual property, we may need to obtain an assignment or a license to that intellectual property from that individual, or a third party or from that individual’s assignee. Such assignment or license may not be available on commercially reasonable terms or at all.
Adequate remedies may not exist in the event of unauthorized use or disclosure of our proprietary information. The disclosure of our trade secrets would impair our competitive position and may materially harm our business, financial condition and results of operations. Costly and time consuming litigation could be necessary to enforce and determine the scope of our proprietary rights, and failure to maintain trade secret protection could adversely affect our competitive business position. In addition, others may independently discover or develop our trade secrets and proprietary information, and the existence of our own trade secrets affords no protection against such independent discovery.
As is common in the biopharmaceutical industry, we employ individuals who were previously or concurrently employed at research institutions and/or other biotechnology or pharmaceutical companies, including our competitors or potential competitors. We may be subject to claims that these employees, or we, have inadvertently or otherwise used or disclosed trade secrets or other proprietary information of their former employers, or that patents and applications we have filed to protect inventions of these employees, even those related to one or more of our product candidates, are rightfully owned by their former or concurrent employer. Litigation may be necessary to defend against these claims. Even if we are successful in defending against these claims, litigation could result in substantial costs and be a distraction to management.
Obtaining and maintaining our patent protection depends on compliance with various procedural, documentary, fee payment and other requirements imposed by governmental patent agencies, and our patent protection could be reduced or eliminated for non-compliance with these requirements.
Periodic maintenance fees, renewal fees, annuity fees and various other governmental fees on patents and/or applications will be due to the USPTO and various foreign patent offices at various points over the lifetime of our patents and/or applications. We have systems in place to remind us to pay these fees, and we rely on our outside counsel or service providers to pay these fees when due. Additionally, the USPTO and various foreign patent offices require compliance with a number of procedural, documentary, fee payment and other similar provisions during the patent application process. We employ reputable law firms and other professionals to help us comply, and in many cases, an inadvertent lapse can be cured by payment of a late fee or by other means in accordance with rules applicable to the particular jurisdiction. However, there are situations in which noncompliance can result in abandonment or lapse of the patent or patent application, resulting in partial or complete loss of patent rights in the relevant jurisdiction. If such an event were to occur, it could have a material adverse effect on our business. In addition, we are responsible for the payment of patent fees for patent rights that we have licensed from other parties. If any licensor of these patents does not itself elect to make these payments, and we fail to do so, we may be liable to the licensor for any costs and consequences of any resulting loss of patent rights.
Risks Related to Litigation
We may face litigation that could result in substantial damages and may divert management's time and attention from our business.
From time to time we may become a party to legal proceedings, claims and investigations that arise in the ordinary course of business such as, but not limited to, patent, employment, commercial and environmental matters. While we currently believe that the ultimate outcome of any of these proceedings will not have a material adverse effect on our financial position, results of operations, or liquidity, litigation is subject to inherent uncertainty. Furthermore, litigation consumes both cash and management attention.
We maintain property and general commercial insurance coverage as well as errors and omissions and directors and officers insurance policies. This insurance coverage may not be sufficient to cover us for future claims.
We are also exposed to the risk of employee fraud or other misconduct. Misconduct by employees could include intentional failures to comply with FDA regulations, to provide accurate information to the FDA, to comply with manufacturing standards we have established, to comply with federal and state health-care fraud and abuse laws and regulations, to report financial information or data accurately or to disclose unauthorized activities to us. In particular, sales, marketing and business arrangements in the healthcare industry are subject to extensive laws and regulations intended to prevent fraud, kickbacks, self-

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dealing and other abusive practices. These laws and regulations may restrict or prohibit a wide range of pricing, discounting, marketing and promotion, sales commission, customer incentive programs and other business arrangements.
Employee misconduct could also involve the improper use of information obtained in the course of clinical trials, which could result in regulatory sanctions and serious harm to our reputation. In addition, during the course of our operations, our directors, executives and employees may have access to material, nonpublic information regarding our business, our results of operations or potential transactions we are considering. We may not be able to prevent a director, executive or employee from trading in our common stock on the basis of, or while having access to, material, nonpublic information. If a director, executive or employee was to be investigated, or an action was to be brought against a director, executive or employee for insider trading, it could have a negative impact on our reputation and our stock price. Such a claim, with or without merit, could also result in substantial expenditures of time and money, and divert attention of our management team.
Product liability and other claims against us may reduce demand for our products and/or result in substantial damages.
We face an inherent risk of product liability exposure related to testing our product candidates in human clinical trials and may face even greater risks if we sell Oncophage ® in Russia or our other product candidates commercially. An individual may bring a product liability claim against us if one of our product candidates causes, or merely appears to have caused, an injury. Product liability claims may result in:
    decreased demand for our product candidates;
    regulatory investigations;
    injury to our reputation;
    withdrawal of clinical trial volunteers;
    costs of related litigation; and
    substantial monetary awards to plaintiffs.
We manufacture the Prophage Series vaccines from a patient's cancer cells, and medical professionals must inject the vaccines into the same patient from which they were manufactured. A patient may sue us if a hospital, a shipping company, or we fail to receive the removed cancer tissue or deliver that patient's vaccine. We anticipate that the logistics of shipping will become more complex if the number of patients we treat increases and that shipments of tumor and/or vaccines may be lost, delayed, or damaged. Additionally, complexities unique to the logistics of commercial products may delay shipments and limit our ability to move commercial product in an efficient manner without incident. We do not have any other insurance that covers loss of or damage to the Prophage Series vaccines or tumor material, and we do not know whether such insurance will be available to us at a reasonable price or at all. We have limited product liability coverage for use of our product candidates. Our product liability policy provides $10.0 million aggregate coverage and $10.0 million per occurrence coverage. This limited insurance coverage may be insufficient to fully cover us for future claims.
We are also subject to laws generally applicable to businesses, including but not limited to, federal, state and local wage and hour, employee classification, mandatory healthcare benefits, unlawful workplace discrimination and whistle-blowing. Any actual or alleged failure to comply with any regulation applicable to our business or any whistle-blowing claim, even if without merit, could result in costly litigation, regulatory action or otherwise harm our business, results of operations, financial condition, cash flow and future prospects.
If we do not comply with environmental laws and regulations, we may incur significant costs and potential disruption to our business.
We use or may use hazardous, infectious, and radioactive materials, and recombinant DNA in our operations, which have the potential of being harmful to human health and safety or the environment. We store these hazardous (flammable, corrosive, toxic), infectious, and radioactive materials, and various wastes resulting from their use, at our facilities pending use and ultimate disposal. We are subject to a variety of federal, state, and local laws and regulations governing use, generation, storage, handling, and disposal of these materials. We may incur significant costs complying with both current and future environmental health and safety laws and regulations. In particular, we are subject to regulation by the Occupational Safety and Health Administration, the Environmental Protection Agency, the Drug Enforcement Agency, the Department of Transportation, the Centers for Disease Control and Prevention, the National Institutes of Health, the International Air Transportation Association, and various state and local agencies. At any time, one or more of the aforementioned agencies could adopt regulations that may affect our operations. We are also subject to regulation under the Toxic Substances Control Act and the Resource Conservation Development programs.
Although we believe that our current procedures and programs for handling, storage, and disposal of these materials comply with federal, state, and local laws and regulations, we cannot eliminate the risk of accidents involving contamination from these materials. Although we have a workers' compensation liability policy, we could be held liable for resulting damages

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in the event of an accident or accidental release, and such damages could be substantially in excess of any available insurance coverage and could substantially disrupt our business.
Risks Related to our Common Stock
Provisions in our organizational documents could prevent or frustrate attempts by stockholders to replace our current management.
Our certificate of incorporation and bylaws contain provisions that could make it more difficult for a third party to acquire us without the consent of our Board of Directors. Our certificate of incorporation provides for a staggered board and removal of directors only for cause. Accordingly, stockholders may elect only a minority of our Board at any annual meeting, which may have the effect of delaying or preventing changes in management. In addition, under our certificate of incorporation, our Board of Directors may issue additional shares of preferred stock and determine the terms of those shares of stock without any further action by our stockholders. Our issuance of additional preferred stock could make it more difficult for a third party to acquire a majority of our outstanding voting stock and thereby effect a change in the composition of our Board of Directors. Our certificate of incorporation also provides that our stockholders may not take action by written consent. Our bylaws require advance notice of stockholder proposals and director nominations and permit only our president or a majority of the Board of Directors to call a special stockholder meeting. These provisions may have the effect of preventing or hindering attempts by our stockholders to replace our current management. In addition, Delaware law prohibits a corporation from engaging in a business combination with any holder of 15% or more of its capital stock until the holder has held the stock for three years unless, among other possibilities, the board of directors approves the transaction. Our Board of Directors may use this provision to prevent changes in our management. Also, under applicable Delaware law, our Board of Directors may adopt additional anti-takeover measures in the future.
The first right to negotiate provision contained in our agreement with one of our licensees could hinder or delay a change of control of our company or the sale of certain of our assets.
We have entered into a First Right to Negotiate and Amendment Agreement with GSK that affords GSK, one of our licensees, a first right to negotiate with us in the event we determine to initiate a process to effect a change of control of our company with, or to sell certain of our assets to, an unaffiliated third party or in the event that a third party commences an unsolicited tender offer seeking a change of control of our company. In such event, we must provide GSK a period of time to determine whether it wishes to negotiate the terms of such a transaction with us. If GSK affirmatively so elects, we are required to negotiate with GSK in good faith towards effecting a transaction of that nature for a specified period. During the negotiation period, we are obligated not to enter into a definitive agreement with a third party that would preclude us from negotiating and/or executing a definitive agreement with GSK. If GSK determines not to negotiate with us or we are unable to come to an agreement with GSK during this period, we may enter into the specified change of control or sale transaction within the following 12 months, provided that such a transaction is not on terms in the aggregate that are materially less favorable to us and our stockholders (as determined by our Board of Directors, in its reasonable discretion) than terms last offered to us by GSK in a binding written proposal during the negotiation period. The first right to negotiate terminates on March 2, 2017. Although GSK's first right to negotiate does not compel us to enter into a transaction with GSK nor prevent us from negotiating with or entering into a transaction with a third party, the first right to negotiate could inhibit a third party from engaging in discussions with us concerning such a transaction or delay our ability to effect such a transaction with a third party.
Our stock has historically had low trading volume, and its public trading price has been volatile.
For the period from our initial public offering on February 4, 2000 to March 31, 2015 , and for the three months ended March 31, 2015 , the closing price of our common stock has fluctuated between $1.80 (or $0.30 pre-reverse stock split) and $315.78 (or $52.63 pre-reverse stock split) per share and $3.91 and $6.17 per share, respectively. The average daily trading volume for the three months ended March 31, 2015 was approximately 2,176,000 shares while the average daily trading volume for the year ended December 31, 2014 was approximately 728,000. The market may experience significant price and volume fluctuations that are often unrelated to the operating performance of individual companies. In addition to general market volatility, many factors may have a significant adverse effect on the market price of our stock, including:
continuing operating losses, which we expect over the next several years as we continue our development activities;
announcements of decisions made by public officials;
results of our pre-clinical studies and clinical trials;
announcements of new collaboration agreements with strategic partners or developments by our existing collaborative partners;
announcements of acquisitions;

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announcements of technological innovations, new commercial products, failures of products, or progress toward commercialization by our competitors or peers;
failure to realize the anticipated benefits of acquisitions, including our acquisition of 4-AB and certain assets from Celexion, LLC;
developments concerning proprietary rights, including patent and litigation matters;
publicity regarding actual or potential results with respect to product candidates under development;
quarterly fluctuations in our financial results;
variations in the level of expenses related to any of our product candidates or clinical development programs;
additions or departures of key management or scientific personnel;
conditions or trends in the biotechnology and biopharmaceutical industries;
other events or factors, including those resulting from war, incidents of terrorism, natural disasters or responses to these events;
changes in accounting principles;
general economic and market conditions and other factors that may be unrelated to our operating performance or the operating performance of our competitors, including changes in market valuations of similar companies; and
sales of common stock by us or our stockholders in the future, as well as the overall trading volume of our common stock.
In the past, securities class action litigation has often been brought against a company following a significant decline in the market price of its securities. This risk is especially relevant for us because biotechnology and pharmaceutical companies generally experience significant stock price volatility.
The trading market for our common stock will depend in part on the research and reports that securities or industry analysts publish about us or our business. If one or more of the analysts who covers us downgrades our stock, or publishes inaccurate or unfavorable research about our business, our stock price would likely decline. If one or more of these analysts ceases coverage of us or fails to publish reports on us regularly, demand for our stock could decrease, which could cause our stock price and trading volume to decline.
The sale of a significant number of shares could cause the market price of our stock to decline.
The sale by us or the resale by stockholders of a significant number of shares of our common stock could cause the market price of our common stock to decline. As of March 31, 2015 , we had 70,836,180 shares of common stock outstanding. All of these shares are eligible for sale on Nasdaq, although certain of the shares are subject to sales volume and other limitations. As of March 31, 2015 , we had filed registration statements to permit the sale of approximately 12,200,000 shares of common stock under our equity incentive plans. We have also filed registration statements to permit the sale of approximately 167,000 shares of common stock under our employee stock purchase plan, to permit the sale of 225,000 shares of common stock under our Directors' Deferred Compensation Plan, to permit the sale of approximately 8,274,000 shares of common stock pursuant to various private placement agreements and to permit the sale of approximately 10,000,000 shares of our common stock pursuant to our At Market Issuance Sales Agreement. As of March 31, 2015 , an aggregate of approximately 22.0 million of these shares remain available for sale. Contingent milestone payments, payable in cash or shares of our common stock at our option, will be due to the former shareholders of 4-AB as follows (i) $10 million upon our market capitalization exceeding $750 million for 30 consecutive trading days prior to the earliest of (a) the tenth anniversary of the Closing Date (b) the sale of 4-AB or (c) the sale of Agenus and (ii) $10 million upon our market capitalization exceeding $1.0 billion for 30 consecutive trading days prior to the earliest of (a) the tenth anniversary of the Closing Date, (b) the sale of 4-AB or (c) the sale of Agenus. In addition, as additional consideration for purchased assets, we agreed to pay to Celexion $4.0 million on each of the 12-month and 24-month anniversaries of the Closing Date payable at our discretion in cash, shares of our common stock, or any combination thereof. We intend to file one or more registration statements covering the resale of shares of our common stock held by certain of our stockholders or investors in 2015. We are also obligated to file registration statements covering any additional shares that may be issued to Celexion in the future pursuant to the terms of our agreement with Celexion.
As of March 31, 2015 , warrants to purchase approximately 4,351,450 shares of our common stock with a weighted average exercise price per share of $9.01 were outstanding.
As of March 31, 2015 , options to purchase 7,834,555 shares of our common stock with a weighted average exercise price per share of $4.56 were outstanding. These options are subject to vesting that occurs over a period of up to four years following the date of grant. As of March 31, 2015 we have 67,578 nonvested shares outstanding.

