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

SCHEDULE 14A INFORMATION
Proxy Statement Pursuant to Section 14(a) of the
Securities Exchange Act of 1934
(Amendment No.___)No.

)
Filed by the Registrant
Filed by a Partyparty other than the Registrant
Check the appropriate box:
Preliminary Proxy Statement
Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))
Definitive Proxy Statement
Definitive Additional Materials
Soliciting Material under § 240.14a-12

        Preliminary Proxy Statement
        Confidential, for Use of the Commission Only (as permitted by Rule
14a-6(e)(2))
        Definitive Proxy Statement
        Definitive Additional Materials
        Soliciting Material under §
240.14a-12
CASTLE BIOSCIENCES, INC.
(Name of Registrant as Specified In Its Charter)

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

Payment of Filing Fee (Check all boxes that apply):
        No fee required
        Fee paid previously with preliminary materials
        Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules
14a-6(i)(1)
and
0-11


LOGO


WHO WE ARE

Castle Biosciences, Inc. (sometimes referred to as the appropriate box):“Company,” “Castle,” “we,” “us” or “our”) is applying innovative diagnostics to inform disease management and improve patient outcomes. For the diseases that our portfolio of tests cover, we believe the traditional approach to developing a treatment plan for cancers and other diseases using clinical and pathology factors alone is inadequate and can be improved by incorporating the personalized information our diagnostic and prognostic (or risk stratification) tests provide.

MISSION, VISION AND VALUES

LOGO

Vision and Foundational Strategy

Since our inception in 2008, it has been our vision to transform disease management by keeping people first: patients, clinicians, employees and investors. This foundational strategy remains the guidepost for the direction of our company and the basis of long-term value creation.

LOGO


We have three strategic guideposts that create value for customers, patients and stockholders:

Exceptional Employees—We hire and keep the right people, by our commitment to doing the right thing for employees and nurturing our thriving culture.

Continuous Evolution & Improvement—We are an industry leader by challenging the status quo with deep scientific expertise, unique value insight and robust data development.

Customer & Solution Centric—We value best-in-class customer experience at all points along the testing journey, and we leverage multiple solutions for a single customer to provide a single source of high quality molecular diagnostic tests.


LOGO

April 12, 2023

Letter from our Chief Executive Officer

DEAR FELLOW STOCKHOLDERS,

We look forward to welcoming you to the Castle Biosciences, Inc. 2023 Annual Meeting of Stockholders to be held on May 25, 2023, at 10:00 a.m. Eastern Daylight Time. We value your voice and encourage you to submit your vote early. The following Notice of Annual Meeting and accompanying Proxy Statement will serve as your guide to the business to be conducted and provide details regarding the meeting.

I encourage you to read our 2023 Proxy Statement, our 2022 Annual Report and the other proxy materials and voting instructions on the pages that follow to ensure your shares are represented at the meeting.

2022 Performance Highlights

I am pleased to share that 2022 was a year of significant growth and success for Castle, driven by strong execution and our steadfast commitment to improve patient care through our innovative, actionable tests.

We delivered strong year-over-year growth in revenue and test report volume, reflecting solid execution by our Castle team. Our full-year 2022 revenue increased by 46% over 2021 to $137 million, significantly exceeding our initial 2022 revenue guidance of $115-120 million. With commercial team expansions in both our Dermatology and Gastroenterology franchises and consistent execution of our sales objectives, we delivered 44,419 total test reports in 2022, an increase of 58% compared to 2021. Additionally, in 2022, we saw strong

provider growth and continued adoption with 2,312 new ordering clinicians and 7,670 total ordering clinicians for our dermatologic tests.

Building on Our Momentum

The successful execution we have delivered is defined by the talented employees who call Castle home. They are driven and focused on our mission of improving health through innovative tests that guide patient care. We believe this drive enabled us to successfully execute our strategy, resulting in the significant growth in revenue and test reports, as well as operational improvements, seen in 2022.

As we look ahead, we remain focused on value creation, which we expect to be powered by our ongoing momentum and steady steps toward achieving our vision of transforming disease management. On behalf of all of us at Castle, thank you for your ongoing support. We are excited for the future.

Sincerely,

LOGO

DEREK J. MAETZOLD

Founder, President & CEO

No fee requiredLOGO

”Our full-year 2022 revenue increased by 46% over 2021 to $137 million, significantly exceeding our initial 2022 revenue guidance of $115-120 million.”


LOGO

Letter from Our Independent Chair

TO MY FELLOW CASTLE STOCKHOLDERS,

The other independent directors and I join Derek in encouraging you to attend Castle’s 2023 Annual Meeting of Stockholders.

I am pleased to continue to serve as your independent Board Chair and to update you on some of the important work of the Board and Committees. The Board values input from our stockholders and believes meaningful engagement helps the Board understand key issues of importance to better inform our decision-making process. Building trust and delivering sustainable, long-term value requires regular dialogue with our stockholders.

Robust Stockholder Engagement Outreach and Responsiveness

As I stated, the Board values your input and is committed to understanding your perspectives on important matters regarding the Company. Following a disappointing Say-on-Pay vote at our 2022 Annual Meeting of Stockholders, the Chair of our Compensation Committee and I, along with management, proactively conducted a robust outreach program to solicit feedback and to better understand our investors’ perspectives on corporate governance and executive compensation matters, including Say-on-Pay. A few highlights of our efforts and key actions taken in response include: our first grant of performance-based equity; adoption of a clawback policy and stock ownership guidelines; and a refreshed proxy statement and substantially enhanced disclosures, including the CD&A, to provide for greater clarity and transparency to enable stockholders to

better assess our overall program and the Compensation Committee’s decision-making process. Details of what we heard and how we responded to feedback received during this outreach can be found beginning on page 3. The Board is committed to continued engagement with our stockholders. The feedback we receive is integral to the Board’s decision-making process and your views help inform the Company’s policies, practices and disclosures.

Looking Ahead

Providing Board oversight of our long-term strategy will remain a priority for the Board in the coming year, and under Derek’s leadership, Castle’s management and the Company as a whole are committed to its growth strategy and building long-term value for stockholders. We believe the Company is well-positioned to execute on its goals, and as a Board, we will continue to hold management accountable for doing so.

On behalf of the independent directors, I join Derek in thanking you for choosing to invest in Castle Biosciences.

Sincerely,

LOGO

DANIEL M. BRADBURY

Independent Chair of the Board

”The Board values input from our stockholders and believes meaningful engagement helps the Board understand key issues of importance to better inform our decision-making process.”

Fee paid previously with preliminary materials
Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11LOGO



CASTLE BIOSCIENCES, INC.

LOGO

505 S. Friendswood Drive, Suite 401

Friendswood, Texas 77546


cstllogo011a.jpg


NOTICE OF ANNUAL MEETING OF STOCKHOLDERS

Notice of Annual Meeting of Stockholders

To Be Held On June 2, 2022

Dear Stockholder:
May 25, 2023

DEAR STOCKHOLDER:

You are cordially invited to attend the 20222023 annual meeting of stockholders (including any adjournments, continuations or postponements thereof, the “Annual Meeting”) of Castle Biosciences, Inc., a Delaware corporation (the “Company”).corporation. The Annual Meeting will be held on Thursday, June 2, 2022,May 25, 2023, at 11:10:00 a.m. (local time)Eastern Daylight Time at the San Luis Resort, Spa and Conference Center, 5222 Seawall Boulevard, Galveston, Texas 77551,Omni William Penn Hotel, 530 William Penn Place, Pittsburgh, Pennsylvania 15219, for the following purposes:

1.To elect the three Class III directors named in the Proxy Statement to hold office until the 2025 annual meeting of stockholders.
2.To ratify the selection of KPMG LLP by the Audit Committee of our board of directors as the independent registered public accounting firm of the Company for the fiscal year ending December 31, 2022.
3.To approve, on an advisory basis, the compensation of our named executive officers, as disclosed in the Proxy Statement.
4.To approve, on an advisory basis, the frequency of the advisory approval of the compensation of our named executive officers.
5.To conduct any other business properly brought before the Annual Meeting.

1.

To elect the three Class I directors named in the Proxy Statement to hold office until the 2026 annual meeting of stockholders.

2.

To ratify the selection of KPMG LLP by the Audit Committee of our board of directors as the independent registered public accounting firm of the Company for the fiscal year ending December 31, 2023.

3.

To approve, on an advisory basis, the compensation of our named executive officers, as disclosed in the Proxy Statement.

4.

To conduct any other business properly brought before the Annual Meeting.

These items of business are more fully described in the Proxy Statement accompanying this Notice.

The record date for the Annual Meeting is April 7, 2022.4, 2023. Only stockholders of record at the close of business on that date may vote at the Annual Meeting or any adjournment, continuation or postponement thereof.

On or about April 21, 2022,12, 2023, we expect to mail to our stockholders a Notice of Internet Availability of Proxy Materials containing instructions on how to access the Proxy Statement and our Annual Report on Form 10-K for the fiscal year ended December 31, 2021,2022, including how to vote via the internet, by telephone or by mail.

By Order of the Board of Directors,
djmimage3a.jpg
LOGO
Derek J. Maetzold
President and Chief Executive Officer

Friendswood, Texas

April 21, 2022


12, 2023

Important Notice Regarding the Availability of Proxy Materials for the Annual Meeting of Stockholders

to Be Held on Thursday, June 2, 2022,May 25, 2023, at 11:10:00 a.m. (local time).

Eastern Daylight Time.

OurProxy Statement and Annual Report on Form 10-K for the fiscal year ended December 31, 2021,2022, are available at www.proxyvote.com.




Table of Contents

YOUR VOTE IS IMPORTANT. All stockholders are cordially invited to attend the Annual Meeting in person. Whether or not you plan to attend the Annual Meeting, you are encouraged to submit your proxy and voting instructions via the internet, by telephone, or, if you received a paper proxy card and voting instructions by mail, voting your shares by completing, signing and dating the proxy card as promptly as possible and returning it in the enclosed envelope (to which no postage need be affixed if mailed in the United States). Even if you have given your proxy, you may still vote in person if you attend the Annual Meeting. Please note, however, that if your shares are held of record by a broker, bank or other agent and you wish to vote at the Annual Meeting, you must obtain from the record holder a proxy issued in your name. You may revoke a previously delivered proxy at any time prior to the Annual Meeting. You may do so automaticallyProxy Statement accompanying this Notice.

The inclusion of our website address here or elsewhere in the Proxy Statement accompanying this Notice does not incorporate by voting in person atreference into the Annual Meeting,Proxy Statement the information on or by delivering to us a written notice of revocation or a duly executed proxy bearing a date later than the date of the proxy being revoked.


accessible through our website.


LOGO

Table of Contents

Page
No.
PROXY SUMMARY1

Voting Matters

1

How to Vote

1

Business Overview

1

2022 Performance Highlights

1

ESG and Our Corporate Purpose

2

Stockholder Outreach

3

Board Highlights

4

Governance Highlights

6

Compensation Highlights

7
PROPOSAL 1—ELECTION OF DIRECTORS8
INFORMATION REGARDING THE BOARD OF DIRECTORS AND CORPORATE GOVERNANCE13

Composition of the Board of Directors

13

Experience and Attributes of the Board of Directors

14

Director Time Commitment

14

Criteria for Board Membership

14

Board Structure

15

Board Diversity

15

Director Independence

16

Leadership Structure

16

Meetings of the Board of Directors

16

Role of the Board of Directors in Risk Oversight

16

Information Regarding Committees of the Board of Directors

17

Audit Committee

17

Compensation Committee

19

Nominating and Corporate Governance Committee

20

Director Compensation

21

Non-Employee Director Compensation Policy

22

Stock Ownership Guidelines

23

Environmental, Social and Governance Program

23

Stockholder Communications with the Board of Directors

27
PROPOSAL 2—RATIFICATION OF SELECTION OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM28
PROPOSAL 3—ADVISORY VOTE ON NAMED EXECUTIVE OFFICER COMPENSATION30
SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT31
EXECUTIVE OFFICERS33
COMPENSATION DISCUSSION AND ANALYSIS34

Named Executive Officers

34

Business Overview

34

Summary of our Executive Compensation Program

35

Executive Compensation Philosophy and Objectives

36

2022 Stockholder Outreach

36

Stockholder Feedback and Board Responsiveness

37

Compensation Committee Oversight of Compensation-Related Risks

37

Compensation Determination Process

38

Elements of Our Executive Compensation Program

41

Agreements with our NEOs

45

Potential Benefits upon Termination or Change-in-Control

46


CASTLE BIOSCIENCES, INC.

PROXY STATEMENT
FOR THE 2022 ANNUAL MEETING OF STOCKHOLDERS

TABLE OF CONTENTS

Page
No.

Pension Benefits and Nonqualified Deferred Compensation

49

Other Compensation Practices and Policies

49

Compensation Committee Report

51
Page
No.
Questions and Answers About These Proxy Materials and VotingEXECUTIVE COMPENSATION TABLES52
Proposal 1: Election of Directors

Summary Compensation Table

52
Information Regarding the Board

Grants of Directors and Corporate GovernancePlan-Based Awards

53
Proposal 2: Ratification of Selection of Independent Registered Public Accounting Firm

Outstanding Equity Awards at Fiscal Year-End

54
Proposal 3: Approval of the Compensation of Our Executive Officers

Option Exercises and Stock Vested in 2022

55
Proposal 4: Approval of the Frequency of the Say-on-Pay Vote

Potential payments Upon Termination or Change-in-Control

56
Executive Officers
Security Ownership of Certain Beneficial Owners and ManagementCEO PAY RATIO57
Executive Compensation
Director CompensationPAY VERSUS PERFORMANCE58
Equity Compensation Plan Information
Transactions with Related Persons and IndemnificationsDELINQUENT SECTION 16(a) REPORTS61
Householding of Proxy Materials
Annual Report on Form 10-KEQUITY COMPENSATION PLAN INFORMATION62
Other Matters
42TRANSACTIONS WITH RELATED PERSONS AND INDEMNIFICATIONS66
HOUSEHOLDING OF PROXY MATERIALS69
ANNUAL REPORT ON FORM 10-K70
QUESTIONS AND ANSWERS ABOUT THESE PROXY MATERIALS AND VOTING71
OTHER MATTERS76



CASTLE BIOSCIENCES, INC.
505 S. Friendswood Drive, Suite 401
Friendswood, Texas 77546
PROXY STATEMENT
FOR THE 2022 ANNUAL MEETING OF STOCKHOLDERS
To Be Held on June 2, 2022
QUESTIONS AND ANSWERS ABOUT THESE PROXY MATERIALS AND

Proxy Summary

VOTING

Why did I receive a notice regarding MATTERS

Please read this Proxy Statement for the availability of proxy materials on the internet?

Pursuant to rules adopted by the Securities and Exchange Commission (the “SEC”), we have elected to provide access to our proxy materials over the internet. Accordingly, we have sent you a Notice of Internet Availability of Proxy Materials (the “Notice”) because the board of directors of Castle Biosciences, Inc., a Delaware corporation (sometimes referred to as the “Company,” “Castle,” “we,” “us” or “our”) is soliciting your proxy to vote at Castle’s 20222023 annual meeting of stockholders (including any adjournments, continuations or postponements thereof, the “Annual Meeting”). All stockholders will have the ability to access the proxy materialsthereof) of Castle Biosciences, Inc., a Delaware corporation and our Annual Report on the website referred to in the Notice or request to receive a printed set of the proxy materials. Instructions on how to access the proxy materials over the internet or to request a printed set of proxy materials may be found in the Notice.
We intend to mail the Notice on or about April 21, 2022, to all stockholders of record as of the close of business on April 7, 2022, the record date for the Annual Meeting, entitled to vote at the Annual Meeting.
Will I receive any other proxy materials by mail?
We may send you a proxy card, along with a second Notice, on or after May 1, 2022.
How do I attend the Annual Meeting?
The meeting will be held on Thursday, June 2, 2022, at 11:00 a.m. (local time) at the San Luis Resort, Spa and Conference Center, 5222 Seawall Boulevard, Galveston, Texas 77551. Directions to the Annual Meeting may be found at www.CastleBiosciences.com. The inclusion of our website address here and elsewhere in this Proxy Statement does not incorporate by reference into this Proxy Statement the information on or accessible through our website. Information on how to vote in person at the Annual Meeting is discussed below.
Who can vote at the Annual Meeting?
Only stockholders of record as of the close of business on April 7, 2022, the record date for the Annual Meeting, will be entitled to vote at the Annual Meeting. On this record date, there were 25,486,030 shares of common stock outstanding and entitled to vote.
Stockholder of Record: Shares Registered in Your Name
If, as of the close of business on April 7, 2022, your shares were registered directly in your name with Castle’s transfer agent, Broadridge Corporate Issuer Solutions, Inc., then you are a stockholder of record. As a stockholder of record, you may vote in person at the Annual Meeting or vote by proxy. Whether or not you plan to attend the Annual Meeting, we urge you to fill out and return the proxy card that you may request or that we may elect to deliver at a later time, or vote by proxy over the telephone or on the internet as instructed below to ensure your vote is counted.
Beneficial Owner: Shares Registered in the Name of a Broker, Bank or other Agent
If, as of the close of business on April 7, 2022, your shares were held, not in your name, but rather in an account at a brokerage firm, bank or other similar organization, then you are the beneficial owner of shares held in “street name” and the Notice is being forwarded to you by that organization. The organization holding your account is considered to be the stockholder of record for purposes of voting at the Annual Meeting. As a beneficial owner, you have the right to direct your broker, bank or other agent regarding how to vote the shares in your account. You are also invited to attend the Annual Meeting. However, since you are not the stockholder of record, you may not vote your shares at the Annual Meeting unless you request and obtain a valid proxy from your broker, bank or other agent.
On what matters am I voting?
There are four matters scheduled for a vote:
Proposal 1: To elect the three Class III directors named herein to hold office until the 2025 annual meeting of stockholders;
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Proposal 2: To ratify the selection of KPMG LLP by the Audit Committee of our board of directors as our independent registered public accounting firmForm 10-K for the fiscal year endingended December 31, 2022;
Proposal 3: To approve,2022 before voting on an advisory basis, the compensation of our named executive officers, as disclosed infollowing matters:

         Board Vote
Recommendation
  Page Reference
(for more detail)
 1   Election of Three Class I Directors  FOR each nominee  8
 2   Ratification of Independent Auditor  FOR  28
 3   Advisory Approval of Executive Compensation (Say-on-Pay)  FOR  30

How to Vote

By Internet (www.proxyvote.com)

By Phone (1-800-690-6903)

By Mail (Vote Processing, c/o Broadridge, 51 Mercedes Way, Edgewood, NY 11717)

See this Proxy Statement (commonly known as a “say-on-pay” proposal);for directions on voting by proxy and

Proposal 4: To approve, to see how your votes are counted.

BUSINESS OVERVIEW

Our commercially available proprietary tests focus on answering clinical questions arising during the treatment of:

Dermatologic cancers—DecisionDx®-Melanoma, DecisionDx®-SCC, and MyPath® Melanoma

Uveal melanoma—DecisionDx®-UM

Barrett’s esophagus—TissueCypher® Barrett’s Esophagus Test

Mental health diagnoses—IDgenetix®

Together, we believe these commercial products support an advisory basis,estimated total addressable market of $8.0 billion in the frequency of the advisory approval of the compensationUnited States.

Our Test Portfolio

Currently, our revenue is primarily generated by our DecisionDx-Melanoma risk stratification test for cutaneous melanoma, although each of our named executive officers (commonly knownother commercial tests do contribute to our overall revenue. We map out the patient journey of diagnostic test services as a “say-on-frequency” proposal).

What are the voting recommendationsstarting with (i) screening of Castle’s boardhealthy individuals, to (ii) supporting diagnostic clarity in patients with signs or symptoms of directors?
Our board of directors recommendsdisease, to (iii) risk stratification or prognosis, to (iv) response to treatment for specific treatment selection and to (v) minimal residual disease/recurrence monitoring. We currently focus our investments on innovative test services that you vote:
“FOR” the election of the three Class III directors named herein to hold office until the 2025 annual meeting of stockholders (Proposal 1);
“FOR” the ratification of the selection of KPMG LLP by the Audit Committee of our board of directors as our independent registered public accounting firm for the fiscal year ending December 31, 2022 (Proposal 2);
“FOR” the approval, on an advisory basis, of the compensation of our named executive officers, as disclosed in this Proxy Statement (Proposal 3); and
“1 YEAR” as the preferred frequency of the advisory approval of the compensation of our named executive officers (Proposal 4).
What if another matter is properly brought before the Annual Meeting?
The board of directors knows of no other matters that will be presented for consideration at the Annual Meeting. If any other matters are properly brought before the Annual Meeting, it is the intention of the persons namedassist in the accompanying proxyfollowing areas along the patient journey: providing diagnostic clarity in patients with signs or symptoms of disease, risk stratification and response to vote on those matters in accordance with their best judgment.
How do I vote?
You may either vote “FOR” all the nominees to the board of directors or you may “WITHHOLD” your vote for any nominee you specify. For each of Proposal 2treatment. We have six commercially available proprietary tests that assist clinicians and Proposal 3, you may vote “FOR” or “AGAINST” or abstain from voting. For Proposal 4, you may vote in favor of “1 YEAR,” “2 YEARS,” “3 YEARS” or abstain from voting.
The procedures for voting are fairly simple:
Stockholder of Record: Shares Registered in Your Name
If you are a stockholder of record, you may vote in person at the Annual Meeting, vote by proxy over the telephone, vote by proxy through the internet or vote by proxy using a proxy card that you may request or that we may elect to deliver at a later time. Whether or not you plan to attend the Annual Meeting, we urge you to vote by proxy to ensure your vote is counted. You may still attend the Annual Meeting even if you have already voted by proxy. In such case and if you vote at the Annual Meeting, your previously submitted proxy will be disregarded.
To vote in person, attend the Annual Meeting and we will give you a ballot when you arrive.
To vote using the proxy card, simply complete, sign and date the proxy card that may be delivered and return it promptly in the envelope provided. If you return your signed proxy card to us before the Annual Meeting, we will vote your shares as you direct.
To vote over the telephone, dial toll-free 1-800-690-6903 using a touch-tone phone and follow the recorded instructions. You will be asked to provide the company number and 16-Digit Control Number from the Notice. Your telephone vote must be received by 11:59 p.m. Eastern Time on June 1, patients along this continuum.

2022 to be counted.

To vote through the internet, go to www.proxyvote.com to complete an electronic proxy. You will be asked to provide the company number and 16-Digit Control Number from the Notice. Your internet vote must be received by 11:59 p.m. Eastern Time on June 1, 2022, to be counted.
Beneficial Owner: Shares Registered in the Name of Broker or Bank
If you are a beneficial owner of shares registered in the name of your broker, bank or other agent, you should have received a Notice containing voting instructions from that organization rather than from Castle. Simply follow the voting instructions in the Notice to
2

ensure that your vote is counted. Alternatively, you may vote by telephone or over the internet as instructed by your broker or bank. To vote in person at the Annual Meeting, you must obtain a valid proxy from your broker, bank or other agent. Follow the instructions from your broker, bank or other agent included with these proxy materials, or contact that organization to request a proxy form.
PERFORMANCE HIGHLIGHTS

Internet proxy voting may be provided to allow you to vote your shares online, with procedures designed to ensure the authenticity and correctness of your proxy vote instructions. However, please be aware that you must bear any costs associated with your internet access, such as usage charges from internet access providers and telephone companies.

$137.0 million in revenue, 46% year-over-year growth


How many votes do I have?
On each matter to be voted upon, you have one vote for each share of common stock you own as of April 7, 2022.
If I am a stockholder of record and I do not vote, or if I return a proxy card or otherwise vote without giving specific voting instructions, what happens?
If you are a stockholder of record and do not vote by completing your proxy card, by telephone, through the internet or in person at the Annual Meeting, your shares will not be voted.
If you return a signed and dated proxy card or otherwise vote without marking voting selections, your shares will be voted, as applicable, “FOR” the election of the three nominees for Class III director (Proposal 1), “FOR” the ratification of the selection of KPMG LLP as our independent registered public accounting firm for the fiscal year ending December 31, 2022 (Proposal 2), “FOR” the approval, on an advisory basis, of the compensation of our named executive officers (Proposal 3) and “1 YEAR” as the preferred frequency of the advisory approval of our executive compensation (Proposal 4). If any other matter is properly brought before the Annual Meeting, it is the intention of the persons named in the accompanying proxy to vote on those matters in accordance with their best judgment.
If I am a beneficial owner of shares held in street name and I do not provide my broker, bank or other agent with voting instructions, what happens?
If you are a beneficial owner of shares held in street name and you do not instruct your broker, bank or other agent how to vote your shares, your broker, bank or other agent may still be able to vote your shares in its discretion. In this regard, under the rules of the New York Stock Exchange (the “NYSE”), brokers, banks and other securities intermediaries that are subject to NYSE rules may use their discretion to vote your “uninstructed” shares with respect to matters considered to be “routine” under NYSE rules, but not with respect to “non-routine” matters. In this regard, Proposals 1, 3 and 4 are considered to be “non-routine” under NYSE rules, meaning that your broker may not vote your shares on these proposals in the absence of your voting instructions. However,Proposal 2 is considered to be a “routine” matter under NYSE rules, meaning that if you do not return voting instructions to your broker by its deadline, your shares may be voted by your broker in its discretion on Proposal 2.

If you are a beneficial owner of shares held in street name, in order to ensure your shares are voted in the way you would prefer, you must provide voting instructions to your broker, bank or other agent by the deadline provided in the materials you receive from your broker, bank or other agent.

44,419 delivered test reports, 58% year-over-year growth


Who is paying for this proxy solicitation?
We will pay for the entire cost of soliciting proxies. In addition to these proxy materials, our directors and employees may also solicit proxies in person, by telephone, or by other means of communication. Directors and employees will not be paid any additional compensation for soliciting proxies. We may also reimburse brokerage firms, banks and other agents for the cost of forwarding proxy materials to beneficial owners.
What does it mean if I receive more than one Notice?
If you receive more than one Notice, your shares may be registered in more than one name or in different accounts. Please follow the voting instructions on the Notices to ensure that all of your shares are voted.
Can I change my vote after submitting my proxy?
Stockholder of Record: Shares Registered in Your Name
Yes. You can revoke your proxy at any time before the final vote at the Annual Meeting. If you are the record holder of your shares, you may revoke your proxy in any one of the following ways:
You may submit another properly completed proxy card with a later date.
You may grant a subsequent proxy by telephone or through the internet.
3

You may send a timely written notice that you are revoking your proxy to Castle Biosciences, Inc., 505 S. Friendswood Drive, Suite 401, Friendswood, Texas 77546, Attn: Corporate Secretary.
You may attend the Annual Meeting and vote. Simply attending the Annual Meeting will not, by itself, revoke your proxy.
Your most current proxy card or telephone or internet proxy is the one that will be counted.
Beneficial Owner: Shares Registered in the Name of Broker or Bank
If your shares are held by your broker, bank or other agent, you should follow the instructions provided by your broker, bank or other agent.
When are stockholder proposals and director nominations due for next year’s annual meeting?
To be considered for inclusion in the Company’s proxy materials for next year’s annual meeting, your proposal must be submitted in writing by Thursday, December 22, 2022, to our Corporate Secretary at our principal executive offices at 505 S. Friendswood Drive, Suite 401, Friendswood, Texas 77546, and you must comply with all applicable requirements of Rule 14a-8 promulgated under the Securities Exchange Act of 1934, as amended (the “Exchange Act”). Pursuant to our amended and restated bylaws, if you wish to submit a proposal (including a director nomination) at the meeting that is not to be included in next year’s proxy materials, you must do so not later than the close of business on Saturday, March 4, 2023 and no earlier than the close of business on Thursday, February 2, 2023; provided, however, that if next year’s annual meeting is advanced more than 30 days prior to or delayed by more than 30 days after Friday, June 2, 2023, your proposal must be submitted not earlier than the close of business on the 120th day prior to such annual meeting and not later than the close of business on the 90th day prior to such annual meeting or the 10th day following the day on which public announcement of such meeting is first made. You are advised to review our amended and restated bylaws, which contain additional requirements about advance notice of stockholder proposals and director nominations.
In addition to satisfying the foregoing requirements under our amended and restated bylaws, to comply with the universal proxy rules (once effective), stockholders who intend to solicit proxies in support of director nominees other than our board of directors’ nominees must provide notice that sets forth any additional information required by Rule 14a-19 promulgated under the Exchange Act no later than April 3, 2023.
How are votes counted?
Votes will be counted by the inspector of election appointed for the Annual Meeting. Abstentions will have no effect on Proposal 1. Abstentions will be counted towards the vote total for Proposals 2, 3 and 4 and will have the same effect as “AGAINST” votes. Broker non-votes will be counted towards the presence of a quorum but will not be counted towards the vote total for any proposal.
What are “broker non-votes”?
When a beneficial owner of shares held in “street name” does not give instructions to the brokerage firm, bank, dealer or other agent holding the shares as to how to vote on matters deemed to be non-routine under applicable NYSE rules, the broker or nominee cannot vote the shares. These unvoted shares are counted as “broker non-votes.”

As a reminder, if you are a beneficial owner of shares held in street name, in order to ensure your shares are voted in the way you would prefer, you must provide voting instructions to your broker, bank or other agent by the deadline provided in the materials you receive from your broker, bank or other agent.

