UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM 8-K
CURRENT REPORT
Pursuant to Section 13 or 15(d)
of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): March 10, 2020

Castle Biosciences, Inc.
(Exact name of registrant as specified in its charter) 
         
Delaware   001-38984   77-0701774
(state or other jurisdiction
of incorporation)
  (Commission
File Number)
  (I.R.S. Employer
Identification No.)

820 S. Friendswood Drive, Suite 201
Friendswood, Texas
77546
(Address of principal executive offices) (Zip Code)

Registrant’s telephone number, including area code: (866) 788-9007

(Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: 

¨ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
¨ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) 
¨ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) 
¨ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) 
 
Securities registered pursuant to Section 12(b) of the Act: 
Title of each class Trading Symbol(s)   Name of each exchange on which registered
Common Stock, $0.001 par value per share CSTL   The Nasdaq Global Market

Indicate by check mark whether the registrant is an emerging growth company as defined in as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b–2 of the Securities Exchange Act of 1934 (§ 240.12b–2 of this chapter).
Emerging growth company x
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ¨ 





Item 2.02 Results of Operations and Financial Condition.

On March 10, 2020, Castle Biosciences, Inc. (the “Company”) issued a press release announcing its financial results for the fourth quarter of 2019 and for the year ended December 31, 2019. A copy of the press release is attached hereto as Exhibit 99.1.

The information contained or incorporated in this Current Report on Form 8-K, including Exhibit 99.1, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed to be incorporated by reference into any filing under the Exchange Act or the Securities Act of 1933, as amended (the “Securities Act”), except as expressly set forth by specific reference in such filing to this Current Report on Form 8-K.

Item 7.01 Regulation FD Disclosure.

On March 10, 2020, the Company made available via its website, www.castlebiosciences.com, a slide presentation for use in meetings with investors, analysts and others. A copy of the slide presentation is attached hereto as Exhibit 99.2.

The information contained or incorporated in this Current Report on Form 8-K, including Exhibit 99.2, shall not be deemed “filed” for purposes of Section 18 of the Exchange Act, or otherwise subject to the liabilities of that section, nor shall it be deemed to be incorporated by reference into any filing under the Exchange Act or the Securities Act, except as expressly set forth by specific reference in such filing to this Current Report on Form 8-K.

By filing this Current Report on Form 8-K, including Exhibit 99.2 attached hereto, and furnishing this information, the Company makes no admission as to the materiality of such information. The information contained in this report is intended to be considered in the context of the Company’s filings with the Securities and Exchange Commission (“SEC”) and other public announcements that the Company makes, by press release or otherwise, from time to time. The Company undertakes no duty or obligation to publicly update or revise the information contained in this report, although it may do so from time to time as its management believes is appropriate. Any such updating may be made through the filing of other reports or documents with the SEC, through press releases or through other public disclosure.

Item 9.01 Financial Statements and Exhibits.
(d) Exhibits.
Exhibit
Number Description
99.1
99.2






SIGNATURES
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

CASTLE BIOSCIENCES, INC.
By: /s/ Frank Stokes
Frank Stokes
Chief Financial Officer
Date: March 10, 2020
 



Exhibit 99.1
CSTLLOGO011.JPG
Castle Biosciences Announces Fourth Quarter and Full-Year 2019 Results

Q4 2019 recognized revenues of $17.6 million, compared to $11.4 million in Q4 2018
Q4 2019 adjusted revenues of $17.6 million, compared to $6.2 million in Q4 2018
Full-year 2019 revenues of $51.9 million, compared to $22.8 million in 2018
Full-year 2019 gross margin was 86%
2020 revenue guidance of $61-64 million
Conference call and webcast today at 4:30 p.m. ET

FRIENDSWOOD, TEXAS- March 10, 2020--Castle Biosciences, Inc. (Nasdaq: CSTL), a skin cancer diagnostics company providing personalized genomic information to improve cancer treatment decisions, today announced its financial results for the fourth quarter and twelve months ended December 31, 2019.

“The Castle Biosciences’ team delivered very strong results in 2019, with growth in test report volume and revenue, continued evidence development for DecisionDx®-Melanoma and DecisionDx®-UM tests and advancement of our pipeline products,” said Derek Maetzold, president and chief executive officer of Castle Biosciences. “Our team also delivered on two commercial expansions, with all 32 outside sales territories filled as of December 2019, establishing a solid base for execution of our 2020 plan.

“We presented data on our late-stage pipeline test, DecisionDx®-SCC, for use in patients diagnosed with high-risk cutaneous squamous cell carcinoma (SCC), as defined by the National Comprehensive Cancer Network (NCCN). The data demonstrated the ability of the test to stratify patients presenting as high-risk into those who are truly high-risk patients and those who are lower-risk patients. DecisionDx-SCC is designed to aid physicians in the development of appropriate, risk-aligned treatment plans. Our DecisionDx-SCC test remains on track for expected commercial launch in the second half of 2020.

“Additionally, development of our third skin cancer product, for use in patients with a suspicious pigmented lesion, remains on track for expected commercial launch in the second half of 2020. We estimate that combined, our three skin cancer products, DecisionDx-Melanoma, DecisionDx-SCC and our test for suspicious pigmented lesions, will have a total addressable U.S. market of approximately $2.0 billion.”

Fourth Quarter Ended December 31, 2019, Financial Highlights
Revenue was $17.6 million in the fourth quarter of 2019, compared to $11.4 million in the fourth quarter of 2018.
Adjusted revenue was $17.6 million in the fourth quarter of 2019, compared to $6.2 million in the fourth quarter of 2018.
Delivered 4,480 DecisionDx-Melanoma test reports in the fourth quarter of 2019, which represents 37% growth compared to the 3,270 reports delivered during the fourth quarter of 2018.
Delivered 434 DecisionDx-UM test reports in the fourth quarter of 2019, which represents 13% growth compared to 385 reports during the fourth quarter of 2018.
Gross margin in the fourth quarter of 2019 was 89%.
Operating cash flow was $4.5 million in the fourth quarter of 2019, compared to $(3.2) million in the fourth quarter of 2018.