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We may issue additional common stock, preferred stock, restricted stock units, or securities convertible into or exchangeable for our common stock. Furthermore, substantially all shares of common stock for which our outstanding stock options or warrants are exercisable are, once they have been purchased, eligible for immediate sale in the public market. The issuance of additional common stock, preferred stock, restricted stock units, or securities convertible into or exchangeable for our common stock or the exercise of stock options or warrants would dilute existing investors and could adversely affect the price of our securities. In addition, such securities may have rights senior to the rights of securities held by existing investors.
We do not intend to pay dividends on our common stock and, consequently your ability to obtain a return on your investment will depend on appreciation in the price of our common stock.
 We have never declared or paid any cash dividend on our common stock and do not intend to do so in the foreseeable future. We currently anticipate that we will retain future earnings for the development, operation and expansion of our business. Therefore, the success of an investment in shares of our common stock will depend upon any future appreciation in their value. There is no guarantee that shares of our common stock will appreciate in value or maintain their current value.
Failure to maintain effective internal controls in accordance with Section 404 of the Sarbanes-Oxley Act of 2002 and to comply with changing regulation of corporate governance and public disclosure could have a material adverse effect on our operating results and the price of our common stock.
The Sarbanes-Oxley Act of 2002 and rules adopted by the SEC and Nasdaq have resulted in significant costs to us. In particular, our efforts to comply with Section 404 of the Sarbanes-Oxley Act of 2002 and related regulations regarding the required assessment of our internal control over financial reporting, and our independent registered public accounting firm's audit of internal control over financial reporting, have required commitments of significant management time. We expect these commitments to continue.
Our internal control over financial reporting (as defined in Rules 13a-15 of the Exchange Act) is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of our consolidated financial statements for external purposes in accordance with U.S. GAAP. Because of its inherent limitations, internal control over financial reporting may not prevent or detect all deficiencies or weaknesses in our financial reporting. While our management has concluded that there were no material weaknesses in our internal control over financial reporting as of December 31, 2014 , our procedures are subject to the risk that our controls may become inadequate because of changes in conditions or as a result of a deterioration in compliance with such procedures. No assurance is given that our procedures and processes for detecting weaknesses in our internal control over financial reporting will be effective.
We anticipate additional commitments of management time to ensure that our internal control over financial reporting of the operations of 4-AB complies with Section 404 of the Sarbanes-Oxley Act of 2002. Prior to the acquisition, 4-AB was a privately held company organized under the laws of Switzerland and, as such, it had not been subject to financial reporting requirements applicable to public companies and was not required to prepare and publish audited financial statements in accordance with U.S. GAAP. Accordingly, our on-going efforts to ensure that our internal control over the financial reporting of the operations of 4-AB will cause us to incur significant additional costs.
Changing laws, regulations and standards relating to corporate governance and public disclosure, are creating uncertainty for companies. Laws, regulations and standards are subject to varying interpretations in some cases due to their lack of specificity, and as a result, their application in practice may evolve over time as new guidance is provided, which could result in continuing uncertainty regarding compliance matters and higher costs caused by ongoing revisions to disclosure and governance practices. If we fail to comply with these laws, regulations and standards, our reputation may be harmed and we might be subject to sanctions or investigation by regulatory authorities, such as the SEC. Any such action could adversely affect our operating results and the market price of our common stock.
Item 2.
Unregistered Sales of Equity Securities and Use of Proceeds

On January 10, 2014, we entered into a share exchange agreement (the “Share Exchange Agreement”) with 4-Antibody AG, a joint stock company formed under the laws of Switzerland (“4-AB”), the former shareholders of 4-AB, and Vischer AG, as Representative, pursuant to which we acquired all of the outstanding capital stock of 4-AB from the former shareholders of 4-AB in an all-stock transaction that closed in February 2014. Pursuant to the terms of the Share Exchange Agreement, we agreed to assume certain of 4-AB’s pre-closing obligations, including the payment of exit bonuses to certain employees and former shareholders of 4-AB upon the achievement of milestone events contemplated by the Share Exchange Agreement. In January 2015, the first contingent milestone was met, and we were obligated to pay an aggregate of $20.0 million to the former shareholders of 4-AB, certain 4-AB advisors and employees. Three of the individuals entitled to payments resulting from the first contingent milestone elected to receive their payments in shares of our common stock. Accordingly, on March 30, 2015, we issued 50,596 shares of our common stock (the “Exit Bonus Shares”) to these individuals valued at an aggregate of approximately $217,000, or approximately $4.28 per share.


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The issuance of the Exit Bonus Shares was not registered under the Securities Act of 1933, as amended (the "Securities Act") in reliance upon the exemptions from registration provided by Regulation S promulgated under the Securities Act, based on representations from the recipients that they are not "U.S. persons" within the meaning of Rule 902 of Regulation S, Section (4)2 of the Securities Act, because the transaction did not involve any public offering.

Item 6.
Exhibits

The Exhibits listed in the Exhibit Index are included in this Quarterly Report on Form 10-Q.

(b) Exhibits




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AGENUS INC.
SIGNATURES
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.
 
 
 
 
Date:
May 1, 2015
AGENUS INC.
 
 
 
 
/s/    CHRISTINE M. KLASKIN
 
 
Christine M. Klaskin
VP, Finance, Principal Financial Officer, Principal Accounting Officer


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Exhibit Index
Exhibit No.
 
Description
 
 
 
3.1
 
Amended and Restated Certificate of Incorporation of Antigenics Inc. Filed as Exhibit 3.1 to our Current Report on Form 8-K (File No. 000-29089) filed on June 10, 2002 and incorporated herein by reference.
 
 
 
3.1.1
 
Certificate of Amendment to the Amended and Restated Certificate of Incorporation of Antigenics Inc. Filed as Exhibit 3.1 to our Current Report on Form 8-K (File No. 000-29089) filed on June 11, 2007 and incorporated herein by reference.
 
 
 
3.1.2
 
Certificate of Ownership and Merger changing the name of the corporation to Agenus Inc. Filed as Exhibit 3.1 to our Current Report on Form 8-K (File No. 000-29089) filed on January 6, 2011 and incorporated herein by reference.
 
 
 
3.1.3
 
Certificate of Second Amendment to the Amended and Restated Certificate of Incorporation of Agenus Inc. Filed as Exhibit 3.1 to our Current Report on Form 8-K (File No. 000-29089) filed on September 30, 2011 and incorporated herein by reference.
 
 
 
3.1.4
 
Certificate of Third Amendment to the Amended and Restated Certificate of Incorporation of Agenus Inc. Filed as Exhibit 3.1.4 to our Quarterly Report on Form 10-Q (File No. 000-29089) for the quarter ended June 30, 2012 and incorporated herein by reference.
 
 
 
3.1.5
 
Certificate of Fourth Amendment to the Amended and Restated Certificate of Incorporation of Agenus Inc. Filed as Exhibit 3.1 to our Current Report on Form 8-K (File No. 000-29089) filed on April 25, 2014 and incorporated herein by reference.
 
 
 
3.2
 
Fifth Amended and Restated By-laws of Agenus Inc. Filed as Exhibit 3.2 to our Current Report on Form 8-K (File No. 000-29089) filed on January 6, 2011 and incorporated herein by reference.
 
 
 
3.3
 
Certificate of Designation, Preferences and Rights of the Series A Convertible Preferred Stock of Agenus Inc. filed with the Secretary of State of the State of Delaware on September 24, 2003. Filed as Exhibit 3.1 to our Current Report on Form 8-K (File No. 000-29089) filed on September 25, 2003 and incorporated herein by reference.
 
 
 
3.4
 
Certificate of Designations, Preferences and Rights of the Class B Convertible Preferred Stock of Agenus Inc. Filed as Exhibit 3.1 to our Current Report on Form 8-K (File No. 000-29089) filed on September 5, 2007 and incorporated herein by reference.
 
 
 
3.5
 
Certificate of Designations, Preferences and Rights of the Series A-1 Convertible Preferred Stock of Agenus Inc. Filed as Exhibit 3.1 to our Current Report on Form 8-K (File No. 000-29089) filed on February 5, 2013 and incorporated herein by reference.
 
 
 
4.1
 
Stock Purchase Agreement dated as of January 9, 2015, by and between Agenus Inc. and Incyte Corporation. Filed as Exhibit 4.21 to our Annual Report on Form 10-K (File No. 000-29089) for the year ended December 31, 2014 and incorporated herein by reference.

 
 
 
4.2(1)
 
Amended and Restated Note Purchase Agreement dated as of February 20, 2015, as amended, by and between Agenus Inc. and the Purchasers listed on Schedule 1.1 thereto. Filed herewith.
 
 
 
4.3
 
Form of Senior Subordinated Note under the Amended and Restated Note Purchase Agreement dated as of February 20, 2015, as amended, by and between Agenus Inc. and the Purchasers listed on Schedule 1.1 thereto. Filed herewith.
 
 
 
4.4
 
Form of Warrant under the Amended and Restated Note Purchase Agreement dated as of February 20, 2015, as amended, by and between Agenus Inc. and the Purchasers listed on Schedule 1.1 thereto. Filed herewith.
 
 
 
10.1(1)
 
License, Development and Commercialization Agreement dated as of January 9, 2015 by and among Agenus Inc., 4-Antibody AG, a limited liability company organized under the laws of Switzerland (and wholly-owned subsidiary of Agenus Inc.), Incyte Corporation and Incyte Europe Sarl, a Swiss limited liability company (and wholly-owned subsidiary of Incyte Corporation). Filed as Exhibit 10.22 to our Annual Report on Form 10-K (File No. 000-29089) for the year ended December 31, 2014 and incorporated herein by reference.

 
 
 
31.1
 
Certification of Principal Executive Officer pursuant to Rules 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934, as amended. Filed herewith.
 
 
 

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31.2
 
Certification of Principal Financial Officer pursuant to Rules 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934, as amended. Filed herewith.
 
 
 
32.1
 
Certification of Principal Executive Officer and Principal Financial Officer pursuant to 18 U.S.C. Section 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002. Submitted herewith.
 
 
 
101.INS
 
XBRL Instance Document
 
 
 
101.SCH
 
XBRL Taxonomy Extension Schema Document
 
 
 
101.CAL
 
XBRL Calculation Linkbase Document
 
 
 
101.DEF
 
XBRL Taxonomy Extension Definition Linkbase Document
 
 
 
101.LAB
 
XBRL Label Linkbase Document
 
 
 
101.PRE
 
XBRL Taxonomy Presentation Linkbase Document

(1) Certain confidential material contained in the document has been omitted and filed separately with the Securities and Exchange Commission pursuant to Rule 406 of the Securities Act or Rule 24b -2 of the Securities Exchange Act.



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EXHIBIT 4.2
CONFIDENTIAL TREATMENT MATERIAL

CONFIDENTIAL TREATMENT REQUESTED: Information for which confidential treatment has been requested is omitted and is noted with asterisks. An unredacted version of this document has been filed separately with the Securities and Exchange Commission (the “Commission”).

__________________________________________________________________

AMENDED AND RESTATED NOTE PURCHASE AGREEMENT
by and among
AGENUS INC.,
and
the PURCHASERS named herein
Dated: February 20, 2015
Amended: February 25, 2015
__________________________________________________________________

Senior Subordinated Notes
due February 20, 2018
Warrants to purchase Common Stock
of Agenus Inc.




AMENDED AND RESTATED NOTE PURCHASE AGREEMENT
THIS AMENDED AND RESTATED NOTE PURCHASE AGREEMENT (as amended, restated, supplemented or otherwise modified from time to time, and including all exhibits and schedules hereto, this “ Agreement ”) is entered into as of February 20, 2015 by and among AGENUS INC., a Delaware corporation (the “ Borrower ”) and the purchasers signatories hereto (the “ Purchasers ”).
RECITALS:
A.    The Borrower and certain Purchasers party hereto (the “ Existing Purchasers ”) entered into that certain Note Purchase Agreement, dated as of April 15, 2013 (the “ Prior Agreement ”), pursuant to which (i) the Existing Purchasers purchased from the Borrower Senior Subordinated Notes issued by the Borrower on April 15, 2013 in the aggregate principal amount of $5,000,000 (collectively, the “ 2013 Notes ”) and (ii) the Borrower issued to the Existing Purchasers certain warrants to purchase up to 500,000 shares of Common Stock of the Borrower at an exercise price of $4.41 per share (collectively, the “ 2013 Warrants ”).
B.    The Borrower has requested that (i) the Existing Purchasers exchange the principal amounts outstanding under the 2013 Notes for equivalent principal amounts of Senior Subordinated Notes of the Borrower issued hereunder (collectively, the “ 2015 Notes ” or the “ Notes ”) and (ii) certain Existing Purchasers loan additional amounts to the Borrower in exchange for 2015 Notes and certain additional Warrants as described herein (the “ 2015 Warrants ”). The 2013 Warrants will remain outstanding for the term of such 2013 Warrants.
C.    The Borrower has requested that certain new Purchasers (the “ New Purchasers ”) loan amounts to the Borrower in exchange for 2015 Notes and certain Warrants as described herein.
D.    The Borrower and the Existing Purchasers desire to amend and restate the Prior Agreement to accomplish the foregoing.
D.    The Borrower and each Purchaser is executing and delivering this Agreement in reliance upon the exemption from registration afforded by Section 4(2) of the Securities Act.
E.    The parties hereto wish to set forth herein their understandings and agreements pertaining to the transactions contemplated herein.
AGREEMENT:
NOW, THEREFORE , in consideration of the foregoing Recitals and the mutual covenants contained herein, and other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the Purchasers, the Borrower and their respective successors and assigns hereby agree as follows:
Article I.
THE INVESTMENT

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SECTION 1.1      Initial Closing, Subsequent Closings and Funding.
(a)      On the terms and subject to the conditions set forth herein, on the Initial Closing Date, for an aggregate purchase price of $12,000,000, the Purchasers will severally purchase from the Borrower, and the Borrower will issue and sell severally to the Purchasers, the Notes and Warrants as follows: (a) the Borrower will severally issue to the Purchasers the Notes in an aggregate principal amount for all Purchasers of $12,000,000 and for each Purchaser in accordance with its Total Commitment as set forth on Schedule 1.1 and (b) the Borrower will issue to each Purchaser Warrants to purchase that number of shares of Common Stock of the Borrower (collectively, the “ Warrants ”) in accordance with such Purchaser’s individual allocation set forth opposite such Purchaser’s name on Schedule 1.1 under the heading “Allocation of 2015 Warrants” (which shall be in addition to the 2013 Warrants previously issued to the Existing Purchasers under the Prior Agreement). All such Indebtedness shall be evidenced by, and is to be repaid according to the terms of, one or more Notes.
(b)      Within 30 days following the Initial Closing Date, the Borrower may hold one or more subsequent closings (each a “ Subsequent Closing ”) for the purchase and sale of additional Notes in an aggregate principal amount of up to $2,000,000. On each Subsequent Closing Date, each additional New Purchaser shall (i) execute a counterpart signature page to this Agreement and (ii) purchase a Note for the principal amount equal to its Total Commitment (which shall be reflected on an updated Schedule 1.1), and the Borrower shall (i) deliver to such Purchaser an executed Note and (ii) issue to such New Purchaser a Warrant in accordance with such New Purchaser’s individual allocation set forth opposite such Purchaser’s name on an updated Schedule 1.1 under the heading “Allocation of 2015 Warrants.”
(c)      Each New Purchaser shall pay for his/her/its Note by wire transfer of immediately available funds in an amount equal to its Total Commitment set forth on Schedule 1.1. Each Existing Purchasers shall pay for his/her Note by: (i) exchange of the outstanding principal amount of such Existing Purchaser’s 2013 Note for an equivalent principal amount of a 2015 Note set forth opposite such Existing Purchaser’s name on Schedule 1.1 under the heading “2013 Note Principal Rollover Amount” and/or (ii) wire transfer of immediately available funds in an amount set forth opposite such Existing Purchaser’s name on Schedule 1.1 under the heading “New Cash Commitment to Purchase 2015 Notes.”
(d)      Within 10 days after the Initial Closing Date, the Borrow shall pay each Existing Purchaser all outstanding interest owed under the 2013 Notes.
SECTION 1.2      Repayment of the Notes. The principal amount of the Notes shall be repaid in full on the Maturity Date.
SECTION 1.3      Interest on the Notes. The Notes shall bear interest at the Interest Rate, payable on the first day of each month in arrears. Interest shall be computed on the basis of a 365-day year and the actual number of days elapsed.
SECTION 1.4      Optional Prepayment . The Borrower may prepay the Notes at any time, in part or in full, without premium or penalty.

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SECTION 1.5      Payments .
(a)      The Borrower shall make each payment (including principal of or interest on the Notes or other amounts) hereunder and under any other Investment Document not later than 1:00 P.M. (New York City time) on the date when due in immediately available Dollars, without setoff, defense or counterclaim; provided, each payment (including principal of or interest on the Notes or other amounts) hereunder shall be made free and clear and without deduction for or withholding of taxes, except as required by Applicable Law. Each such payment shall be made to each Purchaser pursuant to written instructions from such Purchaser to the Borrower, including pursuant to wire transfer instructions.
(b)      Whenever any payment (including principal of or interest or other amounts) hereunder or under any other Investment Document shall become due, or otherwise would occur, on a day that is not a Business Day, such payment may be made on the next succeeding Business Day, and such extension of time shall in such case be included in the computation of interest.
(c)      All payments in respect of the principal amount of any Note shall be accompanied by payment of accrued interest on the principal amount being repaid or prepaid.
(d)      If after receipt of any payment which is applied to the payment of all or any part of the Obligations, any Purchaser or any Affiliate of such Purchaser is for any reason compelled to surrender such payment or proceeds to any Person because such payment or application of proceeds is invalidated, declared fraudulent, set aside, determined to be void or voidable as a preference, impermissible setoff, or a diversion of trust funds, or for any other reason, then the Obligations or part thereof intended to be satisfied shall be revived and continued and this Agreement shall continue in full force as if such payment or proceeds had not been received by such Purchaser or such Affiliate and the Borrower shall be liable to pay to such Purchaser and such Affiliate, and hereby does indemnify the Purchaser and any such Affiliates and hold the Purchasers and any such Affiliate harmless for the amount of such payment or proceeds surrendered.
(e)      The provisions of this Section 1.5 shall be and remain effective notwithstanding any contrary action which may have been taken by a Purchaser or any of its Affiliates in reliance upon such payment or application of proceeds, and any such contrary action so taken shall be without prejudice to the Purchasers’ rights under this Agreement and shall be deemed to have been conditioned upon such payment or application of proceeds having become final and irrevocable.
SECTION 1.6      Warrants . At the Initial Closing or any Subsequent Closing, the Borrower shall issue and sell the Warrants to the Purchasers as provided in Section 1.1 . Notwithstanding anything herein to the contrary, the 2013 Warrants held by the Existing Purchasers shall remain valid and binding obligations of the Borrower during the term of such 2013 Warrants.
SECTION 1.7      Warrant Allocation . The Purchasers and the Borrower acknowledge and agree that, for purposes of Section 1273 the Code, the Notes will be issued with original issue discount. The Purchasers and the Borrower agree to recognize and adhere to the determinations and allocations of original issue discount and valuation of the Notes and Warrants as determined by the Borrower for all federal and state income tax purposes and file all tax returns in a manner consistent

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herewith. Each Purchaser may obtain information regarding the amount of any original issue discount, the issue price, the issue date and the yield to maturity of the Notes and the allocation of the purchase price between the Warrants and the Notes by contacting the Borrower in accordance with Section 5.1.
SECTION 1.8      Use of Proceeds . The Borrower shall use the cash proceeds of the investment hereunder for general corporate purposes, which may include, without limitation, working capital, capital expenditures, repayment and refinancing of debt, research and development expenditures, clinical trial expenditures, acquisitions of additional companies or technologies and investments.
SECTION 1.9      Subordination . The Notes and the rights and obligations evidenced by the Notes issued under this Agreement are subordinate in the manner and to the extent set forth in that certain Subordination Agreement (the “ Subordination Agreement ”), dated as of April 15, 2013, by and among Silicon Valley Bank, a California corporation, and each of the parties listed on Schedule 1 to such Subordination Agreement, as amended by (i) that certain First Amendment and Joinder to and Ratification of Subordination Agreement, dated as of February 20, 2015 and (ii) that certain Second Amendment and Joinder to and Ratification of Subordination Agreement, dated as of February 25, 2015.
SECTION 1.10      2013 Note Cancellation. Upon the issuance of 2015 Notes to the Existing Purchasers in exchange for the 2013 Notes at the Initial Closing, each Existing Purchaser hereby agrees that such Existing Purchaser’s 2013 Note will be cancelled and extinguished and all obligations of the Borrower under such 2013 Note will be thereby discharged (except to extent set forth in Section 1.1(d) above).