December 31, 2022, cash and cash equivalents of $122.9 million and $135.7 million of marketable investment securities


4

How many votes are needed to approve each proposal?
The following table summarizes the minimum vote needed to approve each proposal and the effect of abstentions and broker non-votes:

Proposal Number

CASTLE BIOSCIENCES | 2023 Proxy Statement

Proposal Description

1


Proxy Summary

Publication of 14 peer-reviewed studies across all franchises

Addition of mental health franchise with acquisition of AltheaDx, Inc. (“AltheaDx”) in April 2022

ESG AND OUR CORPORATE PURPOSE

At Castle, we are focused on applying innovative diagnostics to inform disease management and improve patient outcomes. We published our first Environmental, Social and Governance (“ESG”) Report in 2021, recognizing the link between strong ESG practices and sustainable long-term value creation for our stockholders. Our board of directors (which we may refer to as our “Board” or the “Board”) has delegated the oversight of the effectiveness of our ESG initiatives to the Audit Committee, which reviews and discusses Castle’s ESG risk management, strategy, initiatives and policies with our management team. We are committed to advancing our ESG strategy, improving our capabilities and measuring our progress based on certain key performance indicators. As part of our 2022 ESG efforts, we prioritized assessing our Scope 1 and 2 greenhouse gas (“GHG”) emissions; established a diversity, equity and inclusion (“DEI”) statement (“DEI Statement”); and developed a code of conduct for our vendors (“Vendor Code of Conduct”). As we move forward in 2023, we will continue to identify ways to enhance and deliver on our commitment to patients, clinicians, employees and investors.

LOGO

LOGO

Vote Required for ApprovalEffect

2

2023 Proxy Statement

LOGO


Proxy Summary

2022 STOCKHOLDER OUTREACH

The Board is committed to sound corporate governance, which we believe requires feedback from our stockholders to inform the Board’s decisions and guide our overall approach to governance. Our stockholder outreach in 2022 provided the Board with valuable insights into our stockholders’ perspectives on our executive compensation program and other matters of importance. We endeavor to maintain sound compensation and corporate governance practices and will continue to evaluate our compensation program to further align our executive compensation program with the long-term interests of our stockholders. We are committed to understanding stockholders’ perspectives and anticipate ongoing stockholder outreach.

For many years, we followed a consistent approach to the design of our executive compensation program. At our 2022 annual meeting of stockholders, we asked our stockholders to indicate their support for the compensation of our named executive officers by casting a non-binding, advisory vote “FOR” such compensation as described in the proxy statement (commonly known as a “Say-on-Pay” proposal). Our inaugural Say-on-Pay proposal received the support of approximately 41% of the votes cast, and we were disappointed with the outcome. In response, in order to better understand investor concerns, we conducted a robust, Board-driven stockholder outreach and engagement program in the fall of 2022, which informed the Board’s decisions for 2023.

Prior to our 2022 annual meeting of stockholders, we engaged Morrow Sodali LLC (“Morrow Sodali”) to assist our Board with certain governance matters. Following the low support of our Say-on-Pay proposal, we expanded the engagement of Morrow Sodali to help facilitate a direct stockholder outreach program. We initiated our stockholder outreach in the fourth quarter of 2022 to specifically gain input on the Say-on-Pay vote and gain feedback on our compensation program. During this process, we reached out to our 25 largest stockholders, representing 57% of our then-outstanding common stock. We held discussions with 10 of the 25 largest stockholders, representing 36% of our then-outstanding common stock. The other 15 stockholders, representing 21% of our then-outstanding common stock, either declined to meet with us or did not respond. In addition to executive compensation, we discussed a broad range of other ESG topics, which we have reviewed and discussed with the Board. These stockholder discussions were led by our Board Chair and/or Compensation Committee Chair. Certain members of the executive management team also participated on the calls, including our Chief Executive Officer (“CEO”) and our Vice President, Investor Relations & Corporate Affairs.

In 2022, these discussions covered a wide range of topics, including:

Executive compensation

Director time commitment

Board diversity

Enhancement to proxy disclosures

Board structure

Conflicts of Abstentionsinterest

After considering stockholder feedback gathered in the fall of 2022, as well as input from management and based in part on the Compensation Committee’s independent compensation consultant, the Compensation Committee approved significant changes to our executive compensation program that were implemented in late 2022 and early 2023. These changes included expanding our executive compensation disclosure in our proxy statement beyond the scaled disclosure required of smaller reporting companies and discussing the material principles underlying Castle’s executive compensation policies and decisions and the most important factors relevant to analysis of those policies and decisions; including performance-based equity incentive awards in the compensation package for our executive officers, adoption of an Incentive Compensation Recovery Policy (“Clawback Policy”), adoption of stock ownership guidelines for our directors and executive officers and adoption of a policy on director time commitment, each of which are outlined in more detail in this Proxy Statement. The Compensation Committee will continue to consider stockholder feedback and the outcomes of future Say-on-Pay votes when evaluating our executive compensation programs and practices and making compensation decisions for our executive officers.

Effect of Broker Non-Votes
1

CASTLE BIOSCIENCES | 2023 Proxy Statement

Election of Directors

3


Proxy Summary

BOARD HIGHLIGHTS

Biographies for Class I Director Nominees (term expiring in 2023)

Set forth below is biographical information for the Class I director nominees. This includes information regarding each director’s experience, qualifications, attributes or skills that led our Board to recommend them for service as a director.

Nominees receiving the most “FOR” votes; “WITHHOLD” votes will have no effectNot Applicable

Name

ExperienceAttributes
No effect
2

Ellen Goldberg

  Founder and President of CHORD Consulting

  Previously served as Vice President of Marketing at Crescendo Biosciences and led marketing at Genomic Health

  Holds a B.S. degree in Chemistry from Yale University and a M.S. in chemistry and an MBA degree from Stanford University

  Commercial Execution Experience

  Life Science Industry Experience

  Digital Health

  Regulatory/Lab Services Reimbursement

  Diverse Board Member (Gender or Ethnic/Racial)

Ratification

Miles D. Harrison

  Previously served as the North American President and General Manager at Galderma Laboratories, L.P. Also served as Galderma’s Vice President and General Manager of the selection of KPMG LLP asConsumer Business Unit.

  Holds a B.A. degree in geography from Sheffield Hallam University in the Company’s independent registered public accounting firm for the fiscal year ending December 31, 2022United Kingdom

  Dermatology Specific Experience

  Commercial Execution Experience

  Life Science Industry Experience

  Financial Analysis & Control Experience

“FOR” votes

Tiffany P. Olson

  Previously served as President of Nuclear & Precision Health Solutions at Cardinal Health

  Previously served as President at NaviMed and CEO and President of Roche Diagnostics Corporation

  Holds a B.S. degree in business from University of Minnesota and MBA degree from the holdersUniversity of a majority of shares presentSt. Thomas

  Commercial Execution Experience

  Life Science Industry Experience

  Financial Analysis & Control Experience

  Digital Health

  Health System Experience

  Diverse Board Member (Gender or represented by proxy and entitled to vote on the matterEthnic/Racial)

Against
Not applicable(1)
3

4

Advisory approval of the compensation of our named executive officers

2023 Proxy Statement

“FOR” votes from the holders of a majority of shares present or represented by proxy and entitled to vote on the matterAgainstNo effect
4Advisory approval of “1 YEAR,” “2 YEARS” or “3 YEARS” as the preferred frequency of the say-on-pay votePreferred frequency receiving votes from the holders of a majority of shares present or represented by proxy and entitled to vote on the matterAgainstNo effect

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_____________________
(1)This proposal

Proxy Summary

Biographies for Class II and Class III Directors

Set forth below is considered to be a “routine” matter under the rules of the NYSE. Accordingly, if you hold your shares in street name and do not provide voting instructions to your broker, bank or other agent that holds your shares, your broker, bank or other agent has discretionary authority under NYSE rules to vote your shares on this proposal.

What is the quorum requirement?
A quorum of stockholders is necessary to hold a valid annual meeting. A quorum will be present if stockholders holding a majority of the outstanding shares entitled to vote are present in person at the Annual Meeting or represented by proxy. On April 7, 2022, the record datebiographical information for the Annual Meeting, there were 25,486,030 shares outstandingClass II and entitled to vote. Thus, the holdersClass III directors, whose terms of 12,743,016 shares must be present in person or represented by proxy at the Annual Meeting to haveoffice as a quorum.
Your sharesdirector will be counted towards the quorum only if you submit a valid proxy (or one is submitted on your behalf by your broker, bank or other agent) or if you vote at the Annual Meeting. Abstentions will be counted towards the quorum requirement. If there is no quorum, the chairperson of the Annual Meeting or the holders of a majority of shares present at the meeting in person or represented by proxy may adjourn the meeting to another date.
How can I find out the results of the voting at the Annual Meeting?
Preliminary voting results will be announced at the Annual Meeting. In addition, final voting results will be published in a Current Report on Form 8-K (“Form 8-K”) that we expect to file with the SEC within four business dayscontinue after the Annual Meeting. If final voting resultsThis includes information regarding each director’s experience, qualifications, attributes or skills that led our Board to recommend them for service as a director.

Name

ExperienceAttributes

Class II—Term Expiring in 2024

Mara G. Aspinall

  Managing Director of BlueStone Venture Partners.

  President and CEO of Health Catalysts Group.

  Previously served as President and CEO of the Ventana Medical Systems and Global Head of Roche Tissue Diagnostics.

  Currently serves as a director of Abcam, DA32 and OraSure Technologies.

  Holds a B.A. degree in International Relations from Tufts University and an MBA from Harvard Business School.

  Commercial Execution

  Life Science Industry Experience

  Financial Analysis & Control Experience

  Regulatory/Lab Services Reimbursement

  Diverse Board Member (Gender or Ethnic/Racial)

  Cybersecurity

Daniel M. Bradbury

  Currently serves on the board of directors of Equillium, Inc. Previously served as an executive and CEO.

  Managing member of BioBrit, LLC.

  Previously served as President, CEO and Director of Amylin Pharmaceuticals, Inc.

  Serves on the board of directors of numerous privately held companies.

  Holds a Bachelor of Pharmacy from Nottingham University and a Diploma in Management Studies from Harrow and Ealing Colleges of Higher Education in the United Kingdom.

  Commercial Execution

  Life Science Industry Experience

  Financial Analysis & Control Experience

  R&D Scientific Leadership

  Regulatory/Lab Services Reimbursement

Class III—Term Expiring in 2025

Kimberlee S. Caple

  Currently serves as the President of the Genetic Analysis Division, at Thermo Fisher Scientific Inc.

  Previously served as the Vice President and General Manager of Genetics Sciences of the Genetics Sciences Business and the Vice President and General manager for the Capillary Electrophoresis Business Unit at Thermo Fisher Scientific Inc.

  Holds a B.S degree in biology from Purdue University.

  Life Science Industry Experience

  Financial Analysis & Control Experience

  Health System Experience

  R&D Scientific Leadership

  Regulatory/Lab Services Reimbursement

  Diverse Board Member (Gender or Ethnic/Racial)

CASTLE BIOSCIENCES | 2023 Proxy Statement

5


Proxy Summary

Name

ExperienceAttributes

G. Bradley Cole

  Previously served as General Manager of Precision Oncology, a unit of Exact Sciences Corporation.

  Previously served as Chief Financial Officer and Chief Operating Officer at Genomic Health.

  Previously held Chief Financial Officer positions at multiple publicly traded companies, including Applied Biosystems, Inc.

  Holds a B.S degree in accounting from Biola University and an MBA from San Jose State University.

  Life Science Industry Experience

  Financial Analysis & Control Experience

  Regulatory/Lab Services Reimbursement

  Cybersecurity

Derek J. Maetzold

  Founded Castle Biosciences and has served as our President, CEO and a member of our Board since inception.

  Previously held leadership roles at Encysive Pharmaceuticals, Schering-Plough Corporation (now Merck), Integrated Communications, Amylin Pharmaceuticals and Sandoz Pharmaceuticals (now a division of Novartis).

  Currently serves as a director of PreludeDx and IMPACT Melanoma.

  Holds a B.S. degree in Biology from George Mason University and an MBA from University of California, Riverside.

  Dermatology Specific Experience

  Commercial Execution Experience

  Life Science Industry Experience

  Financial Analysis & Control Experience

  Health System Experience

  R&D Scientific Leadership

  Regulatory/Lab Services Reimbursement

  Cybersecurity

GOVERNANCE HIGHLIGHTS

Our Board is committed to building long-term stockholder value and maintaining sound corporate governance practices. Based on discussions with stockholders and corporate governance best practices, our Board adopted stock ownership guidelines and other governance policies in the first quarter of 2023 to align our corporate governance practices with market practices and investor expectations:

Director Time Commitment Policy. Over the past year, our Nominating and Corporate Governance Committee had robust discussions on the topic of director time commitments and reviewed the policies of peers and other public companies, as well as various institutional policies. Further, as part of our stockholder outreach in 2022, we discussed this topic with many of our investors. Based on this information, and taking into consideration stockholder feedback, our Board adopted a new policy (our “Director Time Commitment Policy”), as outlined below.

A director (who is not also an “officer” (each, a “Section 16 officer” (as defined in Rule 16a-1(f) promulgated under the Securities Exchange Act of 1934, as amended (the “Exchange Act”)), may serve on a total of four (4) public company boards, in addition to our Board, unless approved in advance by our Board.

A director (who also serves as an officer of a public company, including Castle) may serve on a total of two (2) public company boards, in addition to our Board, unless approved in advance by our Board.

All of our directors are not available to us in time to file a Form 8-K within four business days after the Annual Meeting, we intend to file a Form 8-K to publish preliminary results and, within four business days after the final results are known to us, file an additional Form 8-K to publish the final results.

5

Tablecompliance with this policy as of Contents
PROPOSAL 1
ELECTION OF DIRECTORS

Composition of March 31, 2023. More detail is provided under “Information Regarding the Board of Directors and Corporate Governance—Director Time Commitment.”

Clawback Policy. Our Clawback Policy requires us to seek recovery of incentive compensation paid to current or former Section 16 officers in connection with a subsequent financial statement restatement. We intend to revise our Clawback Policy, if necessary, to comply with the requirements of Exchange Act Rule 10D-1 following the release and effectiveness of listing standards adopted by the Nasdaq Stock Market LLC (“Nasdaq”) in accordance with such rule. More detail is provided below under, “Other Compensation Policies and Practices—Clawback Policy” in the “Compensation Discussion and Analysis” section of this Proxy Statement.

6

2023 Proxy Statement

LOGO


Proxy Summary

Stock Ownership Guidelines. Our Section 16 officers and directors are required to maintain a specified level of stock ownership to further align management and stockholder interests. For more information, please see “Other Compensation Policies and Practices—Stock Ownership Guidelines” in the “Compensation Discussion and Analysis” section of this Proxy Statement.

Role

Guideline Multiple

CEO

3x base salary

All other Officers

1x base salary

Directors

3x annual cash retainer

COMPENSATION HIGHLIGHTS

We endeavor to maintain sound executive compensation policies and practices consistent with our executive compensation philosophy. A key priority in 2022 was to gather and address stockholder feedback following our first Say-on-Pay proposal. Highlights of our compensation policy and practices are set forth below:

What We Do

Pay for Performance Philosophy and Culture

Significant Portion of “At-Risk” Executive Compensation is Performance-Based

Independent Compensation Committee

Independent Compensation Advisor Reports Directly to the Compensation Committee

Stock Ownership Guidelines for Directors and Officers

Multi-Year Vesting Requirements for Retention and Long- and Short-Term Alignment

Annual Say-On-Pay Vote

Active Stockholder Outreach

Clawback Policy

Prohibit Hedging or Pledging

Minimize Inappropriate Risk Taking

Competitive Peer Group

What We Don’t Do

No Special Health or Welfare Benefits for Executives

No Excessive Perquisites

No Post-Employment Tax Gross-Ups

No Single-Trigger Acceleration of Equity Awards Upon a Change-in-Control

CASTLE BIOSCIENCES | 2023 Proxy Statement

7


Proposal 1

Election of Directors

Class I Director Nominees for Election for a Three-Year Term Expiring at Castle’s 2026 Annual Meeting of Stockholders

LOGO

Ellen Goldberg

She has served as a member of our board of directors since July 2021. Ms. Goldberg has served as the Founder and President of CHORD Consulting, where she works with executives of innovative diagnostics companies to develop and commercialize novel products since 2011. She has focused her career on ground-breaking technologies in life-threatening and life-altering diseases. From 2009 to 2011, Ms. Goldberg served as Vice President of Marketing at Crescendo Bioscience, developer of Vectra DA®, a multi-biomarker blood test that predicts joint damage and enables treatment changes to improve outcomes in rheumatoid arthritis. Prior to Crescendo, Ms. Goldberg led marketing at Genomic Health, where she launched the Oncotype DX® Breast Cancer Assay and helped develop tests in colon cancer, prostate cancer and ductal carcinoma in situ. Ms. Goldberg began her career as a strategy consultant with Booz Allen & Hamilton and developed new products at ALZA Corporation. She has an M.S in Chemistry and an MBA from Stanford University and a B.S. in Chemistry from Yale University. Ms. Goldberg is also a fellow of the Aspen Institute’s Health Innovators Fellowship Program.

Our Nominating and Corporate Governance Committee and board of directors believe Ms. Goldberg’s expertise in the development and commercialization of diagnostic tests and commercial leadership experience in the diagnostics qualify her to serve on our board of directors.

8

2023 Proxy Statement

LOGO


Proposal 1 Election of Directors

LOGO

Miles D. Harrison

He has served as a member of our board of directors since April 2020. From January 2016 through April 2021, Mr. Harrison served as the North American President and General Manager of Galderma Laboratories, L.P., a global dermatology company. During his tenure at Galderma, Galderma launched multiple brands and new indications across the company’s Prescription, Consumer and Aesthetic businesses. Mr. Harrison also served as Galderma’s Vice President and General Manager of the Consumer Business Unit from August 2014 until February 2016, where the first prescription to OTC switch in acne in more than 30 years was secured and successfully launched. Prior to Galderma, Mr. Harrison spent most of his career at Novartis International AG, a global healthcare company based in Switzerland. From June 1987 to February 2014, Mr. Harrison held multiple leadership positions of increasing responsibility at Novartis across the Consumer, Oncology and Pharmaceuticals businesses, most recently as Vice President and Head of Global Advocacy. Mr. Harrison holds a B.A. (Honors) Degree in Geography from Sheffield Hallam University in the United Kingdom and has worked in the United Kingdom, Europe, Middle East and Latin America, in addition to his U.S.-based roles.

Our Nominating and Corporate Governance Committee and board of directors believe Mr. Harrison’s experience in dermatology and his strategic leadership skills as an executive in the pharmaceutical and consumer healthcare industry qualify him to serve on our board of directors.

LOGO

Tiffany P. Olson

She has served as a member of our board of directors since May 2021. From July 2013 to October 2021, Ms. Olson served as President of Nuclear & Precision Health Solutions at Cardinal Health, Inc., a multinational health care services company. From 2011 to 2013, Ms. Olson served as President of NaviMed, a consulting firm focused exclusively on the healthcare industry. From 2009 to 2011, Ms. Olson served led Diagnostics at Eli Lilly and Company. From 2005 to 2008, Ms. Olson served as the CEO and President of Roche Diagnostics Corporation, where from 1997 to 2005 she held various roles of increasing responsibility. Ms. Olson currently serves on the boards of Langham Logistics, a privately held freight management company, The Education and Research Foundation for Nuclear Medicine and Molecular Imaging, and Telix Pharmaceuticals, a publicly traded biopharmaceutical company on the Australian Securities Exchange. Ms. Olson holds an MBA from the University of St. Thomas, St. Paul, Minnesota, and a Bachelor of Science, Business degree from the University of Minnesota.

Our Nominating and Corporate Governance Committee and board of directors believe that Ms. Olson’s extensive experience in life science and her strategic leadership skills as an executive in the pharmaceutical, diagnostics and health services industry qualify her to serve on our board of directors.

LOGO

The Board of Directors Recommends

a Vote “FOR” Each Named Nominee.

CASTLE BIOSCIENCES | 2023 Proxy Statement

9


Proposal 1 Election of Directors

Class II Directors Continuing in Office Until Castle’s 2024 Annual Meeting of Stockholders

LOGO

Mara G. Aspinall

She has served as a member of our board of directors since February 2015. Ms. Aspinall has served as Managing Director of BlueStone Venture Partners, a life science-focused venture capital firm investing in diagnostics, devices and digital health companies, since December 2017. Since June 2014, Ms. Aspinall has served as the President and CEO of Health Catalysts Group, a consulting firm that focuses on growth of early-stage life science and technology companies. From September 2011 until June 2014, Ms. Aspinall served as the President and CEO of the Ventana Medical Systems and the Global Head of Roche Tissue Diagnostics, a global leader in the development and commercialization of tissue-based cancer diagnostics. Prior to 2011, Ms. Aspinall served as President of Genzyme Pharmaceuticals and Genzyme Genetics. Ms. Aspinall currently serves as a director of OraSure Technologies, Inc., a publicly traded medical device manufacturer; Abcam, a publicly traded life sciences tools company; DA32 Life Science Tech Acquisition Corp., a public special purpose acquisition corporation focused on funding life science technologies; along with other privately held healthcare technology and medical insurance companies. Ms. Aspinall holds a B.A. degree in International Relations from Tufts University and an MBA from Harvard Business School. Ms. Aspinall is also certified in Cybersecurity Oversight from Carnegie Mellon University.

Our Nominating and Corporate Governance Committee and board of directors believe that Ms. Aspinall’s operational expertise, international experience, diagnostics industry and cybersecurity knowledge qualify her to serve on our board of directors.

LOGO

Daniel M. Bradbury

He has served as a member of our board of directors since September 2012, and as chair of our board of directors since September 2014. Since January 2020, Mr. Bradbury has served as Executive Chairman of Equillium, Inc., a publicly traded biotechnology company, that he co-founded and also served as its CEO from June 2018 until December 2019 and President from March 2017 until June 2018. Mr. Bradbury is the founder of, and has served as the managing member of, BioBrit, LLC, a life sciences consulting and investment firm, since September 2012. Mr. Bradbury served as President, CEO and a director of Amylin Pharmaceuticals, Inc. from March 2007 until Amylin’s acquisition by Bristol-Myers Squibb Company in August 2012. Prior to Amylin, Mr. Bradbury worked in marketing and sales for ten years at SmithKline Beecham Pharmaceuticals. Mr. Bradbury serves on the board of privately held companies and two publicly traded companies, Equillium, Inc. and Intercept Pharmaceuticals, Inc., each a biopharmaceutical company. He previously served on the board of directors of the following publicly traded companies: Corcept Therapeutics, Inc., a pharmaceutical company, from 2012 to 2019; Biocon Limited, a biotechnology company, from 2013 to 2022 and Geron Corporation, a biotechnology company, from 2012 to 2019; and Illumina, Inc., a biotechnology company, from 2004 to 2017. Mr. Bradbury holds a Bachelor of Pharmacy from Nottingham University and a Diploma in Management Studies from Harrow and Ealing Colleges of Higher Education in the United Kingdom.

Our Nominating and Corporate Governance Committee and board of directors believe that Mr. Bradbury’s extensive experience as a life sciences executive and his other executive and boards of directors experience qualify him to serve on our board of directors.

10

2023 Proxy Statement

LOGO


Proposal 1 Election of Directors

Class III Directors Continuing in Office Until Castle’s 2025 Annual Meeting of Stockholders

LOGO

Kimberlee S. Caple

She has served as a member of our board of directors since July 2021. She is currently President, Genetic Analysis Division at Thermo Fisher Scientific Inc. From mid-2020 through January 2022, Ms. Caple was the Vice President and General Manager of the Genetics Sciences Business (“GSB”), a part of the Genetic Sciences Division within Thermo Fisher Scientific. From 2017 through mid-2020, Ms. Caple was the Vice President and General Manager for the Capillary Electrophoresis Business Unit, a part of the GSB. The GSB is made up of three business units which develop, manufacture and commercializes genetic analysis tools and solutions that serve the healthcare, forensic, research and pharmaceutical/biotechnology markets globally. Ms. Caple has a B.S. degree in Biology from Purdue University.

Our Nominating and Corporate Governance Committee and board of directors believe that Ms. Caple’s extensive experience and strategic leadership skills as a life science and clinical diagnostic executive qualify her to serve on our board of directors.

LOGO

G. Bradley Cole

He has served as a member of our board of directors since December 2018. From November 2019 until April 2020, Mr. Cole served as General Manager, Precision Oncology, a unit of Exact Sciences Corporation, a molecular diagnostics company, following Exact Science Corporation’s acquisition of Genomic Health, Inc., a global provider of genomic-based diagnostic tests. From June 2004 to November 2019, Mr. Cole served as Chief Financial Officer of Genomic Health, where he also served as Chief Operating Officer from January 2009 until March 2018. Mr. Cole previously held Chief Financial Officer positions at multiple publicly traded companies, including Applied Biosystems, Inc. Mr. Cole holds a B.S. degree in Accounting from Biola University and an MBA from San Jose State University.

Our Nominating and Corporate Governance Committee and board of directors believe that Mr. Cole’s extensive experience in finance and operations as a public company executive and knowledge of the diagnostics industry qualify him to serve on our board of directors.

CASTLE BIOSCIENCES | 2023 Proxy Statement

11


Proposal 1 Election of Directors

LOGO

Derek J. Maetzold

He founded Castle Biosciences in September 2007 and has served as our President, CEO and as a member of our board of directors since inception. Previously, Mr. Maetzold held leadership roles at Encysive Pharmaceuticals, Schering-Plough Corporation (now Merck), Integrated Communications, Amylin Pharmaceuticals and Sandoz Pharmaceuticals (now a division of Novartis). Mr. Maetzold currently serves as a director of PreludeDx, a privately held molecular diagnostics and precision medicine company focused on early-stage breast cancer, and IMPACT Melanoma, a non-profit organization dedicated to skin cancer prevention and early detection. He has contributed to the discovery, development and commercialization of five diagnostic and prognostic tests in cancers, has co-authored multiple scientific publications and is a co-inventor of a number of technologies at Castle Biosciences and Encysive Pharmaceuticals. Mr. Maetzold holds a B.S. degree in Biology from George Mason University and completed additional coursework at the University of Calgary Health Sciences Center and the MBA program at the University of California, Riverside.

Our Nominating and Corporate Governance Committee and board of directors believe that Mr. Maetzold’s experience as our founder, director and as our President and CEO, as well as his expertise in the development and commercialization of diagnostic tests, qualify him to serve on our board of directors.

12

2023 Proxy Statement

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Information Regarding the Board of Directors and Corporate Governance

COMPOSITION OF THE BOARD OF DIRECTORS

Castle’s board of directors is divided into three classes. Each class consists, as nearly as possible, of one-third of the total number of directors, and each class has a three-year term. Vacancies on the board of directors, including newly created directorships, may be filled only by persons elected by a majority of directors then in office. A director elected by the board of directors to fill a vacancy in a class, including vacancies created by an increase in the number of directors, shall serve for the remainder of the full term of that class until the director’s successor is duly elected and qualified.

The board of directors currently has eight members. There are three directors in the class whose term of office expires in 20222023 and have been nominated for reelection at the Annual Meeting: Kimberlee S. Caple, G. Bradley ColeEllen Goldberg, Miles D. Harrison and Derek J. Maetzold.Tiffany P. Olson. Proxies may not be voted for a greater number of persons than the number of nominees named in this Proxy Statement. Each of the nominees listed below is currently a director of the Company. If elected at the Annual Meeting, each of these nominees would serve until the 20252026 annual meeting of stockholders and until his or her successor has been duly elected and qualified, or, if sooner, until the director’s death, resignation or removal.

Directors are elected by a plurality of the votes of the holders of shares present in person or represented by proxy and entitled to vote on the election of directors. Accordingly, the three nominees receiving the highest number of “FOR” votes will be elected. Shares represented by executed proxies will be voted, if authority to do so is not withheld, “FOR” the election of the three nominees named below. If any nominee becomes unavailable for election as a result of an unexpected occurrence, shares that would have been voted for that nominee will instead be voted for the election of a substitute nominee proposed by Castle. Each person nominated for election has agreed to serve if elected. The Company’s management has no reason to believe that any nominee will be unable to serve. The following table sets forth information with respect to the three Class IIII director nominees for election at the Annual Meeting and our other directors who will continue in office after the Annual Meeting, as of April 21, 2022:12, 2023:

Name

  Independent  Committees  Age  Director
Since

Class I Directors1

Ellen Goldberg

  Yes  

  Compensation Committee

 

  Nominating and Corporate Governance Committee

  49  2021

Miles D. Harrison

  Yes  

  Compensation Committee (Chair)

 

  Nominating and Corporate Governance Committee

  58  2020

Tiffany P. Olson

  Yes  

  Audit Committee

 

  Compensation Committee

  63  2021

Class II Directors2

Mara G. Aspinall

  Yes  

  Audit Committee

 

  Nominating and Corporate Governance Committee (Chair)

  60  2015

Daniel M. Bradbury (Chair)

  Yes  

  None

  61  2012

Class III Directors3

Kimberlee S. Caple

  Yes  

  Audit Committee

 

  Nominating and Corporate Governance Committee

  61  2021

G. Bradley Cole

  Yes  

  Audit Committee (Chair)

 

  Compensation Committee

  67  2018

Derek J. Maetzold

  No  

  None

  61  2007

(1)

Nominees for Election at the Annual Meeting

(2)

Continuing in Office until the 2024 Annual Meeting of Stockholders

(3)

Continuing in Office until the 2025 Annual Meeting of Stockholders

CASTLE BIOSCIENCES | 2023 Proxy Statement

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NamePosition with the CompanyAgeDirector Since
Class III Directors - Nominees for Election at the Annual Meeting
Kimberlee S. CapleDirector602021
G. Bradley ColeDirector662018
Derek J. MaetzoldPresident, Chief Executive Officer and Director602007
Class I Directors - Continuing in Office until the 2023 Annual Meeting of Stockholders
Ellen GoldbergDirector482021
Miles D. HarrisonDirector572020
Tiffany P. OlsonDirector622021
Class II Directors - Continuing in Office until the 2024 Annual Meeting of Stockholders
Mara G. AspinallDirector592015
Daniel M. BradburyChairperson of the Board of Directors612012
Set forth below is biographical information for

Information Regarding the Class III director nomineesBoard of Directors and each person whose termCorporate Governance

EXPERIENCE AND ATTRIBUTES OF THE BOARD OF DIRECTORS

Our directors have a broad set of officeskills and experience that we believe facilitates strong oversight and provides strategic direction to our business.