Twelve Months Ended December 31, 2019, Financial Highlights
Revenue was $51.9 million for the full year 2019, compared to $22.8 million in 2018.
Delivered 15,529 DecisionDx-Melanoma test reports for the full year 2019, compared to 12,032 reports during the full year 2018, representing growth of 29%. In 2019, new ordering clinicians for DecisionDx-Melanoma increased 24% compared to 2018. Additionally, total ordering clinicians in 2019 for DecisionDx-Melanoma increased 32% to 3,927, year-over-year.
Delivered 1,526 DecisionDx-UM test reports for the full year 2019, compared to 1,413 reports during the full year 2018, representing growth of 8%.
Gross margin for the full year 2019 was 86%.
Operating cash flow was $7.0 million for the full year 2019, compared to $(12.3) million in 2018.

Cash and Cash Equivalents

As of December 31, 2019, the Company’s cash and cash equivalents totaled $99 million, and the outstanding principal balance on the Company’s bank term loan was $26.7 million.

2020 Revenue Guidance

Castle Biosciences anticipates generating $61-64 million in revenue in 2020.

Supplemental Revenue Information

Affecting the year-over-year comparability of our revenues were (a) the issuance of the Medicare Local Coverage Determination (LCD) for our DecisionDx-Melanoma test, effective December 3, 2018, and (b) confirmation of the Medicare Contractor rate for DecisionDx-Melanoma. As a result of timing of these two elements, all 2018 Medicare claims covered under the LCD were recognized as revenue in the fourth quarter of 2018. Medicare revenues for DecisionDx-Melanoma associated with test reports delivered in the first three quarters of 2018, but not recorded until the fourth quarter of 2018, were $5.2 million. Also, included in revenues for the quarters ended December 31, 2019 and 2018, were positive (negative) revenue adjustments related to tests delivered in prior periods of $4.3 million and $(1.2) million, respectively. For the twelve months ended December 31, 2019, and 2018, these amounts totaled $2.5 million and $0.3 million, respectively.

Fourth Quarter Business and Clinical Evidence Updates

The Company more than doubled the number of commercial and medical affairs personnel between December 2018 and December 2019. The most recent expansion occurred in December 2019, with an increase in the number of outside sales territories to 32 from 23, along with commensurate increases in other commercial and medical affairs support roles. The Company previously expanded the number of outside sales territories to 23 from 14 in February 2019.
Results from a study designed to perform a systematic review of the literature and establish the level of evidence for the Company’s DecisionDx-Melanoma gene expression profile test were published in the December 2019 issue of the American Journal of Clinical Dermatology. The results suggest that the DecisionDx-Melanoma test achieves a higher level of evidence than required by major organizations that publish guidelines on melanoma management. The evaluation of seven development and validation studies led the authors to



classify DecisionDx-Melanoma as level I/II, 1-3B and IIA according to the American Joint Committee on Cancer (AJCC), National Comprehensive Cancer Network (NCCN) and American Academy of Dermatology (AAD) criteria, respectively, which are higher than the official unrated status conferred by the AJCC and NCCN and the II/IIIC rating designated by the AAD in the latest version of their melanoma guidelines.
The NCCN Guidelines for Cutaneous Melanoma were updated in the fourth quarter, with a positive shift in the inclusion language indicating that the DecisionDx-Melanoma test may provide information that is an adjunct to AJCC staging, with a category 2A level of evidence recommendation. This level of evidence is consistent with the systematic review study published in December 2019 (see American Journal of Clinical Dermatology publication noted earlier).
The Company received notification that the American Medical Association’s (AMA) Current Procedural Terminology (CPT) Editorial Panel accepted Castle’s application for a Category I Multianalyte Assays with Algorithmic Analyses (MAAA) CPT code for its DecisionDx-Melanoma test. The CPT Editorial Panel is an independent group of expert volunteers representing various sectors of the health care industry. Its role is to ensure that code changes undergo evidence-based review and meet specific criteria. The code will be effective on January 1, 2021. With this acceptance, both of the Company’s proprietary MAAA tests, DecisionDx-UM and DecisionDx-Melanoma, have met the criteria required for a Category I MAAA CPT code.
Data from a second, multi-center, prospectively tested patient cohort study of 1,166 patients supporting clinical use of the DecisionDx-Melanoma test to inform discussions and recommendations regarding sentinel lymph node biopsy (SLNB), as well as data from a separate multi-center prospective outcomes study were presented during the 16th International Congress of the Society for Melanoma Research.
In the expanded, multi-center prospectively tested patient cohort study:
In SLNB-assessed patients 65 years of age or older with T1-T2 tumors and a Class 1A test result, SLN positivity was 2.7%, significantly less than patients with a Class 1B-2A (p<0.01) or Class 2B result (p<0.0001), and below the 5% threshold at which guidelines do not recommend the procedure.
In the multi-center prospective outcomes study:
In a prospective cohort with median follow-up of 3.2 years for patients without an event, Class 1A patients with T1-T2 melanoma, at three years, had overall survival of 99.4%, distant metastasis-free survival of 98.7% and recurrence-free survival of 96.6%, adding further support that this population can safely avoid the SLNB surgical procedure.
DecisionDx-SCC, the Company’s late stage pipeline product expected to be commercially available in the second half of 2020, is designed to predict a low risk of metastasis in patients with cutaneous squamous cell carcinoma (SCC), who are identified as high risk by traditional clinicopathologic staging criteria. Results of the clinical validation study (n=321) for DecisionDx-SCC were presented in October 2019 at the American Society for Dermatologic Surgery (ASDS) Annual Meeting. The development goal for DecisionDx-SCC was to enable a clinician to consider de-escalating treatment plans in patients with one or more high-risk clinical or pathologic features who are at low biological risk of metastasis, and with the remaining patients having a significantly higher risk of metastasis, enabling more accurate implementation of risk directed treatment plans.