ARTICLE II.     
CONDITIONS
SECTION 2.1      Conditions to Closing . The obligation of the Borrower and the Purchasers to enter into this Agreement and to perform their obligations hereunder is subject to the satisfaction of the following conditions on or prior to the Initial Closing Date and any Subsequent Closing Date (as the case may be):
(a)      The representations and warranties set forth in Article IV hereof and in the other Investment Documents shall be true and correct in all material respects on and as of the Initial Closing Date or any Subsequent Closing Date (as the case may be).
(b)      The Borrower shall be in compliance with all the terms and provisions set forth herein and in each other Investment Document on its part to be observed or performed, and at the time of and immediately after the Initial Closing and each Subsequent Closing (as the case may be), no Event of Default or Default shall have occurred and be continuing before or after giving effect to the Investment Documents.
(c)      The Purchasers shall have received the following items as of the Initial Closing or any Subsequent Closing (as the case may be):

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(i)      the Notes and the Warrants, duly executed by the Borrower and each of the other Investment Documents, duly executed by each of the parties thereto, in each case in a form satisfactory to the Purchasers; and
(ii)      (A) a copy of the certificate or articles of incorporation or analogous organizational documents of the Borrower, including all amendments thereto (the “ Certified Charter ”), certified as of a recent date by the Secretary of State of the jurisdiction of its organization, and a certificate as to the good standing of the Borrower as of a recent date, from such Secretary of State, and (B) a certificate of the Secretary or Assistant Secretary of the Borrower dated as of the Initial Closing Date and certifying (1) that attached thereto is a true and complete copy of the by-laws or analogous operational documents or agreements of the Borrower as in effect on the Initial Closing Date and at all times since a date prior to the date of the resolutions described in clause (2) below, (2) that attached thereto is a true and complete copy of resolutions duly adopted by the board of directors of the Borrower authorizing the execution, delivery and performance of the Investment Documents and that such resolutions have not been modified, rescinded or amended and are in full force and effect, (3) that the certificate or articles of incorporation or analogous organizational documents of the Borrower have not been amended since the date of the last amendment thereto shown on the Certified Charter, and (4) as to the incumbency and specimen signature of each officer executing any Investment Document or any other document delivered in connection herewith on behalf of the Borrower.
ARTICLE III.     
REPRESENTATIONS AND WARRANTIES
In order to induce the Purchasers to enter into the Transaction, the Borrower represents and warrants to the Purchasers on the Initial Closing Date or any Subsequent Closing Date (as the case may be) that, and, in order to induce the Borrower to enter into the Transaction, each Purchaser represents and warrants solely as set forth in Section 3.9 that:
SECTION 3.1      Organization; Powers. The Borrower: (a) is a corporation duly organized, validly existing and in good standing under the laws of the jurisdiction of its organization; (b) has the power and authority to own its Property and to carry on its business as now conducted and as proposed to be conducted, except where any failure to do so would not reasonably be expected, either individually or in the aggregate, to have a Material Adverse Effect; (c) is qualified to do business in, and is in good standing in, every jurisdiction where such qualification is required, except where the failure so to qualify would not reasonably be expected, either individually or in the aggregate, to have a Material Adverse Effect; and (d) has the power and authority to execute, deliver and perform its obligations under each of the Investment Documents and each other agreement or instrument contemplated hereby, and to borrow hereunder, as applicable.
SECTION 3.2      Authorization . The execution, delivery and performance by the Borrower of each of the Investment Documents and the obligations hereunder and thereunder (collectively, the “ Transaction ”) (a) have been duly authorized by all necessary corporate action on the part of the Borrower and (b) will not: (i) violate (A) (x) any Applicable Law, or (y) the articles of incorporation of the Borrower, or (B) any provision of any material indenture, agreement or other instrument to which the Borrower is a party or by which the Borrower or its Property is or may be

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bound, except in the case of clauses (A)(x) and (B), as would not reasonably be expected, either individually or in the aggregate, to have a Material Adverse Effect; (ii) result in a breach of or constitute (alone or with notice or lapse of time or both) a default under or give rise to any right to accelerate or to require the prepayment, repurchase or redemption of any obligation under any such indenture, agreement or other instrument, except as would not reasonably be expected, either individually or in the aggregate, to have a Material Adverse Effect or (iii) result in the creation or imposition of any Lien (other than a Permitted Lien) upon or with respect to any Property now owned or hereafter acquired by the Borrower, except as would not reasonably be expected, either individually or in the aggregate, to have a Material Adverse Effect.
SECTION 3.3      Enforceability. This Agreement has been duly executed and delivered by the Borrower and constitutes, and each other Investment Document when executed and delivered by the Borrower will constitute, a legal, valid and binding obligation of the Borrower enforceable against the Borrower in accordance with its terms, subject to applicable bankruptcy, insolvency, reorganization, moratorium, fraudulent transfer and other similar laws relating to or affecting creditors’ rights generally from time to time in effect and to general principles of equity (including concepts of materiality, reasonableness, good faith and fair dealing), regardless of whether considered in a proceeding in equity or at law and the availability of the remedy of specific performance.
SECTION 3.4      Governmental Approvals . The Borrower has all material governmental authorizations, approvals, consents, permits, licenses, certifications and qualifications, and has complied in all material respects with all applicable requirements of the United States, and other jurisdictions where the Borrower conducts business or owns Property, to conduct its business as is presently conducted and to own and operate its facilities as they are presently operated, including as may be required under Foreign Relations Laws. No action, consent or approval or registration or filing with or any other action by any Governmental Authority is required in connection with the Transaction, except for such as have been made or obtained and are in full force and effect.
SECTION 3.5      Compliance with Laws . The Borrower is not in, nor will the continued operation of the Business or its Property as currently operated result in a breach of, default under, or violation of (i) any Applicable Law, (ii) any judgment, writ, injunction, decree or order of any Governmental Authority, or (iii) any deed, lease, loan agreement, commitment, bond, note, deed of trust, restrictive covenant, license, indenture, contract, or other agreement, instrument or obligation to which it is a party or by which it is bound or to which the Business or any of its Property is subject, except in each case as would not reasonably be expected, either individually or in the aggregate, to have a Material Adverse Effect. Without limiting the foregoing, the Borrower is in compliance in all material respects with, and neither the entering into of the Investment Documents nor the use of the proceeds of the Loans will violate in any material respect: any law, rule or regulation relating to anti-terrorism or money laundering, including the Anti-Terrorism Order, the Patriot Act, the Trading with the Enemy Act, as amended, or any of the foreign assets control regulations of the United States Treasury Department (31 CFR, subtitle B, Chapter V, as amended) or any enabling legislation or executive order relating thereto, or any other Foreign Relations Laws.
SECTION 3.6      No Integrated Offering . Neither the Borrower, nor any Person acting on its behalf, has, directly or indirectly, made any offers or sales of any security or solicited any offers

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to buy any security, under circumstances that would require registration of the Securities to the Purchasers under the Securities Act or cause this offering of the Securities to be integrated with prior offerings by the Borrower for purposes of the Securities Act.
SECTION 3.7      SEC Documents; Financial Statements . Since December 31, 2013, the Borrower has filed all reports, schedules, forms, statements and other documents required to be filed by it with the SEC pursuant to the reporting requirements of the Securities Exchange Act of 1934 (the “ 1934 Act ”) (all of the foregoing and all exhibits included therein and financial statements, notes and schedules thereto and documents incorporated by reference therein being hereinafter referred to as the “ SEC Documents ”). As of their respective dates, the SEC Documents complied in all material respects with the requirements of the 1934 Act and the rules and regulations of the SEC promulgated thereunder and applicable thereto, and none of the SEC Documents, at the time they were filed with the SEC, contained any untrue statement of a material fact or omitted to state a material fact required to be stated therein or necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading. As of their respective dates, the financial statements of the Borrower included in the SEC Documents complied as to form in all material respects with applicable accounting requirements and the published rules and regulations of the SEC with respect thereto. Such financial statements have been prepared in accordance with GAAP, consistently applied, during the periods involved (except (i) as may be otherwise indicated in such financial statements or the notes thereto, or (ii) in the case of unaudited interim statements, to the extent they may exclude footnotes or may be condensed or summary statements) and fairly present in all material respects the financial position of the Borrower as of the dates thereof and the results of its operations and cash flows for the periods then ended (subject, in the case of unaudited statements, to normal year-end audit adjustments).
SECTION 3.8      Absence of Certain Changes . Except as disclosed in the SEC Documents since December 31, 2013, there has been no material adverse change and no material adverse development in the business, properties, assets, operations, results of operations, or financial condition of the Borrower.
SECTION 3.9      Representations and Warranties of the Purchasers .
Each Purchaser represents and warrants with respect to only itself that:
(a)      No Public Sale or Distribution . Such Purchaser is acquiring the Securities for its own account and not with a view towards, or for resale in connection with, the public sale or distribution thereof, except pursuant to sales registered or exempted under the Securities Act; provided , however , that by making the representations herein, such Purchaser does not agree to hold any of the Securities for any minimum or other specific term and reserves the right to dispose of the Securities at any time in accordance with or pursuant to a registration statement or an exemption under the Securities Act. Such Purchaser is acquiring the Securities hereunder in the ordinary course of its business. Such Purchaser does not presently have any agreement or understanding, directly or indirectly, with any Person to distribute any of the Securities .
(b)      Accredited Investor Status . Such Purchaser is an “accredited investor” as that term is defined in Rule 501(a) of Regulation D. No Purchaser has committed a “bad actor” disqualifying event within the meaning of Rule 506(d)(l)(i)-(viii) of Regulation D.

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(c)      Reliance on Exemptions . Such Purchaser understands that the Securities are being offered and sold to it in reliance on specific exemptions from the registration requirements of United States federal and state securities laws and that the Borrower is relying in part upon the truth and accuracy of, and such Purchaser’s compliance with, the representations, warranties, agreements, acknowledgments and understandings of such Purchaser set forth herein in order to determine the availability of such exemptions and the eligibility of such Purchaser to acquire the Securities.
(d)      Information . Such Purchaser and its advisors, if any, have been furnished with all materials relating to the business, finances and operations of the Borrower and materials relating to the offer and sale of the Securities which have been requested by such Purchaser. Such Purchaser and its advisors, if any, have been afforded the opportunity to ask questions of the Borrower. Neither such inquiries nor any other investigation conducted by or on behalf of such Purchaser or its representatives or counsel shall modify, amend or affect such Purchaser’s right to rely on the truth, accuracy and completeness of the SEC Documents and the Company’s representations and warranties contained in the Agreement. Such Purchaser understands that its investment in the Securities involves a high degree of risk.
(e)      Experience of Such Purchaser . Such Purchaser understands that its investment in the Securities involves a high degree of risk. Such Purchaser, either alone or together with its representatives, has such knowledge, sophistication and experience in business and financial matters so as to be capable of evaluating the merits and risks of the prospective investment in the Securities, and has so evaluated the merits and risks of such investment. Such Purchaser is able to bear the economic risk of an investment in the Securities and is able to afford a complete loss of such investment.
(f)      No Governmental Review . Such Purchaser understands that no United States federal or state agency or any other government or governmental agency has passed on or made any recommendation or endorsement of the Securities or the fairness or suitability of the investment in the Securities nor have such authorities passed upon or endorsed the merits of the offering of the Securities.
(g)      Transfer or Resale . Such Purchaser will not sell, offer to sell, assign, pledge, hypothecate or otherwise transfer any of the Securities unless (i) pursuant to an effective registration statement under the Securities Act, (ii) such Purchaser provides the Borrower with reasonable assurances and customary representations, that such Securities can be sold pursuant to Rule 144 under the Securities Act. Notwithstanding anything to the contrary contained in the Agreement, such Purchaser may transfer (without restriction) the Securities to its Affiliates provided that such Affiliate is an “accredited investor” under Regulation D and such affiliate agrees to be bound by the terms and conditions of the Agreement.
(h)      Legends . Such Purchaser understands that the certificates or other instruments representing the Notes and, until such time as the resale of the Warrant Interests have been registered under the Securities Act, the stock certificates representing the Warrant Interests, except as set forth below, shall bear any legend as required by the “blue sky” laws of any state and a restrictive legend in substantially the following form (and a stop-transfer order may be placed against transfer of such certificates and instruments)

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THIS NOTE HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR APPLICABLE STATE SECURITIES LAWS. THIS NOTE MAY NOT BE OFFERED FOR SALE, SOLD, TRANSFERRED OR ASSIGNED IN THE ABSENCE OF (A) AN EFFECTIVE REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933, AS AMENDED, AND APPLICABLE STATE SECURITIES LAWS, OR (B) THE TRANSFEROR PROVIDES THE BORROWER WITH REASONABLE ASSURANCES AND CUSTOMARY REPRESENTATIONS THAT REGISTRATION IS NOT REQUIRED UNDER SAID ACT AND APPLICABLE STATE SECURITIES LAWS.
The legend set forth above shall be removed and the Borrower shall issue a certificate or instrument without such legend to the holder of the Securities upon which it is stamped, if, unless otherwise required by state securities laws, (i) such Securities are registered for resale under the Securities Act; provided , that each Purchaser has complied with or covenants and agrees that it will comply with the prospectus delivery requirements of the Securities Act as applicable to it in connection with sales of such Securities pursuant to a registration statement or (ii) in connection with a sale, assignment or other transfer, such holder provides the Borrower with reasonable assurances and customary representations to the effect that such legend is not required under applicable requirements of the Securities Act.
ARTICLE IV.     
EVENTS OF DEFAULT AND REMEDIES
SECTION 4.1      Events of Default . If any of the following events (“ Events of Default ”) occurs:
(a)      the Borrower shall fail to pay (i) any amount of principal of any Notes when due or (ii) any amount of interest thereon or other amount payable hereunder or under any Note or any other Loan Document, for a period of five (5) Business Days from the day such payment is due, excluding any payments due on the Maturity Date; or
(b)      default is made in the due observance or performance by the Borrower of any covenant, condition or agreement contained in any Investment Document and such default continues unremedied for a period of forty-five (45) days after the date upon which notice thereof is given to the Borrower by the Required Purchasers;
(c)      any representation or warranty made or deemed made by the Borrower under any Investment Document hereunder or any representation, warranty or certification contained in any report, certificate, financial statement or other instrument furnished by the Borrower in connection with or pursuant to any Investment Document, proves to have been incorrect in any material respect when so made, deemed made or furnished (except to the extent already qualified by materiality, in which case, it shall prove to have been incorrect in any respect);
(d)      any event of default is declared or otherwise occurs (after giving effect to any applicable notice and/or grace periods) that has the effect of accelerating the maturity thereof