Board Qualifications & Attributes Matrix (as of April 12, 2023)

              Class I Directors                  Class II Directors    Class III Directors
Ellen
Goldberg
Miles D.
Harrison
Tiffany P.
Olson
Mara G.
Aspinall
Daniel M.
Bradbury,
Chair
Kimberlee
S. Caple
G. Bradley
Cole
Derek J.
Maetzold

Dermatology Specific Experience

Commercial Execution Experience

Life Science Industry Experience

Financial Analysis & Control Experience

Digital Health

Health System (HE) Experience

R&D Scientific Leadership

Regulatory/Lab Services Reimbursement

Diverse Board Member (Gender or Ethnic/Racial)

Cybersecurity

DIRECTOR TIME COMMITMENT

Our Board seeks candidates who it believes will be able to devote sufficient time and attention to serve as a director, will continue after the Annual Meeting. This includes information regardingtaking into account each director’s experience, qualifications, attributes or skills that led our boardcandidate’s principal occupation, service on other boards of directors, and, for incumbent directors who are being considered for reelection, attendance and performance at Castle’s Board and committee meetings.

Over the past year, our Nominating and Corporate Governance Committee had robust discussions on the topic of director time commitments and reviewed the policies of peers and other public companies, as well as various institutional policies. Further, as part of our stockholder outreach in 2022, we discussed this topic with many of our investors. Based on this information, and taking into consideration stockholder feedback, our Board adopted a Director Time Commitment Policy, as outlined below.

A director (who is not also a Section 16 officer of a public company, including Castle) may serve on a total of four (4) public company boards, in addition to our Board, unless approved in advance by the Board.

A director (who also serves as a Section 16 officer an officer of a public company, including Castle) may serve on a total of two (2) public company boards, in addition to our Board, unless approved in advance by our Board.

Our policy requires non-employee directors to recommend them for service on our board of directors.

Board Diversity
Ournotify the Nominating and Corporate Governance Committee if they:

retire from their principal occupation;

change the position they held when they became a member of the Board; or

join the board of directors of a private or public company.

All of our directors are in compliance with this policy as of March 31, 2023.

CRITERIA FOR BOARD MEMBERSHIP

The Nominating and Corporate Governance Committee assesses many characteristics and diversity considerations when reviewing director candidates. One of our top priorities is ensuring that the diversity and skill set of our current and future Board members supports our current and long-term plans.

The factors considered by the Nominating and Corporate Governance Committee include whether the directors, both individually and collectively, can and do provide the integrity, experience, judgment, commitment (including having sufficient time to Castle), skills, diversity and expertise appropriate for Castle.

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2023 Proxy Statement

LOGO


Information Regarding the Board of Directors and Corporate Governance

We believe that the backgrounds and qualifications of our directors, considered as a group, should consist of a significant composite mix of experience, knowledge and abilities that will allow the Board to fulfill its responsibilities and should represent an appropriate balance between institutional knowledge and fresh perspectives.

BOARD STRUCTURE

The Board believes there is no single approach to corporate governance that is appropriate for all companies, and the key consideration in determining whether to implement a particular governance practice is whether that practice promotes the interests of stockholders, taking into account a company’s specific circumstances. The Board has reviewed the rationale for its current classified structure and continues to believe that a classified board is the appropriate board structure for Castle at this time and is in the best interest of our stockholders for the reasons set forth below:

Long-Term Focus. The Board believes that a classified board encourages directors to look to the long-term best interest of Castle and our stockholders by strengthening the independence of non-employee directors against the often short-term focus of certain stockholders and special interests.

Continuity of Board Leadership. A classified board allows for a greater amount of stability and continuity, providing institutional perspective and knowledge both to management and other directors in a time of rapid growth. In addition, the development and commercialization of diagnostics is complex and requires significant expertise. By its very nature, a classified board ensures that at any given time there will be experienced directors serving on our Board who are fully immersed in and knowledgeable about our highly technical business, including our relationships with our current and potential strategic partners, as well as the competition, opportunities, risks and challenges that exist in the industry. Each year the Nominating and Corporate Governance Committee reviews the qualifications and performance of the directors prior to nominating them for re-election. We believe the benefit of a classified board to the Company and our stockholders comes not from continuity alone—but rather from the continuity of highly qualified, engaged and knowledgeable directors focused on long-term stockholder interests.

Unsolicited Takeover Protection. A classified board can reduce vulnerability to potential abusive takeover tactics by encouraging persons seeking control of the Company to negotiate with the Board, thereby strengthening the Board’s ability to negotiate effectively on behalf of all stockholders. Because less than a majority of directors stand for election at each annual meeting under a classified board structure, a hostile bidder could not simply replace a majority of the Board at a single annual meeting with directors aligned with the hostile bidder’s own interests. Rather, in the interests of fairness to stockholders as a whole, having a classified board encourages the hostile bidder to negotiate directly with the Board on a potential transaction.

In summary, we believe the Company has benefited from the independence and continuity of experienced leadership provided by our Board under its classified structure. We will continue to assess our Board’s structure, consider stockholder feedback and make changes when appropriate.

BOARD DIVERSITY

Our Board considers diversity, including gender and ethnic diversity, as adding to the overall mix of perspectives of our board of directors as a whole. With the assistance of the Nominating and Corporate Governance Committee, our board of directors regularly reviews trends in board composition, including on director diversity. The following Board Diversity Matrix presents our board of directors’ diversity statistics in accordance with Nasdaq Global Market (“Nasdaq”) Listing Rule 5606, of the Nasdaq listing rules, as self-disclosed by our directors.

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Board Diversity Matrix as of April 21, 202212, 2023

Total Number of Directors

  8
    Female        Male        

Did Not Disclose      

Gender      

Part I: Gender Identity

         

Directors

  4        3        1      

Part II: Demographic Background

         

White

  4        3        —      

Did Not Disclose Demographic Background

  1

CASTLE BIOSCIENCES | 2023 Proxy Statement

15



Total Number of Directors8
FemaleMaleNon-BinaryDid Not Disclose Gender
Part I: Gender Identity
Directors44— — 
Part II: Demographic Background
African American or Black— — — — 
Alaskan Native or Native American— — — — 
Asian— — — — 
Hispanic or Latinx— — — — 
Native Hawaiian or Pacific Islander— — — — 
White— — 
Two or More Races or Ethnicities— — — — 
LGBTQ+
Did Not Disclose Demographic Background1
Class III

Information Regarding the Board of Directors Nominees for Election for a Three-Year Term Expiring at Castle’s 2025 Annual Meeting of Stockholders

Kimberlee S. Caple has served as a member of board of directors since July 2021. She is currently President, Genetic Analysis Division at Thermo Fisher Scientific Inc. From mid-2020 through January 2022, Ms. Caple was the Vice President and General Manager of the Genetics Sciences Business (“GSB”), a part of the Genetic Sciences Division within Thermo Fisher Scientific. From 2017 through mid-2020, Ms. Caple was the Vice President and General Manager for the Capillary Electrophoresis Business Unit, a part of the GSB. The GSB is made up of three business units which develop, manufacture and commercializes genetic analysis tools and solutions that serve the healthcare, forensic, research and pharmaceutical / biotechnology markets globally. Ms. Caple has a B.S. degree in Biology from Purdue University.
Corporate Governance

Our Nominating and Corporate Governance Committee is responsible for assessing the appropriate balance of integrity, experience, judgment, commitment (including having sufficient time to devote to the Company and boardlevel of directors believe that Ms. Caple’s extensive experienceparticipation), skills, diversity and strategic leadership skills as a life science and clinical diagnostic executive qualify her to serve on our boardexpertise required of directors.

G. Bradley Cole has served as a member of our board of directors since December 2018. From November 2019 until April 2020, Mr. Cole served as General Manager, Precision Oncology, a unit of Exact Sciences Corporation, a molecular diagnostics company, following Exact Science Corporation’s acquisition of Genomic Health, Inc., a global provider of genomic-based diagnostic tests. From June 2004 to November 2019, Mr. Cole served as Chief Financial Officer of Genomic Health, where he also served as Chief Operating Officer from January 2009 until March 2018. Mr. Cole previously held Chief Financial Officer positions at multiple publicly traded companies, including Applied Biosystems, Inc. Mr. Cole holds a B.S. degree in Accounting from Biola University and an MBA from San Jose State University.
Ourthe Board. In this regard, the Nominating and Corporate Governance Committee identifies and board of directors believe that Mr. Cole’s extensive experience in finance and operations as a public company executive qualify himevaluates individuals qualified to serve on our board of directors.
Derek J. Maetzold founded Castle Biosciences in September 2007as Board members, including evaluating incumbent directors for re-election, and has served as our President, Chief Executive Officer and as a member of our board of directors since inception. Previously, Mr. Maetzold held leadership roles at Encysive Pharmaceuticals, Schering-Plough Corporation (now Merck), Integrated Communications, Amylin Pharmaceuticals and Sandoz Pharmaceuticals (now a division of Novartis). Mr. Maetzold currently serves as a director of AltheaDx, Inc., a privately held commercial-stage molecular diagnostics company focused on mental health, PreludeDx™, a privately held molecular diagnostics and precision medicine company focused on early-stage breast cancer, the Ocular Melanoma Foundation, a non-profit organization focused on eye cancer research funding and patient/caregiver support, and IMPACT Melanoma, a non-profit organization dedicated to skin cancer prevention and early detection. He has contributedrecommends to the discovery, development and commercialization of five diagnostic and prognostic tests in cancers, has co-authored multiple scientific publications and is a co-inventor of a number of technologies at Castle Biosciences and Encysive Pharmaceuticals. Mr. Maetzold holds a B.S. degree in Biology from George Mason University and completed additional coursework at the University of Calgary Health Sciences Center and the MBA program at the University of California, Riverside.
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OurBoard nominees for election as directors. The Nominating and Corporate Governance Committee and board of directors believe that Mr. Maetzold’s experience as our founder, director and as our President and Chief Executive Officer, as well as his expertise in the development and commercialization of diagnostic tests, qualify him to serve on our board of directors.
The Board of Directors Recommends
a Vote “FOR” Each Named Nominee.

Class I Directors Continuing in Office Until Castle’s 2023 Annual Meeting of Stockholders
Ellen Goldberg has served as a member of our board of directors since July 2021. Ms. Goldberg is the Founder and President of CHORD Consulting, where she works with executives of innovative diagnostics companies to develop and commercialize novel products. She has focused her career on ground-breaking technologies in life-threatening and life-altering diseases. Previously, Ms. Goldberg was Vice President of Marketing at Crescendo Bioscience, where she helped launch Vectra DA®, a multi-biomarker blood test that enables treatment changes to improve outcomes in rheumatoid arthritis. Prior to Crescendo, Ms. Goldberg led marketing at Genomic Health, where she helped launch the Oncotype DX® Breast Cancer Assay and helped develop tests in colon cancer, prostate cancer and ductal carcinoma in situ. Ms. Goldberg began her career as a strategy consultant with Booz Allen & Hamilton and developed new products at ALZA Corporation. She hasalso oversees an M.S in Chemistry and an MBA from Stanford University and a B.S. in Chemistry from Yale University. Ms. Goldberg is also a fellow of the Aspen Institute’s Health Innovators Fellowship Program.
Our Nominating and Corporate Governance Committee and board of directors believe Ms. Goldberg’s expertise in the development and commercialization of precision diagnostic tests and commercial leadership experience in the diagnostics qualify her to serve on our board of directors.
Miles D. Harrison has served as a member of our board of directors since 2020. From 2016 through 2021, Mr. Harrison served as the North American President and General Manager of Galderma Laboratories, L.P., a global dermatology company. During his tenure at Galderma, Galderma launched multiple brands and new indications across the company’s Prescription, Consumer and Aesthetic businesses. Mr. Harrison also served as Galderma’s Vice President and General Manager of the Consumer Business Unit from August 2014 until February 2016, where the first prescription to OTC switch in acne in more than 30 years was secured and successfully launched. Prior to Galderma, Mr. Harrison spent most of his career at Novartis International AG, a global healthcare company based in Switzerland. From June 1987 to February 2014, Mr. Harrison held multiple leadership positions of increasing responsibility at Novartis across the Consumer, Oncology and Pharmaceuticals businesses, most recently as Vice President and Head of Global Advocacy. Mr. Harrison holds a B.A. (Honors) Degree in Geography from Sheffield Hallam University in the United Kingdom and has worked in the United Kingdom, Europe, Middle East and Latin America, in addition to his U.S.-based roles.
Our Nominating and Corporate Governance Committee and board of directors believe Mr. Harrison’s experience in dermatology and his strategic leadership skills as an executive in the pharmaceutical and consumer healthcare industry qualify him to serve on our board of directors.
Tiffany P. Olson has served as a member of our board of directors since May 2021. From 2013 to October 2021, Ms. Olson served as President of Nuclear & Precision Health Solutions at Cardinal Health, Inc., a multinational health care services company. From 2011 to 2013, Ms. Olson served as President of NaviMed, a consulting firm focused exclusively on the healthcare industry. From 2009 to 2011, Ms. Olson served as the Head of Diagnostics at Eli Lilly and Company. From 2005 to 2008, Ms. Olson served as the Chief Executive Officer and President of Roche Diagnostics Corporation, where from 1997 to 2005 she held various roles of increasing responsibility. Ms. Olson currently serves on the boards of Langham Logistics, a privately held freight management company, The Education and Research Foundation for Nuclear Medicine and Molecular Imaging, and Telix Pharmaceuticals, a publicly traded biopharmaceutical company on the Australian Securities Exchange. Ms. Olson holds an MBA from the University of St. Thomas, St. Paul, Minnesota, and a Bachelor of Science, Business degree from the University of Minnesota.
Our Nominating and Corporate Governance Committee and board of directors believe that Ms. Olson’s extensive experience in life science and her strategic leadership skills as an executive in the pharmaceutical and consumer healthcare industry qualify her to serve on our board of directors.
Class II Directors Continuing in Office Until Castle’s 2024 Annual Meeting of Stockholders
Mara G. Aspinall has served as a member of our board of directors since February 2015. Ms. Aspinall has served as Managing Director of BlueStone Venture Partners, a life science-focused venture capital firm, since December 2017. Since June 2014, Ms. Aspinall has served as the President and Chief Executive Officer of Health Catalysts Group, a consulting firm that focuses on growth of early-stage life science and technology companies. From September 2011 until June 2014, Ms. Aspinall served as the President and Chief Executive Officer of the Ventana Medical Systems and the Global Head of Roche Tissue Diagnostics, a global leader in the development and commercialization of tissue-based cancer diagnostics. Prior to 2011, Ms. Aspinall served as President of Genzyme Pharmaceuticals and Genzyme Genetics. Ms. Aspinall currently serves as a director of Allscripts Healthcare Solutions, Inc., a publicly traded healthcare IT solutions company; OraSure Technologies, Inc., a publicly traded medical device manufacturer; Abcam plc, a
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publicly traded life sciences technology company based in the United Kingdom; Da32 Life Science Tech Acquisition Corp., a public special purpose acquisition corporation focused on funding life science technologies; along with other privately held healthcare technology and medical insurance companies. Ms. Aspinall holds a B.A. degree in International Relations from Tufts University and an MBA from Harvard Business School. Ms. Aspinall is also certified in Cybersecurity Oversight from Carnegie Mellon University.
Our Nominating and Corporate Governance Committee and board of directors believe that Ms. Aspinall’s operational expertise, international experience and digital health knowledge qualify her to serve on our board of directors.
Daniel M. Bradbury has served as a member our board of directors since September 2012, and as chairperson of our board of directors since September 2014. Since January 2020, Mr. Bradbury has served as Executive Chairman of Equillium, Inc., a publicly traded biotechnology company, that he co-founded and also served as its Chief Executive Officer from June 2018 until December 2019 and President from March 2017 until June 2018. Mr. Bradbury is the founder of, and has served as the managing member of, BioBrit, LLC, a life sciences consulting and investment firm, since September 2012. Mr. Bradbury served as President, Chief Executive Officer and a director of Amylin Pharmaceuticals, Inc. from March 2007 until Amylin’s acquisition by Bristol-Myers Squibb Company in August 2012. Prior to Amylin, Mr. Bradbury worked in marketing and sales for ten years at SmithKline Beecham Pharmaceuticals. Mr. Bradbury serves on the board of directors of numerous privately held companies and two publicly traded companies, Equillium, Inc. and Intercept Pharmaceuticals, Inc., each a biopharmaceutical company. He previously served on the board of directors of the following publicly traded companies: Corcept Therapeutics, Inc., a pharmaceutical company, from 2012 to 2019; Geron Corporation, a biotechnology company, from 2012 to 2019; and Illumina, Inc., a biotechnology company, from 2004 to 2017. Mr. Bradbury holds a Bachelor of Pharmacy from Nottingham University and a Diploma in Management Studies from Harrow and Ealing Colleges of Higher Education in the United Kingdom.
Our Nominating and Corporate Governance Committee and board of directors believe that Mr. Bradbury’s extensive experience as a life sciences executive and his other executive and boards of directors experience qualify him to serve on our board of directors.
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INFORMATION REGARDING THE BOARD OF DIRECTORS AND CORPORATE GOVERNANCE
Director Independence
annual Board self-evaluation process.

DIRECTOR INDEPENDENCE

Our common stock is listed on the Nasdaq Global Market (“Nasdaq”).Nasdaq. Under the listing requirements and rules of Nasdaq, independent directors must comprise a majority of our board of directors. In addition, the rules of Nasdaq require that, subject to specified exceptions, each member of a listed company’s audit, compensation and nominating and corporate governance committees be independent. Under Nasdaq listing rules, a director will only qualify as an “independent director” if the listed company’s board of directors makes an affirmative determination that person does not have a relationship that would interfere with the exercise of independent judgment in carrying out the responsibilities of a director. Compensation committee members must not have a relationship with us that is material to the director’s ability to be independent from management in connection with the duties of a compensation committee member. Additionally, audit committee members must also satisfy the independence criteria set forth in Rule 10A-3 under the Exchange Act. To be considered independent for purposes of Rule 10A-3, a member of an audit committee of a listed company may not, other than in his or her capacity as a member of the audit committee, the board of directors or any other board committee, accept, directly or indirectly, any consulting, advisory or other compensatory fee from the listed company or any of its subsidiaries or be an affiliated person of the listed company or any of its subsidiaries.

Our board of directors has undertaken a review of the independence of the directors and considered whether any director has a material relationship with us that could compromise his or her ability to exercise independent judgment in carrying out his or her responsibilities. Based upon information requested from and provided by each director concerning such director’s background, employment and affiliations, including family relationships, our board of directors determined that Ms. Aspinall, Mr. Bradbury, Ms. Caple, Mr. Cole, Ms. Goldberg, Mr. Harrison and Ms. Olson, representing seven of our eight directors, are each “independent directors” as defined under current rules and regulations of the SEC and the listing standards of the Nasdaq. In making these determinations, our board of directors considered the current and prior relationships that each non-employee director has with our company and all other facts and circumstances that our board of directors deemed relevant in determining their independence, including the beneficial ownership of our capital stock by each non-employee director and the transactions involving them described in “Transactions with Related Persons and Indemnifications—Certain Related Person Transactions.”

Leadership Structure
Our

LEADERSHIP STRUCTURE

The chair of our board of directors (the “Chair”) is currently chaired by Mr. Bradbury, who has authority, among other things, to call and preside over meetings of the board of directors, to set meeting agendas and to determine materials to be distributed to the board of directors. Accordingly, the ChairpersonChair has substantial ability to shape the work of the board of directors. We believe that separation of the positions of ChairpersonChair and Chief Executive OfficerCEO reinforces the independence of the board of directors in its oversight of our business and affairs. In addition, we have a separate chair for each committee of our board of directors. The chairpersonchair of each committee is expected to report annually to our board of directors on the activities of their committee in fulfilling their responsibilities as detailed in their respective charters or specify any shortcomings should that be the case.

Role

MEETINGS OF THE BOARD OF DIRECTORS

The board of directors met 13 times and acted by unanimous written consent six times during 2022. All directors attended at least 75% of the Boardaggregate number of Directorsmeetings of the board of directors and of the committees on which they served, held during the portion of the last fiscal year for which they were a director or committee member.

It is the Company’s policy to encourage directors and nominees for director to attend our annual meeting of stockholders. All of our directors serving at the time attended the annual meeting of stockholders in Risk Oversight

2022, with the exception of Ms. Olson.

ROLE OF THE BOARD OF DIRECTORS IN RISK OVERSIGHT

The Audit Committee is primarily responsible for overseeing our risk management processes on behalf of our board of directors. The Audit Committee receives reports from management periodically regarding our assessment of risks. In addition, the Audit Committee reports regularly to our board of directors, which also considers our risk profile. The Audit Committee and our board of directors focus on the most significant risks we face and our general risk management strategies. The Compensation Committee evaluates risks associated with and potential consequences of our compensation policies and practices and assesses

16

2023 Proxy Statement

LOGO


Information Regarding the Board of Directors and Corporate Governance

whether such risks and consequences as may be mitigated by any other compensation policies and practices, are reasonably likely to have a material adverse effect on the Company. While our board of directors oversees our risk management, management is responsible for day-to-day risk management processes. Our board of directors expects management to consider risk and risk management in each business decision, to proactively develop and monitor risk management strategies and processes for day-to-day activities and to effectively implement risk management strategies adopted by the Audit Committee and our board of directors. We believe this division of responsibilities is the most effective approach for addressing the risks we face and that our board of directors’ leadership structure, which also emphasizes the independence of our board of directors in its oversight of its business and affairs, supports this approach.

Meetings of the Board of Directors
The board of directors met 17 times and acted by unanimous written consent four times during 2021. All directors attended at least 75% of the aggregate number of meetings of the board of directors and of the committees on which they served, held during the portion of the last fiscal year for which they were a director or committee member.
It is the Company’s policy to encourage directors and nominees for director to attend our annual meeting of stockholders. All of our directors serving at the time attended the annual meeting of stockholders in 2021, with the exception of Ms. Olson.
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Information Regarding Committees of the Board of Directors

INFORMATION REGARDING COMMITTEES OF THE BOARD OF DIRECTORS

Our board of directors has established an Audit Committee, a Compensation Committee and a Nominating and Corporate Governance Committee. The following table provides currentthe membership of each such committee membershipas of the date of this Proxy Statement and meeting information forthe total number of committee meetings held during the fiscal year ended December 31, 2021:

AuditCompensationNominating and Corporate Governance
Mara G. AspinallMC
Daniel M. Bradbury
Kimberlee S. CapleMM
G. Bradley ColeCM
Ellen GoldbergMM
Miles D. HarrisonCM
Derek J. Maetzold
Tiffany P. OlsonMM
Total meetings in 2021684
2022:

    Audit  Compensation  Nominating
and
Corporate
Governance

Mara G. Aspinall

  M    C

Daniel M. Bradbury

      

Kimberlee S. Caple

  M    M

G. Bradley Cole

  C  M  

Ellen Goldberg

    M  M

Miles D. Harrison

    C  M

Derek J. Maetzold

      

Tiffany P. Olson

  M  M  

Total meetings in 2022

  4  6  4

C = Committee Chairperson

Chair

M = Committee Member


Effective May 8, 2021, the board of directors appointed Ms. Olson to the Audit Committee. Effective August 5, 2021, the board of directors appointed Ms. Caple to the Audit Committee and the Nominating and Corporate Governance Committee; Ms. Goldberg to the Compensation Committee and the Nominating and Corporate Governance Committee; Mr. Harrison as the Chairperson of the Compensation Committee; appointed Ms. Olson to the Compensation Committee. Prior to his resignation from the board of directors on May 8, 2021, Joseph C. Cook III served as a member of the Audit Committee and the Nominating and Corporate Governance Committee. Prior to his resignation from the board of directors on August 5, 2021, David Kabakoff, Ph.D. served as the Chairperson of the Compensation Committee and a member of the Nominating and Corporate Governance Committee.

Each of the committees has authority to engage legal counsel or other experts or consultants, as it deems appropriate to carry out its responsibilities. The board of directors has affirmatively determined that each member of each committee meetssatisfies the applicable independence requirements of the U.S. Securities and Exchange Commission (“SEC”) and Nasdaq rules and regulations regarding “independence” and each member is free of any relationship that would impair his or her individual exercise of independent judgment with regard to the Company.

Below is a description of each committee of the board of directors.

Audit Committee

Our Audit Committee consists of G. Bradley Cole, Mara G. Aspinall, Kimberlee S. Caple and Tiffany P. Olson. Our board of directors has determined that each of the membersmember of our Audit Committee satisfies the Nasdaqapplicable SEC and SECNasdaq independence requirements. The board of directors reviewsevaluates the Nasdaq listing rules definitionindependence of independence for Audit Committee members on an annual basis and has determined that all members of the Company’sour Audit Committee are independent (assatisfy the independence is currently definedcriteria set forth in Rule 10A-3(b)(1) promulgated under the Exchange Act and Nasdaq Listing Rule 5605(c)(2)(A)(i) and (ii) of the Nasdaq listing rules). Mr. Cole serves as the ChairpersonChair of our Audit Committee. The Audit Committee met sixfour times during the last fiscal year. The board of directors has adopted a written Audit Committee Charter that is available to stockholders on the Company’s website at www.CastleBiosciences.com on the “Investors” page under “Corporate Governance.”The functions of this committee include, among other things:

evaluating the performance, independence and qualifications of our independent auditors and determining whether to retain our existing independent auditors or engage new independent auditors;

reviewing and approving the engagement of our independent auditors to perform audit services and any permissible non-audit services;

monitoring the rotation of partners of our independent auditors on our engagement team as required by law;

CASTLE BIOSCIENCES | 2023 Proxy Statement

17


evaluating

Information Regarding the performance, independenceBoard of Directors and qualifications of our independent auditors and determining whether to retain our existing independent auditors or engage new independent auditors;

reviewing and approving the engagement of our independent auditors to perform audit services and any permissible non-audit services;
monitoring the rotation of partners of our independent auditors on our engagement team as required by law;
prior to engagement of any independent auditor, and at least annually thereafter, reviewing relationships that may reasonably be thought to bear on their independence, and assessing and otherwise taking the appropriate action to oversee the independence of our independent auditor;
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reviewing our annual and quarterly financial statements and reports, including the disclosures contained under the caption “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” and discussing the statements and reports with our independent auditors and management;
reviewing, with our independent auditors and management, significant issues that arise regarding accounting principles and financial statement presentation and matters concerning the scope, adequacy and effectiveness of our financial controls;
reviewing with management and our independent auditors any earnings announcements and other public announcements regarding material developments;
establishing procedures for the receipt, retention and treatment of complaints received by us regarding financial controls, accounting or auditing matters and other matters;
preparing the report that the SEC requires in our annual proxy statement;
reviewing and providing oversight of any related-person transactions in accordance with our related person transaction policy;
reviewing and monitoring compliance with legal and regulatory responsibilities, including any material reports or inquiries from regulatory or governmental agencies and our code of business conduct and ethics;
reviewing our major risk exposures, including our major financial risk exposures, and reviewing the implementation of guidelines and policies to identify, monitor and control exposures to strategic, financial, operational, regulatory, cyber security and other risks inherent in our business;
reviewing on a periodic basis our investment policy;
reviewing and providing oversight of our environmental, social and governance (“ESG”) program; and
reviewing and evaluating on an annual basis the performance of the Audit Committee and the Audit Committee Charter.
Corporate Governance

prior to engagement of any independent auditor, and at least annually thereafter, reviewing relationships that may reasonably be thought to bear on their independence, and assessing and otherwise taking the appropriate action to oversee the independence of our independent auditor;

reviewing our annual and quarterly financial statements and reports, including the disclosures contained under the caption “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” and discussing the statements and reports with our independent auditors and management;

reviewing, with our independent auditors and management, significant issues that arise regarding accounting principles and financial statement presentation and matters concerning the scope, adequacy and effectiveness of our financial controls;

reviewing with management and our independent auditors, as appropriate, the adequacy and effectiveness of our cybersecurity policies;

reviewing with management and our independent auditors any earnings announcements and other public announcements regarding material developments;

establishing procedures for the receipt, retention and treatment of complaints received by us regarding financial controls, accounting or auditing matters and other matters;

preparing the report that the SEC requires in our annual proxy statement;

reviewing and providing oversight of any related-person transactions in accordance with our related person transaction policy;

reviewing and monitoring compliance with legal and regulatory responsibilities, including any material reports or inquiries from regulatory or governmental agencies and our code of business conduct and ethics (“Ethics Code”);

reviewing our major risk exposures, including our major financial risk exposures, and reviewing the implementation of guidelines and policies to identify, monitor and control exposures to strategic, financial, operational, regulatory, cyber security and other risks inherent in our business;

reviewing on a periodic basis our investment policy;

reviewing and providing oversight of our ESG program; and

reviewing and evaluating on an annual basis the performance of the Audit Committee and the Audit Committee Charter.