Recent Developments

In January 2020, the Company presented data supporting a framework for integration of DecisionDx-SCC into risk-appropriate management of high-risk cutaneous SCC patients (as defined by NCCN) at the 2020 Winter Clinical Dermatology Conference. The study found that integration of DecisionDx-SCC for NCCN-defined high-risk cutaneous SCC patients with T staging identified a group of patients (Class 1, T1-T2) with a 7.5% rate of metastasis, which approaches that of the general cutaneous SCC patient population. A low intensity management strategy, within the broad NCCN high-risk guidelines, could spare this patient group unnecessary adjuvant procedures and potential adverse effects.

Earlier this March, the first U.S. Patent related to the Company’s DecisionDx-Melanoma test was issued (Patent No. 10,577,660) by the United States Patent and Trademark Office (USPTO). This patent brings the total number of issued or allowed patents related to DecisionDx-Melanoma to 10 and covers methods of treating cutaneous melanoma in patients having high-risk cutaneous melanoma tumors.

Conference Call and Webcast Details
Castle Biosciences will hold a conference call on Tuesday, March 10, 2020, at 4:30 p.m. Eastern time to discuss its fourth quarter and full-year 2019 results and provide a corporate update.

A live webcast of the conference call can be accessed here: https://edge.media-server.com/mmc/p/z5thjfrt or via the webcast link on the Investor Relations page of the Company’s website (www.castlebiosciences.com). Please access the webcast at least 10 minutes before the conference call start time. An archive of the webcast will be available on the Company’s website until April 1, 2020.

To access the live conference call via phone, please dial 877-282-2581 from the United States and Canada, or +1 470-495-9479 internationally, at least 10 minutes prior to the start of the call, using the conference ID 5836318.

There will be a brief Question & Answer session following management commentary.

Use of Non-GAAP Financial Measures (UNAUDITED)

In this release, we use the metric of Adjusted Revenue, which is a non-GAAP financial measure and is not calculated in accordance with generally acceptance accounting principles in the United States (GAAP). This non-GAAP financial measure reflects adjustments to total revenue associated with certain test reports delivered in one reporting period that were not recognizable until a later reporting period because all the criteria for revenue recognition were not met under GAAP. Specifically, we did not have a Medicare LCD in place for our DecisionDx-Melanoma test until the fourth quarter of 2018. When issued, the LCD also provided coverage for payment of claims beginning in February 2018. Therefore, all the revenue covered by the LCD associated with tests delivered in the first through third quarters of 2018 were not recognized in our reported GAAP revenue until the fourth quarter of 2018. For the fourth quarter of 2018, Adjusted Revenue excludes revenue that was recognized during such quarter that relate to test reports covered by the LCD that were delivered in the first through third quarters of 2018. Since the LCD was in effect for all of 2019, Adjusted Revenue for the fourth quarter of 2019 is the same as revenue calculated in accordance with GAAP.




We use Adjusted Revenue internally because we believe this metric provides useful supplemental information in understanding changes in our year-over-year financial performance by reflecting DecisionDx-Melanoma Medicare LCD revenue in the periods the test reports were delivered. We believe this metric is also useful to investors as a supplement to GAAP measures in analyzing the performance of our business. However, this non-GAAP financial measure may be different from non-GAAP financial measures used by other companies, even when the same or similarly titled terms are used to identify such measures, limiting their usefulness for comparative purposes. This non-GAAP financial measure is not meant to be a substitute for revenue reported in accordance with GAAP and should be considered in conjunction with our financial information presented on a GAAP basis. Accordingly, investors should not place undue reliance on non-GAAP financial measures. Reconciliations of this non-GAAP financial measure to the most directly comparable GAAP financial measure are presented in the table at the end of this release.

About Castle Biosciences, Inc.
Castle Biosciences (Nasdaq: CSTL) is a commercial-stage dermatologic cancer company focused on providing physicians and their patients with personalized, clinically actionable genomic information to make more accurate treatment decisions. The Company currently offers tests for patients with cutaneous melanoma (DecisionDx®-Melanoma, DecisionDx®-CMSeq; www.SkinMelanoma.com) and uveal melanoma (DecisionDx®-UM, DecisionDx®-PRAME and DecisionDx®- UMSeq; www.MyUvealMelanoma.com), with products in development for other underserved cancers, the two most advanced of which are focused on patients with cutaneous squamous cell carcinoma, and patients who have a difficult-to-diagnose pigmented lesion. Castle Biosciences is based in Friendswood, Texas (Houston), and has laboratory operations in Phoenix, Arizona. For more information, visit www.CastleBiosciences.com.

Forward-Looking Statements

The information in this press release contains forward-looking statements and information within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended, which are subject to the “safe harbor” created by those sections. These forward-looking statements include, but are not limited to, statements concerning the expected commercial availability of our pipeline products, estimated total addressable market attributable to these pipeline products, our plans for commercial expansion, including anticipated number of sales territories and related increased hiring activity, the impact of our tests, including DecisionDx-Melanoma, on patient treatment plans, our revenue expectations for 2020, our prospects and plans and the objectives of management. The words “anticipates,” “believes,” “estimates,” “expects,” “intends,” “may,” “plans,” “projects,” “will,” “would” and similar expressions are intended to identify forward-looking statements, although not all forward-looking statements contain these identifying words. We may not actually achieve the plans, intentions, or expectations disclosed in our forward-looking statements and you should not place undue reliance on our forward-looking statements. Actual results or events could differ materially from the plans, intentions and expectations disclosed in the forward-looking statements that we make. These forward-looking statements involve risks and uncertainties that could cause our actual results to differ materially from those in the forward-looking statements, including, without limitation, the timing and amount of revenue we are able to recognize in a given fiscal period, unexpected delays in planned launch of our pipeline products, the level and availability of reimbursement for our products, our ability to manage our anticipated growth and the risks set forth in our final prospectus filed with the SEC on July 26, 2019 relating to our Registration Statements on Form S-1 (File Nos. 333-232369 and 333-232796) and our Quarterly Report on Form 10-Q for the quarter ended September 30,



2019, filed with the SEC on November 12, 2019, and in our other filings with the SEC. The forward-looking statements are applicable only as of the date on which they are made, and we do not assume any obligation to update any forward-looking statements, except as may be required by law.