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under any Indebtedness of the Borrower having an aggregate principal amount of $13,500,000 or greater;
(e)      the occurrence of any of the following: (i) the Borrower shall have made an assignment for the benefit of its creditors; (ii) the Borrower shall have become unable, admit in writing its inability or generally fail, to pay its debts as they become due; (iii) the Borrower shall have filed a voluntary petition in bankruptcy; (iv) the Borrower shall have been adjudicated bankrupt or insolvent; (v) the Borrower shall have filed any petition or answer seeking for itself any reorganization, arrangement, composition, readjustment, liquidation, dissolution or similar relief under any present or future Applicable Law pertinent to such circumstances; (vi) the Borrower shall have filed or shall file any answer admitting or not contesting the material allegations of a bankruptcy, insolvency or similar petition filed against the Borrower; (vii) the Borrower shall have sought or consented to, or acquiesced in, the appointment of any trustee, receiver, or liquidator of the Borrower or of all or any substantial part of the Properties of the Borrower; (viii) 90 days shall have elapsed after the commencement of an action against the Borrower seeking reorganization, arrangement, composition, readjustment, liquidation, dissolution or similar relief under any present or future Applicable Law without such action having been dismissed or without all orders or proceedings thereunder affecting the operations or the business of the Borrower having been stayed, or if a stay of any such order or proceedings shall thereafter be set aside and the action setting it aside shall not be timely appealed; or (ix) ninety (90) days shall have expired after the appointment, without the consent or acquiescence of the Borrower of any trustee, receiver or liquidator of the Borrower or of all or any substantial part of the Properties of the Borrower without such appointment having been vacated;
(f)      the occurrence of any action initiating, or any event that results in, the dissolution, liquidation, winding-up or termination of the Borrower;
(g)      judgments or orders for the payment of money shall be entered against the Borrower by any court, or a warrant of attachment or execution or similar process shall be issued or levied against property of the Borrower, that in the aggregate equal or exceed $13,500,000 in value (to the extent not covered by independent third-party insurance) and such judgments, orders, warrants or process shall continue undischarged or unstayed for 45 days;
(h)      any Investment Document shall be canceled, terminated, revoked or rescinded (or any notice of such cancellation, termination, revocation or rescission given) other than in accordance with its terms; or any action at law, suit in equity or other legal proceeding to cancel, revoke, or rescind any Investment Document shall be commenced by or on behalf of the Borrower, or by any court or any other governmental or regulatory authority or agency of competent jurisdiction; or any court or any other governmental or regulatory authority or agency of competent jurisdiction shall make a final, non appealable determination that, or shall issue a final non appealable judgment, order, decree or ruling to the effect that, any one or more of the Investment Documents is illegal, invalid or unenforceable in accordance with the terms thereof;
then: (i) in every such event other than an Event of Default described in Section 4.1(e) above, and at any time thereafter during the continuance of such event, the Required Purchasers may, by notice to the Borrower declare the principal amount then outstanding under the Notes to be forthwith due and payable in whole or in part, whereupon the principal amount so declared to be due and payable

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and accrued interest thereon and all other liabilities of the Borrower accrued hereunder and under any other Investment Document in respect of such Notes, shall become forthwith due and payable, without presentment demand, protest or any other notice of any kind, all of which are hereby expressly waived by the Borrower, anything contained herein or in any other Investment Document to the contrary notwithstanding; and (ii) in any event with respect to an Event of Default described in Section 4.1(e) above, the principal of the Notes then outstanding and accrued interest thereon and all other liabilities of the Borrower accrued hereunder and under any other Investment Document, shall automatically become due and payable, without presentment demand, protest or any other notice of any kind, all of which are hereby expressly waived by the Borrower, anything contained herein or in any other Investment Document to the contrary notwithstanding.
SECTION 4.2      Waivers . The Borrower waives presentment, demand, notice of dishonor, and protest, and all demands and notices of any action taken by the Purchasers under this Agreement, except as otherwise provided herein.
SECTION 4.3      Enforcement Actions. The Required Purchasers may, at their option, collect all or any portion of the Obligations or enforce against the Borrower any of the Purchasers’ rights and remedies with respect to the Obligations including: (a) commencing or pursuing legal proceedings to collect any amounts owed with respect to or to otherwise enforce the Obligations; or (b) executing upon, or otherwise enforcing, any judgment obtained with respect to the payment or performance of the Obligations.
SECTION 4.4      Costs . The Borrower shall pay all reasonable expenses of any nature, whether incurred in or out of court, and whether incurred before or after the Notes shall become due at their maturity date or otherwise (including reasonable attorneys’ fees and costs) which the Purchasers may reasonably incur in connection with the collection or enforcement of any of the Obligations.
SECTION 4.5      Remedies Non-Exclusive . None of the rights, remedies, privileges or powers of the Purchasers expressly provided for herein are exclusive, but each of them is cumulative with, and in addition to, every other right, remedy, privilege and power now or hereafter existing in favor of each of the Purchasers, whether pursuant to the other Investment Documents, at law or in equity, by statute or otherwise.
ARTICLE V.     
MISCELLANEOUS
SECTION 5.1      Notices. Notices and other communications provided for herein shall be in writing and shall be delivered by hand or overnight courier service, mailed by certified or registered mail or sent by facsimile, as follows:
(f)      if to the Borrower:
3 Forbes Road
    Lexington, MA 02421
    Attention: Vice President of Finance
    Facsimile: (781) 674-4200

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With a copy to:
3 Forbes Road
    Lexington, MA 02421
    Attention: Legal Department
    Facsimile: (781) 674-4200
With a copy to:
Choate, Hall & Stewart LLP
    Two International Place
    Boston, MA 02110
    Attention: Gerald E. Quirk
    Facsimile: (617) 502-4817
(g)      if to any Purchaser, at the contact information provided in Schedule 5.1 .
All notices and other communications given to any party hereto in accordance with the provisions of this Agreement shall be deemed to have been given (i) two Business Days after being sent by registered or certified mail, return receipt requested, postage prepaid or (ii) one Business Day after being sent via a reputable nationwide overnight courier service guaranteeing next Business day delivery or (iii) on the date on which it is sent by (x) facsimile with acknowledgment of receipt at the number to which it is required to be sent or (y) electronic transmission upon electronic communication from the recipient acknowledging receipt (whether automatic or manual from the recipient), in each case to the intended recipient as set forth above.
SECTION 5.2      Successors and Assigns .
(a)      Whenever in this Agreement any of the parties hereto is referred to, such reference shall be deemed to include the permitted successors and assigns of such party; and all covenants, promises and agreements by or on behalf of the Borrower or the Purchasers that are contained in this Agreement shall bind and inure to the benefit of their respective successors and assigns.
(b)      The Borrower shall not assign or delegate any of its rights or duties hereunder without the prior written consent of the Purchasers, and any attempted assignment or delegation without such consent shall be null and void. Subject to Section 3.9(g) , each Purchaser may assign or delegate any of its rights or duties hereunder or under the Notes; provided the prior written consent of the Borrower shall be required (and any attempted assignment or delegation without such consent shall be null and void) except in the case of an assignment to a Purchaser or an Affiliate of a Purchaser that is an “accredited investor” as such term is defined in Rule 501(a) of Regulation D.
SECTION 5.3      Waiver of Consequential and Punitive Damages . The parties hereto waive to the fullest extent permitted by Applicable Law all claims to consequential and punitive damages in any lawsuit or other legal action brought by any of them against any other of them in respect of (i) any claim among or between any of them arising under this Agreement, the other Investment Documents, or any other agreement or agreements between or among any of them at any time,

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including any such agreements, whether written or oral, made or alleged to have been made at any time prior to the Initial Closing Date and each Subsequent Closing Date, and all agreements made hereafter or otherwise, and (ii) any and all claims arising under common law or under any statute of any state or the United States of America, including any thereof in contract, tort, strict liability or otherwise, whether any such claims be now existing or hereafter arising, now known or unknown. The Purchasers and the Borrower acknowledge and agree that this waiver of claims for consequential damages and punitive damages is a material element of the consideration for this Agreement.
SECTION 5.4      Applicable Law. THIS AGREEMENT AND THE OTHER INVESTMENT DOCUMENTS AND THE RIGHTS AND OBLIGATIONS OF THE PARTIES HEREUNDER AND THEREUNDER (OTHER THAN AS EXPRESSLY SET FORTH IN THE OTHER INVESTMENT DOCUMENTS) SHALL BE CONSTRUED IN ACCORDANCE WITH AND GOVERNED BY THE LAWS OF THE STATE OF NEW YORK.
SECTION 5.5      Waivers .
No failure or delay of a Purchaser in exercising any power or right hereunder or under any other Investment Document shall operate as a waiver thereof nor shall any single or partial exercise of any such right or power, or any abandonment or discontinuance of steps to enforce such a right or power, preclude any other or further exercise thereof or the exercise of any other right or power. The rights and remedies of the Purchasers hereunder and under the other Investment Documents are cumulative and are not exclusive of any rights or remedies that they would otherwise have. No notice or demand on the Borrower in any case shall entitle the Borrower to any other or further notice or demand in similar or other circumstances.
SECTION 5.6      Interest Rate Limitation. If at any time the Interest Rate, together with all fees, charges, and other amounts which are treated under Applicable Law as interest thereunder (collectively the “ Charges ”) , shall exceed the maximum lawful rate (the “ Maximum Rate ”) which may be contracted for, charged, taken, received or reserved by the Purchasers in accordance with Applicable Law, the rate of interest payable in respect thereof, together with all Charges payable in respect thereof shall be limited to the Maximum Rate. If, from any circumstance whatsoever, the Purchasers shall ever receive anything of value deemed Charges by Applicable Law in excess of the Maximum Rate, an amount equal to any excessive Charges shall be applied to the reduction of the principal balance owing under the Notes (whether or not then due) or at the option of the Required Purchasers be paid over to the Borrower, and not to the payment of Charges. All Charges (including any amounts or payments deemed to be Charges) paid or agreed to be paid to the Purchasers shall, to the extent permitted by Applicable Law, be amortized, prorated, allocated, and spread throughout the full period until payment in full of the principal balance of the Notes so that the Charges thereof for such full period will not exceed the Maximum Rate.
SECTION 5.7      Entire Agreement. This Agreement and the other Investment Documents constitute the entire contract between the parties relative to the subject matter hereof. Any other previous agreement among the parties with respect to the subject matter hereof is superseded by this Agreement and the other Investment Documents, including without limitation the Prior Agreement. Upon execution of this Agreement by the parties hereto, all surviving provisions of the Prior Agreement are and shall be null and void and of no further effect. Nothing in this Agreement or in the other Investment Documents, expressed or implied, is intended to confer upon any party

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other than the parties hereto and thereto any rights, remedies, obligations or liabilities under or by reason of this Agreement or the other Investment Documents.
SECTION 5.8      WAIVER OF JURY TRIAL .
EACH PARTY HERETO HEREBY WAIVES, TO THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW, ANY RIGHT IT MAY HAVE TO A TRIAL BY JURY IN RESPECT OF ANY LITIGATION DIRECTLY OR INDIRECTLY ARISING OUT OF, UNDER OR IN CONNECTION WITH THIS AGREEMENT OR ANY OF THE OTHER INVESTMENT DOCUMENTS. EACH PARTY HERETO (A) CERTIFIES THAT NO REPRESENTATIVE, AGENT OR ATTORNEY OF ANY OTHER PARTY HERETO HAS REPRESENTED, EXPRESSLY OR OTHERWISE, THAT SUCH OTHER PARTY WOULD NOT, IN THE EVENT OF LITIGATION, SEEK TO ENFORCE THE FOREGOING WAIVER AND (B) ACKNOWLEDGES THAT IT AND THE OTHER PARTIES HERETO HAVE BEEN INDUCED TO ENTER INTO THIS AGREEMENT AND THE OTHER INVESTMENT DOCUMENTS, AS APPLICABLE, BY, AMONG OTHER THINGS, THE MUTUAL WAIVERS AND CERTIFICATIONS IN THIS SECTION 5.8 .
SECTION 5.9      Severability. In the event any one or more of the provisions contained in this Agreement or in any other Investment Document should be held invalid, illegal or unenforceable in any way, the validity, legality and enforceability of the remaining provisions contained herein and therein shall not in any way be affected or impaired thereby (it being understood that the invalidity of a particular provision in a particular jurisdiction shall not in and of itself affect the validity of such provision in any other jurisdiction). The parties shall endeavor in good faith negotiations to replace the invalid, illegal or unenforceable provisions with valid provisions the economic effect of which comes as close as possible to that of the invalid, illegal or unenforceable provisions.
SECTION 5.10      Counterparts. This Agreement may be executed in counterparts (and by different parties hereto on different counterparts), each of which shall constitute an original but all of which when taken together shall constitute a single contract. Delivery of an executed signature page to this Agreement by facsimile, email in pdf format or similar electronic transmission shall be as effective as delivery of a manually signed counterpart of this Agreement.
SECTION 5.11      Headings. Article and Section headings used herein are for convenience of reference only, are not part of this Agreement and are not to affect the construction of or to be taken into consideration in interpreting, this Agreement.
SECTION 5.12      Jurisdiction; Consent to Service of Process .
ANY LEGAL ACTION OR PROCEEDING ARISING UNDER ANY INVESTMENT DOCUMENT OR IN ANY WAY CONNECTED WITH OR RELATED OR INCIDENTAL TO THE DEALINGS OF THE PARTIES HERETO OR ANY OF THEM WITH RESPECT TO ANY INVESTMENT DOCUMENT, OR THE TRANSACTIONS RELATED THERETO, IN EACH CASE WHETHER NOW EXISTING OR HEREAFTER ARISING, SHALL BE BROUGHT IN THE COURTS OF THE STATE OF NEW YORK SITTING IN NEW YORK COUNTY (BOROUGH OF MANHATTAN) OR OF THE UNITED STATES FOR THE SOUTHERN

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DISTRICT OF SUCH STATE, AND BY EXECUTION AND DELIVERY OF THIS AGREEMENT, THE BORROWER AND EACH PURCHASER CONSENTS, FOR ITSELF AND IN RESPECT OF ITS PROPERTY, TO THE EXCLUSIVE JURISDICTION OF THOSE COURTS AND AGREES THAT IT WILL NOT COMMENCE OR SUPPORT ANY SUCH ACTION OR PROCEEDING IN ANOTHER JURISDICTION. THE BORROWER AND EACH PURCHASER IRREVOCABLY WAIVES ANY OBJECTION, INCLUDING ANY OBJECTION TO THE LAYING OF VENUE OR BASED ON THE GROUNDS OF FORUM NON CONVENIENS , WHICH IT MAY NOW OR HEREAFTER HAVE TO THE BRINGING OF ANY ACTION OR PROCEEDING IN SUCH JURISDICTION IN RESPECT OF ANY INVESTMENT DOCUMENT OR OTHER DOCUMENT RELATED THERETO. EACH PARTY HERETO IRREVOCABLY CONSENTS TO SERVICE OF PROCESS IN ANY ACTION OR PROCEEDING ARISING OUT OF OR RELATING TO ANY INVESTMENT DOCUMENT IN THE MANNER PROVIDED FOR NOTICES (OTHER THAN TELECOPIER) IN SECTION 5.1 . NOTHING IN THIS AGREEMENT OR ANY OTHER INVESTMENT DOCUMENT WILL AFFECT THE RIGHT OF ANY PARTY HERETO TO SERVE PROCESS IN ANY OTHER MANNER PERMITTED BY APPLICABLE LAW.
SECTION 5.13      Consents and Approvals .
(a)      Subject to the terms of Section 5.13(b) , to the extent that (i) the terms of this Agreement or any of the other Investment Documents require the Borrower to obtain the consent or approval of the Purchasers, (ii) the Borrower seeks an amendment to or termination of any of the terms of this Agreement or any of the Investment Documents, or (iii) the Borrower seeks a waiver of any right granted to the Purchasers under this Agreement or any of the Investment Documents, such consent, approval, action, termination, amendment or waiver (each, an “ Approval ”) shall be made by the Purchasers of Notes representing at least a majority of the aggregate principal amount outstanding under all of the Notes (the “ Required Purchasers ”).
(b)      Notwithstanding anything to the contrary contained in Section 5.13(a) , each Purchaser may, in its sole discretion, agree to any consent, approval, action, termination, amendment or waiver that solely effects the rights of such Purchaser hereunder and under the other Investment Documents.
(c)      Each Purchaser agrees that, for the benefit of the other Purchasers, any proceeds received upon enforcement by such Purchaser of its rights and remedies under this Agreement, will be divided pro rata among all Purchasers.
SECTION 5.14      Relationship of the Parties; Advice of Counsel. This Agreement provides for the making of an investment by the Purchasers, in their capacity as lenders, in the Borrower, in its capacity as a borrower, and for the payment of interest and repayment of principal by the Borrower to the Purchasers. Nothing contained in this Agreement shall be construed as permitting or obligating the Purchasers to control the Borrower or to conduct the Borrower’s operations, as creating any fiduciary obligation on the part of the Purchasers to the Borrower, or as creating any joint venture, agency or other relationship between the parties other than as explicitly and specifically stated in this Agreement or as may otherwise exist apart from this Agreement and the other Investment Documents. The Purchasers are not (and shall not be construed as) a partner, joint venturer, alter-ego, manager, controlling person, operator or other business participant of any kind of the Borrower;