Our board of directors has determined, based upon the recommendation of the Nominating and Corporate Governance Committee, that Mr. Cole qualifies as an audit“audit committee financial expertexpert” within the meaning of SEC regulationsItem 407(d)(5) of Regulation S-K and meets the financial sophistication requirements of Nasdaq Listing Rule 5605(c)(2) of the Nasdaq listing rules.(A). In making this determination, our board of directors has considered prior experience, business acumen and independence. Both our independent registered public accounting firm and management periodically meet privately with our Audit Committee.


Report of the Audit Committee of the Board of Directors*

The Audit Committee has reviewed and discussed the audited financial statements for the fiscal year ended December 31, 2021,2022, with management of the Company. The Audit Committee has discussed with the independent registered public accounting firm the matters required to be discussed by Auditing Standard No. 1301, Communications with Audit Committees, as adopted bythe applicable requirements of the Public Company Accounting Oversight Board (the “PCAOB”). The Audit Committee has also received the written disclosures and the letter from the independent registered public accounting firm required by applicable requirements of the PCAOB regarding the independent accountants’ communications with the Audit Committee concerning independence, and has discussed with the independent registered public accounting firm the accounting firm’s independence. Based on the foregoing, the Audit Committee has recommended to the board of directors that the audited financial statements be included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2021.2022.

G. Bradley Cole (Chairperson)(Chair)
Mara G. Aspinall
Kimberlee S. Caple
Tiffany P. Olson

* The material in this report is not “soliciting material,” is not deemed “filed” with the SEC and is not to be incorporated by reference in any filing of the Company under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended, whether made before or after the date hereof and irrespective of any general incorporation language in any such filing.

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2023 Proxy Statement

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Information Regarding the Board of Directors and Corporate Governance

Compensation Committee

Our Compensation Committee consists of Miles D. Harrison, G. Bradley Cole, Ellen Goldberg and Tiffany P. Olson. Mr. Harrison serves as the chairpersonChair of our Compensation Committee. Our board of directors has determined that each of the members of our

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Compensation Committee is a non-employee director, as defined in Rule 16b-3 promulgated under the Exchange Act, and satisfies the applicable Nasdaq independence requirements. All members of the Company’s Compensation Committee are independent (as independence is currently defined in Rule 5605(d)(2) of the Nasdaq listing rules). The Compensation Committee met eightsix times during the last fiscal year. The board of directors has adopted a written Compensation Committee Charter that is available to stockholders on the Company’s website at www.CastleBiosciences.com on the “Investors” page under “Corporate Governance.”The functions of this committee include, among other things:
reviewing, modifying and approving (or if it deems appropriate, making recommendations to the full board of directors regarding) our overall compensation strategy and policies;
reviewing and approving or, in the case of our chief executive officer's compensation, making recommendations to the full board of directors regarding the compensation and other terms of employment of our executive officers;
reviewing and approving (or if it deems it appropriate, making recommendations to the full board of directors regarding) performance goals and objectives relevant to the compensation of our executive officers and assessing their performance against these goals and objectives;
reviewing and approving (or if it deems it appropriate, making recommendations to the full board of directors regarding) the equity incentive plans, compensation plans and similar programs advisable for us, as well as modifying, amending or terminating existing plans and programs;
evaluating risks associated with our compensation policies and practices and assessing whether risks arising from our compensation policies and practices for our employees are reasonably likely to have a material adverse effect on us;
reviewing and making recommendations to the full board of directors regarding the type and amount of compensation to be paid or awarded to our non-employee board members;
establishing policies with respect to votes by our stockholders to approve executive compensation as required by Section 14A of the Exchange Act and determining our recommendations regarding the frequency of advisory votes on executive compensation, to the extent required by law;
reviewing and assessing the independence of compensation consultants, legal counsel and other advisors as required by Section 10C of the Exchange Act;
administering our equity incentive plans;
establishing policies with respect to equity compensation arrangements;
reviewing the competitiveness of our executive compensation programs and evaluating the effectiveness of our compensation policy and strategy in achieving expected benefits to us;
reviewing and making recommendations to the full board of directors regarding the terms of any employment agreements, severance arrangements, change in control protections and any other compensatory arrangements for our executive officers;
reviewing with management and approving our disclosures under the caption “Compensation Discussion and Analysis” in our periodic reports or proxy statements to be filed with the SEC, to the extent such caption is required to be included in any such report or proxy statement;
preparing the report that the SEC requires in our annual proxy statement; and
reviewing and assessing on an annual basis the performance of the Compensation Committee and the Compensation Committee Charter.

reviewing, modifying and approving (or if it deems appropriate, making recommendations to the full board of directors regarding) our overall compensation strategy and policies;

reviewing and approving or, in the case of our CEO’s compensation, making recommendations to the full board of directors regarding the compensation and other terms of employment of our executive officers;

reviewing and approving (or if it deems it appropriate, making recommendations to the full board of directors regarding) performance goals and objectives relevant to the compensation of our executive officers and assessing their performance against these goals and objectives;

reviewing and approving (or if it deems it appropriate, making recommendations to the full board of directors regarding) the equity incentive plans, compensation plans and similar programs advisable for us, as well as modifying, amending or terminating existing plans and programs;

evaluating risks associated with our compensation policies and practices and assessing whether risks arising from our compensation policies and practices for our employees are reasonably likely to have a material adverse effect on us;

reviewing and making recommendations to the full board of directors regarding the type and amount of compensation to be paid or awarded to our non-employee board members;

establishing policies with respect to votes by our stockholders to approve executive compensation as required by Section 14A of the Exchange Act and determining our recommendations regarding the frequency of advisory votes on executive compensation, to the extent required by law;

reviewing and assessing the independence of compensation consultants, legal counsel and other advisors as required by Section 10C of the Exchange Act;

administering our equity incentive plans;

establishing policies with respect to equity compensation arrangements;

reviewing the competitiveness of our executive compensation programs and evaluating the effectiveness of our compensation policy and strategy in achieving expected benefits to us;

reviewing and making recommendations to the full board of directors regarding the terms of any employment agreements, severance arrangements, change in control protections and any other compensatory arrangements for our executive officers;

reviewing with management and approving our disclosures under the caption “Compensation Discussion and Analysis” in our periodic reports or proxy statements to be filed with the SEC, to the extent such caption is required to be included in any such report or proxy statement;

preparing the report that the SEC requires in our annual proxy statement; and

reviewing and assessing on an annual basis the performance of the Compensation Committee and the Compensation Committee Charter.

Compensation Committee Processes and Procedures

Typically,

Per our Charter, the Compensation Committee meets quarterly and with greater frequency, if necessary. The agenda for each meeting is usually developed by the chairpersonchair of the Compensation Committee, in consultation with management. The Compensation Committee meets regularly in executive session. However, from time to time, various members of management and other employees as well as outside advisors or consultants may be invited by the Compensation Committee to make presentations, to provide financial or other background information or advice or to otherwise participate in Compensation Committee meetings. The Chief Executive OfficerCEO does not participate in, and is not present during, any deliberations or determinations of the Compensation Committee regarding his compensation or individual performance objectives. The charter of the Compensation Committee grants the Compensation Committee full access to all books, records, facilities and personnel of the Company. In addition, under its charter, the Compensation Committee has the authority to obtain, at the expense of the Company, advice and assistance from internal and external

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legal or accounting or other advisersadvisors and other external resources that the Compensation Committee considers

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Information Regarding the Board of Directors and Corporate Governance

necessary or appropriate in the performance of its duties. The Compensation Committee has direct responsibility for the oversight of the work of any advisers engaged for the purpose of advising the compensation committee.Compensation Committee. In particular, the Compensation Committee has the sole authority to retain compensation consultants to assist in its evaluation of executive and director compensation, including the authority to approve the consultant’s reasonable fees and other retention terms. Under its charter, to the extent required by SEC and Nasdaq rules, the Compensation Committee may select, or receive advice from, a compensation consultant, legal counsel or other adviser to the Compensation Committee, other than in-house legal counsel and certain other types of advisers, only after taking into consideration six factors, prescribed by the SEC and Nasdaq Listing Rule 5605(d)(3)(D) of the Nasdaq listing rules,, that bear upon the adviser’s independence; however, there is no requirement that any adviser be independent.

During the fiscal year ended December 31, 2021,2022, after taking into account the considerations prescribed by the SEC and Nasdaq described above, the Company engaged Radford, anAon’s Human Capital Solutions Practice, a division of Aon Hewitt Company,plc (“Aon”), as its compensation consultant. RadfordAon was retained to provide an assessment of the Company’s executive compensation programs in comparison to executive compensation programs at selected publicly traded peer companies. As part of its engagement, RadfordAon was requested by the Compensation Committee to develop the peer group of comparative companies and to perform analyses of compensation levels for that group. RadfordAon developed peer group and related recommendations that were presented to the Compensation Committee for its consideration.

Under its charter, the Compensation Committee may form, and delegate authority to, subcommittees as appropriate. The Compensation Committee has delegated authority to the Chief Executive OfficerCEO and Chief Financial Officer, acting jointly (together, the “Authorized Officers”), to grant, without any further action required by the Compensation Committee, equity awards to employees who are below the level of vice president of the Company, within specifiedspecific approved ranges, which vary by position classification, as set forth by the Compensation Committee. The purpose of this delegation of authority is to enhance the flexibility of equity award administration within the Company and to facilitate the timely grant of equity awards to non-executive employees particularly new employees,and consultants under the 2019 Equity Incentive Plan (the “2019 Plan”) within specified limits approved by the Compensation Committee. Typically, as part of its oversight function, the Compensation Committee will review the list of grants made by the Authorized Officers at each regularly scheduled in-person meeting.

The Compensation Committee holds one or more meetings at the end of the year and/or during the first quarter of the year to discuss and make recommendations to the board of directors for annual compensation adjustments, annual bonuses, annual equity awards, and new corporate performance objectives. For executives other than the Chief Executive Officer,CEO, the Compensation Committee solicits and considers evaluations and recommendations submitted to the Compensation Committee by the Chief Executive Officer.CEO. In the case of the Chief Executive Officer,CEO, the evaluation of his performance is conducted by the Compensation Committee.

Nominating and Corporate Governance Committee

Our Nominating and Corporate Governance Committee consists of Mara G. Aspinall, Kimberlee S. Caple, Ellen Goldberg and Miles D. Harrison. All members of the Nominating and Corporate Governance Committee are independent (as independence is currently defined in Nasdaq Listing Rule 5605(a)(2) of the Nasdaq listing rules)). Ms. Aspinall serves as the chairpersonChair of our Nominating and Corporate Governance Committee. The Nominating and Corporate Governance Committee met four times during the last fiscal year. The board of directors has adopted a written Nominating and Corporate Governance Committee Charter that is available on the Company’s website at www.CastleBiosciences.com on the “Investors” page under “Corporate Governance.” The functions of this committee include, among other things:


identifying, reviewing and evaluating candidates to serve on our board of directors consistent with criteria approved by our board of directors;
determining the minimum qualifications for service on our board of directors;
evaluating director performance on the board and applicable committees of the board and determining whether continued service on our board is appropriate;
evaluating, nominating and recommending individuals for membership on our board of directors;
evaluating nominations by stockholders of candidates for election to our board of directors;
considering and assessing the independence of members of our board of directors;
reviewing succession planning for our management team;
developing a set of corporate governance policies and principles, including a code of business conduct and ethics, periodically reviewing and assessing these policies and principles and their application and recommending to our board of directors any changes to such policies and principles;
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considering questions of possible conflicts of interest of directors as such questions arise; and

identifying, reviewing and evaluating candidates to serve on our board of directors consistent with criteria approved by our board of directors;

determining the minimum qualifications for service on our board of directors;

evaluating director performance on the board and applicable committees of the board and determining whether continued service on our board is appropriate;

evaluating, nominating and recommending individuals for membership on our board of directors;

evaluating nominations by stockholders of candidates for election to our board of directors;

considering and assessing the independence of members of our board of directors;

reviewing succession planning for our management team;

developing a set of corporate governance policies and principles, including our Ethics Code, periodically reviewing and assessing these policies and principles and their application and recommending to our board of directors any changes to such policies and principles;

considering questions of possible conflicts of interest of directors as such questions arise; and

reviewing and assessing on an annual basis the performance of the Nominating and Corporate Governance Committee and the Nominating and Corporate Governance Committee Charter.

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2023 Proxy Statement

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Information Regarding the Board of Directors and Corporate Governance Committee and the Nominating and Corporate Governance Committee Charter.

Candidates for director nominees are reviewed in the context of the current composition of the board of directors, the operating requirements of the Company and the long-term interests of stockholders. In conducting this assessment, the Nominating and Corporate Governance Committee typically considers diversity, age, skills and such other factors as it deems appropriate, given the current needs of the board of directors and the Company, to maintain a balance of knowledge, experience and capability.

In the case of incumbent directors whose terms of office are set to expire, the Nominating and Corporate Governance Committee reviews these directors’ overall service to the Company during their terms, including the number of meetings attended, level of participation, quality of performance and any other relationships and transactions that might impair the directors’ independence. In the case of new director candidates, the Nominating and Corporate Governance Committee also determines whether the nominee is independent for Nasdaq purposes, which determination is based upon applicable Nasdaq listing rules, applicable SEC rules and regulations and the advice of counsel, if necessary. The Nominating and Corporate Governance Committee conducts any appropriate and necessary inquiries into the backgrounds and qualifications of possible candidates after considering the function and needs of the board of directors. The Nominating and Corporate Governance Committee meets to discuss and consider the candidates’ qualifications and then selects a nominee for recommendation to the board of directors by majority vote.

The Nominating and Corporate Governance Committee will consider director candidates recommended by stockholders. The Nominating and Corporate Governance Committee does not alter the manner in which it evaluates candidates, including the minimum criteria set forth above, based on whether or not the candidate was recommended by a stockholder. Stockholders who wish to recommend individuals for consideration by the Nominating and Corporate Governance Committee to become nominees for election to the board of directors may do so by delivering a written recommendation to the Nominating and Corporate Governance Committee at Castle Biosciences, Inc., 505 S. Friendswood Drive, Suite 401, Friendswood, Texas 77546, Attn: Corporate Secretary, no later than the close of business on the 90th day nor earlier than the close of business on the 120th day prior to the first anniversary of the preceding year’s annual meeting. Submissions must include the full name and address of the stockholder on whose behalf the submission is made, the number of shares owned beneficially by such stockholder as of the date of the submission, the full name of the proposed nominee, a description of the proposed nominee’s business experience for at least the previous five years, complete biographical information, a description of the proposed nominee’s qualifications as a director and any additional information required by our amended and restated bylaws. Our Nominating and Corporate Governance Committee has discretion to decide which individuals to recommend for nomination as directors. Any such submission must be accompanied by the written consent of the proposed nominee to be named as a nominee and to serve as a director if elected.

DIRECTOR COMPENSATION

The following table sets forth in summary form information concerning the compensation that was earned by each of our non-employee directors during the fiscal year ended December 31, 2022:

Name

  Fees Earned
or Paid in
Cash ($)
  

Stock
Awards

($)(1)

  

Option
Awards

($)(1)(2)

  

Total

($)

Mara G. Aspinall

   $61,500   $79,445   $100,110   $241,055  

Daniel M. Bradbury

   $83,000   $79,445   $100,110   $262,555  

Kimberlee S. Caple

   $56,500   $79,445   $100,110   $236,055  

G. Bradley Cole

   $69,000   $79,445   $100,110   $248,555  

Ellen Goldberg

   $54,000   $79,445   $100,110   $233,555  

Miles D. Harrison

   $61,500   $79,445   $100,110   $241,055  

Tiffany P. Olson

   $59,000   $79,445   $100,110   $238,555  

(1)

In accordance with SEC rules, this column reflects the aggregate grant date fair value of the stock option and RSU awards granted in 2022 computed in accordance with Financial Accounting Standards Board (“FASB”) Accounting Standards Codification Topic (“ASC 718”). Accordingly, these amounts will vary from the stated value of the awards in the Non-Employee Director Compensation Policy described below. Assumptions used in the calculation of these amounts are described in Note 14 to our consolidated financial statements appearing in our Annual Report on Form 10-K for the fiscal year ended December 31, 2022. The amounts reported in this column reflect the accounting value of these awards and do not correspond to the actual economic value that ultimately may be realized by our non-employee directors.

(2)

As of December 31, 2022, the aggregate number of shares outstanding under all options to purchase our common stock held by our non-employee directors were: Ms. Aspinall, 51,039, Mr. Bradbury, 49,921, Ms. Caple, 13,012, Mr. Cole, 74,669, Ms. Goldberg, 13,012, Mr. Harrison, 35,026, and Ms. Olson, 13,583.

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Stockholder Communications with

Information Regarding the Board of Directors and Corporate Governance

Mr. Maetzold, our President and CEO, is also a member of our board of directors but did not receive any additional compensation for his service as a director. See the section titled “Compensation Discussion and Analysis—Elements of Our Executive Compensation Program” below for more information regarding the compensation earned by Mr. Maetzold.

We have reimbursed and will continue to reimburse all of our non-employee directors for their travel, lodging and other reasonable expenses incurred in attending meetings of our board of directors and committees of our board of directors.

Non-Employee Director Compensation Policy

Our board of directors has adopted a non-employee director compensation policy that is applicable to each member of our board of directors who is not also serving as an employee or consultant. Our Compensation Committee reviews non-employee director compensation levels annually and submits recommendations with respect to any changes in non-employee director compensation levels to our Board. In 2022, our Compensation Committee’s independent compensation consultant reviewed the market competitiveness of our non-employee director compensation policy relative to our compensation peer group and recommended certain changes based on governance best practices and market trends to ensure we can attract and retain a highly qualified board of directors.

Upon recommendation of the Compensation Committee, our Board approved an amendment to our non-employee director compensation policy in January 2023 that provided for the following compensation for service on our board of directors:

Cash Compensation

an annual cash retainer to $45,000 (an increase from $42,000 previously);

an annual cash retainer of $45,000 for service as chair of the board of directors (an increase from $42,000 previously);

an additional annual cash retainer of $10,000, $7,500 and $5,000 for service as a member of the Audit Committee, Compensation Committee and the Nominating and Corporate Governance Committee, respectively (committee chairs will not receive this retainer in addition to the committee chair service retainer) (no increase from previous levels); and

an additional annual cash retainer of $20,000, $20,000 and $10,000 for service as chair of the Audit Committee, Compensation Committee and the Nominating and Corporate Governance Committee, respectively (an increase from $15,000 for the Chair of the Compensation Committee, no increase from previous levels for others).

Equity Compensation

New Directors: Upon joining the Board, directors receive an initial equity grant valued at $350,000, consisting of a restricted stock unit (“RSU”) award covering a number of shares of common stock calculated by dividing $350,000 by the average of the closing prices of our common stock for each trading day within the 30 calendar days prior to the grant date rounded down to the nearest whole share. The shares subject to the initial equity grant will vest in a series of three successive equal annual installments over the three-year period measured from the date of grant.

Prior to the January 2023 amendment, the initial grant was calculated as the number of stock option equivalent shares equal to the aggregate value of the initial grants, based on a Black-Scholes valuation methodology using an assumed stock price equal to the average of the closing prices of our common stock for each trading day within the 30 calendar days prior to the grant date. The total number of total stock option equivalent shares was then allocated as follows: (i) 67% to the grant of stock options and (ii) 33%, divided by two, to the grant of RSUs, in each case subject to certain rounding conventions.

Current Directors: Annually, our directors receive an equity grant valued at $200,000, consisting of an RSU award covering a number of shares of common stock calculated by dividing $200,000 by the average of the closing prices of our common stock for each trading day within the 30 calendar days prior to the grant date rounded down to the nearest whole share. The shares subject to the annual equity grant vested in full on the one-year anniversary of the date of grant.

Prior to the amendment, the total number of shares subject to the annual equity grants was calculated as the number of stock option equivalent shares equal to the aggregate value of the annual grants, based on a Black-Scholes valuation methodology and assumed stock price equal to the average of the closing prices of our common stock for each trading day within the 30 calendar days prior to the grant date. The total number of stock option equivalent shares was then allocated as follows: (i) 50% to the grant of stock options and (ii) 50%, divided by two, to the annual grant of RSUs, in each subject to certain rounding conventions. The shares subject to the annual grant through both stock options and RSUs will vest in full on the one-year anniversary of the date of grant.

In making the decision to allocate grants between stock option and RSUs, the Compensation Committee has continued to monitor the market trends and the investor preference for the Board to be aligned long-term with stockholder value creation. The Board believes that options provide a long-term time horizon reflective of development cycles for our business, while the RSUs provide compensation for current service and reinforce the ownership culture that we have built.

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Information Regarding the Board of Directors and Corporate Governance

Each of the option or RSU grants described above were, or will be, granted under the 2019 Plan. Each such option or RSU grant will vest subject to the director’s continuous service to us, provided that each option or RSU will vest in full upon a change in control (as defined in the 2019 Plan). The term of each option is 10 years, subject to earlier termination as provided in the 2019 Plan, provided that upon a termination of service other than for death, disability or cause, the post-termination exercise period will be three months from the date of termination. An eligible director may decline all or any portion of his or her compensation by giving notice to us prior to the date cash may be paid or equity awards are to be granted, as the case may be.

STOCK OWNERSHIP GUIDELINES

The board of directors has adopted Stock Ownership Guidelines that apply to our CEO and our Section 16 officers and our non-employee directors. See the“—Stock Ownership Guidelines” section in the “Compensation Discussion and Analysis” section of this Proxy Statement for more information.

ENVIRONMENTAL, SOCIAL AND GOVERNANCE PROGRAM

We believe that building a strong ESG program that is relevant to our core business and our stakeholders is essential for success and were pleased to release our inaugural ESG report in November 2021. The release of this report marked an important milestone in our journey as a company and reinforced our commitment to serving our stakeholders in an ethical and responsible manner and to our vision of transforming disease management by keeping people first: patients, clinicians, employees and stockholders.

ESG Board Oversight

In April 2021, our Board amended our Audit Committee Charter to delegate the review and oversight of our ESG program to the Audit Committee, which was driven by our desire to integrate ESG principles into our business strategy in ways that optimize opportunities to make positive impacts while advancing long-term goals. We are committed to advancing our ESG strategy, improving our capabilities and measuring our progress based on key performance indicators.

In addition, we established an internal management committee, which is responsible for leading our ESG strategy and monitoring our initiatives. This internal ESG working group is led by a cross-functional team of leaders, including leaders from marketing, finance, human resources and operations.

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Information Regarding the Board of Directors and Corporate Governance

2022 Highlights

As part of our 2022 ESG efforts, we prioritized assessing our Scope 1 and 2 GHG emissions; established a diversity, equity and inclusion statement; and developed a code of conduct for our vendors. Our senior leadership team is tasked with driving results in these areas, given the strategic importance of ESG. Against this backdrop, we have engaged with our internal and external stakeholders on various ESG topics to help further inform our future direction and priorities. Our 2022 areas of focus for various ESG initiatives included: (1) Culture of Inclusion, (2) Environmental Impact, and (3) Strong Governance.

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Culture of Inclusion

We thrive on the contributions each person brings to Castle by valuing diversity, developing talent, fostering teamwork and rewarding success. We understand the importance of maintaining a strong corporate culture with our employees at the center, based on the cornerstones we laid in 2008 at our inception: trust, excellence, collaboration, integrity, innovation and excitement. To foster these values and to attract and retain quality employees, we strive to hire, develop and promote a workforce that shares our mission and cultivates a culture of inclusion.

Diversity, Equity and Inclusion

Castle’s DEI strategy is focused on creating a culture of belonging, where employees can be their authentic selves. Our commitment to DEI starts with our goal of developing a workforce that is diverse in background, knowledge, skill and experience.

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Information Regarding the Board of Directors and Corporate Governance

As of December 31, 2022, our overall workforce was 66% female and 26% ethnically or racially diverse (as self-reported by the employee or, in cases where the employee did not provide this information, as determined by us). Additionally, half of our board of directors is female, which we believe exemplifies our commitment to diversity of opinion and perspectives, starting at the board level. In 2022, we developed our DEI Statement. We have implemented policies and training focused on non-discrimination and harassment prevention. Other notable highlights include:

Engaged with minority colleges to recruit diverse talent and began tracking diverse hiring.

Conducted training with Castle hiring managers on diverse hiring practices in alignment with our affirmative action plan.

Identified three core areas that will guide our DEI strategy and programs going forward. These pillars are: recruiting a diverse workforce, building a culture of inclusion and promoting transparency.

We recognize that Castle plays an important part in the lives of our employees and strive to create a transparent workplace where employees feel heard, valued and appreciated for who they are. We encourage every one of our team members to form deeper relationships with those around them. In 2022, we conducted employee surveys and 81% of our employees indicated that they are “engaged” or “enthusiastically engaged” in the culture at Castle compared to the healthcare benchmark of 53% for this survey (the healthcare benchmark average of 53% is for other healthcare companies who conducted the same employee engagement survey in 2022).

Human Capital Management

As a rapidly growing company, we have begun to transform and modernize our culture and talent management by implementing Human Capital Management (“HCM”) reporting and practices to establish a foundation to enable leaders to better hire talent and manage teams. These practices include standards for setting goals, performance evaluations, succession planning, and learning and development.

The health and safety of our employees is paramount, and our success is fundamentally connected with the well-being of our people. Thus, the health and well-being of our employees is our top priority and in recognition of this, we aim to provide a robust health and wellness package, including:

competitive salary;

annual bonus opportunity;

equity compensation, including stock options and/or RSUs and participation in our employee stock purchase plan;

defined contribution 401(k) plan with employer matching contributions;

medical, dental and vision plans with generous Company support;

paid maternity, paternity and adoption leave policies;

paid holidays and paid time off;

an employee assistance program; and

wellness initiatives and incentives

Social Responsibility

We are committed to improving health through innovative tests that help guide patient care, which includes our efforts to make our tests more accessible and more affordable, and we engage with organizations who share these goals.

We believe that quality care should not be dependent on a patient’s financial situation. We work with a variety of insurance providers to obtain payment for our tests, including Medicare, Medicaid, commercial insurers and the United States Department of Veterans Affairs. We also offer financial support through our Patient Assistance Program.

We also believe that investing in local communities to create social outcomes is at the heart of generating our culture of inclusion, and we believe in giving back to the communities in which we live and work. Patient advocacy is at the center of our community engagement strategy. We are proud to work alongside some of the leading skin cancer, esophageal cancer, mental health and ocular cancer organizations through fundraising efforts, educational sponsorship, community development efforts, charity drives, and partnerships targeted at patient groups who may benefit from our tests.

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Information Regarding the Board of Directors and Corporate Governance

Environmental Impact

We are committed to responsible environmental practices that include conservation of natural resources, pollution prevention, and reduction of waste. We embed the principles of advancing a circular economy into our practices. We are devoted to operating our business in a sustainable manner and have undertaken several initiatives designed to reduce our impact on the environment and to promote environmentally friendly projects and practices. In 2022, we:

Published an Environmental Policy Statement that outlines our commitment to conducting our business responsibly by focusing on our operations, sourcing, waste management, environmental performance monitoring and employee engagement.

Engaged an external consultant to complete a GHG emission assessment for the first time. Scope 1 and 2 GHG emissions were measured at Castle offices and data centers. The assessment was completed in alignment with the GHG Protocol to baseline our 2021 (calendar year) emissions. Castle’s market-based Scope 1 and 2 GHG emissions for 2021 equated to 755.08 MtCO2e.

Encouraged environmentally friendly work practices by supporting recycling and reuse and by continuing to install energy efficient equipment and systems throughout our sites.

Increased the use of digital solutions and migrate technology infrastructure to a cloud environment, reducing energy usage, and accordingly, our carbon footprint.

We continue to evaluate green equipment for office use such as Energy-Star® appliances, motion detector lighting, as well as high-efficiency HVAC units. Most of Castle’s total office space utilizes LED lighting. We believe that our focus on environmental sustainability, with the objective of reducing costs and improving sustainability of our operations will provide a strategic benefit for Castle.

Code of Business Conduct and Ethics

We have a written Ethics Code that applies to all officers, directors and employees, including our principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions. The Ethics Code is available on our website at www.CastleBiosciences.com. If we ever were to amend or waive any provision that applies to our principal executive officer, principal financial officer, principal accounting officer or any person performing similar functions, we intend to satisfy our disclosure obligations, if any, with respect to any such waiver or amendment by posting such information on our website, rather than by filing a Current Report on Form 8-K.

Strong Governance

Our board of directors and senior leadership actively support and promote strong governance and risk management across Castle. This culture of transparency and accountability affirms our unwavering commitment to our values. Our board members set the tone for Castle and, along with all employees, are required to comply with the standards in our Ethics Code, which we believe is based on best practices that meet or exceed current rules and regulations of the SEC and Nasdaq listing standards.

We are committed to conducting our business in a manner that is fair, ethical and responsible to earn and maintain the trust of our stakeholders. Castle is committed to working with vendors willing to support our sustainability initiatives. Recently, we published a Vendor Code of Conduct that addresses our expectations of all Castle vendors regarding responsible and ethical conduct. This includes compliance with anti-bribery and anti-corruption laws; prohibition of discrimination and harassment; and upholding product quality, fair labor practices, health and safety, and environmental laws.