Investor and Media Contact:
Camilla Zuckero
+1 832-835-5158
czuckero@castlebiosciences.com




CASTLE BIOSCIENCES, INC.
CONDENSED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS)
(in thousands, except per share data)

Three Months Ended
December 31,
Twelve Months Ended
December 31,
2019 2018 2019 2018
(unaudited)   (unaudited)  
NET REVENUES $ 17,635    $ 11,436    $ 51,865    $ 22,786   
COST OF SALES 2,011    1,366    7,310    5,297   
Gross margin 15,624    10,070    44,555    17,489   
OPERATING EXPENSES
Research and development 3,159    1,138    7,385    4,854   
Selling, general and administrative 9,852    4,165    29,842    16,471   
Total operating expenses 13,011    5,303    37,227    21,325   
Operating income (loss) 2,613    4,767    7,328    (3,836)  
Interest income 280      312    24   
Interest expense (766)   (650)   (4,571)   (2,274)  
Gain on extinguishment of debt —    —    5,213    —   
Other expense, net —    (243)   (2,933)   (272)  
Income (loss) before income taxes 2,127    3,877    5,349    (6,358)  
Income tax expense 72      72     
Net income (loss) and comprehensive income (loss) 2,055    3,868    5,277    (6,367)  
Convertible preferred stock cumulative dividends —    949    2,156    3,577   
Accretion of redeemable convertible preferred stock to redemption value —    57    130    219   
Net income (loss) and comprehensive income (loss) attributable to common stockholders $ 2,055    $ 2,862    $ 2,991    $ (10,163)  
Earnings (loss) per share attributable to common stockholders:
Basic $ 0.12    $ 1.49    $ 0.35    $ (5.33)  
Diluted $ 0.11    $ 0.38    $ (0.21)   $ (5.33)  
Weighted-average shares outstanding:
Basic 17,295    1,916    8,584    1,906   
Diluted 18,600    10,301    8,658    1,906   




CASTLE BIOSCIENCES, INC.
CONDENSED BALANCE SHEETS
(in thousands)
December 31,
2019 2018
ASSETS    
Current Assets    
Cash and cash equivalents $ 98,845    $ 4,479   
Accounts receivable, net 14,648    12,090   
Inventory 1,237    882   
Prepaid expenses and other current assets 1,951    675   
Total current assets 116,681    18,126   
Long-term accounts receivable, net 870    2,532   
Property and equipment, net 2,060    1,529   
Intangible assets, net —     
Other assets – long-term 135    214   
Total assets $ 119,746    $ 22,405   
LIABILITIES, CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS’ EQUITY (DEFICIT)
Current Liabilities
Accounts payable $ 1,865    $ 1,451   
Accrued compensation 5,779    4,571   
Other accrued liabilities 1,812    715   
Current portion of long-term debt 5,833    —   
Total current liabilities 15,289    6,737   
Long-term debt 19,289    24,500   
Preferred stock warrant liability —    1,194   
Deferred rent liability 55    44   
Total liabilities 34,633    32,475   
Convertible Preferred Stock
Convertible preferred stock Series C
—    1,501   
Redeemable convertible preferred stock Series A, B, D, E-1, E-2, E-2A, E-3 and F
—    44,995   
Stockholders’ Equity (Deficit)
Common stock
17     
Additional paid-in capital 137,308    921   
Accumulated deficit (52,212)   (57,489)  
Total stockholders’ equity (deficit) 85,113    (56,566)  
Total liabilities, convertible preferred stock and stockholders’ equity (deficit) $ 119,746    $ 22,405   






CASTLE BIOSCIENCES, INC.
CONDENSED STATEMENTS OF CASH FLOWS
(in thousands)
Twelve Months Ended
December 31,
2019 2018
OPERATING ACTIVITIES    
Net income (loss) $ 5,277    $ (6,367)  
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation 354    287   
Stock compensation expense 1,249    294   
Amortization of intangibles   36   
Amortization of debt discounts and issuance costs 1,925    566   
Other non-cash interest 442    —   
Gain on extinguishment of debt (5,213)   —   
Change in fair value of preferred stock warrant liability 619    272   
Change in fair value of embedded derivative 237    —   
Change in fair value of convertible promissory note accounted for under the fair value option 2,077    —   
Other —    (24)  
Change in operating assets and liabilities:
Accounts receivable (896)   (8,408)  
Prepaid expenses and other current assets (1,276)   (160)  
Inventory (355)   (578)  
Other assets (85)   14   
Accounts payable 557    197   
Accrued compensation 1,208    1,347   
Other accrued liabilities 879    201   
Deferred rent liability 12    28   
Net cash provided by (used in) operating activities 7,015    (12,295)  
INVESTING ACTIVITIES
Purchases of property and equipment (937)   (277)  
Net cash used in investing activities (937)   (277)  
FINANCING ACTIVITIES
Proceeds from initial public offering of common stock, net of underwriting discounts, commissions and issuance costs 65,931    —   
Proceeds from issuance of preferred stock and preferred stock warrants (including exercised warrants) 49    10,383   
Proceeds from issuance of term debt and preferred stock warrants, net of issuance costs —    4,418   
Proceeds from issuance of convertible promissory notes, net of issuance costs 11,695    —   
Proceeds from issuance of convertible promissory note and common stock warrant, net of issuance costs 9,236    —   
Proceeds from issuance of term debt, net of issuance costs 1,776    —   
Proceeds from line of credit —    1,000   
Repayments on line of credit (1,791)   —   
Proceeds from exercise of common stock options 1,174    38   
Proceeds from contributions to the employee stock purchase plan 218    —   
Net cash provided by financing activities 88,288    15,839   
NET CHANGE IN CASH AND CASH EQUIVALENTS 94,366    3,267   
Beginning of period 4,479    1,212   
End of period $ 98,845    $ 4,479   





CASTLE BIOSCIENCES, INC.
Reconciliation of Non-GAAP Financial Measures (UNAUDITED)
The table below presents the reconciliation of adjusted revenue, which is a non-GAAP measure. See "Use of Non-GAAP Financial Measures (UNAUDITED)" above for further information regarding the Company's use of non-GAAP financial measures.