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the Purchasers nor the Borrower intend that the Purchasers assume such status, and, accordingly, the Purchasers shall not be deemed as a result of this Agreement and the other Investment Documents responsible for (or a participant in) any acts or omissions of the Borrower. Each of the Purchasers and the Borrower represent and warrant to the other that it has had the advice of experienced counsel of its own choosing in connection with the negotiation and execution of this Agreement and with respect to all matters contained herein.
SECTION 5.15      Confidentiality. Each of the Purchasers agrees to maintain the confidentiality of the Information (as defined below), except that Information may be disclosed: (a) to its and its Affiliates’ directors, officers, employees, investors and agents, including accountants, legal counsel and other advisors (it being understood that the Persons to whom such disclosure is made will be informed of the confidential nature of such Information and instructed to keep such Information confidential); (b) to the extent requested by any regulatory authority; (c) to the extent required by Applicable Laws or regulations or by any subpoena or similar legal process; (d) to any other party to this Agreement; (e) in connection with the exercise of any remedies hereunder or any suit, action or proceeding relating to this Agreement or the enforcement of rights hereunder; (f) subject to an agreement containing provisions substantially the same as those of this Section, to any permitted transferee of any of its rights or obligations under this Agreement; (g) with the consent of the Borrower; or (h) to the extent such Information (i) becomes publicly available other than as a result of a breach of this Section or (ii) becomes available to any Purchaser on a non-confidential basis from a source other than the Borrower; provided that such source is not bound by a confidentiality agreement. For the purposes of this Section, “ Information ” means all information received from the Borrower or any of its Subsidiaries relating to the Borrower or any of its Subsidiaries or their business, other than any such information that is available to any Purchaser on a non-confidential basis prior to disclosure by the Borrower or any of its Subsidiaries. Any Person required to maintain the confidentiality of Information as provided in this Section shall be considered to have complied with its obligation to do so if such Person has exercised the same degree of care to maintain the confidentiality of such Information as such Person would accord to its own confidential information.
SECTION 5.16      Transfer of Notes .
(a)      Upon surrender of any Note for transfer or for exchange to the Borrower at its principal office, the Borrower at its expense will execute and deliver in exchange therefor a new Note or Notes, as the case may be, of the same type in denominations of at least $500,000, as requested by the holder or transferee, which aggregate the unpaid principal amount of such Note, dated so that there will be no loss of interest on such surrendered Note and otherwise of like tenor. The Borrower shall keep a register for the recordation of the principal amount (and related interest amounts) of each Note
(b)      Upon receipt of evidence reasonably satisfactory to the Borrower of the loss, theft, destruction or mutilation of any Note and, in the case of any such loss, theft or destruction of any Note, upon delivery of an indemnity bond in such reasonable amount as the Borrower may determine (or an unsecured indemnity agreement from the Purchaser reasonably satisfactory to the Borrower), or, in the case of any such mutilation, upon the surrender of such Note for cancellation to the Borrower at its principal office, the Borrower at its expense will execute and deliver, in lieu

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thereof, a new Note of the same class and of like tenor, dated so that there will be no loss of interest on (and registered in the name of the holder of) such lost, stolen, destroyed or mutilated Note. Any Note in lieu of which any such new Note has been so executed and delivered by the Borrower shall be deemed to be not outstanding for any purpose of this Agreement.
SECTION 5.17      Registration . The Borrower shall exercise commercially reasonable efforts to file within one hundred twenty (120) days of the Initial Closing Date a registration statement with the Securities and Exchange Commission registering for resale by the Warrant Holders of the Common Stock issued in connection with any exercises of the Warrants and, thereafter, shall use commercially reasonable efforts to cause such registration statement to be declared effective under the Securities Act. Notwithstanding the foregoing, if the board of directors of the Borrower determines in good faith that the use or continued use of such registration statement, at any time, would (i) require the Borrower to make a public disclosure of information that, in the good faith judgment of the Borrower, would be required to be made in such registration statement so that such registration statement would not be materially misleading and (ii) the Borrower has a bona fide business purpose for not disclosing publicly at such time, the Borrower shall have the right to, upon written notice to the Warrant Holders to defer the filing or suspend use of the registration statement until such time as the Borrower determines that such information is no longer material or may be disclosed publicly.
ARTICLE VI.     
DEFINITIONS
SECTION 6.1      Defined Terms. As used in this Agreement, the following terms have the meanings specified below:
1934 Act ” has the meaning specified in Section 3.7 .
2013 Notes ” has the meaning specified in the recitals .
2013 Warrants ” has the meaning specified in the recitals .
Affiliate ” with reference to any Person any other Person Controlling, Controlled by or under direct or indirect common Control with that Person.
Agreement ” has the meaning specified in the introduction to this Agreement.
Anti-Terrorism Order ” means Executive Order No. 13,244 66 Fed Reg. 49,079 (2001) issued by the President of the United States of America (Executive Order Blocking Property and Prohibiting Transactions with Persons Who Commit, Threaten to Commit or Support Terrorism).
Applicable Law ” means any applicable Federal, state, foreign or local law, ordinance, order, decree, regulation, rule or requirement of any Governmental Authority, including Foreign Relations Laws.
Approval ” has the meaning specified in Section 5.13(a) .
Borrower ” has the meaning specified in the introduction to this Agreement.

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Business ” means the business engaged in by the Borrower and its Subsidiaries as of the Initial Closing Date and such other businesses that are ancillary or related thereto.
Business Day means any day other than a Saturday, Sunday or day on which banks in Boston, Massachusetts are required by Applicable Law to close.
Capitalized Leases means any lease which is required to be capitalized on the balance sheet of the lessee in accordance with GAAP.
Certified Charter ” has the meaning specified in Section 2.1(c)(ii) .
Charges ” has the meaning specified in Section 5.6 .
Code means the Internal Revenue Code of 1986 and the rules and regulations thereunder, as the same may from time to time be supplemented or amended and in effect.
Common Stock ” means the common stock of the Borrower.
Consolidated has the meaning ascribed to such term under GAAP.
Control means the possession, directly or indirectly, of the power to direct or cause the direction of the management or policies of a Person, whether through the ownership of voting securities, by contract or otherwise, and the terms “ Controlling ” and “ Controlled ” have meanings correlative thereto.
Default ” means any event or condition that upon notice, lapse of time or both would constitute an Event of Default.
Dollars or “$” means Dollars in lawful currency of the United States of America.
Events of Default ” has the meaning specified in Article V .
Existing Purchasers ” has the meaning specified in the recitals .
Foreign Relations Laws ” means, collectively, the Foreign Corrupt Practices Act of 1977, as amended (15 U.S.C. §§ 78dd-1, et seq.), the Foreign Agents Registration Act of 1938, as amended (22 U.S.C. §611, et seq.), the UK Bribery Act 2010, as amended, OFAC, the Patriot Act, the Anti-Terrorism Act, the Trading with the Enemy Act, as amended, and any and all other anti-bribery laws, rules, regulations, promulgations and directives, anti-corruption or anti-terrorism laws, rules, regulations, promulgations and directives, embargos, trading and economic sanctions and restrictions, and including other laws, rules, regulations, promulgations and directives regulating payments by Persons to foreign government officials to assist in obtaining or retaining business, anti-bribery laws, rules, regulations, promulgations and directives, any of the foreign assets control regulations of the United States Treasury Department (31 CFR, subtitle B, Chapter V, as amended) and laws, rules, regulations, promulgations and directives prohibiting the willful use of the mails or any means of instrumentality of interstate commerce corruptly in furtherance of any offer, payment, promise to pay, or authorization of the payment of money or anything of value to any Person, foreign or domestic.

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GAAP ” means the generally accepted accounting principles in the United States of America, consistently applied.
Governmental Authority(ies) means the government of the United States or any other nation, or of any political subdivision thereof, whether state or local, and any agency, authority, instrumentality, regulatory body, court, central bank or other entity exercising executive, legislative, judicial, taxing, regulatory or administrative powers or functions of or pertaining to government (including any supra-national bodies such as the European Union or the European Central Bank).
Guarantees ” of or by any Person means any obligation, contingent or otherwise, of such Person guaranteeing or having the economic effect of guaranteeing any Indebtedness of any other Person (the “ primary obligor ”) in any manner, whether directly or indirectly, and including any obligation of such Person: (a) to purchase or pay (or advance or supply funds for the purchase or payment of) such Indebtedness or to purchase (or advance or supply funds for the purchase of) any security for the payment of such Indebtedness; (b) to purchase or lease Property, securities or services for the purpose of assuring the owner of such Indebtedness of the payment of such Indebtedness; or (c) to maintain a fixed or formula amount of working capital, equity capital or any other financial statement condition or liquidity of the primary obligor so as to enable the primary obligor to pay such Indebtedness; provided that the term “Guarantee” shall not include endorsements for collection or deposit in the ordinary course of business. The word “Guarantee” when used as a verb shall have the correlative meaning.
Indebtedness means, as applied to any Person, (i) all obligations for borrowed money or other extensions of credit whether secured or unsecured, absolute or contingent, including, without limitation, unmatured reimbursement obligations with respect to letters of credit or guarantees issued for the account of or on behalf of such Person, and all obligations representing the deferred purchase price of property, other than accounts payable arising in the ordinary course of business, (ii) all obligations evidenced by bonds, notes, debentures or other similar instruments, (iii) all obligations secured by any mortgage, pledge, security interest or other lien on property owned or acquired by such Person, whether or not the obligations secured thereby shall have been assumed (provided that operating equipment leases shall not constitute Indebtedness), (iv) that portion of all obligations arising under Capitalized Leases that is required to be capitalized on the Consolidated balance sheet of such Person, (v) all Guarantees, (vi) all obligations outstanding under any synthetic leases, off-balance sheet loan or similar off-balance sheet financing of such Person, (vii) all obligations of such Person in respect of interest rate protection agreements, foreign currency exchange agreements or other interest or exchange rate hedging arrangements and (viii) all obligations that are immediately due and payable out of the proceeds of or production from property now or hereafter owned or acquired by such Person. For all purposes, the Indebtedness of any Person shall include the Indebtedness of any partnership or joint venture (other than a joint venture that is itself a corporation or limited liability company) in which such person is a general partner or a joint venturer, except to the extent such Person’s liability for such Indebtedness is otherwise limited and only to the extent such Indebtedness would be included in Indebtedness of the type described in clauses (i), (ii), (iv), (vi) and (vii) of this definition.
Information ” has the meaning specified in Section 5.15 .

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Initial Closing ” means the consummation of the transactions to occur on the Initial Closing Date hereunder.
Initial Closing Date means the date of this Agreement.
Insolvency Proceeding ” means any proceeding in respect of bankruptcy, insolvency, winding up, receivership, dissolution or assignment for the benefit of creditors, in each of the foregoing events whether under Title 11 of the United States Code (11 U.S.C. § 101 et seq.) or any similar federal, state or foreign bankruptcy, insolvency, reorganization, receivership or similar law.
Interest Rate ” means 8.0% per annum.
Investment Documents ” means, collectively, the Loan Documents, the Warrants, the Warrant Interests and all other instruments and documents executed and delivered in connection with the Transaction.
Lien means any mortgage, pledge, hypothecation, assignment, deposit arrangement, encumbrance, lien (statutory or other), charge, or preference, priority or other security interest or preferential arrangement in the nature of a security interest of any kind or nature whatsoever (including any conditional sale or other title retention agreement, any easement, right of way or, other encumbrance on title to real property, and any financing lease having substantially the same economic effect as any of the foregoing).
Loan Documents ” means, collectively, this Agreement, the Notes and all other instruments and documents executed and delivered in connection therewith.
Material Adverse Effect means (a) a material adverse change in, or a material adverse effect upon, the operations, business, properties, liabilities (actual or contingent) or condition (financial or otherwise) of the Borrower and its Subsidiaries taken as a whole; (b) a material impairment of the ability of the Borrower to perform its material obligations under any Investment Document to which it is a party; or (c) a material adverse effect upon the legality, validity, binding effect or enforceability against the Borrower of any Investment Document.
Maturity Date means February 20, 2018.
Maximum Rate has the meaning specified in Section 5.6 .
Notes ” or “ 2015 Notes ” means the Senior Subordinated Notes dated as of the date hereof or any Subsequent Closing Date (which notes shall be in the form attached hereto as Exhibit I ) issued by the Borrower made payable severally to the Purchasers and evidencing the Borrower’s repayment obligation for the loan to the Borrower described in Section 1.1 , together with all other Notes accepted from time to time in substitution, renewal or replacement for all or any part thereof including pursuant to Section 5.16 .
Obligations ” means all principal, interest (including all interest, fees and other amounts that accrue after the commencement of any case or proceeding in bankruptcy after the insolvency of, or for the reorganization of the Borrower, whether or not allowed in such proceeding), any fees, charges, expenses, attorneys’ fees, and any other sum chargeable to the Borrower under this

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Agreement, the Notes, or any other Investment Document, together with all Indebtedness of any and every other kind and nature whether heretofore, now or hereafter owing, arising, due and payable and howsoever evidenced, created or incurred and whether arising or existing under written agreement or operation of law, of any kind or nature, present or future, in each case arising under this Agreement or any of the other Investment Documents.
OFAC ” means Section 1 of Executive Order 13224 of September 23, 2001 Blocking Property and Prohibiting Transactions With Persons Who Commit, Threaten to Commit, or Support Terrorism (66 Fed. Reg. 49079 (2001).
Patriot Act ” means Public Law 107-56 of the United States of America, United and Strengthening America by Providing Appropriate Tools Required to Intercept and Obstruct Terrorism (USA PATRIOT Act) Act of 2001.
Permitted Liens ” means (a) Liens existing on the date of this Agreement and disclosed on Schedule 6.1(a); (b) Liens for taxes, fees, assessments and other governmental charges to the extent that payment of the same may be postponed or to the extent to which adequate reserves have been established and are being maintained in accordance with GAAP; (c) Liens in favor of banking institutions arising in the ordinary course of business as a matter of law encumbering deposits (including the right of set-off) and which are within the general parameters customary in the banking industry; (d) landlords’ and lessors’ liens or liens in respect of pledges or deposits under worker’s compensation, unemployment insurance, social security laws, or similar legislation or in connection with appeal and similar bonds incidental to litigation; mechanics’, laborers’, carriers’, warehouseman’s, materialmen’s and similar liens; (e) liens securing the performance of bids, tenders, contracts and statutory obligations incidental to the conduct of the Borrower’s business and that do not in the aggregate materially detract from the value of its property or materially impair the use thereof in the operation of its business; (f) judgment liens that shall not have been in existence for a period longer than 30 days after the creation thereof or, if a stay of execution shall have been obtained, for a period longer than 30 days after the expiration of such stay; (g) easements, rights of way, restrictions and other similar charges or Liens relating to real property and not interfering in a material way with the ordinary conduct of the Borrower’s business; and (h) Liens securing purchase money Indebtedness; provided that such Liens do not at any time encumber any property other than the property financed by such Indebtedness.
Person or “person” means an individual, a company, a corporation, an association, a partnership, a joint venture, a limited liability company or partnership, an unincorporated trade or business enterprise, a trust, an estate, or a government (national, regional or local) or an agency, instrumentality or official thereof.
Prior Agreement ” has the meaning specified in the recitals .
Property ” means any interest in any kind of property or asset, whether real, personal or mixed, or tangible or intangible.
Regulation D ” means Regulation D under the Securities Act.
Required Purchasers ” has the meaning specified in Section 5.13(a) .