Our Board, including through its Audit Committee, is responsible for overseeing our risk management processes and regularly discusses with management our risks and subsequent strategies. As a result, we have implemented risk management programs to foster compliance with applicable laws and regulations governing ethical business practices. Our employees are responsible for complying with our data security standards and complete mandatory annual training to understand the behaviors and technical requirements necessary to keep patient personally identifiable information secure. In 2022, 100% of Castle employees completed training on compliance, fraud, waste and abuse.

Our IT team works 24/7 and uses a combination of advanced tools and innovative technologies to help protect our stakeholders’ data. We also employ ongoing education for team members to recognize and report suspicious activity. We leverage the latest encryption configurations and cybertechnologies on our systems, devices, and third-party connections and further review vendor encryption to ensure proper information security safeguards are maintained.

We routinely engage with our stakeholders to better understand their views on ESG matters, carefully considering the feedback we receive and acting when appropriate.

Information about our ESG efforts can be found on our website at https://castlebiosciences.com/environmental-social-and-governance.

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Information Regarding the Board of Directors and Corporate Governance

STOCKHOLDER COMMUNICATIONS WITH THE BOARD OF DIRECTORS

The board of directors has adopted a formal communication process by which stockholders may communicate with the board of directors or any individual director. Stockholders who wish to communicate with our board of directors or with an individual director may do so by mail to our board of directors or the individual director, in care of the Company at Castle Biosciences, Inc., 505 S. Friendswood Drive, Suite 401, Friendswood, Texas 77546, Attn: Corporate Secretary. Each communication must set forth (i) the name and address of the stockholder on whose behalf the communication is sent and (ii) the number of Company shares that are owned beneficially by such stockholder as of the date of the communication. Each communication will be reviewed by the Company’s Corporate Secretary to determine whether it is appropriate for presentation to the board of directors or such director. Examples of inappropriate communications include advertisements, solicitations or hostile communications. Communications determined by the Company’s Corporate Secretary to be appropriate for presentation to the board of directors or such director will be submitted to the board of directors or such director on a periodic basis.

CASTLE BIOSCIENCES | 2023 Proxy Statement

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Environmental, Social and Governance Program (“ESG”)
We believe that building a strong ESG program that is relevant to our core business and our stakeholders is essential for success and were pleased to release our inaugural ESG report in November 2021. The release

Proposal 2

Ratification of this report marked an important milestone in our journey as a company and reinforced our commitment to serving our stakeholders in an ethical and responsible manner and importantly, to our visionSelection of transforming disease management by keeping people first: patients, clinicians, employees and investors. Our ESG report details our related policies and metrics, aligned with the SustainabilityIndependent Registered Public Accounting Standards Board index, with key highlights as follows:

Governance
In April 2021, our board of directors amended our Audit Committee Charter to add review and oversight of our ESG program to its responsibilities. The Audit Committee will periodically provide reports to the board of directors on ESG matters. Additionally, we established an internal management committee comprised of a cross-functional set of representatives, including leaders from
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marketing, finance, human resources and operations, to develop strategy and execute on these matters. On a periodic basis, this management committee will report to the Audit Committee.
Code of Business Conduct and Ethics
Our Code of Business Conduct and Ethics (our “Ethics Code”) outlines our commitment to maintaining the highest standards of ethics and responsible business practices and applies to all officers, directors and employees, including our principal executive officer, principal financial officer, principal accounting officer or controller, or person performing similar functions. The Ethics Code is available on the Company’s website at www.CastleBiosciences.com on the “Investors” page under “Corporate Governance.” If we make any substantive amendments to the Ethics Code or grant any waiver from a provision of the Ethics Code to any executive officer or director, we will promptly disclose the nature of the amendment or waiver on our website or in a Form 8-K filed with the SEC.
Human Capital
Our vision is to transform disease management by keeping people first: patients, clinicians, employees and investors. We understand the importance of maintaining a strong corporate culture with our employees at the center, based on the cornerstones we laid in 2008 at our inception: trust, excellence, collaboration, integrity, innovation and excitement. We strive to find members of our team who embody the values of our company.
We believe that we provide competitive benefits and compensation packages and offer the following, among others, to our full-time employees: a defined contribution 401(k) plan with employer-matching contributions and no vesting requirement; an annual and/or quarterly bonus opportunity; an equity incentive plan and an employee stock purchase plan; and medical, dental and vision plans.
We were named as a 2021 Houston Chronicle Top Workplace and as a 2022 Top Workplace in the USA by Energage.
Diversity, Equity and Inclusion (“DEI”)
We recognize the importance of DEI in recruiting, developing and retaining the best available talent and are committed to further understanding and building upon our existing DEI strengths. As of December 31, 2021, our overall workforce was 64.6% female and 35.4% male, with women holding 35.7% of our leadership positions. Additionally, half of our board of directors is female, which reinforces our commitment to diversity of opinion and perspectives at the board level.
Social Responsibility
We are committed to improving health through innovative tests that help guide patient care, which includes our efforts to make our tests more accessible and more affordable and engage with organizations who share our goals.
We believe that quality care should not be dependent on a patient’s financial situation. We work with a variety of insurance providers to obtain payment for our tests, including Medicare, Medicaid, commercial insurers and the United States Department of Veterans Affairs. We also offer financial support through our Patient Assistance Program.
Patient advocacy is at the center of our community engagement strategy, and we are proud to work alongside some of the leading skin and ocular cancer organizations to sponsor events, key fundraisers and prevention and educational programs targeted at the patient groups who may benefit from our tests. These organizations include, but are not limited to, the Melanoma Research Foundation, Colorado Melanoma Foundation, AIM at Melanoma, IMPACT Melanoma, American Academy of Dermatology (“AAD”), A Cure In Sight and Outrun the Sun. We are also a proud member of the AAD Corporate Partner Circle, which is the AAD’s highest level of corporate recognition.
More information about our ESG efforts can be found on our website at https://castlebiosciences.com/environmental-social-and-governance. Our website and the information contained in these reports are not incorporated by reference into this Proxy Statement or any of our other filings with the SEC.
Prohibited Transactions
Pursuant to our Insider Trading Policy, our employees, officers and directors are prohibited from engaging in inherently speculative transactions with respect to our securities, including (i) short sales, transactions in put options, call options or other derivative securities on an exchange or in any other organized market, or in any other inherently speculative transactions, (ii) hedging or monetization transactions, including through the use of variable forwards, equity swaps, collars and exchange funds, and (iii) holding our securities in a margin account or otherwise pledging our securities as collateral for a loan.
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PROPOSAL 2
RATIFICATION OF SELECTION OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
Firm

The Audit Committee has selected KPMG LLP (“KPMG”) as the Company’s independent registered public accounting firm for the fiscal year ending December 31, 2022,2023, and has further directed that management submit the selection of its independent registered public accounting firm for ratification by the stockholders at the Annual Meeting. KPMG has audited the Company’s financial statements since 2018. A representative of KPMG is expected to be present at the Annual Meeting. Such representative will be provided an opportunity to make a statement if he or she so desires and will be available to respond to appropriate questions presented at the meeting.

Neither the Company’s amended and restated bylaws nor other governing documents or law require stockholder ratification of the selection of KPMG as the Company’s independent registered public accounting firm. However, the Audit Committee is submitting the selection of KPMG to stockholders for ratification as a matter of good corporate practice. If the stockholders fail to ratify the selection, the Audit Committee will reconsider whether or not to retain the firm. Even if the selection is ratified, the Audit Committee in its direction may direct the appointment of a different independent registered public accounting firm at any time during the year if it determines that such a change would be in the best interests of the Company and its stockholders.

The affirmative vote of the holders of a majority of the shares present in person or represented by proxy and entitled to vote on the matter at the Annual Meeting will be required to ratify the selection of KPMG.

Principal Accountant Fees and Services

The following table represents aggregate fees billed to the Company by KPMG for the fiscal years ended December 31, 2021,2022, and 2020:

Years Ended December 31,
20212020
Audit Fees(1)
$1,887,660 $1,285,000 
Audit-Related Fees— — 
Tax Fees— — 
All Other Fees(2)
1,780 1,780 
Total$1,889,440 $1,286,780 
2021:

(1)Audit Fees are for the annual audit and quarterly reviews of the Company’s financial statements, audits required by public company regulation, professional consultations with respect to accounting issues, registration statement filings and issuances of consents and similar matters. The fees for 2020 include $225,000 billed in connection with the June 2020 and December 2020 public offerings of our common stock.
(2)Consists of a subscription to an online accounting research tool.

   Years Ended December 31,
    2022  2021

Audit Fees(1)

   $2,114,500   $1,887,660  

Audit-Related Fees

        —  

Tax Fees

        —  

All Other Fees(2)

    1,780    1,780  

Total

   $2,116,280   $1,889,440  

(1)

Audit Fees consist of fees incurred in connection with the annual audit and quarterly reviews of our financial statements, audits required by public company regulation, professional consultations with respect to accounting issues, registration statement filings and issuances of consents and similar matters.

(2)

All Other Fees consist of fees incurred in connection with a subscription to an online accounting research tool.

All fees described above were pre-approved by the Audit Committee and the Audit Committee concluded that the provision of such services by KPMG did not impact KPMG’s independence in the conduct of its auditing functions.

Under its charter, the Audit Committee has the responsibility for ensuring the rotation of audit partners as required by law as well as periodically evaluating whether to adopt a policy and to consider periodically and, if deemed appropriate, adopt a policy regarding rotation of auditing firms.

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Proposal 2 Ratification of Selection of Independent Registered Public Accounting Firm

Pre-Approval Policies and Procedures

The Audit Committee has adopted a policy and procedure for the pre-approval of audit and non-audit services rendered by the Company’s independent registered public accounting firm, KPMG. firm. Pre-approval may be given as part of the Audit Committee’s approval of the scope of the engagement of the independent registered public accounting firm or on an individual, case-by-case basis before the independent registered public accounting firm is engaged to provide each service.

LOGO

The Board of Directors Recommends

a Vote “FOR”FOR Ratification of the Selection of KPMG.

CASTLE BIOSCIENCES | 2023 Proxy Statement

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PROPOSAL

Proposal 3

ADVISORY VOTE ON NAMED EXECUTIVE OFFICER COMPENSATION

Advisory Vote on Named Executive Officer Compensation

Background

In accordance with the requirements of the Dodd-Frank Wall Street Reform and Consumer Protection Act (the “Dodd-Frank Act”) and Section 14A of the Exchange Act, our stockholders are entitled to cast a non-binding, advisory vote to approve the compensation of our named executive officers (our “Named Executive Officers” or “NEOs”) as disclosed in this Proxy Statement (commonly known as a “say-on-pay”“Say-on-Pay” proposal). This say-on-paySay-on-Pay vote is not intended to address any specific item of compensation or the compensation of any specific named executive officer,NEO, and instead provides our stockholders the opportunity to express their views on the overall compensation of our named executive officersNEOs and Castle’s philosophy, policies and practices described in this Proxy Statement. While the results of the vote are non-binding and advisory in nature, the Board intends to carefully consider the results of this vote. Please read the “Compensation Discussion and Analysis” and “Executive Compensation” sectionCompensation Tables” sections of this Proxy Statement for additional details about our executive compensation program. Accordingly, our board of directors is asking our stockholders to indicate their support for the compensation of our named executive officersNEOs as described in this Proxy Statement by casting a non-binding, advisory vote “FOR” the following resolution at the Annual Meeting:

RESOLVED, that the compensation paid to the Company’s named executive officers,NEOs, as disclosed pursuant to Item 402 of Regulation S-K, including the Compensation Discussion and Analysis, compensation tables and narrative discussion, is hereby APPROVED.APPROVED.

Advisory approval of this proposal requires “FOR” votes from the holders of a majority of shares present or represented by proxy and entitled to vote on the matter at the Annual Meeting. We currently hold our Say-on-Pay vote every year. At our 2022 annual meeting of stockholders, our stockholders indicated “1 year” as their preferred frequency of Say-on-Pay votes. In light of this result and consistent with the Board’s recommendation, the Board has determined to hold future advisory votes on executive compensation every year. Stockholders will have an opportunity to cast an advisory vote on the frequency of Say-on-Pay votes every six years. Accordingly, the next advisory vote on the frequency of the Say-on-Pay vote will occur no later than the 2028 annual meeting of stockholders.

Executive Compensation

We believe that our compensation policies and procedures are generally aligned with the long-term interests of our stockholders. Because the vote is advisory, it is not binding on us or our board of directors. Nevertheless, the views expressed by our stockholders, whether through this vote or otherwise, are important to management and our board of directors and, accordingly, our board of directors and our Compensation Committee intend to consider the results of this vote and other ongoing feedback from investors through engagement efforts in making future determinations regarding executive compensation arrangements.

LOGO

The Board of Directors Recommends

a Vote “FOR”FOR Approval of the Compensation of Our Named Executive Officers as Disclosed in This Proxy Statement.

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PROPOSAL 4
ADVISORY VOTE ON THE FREQUENCY OF SOLICITATION OF
ADVISORY STOCKHOLDER APPROVAL OF
EXECUTIVE COMPENSATION
Background
The Dodd-Frank Act and Section 14A of the Exchange Act enable our stockholders, at least once every six years, to indicate their preference regarding how frequently we should solicit a non-binding, advisory vote on the compensation of our named executive officers as disclosed in the Company’s proxy statement. Accordingly, our board of directors is asking our stockholders to cast a non-binding, advisory vote with respect to their preferred frequency of say-on-pay proposals thereafter (commonly known as a “say-on-frequency” proposal) and indicate whether they would prefer a say-on-pay vote to occur every year, every two years or every three years. Stockholders may also abstain from casting a vote.
Frequency of Say-on-Pay Proposals
Our board of directors believes that giving our stockholders the right to cast an annual non-binding, advisory vote to indicate their approval of the compensation of our named executive officers is the most appropriate frequency for us at this time because it allows our stockholders to provide us with more immediate feedback on the compensation of our named executive officers.
Stockholders are not voting to approve or disapprove the recommendation of our board of directors. Although our board of directors recommends that a say-on-pay vote be solicited every year, our stockholders will be able to specify one of four choices on this year’s say-on-frequency proposal as follows: (i) “1 YEAR,” (ii) “2 YEARS,” (iii) “3 YEARS” or (iv) “ABSTAIN.” The outcome of this say-on-frequency vote is not binding on us or our board of directors. Nevertheless, our board of directors values the opinion of Castle’s stockholders and will take into account the outcome of this non-binding, advisory vote when considering how frequently to solicit say-on-pay votes in future years.

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Security Ownership of Certain Beneficial Owners and Management

The following table sets forth certain information regarding the ownership of the Company’s common stock as of March 31, 2023 by (i) each of our directors; (ii) each of our NEOs; (iii) all of our current executive officers and directors as a group; and (iv) all those known by the Company to be beneficial owners of more than 5% of its common stock. Applicable percentages are based on 26,686,201 shares outstanding on March 31, 2023, adjusted as required by rules promulgated by the SEC. Except as otherwise noted below, the address for each person or entity listed in the table is c/o Castle Biosciences, Inc., 505 S. Friendswood Drive, Suite 401, Friendswood, Texas 77546.

We have determined beneficial ownership in accordance with the rules of the SEC. These rules generally attribute beneficial ownership of securities to persons who possess sole or shared voting power or investment power with respect to those securities. In addition, the rules include shares of common stock issuable pursuant to the exercise of stock options or warrants that are either immediately exercisable or exercisable on or before May 30, 2023, which is 60 days after March 31, 2023. These shares are deemed to be outstanding and beneficially owned by the person holding those options or warrants for the purpose of computing the percentage ownership of that person, but they are not treated as outstanding for the purpose of computing the percentage ownership of any other person. Unless otherwise indicated, the persons or entities identified in this table have sole voting and investment power with respect to all shares shown as beneficially owned by them, subject to applicable community property laws.

Beneficial Owner

  Number of
Shares
Beneficially
Owned
   Percentage of
Shares
Beneficially
Owned
 

Greater than 5% Stockholders

    

Wasatch Advisors, Inc.(1)

   3,222,562    12.1% 

BlackRock, Inc.(2)

   2,123,688    8.0% 

The Vanguard Group(3)

   1,392,724    5.2% 

Directors and NEOs

    

Mara G. Aspinall(4)

   73,139    * 

Daniel M. Bradbury(5)

   386,297    1.4% 

Kimberlee S. Caple(6)

   3,718    * 

G. Bradley Cole(7)

   65,921    * 

Ellen Goldberg(8)

   3,718    * 

Miles D. Harrison(9)

   28,209    * 

Tiffany P. Olson(10)

   7,411    * 

Derek J. Maetzold(11)

   1,034,732    3.8% 

Frank Stokes(12)

   148,045    * 

Kristen M. Oelschlager(13)

   232,007    * 

Tobin W. Juvenal(14)

   135,342    * 

All current executive officers and directors as a group (11 persons)(15)

   2,118,539    7.7% 

*

Represents beneficial ownership of less than 1%.

CASTLE BIOSCIENCES | 2023 Proxy Statement

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Security Ownership of Certain Beneficial Owners and Management

(1)

Based on information reported in a Schedule 13G as of December 31, 2022, filed with the SEC on February 9, 2023, and consists of 3,222,562 shares of common stock held by Wasatch Advisors, Inc. (“Wasatch”). Wasatch has sole voting and dispositive power over the shares of common stock. The Boardaddress of Directors Recommends

Wasatch is 505 Wakara Way, Salt Lake City, UT 84108.

(2)

Based on information reported in a Vote for “1 YEAR”Schedule 13G as of December 31, 2022, filed with the Preferred FrequencySEC on February 3, 2023, and consists of 2,123,688 shares of common stock held by BlackRock, Inc. (“BlackRock”). BlackRock has sole voting power with respect to 2,073,858 shares of common stock and sole dispositive power with respect to 2,123,688 shares of common stock. The address of BlackRock is 55 East 52nd Street, New York, NY 10055.

(3)

Based on information reported in a Schedule 13G as of December 30, 2022, filed with the SEC on February 9, 2023, and consists of 1,392,724 shares of common stock held by The Vanguard Group Inc. (“Vanguard”). Vanguard has no sole voting with respect to the shares of common stock, sole dispositive power with respect to 1,356,506 shares of common stock, shared voting power with respect to 17,483 shares of common stock and shared dispositive power with respect to 36,218 shares of common stock. The address of Vanguard is 100 Vanguard Boulevard, Malvern, PA 19355.

(4)

Consists of (i) 31,678 shares of common stock and (ii) 41,461 shares of common stock issuable upon the exercise of stock options that are exercisable or will be exercisable within 60 days of March 31, 2023.

(5)

Consists of (i) 830 shares of common stock held by Daniel M. Bradbury, (ii) 169,539 shares of common stock held by BioBrit, LLC (“BioBrit”), (iii) 87,780 shares of common stock held by Daniel Bradbury Irrevocable Descendant’s Trust, (iv) 87,805 shares of common stock held by Annette Bradbury Irrevocable Descendant’s Trust and (v) 40,343 shares of common stock issuable upon the exercise of stock options that are exercisable or will be exercisable within 60 days of March 31, 2023. Mr. Bradbury is the managing member of BioBrit and has voting and investment power of the Solicitationshares held by BioBrit. The address of Advisory Stockholder ApprovalBioBrit is 2223 Avenida de la Playa, Suite 108, La Jolla, CA 92037. Mr. Bradbury and his spouse are trustees of Executive Compensation.Daniel Bradbury Irrevocable Descendant’s Trust, and their children are beneficiaries. Mr. Bradbury and his spouse are trustees of Daniel Bradbury Irrevocable Descendant’s Trust and Annette Bradbury Irrevocable Descendant’s Trust, and their children are beneficiaries.

(6)

Consists of (i) 440 shares of common stock and (ii) 3,278 shares of common stock issuable upon the exercise of stock options that are exercisable or will be exercisable within 60 days of March 31, 2023.

(7)

Consists of (i) 830 shares of common stock and (ii) 65,091 shares of common stock issuable upon the exercise of stock options that are exercisable or will be exercisable within 60 days of March 31, 2023.

(8)

Consists of (i) 440 shares of common stock and (ii) 3,278 shares of common stock issuable upon the exercise of stock options that are exercisable or will be exercisable within 60 days of March 31, 2023.

(9)

Consists of (i) 830 shares of common stock and (ii) 27,379 shares of common stock issuable upon the exercise of stock options that are exercisable or will be exercisable within 60 days of March 31, 2023.

(10)

Consists of (i) 2,968 shares of common stock and (ii) 4,443 shares of common stock issuable upon the exercise options that are exercisable or will be exercisable within 60 days of March 31, 2023.

(11)

Consists of (i) 160,357 shares of common stock held by Derek J. Maetzold, (ii) 130,000 shares of common stock held by DJM Grantor Retained Annuity Trust No. 4, (iii) 106,637 shares of common stock held by the Derek Maetzold 2020 Irrevocable Trust, (iv) 117,742 shares of common stock held by The Maetzold Descendants 2020 Trust and (v) 22,310 shares of common stock held by The Maetzold 2018 Remainder Trust FBO Hannah Elizabeth Maetzold, (vi) 22,302 shares of common stock held by The Maetzold 2018 Remainder Trust FBO Peter Douglas Maetzold, (vii) 22,309 shares of common stock held by The Maetzold 2018 Remainder Trust FBO Emily Carol Kirk, (viii) 22,309 shares of common stock held by The Maetzold 2018 Remainder Trust FBO John Derek Maetzold and (ix) 430,766 shares of common stock issuable upon the exercise of stock options that are exercisable or will be exercisable within 60 days of March 31, 2023. Mr. Maetzold is a trustee and beneficiary of the DJM Grantor Retained Annuity Trust No. 4. Mr. Maetzold’s spouse is trustee of The Maetzold Descendants 2020 Trust and his spouse, and their children are beneficiaries. Mr. Maetzold is trustee of the Derek Maetzold 2020 Irrevocable Trust, The Maetzold 2018 Remainder Trust FBO Hannah Elizabeth Maetzold, The Maetzold 2018 Remainder Trust FBO Peter Douglas Maetzold, The Maetzold 2018 Remainder Trust FBO Emily Carol Kirk and The Maetzold 2018 Remainder Trust FBO John Derek Maetzold and his children are beneficiaries.

(12)

Consists of (i) 19,419 shares of common stock and (ii) 128,626 shares of common stock issuable upon the exercise of stock options that are exercisable or will be exercisable within 60 days of March 31, 2023.

(13)

Consists of (i) 119,673 shares of common stock and (ii) 112,334 shares of common stock issuable upon the exercise of stock options that are exercisable or will be exercisable within 60 days of March 31, 2023.

(14)

Consists of (i) 22,092 shares of common stock, (ii) 2,230 shares of common stock held by the Tobin W. and Susan M. Juvenal Family Revocable Trust and (iii) 111,020 shares of common stock issuable upon the exercise of stock options that are exercisable or will be exercisable within 60 days of March 31, 2023. Mr. Juvenal and his spouse are trustees of the Tobin W. and Susan M. Juvenal Family Revocable Trust and their children are beneficiaries.

(15)

Consists of the shares described in footnotes (4) through (14).

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EXECUTIVE OFFICERS

Executive Officers

Our executive officers hold office at the pleasure of the board of directors and until their successors have been duly elected and qualified, unless removed sooner. Any officer elected or appointed by the board of directors may be removed at any time by the board of directors. If the office of any officer becomes vacant for any reason, the vacancy may be filled by the board of directors. There are no family relationships among any of our directors or executive officers. The following table sets forth information concerning our executive officers as of April 21, 2022:

12, 2023:

Name

AgePosition(s)

Derek J. Maetzold

6061President, Chief Executive OfficerCEO and Director

Frank Stokes

5253Chief Financial Officer

Tobin W. Juvenal

6263Chief Commercial Officer

Kristen M. Oelschlager R.N.

5455Chief Operating Officer

Derek J. Maetzoldfounded Castle Biosciences in September 2007 and has served as our President and Chief Executive OfficerCEO and as a member of our board of directors since inception. Additional information regarding Mr. Maetzold’s experience and education is set forth above in the section titled “Proposal 1: Election of Directors—Class III Directors Nominees for Election for a Three-Year Term Expiring at theContinuing in Office Until Castle’s 2025 Annual Meeting of Stockholders.”

Frank Stokes has served as our Chief Financial Officer since December 2017. From January 2017 to December 2017, Mr. Stokes served as Chief Financial Officer of Hammock Pharmaceuticals, Inc., a specialty pharmaceutical company focused on the development and commercialization of women’s health and urology products. From May 2011 to December 2016, Mr. Stokes served as a Managing Director of Leerink Swann (now SVB Leerink). Mr. Stokes also held positions as a Managing Director at Robert W. Baird & Co. Incorporated and Wachovia Securities, LLC. While at SVB Leerink and Robert W. Baird & Co., Mr. Stokes led life sciences, tools and diagnostics sector investment banking efforts, and managed financings, and mergers and acquisitions transactions. Mr. Stokes serves as a director of Exagen Inc. (NASDAQ:XGN), as the chair of its audit committee. Mr. Stokes holds a B.S. degree in Business Administrationbusiness administration and J.D. and MBA degrees from the University of North Carolina at Chapel Hill.

Tobin W. Juvenalhas served as our Chief Commercial Officer since August 2020. Previously, he served as our Senior Vice President of Sales from October 2008 to August 2020. From December 2005 to June 2007, Mr. Juvenal served as Vice President of Sales of Encysive Pharmaceuticals Inc. Mr. Juvenal has also held management positions at deCODE Genetics, Genzyme Pharmaceuticals and Genetics Institute. Mr. Juvenal holds a B.S. degree in Marketing from the University of Florida.

Kristen M. Oelschlager R.N. has served as our Chief Operating Officer since April 2021. Previously, she served as our Chief Operations Officer from August 2020 to April 2021, our Senior Vice President of Clinical Operations from January 2018 to August 2020, our Vice President of Clinical Operations from 2013 to 2018 and our Executive Director of Operations from October 2008 to 2013. From May 1996 to September 2008, Ms. Oelschlager served as Director of Clinical Research of Arizona Pulmonary Specialists, where she managed a multi-specialty clinical research department. Ms. Oelschlager has co-authored multiple scientific publications and is a co-inventor of a number of our technologies. Ms. Oelschlager completed her core nursing requirements at Purdue University and holds an A.S. degree in Nursing from Indiana Vocational Technical College.


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SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT
The following table sets forth certain information regarding

Compensation Discussion and Analysis

In this section, we describe the ownership of the Company’s common stock as of March 31, 2022 by (i) eachmaterial components of our directors; (ii) eachexecutive compensation program for our NEOs, whose compensation is set forth in the Summary Compensation Table and other compensation tables contained in this Proxy Statement. We also provide an overview of our named executive officers; (iii) all ofcompensation philosophy and our current executive officers and directors as a group; and (iv) all those known by the Company to be beneficial owners of more than 5% of its common stock. Applicable percentages are based on 25,485,420 shares outstanding on March 31, 2022, adjusted as required by rules promulgated by the SEC. Except as otherwise noted below, the address for each person or entity listed in the table is c/o Castle Biosciences, Inc., 505 S. Friendswood Drive, Suite 401, Friendswood, Texas 77546.