Three Months Ended
December 31,
2019 2018
(in thousands)
Adjusted Revenues
Adjusted Revenues (Non-GAAP) $ 17,635    $ 6,245   
DecisionDx-Melanoma Medicare revenue associated with test reports delivered prior to 4Q18 not recognizable until 4Q18 —    5,191   
Net Revenues (GAAP) $ 17,635    $ 11,436   


The Skin Cancer Diagnostics Company COMPANY PRESENTATION March 10, 2020 NASDAQ:CSTL


 
DISCLAIMERS › Forward-Looking Statements The information in this presentation contains forward-looking statements and information within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended, which are subject to the “safe harbor” created by those sections. These forward-looking statements include, but are not limited to, statements concerning the anticipated milestones, including expected commercial availability of our pipeline products, estimated total addressable market attributable to our pipeline products, and our plans for commercial expansion, including anticipated number of sales territories. The words “anticipates,” “believes,” “estimates,” “expects,” “intends,” “may,” “plans,” “projects,” “will,” “would” and similar expressions are intended to identify forward-looking statements, although not all forward-looking statements contain these identifying words. We may not actually achieve the plans, intentions, or expectations disclosed in our forward-looking statements and you should not place undue reliance on our forward- looking statements. Actual results or events could differ materially from the plans, intentions and expectations disclosed in the forward-looking statements that we make. These forward-looking statements involve risks and uncertainties that could cause our actual results to differ materially from those in the forward- looking statements, including, without limitation, the risks set forth in our final prospectus filed with the SEC on July 26, 2019 relating to our Registration Statements on Form S-1 (File Nos. 333-232369 and 333-232796) and our Annual Report on Form 10-K for the year ended December 31, 2019, and in our other filings with the SEC. The forward-looking statements are applicable only as of the date on which they are made, and we do not assume any obligation to update any forward-looking statements, except as may be required by law. DecisionDx, DecisionDx-UM, DecisionDx-Melanoma, and the Castle Biosciences logo are the registered trademarks of Castle Biosciences, Inc. This presentation may also contain trademarks and trade names that are the property of their respective owners. 2


 
CASTLE BIOSCIENCES Improving Health Outcomes Of Patients With Skin Cancer Through Innovative, Clinically Actionable, Cost-Effective Diagnostics › INNOVATIVE PRODUCTS › Two commercialized products that improve treatment decisions for patients with melanoma › 95% of commercial emphasis currently on skin melanoma (DecisionDx®-Melanoma) › Pipeline products → Two additional skin cancer products expected to launch in second half of 2020 › DecisionDx-SCC › Suspicious Pigmented Lesions › Combined, expected to increase estimated U.S. total addressable market size by $1.4B to $2.0B › HIGH VOLUME GROWTH and STRONG FINANCIALS › 4Q2019 DecisionDx-Melanoma volume increased by 37% over 4Q2018 › 2019 Revenue: $52 million vs $23 million in 2018 › 2019 Gross Margin: 86% vs 77% in 2018 › Cash at December 31, 2019, of $99 million › ADVANCING EVIDENCE DEVELOPMENT › 22 peer-reviewed publications for DecisionDx-Melanoma › Both DecisionDx-Melanoma and DecisionDx-UM achieved Category I MAAA CPT code status 3


 
CASTLE’S DERMATOLOGICAL CANCER PRODUCTS & CURRENT PIPELINE TARGET AN ESTIMATED $2.0B U.S. TOTAL ADDRESSABLE MARKET1 SQUAMOUS CELL SUSPICIOUS PIGMENTED MELANOMA CARCINOMA LESIONS INITIAL CASTLE ~130,000 patients classified ~200,000 patients present ~300,000 patients with an ADDRESSABLE as Stage I, II or III with high-risk features indeterminant biopsy MARKET2 ~$540M Estimated U.S. TAM ~$820M Estimated U.S. TAM ~$600M Estimated U.S. TAM COMPANIES WITH Castle: Castle (proj. 2H2020): Castle (proj. 2H2020): ADRESSABLE OFFERINGS GEP test for Suspicious IN THE U.S. Pigmented Lesions Myriad Genetics: myPath®Melanoma 1U.S. TAM = Total addressable market based on estimated patient population assuming average reimbursement rate among all payors. 2 Annual U.S. incidence for Stage I, II o r III melanoma estimated at 130,000; Annual U.S. incidence for squamous cell carcinoma estimated at 1,000,000 with addressable market limited to carcinomas with one or more high risk features; Annual U.S. incidence for suspicious pigmented lesion biopsies estimated at 2,000,000 with addressable 4 market limited to the 15% with an indeterminant biopsy.