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SEC Documents ” has the meaning specified in Section 3.7 .
“Securities” means, collectively, the Notes, the Warrants and the Warrant Interests.
“Securities Act” means the Securities Act of 1933, as amended.
Subordination Agreement has the meaning specified in Section 1.9 .
Subsequent Closing has the meaning specified in Section 1.1(d) .
Subsequent Closing Date means consummation of the transactions to occur on each Subsequent Closing Date hereunder.
Subsidiary means any corporation, association, joint stock company, business trust or other similar organization of which more than 50% of the ordinary voting power for the election of a majority of the members of the board of directors or other governing body of such entity is held or controlled by a Person or a Subsidiary of such Person; or any other such organization the management of which is directly or indirectly controlled by a Person or a Subsidiary of such Person through the exercise of voting power or otherwise; or any joint venture, whether incorporated or not, in which a Person has a more than 50% ownership interest.
Total Commitment” shall mean the aggregate amount each Purchaser has agreed to loan to the Borrower pursuant to this Agreement as set forth opposite each Purchaser’s name on Schedule 1.1 under the heading “Total Commitment.”
Transaction ” has the meaning specified in Section 3.2 .
Warrant Holders ” means, at any time, the holders of the Warrants at such time.
Warrant Interests ” means all Common Stock issuable upon the exercise of the Warrants.
Warrants ” or “ 2015 Warrants ” has the meaning specified in Section 1.1 (which warrants shall be in the form attached hereto as Exhibit II).
SECTION 6.2      Terms Generally . The definitions in Section 6.1 apply equally to both the singular and plural forms of the terms defined. Whenever the context may require, any pronoun includes the corresponding masculine, feminine and neuter forms. The words “include,” “includes” and “including” are deemed to be followed by the phrase “without limitation.” The words “ordinary course of business” are deemed to be followed by the phrase “consistent with past practice.” All references herein to Articles, Sections, Exhibits and Schedules are deemed references to Articles and Sections of, and Exhibits and Schedules to, this Agreement unless the context shall otherwise require. Except as otherwise expressly provided herein, (a) any reference in this Agreement to any Investment Document means such document as amended, restated, supplemented or otherwise modified from time to time and (b) all terms of an accounting or financial nature are construed in accordance with GAAP, as in effect from time to time; provided that, if any change in GAAP results in a change in the calculation of the financial covenants or interpretation of the related provisions of this Agreement or any other Investment Document, then the Borrower and Required Purchasers agree to amend such provisions of this Agreement so as to equitably reflect such changes in GAAP

22
6622466



with the desired result that the criteria for evaluating the Borrower’s financial condition shall be the same after such change in GAAP as if such change had not been made and, until such time as this Agreement is so amended, the calculations of financial covenants and the interpretation of any related provisions shall be calculated and interpreted in accordance with GAAP as in effect immediately prior to such change in GAAP.
*    *    *
[ Signatures on following page ]


23
6622466



IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be duly executed by their respective authorized officers as of the day and year first above written.
BORROWER:
AGENUS INC.  
By:     /s/ Christine Klaskin         
   Name: Christine Klaskin  
   Title: Vice President, Finance




ACKNOWLEDGED AND AGREED:


EXISTING PURCHASERS:

By:     /s/ Mark Berg            
   Name: Mark Berg  
By:     /s/ Nicole Berg            
   Name: Nicole Berg




ACKNOWLEDGED AND AGREED:


EXISTING PURCHASER:

By:     /s/ Alice Saraydarian       
Name: Alice Saraydarian  
    




ACKNOWLEDGED AND AGREED:


EXISTING PURCHASER:

By:     /s/ Khajak Keledjian    
Name: Khajak Keledjian  
    





ACKNOWLEDGED AND AGREED:


NEW PURCHASER:

E*TRADE Clearing LLC, not in its corporate capacity but solely as Custodian of the Individual Retirement Account of Mark Berg, and at the direction of Mark Berg.  Further, all representations, warranties, covenants and agreements set forth herein are being made by Mark Berg as owner of the Individual Retirement Account, and not by E*TRADE Clearing LLC
 
By:     /s/ Matthew A. Murray       
Name: Matthew A. Murray
Title: Vice President  
    




ACKNOWLEDGED AND AGREED:


NEW PURCHASER:

NICKY V LLC  
By:     /s/ Nicole Berg          
Name: Nicole Berg
Title: Owner  
    




ACKNOWLEDGED AND AGREED:


NEW PURCHASER:

MSB RESEARCH INC.  
By:     /s/ Mark Berg          
Name: Mark Berg
Title: President  
    




ACKNOWLEDGED AND AGREED:


NEW PURCHASER:

By:     /s/ Khalil Barrage       
Name: Khalil Barrage  
    








ACKNOWLEDGED AND AGREED:


NEW PURCHASER:

Jaymon Investments, LLC  
By:     /s/ Jack Shevel          
Name: Jack Shevel
Title: Manager  

    








Schedule 1.1
 
2015 NOTES
WARRANTS
Purchaser
Type of Purchaser
2013 Note Principal Rollover Amount
New Cash Commitment to Purchase 2015 Notes
Total Commitment
Outstanding 2013 Warrants
Allocation of 2015 Warrants
Mark Berg and Nicole Berg
Existing Purchaser
$4,000,000
n/a
$4,000,000
400,000
400,000
Alice Saraydarian
Existing Purchaser
$500,000
$500,000
$1,000,000
50,000
100,000
Khajak Keledjian
Existing Purchaser
$500,000
n/a
$500,000
50,000
50,000
Nicky V LLC
New Purchaser
n/a
$4,500,000
$4,500,000
n/a
450,000
MSB Research Inc.
New Purchaser
n/a
$1,500,000
$1,500,000
n/a
150,000
Khalil Barrage
New Purchaser
n/a
$500,000
$500,000
n/a
50,000
E*TRADE Clearing LLC, Custodian FBO: Mark Berg IRA #[**]
New Purchaser
n/a
$1,500,000
$1,500,000
n/a
150,000
Jaymon Investments, LLC
New Purchaser
n/a
$500,000
$500,000
n/a
50,000
 
 
Total:  $5,000,000
Total:  $9,000,000
Total:  $14,000,000
Total:  
500,000
Total:  
1,400,000


[**] = Portions of this exhibit have been omitted pursuant to a confidential treatment request. An unredacted version of this exhibit has been filed separately with the Commission.




Schedule 5.1
Contact Information of Purchasers for Notices
Mark & Nicole Berg
[**]
Khajak Keledjian
[**]

Alice Saraydarian
[**]

Nicky V LLC
[**]
Attn: Nicole Berg
MSB Research Inc.
[**]
Attn: Mark Berg
Khalil Barrage
[**]

E*TRADE Clearing LLC, Custodian FBO: Mark Berg IRA #[**]
Harborside Financial Center
501 Plaza 2
34 Exchange Place
Jersey City, NJ 07311
Attn: Alternative Investments Department
Jaymon Investments, LLC
[**]
Attn: Jack Shevel





[**] = Portions of this exhibit have been omitted pursuant to a confidential treatment request. An unredacted version of this exhibit has been filed separately with the Commission.




Schedule 6.1
Permitted Liens
Liens pursuant to that certain Loan and Security Agreement, dated as of April 15, 2013, by and among Silicon Valley Bank, Agenus Inc. and Antigenics Inc.
Liens consisting of and limited to the rights of Ingalls & Snyder Value Partners L.P. and Arthur Koenig (and their successors and assigns) to receive the following payments pursuant to that certain Revenue Interests Assignment Agreement (the “ Revenue Interests Assignment Agreement ”) by and among Agenus Inc., Antigenics Inc., Ingalls & Snyder Value Partners L.P. and Arthur Koenig, dated as of April 15, 2013 (as in effect on April 15, 2013): (i) twenty percent (20.0%) of all revenue payments payable to Borrower and/or its Affiliates pursuant to the GSK and Janssen Agreements (as defined below) (as in effect on April 15, 2013), (ii) one-half of one percent (0.50%) of HerpV Net Sales (as defined in the Revenue Interests Assignment Agreement as in effect on April 15, 2013) and (iii) the greater of [**] percent ([**]%) of the total consideration paid to Borrower and [**] Dollars ($[**]) in the event of the disposition of the [**]. As used herein, “ GSK and Janssen Agreements ” means, collectively, (i) that certain amended and restated manufacturing technology transfer agreement dated January 16, 2009 by and between GlaxoSmithKline Biologicals SA and Antigenics Inc.(as amended by that certain first right to negotiate and amendment agreement effective March 2, 2012, and as further amended or modified from time to time) (ii) that certain license agreement dated as of July 6, 2006 by and between GlaxoSmithKline Biologicals SA and Antigenics Inc. (as amended by that certain binding letter of intent dated July 20, 2007, and as further amended or modified from time to time) and (iii) that certain amended and restated license agreement dated as of September 14, 2009, by and between Antigenics Inc., Elan Pharma International Limited and Elan Pharmaceuticals, Inc. (as amended or modified from time to time), as assigned to Janssen Alzheimer Immunotherapy on July 2, 2009.



[**] = Portions of this exhibit have been omitted pursuant to a confidential treatment request. An unredacted version of this exhibit has been filed separately with the Commission.




Exhibit I
FORM OF 8% SENIOR SUBORDINATED NOTE
[ see attached ]





Exhibit II
FORM OF WARRANT
[ see attached ]

EXHIBIT 4.3

THIS NOTE HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR APPLICABLE STATE SECURITIES LAWS. THIS NOTE MAY NOT BE OFFERED FOR SALE, SOLD, TRANSFERRED OR ASSIGNED IN THE ABSENCE OF (A) AN EFFECTIVE REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933, AS AMENDED, AND APPLICABLE STATE SECURITIES LAWS, OR (B) THE TRANSFEROR PROVIDES THE BORROWER WITH REASONABLE ASSURANCES AND CUSTOMARY REPRESENTATIONS THAT REGISTRATION IS NOT REQUIRED UNDER SAID ACT AND APPLICABLE STATE SECURITIES LAWS.
FOR PURPOSES OF SECTION 1273 OF THE INTERNAL REVENUE CODE OF 1986, AS AMENDED (THE “ CODE ”), THIS NOTE HAS ORIGINAL ISSUE DISCOUNT. PURCHASER MAY OBTAIN INFORMATION REGARDING THE AMOUNT OF ANY ORIGINAL ISSUE DISCOUNT, THE ISSUE PRICE, THE ISSUE DATE AND THE YIELD TO MATURITY OF THE NOTES AND THE ALLOCATION OF THE PURCHASE PRICE BETWEEN THE WARRANTS AND THE NOTES BY CONTACTING THE BORROWER AT 3 FORBES ROAD, LEXINGTON, MA 02421, ATTENTION: VICE PRESIDENT OF FINANCE, FACSIMILE: (781) 674-4200.
THIS NOTE AND THE RIGHTS AND OBLIGATIONS EVIDENCED HEREBY ARE SUBORDINATE IN THE MANNER AND TO THE EXTENT SET FORTH IN THAT CERTAIN SUBORDINATION AGREEMENT (THE “ SUBORDINATION AGREEMENT ”), DATED AS OF APRIL 15, 2013, AMONG SILICON VALLEY BANK, A CALIFORNIA CORPORATION, AND EACH OF THE PARTIES LISTED ON SCHEDULE 1 TO SUCH SUBORDINATION AGREEMENT, AS AMENDED FROM TIME TO TIME, TO CERTAIN SENIOR DEBT AS DESCRIBED IN SUCH SUBORDINATION AGREEMENT, AND EACH HOLDER OF THIS INSTRUMENT, BY ITS ACCEPTANCE HEREOF, SHALL BE BOUND BY THE PROVISIONS OF THE SUBORDINATION AGREEMENT.
FORM OF SENIOR SUBORDINATED NOTE
US$_________                                _____________, 2015
FOR VALUE RECEIVED , AGENUS INC., a Delaware corporation (the “ Borrower ”), hereby promises to pay to [ insert name of Purchaser ], a [ insert type of entity ] (“ Purchaser ”), the principal sum of US$[ insert amount ] or such lesser principal amount then outstanding, together with all accrued and unpaid interest thereon, on February 20, 2018. Interest on the principal amount of this Note shall accrue from and including the date hereof to and including the date such principal amount is paid, at the rate of 8.0% per annum, payable on the first day of each month in arrears, on the unpaid principal amount of this Note outstanding from time to time. Interest shall be computed on the basis of a 365-day year and the actual number of days elapsed.
This Note is one of the Senior Subordinated Notes issued pursuant to the Amended and Restated Note Purchase Agreement dated as of February 20, 2015 among the Borrower and the Purchasers party thereto, as amended (the “ Note Purchase Agreement ”). A copy of the Note Purchase Agreement may be examined upon reasonable notice during normal business hours at the offices of the Borrower. The Note Purchase Agreement contains terms governing the rights of the Purchaser




of this Note, and all provisions of the Note Purchase Agreement are hereby incorporated herein in full by reference. To the extent that (i) the terms of this Note require the Borrower to obtain the consent or approval of the Purchasers or (ii) the Borrower seeks an amendment to or modification or waiver of any of the terms of this Note, such Approval shall be made by the Required Purchasers. Notwithstanding the foregoing, the Purchaser may, in its sole discretion, agree to any consent, approval, action, termination, amendment or waiver that solely effects the rights of the Purchaser under this Note. Any capitalized term used herein and not otherwise defined herein shall have the meaning assigned to it in the Note Purchase Agreement.
This Note shall be prepayable in whole or in part at any time without premium or penalty at the option of the Borrower.
Upon the commencement of any bankruptcy, composition, adjustment of debt, relief of debtors, involuntary dissolution, insolvency proceeding or involuntary liquidation or similar proceeding under the laws of any jurisdiction with respect to the Borrower, the unpaid principal amount hereof, shall become immediately due and payable.
No failure or delay on the part of the Purchaser in exercising any of its rights, powers or privileges hereunder shall operate as a waiver thereof, nor shall a single or partial exercise thereof preclude any other or further exercise of any right, power or privilege. The remedies provided herein are cumulative and are not exclusive of any remedies provided by law.
Neither the Borrower nor other parties hereafter becoming liable for payment of this Note shall ever be required to pay interest on this Note at a rate in excess of the maximum interest that may be lawfully charged under applicable law, and the provisions of this paragraph shall control over all provisions of this Note which may be in apparent conflict herewith. In the event that the Purchaser shall collect monies which are deemed to constitute interest which would increase the effective rate of this Note to a rate in excess of that permitted to be charged by applicable law, all such sums deemed to constitute interest in excess of the lawful rate shall, upon such determination, at the option of the Purchaser, be either immediately returned to the Borrower or credited against the principal balance of this Note then outstanding, in which event any and all penalties of any kind under applicable law as a result of such excess interest shall be applicable.
This Note shall be governed by and construed in accordance with the laws of the State of New York.
* * * *








IN WITNESS WHEREOF , the undersigned has executed this Note as of the date first written above.
AGENUS INC.
By:                         
Name:
Title:

[Senior Subordinated Note]
EXHIBIT 4.4

FORM OF WARRANT
THIS WARRANT AND THE SECURITIES ISSUABLE UPON EXERCISE OF THIS WARRANT HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “ ACT ”), OR QUALIFIED UNDER ANY STATE OR FOREIGN SECURITIES LAWS AND MAY NOT BE OFFERED FOR SALE, SOLD, PLEDGED, HYPOTHECATED OR OTHERWISE TRANSFERRED OR ASSIGNED UNLESS (I) A REGISTRATION STATEMENT COVERING SUCH SHARES IS EFFECTIVE UNDER THE ACT AND IS QUALIFIED UNDER APPLICABLE STATE AND FOREIGN LAW OR (II) THE TRANSACTION IS EXEMPT FROM THE REGISTRATION AND PROSPECTUS DELIVERY REQUIREMENTS UNDER THE ACT AND THE QUALIFICATION REQUIREMENTS UNDER APPLICABLE STATE AND FOREIGN LAW AND, IF THE CORPORATION REQUESTS, AN OPINION SATISFACTORY TO THE CORPORATION TO SUCH EFFECT HAS BEEN RENDERED BY COUNSEL.
Warrant Certificate No.: ______             Original Issue Date: February __, 2015
FOR VALUE RECEIVED, Agenus Inc., a Delaware corporation (the “ Company ”), hereby certifies that ____________________, or [his]/[her]/their registered assigns (the “ Holder ”) is entitled to purchase from the Company _______ duly authorized, validly issued, fully paid and nonassessable shares of Common Stock at a purchase price per share of $5.10 (subject to adjustment as provided herein, the “ Exercise Price ”), all subject to the terms, conditions and adjustments set forth below in this Warrant. Certain capitalized terms used herein are defined in Section 1 hereof.
This Warrant has been issued pursuant to the terms of the Amended and Restated Note Purchase Agreement, dated as of February 20, 2015, as amended (the “ Purchase Agreement ”), between the Company and the Holder.
1. Definitions . As used in this Warrant, the following terms have the respective meanings set forth below:
Aggregate Exercise Price ” means an amount equal to the product of (a) the number of Warrant Shares in respect of which this Warrant is then being exercised pursuant to Section 3 hereof, multiplied by (b) the Exercise Price in effect as of the Exercise Date in accordance with the terms of this Warrant.
Board ” means the board of directors of the Company.
Business Day ” means any day other than (i) a Saturday or Sunday or (ii) a day on which banking institutions located in New York City are closed.
Common Stock ” means the common stock, par value $0.01 per share, of the Company, and any capital stock into which such Common Stock shall have been converted, exchanged or reclassified following the date hereof.