Information with respect to beneficial ownership has been furnished by each director, officer or beneficial owner of more than 5% of our common stock or obtained from Form 4 and Schedules 13G and 13D filed with the SEC. We have determined beneficial ownership in accordance with the rules of the SEC. These rules generally attribute beneficial ownership of securities to persons who possess sole or shared voting power or investment power with respect to those securities.compensation program. In addition, we explain how and why our Compensation Committee arrived at the rules include shares of common stock issuable pursuant to the exercise of stock options or warrants that are either immediately exercisable or exercisable on or before May 30, 2022, which is 60 days after March 31, 2022. These shares are deemed to be outstanding and beneficially owned by the person holding those options or warrants for the purpose of computing the percentage ownership of that person, but they are not treated as outstanding for the purpose of computing the percentage ownership of any other person. Unless otherwise indicated, the persons or entities identified in this table have sole voting and investment power with respect to all shares shown as beneficially owned by them, subject to applicable community property laws.
Beneficial OwnerNumber of Shares Beneficially OwnedPercentage of Shares Beneficially Owned
Greater than 5% Stockholders
Wasatch Advisors, Inc.(1)
3,116,488 12.2 %
BlackRock, Inc.(2)
1,801,387 7.1 %
Directors and Named Executive Officers
Mara G. Aspinall(3)
59,919 *
Daniel M. Bradbury(4)
408,304 1.6 %
Kimberlee S. Caple— *
G. Bradley Cole(5)
48,576 *
Ellen Goldberg— *
Miles D. Harrison(6)
18,222 *
Tiffany P. Olson— *
Derek J. Maetzold(7)
1,029,218 4.0 %
Frank Stokes(8)
92,956 *
Kristen M. Oelschlager(9)
167,661 *
Tobin W. Juvenal(10)
76,580 *
All current executive officers and directors as a group (11 persons)(11)
1,901,436 7.3 %

*Represents beneficial ownership of less than 1%.
(1)Based on information reported in a Schedule 13G as of December 31, 2021, filed with the SEC on February 10, 2022, and consists of 3,116,488 shares of common stock held by Wasatch Advisors, Inc. (“Wasatch”). Wasatch has sole voting and dispositive power over the shares of common stock. The address of Wasatch is 505 Wakara Way, Salt Lake City, UT 84108.
(2)Based on information reported in a Schedule 13G as of December 31, 2021, filed with the SEC on February 4, 2022, and consists of 1,801,387 shares of common stock held by BlackRock, Inc. (“BlackRock”). BlackRock has sole voting and dispositive power over the shares of common stock. The address of BlackRock is 55 East 52nd Street, New York, NY 10055.
(3)Consists of (i) 30,848 shares of common stock and (ii) 29,071 shares of common stock issuable upon the exercise of stock options that are exercisable or will be exercisable within 60 days of March 31, 2022.
(4)Consists of (i) 185,252 shares of common stock held by BioBrit, LLC (“BioBrit”), (ii) 97,537 held by Daniel Bradbury Irrevocable Descendant’s Trust, (iii) 97,562 shares held by Annette Bradbury Irrevocable Descendant’s Trust and (iv) 27,953 shares of common stock issuable upon the exercise of stock options that are exercisable or will be exercisable within 60 days of March 31, 2022. Mr. Bradbury is the managing member of BioBrit and has voting and investment power of the shares held by BioBrit. The address of BioBrit is 2223 Avenida de la Playa, Suite 108, La Jolla, CA 92037. Mr. Bradbury and his spouse are trustees of Daniel Bradbury Irrevocable Descendant’s Trust, and their children are beneficiaries. Mr. Bradbury and his spouse are trustees of Daniel Bradbury Irrevocable Descendant’s Trust and Annette Bradbury Irrevocable Descendant’s Trust, and their children are beneficiaries.
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(5)Consists of 48,576 shares of common stock issuable upon the exercise of stock options that are exercisable or will be exercisable within 60 days of March 31, 2022.
(6)Consists of 18,222 shares of common stock issuable upon the exercise of stock options that are exercisable or will be exercisable within 60 days of March 31, 2022.
(7)Consists of (i) 720,938 shares of common stock held by Derek J. Maetzold, (ii) 55,603 shares of common stock held by DJM Grantor Retained Annuity Trust No. 2, (iii) 75,000 shares of common stock held by DJM Grantor Retained Annuity Trust No. 2, (iv) 137,965 shares of common stock held by the Derek Maetzold 2020 Irrevocable Trust, (v) 150,567 shares of common stock held by The Maetzold Descendants 2020 Trust and (vi) 30,545 shares of common stock held by The Maetzold 2018 Remainder Trust FBO Hannah Elizabeth Maetzold, (vii) 30,545 shares of common stock held by The Maetzold 2018 Remainder Trust FBO Peter Douglas Maetzold, (viii) 30,545 shares of common stock held by The Maetzold 2018 Remainder Trust FBO Emily Carol Kirk, (ix) 30,545 shares of common stock held by The Maetzold 2018 Remainder Trust FBO John Derek Maetzold and (x) 308,280 shares of common stock issuable upon the exercise of stock options that are exercisable or will be exercisable within 60 days of March 31, 2022. Mr. Maetzold is a trustee and beneficiary of the DJM Grantor Retained Annuity Trust No. 2 and DJM Grantor Retained Annuity Trust No. 3. Mr. Maetzold’s spouse is trustee of The Maetzold Descendants 2020 Trust and his spouse, and their children are beneficiaries. Mr. Maetzold is trustee of the Derek Maetzold 2020 Irrevocable Trust, The Maetzold 2018 Remainder Trust FBO Hannah Elizabeth Maetzold, The Maetzold 2018 Remainder Trust FBO Peter Douglas Maetzold, The Maetzold 2018 Remainder Trust FBO Emily Carol Kirk and The Maetzold 2018 Remainder Trust FBO John Derek Maetzold and his children are beneficiaries.
(8)Consists of (i) 7,661 shares of common stock and (ii) 85,295 shares of common stock issuable upon the exercise of stock options that are exercisable or will be exercisable within 60 days of March 31, 2022.
(9)Consists of (i) 99,181 shares of common stock and (ii) 68,480 shares of common stock issuable upon the exercise of stock options that are exercisable or will be exercisable within 60 days of March 31, 2022.
(10)Consists of (i) 5,349 shares of common stock and (ii) 71,231 shares of common stock issuable upon the exercise of stock options that are exercisable or will be exercisable within 60 days of March 31, 2022.
(11)Consists of the shares described in footnotes (3) through (10).

DELINQUENT SECTION 16(a) REPORTS

Section 16(a) of the Exchange Act requiresspecific compensation decisions involving our directors and executive officers, and persons who own more than ten percent of our common stock, to file with the SEC initial reports of ownership and reports of changes in beneficial ownership of our common stock.
Based on a review of Form 3 and Form 4 filings with the SEC and representations received from our current directors and executive officers that no Form 5 filings are required, we believe that all Section 16(a) requirements were met with respect to the fiscal year ended December 31, 2021, except as follows: one Form 4 for Derek J. Maetzold covering three transactions and one Form 4 for Daniel M. Bradbury covering four transactions were each filed late on August 6, 2021.
EXECUTIVE COMPENSATION
Named Executive Officers
Our named executive officersNEOs for the fiscal year ended December 31, 2021,2022.

We are a smaller reporting company under applicable SEC rules and regulations, and are not required to include a Compensation Discussion and Analysis (“CD&A”) in this Proxy Statement. However, we believe providing this CD&A on a voluntary basis provides our stockholders with valuable information regarding our executive compensation practices. This CD&A provides an overview of our executive compensation philosophy, the objectives of our executive compensation program and each material element of compensation that we provide to our executive officers. In addition, we explain how and why our Compensation Committee arrived at specific compensation policies and decisions involving our NEOs for the year ended December 31, 2022. This CD&A is intended to be read in conjunction with the immediately following tables, which include historical context for certain elements of compensation.

NAMED EXECUTIVE OFFICERS

Our NEOs for the fiscal year ended December 31, 2022, which consist of our principal executive officer (“PEO”), principal financial officer and the twoour only other most highly compensated executive officers, are:

Derek J. Maetzold, our President and Chief Executive Officer;
Frank Stokes, our Chief Financial Officer;
Tobin W. Juvenal, our Chief Commercial Officer; and
Kristen Oelschlager, our Chief Operating Officer.
For the fiscal year ended December 31, 2021, Mr. Juvenal and Ms. Oelschlager each earned the same amount of total compensation and therefore we have determined that both are named executive officers.
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Summary Compensation Table
Name and principal positionYearSalary
($)
Bonus
($)(1)
Option awards
($)(2)
Stock
awards
($)(2)
Non-equity Incentive Plan Compensation
($)(3)
All other compensation
($)(4)
Total
($)
Derek J. Maetzold2021625,000 — 2,656,954 2,500,003 722,500 17,400 6,521,857 
President and Chief Executive Officer2020550,000 — 3,056,657 1,268,982 457,600 11,400 5,344,639 
Frank Stokes2021450,000 4,500 1,062,350 999,993 289,800 58,708 2,865,351 
Chief Financial Officer2020400,000 4,000 1,087,530 473,280 208,000 44,257 2,217,067 
Tobin W. Juvenal2021425,000 8,500 1,062,350 999,993 273,700 17,400 2,786,943 
Chief Commercial Officer
Kristen Oelschlager, R.N.2021425,000 8,500 1,062,350 999,993 273,700 17,400 2,786,943 
Chief Operating Officer

(1)Represents the discretionary portion, if any, of the performance-based cash bonuses earned

Derek J. Maetzold, our President and CEO;

Frank Stokes, our Chief Financial Officer;

Tobin W. Juvenal, our Chief Commercial Officer; and

Kristen M. Oelschlager, our Chief Operating Officer.

BUSINESS OVERVIEW

Our commercially available proprietary tests focus on answering clinical questions arising during the year and paid subsequent to year end, as further described below under “—Performance Bonus Compensation.”

(2)These columns set forthtreatment of:

Dermatologic cancers—DecisionDx®-Melanoma, DecisionDx®-SCC, and MyPath® Melanoma

Uveal melanoma—DecisionDx®-UM

Barrett’s esophagus—TissueCypher® Barrett’s Esophagus Test

Mental health diagnoses—IDgenetix®

Together, we believe these commercial products support an estimated total addressable market of $8.0 billion in the aggregate grant date fair valueUnited States.

Our Test Portfolio

Currently, our revenue is primarily generated by our DecisionDx-Melanoma risk stratification test for cutaneous melanoma, although each of option awards and stock awards, without regard to forfeitures, granted during the year measured pursuant to Financial Accounting Standards Board Accounting Standards Codification Topic 718 (“ASC 718”). The valuation assumptions we used in calculating the fair value of options are set forth in Note 14our other commercial tests do contribute to our consolidated financial statements appearingoverall revenue. We map out the patient journey of diagnostic test services as starting with (i) screening of healthy individuals, to (ii) supporting diagnostic clarity in patients with signs or symptoms of disease, to (iii) risk stratification or prognosis, to (iv) response to treatment for specific treatment selection and to (v) minimal residual disease/recurrence monitoring. We currently focus our Annual Reportinvestments on Form 10-K for the fiscal year ended December 31, 2021. Noteinnovative test services that the amounts reported in this column reflect the accounting value of these awards and do not correspond to the actual economic value that ultimately may be realized by our named executive officers.

(3)Amounts reported represent performance-based cash bonuses earned during the year and paid subsequent to year end, as further described below under “—Performance Bonus Compensation,” excluding the discretionary portion includedassist in the Bonus columnfollowing areas along the patient journey: providing diagnostic clarity in patients with signs or symptoms of the table above.
(4)The amount reported for Mr. Maetzold for 2021 reflects $17,400 in 401(k) matching contributions. The amount reported for Mr. Stokes for 2021 reflects $48,541 paid by the Companydisease, risk stratification and response to reimburse Mr. Stokes for the cost of vehicle lease payments, lodging, commercial air traveltreatment. We have six commercially available proprietary tests that assist clinicians and parking attributable to commuting from his home in Charlotte, North Carolina to our offices in Friendswood, Texas and $10,167 in 401(k) matching contributions. Mr. Stokes did not participate in the 401(k) plan during 2020. The amounts reported for Mr. Juvenal and Ms. Oelschlager for 2021 reflects $17,400 in 401(k) matching contributions.
Narrative Disclosure to Summary Compensation Table
In reviewingpatients along this section, please note that we are a smaller reporting company and are not required to provide a “Compensation Discussion and Analysis” of the type required by Item 402 of Regulation S-K. The disclosure in this section is intended to supplement the SEC-required disclosure and it is not a continuum.

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Compensation Discussion and Analysis.Analysis

2022 Performance Highlights

$137.0 million in revenue, 46% year-over-year growth

44,419 delivered test reports, 58% year-over-year growth

As of December 31, 2022, cash and cash equivalents of $122.9 million and $135.7 million of marketable investment securities

Publication of 14 peer-reviewed studies across all franchises

Addition of mental health franchise with acquisition of AltheaDx in April 2022

SUMMARY OF OUR EXECUTIVE COMPENSATION PROGRAM

Our compensation program is designed to compensate our executive officers fairly based upon an assessment of compensation available in the marketplace where we compete for executive personnel and our desire to achieve a balance of short-term and long-term rewards for maintaining and improving Company performance and stockholder value. It is administered by our Compensation Committee.

We believe our compensation program has assisted us in achieving strong performance for our customers, employees and stockholders. For example, during 2022, we generated total annual revenues ($137.0 million) above the target level ($115.0 million) established under our short-term incentive compensation program for 2022. Our revenue goal category results, along with our success with each of our other goal categories resulted in a bonus payout for our CEO of 137.5% of the target bonus opportunity based on corporate performance objectives. Actual bonuses paid to the other NEOs ranged from 132% to 136% of the target bonus opportunity. See “Annual Performance-Based Cash Bonuses” below for more information. In addition, based on stockholder feedback, in December 2022 we granted each of our NEOs performance-based restricted stock units (“PSUs”) that vest contingent upon the achievement of a two-year cumulative revenue target representing 50% of the annual equity award for our CEO and 25% for our other NEOs. See “Performance-Based Equity Incentive Awards” for more information.

We are strongly committed to a pay for performance culture which includes using cash incentives to reward in-year execution as well as long-term incentives that increase in value as the stock price improves. For 2022, 51% of our CEO’s compensation was tied to performance via cash incentives and PSUs. We compete for talent in a highly competitive industry that requires specific expertise to innovate, test and gain approval for our products in a safe manner for patients. Our compensation policies seek to balance near-term execution with long-term performance to ensure appropriate risk taking given the highly regulated industry we operate within.

Our approach to establishing executive compensation is to examine a variety of factors including market data, experience, role, history, internal pay parity, affordability and individual performance. Market-based ranges for each position, and an executive officer’s positioning within that range, inform the Compensation Committee’s determination of overall compensation within a competitive market range. The material elements of our executive compensation program in 2022 included:

Base salary, which provides a stable means of cash compensation designed to provide competitive compensation that reflects the contributions and skill levels of each executive officer;

Short-term incentive compensation, consisting of our annual cash bonus program where payouts are earned based upon both objective measures (as shown below under “Annual Performance-Based Cash Bonuses”) and a subjective assessment of annual performance, which in both cases is designed to encourage and reward the accomplishment of goals intended to benefit the Company and its stockholders; and

Long-term incentive compensation, consisting of a mix of stock-based awards designed to reward performance over a period of time and to tie a portion of executive compensation more directly to the creation of long-term stockholder value. Based on consideration of stockholder feedback we received and peer-group benchmarks, we introduced PSUs that vest upon the achievement of specified performance criteria and a specific service period into the long-term incentive component of our 2022 executive compensation program.

Our executive compensation program is designed to link a significant portion of the compensation of our executive officers to defined performance standards that we believe properly incentive our executive officers to strive for near-term earnings and returns as well as growth in long-term stockholder value.

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Annual Base Salary

Compensation Discussion and Analysis

EXECUTIVE COMPENSATION PHILOSOPHY AND OBJECTIVES

We have designed our executive compensation program to attract, retain, and motivate our executive officers, including our NEOs, by offering competitive compensation packages consisting of a base salary, an annual cash bonus, and long-term equity incentive awards, at a level consistent market trends and industry data that we believe allows us to compete for the best talent in the highly-competitive environment in which we operate.

We believe the approach that has been adopted by our Compensation Committee (upon the recommendation of Aon, our independent compensation consultant), with its emphasis on variable cash compensation, time-based equity awards, and performance-based equity awards, enables us to attract top talent, motivate successful short-term and long-term performance, satisfy our retention objectives, and align the compensation of our executive officers with our performance and long-term value creation for our stockholders.

2022 STOCKHOLDER OUTREACH

The Board is committed to sound corporate governance, which we believe requires feedback from our stockholders to inform the Board’s decisions and guide our overall approach to governance. Our stockholder outreach in 2022 provided the Board with valuable insights into our stockholders’ perspectives on our executive compensation program and other matters of importance. We endeavor to maintain sound compensation and corporate governance practices and will continue to evaluate our compensation program to further align our executive compensation program with the long-term interests of our stockholders. We are committed to understanding stockholders’ perspectives and anticipate ongoing stockholder outreach.

For many years, we followed a consistent approach to the design of our executive compensation program. At our 2022 annual meeting of stockholders, we asked our stockholders to indicate their support for the compensation of our named executive officers by casting a non-binding, advisory vote “FOR” such compensation as described in the proxy statement (commonly known as a “Say-on-Pay” proposal). Our inaugural Say-On-Pay proposal received the support of approximately 41% of the votes cast, and we were disappointed with the outcome. In response, in order to better understand investor concerns, we conducted a robust, Board-driven stockholder outreach and engagement program in the fall of 2022, which informed the Board’s decisions for 2023.

Prior to the 2022 annual meeting of stockholders, we engaged Morrow Sodali to assist our Board with certain governance matters. Following the low support on our Say-on-Pay vote, we expanded the engagement of Morrow Sodali to help facilitate a direct stockholder outreach program. We initiated our stockholder outreach in the fourth quarter of 2022 to specifically gain input on the Say-on-Pay vote and gain feedback on our compensation program. During this process, we reached out to our 25 largest stockholders, representing 57% of our then-outstanding common stock. We held discussions with 10 of the 25 largest stockholders, representing 36% of our then-outstanding common stock. The other 15 stockholders, representing 21% of our then-outstanding common stock, either declined to meet with us or did not respond. In addition to executive compensation, we discussed a broad range of other ESG topics, which we have reviewed and discussed with the Board. These stockholder discussions were led by our Board Chair and/or Compensation Committee Chair. Certain members of the executive management team also participated on the calls, including our CEO and our Vice President, Investor Relations & Corporate Affairs.

In 2022, these discussions covered a wide range of topics, including:

Executive compensation

Director time commitment

Board diversity

Enhancement to proxy disclosures

Board structure

Conflicts of interest

After considering stockholder feedback which was gathered in the fall 2022, as well as input from management and based in part on the Compensation Committee’s independent compensation consultant, the Compensation Committee approved significant changes to our executive compensation program that were implemented the changes in late 2022 and early 2023. These changes included expanding our executive compensation disclosure in our proxy statement beyond the scaled disclosure required of smaller reporting companies and discussing the material principles underlying Castle’s executive compensation policies and decisions and the most important factors relevant to analysis of those policies and decisions; including performance-based equity incentive awards in the compensation package for our executive officers, adoption of a Clawback Policy, adoption of stock ownership guidelines for our directors and executive officers and adoption of a policy on director time commitment, each of which are outlined in more detail in this Proxy Statement. The Compensation Committee will continue to consider stockholder feedback, and the outcomes of future Say-on-Pay votes when evaluating our executive compensation programs and practices and making compensation decisions for our executive officers.

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Compensation Discussion and Analysis

Stockholder Feedback and Board Responsiveness

What We Heard

How We Responded

Desire to see expanded disclosure of our compensation philosophy, design and rationale.

We voluntarily included a “Compensation Discussion and Analysis” section in this Proxy Statement to provide greater insight into our executive compensation program and our compensation philosophy, and the rationale behind compensation decisions for our NEOs, including the following disclosures:

  Enhanced disclosure of our compensation decision process

  Disclosure of the peer group we reference when making compensation decisions

  Additional detail on our short-term incentive award compensation structure and calculation

Desire to have performance-based equity included in the compensation package

We have incorporated performance-based equity awards into the long-term incentive compensation for our NEOs representing 50% of the total equity award value for our CEO and 25% for our other NEOs for 2022.

Desire for our board of directors to adopt a clawback policy

We adopted our Clawback Policy in January 2023, which applies to all executive compensation that is granted, earned or vested based on Castle’s attainment of financial reporting measures.

Desire for stock ownership guidelines

We adopted our Stock Ownership Guidelines in January 2023 for our directors and “Section 16” officers.

Desire to adopt a policy on director time commitments

We adopted our Director Time Commitment policy in January 2023.

COMPENSATION COMMITTEE OVERSIGHT OF COMPENSATION-RELATED RISKS

Our Compensation Committee is responsible for oversight of the risks associated with and potential consequences of Castle’s compensation policies and practices and assessing whether additional policies and practices are needed to appropriately mitigate these risks and consequences. In addition to this risk oversight role, our Compensation Committee is responsible for evaluating and approving (or, if it deems appropriate, making recommendations to the Board regarding) Castle’s compensation plans and programs, including the modification or termination of existing plans and programs, and oversight of Castle’s overall compensation strategy and policies. We have committed to numerous practices and safeguards to ensure our compensation practices align the interests of our executive officers and stockholders, including:

What We Do:

Pay-for-performance philosophy and culture. Our executive compensation program is designed to align incentive-based compensation with Company performance.

Significant Portion of “At-Risk” Executive Compensation is Performance-Based. Under our executive compensation program for 2022, 51% of the CEO’s and 29% of each other NEO’s total compensation reported in the Summary Compensation Table consisted of performance-based cash bonuses and PSUs and was therefore “at risk,” which we believe aligns their short- and long-term interests with of those of our stockholders.

Independent Compensation Committee. The Compensation Committee is comprised solely of non-employee directors who satisfy applicable Nasdaq and SEC independence requirements.

Independent Compensation Advisor Reports Directly to the Compensation Committee. The Compensation Committee engages its own compensation consultant to assist with making compensation decisions.

Stock Ownership Guidelines for Directors and Officers. Our Board adopted Stock Ownership Guidelines that require minimum ownership of our common stock by our directors, CEO and other Section 16 officers. See below under, “Other Compensation Policies and Practices—Stock Ownership Guidelines” for details.

Multi-Year Vesting Requirements for Retention and Long- and Short-Term Alignment. The equity awards granted to our executive officers generally vest over multiple years, consistent with current market practice and our retention objectives.

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Compensation Discussion and Analysis

Annual Say-on-Pay Vote. We hold an annual Say-on-Pay vote to allow our stockholders to approve, on an advisory basis, the compensation of our NEOs.

Active Stockholder Outreach. We proactively engage with our stockholders throughout the year.

Clawback Policy. Our Clawback Policy enables us to recover any incentive compensation granted, vested or paid to an executive officer during the three (3) completed fiscal years immediately preceding the date we are required to prepare an accounting restatement. More detail is provided below under, “Other Compensation Policies and Practices—Clawback Policy”

Prohibit Hedging or Pledging. Our insider trading policy prohibits our employees (including executive officers) and directors from engaging in hedging or short-term speculative transactions involving our securities. More detail is provided below under, “Other Compensation Policies and Practices—Prohibition on Hedging, Short Sales and Pledging.”

Minimize Inappropriate Risk Taking. Our executive compensation program is weighted toward long-term incentive compensation to discourage short-term risk taking, and includes goals that are quantifiable with objective criteria, multiple performance measures and caps on short-term incentive compensation.

Competitive Peer Group. Our Compensation Committee selects our peers from publicly traded biotechnology companies that have a comparable market capitalization, revenue, headcount, and research focus.

What We Don’t Do:

No Special Health or Welfare Benefits for Executives. Our executive officers participate in broad-based, Company-sponsored health and welfare benefits programs on the same basis as our other full-time, salaried employees.

No Excessive Perquisites. As a matter of business philosophy, we offer limited perquisites to our executive officers.

No Post-Employment Tax Gross-Ups. We do not provide any post-employment tax reimbursement payments (including “gross-ups”) on any severance or change-in-control payments or benefits.

No Single-Trigger Acceleration of Equity Awards Upon a Change-in-Control. We use double-trigger accelerated vesting of equity awards in the event of a change in control.

Our Compensation Committee has reviewed our compensation policies and practices to assess whether they encourage our employees, including our NEOs, to take inappropriate risks. Our Compensation Committee believes that the mix and design of the elements of compensation, individually or in their entirety, do not encourage our employees, including our NEOs, to take inappropriate risks. The mix of fixed and variable compensation prevents undue focus on short-term results and is intended to align the long-term interests of our NEOs and our other participating employees with those of our stockholders.

COMPENSATION DETERMINATION PROCESS

Role of Compensation Committee

Our Compensation Committee oversees our compensation policies, plans and benefits programs and reviews and approves (or makes recommendations to our Board regarding) the compensation of our executive officers and our major compensation plans, policies and programs and assesses whether our compensation structure establishes appropriate incentives for officers and employees. The Compensation Committee conducts an annual review of all components of executive compensation for our executive officers and may approves the compensation for all executive officers other than our CEO, for whom it recommends elements of compensation and overall bonus achievement to the independent members of our Board for approval. The Compensation Committee also reviews and recommends non-employee directors’ compensation to the full Board on an annual basis. The Compensation Committee has the sole authority to select, retain, terminate and approve the fees and other retention terms of consultants as it deems appropriate to perform its duties.

Role of Management

Castle’s CEO is involved in the design and implementation of our executive compensation program and is typically present at Compensation Committee meetings, except that the CEO is not present during any voting or deliberations on his compensation. In 2022, the CEO reviewed the analysis and recommendations of Aon with the Compensation Committee and made recommendations to the Compensation Committee regarding proposed salary, cash bonus opportunities and equity awards for our officers (other than himself). The Compensation Committee exercises its discretion in accepting, rejecting and/or modifying any such executive compensation recommendations, or may, if it deems appropriate, make a recommendation to the Board regarding the matter.

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Compensation Discussion and Analysis

Role of Independent Compensation Consultant

The Compensation Committee retains an independent compensation consultant in order to provide professional expertise regarding a variety of executive compensation and market practices. The independent consultant assists the Compensation Committee in setting compensation and designing a comprehensive plan. In 2022, the Compensation Committee retained Aon to provide the Compensation Committee with the following services, focusing on all compensation components.

In 2022, Aon assisted the Compensation Committee with, among other things:

Reviewing and modifying the compensation peer group;

Providing executive and director market pay analysis to inform policy direction;

Developing executive and director pay programs;

Evaluating equity pay market trends and dilution;

Making recommendations with respect to change in control and severance arrangements; and

Reviewing certain proxy disclosures, including this CD&A.

The Compensation Committee annually evaluates the independent compensation consultant’s independence and performance under the applicable SEC and Nasdaq listing standards. The Compensation Committee believes that working with an independent compensation consultant furthers our objectives to recruit and retain qualified executives, align their interests with those of stockholders and ensure that their compensation packages will appropriately motivate and reward ongoing achievement of our corporate objectives. The Compensation Committee conducted a specific review of its relationship with Aon in 2022, pursuant to applicable SEC rules and Nasdaq listing standards, and concluded that Aon’s work for the Compensation Committee did not raise any conflicts of interest.

Use of Competitive Data

To assess the competitiveness of our executive compensation program and compensation levels, our Compensation Committee, with the assistance of Aon, examines the competitive compensation data for senior executives of our peer companies, including total compensation and each element of compensation. The Compensation Committee uses a peer group to reference recent market data and understand the marketplace. However, the Compensation Committee also recognizes the importance of considering other factors as well, such as individual performance, experience, history and scope of responsibility, current market conditions and the specific needs of the business at critical points in time. The Compensation Committee uses its best business judgment in setting executive compensation and uses peer group data as a reference point. The Compensation Committee conducts an annual assessment of the peer group in order to ensure that it reflects Castle’s most current financial and sector-specific standing.

Peer Group Selection and Market Analysis

The Compensation Committee engaged its independent compensation consultant, Aon, to provide competitive compensation information including pay levels, trends and mix, to inform the design of our 2022 executive compensation program. Working with the Compensation Committee, Aon constructed a peer group for Castle, after reviewing general industry data, industry-specific data and public available information in proxy statements and other SEC filings. The objective was to identify companies representing Castle’s broad labor market for talent while maintaining comparability, having sufficient group size to avoid distortions from a single company, and ensuring sufficient and credible data are available. The peer groups outlined below are a result of this work.

When reviewing competitive market data, the Compensation Committee examines the range of market data but does not set a specific targeted percentile as part of its compensation philosophy. An executive’s positioning against the competitive labor market is intended to reflect that executive’s experience, marketability and performance over a period of time. While the Compensation Committee uses competitive benchmarking in determining appropriate compensation ranges, the Compensation Committee generally determinedavoids making “automatic” adjustments based solely on an employee’s positioning relative to the market. The Compensation Committee believes this approach better utilizes competitive data to facilitate, rather than dictate, the Company’s compensation decisions, which results in appropriate recognition of our top performers.

Depending on whether the Company and an individual’s performance exceed the specified performance criteria, realized total compensation during any given year may be above or below the benchmark compensation levels. The amount and structure of compensation can also vary by executive due to negotiations and competitive pressures inherent in attracting and hiring experienced diagnostic managerial talent. To help attract and retain such talent, the Compensation Committee also seeks to provide an appropriate level of employee benefits comparable to those in the diagnostics industry and to publicly traded companies.

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Compensation Discussion and Analysis

Each year, Aon reviews the external market data and evaluates the composition of our peer group to ensure it appropriately reflects our growth, the increase in our revenues and market capitalization and the consolidation in our industry.

2022 Peer Group

When the Compensation Committee approved the industry peer group for 2022 (the “2022 Peer Group”), Castle was at the 11th percentile for revenue and its growth rate was above the group median. Since our revenue growth rate exceeded the peer group median, we sought to have a peer group with a median revenue of approximately $125 million to consider our higher revenue growth rate and expectations at the time for 2022. Our market capitalization at the time of peer group approval was close to the 40th percentile.

In the fall of 2021, with the assistance of Aon, the Compensation Committee considered companies:

in the life sciences industry (specifically molecular diagnostic companies, biotechnology and select pharmaceutical companies), life sciences tools, health equipment and supplies as a reflection of the talent market;

with revenues of approximately three-fourths (0.75x) to five times (5x) our then-projected revenue (when rounded, this resulted in a range of $75 million to $450 million in revenue); and

with market value of approximately one-half (0.5x) to three times (3x) our market capitalization at the time (resulting in a range of between $900 million to $6 billion in market capitalization).

The 2022 Peer Group consisted of the 20 companies listed in the table below. At the time the Compensation Committee approved the 2022 Peer Group, we were at approximately the 40th percentile for market capitalization among the 2022 Peer Group, approximately the 11th percentile for revenue and above the 50th percentile for annual revenue growth. The Compensation Committee considered this a reasonable balance and a good representation of companies that were of similar scope and complexity.

The companies comprising the 2022 Peer Group selected by Aon and approved by the Compensation Committee are listed below:

Axonics, Inc.

CareDx, Inc.Codexis, Inc.Enanta Pharmaceuticals, Inc.Guardant Health, Inc.

Intersect ENT, Inc.

Invitae CorporationiRhythm Technologies, Inc.NanoString Technologies, Inc.Natera, Inc.

NeoGenomics, Inc.

OraSure Technologies, Inc.Pacific Biosciences of California, Inc.Personalis, Inc.Quanterix Corporation

ShockWave Medical, Inc.

Silk Road Medical, Inc.Twist Bioscience CorporationVapotherm, Inc.Veracyte, Inc.

Changes from Prior Peer Group

Added for 2022

Removed for 2022

Codexis, Inc.

Flexion Therapeutics, Inc.

Guardant Health, Inc.