 
CASTLE’S PRODUCTS & PRODUCT PIPELINE DEVELOPMENT VALIDATION COMMERCIALIZATION Secure Assay Algorithm Analytical Clinical Clinical Physician Commercial Guideline Medicare1 Samples Development Development Validation Validation Utility Adoption Payors Inclusion LCD effective Dec 2018         In process Cutaneous Melanoma 7 published studies ~3,900 1 published 11 published 3 published ordering Covered lives: study studies systematic clinicians 60 million reviews/practice (2019) guideline available Currently LCD effective Jul 2017           Uveal Melanoma >130 ordering 2 published 11 published 3 published Covered lives: Covered lives: clinicians studies studies studies 60 million 83 million (2019) Squamous Cell      Carcinoma pipeline Near term Near term Suspicious  In process In process Pigmented Lesion 1Includes Medicare Advantage. 5


 
SIGNIFICANT ACHEIVEMENTS AND EXPECTED FUTURE MILESTONES Continued evidence development for all commercialized products 2H2020: Anticipate LCD expansion for DecisionDx-Melanoma 2022: Potential effective effective LCD for Aug 2019: Expanded DecisionDx-SCC Dec 2018: Initial LCD draft LCD for 2H2020: Expected and suspicious effective for DecisionDx-Melanoma launch of SPL test pigmented lesion DecisionDx-Melanoma posted 2H2020: Expected (SPL) products launch of DecisionDx- SCC 2018 2019 2020 2021 2022 Feb 2019: Expanded July 2019: IPO 2H2020: Expected Late 2021: outside sales initiation of work on Potential draft territories to 23 additional LCD for DecisionDx-SCC Dec 2019: Expanded dermatology pipeline and suspicious outside sales products pigmented lesion territories to 32 2H2020: Expected (SPL) products commercial team expansion 6


 
The Skin Cancer Diagnostics Company


 
DECISIONDX-MELANOMA INFORMS THESE TWO IMPORTANT CLINICAL DECISIONS AND IMPACTS TREATMENT PLANS Diagnosis of localized cutaneous melanoma LIMITATIONS OF CURRENT STAGING 1 2 RISK OF RECURRENCE TO INFORM SLNB SURGERY MANAGEMENT 1 2 $20-24k 18% Is the risk of 12% Deaths from Melanoma: Is the risk of SLN- recurrence high 11.3% positivity high enough to warrant 66% enough to warrant initiation of imaging, referral for the high frequency SLNB surgery? follow-up, adjuvant 34% therapy, and clinical trial enrollment? Tumor thickness, SLNB Average Median Average age, and Tumor thickness, Positivity Complication Regional Reimbursed “Low-risk” “High-risk” DecisionDx- ulceration, SLN status Rate False Cost Patients Patients Melanoma and DecisionDx- Negative Melanoma Rate SLN = sentinel lymph node; SLNB = sentinel lymph node biopsy. MCR=Medicare Cost Report. Source: AJCC v7 J Clin Oncol 2009; SEER data release 2017; Morton et al. N Engl J Med 2014; Whiteman et al. J Invest Dermatol 2015; Shaikh et al. J Natl 8 Cancer Inst 2016; Poklepovic and Carvajal. Oncology 2018; Sondak and Zager. Ann Surg Oncol 2010. Moody et al. Euro Jrnl Surg Onc 2017.


 
DECISIONDX-MELANOMA WORKFLOW: AFTER DIAGNOSIS FOR MORE ACCURATE PREDICTION OF RISK Primary CM Tissue Class 1: 1A (FFPE) Lowest risk Low risk of SLN positivity (eligible T1-T2) Castle CAP/CLIA 1B Low risk of melanoma Low risk Patients with Certified Lab recurrence (T1-T4) Stage I – III Melanoma RNA Isolation Class 2: 2A 31 Gene Expression High-risk Profile Higher risk of SLN positivity (eligible T1-T2) High-risk of melanoma 2B Proprietary recurrence (T1-T4) Highest risk Algorithm Predicts Class 9 Gerami et al. Clin Cancer Res 2015; Gerami et al. JAAD 2015; Zager et al. BMC Cancer 2018; Gastman et al. JAAD 2019


 
DECISION 1 : SLNB SURGERY RULE OUT IN T1-T2 MELANOMAS Probability of a Positive Sentinel Lymph Node1 DecisionDx- DecisionDx-Melanoma Class 1A identifies a Melanoma All Ages ≥65 years 55-64 years <55 years Result (n=1065) (n=448) (n=247) (n=370) low risk for SLN positivity similar to stage T1a patients (for whom SLNB is not Class 1A 4.6% 1.6% 4.9% 7.6% recommended) Class 1B/2A 10.8% 6.9% 7.7% 19.6% Class 2B 18.8% 11.9% 30.8% 24.0% Class 1A Outcomes (all ages) Median follow-up MSS OS DMFS RFS Class 1A patients show excellent 5-year survival outcomes in >5 years 99.6% 98.2% 95.3% 93.5% long-term archival studies1 Outcomes confirmed in prospective, multi-center study2 3.2 years n/r 99.4% 98.7% 96.6% Data shows DecisionDx-Melanoma could result in 74% fewer SLNB surgeries, potentially saving U.S. healthcare system $250M1,3 1Vetto et al. Future Oncol 2019. 2Hsueh et al. Poster discussion abstract, ASCO 2019. 3Clearview health economic model, data on file. T1-T2 tumors are ≤2.0mm thick (“Breslow’s” thickness or depth). MSS = melanoma specific survival. OS = overall survival. DMFS = distant metastasis free survival. RFS = recurrence free survival. 10 n/r = not reported.


 
2 DECISIONDX-MELANOMA IS A SIGNIFICANT INDEPENDENT PREDICTOR OF OUTCOMES Archival, Multi-center1 Archival, Multi-center2 Prospective, Multi-center3 Prospective, Multi-center4 Disease-Free Survival Melanoma Specific Survival Recurrence-Free Survival Recurrence-Free Survival Stage I-II Stage I-III Stage I-III Stage I-II 10 10 10 30 ** ** 9 9 ** 9 25 8 8 8 7 7 7 ** 20 6 6 6 ** 5 5 5 15 4 4 4 ** 10 3 3 3 Hazard Ratio Hazard (multivariate)* ** 2 2 2 Hazard Ratio Hazard (multivariate)* ** 5 1 1 ** 1 ** 0 0 0 0 AJCC high risk Class 2 Thickness Mitotic rate Thickness Mitotic rate AJCC high risk Age Class 2 Ulceration SLN + Ulceration SLN + Class 2B *Hazard ratio is continuous for thickness, categorical for other endpoints; **Statistically significant Class 2 Data shown are from the first and most recent publications for archival and prospective studies 11 1Gerami et al. Clin Cancer Res 2015. 2Gastman et al. Jrnl Amer Acad Dermatol 2019. 3Hsueh et al. Jrnl Hematol Oncol 2017. 4Podlipnik et al. Jrnl Eur Asso Veneral and Derm 2019.