- 1 -


Common Stock Deemed Outstanding ” means, at any given time, the number of shares of Common Stock actually outstanding at such time, less shares owned or held by or for the account of the Company or any of its wholly owned subsidiaries.
Company ” has the meaning set forth in the preamble.
Exercise Date ” means, for any given exercise of this Warrant, the date on which the conditions to such exercise as set forth in Section 3 shall have been satisfied at or prior to 5:00 p.m., New York City time, on a Business Day, including, without limitation, the receipt by the Company of the Exercise Agreement, the Warrant and the Aggregate Exercise Price.
Exercise Agreement ” has the meaning set forth in Section 3(a)(i) .
Exercise Period ” has the meaning set forth in Section 2 .
Exercise Price ” has the meaning set forth in the preamble.
Fair Market Value ” means, as of any particular date: (a) the volume weighted average of the closing sales prices of the Common Stock for such day on all domestic securities exchanges on which the Common Stock may at the time be listed; (b) if there have been no sales of the Common Stock on any such exchange on any such day, the average of the highest bid and lowest asked prices for the Common Stock on all such exchanges at the end of such day; (c) if on any such day the Common Stock is not listed on a domestic securities exchange, the closing sales price of the Common Stock as quoted on Nasdaq, the OTC Bulletin Board or similar quotation system or association for such day; or (d) if there have been no sales of the Common Stock on Nasdaq, the OTC Bulletin Board or similar quotation system or association on such day, the average of the highest bid and lowest asked prices for the Common Stock quoted on Nasdaq, the OTC Bulletin Board or similar quotation system or association at the end of such day; in each case, averaged over twenty (20) consecutive Business Days ending on the Business Day immediately prior to the day as of which “Fair Market Value” is being determined; provided , that if the Common Stock is listed on any domestic securities exchange, the term “Business Day” as used in this sentence means Business Days on which such exchange is open for trading. If at any time the Common Stock is not listed on any domestic securities exchange or quoted on Nasdaq, the OTC Bulletin Board or similar quotation system or association, the “Fair Market Value” of the Common Stock shall be the fair market value per share as determined jointly by the Board and the Holder.
Holder ” has the meaning set forth in the preamble.
Original Issue Date ” means February [ ], 2015, the date on which the Warrant was issued by the Company pursuant to the Purchase Agreement.
Nasdaq ” means The Nasdaq Stock Market, Inc.

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Person ” means any individual, sole proprietorship, partnership, limited liability company, corporation, joint venture, trust, incorporated organization or government or department or agency thereof.
Purchase Agreement ” has the meaning set forth in the preamble.
Trading Day ” means a day on which Nasdaq is open for trading.
Warrant ” means this Warrant and all warrants issued upon division or combination of, or in substitution for, this Warrant.
Warrant Shares ” means the shares of Common Stock or other capital stock of the Company then purchasable upon exercise of this Warrant in accordance with the terms of this Warrant.
2.      Term of Warrant . Subject to the terms and conditions hereof, at any time or from time to time after the date hereof and prior to 5:00 p.m., New York City time, on the fifth (5th) anniversary of the date hereof or, if such day is not a Business Day, on the next preceding Business Day (the “ Exercise Period ”), the Holder of this Warrant may exercise this Warrant for all or any part of the Warrant Shares purchasable hereunder (subject to adjustment as provided herein).
3.      Exercise of Warrant .
(a)      Exercise Procedure . This Warrant may be exercised from time to time on any Business Day during the Exercise Period, for all or any part of the unexercised Warrant Shares, upon:
(i)      surrender of this Warrant to the Company at its then principal executive offices (or an indemnification undertaking with respect to this Warrant in the case of its loss, theft or destruction), together with an Exercise Agreement in the form attached hereto as Exhibit A (each, an “ Exercise Agreement ”), duly completed (including specifying the number of Warrant Shares to be purchased) and executed; and
(ii)      payment to the Company of the Aggregate Exercise Price in accordance with Section 3(b) or completion of a cashless exercise in accordance with Section 3(c) .
(b)      Payment of the Aggregate Exercise Price . At the option of the Holder, payment of the Aggregate Exercise Price for any exercise of this Warrant shall be made (i) by delivery to the Company of a certified or official bank check payable to the order of the Company, (ii) by wire transfer of immediately available funds to an account designated in writing by the Company, (iii) by cashless exercise as provided in Section 3(c) below, or (iv) by any permissible combination of such methods, in the amount of such Aggregate Exercise Price.
(c)      Cashless Exercise . This Warrant may be exercised at the Holder’s election, in whole or in part, by means of a “cashless exercise” in which the Holder shall be

- 3 -


entitled to receive a number of Warrant Shares equal to the quotient obtained by dividing [(A-B) (X)] by (A), where:
(A)    =    the Fair Market Value of one share of Common Stock as of the Trading Day immediately preceding the date of such exercise;
(B)     =     the Exercise Price, as adjusted hereunder; and
(X)     =     the number of shares of Common Stock that would be issuable upon exercise of this Warrant in accordance with the terms of this Warrant if such exercise were by means of a cash exercise rather than a cashless exercise.
Notwithstanding anything to the contrary herein or in the Purchase Agreement, the Holder agrees that the Holder’s ability to elect a cashless exercise represents the sole and exclusive monetary remedy of the Holder for a registration default with respect to the Warrant Shares, and in no event shall the Company be required to satisfy the Warrant through net cash settlement.
(d)      Delivery of Stock Certificates . Upon receipt by the Company of the Exercise Agreement, surrender of this Warrant and payment of the Aggregate Exercise Price (in accordance with Section 3(a) hereof), the Company shall, as promptly as practicable, execute (or cause to be executed) and deliver (or cause to be delivered) to the Holder a certificate or certificates representing the Warrant Shares issuable upon such exercise, together with cash in lieu of any fraction of a share, as provided in Section 3(e) hereof. The stock certificate or certificates so delivered shall be, to the extent possible, in such denomination or denominations as the exercising Holder shall reasonably request in the Exercise Agreement and shall be registered in the name of the Holder or, subject to compliance with Section 5 below, such other Person’s name as shall be designated in the Exercise Agreement. This Warrant shall be deemed to have been exercised and such certificate or certificates of Warrant Shares shall be deemed to have been issued, and the Holder or any other Person so designated to be named therein shall be deemed to have become a holder of record of such Warrant Shares for all purposes, as of the Exercise Date.
(e)      Fractional Shares . The Company shall not be required to issue a fractional Warrant Share upon exercise of any Warrant. As to any fraction of a Warrant Share that the Holder would otherwise be entitled to purchase upon such exercise, the Company shall pay to such Holder an amount in cash (by delivery of a certified or official bank check or by wire transfer of immediately available funds) equal to the product of (i) such fraction multiplied by (ii) the Fair Market Value of one Warrant Share on the Exercise Date.
(f)      Valid Issuance of Warrant and Warrant Shares; Payment of Taxes . With respect to the exercise of this warrant, the Company hereby represents, covenants and agrees:
(i)      This Warrant is, and any Warrant issued in substitution for or replacement of this Warrant shall be, upon issuance, duly authorized and validly issued.

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(ii)      All Warrant Shares issuable upon the exercise of this Warrant pursuant to the terms hereof shall be, upon issuance, and the Company shall take all such actions as may be necessary or appropriate in order that such Warrant Shares are, validly issued, fully paid and non-assessable, issued without violation of any preemptive or similar rights of any stockholder of the Company and free and clear of all taxes, liens and charges.
(iii)      The Company shall take all such actions as may be necessary to ensure that all such Warrant Shares are issued without violation by the Company of any applicable law or governmental regulation or any requirements of any domestic securities exchange upon which shares of Common Stock or other securities constituting Warrant Shares may be listed at the time of such exercise (except for official notice of issuance which shall be immediately delivered by the Company upon each such issuance).
(iv)      The Company shall pay all expenses in connection with, and all taxes and other governmental charges that may be imposed with respect to, the issuance or delivery of Warrant Shares upon exercise of this Warrant; provided, that the Company shall not be required to pay any tax or governmental charge that may be imposed with respect to any applicable withholding or the issuance or delivery of the Warrant Shares to any Person other than the Holder, and no such issuance or delivery shall be made unless and until the Person requesting such issuance has paid to the Company the amount of any such tax, or has established to the satisfaction of the Company that such tax has been paid.
(g)      Conditional Exercise . Notwithstanding any other provision hereof, if an exercise of any portion of this Warrant is to be made in connection with a public offering or a sale of the Company (pursuant to a merger, sale of stock, or otherwise), such exercise may at the election of the Holder be conditioned upon the consummation of such transaction, in which case such exercise shall not be deemed to be effective until immediately prior to the consummation of such transaction.
(h)      Reservation of Shares . During the Exercise Period, the Company shall at all times reserve and keep available out of its authorized but unissued Common Stock or other securities constituting Warrant Shares, solely for the purpose of issuance upon the exercise of this Warrant, the maximum number of Warrant Shares issuable upon the exercise of this Warrant, and the par value per Warrant Share shall at all times be less than or equal to the applicable Exercise Price. The Company shall not increase the par value of any Warrant Shares receivable upon the exercise of this Warrant above the Exercise Price then in effect, and shall take all such actions as may be necessary or appropriate in order that the Company may validly and legally issue fully paid and nonassessable shares of Common Stock upon the exercise of this Warrant.
4.      Adjustment to Exercise Price and Number of Warrant Shares . In order to prevent dilution of the purchase rights granted under this Warrant, the Exercise Price and the number of Warrant Shares issuable upon exercise of this Warrant shall be subject to adjustment from time to time as provided in this Section 4 .
(a)      Adjustment to Exercise Price and Warrant Shares Upon Dividend, Subdivision or Combination of Common Stock . If the Company shall, at any time or from

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time to time after the Original Issue Date, (i) pay a dividend or make any other distribution upon the Common Stock or any other capital stock of the Company payable in shares of Common Stock, or (ii) subdivide (by any stock split, recapitalization or otherwise) its outstanding shares of Common Stock into a greater number of shares, the Exercise Price in effect immediately prior to any such dividend, distribution or subdivision shall be proportionately reduced and the number of Warrant Shares issuable upon exercise of this Warrant shall be proportionately increased. If the Company at any time combines (by combination, reverse stock split or otherwise) its outstanding shares of Common Stock into a smaller number of shares, the Exercise Price in effect immediately prior to such combination shall be proportionately increased and the number of Warrant Shares issuable upon exercise of this Warrant shall be proportionately decreased. Any adjustment under this Section 4(a) shall become effective at the close of business on the date the dividend, subdivision or combination becomes effective.
(b)      Adjustment to Exercise Price and Warrant Shares Upon Reorganization, Reclassification, Consolidation or Merger . In case the Company after the date hereof (a) shall consolidate with or merge into any other Person and shall not be the continuing or surviving corporation of such consolidation or merger, or (b) shall permit any other Person to consolidate with or merge into the Company and the Company shall be the continuing or surviving Person but, in connection with such consolidation or merger, the Common Stock shall be changed into or exchanged for stock or other securities of any other Person or cash or any other property, or (c) shall transfer all or substantially all of its properties or assets to any other Person, then, and in the case of each such transaction, proper provision shall be made so that, upon the basis and the terms and in the manner provided in this Warrant, this Warrant shall be terminated upon the consummation of the transaction and the holder of this Warrant shall be entitled to receive upon such consummation, in the same form of consideration as received by the shareholders, the excess, if any, of (i) the fair market value of the securities, cash or other property to which such holder would actually have been entitled as a shareholder upon such consummation if such holder had exercised the rights represented by this Warrant immediately prior thereto, less (ii) the aggregate exercise price payable upon exercise in full of this Warrant.
(c)      Certificate as to Adjustment .
(i)      As promptly as reasonably practicable following any adjustment of the Exercise Price, the Company shall furnish to the Holder a certificate of an executive officer setting forth in reasonable detail such adjustment and the facts upon which it is based and certifying the calculation thereof.
(ii)      As promptly as reasonably practicable following the receipt by the Company of a written request by the Holder, the Company shall furnish to the Holder a certificate of an executive officer certifying the Exercise Price then in effect and the number of Warrant Shares or the amount, if any, of other shares of stock, securities or assets then issuable upon exercise of the Warrant.

- 6 -


(d)      Notices . In the event:
(i)      that the Company shall take a record of the holders of its Common Stock (or other capital stock or securities at the time issuable upon exercise of the Warrant) for the purpose of entitling or enabling them to receive any dividend or other distribution, to vote at a meeting (or by written consent), to receive any right to subscribe for or purchase any shares of capital stock of any class or any other securities, or to receive any other security; or
(ii)      of any capital reorganization of the Company, any reclassification of the Common Stock of the Company, any consolidation or merger of the Company with or into another Person, or sale of all or substantially all of the Company’s assets to another Person; or
(iii)      of the voluntary or involuntary dissolution, liquidation or winding-up of the Company;
then, and in each such case, the Company shall send or cause to be sent to the Holder at least fifteen (15) days prior to the applicable record date or the applicable expected effective date, as the case may be, for the event, a written notice specifying, as the case may be, (A) the record date for such dividend, distribution, meeting or consent or other right or action, and a description of such dividend, distribution or other right or action to be taken at such meeting or by written consent, or (B) the effective date on which such reorganization, reclassification, consolidation, merger, sale, dissolution, liquidation or winding-up is proposed to take place, and the date, if any is to be fixed, as of which the books of the Company shall close or a record shall be taken with respect to which the holders of record of Common Stock (or such other capital stock or securities at the time issuable upon exercise of the Warrant) shall be entitled to exchange their shares of Common Stock (or such other capital stock or securities) for securities or other property deliverable upon such reorganization, reclassification, consolidation, merger, sale, dissolution, liquidation or winding-up, and the amount per share and character of such exchange applicable to the Warrant and the Warrant Shares.
5.      Transfer of Warrant . Subject to the transfer conditions referred to in the legend endorsed hereon and the terms and conditions of this Warrant and all rights hereunder are transferable, in whole or in part, by the Holder without charge to the Holder, upon surrender of this Warrant to the Company at its then principal executive offices with a properly completed and duly executed Assignment in the form attached hereto as Exhibit B , together with funds sufficient to pay any transfer taxes described in Section 3(f)(iv) in connection with the making of such transfer. Upon such compliance, surrender and delivery and, if required, such payment, the Company shall execute and deliver a new Warrant or Warrants in the name of the assignee or assignees and in the denominations specified in such instrument of assignment, and shall issue to the assignor a new Warrant evidencing the portion of this Warrant, if any, not so assigned and this Warrant shall promptly be cancelled.
6.      Holder Not Deemed a Stockholder; Limitations on Liability . Except as otherwise specifically provided herein, prior to the issuance to the Holder of the Warrant Shares to which the Holder is then entitled to receive upon the due exercise of this Warrant, the Holder shall not be entitled to vote or receive dividends or be deemed the holder of shares of capital stock of the

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Company for any purpose, nor shall anything contained in this Warrant be construed to confer upon the Holder, as such, any of the rights of a stockholder of the Company or any right to vote, give or withhold consent to any corporate action (whether any reorganization, issue of stock, reclassification of stock, consolidation, merger, conveyance or otherwise), receive notice of meetings, receive dividends or subscription rights, or otherwise. In addition, nothing contained in this Warrant shall be construed as imposing any liabilities on the Holder to purchase any securities (upon exercise of this Warrant or otherwise) or as a stockholder of the Company, whether such liabilities are asserted by the Company or by creditors of the Company.
7.      Replacement on Loss; Division and Combination .
(a)      Replacement of Warrant on Loss . Upon receipt of evidence reasonably satisfactory to the Company of the loss, theft, destruction or mutilation of this Warrant and upon delivery of an indemnity reasonably satisfactory to it (it being understood that a written indemnification agreement or affidavit of loss of the Holder shall be a sufficient indemnity) and, in case of mutilation, upon surrender of such Warrant for cancellation to the Company, the Company at its own expense shall execute and deliver to the Holder, in lieu hereof, a new Warrant of like tenor and exercisable for an equivalent number of Warrant Shares as the Warrant so lost, stolen, mutilated or destroyed; provided , that, in the case of mutilation, no indemnity shall be required if this Warrant in identifiable form is surrendered to the Company for cancellation.
(b)      Division and Combination of Warrant . Subject to compliance with the applicable provisions of this Warrant as to any transfer or other assignment which may be involved in such division or combination, this Warrant may be divided or, following any such division of this Warrant, subsequently combined with other Warrants, upon the surrender of this Warrant or Warrants to the Company at its then principal executive offices, together with a written notice specifying the names and denominations in which new Warrants are to be issued, signed by the respective Holders or their agents or attorneys. Subject to compliance with the applicable provisions of this Warrant as to any transfer or assignment which may be involved in such division or combination, the Company shall at its own expense execute and deliver a new Warrant or Warrants in exchange for the Warrant or Warrants so surrendered in accordance with such notice. Such new Warrant or Warrants shall be of like tenor to the surrendered Warrant or Warrants and shall be exercisable in the aggregate for an equivalent number of Warrant Shares as the Warrant or Warrants so surrendered in accordance with such notice.
8.      No Impairment . The Company shall not, by amendment of its Certificate of Incorporation or Bylaws, 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 by it hereunder, but shall at all times in good faith assist in the carrying out of all the provisions of this Warrant and in the taking of all such action as may reasonably be requested by the Holder in order to protect the exercise rights of the Holder against dilution or other impairment, consistent with the tenor and purpose of this Warrant.