Fluidigm Corporation

iRhythm Technologies, Inc.

GenMark Diagnostics, Inc.

NeoGenomics, Inc.

Luminex Corporation
Meridian Bioscience, Inc.

The 2022 Peer Group was used by the Compensation Committee to help inform all 2022 compensation decisions, except for the grant of equity-based incentive awards in December 2022, which used the industry peer group for 2023 (the “2023 Peer Group”) that is described below. The Compensation Committee has historically granted annual equity-based incentive awards in December each year and typically has used the most recently approved peer group at the time to assist in determining those annual grants.

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2023 Peer Group

In the fall of 2022, the Compensation Committee updated the peer group for 2023. Specifically, with the assistance of Aon, the Compensation Committee considered companies:

in the life sciences industry (specifically molecular diagnostic companies, biotechnology and select pharmaceutical companies), life sciences tools, health equipment and supplies as a reflection of the talent market;

with revenues of approximately three-fourths (0.75x) to five times (5x) our then-projected revenue (when rounded, this resulted in a range of $100 million to $700 million in revenue); and

with market value of approximately one-half (0.5x) to four times (4x) our market capitalization at the time (resulting in a range of between $300 million to $2.5 billion in market capitalization).

The 2023 Peer Group consists of the 17 companies listed in the table below. At the time the Compensation Committee approved the 2023 Peer Group, we were at approximately the 25th percentile for market capitalization among the 2023 Peer Group, approximately the 20th percentile for revenue and above the 90th percentile for annual revenue growth. The Compensation Committee considered this a reasonable balance and a good representation of companies that were of similar scope and complexity.

The companies comprising the 2023 Peer Group selected by Aon and approved by the Compensation Committee are listed below:

Adaptive Biotechnologies Corporation

Axonics, Inc.CareDx, Inc.Codexis, Inc.Guardant Health, Inc.

Invitae Corporation

iRhythm Technologies, Inc.NanoString Technologies, Inc.Natera, Inc.NeoGenomics, Inc.

OraSure Technologies, Inc.

Pacific Biosciences of California, Inc.Quanterix CorporationShockWave Medical, Inc.Silk Road Medical, Inc.

Twist Bioscience Corporation

Veracyte, Inc.

Changes from Prior Peer Group

Added for 2023

Removed for 2023

Adaptive Biotechnologies Corporation

Enanta Pharmaceuticals, Inc.
Intersect ENT, Inc.
Personalis, Inc.
Vapotherm, Inc.

As noted above, the Compensation Committee used the 2023 Peer Group to assist in determining the grant of equity-based incentive awards in December 2022. Further, the 2023 Peer Group has been used to help inform all 2023 compensation decisions to date.

ELEMENTS OF OUR EXECUTIVE COMPENSATION PROGRAM

To maintain a competitive and comprehensive overall compensation package, we utilize three primary compensation elements to reward our executives: base salary, short-term annual cash bonuses, and long-term equity compensation. When setting our compensation program, we focus on motivating our executive officers to lead our entire organization toward achieving both short-term and long-term strategic, financial and operational goals, and increasing stockholder value, without encouraging excessive risk-taking.

Base Salaries

Base salaries serve to provide fixed cash compensation to our executive officers for performing their ongoing responsibilities. Base salaries for our executive officers are approved by the Compensation Committee upon employment, and are reviewed and adjusted, as appropriate, by the Compensation Committee on an annual basis, based on consideration of various factors, including:

The individual’s role and responsibilities;

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Compensation Discussion and Analysis

Individual contribution and performance over the past year;

Overall experience and expertise;

Current Castle base salary;

Labor market conditions;

Inflation;

Corporate performance;

Succession planning; and

Salaries for similar positions within our industry.

Our Compensation Committee and, with respect to our CEO, the independent members of the Board, approved the following base salaries for our NEOs for fiscal 2021 and 2022. The below increases were in line with the general policies implemented across the Company in setting pay increases for 2022, which also took into consideration the elevated levels of general inflation.

Named Executive Officer

  

2021

Base Salary

   

2022

Base Salary

   % Change 

Derek J. Maetzold

  $625,000   $660,000    5.6

Frank Stokes

  $450,000   $470,000    4.4

Tobin W. Juvenal

  $425,000   $455,000    7.1

Kristen M. Oelschlager

  $425,000   $455,000    7.1

Annual Performance-Based Cash Bonuses

Annual performance-based cash bonuses are designed to provide our NEOs with appropriate incentives to achieve defined annual performance goals. Payments under our annual cash bonus program are primarily based on the achievement of corporate performance goals pre-established by our Board. Goals are typically approved in the first quarter and are designed to incentivize focus and strong execution on the part of the leadership team. Actual performance against these performance goals funds the annual bonus plan pool and threshold levels of performance must be met for the pool to be funded. Each of our NEOs participated in our 2022 annual cash bonus program. Executive officers who participate in this plan have a pre-established threshold, target and maximum cash bonus award opportunities, expressed a percentage of their base salary. For 2022, our NEOs had the annual cash bonus opportunities set forth in the table below.

   

Payout Opportunities

(as a percentage of base salary)

 

Named Executive Officer

  Threshold  Target  Maximum 

Derek J. Maetzold

   44.6  85.0  129.6

Frank Stokes

   26.0  50.0  75.0

Tobin W. Juvenal

   26.0  50.0  75.0

Kristen M. Oelschlager

   26.0  50.0  75.0

Payouts for the annual performance-based cash bonus are also based on the achievement of individual performance goals, other than for Mr. Maetzold, whose cash bonus award opportunity is based 100% on corporate performance goals. For the other NEOs, 80% of their cash bonus award opportunity is based on the achievement of corporate performance goals, with the remaining 20% based on individual performance goals. The individual performance factor can then be adjusted by a multiplier—up or down—depending upon the Compensation Committee’s assessment. The individual performance multipliers for the other NEOs are the same multipliers used for all other Castle employees. The Compensation Committee assesses the individual performance factor attainment that determines this component (taking into consideration the assessment by the CEO) for the other NEOs. The Compensation Committee then makes a recommendation to the independent members of the board for review and approval. Payments related to the achievement of directors, basedindividual performance goals over the target level are reported as a discretionary bonus, as discussed further below.

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Compensation Discussion and Analysis

In January 2023, the independent members of our Board, on the recommendation of the Compensation Committee, certified the achievement of our boardcorporate performance goals for the 2022 annual bonus plan as follows:

Goal Category

  Corporate Performance
Goals
  Target  Actual  Target
Weighting
  Actual
Weighting
 

Revenue

  Revenue for the year ended December 31, 2022  $115.0 million  $137.0 million   50.0  90.0%(1) 

New Products

  

  Achievement of DecisionDx-SCC report volume

 

  Achievement of TissueCypher new ordering clinicians

  

  DecisionDx-SCC: 5,901 report volume

 

  TissueCypher: New ordering clinicians 280

  

  DecisionDx-SCC: 5,967 report volume

 

  TissueCypher: 456 new ordering clinicians

   20.0  22.5%(2) 

Reimbursement

  

  Achievement of certain reimbursement rates for DecisionDx-Melanoma, DecisionDx-UM and MyPath Melanoma

 

  Certain commercial coverage achievements related to Castle’s proprietary tests

  

  Achieve specified reimbursement rates

 

  Achieve positive medical policy for a specified number of payers

  

  Specified reimbursement rates achieved

 

  Positive medical policy achieved for the specified number of payers

   20.0  20.0%(3) 

Pipeline

  

  Project 1 (Inflammatory Skin Disease)

 

  Project 2

  Number of active centers and/or patient enrollment  

  Project 1- Achieved

 

  Project 2 - Not Achieved

   10.0  5.0%(4) 
         100.0  137.5

(1)

The Compensation Committee used a sliding scale of revenue performance ranging from $105.0 million to $144.0 million to determine the actual weighting. The Compensation Committee used a sliding scale rather than a fixed threshold in order to better align the actual bonus payouts to the actual level of revenues, given the wide range of possible results. All points on this scale represent an increase in revenue performance from the prior year. With respect to the target level of performance of $115.0 million, this represented a 22.2% increase in performance compared to the prior year. The applicable weightings could have ranged from 0% (for below threshold performance) to 100.0% (for maximum performance) depending on revenue performance. The threshold performance of $105.0 million would have resulted in a weighting of 17.5% for the revenue component. Achievement of the target level of revenue of $115.0 million would have resulted in a weighting of 50.0%. Actual revenue for 2022 of $137.0 million corresponded to an actual weighting of 90.0%.

(2)

Actual weighting could have ranged between 0% (for below threshold performance of all components) and 22.5% (for maximum performance of all components). The threshold performance level for both components of this category would have resulted in a weighting of 10.0%. The target level of performance for report volume of DecisionDx-SCC of 5,901 represented an increase of 68.1% in report volume from the prior year. The above target actual outcome was based upon the actual performance of TissueCypher new ordering clinicians, which was 62.8% above target.

(3)

Actual weighting could have ranged between 0% (for below threshold performance of all components) and 20.0% (for target performance of all components). The threshold performance level for both components would have resulted in a weighting of 17.5%. The actual outcome was based on objectively determinable information with respect to achievement of specified reimbursement rates and a specified number of payers for which a positive medical policy was achieved. No discretion was applied by the Compensation Committee. We are not disclosing the specific targets or specific actual outcomes of these metrics because we believe it would provide our competitors with insight into our internal confidential strategic operations and planning processes and could cause us competitive harm.

(4)

Actual weighting could have ranged between 0% (for below threshold performance of all components) and 10.0% (for target performance of all components). The threshold performance level for both components would have resulted in a weighting of 7.5%. The actual outcome was based on objectively determinable information with respect to the number of patients enrolled and number of active centers. No discretion was applied by the Compensation Committee. We are not disclosing the specific targets or specific actual outcomes of these metrics because we believe it would provide our competitors with insight into our internal confidential strategic operations and planning processes and could cause us competitive harm.

The Compensation Committee selected these corporate performance goals and this incentive structure in order to measure a variety of directors.key drivers of Castle’s performance that it expects to contribute to Castle’s long-term growth. The 2021 annual base salariesCompensation Committee believes that the revenue metric represents the most important of these metrics due to its importance to our financial results and its use by investors in understanding our business. Revenue also represents a culmination of our efforts across multiple initiatives, including the effectiveness of our sales and marketing efforts and achieving reimbursement milestones. Therefore, the revenue metric received the greatest weight.

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Compensation Discussion and Analysis

The individual performance of the NEOs (other than the CEO) was also certified by the Compensation Committee, after consideration of feedback from the CEO, and was set at 110%, 130% and 130% for our named executive officers were $625,000, $450,000, $425,000 and $425,000 for Mr. Maetzold, Mr. Stokes, Mr. Juvenal and Ms. Oelschlager, respectively.

Performance Bonus Compensation
In addition to base salaries, our named executive officers For 2022, the target level of payout for the personal portion of the bonus was 100% and the maximum was at 140%. These payout percentages are eligible to receive annual performance-based cash bonuses, which are designed to provide appropriate incentives to achieve defined annual performance goals and to reward our executives for individual achievement towards these goals. The annual performance-based bonus each named executive officer is eligible to receive is generally based on an internal performance rating assessment applied each individual and corresponded with the extent to whichapproach we achieveused internally for other employees in assessing the corporate goals that our boardindividual performance goals. Target level of directors establishes each year andperformance is indicative of meeting the individual’s contributions to such achievements. Atminimum expectations for the end of the year, ourrole. The Compensation Committee reviews each executive’sdetermined that above target level of performance and determines the actual bonus payout to be awarded to each of our named executive officers.
For 2021, the target bonus for Mr. Maetzold was 85% of base salary and 50%warranted for each of these executives officers. Specifically, with regard to Mr. Stokes, the Compensation Committee considered his leadership and oversight of the integration of the Cernostics and AltheaDx acquisitions into our finance and reimbursement functions, among other factors. With regard to Mr. Juvenal and Ms. Oelschlager. Our corporate performance objectives for 2021, as established by ourthe Compensation Committee includedconsidered his leadership and oversight in the integration of the Cernostics and AltheaDx acquisitions into our sales and marketing functions, among other factors. With regard to Ms. Oelschlager, the Compensation Committee considered her leadership and oversight in the integration of the Cernostics and AltheaDx acquisitions into our laboratory operations and information technology support functions, among other factors. Based on their respective performance ratings, the Compensation Committee decided to award amounts for the personal portion of the bonus above the target level. Payments related to achievement of revenue, reimbursementindividual performance goals above the target level are considered discretionary amounts. Such amounts are reported in the “Bonus” column of the Summary Compensation Table instead of the “Non-equity incentive plan compensation” column. Such incremental amounts awarded to Messrs. Stokes and pipeline program goals. In January 2022, our board of directors approved a 136% overall achievement
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level of our corporate goals and awarded bonuses to our named executive officers based on Castle’s achievements. For Mr. Maetzold, the 2021 bonus was weighted 100% to the corporate performance objectives. For each of Mr. Stokes, Mr. Juvenal and Ms. Oelschlager the 2021 bonus was weighted 80% to corporate performance objectivesfor 2022 were $4,700, $13,650 and 20% to individual performance. $13,650, respectively.

The individual performance componentcalculation of our NEOs’ earned annual incentives for each of Mr. Stokes, Mr. Juvenal and Ms. Oelschlager was approved at 110%, 120% and 120%, respectively, including a 10% discretionary component for Mr. Stokes and a 20% discretionary component for each of Mr. Juvenal and Ms. Oelschlager,2022 were as approved by the Compensation Committee.

follows:

Name

  Base
Salary
   

Target
Bonus

(%)

  

Target
Bonus

($)(1)

   Corporate
Performance
Actual
  Corporate
Performance
Weighting
  Individual
Performance
Actual
  Individual
Performance
Weighting
  Actual
Bonus(2)
 

Derek J. Maetzold

  $660,000    85 $561,000    137.5  100     $771,375 

Frank Stokes

  $470,000    50 $235,000    137.5  80  110  20 $310,200 

Tobin W. Juvenal

  $455,000    50 $227,500    137.5  80  130  20 $309,400 

Kristen M. Oelschlager

  $455,000    50 $227,500    137.5  80  130  20 $309,400 

(1)

Target Bonus is calculated as Base Salary multiplied by Target Bonus (%).

(2)

Actual bonus is calculated as follows: (Target Bonus ($) x Corporate Performance Actual x Corporate Performance Weighting) + (Target Bonus ($) x Individual Performance Actual x Individual Performance Weighting). The actual bonus earned, as a percentage of each NEO’s 2022 target bonus opportunity was 137.5%, 132.0%, 136.0% and 136.0% for Messrs. Maetzold, Stokes and Juvenal and Ms. Oelschlager, respectively. As a percentage of base salary, the actual bonus amounts earned were 116.9%, 66.0%, 68.0% and 68.0% for Messrs. Maetzold, Stokes and Juvenal and Ms. Oelschlager, respectively.

Equity-Based Incentive Awards

Overview

Since our initial public offering (“IPO”) in July 2019, we have granted and willintend to grant equity-based incentive awards pursuant to the 2019 Equity Incentive Plan, (the “2019 Plan”), which our board of directors adopted and our stockholders approved in July 2019. Prior to the IPO, we granted equity-based awards pursuant to the 2018 Equity Incentive Plan (the “2018 Plan”) and the 2008 Stock Plan (the “2008 Plan”). The 2018 Plan was adopted by our board of directors in August 2018 and our stockholders approved the 2018 Plan in October 2018. Our board of directors adopted and our stockholders approved the 2008 Plan in September 2008.

We believe that our ability to grant equity-based awards is a valuable and necessary compensation tool that aligns the long-term financial interest of our employees, consultants and directors with the financial interests of our stockholders. In addition, we believe that our ability to grant equity-based awards helps us to attract, retain and motivate employees, consultants and directors, and encourages them to devote their best efforts to our business and financial success. Our Compensation Committee is responsible for approving equity grants.grants or making recommendations regarding equity grants to the Board. Vesting of equity awards is generally tied to continuous service with us and serves as an additional retention measure. Our executives generally are awarded an initial new hire grant upon commencement of employment. Additionalemployment and annually thereafter.

In determining the value of equity award grants for 2022, the Compensation Committee considered peer group data, the individual performance of the NEOs, retention risks, the value of awards granted to the NEOs in prior years and the effects of introducing PSUs this year to the equity award mix.

Performance-Based Equity Incentive Awards

Based on a combination of stockholder feedback, our peer group and the maturity of the Company, the Compensation Committee approved the grant of PSUs to our NEOs in December 2022 that vest based on achievement of a multi-year cumulative revenue target covering the years ending December 31, 2023 and 2024 (the “Revenue Goal”). If the Revenue Goal is

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achieved, then 50% of the PSUs shall vest on the earlier of (i) the Board’s certification that the Revenue Goal was achieved or (ii) the date of the filing of the Company’s Annual Report on Form 10-K for the year ended December 31, 2024 with the SEC (the “Initial Vesting Date”). The remaining 50% of the PSUs shall vest on the one-year anniversary of the Initial Vesting Date. Vesting is subject to the officer’s Continuous Service (as defined in the 2019 Plan) through each such vesting date. If the Revenue Goal is not achieved, no PSUs shall vest. The Compensation Committee selected a revenue metric for this goal because it believes that as an early-stage commercial company, revenue is a critically important financial measure in understanding our current business performance and assessing our future potential. The Compensation Committee considered both a two-year cumulative performance period and three-year cumulative performance period, but ultimately decided upon a two-year period for its first grant of PSUs. In deciding upon a two-year period, the Compensation Committee considered practices of other peer group companies, Castle’s historical revenue growth, management’s projections of future growth, risks and uncertainties that could affect future revenues and that this award represented the Compensation Committee’s first grant of PSUs to date. The Compensation Committee also considered that revenue is also a component of the annual cash incentive bonus plan and determined that given the importance of revenue and that it represents a culmination of our efforts across multiple initiatives, including the effectiveness of our sales and marketing efforts and achieving reimbursement milestones, it was appropriate to also use revenue for the PSU performance metric.

Equity Award Mix

In December 2022, based on consideration of stockholder feedback and the recommendations of the Compensation Committee and Aon, our Board approved the following mix of long-term equity incentive: 50% time-based RSUs and 50% PSUs for our CEO, and 75% time-based RSUs and 25% PSUs for the other NEOs. The time-based RSUs vest in annual installments over a four-year period subject to the holder’s continuous service with us. The PSUs vest contingent upon the achievement of the Revenue Target and the required service period, as described above.

For additional information, please see below under “—Grants of Plan-Based Awards” and “—Outstanding Equity Awards at Fiscal Year End.”

Stock Options

We did not grant any option awards to our NEOs in 2022, but we have granted options to them in the past and may occur periodicallygrant options to them in order to specifically incentivize executives with respect to achieving certain corporate goals or to reward executives for exceptional performance.

the future. All options are granted with a per share exercise price equal to no less than the fair market value of a share of our common stock on the date of the grant of such award. Generally, our stock option awards and restricted stock unit (“RSU”) awards vest over a four-year period subject to the holder’s continuous service with us.
In December 2021, under the 2019 Plan, our Compensation Committee granted Mr. Maetzold, Mr. Stokes, Mr. Juvenal and Ms. Oelschlager options to purchase 106,376 shares, 42,550 shares, 42,550 shares and 42,550, respectively, of common stock, each with an exercise price per share of $40.52. Each of the options included in these grants vests as follows: 25% of the shares subject to the option vests on the first anniversary of the vesting commencement date, and the balance of the shares vest in 36 equal monthly installments thereafter, subject to the executive’s continuous service with us. Additionally, in December 2021, under our 2019 Plan, our Compensation Committee granted Mr. Maetzold, Mr. Stokes, Mr. Juvenal and Ms. Oelschlager 61,698, 24,679, 24,679 and 24,679 RSUs, respectively. Each RSU represents the right be issued on a future date one share of common stock for each RSU that vests on the applicable vesting date(s). The RSUs vest in four equal annual installments, with the first installment vesting on the first anniversary of the vesting commencement date.
For additional information, please see below under “—Outstanding Equity Awards at Fiscal Year End.”
Agreements with Our Named Executive Officers

AGREEMENTS WITH OUR NEOS

Below are descriptions of our employment agreements with our named executive officers.NEOs. Each of our executive officers’ employment is at will and may be terminated by us at any time. Any potential payments and benefits due upon a qualifying termination of employment or a change in control are further described below under “—Potential Payments and Benefits upon Termination or Change in Control.Change-in-Control.

Mr. Maetzold. We entered into an amended and restated employment agreement with Mr. Maetzold in September 2012, which was amended in February 2017 and in June 2019 and which governs the current terms of his employment with us. Under the terms of the employment agreement, as amended, Mr. Maetzold is entitled to an annual base salary of $445,000 (most recently increased to $660,000$686,400 for 2022)2023). In addition, Mr. Maetzold is eligible to receive an annual performance cash bonus with a target of 60% (most recently increased(increased to 85%95% beginning in 2021)2023) of his base salary based on corporate performance and his individual performance, as determined by our board of directors.performance. Pursuant to his employment agreement, as amended, Mr. Maetzold is entitled to receive periodic grants of stock options, as determined by our board of directors.

Mr. Stokes. We entered into an employmentoffer letter agreement with Mr. Stokes in November 2017, which governs the current terms of his employment with us. Under the terms of the employmentoffer letter agreement, Mr. Stokes was entitled to an initial base salary of $275,000 (most recently increased to $470,000$488,800 for 2022)2023). In addition, he is eligible to receive an annual performance cash bonus with a target payout of 35% (increased to 50% beginning in 2020) of his base salary based on corporate performance as determined by our board of directors, and Mr. Stokes’s individual performance as determined by our Chief Executive Officer and as approved by our board of directors.performance. Pursuant to his employment agreement, in May 2018, we granted to Mr. Stokes an option to purchase 133,137 shares of common stock, as further described below under “—Outstanding Equity Awards at Fiscal Year-End.Year End.

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Mr. Juvenal. We entered into an employment agreement with Mr. Juvenal in October 2008, which was amended on April 21, 2009, and which governs the current terms of his employment with us. Under the terms of the employment agreement, Mr. Juvenal was entitled to an initial base salary of $225,000 (most recently increased to $455,000$482,300 for 2022)2023). In addition, he is eligible to receive an annual performance cash bonus with a target payout of 50% of his base salary based on corporate performance as determined by our board of directors, and Mr. Juvenal’s individual performance as determined by our Chief Executive Officerperformance.

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Compensation Discussion and as approved by our board of directors.

Analysis

Ms. Oelschlager. We entered into an employment agreement with Ms. Oelschlager in September 2008, which was amended on April 11, 2016, and which governs the current terms of her employment with us. Under the terms of the employment agreement, Ms. Oelschlager was entitled to a sign-on bonus of $6,500 and an initial base salary of $125,000 (most recently increased to $455,000$482,300 for 2022)2023). In addition, she is eligible to receive an annual performance cash bonus with a target payout of 50% of her base salary based on corporate performance as determined by our board of directors, and Ms. Oelschlager’s individual performance as determined by our Chief Executive Officer and as approved by our board of directors.

Potential Payments andperformance.

POTENTIAL BENEFITS UPON TERMINATION OR CHANGE-IN-CONTROL

This “Potential Benefits upon Termination or ChangeChange-in-Control” section should be read in Control

conjunction with the “—Potential Payments upon Termination or Change-in-Control” section below, which provides a table that quantifies the benefits described in this section.

Employment Agreements

Regardless of the manner in which a named executive officer’sNEO’s service terminates, each named executive officerNEO is entitled to receive amounts earned during his or her term of service, including unpaid salary, and unused vacation,reimbursement of expenses for which the NEO is entitled to, as applicable. In addition, each of our named executive officersNEOs is eligible to receive certain benefits in connection with certain terminations pursuant to his or her employment agreement with us as described below.including continuing coverage under the Consolidated Omnibus Budget Reconciliation Act of 1985 (“COBRA”). For the definitions of “cause,” “good reason,” “disability,” and “change of control” referenced below, please refer to the individual employment agreements with each of our named executive officers,NEOs, copies of which are filed as exhibits to the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2021.

2022.

Mr. Maetzold. Upon Mr. Maetzold’s resignation without good reason, Mr. Maetzoldhe will be entitled to receive 12 months of continued base salary, to be paid in accordance with our normal payroll procedures and less any applicable withholdings. In the event Mr. Maetzold’s service is terminated without cause (excluding death or disability) or he resigns with good reason at any time prior to our undergoing a change of control, Mr. Maetzold will be eligible to receive (i) aggregate severance pay equal to 150% of his base salary, 50% of which is payable in a lump sum after the date of termination, less any applicable withholdings, and the remaining 100% of which is payable in equal regular installments over 12 months in accordance with our normal payroll procedures and less any applicable withholdings, (ii) 18 months’ acceleration on the vesting of any unvested portion of outstanding stock options, (iii) continuation of coverage under the Consolidated Omnibus Budget Reconciliation Act of 1985 (“COBRA”)COBRA at our expense for up to 18 months, and (iv) a cash bonus equal to 150% of the greater of the most recent annual performance bonus target or actual bonus earned, to be paid in equal regular installments over 12 months in accordance with our normal payroll procedures and less any applicable withholdings. In the event Mr. Maetzold’s service is terminated without cause (excluding death or disability) or he resigns with good reason at any time following a change of control, Mr. Maetzold will be eligible to receive (i) aggregate severance pay equal to 300% of his base salary, 200% of which is payable in a lump sum after the date of termination, less any applicable withholdings, and the remaining 100% of which is payable in equal regular installments over 12 months in accordance with our normal payroll procedures and less any applicable withholdings, (ii) immediate vesting of any unvested portion of stock options outstanding as of the date of termination, (iii) continuation coverage under COBRA continuation at our expense for up to three years, and (iv) a cash bonus equal to 300% of the greater of the most recent annual performance bonus target or actual bonus earned, to be paid in a lump sum after the date of termination. In the event of termination due to death or disability, Mr. Maetzold will be eligible to receive immediate vesting of any unvested portion of stock options outstanding as of the date of termination.

In all event of termination, Mr. Maetzold will be paid for any unused earned vacation time.

Mr.Stokes. Upon the executive’sMr. Stokes’s termination without cause or resignation for good reason, Mr. Stokeshe will be eligible to receive (i) continued base salary for six months (net of any amounts earned through consulting arrangements with us following Mr. Stokes’ termination), to be paid in accordance with our normal payroll procedures and less any applicable withholdings, (ii) continuedcontinuation of coverage under COBRA benefitsat our expense during such six month period, and (iii) 24 months’ accelerated vesting of the stock option granted pursuant to Mr. Stokes’ employment agreement in the event of such termination prior to our undergoing a change of control. In addition, in the event Mr. Stokes’ service is terminated without cause or the executive resigns for good reason within six months following a change of control, Mr. Stokes will be eligible to receive (i) immediate vesting of any unvested portion of the stock option granted pursuant to his employment agreement, (ii) 12 months of continued base salary (net of any amounts earned through consulting arrangements with us following the his termination), and to be paid in accordance with our normal payroll procedures and less any applicable withholdings, and (iii) continuedcontinuation of coverage under COBRA benefitsat our expense during such 12 month period.

Mr. Juvenal. Upon the executive’sMr. Juvenal’s termination without cause or resignation for good reason, Mr. Juvenalhe will be eligible to receive (i) immediate vesting of unvested stock options outstanding as of the date of termination in the event of such termination prior to our undergoing a change of control. In addition, in the event the Mr. Juvenal’s service is terminated without cause or the executive resigns for good reason following a change of control, then he will be eligible to receive (i) immediate vesting of unvested stock options outstanding as of the date of termination, (ii) 12 months of continued base salary, to be paid in

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accordance with our normal payroll procedures, (iii) continuedcontinuation of coverage under COBRA benefits during such period,at our expense for up to 18 months, and (iv) management bonus equal to his most recent management bonus.

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Ms. Oelschlager. Upon Ms. Oelschlager. Upon the executive’sOelschlager’s termination without cause or resignation for good reason, Ms. Oelschlagershe will be eligible to receive (i) continued base salary for six months, to be paid in accordance with our normal payroll procedures and less any applicable withholdings, and (ii) immediate vesting of unvested stock options outstanding as of the date of termination in the event of such termination prior to our undergoing a change of control. In addition, in the event the Ms. Oelschlager’s service is terminated without cause or the executive resigns for good reason following a change of control, then she will be eligible to receive (i) immediate vesting of any unvested portion of the stock option granted pursuant to her employment agreement, (ii) 12 months of continued base salary, to be paid in accordance with our normal payroll procedures, (iii) continuedcontinuation of coverage under COBRA benefits during such period,at our expense for up to 18 months, and (iv) management bonus equal to her most recent management bonus.

All severance benefits described above, other than the continued COBRA benefits for Mr. Stokes, are subject to (i) the execution and effectiveness of a release of claims in favor of us and (ii) compliance with the executive’s employment agreement and employee proprietary information agreement.

Each of our named executive officersNEOs holds stock options, time-based RSUs and RSUsPSUs under the Castle Biosciences, Inc. 2008 Stock Plan (the “2008 Plan”), the Castle Biosciences, Inc. 2018 Equity Incentive Plan (the “2018 Plan”) and/or the 2019 Plan that were granted subject to the general terms of the applicable equity plan and the form of stock option or RSU agreement, as applicable. A description of (i) the termination and change in controlchange-in-control provisions in the 2008 Plan, 2018 Plan and 2019 Plan and (ii) stock options and RSUs granted thereunder is provided below under “Equity Compensation Plan Information—Equity Benefit Plans” and the specificare set forth below. Specific vesting terms of each named executive officer’sNEO’s stock options, RSUs and RSUsPSUs are described below under “—Outstanding Equity Awards at Fiscal Year End.”