 
2 DECISIONDX-MELANOMA FURTHER STRATIFIES RISK OF RECURRENCE BEYOND AJCC (8TH Ed.) STAGING Stage NCCN I II III Risk Category 100 99.6% 98% >99% 94.8% Low Risk ≈AJCC IA ≈AJCC IA ≈AJCC IIA Stage I-IIA 90 89.5% 90% ≈AJCC IIIA 84.7% ≈AJCC IIIB 80 High Risk 77% Stage IIB-III AJCC MSS 70 Castle Class 1A MSS Castle Class 2B MSS 61.2% Melanoma - Specific Survival (%) (MSS) ≈AJCC IIIC+ 60 12 Prado et al. SKIN J Cutan Med 2018:suppl 2. n=690


 
DECISION 2 : 50% OF PATIENTS HAD A CHANGE IN MANAGEMENT % Change in Study Design # of Patients Management 4 consecutive clinical impact studies have Prospectively tested cohort, Berger1 multi-center. Retrospective pre 156 53% shown 47-53% change in risk of test / post test management. recurrence management Prospective, multi-center: Dillon2 247 49% Changes in patient management include: pre test / post test management › Imaging and labs 169 physician impact study: › Sentinel lymph node biopsy guidance Farberg3 patient vignettes with pre test / n/a 47-50% › Clinical visit frequency post test management › Referrals Prospectively tested cohort, single center. Retrospective Schuitevoerder4 pre test / post test management; 91 52% and modeling of prospective cohort 1Berger, et al. 2016 Curr Med Res Opin; 2Dillon et al. 2018 Skin; 3Farberg et al. 2017 Jrnl Drugs Derm; 4Schuitevoerder, et al. 2018 Jrnl Drugs Derm. 13


 
DECISIONDX-MELANOMA INFORMS BOTH PRIMARY TREATMENT DECISIONS, ADDRESSING THE ISSUES OF OVER- AND UNDER-TREATMENT 1 Rule-out SLNB for T1-T2 melanoma Class 1A: <5% SLN positivity and favorable prognosis patients, including T1a with adverse Class 1B-2B: ≥5% SLN positivity and higher rates of metastasis features SLNB decision: T1a with adverse features and T1b-T2 T1a T1a HR T1b T2 T3 T4 Risk of recurrence: Any T ≥0.3 mm Class 1A: lowest risk 2 Guide follow-up, referrals, imaging and adjuvant therapy Class 1B: low risk decisions for patients with any T ≥0.3 mm. Class 2A: high-risk Class 2B: highest risk Vetto et al. Future Oncol 2019; Marks et al SKIN J Cutaneous Med 2019 14


 
22 STRONG PEER-REVIEWED PUBLICATIONS SINCE 2015 FOR DECISIONDX-MELANOMA Validation & Validation & Prospective Studies Clinical Impact Studies Performance Studies Performance Studies • Vetto et al. Future Oncol 2019 • Keller et al. Cancer Med 2019 • Marks et al. SKIN 2019 • Mirsky et al. J Drugs Dermatol 2018 • Gastman et al. JAAD 2019 • Podlipnik et al. JEADV 2019 • Dillon et al. SKIN 2018 • Gastman et al. Head & Neck 2019 • Greenhaw et al. Dermatol Surg • Schuitevoerder et al. J Drugs 2018 • Zager et al. BMC Cancer 2018 Dermatol 2018 • Hsueh et al. J Hematol Oncol • Ferris et al. JAAD 2017 • Svoboda et al. J Drugs Dermatol 2017 • Gerami et al. CCR 2015 2018 • Gerami et al. JAAD 2015 • Farberg et al. J Drugs Dermatol 2017 • Berger et al. CMRO 2016 • Cook et al. Diagn Pathol 2018 Systematic Reviews and Practice Guidelines • Berman et al. SKIN 2019 • Dubin et al. Am J Clin Dermatol 2019 • Winkelmann et al. Derm Clin 2017 15


 
CASTLE’S LEAD PRODUCT, DECISIONDX-MELANOMA, INCREASED 29% IN 2019 YEAR-OVER-YEAR FROM 2018 DecisionDx-Melanoma DecisionDx-Melanoma Test DecisionDx-Melanoma Test Report Growth 4Q19 Report Growth New Ordering Clinicians 2019 4480 15,529 3270 12,032 24% 37% 9,300 29% 6,295 2,858 4Q18 4Q19 2015 2016 2017 2018 2019 2018 2019 16


 
PIPELINE PRODUCTS LEVERAGE OUR EXISTING COMMERCIAL CHANNEL Outside Sales Territories Call Points Product Primary Secondary 401 32 Dermatology (including Mohs), Dermatopathology Surgeons Medical Oncology 23 15 16 15 14 2 Dermatology (including Mohs), Dermatopathology Surgeons Medical Oncology Suspicious 3 Dermatopathology Dermatology 2015 2016 2017 2018 Feb 19 Dec 19 2H20 Pigmented Lesions 1 Expected commercial expansion in 2H20 to at least ~40 outside sales territories 2 Expected commercial launch in 2H20. 3 Expected commercial launch in 2H20 17


 
PRODUCT PIPELINE The Skin Cancer Diagnostics Company


 
TREATMENT PATHWAYS IN SQUAMOUS CELL CARCINOMA OF THE SKIN (SCC) ARE BASED UPON RISK OF METASTASIS “Low” Risk Treatment plans may include: 80% of › Curettage and electrodesiccation patients or Mohs or WLE Clinicopathologic factors determine Biopsy high vs low-risk based diagnosis of SCC high-risk is defined as having one or more clinicopathologic factors Treatment plans may include: “High” Risk › Mohs or WLE 20% of › Radiation therapy patients › Chemotherapy › Some centers perform SLNB LIMITATIONS OF CURRENT STAGING SYSTEMS (AJCC [head/neck only], BWH, NCCN): LOW POSITIVE PREDICTIVE VALUE (PPV): AJCC = 14-17%. BWH = 24-38%. NCCN <10%. NCCN Guidelines v2.2019 19