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9.      Compliance with the Securities Act .
(a)      Agreement to Comply with the Securities Act; Legend . The Holder, by acceptance of this Warrant, agrees to comply in all respects with the provisions of this Section 9 and the restrictive legend requirements set forth on the face of this Warrant and further agrees that such Holder shall not offer, sell or otherwise dispose of this Warrant or any Warrant Shares to be issued upon exercise hereof except under circumstances that will not result in a violation of the Securities Act of 1933, as amended (the “ Securities Act ”). This Warrant and all Warrant Shares issued upon exercise of this Warrant (unless registered under the Securities Act) shall be stamped or imprinted with a legend in substantially the following form:
“THIS WARRANT AND THE SECURITIES ISSUABLE UPON EXERCISE OF THIS WARRANT HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “ACT”), OR QUALIFIED UNDER ANY STATE OR FOREIGN SECURITIES LAWS AND MAY NOT BE OFFERED FOR SALE, SOLD, PLEDGED, HYPOTHECATED OR OTHERWISE TRANSFERRED OR ASSIGNED UNLESS (I) A REGISTRATION STATEMENT COVERING SUCH SHARES IS EFFECTIVE UNDER THE ACT AND IS QUALIFIED UNDER APPLICABLE STATE AND FOREIGN LAW OR (II) THE TRANSACTION IS EXEMPT FROM THE REGISTRATION AND PROSPECTUS DELIVERY REQUIREMENTS UNDER THE ACT AND THE QUALIFICATION REQUIREMENTS UNDER APPLICABLE STATE AND FOREIGN LAW AND, IF THE CORPORATION REQUESTS, AN OPINION SATISFACTORY TO THE CORPORATION TO SUCH EFFECT HAS BEEN RENDERED BY COUNSEL.”
(b)      Representations of the Holder . In connection with the issuance of this Warrant, the Holder specifically represents, as of the date hereof, to the Company by acceptance of this Warrant as follows:
(i)      The Holder is an “accredited investor” as defined in Rule 501 of Regulation D promulgated under the Securities Act. The Holder is acquiring this Warrant and the Warrant Shares to be issued upon exercise hereof for investment for its own account and not with a view towards, or for resale in connection with, the public sale or distribution of this Warrant or the Warrant Shares, except pursuant to sales registered or exempted under the Securities Act.
(ii)      The Holder understands and acknowledges that this Warrant and the Warrant Shares to be issued upon exercise hereof are “restricted securities” under the federal securities laws inasmuch as they are being acquired from the Company in a transaction not involving a public offering and that, under such laws and applicable regulations, such securities may be resold without registration under the Securities Act only in certain limited circumstances. In addition, the Holder represents that it is familiar with Rule 144 under the Securities Act, as presently in effect, and understands the resale limitations imposed thereby and by the Securities Act.

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(iii)      The Holder acknowledges that it can bear the economic and financial risk of its investment for an indefinite period, and has such knowledge and experience in financial or business matters that it is capable of evaluating the merits and risks of the investment in the Warrant and the Warrant Shares. The Holder has had an opportunity to ask questions and receive answers from the Company regarding the terms and conditions of the offering of the Warrant and the business, properties, prospects and financial condition of the Company.
10.      Warrant Register . The Company shall keep and properly maintain at its principal executive offices books for the registration of the Warrant and any transfers thereof. The Company may deem and treat the Person in whose name the Warrant is registered on such register as the Holder thereof for all purposes, and the Company shall not be affected by any notice to the contrary, except any assignment, division, combination or other transfer of the Warrant effected in accordance with the provisions of this Warrant.
11.      Notices . Any and all notices or other communications or deliveries hereunder (including without limitation any Exercise Notice) shall be in writing and shall be mailed by certified mail, return receipt requested, or by a nationally recognized courier service or delivered (in person or by facsimile), against receipt to the party to whom such notice or other communication is to be given. Any notice or other communication given by means permitted by this Section 11 shall be deemed given at the time of receipt thereof. The address for such notices or communications shall be as set forth below (or at such other address for a party as shall be specified in a notice given in accordance with this Section 11 ):

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If to the Company:
Agenus Inc.
3 Forbes Road
Lexington, MA 02421
Facsimile: 781-674-4200
Attention: Vice-President of Finance

If to the Company:

Agenus Inc.
3 Forbes Road
Lexington, MA 02421
Facsimile: 781-674-4200
Attention: Legal Department

with a copy to:
Choate, Hall & Stewart LLP
Two International Place
Boston, MA 02110
Attention: Gerald E. Quirk

If to the Holder:

[ADDRESS]
Facsimile:
Attention:

with a copy to:
[ADDRESS]
Facsimile:
Attention:


12.      Cumulative Remedies . Except to the extent expressly provided in Section 6 to the contrary, the rights and remedies provided in this Warrant are cumulative and are not exclusive of, and are in addition to and not in substitution for, any other rights or remedies available at law, in equity or otherwise.
13.      Equitable Relief . Each of the Company and the Holder acknowledges that a breach or threatened breach by such party of any of its obligations under this Warrant would give rise to irreparable harm to the other party hereto for which monetary damages would not be an adequate remedy and hereby agrees that in the event of a breach or a threatened breach by such party of any such obligations, the other party hereto shall, in addition to any and all other rights and remedies that may be available to it in respect of such breach, be entitled to equitable relief, including a restraining order, an injunction, specific performance and any other relief that may be available from a court of competent jurisdiction.
14.      Entire Agreement . This Warrant, together with the Purchase Agreement, constitutes the sole and entire agreement of the parties to this Warrant with respect to the subject matter contained herein, and supersedes all prior and contemporaneous understandings and agreements, both written and oral, with respect to such subject matter. In the event of any inconsistency between the statements in the body of this Warrant and the Purchase Agreement, the statements in the body of this Warrant shall control.

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15.      Successor and Assigns. This Warrant and the rights evidenced hereby shall be binding upon and shall inure to the benefit of the parties hereto and the successors of the Company and the successors and permitted assigns of the Holder. Such successors and/or permitted assigns of the Holder shall be deemed to be a Holder for all purposes hereunder.
16.      No Third-Party Beneficiaries . This Warrant is for the sole benefit of the Company and the Holder and their respective successors and, in the case of the Holder, permitted assigns and nothing herein, express or implied, is intended to or shall confer upon any other Person any legal or equitable right, benefit or remedy of any nature whatsoever, under or by reason of this Warrant.
17.      Headings . The headings in this Warrant are for reference only and shall not affect the interpretation of this Warrant.
18.      Amendment and Modification; Waiver . To the extent that (i) the terms of this Warrant require the Company to obtain the consent or approval of the Purchasers (as defined in the Purchase Agreement or (ii) the Company seeks an amendment to or modification or waiver of any of the terms of this Warrant, such Approval (as defined in the Purchase Agreement) shall be made by the Required Purchasers (as defined in the Purchase Agreement). Notwithstanding the foregoing, the Holder may, in its sole discretion, agree to any consent, approval, action, termination, amendment or waiver that solely effects the rights of the Holder under this Warrant. No failure or delay by any party in exercising any power or right arising from this Warrant shall operate as a waiver thereof nor shall any single or partial exercise of any such right or power, or any abandonment or discontinuance of steps to enforce such a right or power, preclude any other or further exercise thereof or the exercise of any other right or power. The rights and remedies of each party under this Warrant are cumulative and are not exclusive of any rights or remedies that they would otherwise have.
19.      Severability . If any term or provision of this Warrant is invalid, illegal or unenforceable in any jurisdiction, such invalidity, illegality or unenforceability shall not affect any other term or provision of this Warrant or invalidate or render unenforceable such term or provision in any other jurisdiction.
20.      Governing Law . THIS WARRANT AND THE RIGHTS AND OBLIGATIONS OF THE PARTIES HEREUNDER SHALL BE CONSTRUED IN ACCORDANCE WITH AND GOVERNED BY THE LAWS OF THE STATE OF NEW YORK.
21.      Submission to Jurisdiction . ANY LEGAL ACTION OR PROCEEDING ARISING UNDER THIS WARRANT OR IN ANY WAY CONNECTED WITH OR RELATED OR INCIDENTAL TO THE DEALINGS OF THE COMPANY OR THE HOLDER OR ANY OF THEM WITH RESPECT TO THIS WARRANT, IN EACH CASE WHETHER NOW EXISTING OR HEREAFTER ARISING, SHALL BE BROUGHT IN THE COURTS OF THE STATE OF NEW YORK SITTING IN NEW YORK COUNTY (BOROUGH OF MANHATTAN) OR OF THE UNITED STATES FOR THE SOUTHERN DISTRICT OF SUCH STATE. EACH OF THE COMPANY AND THE HOLDER CONSENTS, FOR ITSELF AND IN RESPECT OF ITS PROPERTY, TO THE EXCLUSIVE JURISDICTION OF THOSE

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COURTS AND AGREES THAT IT WILL NOT COMMENCE OR SUPPORT ANY SUCH ACTION OR PROCEEDING IN ANOTHER JURISDICTION. THE COMPANY AND THE HOLDER IRREVOCABLY WAIVE ANY OBJECTION, INCLUDING ANY OBJECTION TO THE LAYING OF VENUE OR BASED ON THE GROUNDS OF FORUM NON CONVENIENS , WHICH IT MAY NOW OR HEREAFTER HAVE TO THE BRINGING OF ANY ACTION OR PROCEEDING IN SUCH JURISDICTION IN RESPECT THIS WARRANT OR OTHER DOCUMENT RELATED THERETO. EACH OF THE COMPANY AND THE HOLDER IRREVOCABLY CONSENTS TO SERVICE OF PROCESS IN ANY ACTION OR PROCEEDING ARISING OUT OF OR RELATING TO THIS WARRANT IN THE MANNER PROVIDED FOR NOTICES (OTHER THAN FACSIMILE) IN SECTION 11 . NOTHING IN THIS WARRANT WILL AFFECT THE RIGHT OF THE COMPANY OR THE HOLDER TO SERVE PROCESS IN ANY OTHER MANNER PERMITTED BY APPLICABLE LAW.
22.      Waiver of Jury Trial . EACH OF THE COMPANY AND THE HOLDER HEREBY WAIVES, TO THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW, ANY RIGHT IT MAY HAVE TO A TRIAL BY JURY IN RESPECT OF ANY LITIGATION DIRECTLY OR INDIRECTLY ARISING OUT OF, UNDER OR IN CONNECTION WITH THIS WARRANT. EACH OF THE COMPANY AND THE HOLDER (A) CERTIFIES THAT NO REPRESENTATIVE, AGENT OR ATTORNEY OF THE OTHER HAS REPRESENTED, EXPRESSLY OR OTHERWISE, THAT SUCH OTHER PARTY WOULD NOT, IN THE EVENT OF LITIGATION, SEEK TO ENFORCE THE FOREGOING WAIVER AND (B) ACKNOWLEDGES THAT IT AND THE OTHER PARTY HAVE BEEN INDUCED TO ENTER INTO THIS WARRANT, BY, AMONG OTHER THINGS, THE MUTUAL WAIVERS AND CERTIFICATIONS IN THIS SECTION 22 .
23.      Counterparts . This Warrant may be executed in counterparts, each of which shall be deemed an original, but all of which together shall be deemed to be one and the same agreement. A signed copy of this Warrant delivered by facsimile, e-mail or other means of electronic transmission shall be deemed to have the same legal effect as delivery of an original signed copy of this Warrant.
24.      No Strict Construction . This Warrant shall be construed without regard to any presumption or rule requiring construction or interpretation against the party drafting an instrument or causing any instrument to be drafted.
[SIGNATURE PAGE FOLLOWS]


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IN WITNESS WHEREOF, the Company has duly executed this Warrant on the Original Issue Date.
AGENUS INC.

By:                         
Name:
Title:

[Signature Page to Warrant]


Exhibit A

FORM OF EXERCISE NOTICE

(To be executed by the Holder to exercise the right to purchase shares of Common Stock under the foregoing Warrant)
To:    Agenus Inc.
The undersigned is the Holder of Warrant No. [    ] (the “Warrant”) issued by Agenus Inc., a Delaware corporation (the “Company”). Capitalized terms used herein and not otherwise defined have the respective meanings set forth in the Warrant.
1.
The Warrant is currently exercisable to purchase a total of ________ Warrant Shares.
2.
The undersigned Holder hereby exercises its right to purchase _______ Warrant Shares pursuant to the Warrant.
3.
[The Holder shall pay the sum of $_______ to the Company in accordance with the terms of the Warrant.]/ [The Holder elects for a cashless exercise in accordance with the terms of the Warrant.]
4.
Pursuant to this exercise, the Company shall deliver to the Holder _____ Warrant Shares in accordance with the terms of the Warrant.
5.
Following this exercise, the Warrant shall be exercisable to purchase a total of _______ Warrant Shares.
Dated:             
Name of Holder:

(Print)                   

By:                   

Title:                   

(Signature must conform in all respects to name of Holder as specified on face of the Warrant)





Exhibit B

FORM OF ASSIGNMENT

(to be completed and signed only upon transfer of Warrant)



FOR VALUE RECEIVED, the undersigned hereby sells, assigns and transfers unto ___________________________ the right represented by the within Warrant to purchase _____________ shares of Common Stock of Agenus Inc. to which the within warrant relates and appoints ______________ attorney to transfer said right on the books of Agenus Inc. with full power of substitution in the premises.
Dated:             
                  
(Signature must conform in all respects to name of Holder as specified on face of the Warrant)


Address of Transferee:

               

               

               


In the presence of:

               
 





Exhibit 31.1
Certification Pursuant to Rules 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934, as amended
I, Garo H. Armen, certify that:
1.
I have reviewed this Quarterly Report on Form 10-Q of Agenus Inc.;
2.
Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;
3.
Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the Registrant as of, and for, the periods presented in this report;
4.
The Registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the Registrant and have:
a.
designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the Registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;
b.
designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with U.S. generally accepted accounting principles;
c.
evaluated the effectiveness of the Registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and
d.
disclosed in this report any change in the Registrant’s internal control over financial reporting that occurred during the Registrant’s most recent fiscal quarter (the Registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the Registrant’s internal control over financial reporting; and
5.
The Registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the Registrant’s auditors and the audit committee of the Registrant’s board of directors (or persons performing the equivalent function):
a.
all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the Registrant’s ability to record, process, summarize and report financial information; and
b.
any fraud, whether or not material, that involves management or other employees who have a significant role in the Registrant’s internal control over financial reporting.


 
Date:
May 1, 2015
 
/s/    G ARO  H. A RMEN , P H .D.        
 
 
 
Garo H. Armen, Ph.D.
 
 
 
Chief Executive Officer and Principal Executive Officer




Exhibit 31.2
Certification Pursuant to Rules 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934, as amended
I, Christine M. Klaskin, certify that:
1.
I have reviewed this Quarterly Report on Form 10-Q of Agenus Inc.;
2.
Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;
3.
Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the Registrant as of, and for, the periods presented in this report;
4.
The Registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the Registrant and have:
a.
designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the Registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;
b.
designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with U.S. generally accepted accounting principles;
c.
evaluated the effectiveness of the Registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and
d.
disclosed in this report any change in the Registrant’s internal control over financial reporting that occurred during the Registrant’s most recent fiscal quarter (the Registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the Registrant’s internal control over financial reporting; and
5.
The Registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the Registrant’s auditors and the audit committee of the Registrant’s board of directors (or persons performing the equivalent function):
a.
all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the Registrant’s ability to record, process, summarize and report financial information; and
b.
any fraud, whether or not material, that involves management or other employees who have a significant role in the Registrant’s internal control over financial reporting.

 
Date:
May 1, 2015
 
    /s/ CHRISTINE M. KLASKIN
 
 
 
Christine M. Klaskin
 
 
 
VP, Finance and Principal Financial Officer




Exhibit 32.1
Certification
Pursuant to 18 U.S.C. Section 1350,
As Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
In connection with the Quarterly Report on Form 10-Q of Agenus Inc. (the “Company”) for the quarterly period ended March 31, 2015 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), each of the undersigned to his/her knowledge hereby certifies, pursuant to 18 U.S.C. Section 1350, that:
(i)
The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and
(ii)
The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.
 
/s/     GARO H. ARMEN, Ph.D.        
 
Garo H. Armen, Ph.d.
 
Chief Executive Officer and Principal Executive Officer
 
 
 
/s/     CHRISTINE M. KLASKIN        
 
Christine M. Klaskin
 
VP, Finance and Principal Financial Officer
Date: May 1, 2015
A signed original of this written statement required by Section 906 has been provided to the Company. and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request.
The foregoing certification is being furnished to the Securities and Exchange Commission as an exhibit to the Report and should not be considered filed as part of the Report.