 
DECISIONDX-SCC APPROPRIATE USE IS TARGETED TO THE HIGH-RISK PATIENT AND PROVIDES FOR DIFFERENTIAL ACTIONS “Low” Risk Treatment plans may include: 80% of › Curettage and electrodesiccation patients or Mohs or WLE Clinicopathologic factors determine Biopsy high vs low risk based diagnosis of SCC High-risk is defined as having one or more clinicopathologic factors Class 2A Treatment plans may include: “High” Risk result › Mohs or WLE 20% of › Radiation therapy patients Class 2B › Chemotherapy result › Some centers perform SLNB Clinical Validation Study presented at Amer Soc Derm Surgery (Oct 2019): • n=321. 93% of patients were staged as “high-risk”. 16% overall metastatic rate. • NPV of Class 1 test result = 91%. 63% of patients were Class 1. • PPV of Class 2B test result = 60%. 20


 
SUSPICIOUS PIGMENTED LESIONS: PRODUCT CANDIDATE ADJUNCT DIAGNOSTIC SUPPORT FOR HISTOPATHOLOGICALLY CHALLENGING LESIONS Attractive Market Implications of Over- and Undercalling Melanoma ~2 million suspicious pigmented Overcalling can lead to: lesions biopsied annually › Unnecessary surgery potentially including SLNB › Unnecessary follow-up including imaging, and potentially adjuvant ~300,000 biopsies cannot be therapy and/or clinical trial participation confidently confirmed as melanoma or benign lesion Undercalling can miss: through histopathology alone › The most dangerous form of skin cancer Our Development Goal: Improve decision points through increased positive predictive value and identification of low-risk patients actually at high-risk of recurrence 21


 
The Skin Cancer Diagnostics Company


 
: STANDARD OF CARE Strong Evidence Base Uveal Melanoma – A Rare Eye Cancer › 14+ peer-reviewed publications, 2,000+ patients ~1,600 patients diagnosed in the U.S. annually Widespread adoption ~97% of patients – no evidence of metastatic › 90%+ of U.S. ocular oncology institutions order disease at the time of diagnosis › 1,526 reports issued in 2019 ~30% will develop metastases within 3 years Broad Coverage › 143+ million total lives covered › Medicare LCD covers patients with a confirmed diagnosis and no evidence of metastatic disease (Uveal Melanoma) 15-Gene Expression Profile (GEP) Test › “Existing ADLT” status effective May 2019 AJCC and NCCN Guideline Inclusion Low-risk: ~67% High-risk: ~33% Low Intensity Management High Intensity Management 23


 
FINANCIAL OVERVIEW The Skin Cancer Diagnostics Company


 
KEY PERFORMANCE INDICATORS DRIVING GROWTH › 2019: Expanded sales territories from 14 to 32 Report › Further expansion planned for 2H20 from 32 to at least ~40 Volume › 4Q19 vs 4Q18, DecisionDx-Melanoma report volume up 37%. New ordering clinicians up 24% in 2019 vs 2018 Revenue › DecisionDx-Melanoma ASP: Significant growth 2019 vs 2018 Reimbursement › Expanded draft LCD posted August 22, 2019 › DecisionDx-UM ASP: Continued 2019 over 2018 growth. PAMA rate effective Jan 1, 2021 Gross › 86% in 2019 Margin › Expect continued margin expansion driven by increasing ASPs and efficiencies of scale Profitability › 2 pipeline products expected to commercially launch in 2H2020, with additional New Product estimated $1.4B+ U.S. TAM Development Pipeline › Expect to leverage our existing sales channel to support the launch of additional products 25


 
STRONG 2019 REVENUE AND GROSS MARGIN Net Revenue ($ in millions) Gross Margin ($ in millions) $52 $45 $23 $17 2018 2019 2018 2019 Gross Margin % 77% 86% 26 Source: Company financials.


 
CASTLE BIOSCIENCES Improving Health Outcomes Of Patients With Skin Cancer Through Innovative, Clinically Actionable, Cost-Effective Diagnostics › INNOVATIVE PRODUCTS › Two commercialized products that improve treatment decisions for patients with melanoma › 95% of commercial emphasis currently on skin melanoma (DecisionDx®-Melanoma) › Pipeline products → Two additional skin cancer products expected to launch in second half of 2020 › DecisionDx-SCC › Suspicious Pigmented Lesions › Combined, expected to increase estimated U.S. total addressable market size by $1.4B to $2.0B › HIGH VOLUME GROWTH and STRONG FINANCIALS › 4Q2019 DecisionDx-Melanoma volume increased by 37% over 4Q2018 › 2019 Revenue: $52 million vs $23 million in 2018 › 2019 Gross Margin: 86% vs 77% in 2018 › Cash at December 31, 2019, of $99 million › ADVANCING EVIDENCE DEVELOPMENT › 22 peer-reviewed publications for DecisionDx-Melanoma › Both DecisionDx-Melanoma and DecisionDx-UM achieved Category I MAAA CPT code status 27


 
The Skin Cancer Diagnostics Company THANK YOU


 
Appendix


 
LEADERSHIP TEAM Board of Directors Name Prior Experience Name Derek Maetzold Founder, Director, Dan Bradbury President and CEO Frank Stokes Derek Maetzold Chief Financial Officer Bernhard Spiess Bonnie Anderson Chief Operating Officer Toby Juvenal Stuart Senior Vice President, Pharmaceuticals Mara Aspinall Sales Kristen Oelschlager, RN, CHC Brad Cole Senior Vice President, Operations Federico Monzon, MD, FCAP Joe Cook, III Chief Medical Officer Robert Cook, PhD Vice President, David Kabakoff Research & Development 30