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Table

Change-in-Control Provisions under the 2008 Plan

The 2008 Plan provides that in the event of Contents

Outstanding Equity Awards at Fiscal Year End
a merger or a change in control, each outstanding stock award shall be treated as the plan administrator determines, including, without limitation, that each stock award may be assumed or a similar award substituted for such stock award by the successor corporation (or its parent). Notwithstanding the foregoing, in the event of a change in control in which the successor corporation (or its parent) does not assume or substitute for such outstanding stock awards, then the vesting and exercisability of such stock awards shall accelerate in full. In addition, the plan administrator shall notify the participant that the stock award shall be fully vested and exercisable for a specified period of time, and any such award shall terminate upon the expiration of such period for no consideration, unless otherwise determined by the plan administrator. The following table presents information regarding outstanding equityplan administrator is not obligated to treat all stock awards held by our named executive officers as of December 31, 2021.
Option awards(1)
Stock awards(1)
NameVesting Commencement DateNumber of Securities Underlying Unexercised Options Exercisable
Number of Securities Underlying Unexercised Options Unexercisable(2)
Option Exercise Price(3)
Option Expiration Date
Number of shares or units of stock that have not vested(4)
Market value of shares or units of stock that have not vested(5)
Derek J. Maetzold5/10/201898,441 (7)— $2.39 05/09/2028— $— 
11/6/201815,808 4,700 $2.39 11/11/2028— $— 
3/13/201945,118 20,509 $3.38 03/12/2029— $— 
3/27/201920,686 — $3.72 (6)03/26/2024— $— 
12/13/201985,000 85,000 $29.50 12/12/2029— $— 
12/10/202021,775 65,325 $59.16 12/09/203016,087 $689,650 
12/10/2021— 106,376 $40.52 12/09/203161,698 $2,644,993 
Frank Stokes12/4/201725,137 (7)— $2.39 05/09/2028— $— 
3/13/201917,739 8,973 $3.38 03/12/2029— $— 
12/13/201927,500 27,500 $29.50 12/12/2029— $— 
12/10/20207,750 23,250 $59.16 12/09/20306,000 $257,220 
12/10/2021— 42,550 $40.52 12/09/203124,679 $1,057,989 
Tobin W. Juvenal7/21/2017479 — $2.36 07/20/2027— $— 
5/10/201810,135 2,560 $2.39 05/09/2028— $— 
3/13/201916,919 7,691 $3.38 03/12/2029— $— 
12/13/201917,500 17,500 $29.50 12/12/2029— $— 
8/4/202010,000 20,000 $41.36 08/03/2030— $— 
12/10/20207,250 21,750 $59.16 12/09/20305,250 $225,068 
12/10/2021— 42,550 $40.52 12/09/203124,679 $1,057,989 
Kristen Oelschlager, R.N.7/21/20171,197 — $2.36 07/20/2027— $— 
5/10/20184,614 2,564 $2.39 05/09/2028— $— 
11/6/20181,538 1,880 $2.39 11/11/2028— $— 
3/13/201916,919 7,691 $3.38 03/12/2029— $— 
12/13/201917,500 17,500 $29.50 12/12/2029— $— 
8/4/202010,000 20,000 $41.36 08/03/2030— $— 
12/10/20207,250 21,750 $59.16 12/09/20305,250 $225,068 
12/10/2021— 42,550 $40.52 12/09/203124,679 $1,057,989 

(1)All ofsimilarly in the option awards were granted under eithertransaction.

Under the 2008 Plan, a change in control generally means the occurrence of any of the following: (1) the acquisition by any person or group of more than 50% of the total voting power of our stock; (2) a majority of members of the board of directors is replaced during any 12 month period by directors whose appointment or election is not endorsed by a majority of the members of the board of directors prior to the date of the appointment or election; or (3) any person acquires (or has acquired during the 12 month period ending on the date of the most recent acquisition by such person or persons) assets from us that have a total gross fair market value equal to or more than 50% of the total gross fair market value of all of our assets immediately prior to such acquisition or acquisitions.

Change-in-Control Provisions under the 2018 Plan

Corporate Transactions

The 2018 Plan provides that in the event of a corporate transaction or a change in control, each outstanding stock award shall be treated as the plan administrator determines, including, without limitation, that each stock award may be assumed, continued or a similar award substituted for such stock award by the surviving or acquiring corporation (or its parent). Notwithstanding the foregoing, in the event of a change in control in which the surviving or acquiring corporation (or its parent) does not assume, continue or substitute for such outstanding stock awards, then the vesting and exercisability of such stock awards shall accelerate in full. In addition, the plan administrator shall notify the participant that the stock award shall be fully vested and exercisable for a specified period of time, and any such award shall terminate upon the expiration of such period for no consideration, unless otherwise determined by the plan administrator.

The plan administrator is not obligated to treat all stock awards similarly in the transaction.

In addition, a stock award under the 2018 Plan may be subject to additional acceleration of vesting and exercisability upon or after a change in control as may be provided in the award agreement or other written agreement between us and the participant, but in the absence of such provision, no such acceleration will automatically occur, except as described above.

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Compensation Discussion and Analysis

Under the 2018 Plan, a corporate transaction is generally the consummation of (1) a sale or other disposition of all or substantially all of our assets, (2) the sale or other disposition of more than 50% of our outstanding securities, (3) a merger, consolidation or similar transaction where we do not survive the transaction or (4) a merger, consolidation or similar transaction where we do survive the transaction but the shares of our common stock outstanding immediately before such transaction are converted or exchanged into other property by virtue of the transaction.

Under the 2018 Plan, a change in control is generally (1) the acquisition by any person or company of more than 50% of the combined voting power of our then-outstanding stock, (2) a consummated merger, consolidation or similar transaction in which our stockholders immediately before the transaction do not own, directly or indirectly, more than 50% of the combined voting power of the surviving entity (or the parent of the surviving entity) in substantially the same proportions as their ownership immediately prior to such transaction, (3) a complete dissolution or liquidation of us, (4) a consummated sale, lease, exclusive license or other disposition of all or substantially all of our assets other than to an entity more than 50% of the combined voting power of which is owned by our stockholders in substantially the same proportions as their ownership of our outstanding voting securities immediately prior to such transaction or (5) when a majority of our board of directors becomes comprised of individuals who were not serving on our board of directors on the date the 2018 Plan was adopted, or the incumbent board, or whose nomination, appointment or election was not approved by a majority of the incumbent board still in office.

Change-in-Control Provisions under the 2019 Plan

The 2019 Plan provides that in the event of certain specified significant corporate transactions (or a change in control, as defined below), unless otherwise provided in an award agreement or other written agreement between us and the award holder, the plan administrator may take one or more of the following actions with respect to such stock awards:

arrange for the assumption, continuation, or substitution of a stock award by a successor corporation;

arrange for the assignment of any reacquisition or repurchase rights held by us to a successor corporation;

accelerate the vesting, in whole or in part, of the stock award and provide for its termination if not exercised (if applicable) at or before the effective time of the transaction;

arrange for the lapse, in whole or in part, of any reacquisition or repurchase rights held by us;

cancel or arrange for the cancellation of the stock award, to the extent not vested or not exercised before the effective time of the transaction, in exchange for a cash payment, if any; or

make a payment equal to the excess, if any, of (A) the value of the property the participant would have received on exercise of the award immediately before the effective time of the transaction, over (B) any exercise price payable by the participant in connection with the exercise.

The plan administrator is not obligated to treat all stock awards or portions of stock awards in the same manner and is not obligated to take the same actions with respect to all participants.

Under the 2019 Plan, a corporate transaction is generally the consummation of: (1) a sale or other disposition of all or substantially all of our assets, (2) the sale or other disposition of more than 50% of our outstanding securities, (3) a merger or consolidation where we do not survive the transaction or (4) a merger or consolidation where we do survive the transaction but the shares of our common stock awards wereoutstanding immediately before such transaction are converted or exchanged into other property by virtue of the transaction.

Change in Control

In the event of a change in control, the plan administrator may take any of the above-mentioned actions. Awards granted under the 2019 Plan the terms of which are described below under “—Equity Benefit Plans.”

(2)Except for the options to purchase 20,686 shares of common stock granted to Mr. Maetzold with a vesting commencement date of March 13, 2019, which were fully vested upon issuance, each option award vests as follows: 25% of the sharesmay be subject to additional acceleration of vesting and exercisability upon or after a change in control as may be provided in the option vest on the first anniversary of the vesting commencement date,applicable stock award agreement or in any other written agreement between us or any affiliate and the balanceparticipant, but in the absence of the shares vest in equal monthly installments thereafter over the next 36 months, provided in each case that the holder is then providing services to us in accordance with the terms of the 2008 Plan, the 2018 Plan orsuch provision, no such acceleration will automatically occur. Under the 2019 Plan, a change in control is generally (1) the acquisition by any person or company of more than 50% of the combined voting power of our then-outstanding stock, (2) a merger, consolidation or similar transaction in which our stockholders immediately before the transaction do not own, directly or indirectly, more than 50% of the combined voting power of the surviving entity (or the parent of the surviving entity) in substantially the same proportions as applicable. Certain option awards are subjecttheir ownership immediately prior to acceleration, as described above under “—Potential Payments and Benefits upon Terminationsuch transaction, (3) a sale, lease, exclusive license or other disposition of Change in Control.”
(3)Unless otherwise indicated,all or substantially all of our assets other than to an entity more than 50% of the option awards were granted with a per share exercise price equal tocombined voting power of which is owned by our stockholders in substantially the fair market value of one sharesame proportions as their ownership of our common stock on the dateoutstanding voting securities immediately prior to such transaction, (4) a complete dissolution or liquidation of grant. Prior to the IPO, the fair market valueus or (5) when a majority of our common stock was determined in good faith by our board of directors. Following the IPO, the fair market value of our common stock is the closing selling price per share of our common stock as reported on the Nasdaq Global Market on the date of grant or other relevant determination date.
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(4)This column consists of RSUs, which vest in four equal annual installments, with the first installment vesting on the first anniversary of the vesting commencement date.
(5)Calculated using a price of $42.87 per share, which was the closing price of our common stock as reported on the Nasdaq Global Market as of December 31, 2021.
(6)The fair market value of one share of our common stock on the date of grant, as determined in good faith by our board of directors was $3.38. On thebecomes comprised of individuals who were not serving on our board of directors on July 24, 2019 (the date of grant, Mr. Maetzold owned more than 10%the underwriting agreement related to the IPO), or the incumbent board, or whose nomination, appointment, or election was not approved by a majority of the voting powerincumbent board still in office.

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2023 Proxy Statement

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Compensation Discussion and Analysis

PENSION BENEFITS AND NONQUALIFIED DEFERRED COMPENSATION

There were no defined benefit pension or nonqualified deferred compensation plans in place for 2022. Our board of all classes of our stock. Pursuant to the 2018 Plan, the exercise price per share for the incentive stock option award granted to Mr. Maetzold on March 27, 2019, is $3.72, which represents 110% of the fair market value of one share of our common stock on the date of grant.

(7)The option is exercisable immediately, in whole or in part, conditioned upon the named executive officer’s entering into a restricted stock purchase agreement with respect to any unvested shares. The shares subject to the option vest and/or are released from the Company’s repurchase option, as to 1/4th of the shares subject to the option on the first anniversary of the vesting commencement date, and thereafter as to 1/48th of the shares subject to such option on each monthly anniversary of the vesting commencement date, such that all shares will be vested on the fourth anniversary of the vesting commencement date, subject to the holder continuingdirectors may elect to provide services toour officers and other employees with such benefits in the Company through such vesting date.
We did not engagefuture if it determines that doing so is in any repricing or other modifications or cancellations to any of our named executive officers’ outstanding equity awards during the fiscal year ended December 31, 2021.
best interests.

OTHER COMPENSATION PRACTICES AND POLICIES

Perquisites, Health, Welfare and Retirement Benefits

Our named executive officers,NEOs, during their employment with us, are eligible to participate in our employee benefit plans, including our medical, dental, vision, group term life, disability, employee assistance, and accidental death and dismemberment insurance plans, in each case on the same basis as all of our other employees. In addition, we provide a 401(k) plan to our employees, including our named executive officers,NEOs, as discussed in the section below entitledtitled “—401(k) Plan.”

We generally do not provide perquisites or personal benefits to our named executive officers,NEOs, except in limited circumstances. We do reimburse Mr. Stokes for certain expenses relating to his travel from his home in Charlotte, North Carolina to our offices in Friendswood, Texas.

We pay a portion of the premiums for medical, dental, vision, group term life, disability, employee assistance and accidental death and dismemberment insurance for all of our employees who work at least 30 hours per week, including our named executive officers. Our board of directors may elect to adopt qualified or nonqualified benefit plans in the future if it determines that doing so is in our best interests and in the best interests of our stockholders.

NEOs.

401(k) Plan

We maintain a defined contribution employee retirement plan (“401(k)(the “401(k) plan”), for our employees. Our executive officers are eligible to participate in the 401(k) plan on the same basis as our other employees. The 401(k) plan is intended to qualify as a tax-qualified plan under Section 401(k) under the Internal Revenue Code of 1986, as amended (the “Code”). The 401(k) plan provides that each participant may contribute up to the lesser of 100% of his or her compensation or the statutory limit, which was $19,500$20,500 for calendar year 2021.2022. Participants that are 50 years or older can also make “catch-up”“catch-up” contributions, which in calendar year 20212022 was up to an additional $6,500 above the statutory limit. For the year ended December 31, 2021,2022, we made matching contributions into the 401(k) plan on behalf of participants in an amount equal to 100% of up to 6% of eligible compensation contributed to the 401(k) plan, subject to statutory limits. For calendar year 2021,2022, the maximum matching contribution for a participant in the 401(k) plan was $17,400.$18,300. Matching contributions vest immediately. Participant contributions are held and invested, pursuant to the participant’s instructions, by the 401(k) plan’s trustee.

Nonqualified Deferred Compensation
We do not maintain nonqualified defined contribution plans

Retirement Policy

During 2022, our Board evaluated the retentive and succession planning value of a retirement policy. In January 2023, our Board adopted a retirement policy for our employees who (i) generally are at or other nonqualified deferred compensation plans. Our boardabove the Vice President level on the date of directors may electtheir retirement, (ii) are at least 60 years of age and (iii) have completed at least five years of service with us.

For equity awards that are subject to provide our officerstime-vesting, acceleration of the vesting and other employees with nonqualified defined contribution or other nonqualified deferred compensation benefits inexercisability of any then-outstanding equity awards to the future if it determines that doing so is in our best interests.


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DIRECTOR COMPENSATION
The following table sets forth in summary form information concerning the compensation that was earned by each of our non-employee directorsextent such awards were scheduled to vest during the fiscal year ended December 31, 2021:
Name
Fees Earned or Paid in Cash ($)(6)
Stock Awards
($)(1)
Option Awards
($)(1)(2)
Total
($)
Mara G. Aspinall70,000 59,113 140,023 269,136 
Daniel M. Bradbury80,000 59,113 140,023 279,136 
Kimberlee S. Caple(3)
34,449 88,176 214,385 337,010 
G. Bradley Cole77,500 59,113 140,023 276,636 
Joseph C. Cook III(4)
19,516 — — 19,516 
Ellen Goldberg(3)
33,474 88,176 214,385 336,035 
Miles D. Harrison65,423 59,113 140,023 264,559 
David Kabakoff, Ph.D.(4)
35,806 — — 35,806 
Tiffany P. Olson(3)(5)
45,316 79,979 195,349 320,644 

(1)In accordancevesting period following the retirement date based solely on the eligible employee’s continued employment with SEC rules, this column reflects the aggregate grantus, had such employee remained employed by us through such date, fair valuesuch that such portion of the stock optionthen-outstanding equity award will be deemed immediately vested and RSU awards granted in 2021 computed in accordance with ASC 718. Assumptions used in the calculation of these amounts are described in Note 14 to our consolidated financial statements appearing in our Annual Report on Form 10-K for the fiscal year ended December 31, 2021. The amounts reported in this column reflect the accounting value of these awards and do not correspond to the actual economic value that ultimately may be realized by our non-employee directors. See footnotes 3 and 4 below for additional information with respect to the option and RSU awards made to Ms. Caple, Ms. Goldberg, Ms. Olson, Mr. Cook and Mr. Kabakoff in 2021.
(2)As of December 31, 2021, the aggregate number of shares outstanding under all options to purchase our common stock held by our non-employee directors were: Ms. Aspinall, 43,392, Mr. Bradbury, 42,274, Ms. Caple, 5,365, Mr. Cole, 67,022, Ms. Goldberg, 5,365, Mr. Harrison, 27,379, and Ms. Olson, 5,936.
(3)Eachexercisable as of the option and RSUdate immediately preceding the retirement date.

For equity awards for Ms. Caple, Ms. Goldberg and Ms. Olson were granted in connection with their appointmentthat are subject to performance-vesting, if the boardrelevant performance conditions of directors on July 14, 2021 (for Ms. Caple and Ms. Goldberg) and May 8, 2021 (for Ms. Olson).

(4)Mr. Cook and Mr. Kabakoff resigned from the board of directors effective May 8, 2021, and August 5, 2021, respectively. Although Mr. Kabakoff received an annual optionany then-outstanding equity award during the year ended December 31, 2021, he forfeited this entire award upon his resignation. Mr. Kabakoff also forfeited the unvested portions of his outstanding option awards upon his resignation. In connection with Mr. Cook’s resignation, we entered into an agreement with him (the “Cook Consulting Agreement”) to provide certain consulting services to us. The Cook Consulting Agreement terminated on December 31, 2021, in accordance with its terms. The sole consideration to Mr. Cook under the Cook Consulting Agreement was the continued vesting of his unvested stock options in accordance with their existing vesting provisions. Upon termination of the Cook Consulting Agreement, Mr. Cook forfeited the unvested portions of his outstanding option awards.
(5)Pursuant to Castle’s Non-Employee Director Compensation Policy, as amended May 7, 2021, a director must have been appointed to the board of directorsare achieved prior to the first board meetingretirement date but the award remains subject to time-vesting and is scheduled to vest during the vesting period following the retirement date based solely on the eligible employee’s continued employment with us, had such employee remained employed by the Company through such date, the earned portion of the Company’s first fiscal quarteraward will be deemed immediately vested and exercisable as of the date immediately preceding the retirement date. If the relevant performance conditions of any then-outstanding equity awards are not achieved prior to the retirement date, the award shall be treated according to their individual award agreements.

The vesting periods are as follows:

CEO: 24 months, plus an additional six months for each year of service after the age of 66.

Senior Vice President and above: 18 months, plus an additional three months for each year of service after the age of 66.

Vice President and below: nine months, plus an additional three months for each year of service after the age of 66.

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Compensation Discussion and Analysis

Eligible employees will have been eligible for 2021 annual grants,12 months following the retirement date to exercise the outstanding and therefore Ms. Olson did not receive an annual grant in 2021.

(6)Includes $10,000 of compensation for each of Ms. Aspinall, Ms. Caple, Mr. Cole, Ms. Goldberg, Mr. Harrison and Ms. Olson for service on the AltheaDx Transaction Committee (as defined in the section titled “Transactions with Related Persons and Indemnifications”).
vested time-vesting equity awards.

Currently Mr. Maetzold our President and Chief Executive Officer, is also a member of our board of directors but did not receive any additional compensationMr. Juvenal meet the requirements for his serviceaccelerated vesting upon retirement under the Retirement Policy.

This policy was adopted to facilitate and support ongoing organizational changes as a director. Seewe build and scale the section titled “Executive Compensation—Narrative Disclosurebusiness for growth and to Summary Compensation Table” above for more information regarding the compensation earned by Mr. Maetzold.

We have reimbursedassist with succession planning activities.

Prohibition on Hedging, Short Sales and will continue to reimburse all of our non-employee directors for their travel, lodging and other reasonable expenses incurred in attending meetings of our board of directors and committees of our board of directors.

Non-Employee Director Compensation Policy
Pledging

Our board of directors has adopted a non-employee director compensationan insider trading policy that is applicableapplies to each memberall of our boardemployees, officers and directors are prohibited from engaging in inherently speculative transactions with respect to our securities, including (i) short sales, transactions in put options, call options or other derivative securities on an exchange or in any other organized market, or in any other inherently speculative transactions, (ii) hedging or monetization transactions, including through the use of directors whofinancial instruments such as prepaid variable forwards, equity swaps, collars and exchange funds, and (iii) holding our securities in a margin account or otherwise pledging our securities as collateral for a loan.

Clawback Policy

In the first quarter of 2023, the Board adopted our Clawback Policy, providing for the recovery of previously paid incentive compensation based on financial reporting measures paid to executive officers if we prepare an accounting restatement for any fiscal quarter or year due to our material noncompliance with any financial reporting requirement under the federal securities laws. The Compensation Committee is not also serving as an employeeresponsible for making all determinations with respect to the application or consultant.

Upon recommendationoperation of the Compensation Committee, our boardClawback Policy. The Clawback Policy includes any incentive compensation granted, vested or paid to the CEO or other executive officers during the three completed fiscal years immediately preceding the date on which the Company is required to prepare the accounting restatement that exceeds the amount of directors approved an amendmentincentive compensation that would have been received had such amount been determined based on the accounting restatement, without regard to our non-employee director compensation policy that provided fortaxes paid. Our Clawback Policy is designed to comply with Rule 10D-1 promulgated under the following compensation for service on our board of directors, effective April 1, 2020:
an annual cash retainer to $40,000;
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an additional annual cash retainer of $40,000 for service as chairpersonExchange Act, which implements Section 954 of the board of directors;
an additional annual cash retainer of $10,000, $7,500Dodd-Frank Act, and, $5,000 for serviceamong other things, requires national securities exchanges such as Nasdaq to establish listing standards mandating that each issuer adopt a member ofClawback Policy, comply with the Audit Committee, Compensation Committeepolicy and provide the Nominating and Corporate Governance Committee, respectively (committee chairsrequired disclosures about the policy. Once Nasdaq’s listing standards are effective, we will not receive this retainer in additionreview our Clawback Policy to the committee chair service retainer);
an additional annual cash retainer of $20,000, $15,000 and $10,000 for service as chairperson of the Audit Committee, Compensation Committee and the Nominating and Corporate Governance Committee, respectively;
an initial option grant to purchase 16,000 shares of our common stock on the date of each such non-employee director’s appointment to our board of directors, one-third of the shares vesting on the one-year anniversary of the Vesting Commencement Date (as defined below) and the remaining shares vesting in equal monthly installments over the next two years. The “Vesting Commencement Date” means the 15th day of the month in which the initial option grant was granted, provided that if the initial option grant was granted after the 15th day of a month, the Vesting Commencement Date shall be the 1st day of the month immediately following the month in which the initial option grant was granted; and
an annual option grant to purchase 8,000 shares of our common stock on the date of each of our annual stockholder meetings, vesting one year following the grant date.
Uponensure compliance with applicable listing standards.

Stock Ownership Guidelines

On the recommendation of the Compensation Committee, our board of directors approvedhas adopted Stock Ownership Guidelines for our executive officers and directors (each a second amendment“Covered Individual” and collectively the “Covered Individuals”), determined based on the below:

Title

Guideline Multiple

CEO

3x base salary

All other Officers

1x base salary

Directors

3x annual cash retainer

Shares included in the calculation of a Covered Individual’s stock ownership are (i) shares owned outright by the Covered Individual and by members of his or her immediate family, (ii) shares held in trust for the benefit of the Covered Individual or for the benefit of a member of his or her immediate family, (iii) vested shares under any deferred compensation plans and (iv) vested and unvested time-vested RSUs, net of the estimated shares needed to pay the minimum tax withholding for those vested RSUs. Unexercised options, whether vested or unvested, and unearned PSUs are not considered in the calculation of a Covered Individual’s ownership for purposes of determining whether a Covered Individual has met the applicable guideline. For directors, the annual cash retainer used in the calculation is the annual Board service retainer, excluding additional retainers for service on Board committees or for service as Chair.

The guidelines must be achieved by each Covered Individual as of the end of the calendar year in which occurs the date that is five (5) years after the later of (1) the Effective Date of January 31, 2023 and (2) the date the individual became a Covered Individual (such period of time, the “Compliance Period”). After the Compliance Period, the guidelines will be revised whenever a Covered Individual’s Base Pay (as defined therein) changes by 20% or more from the last Base Pay used to calculate the then-current guideline for such Covered Individual (each, an “Adjustment Date”), and such revised guideline must be achieved by the affected Covered Individual on or before the end of the calendar year in which occurs the date that is three (3) years after the Adjustment Date. As of March 31, 2023, Mara G. Aspinall, Daniel M. Bradbury, Tobin W. Juvenal, Derek J. Maetzold, Kristen M. Oelschlager, Tiffany P. Olson and Frank Stokes meet these guidelines. The others have five years from the Effective Date to attain compliance.

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2023 Proxy Statement

LOGO


Compensation Discussion and Analysis

COMPENSATION COMMITTEE REPORT

The Compensation Committee has reviewed and discussed the foregoing Compensation Discussion and Analysis required by Item 402(b) of Regulation S-K with management and, based on such review and discussions, the Compensation Committee has recommended to our non-employee director compensation policy. Effective January 28, 2021, our non-employee director compensation policy was amended suchboard of directors that the initial grantCompensation Discussion and Analysis be included in this proxy statement and incorporated into our Annual Report on Form 10-K for new directors consists of both options to purchase shares of common stock and RSUs having an aggregate value of $350,000. Following the amendment,fiscal year ended December 31, 2022.

Submitted by the total number of shares subject to the initial grant is now calculated as the number of stock option equivalent shares equal to the aggregate valuemembers of the initial grants, based on a Black-Scholes valuation methodology using an assumedCompensation Committee:

Compensation Committee

Miles D. Harrison (Chair)

G. Bradley Cole

Ellen Goldberg

Tiffany P. Olson

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Executive Compensation Tables

SUMMARY COMPENSATION TABLE

Name and principal position

  Year   

Salary

($)

   

Bonus

($)(1)

   

Stock

awards

($)(2)

   

Option
awards

($)(2)

   

Non-equity
incentive plan
compensation

($)(3)

   

All other
compensation

($)(4)

   

Total

($)

 

Derek J. Maetzold

   2022    660,000        6,102,902        771,375    18,300    7,552,577 

President and CEO

   2021    625,000        2,500,003    2,656,954    722,500    17,400    6,521,857 
   2020    550,000        1,268,982    3,056,657    457,600    11,400    5,344,639 

Frank Stokes

   2022    470,000    4,700    1,757,713        305,500    69,160    2,607,073 

Chief Financial Officer

   2021    450,000    4,500    999,993    1,062,350    289,800    58,708    2,865,351 
   2020    400,000    4,000    473,280    1,087,530    208,000    44,257    2,217,067 

Tobin W. Juvenal(5)

   2022    455,000    13,650    1,919,356        295,750    18,300    2,702,056 

Chief Commercial Officer

   2021    425,000    8,500    999,993    1,062,350    273,700    17,400    2,786,943 

Kristen M. Oelschlager(5)

   2022    455,000    13,650    1,919,356        295,750    18,300    2,702,056 

Chief Operating Officer

   2021    425,000    8,500    999,993    1,062,350    273,700    17,400    2,786,943 

(1)

Represents the discretionary portion, if any, of the performance-based cash bonuses earned during the year and paid subsequent to year end, as further described above under “—Annual Performance-Based Cash Bonuses.”

(2)

These columns set forth the aggregate grant date fair value of option awards and stock awards, without regard to forfeitures, granted during the year measured pursuant to FASB ASC 718. The valuation assumptions we used in calculating the fair value of options are set forth in Note 14 to our consolidated financial statements appearing in our Annual Report on Form 10-K for the fiscal year ended December 31, 2022. Note that the amounts reported in this column reflect the accounting value of these awards and do not correspond to the actual economic value that ultimately may be realized by our NEOs. The PSUs granted are subject to performance conditions, as defined under FASB ASC 718, and, therefore, the value at the grant date is based upon the probable outcome of such conditions, which corresponds to the single payout scenario under the terms of the PSUs.

(3)

Amounts reported represent performance-based cash bonuses earned during the year and paid subsequent to year end, as further described above under “—Annual Performance-Based Cash Bonuses,” excluding the discretionary portion included in the Bonus column of the table above.

(4)

The amount reported for Mr. Maetzold for 2022 reflects $18,300 in 401(k) matching contributions. The amount reported for Mr. Stokes for 2022 reflects $50,860 paid by the Company to reimburse Mr. Stokes for the cost of vehicle lease payments, lodging, commercial air travel and parking attributable to commuting from his home in Charlotte, North Carolina to our offices in Friendswood, Texas and $18,300 in 401(k) matching contributions. The amount reported for both Mr. Juvenal and Ms. Oelschlager for 2022 reflects $18,300 in 401(k) matching contributions.

(5)

No amounts are reported for Mr. Juvenal or Ms. Oelschlager for the year 2020 since each first became an NEO after that year.

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Executive Compensation Tables

GRANTS OF PLAN-BASED AWARDS

       Estimated future payouts under
non-equity incentive plan
awards(1)
  

Estimated future payouts
under equity incentive plan
awards

(in shares)(2)

       

Name

 Award Type Grant Date  Threshold  Target  Maximum  Threshold  Target  Maximum  All Other
Stock
Awards:
Number of
Shares of
Stock (#)(3)
  Grant Date
Fair Value of
Stock
Awards(4)
 

Derek J. Maetzold

 Cash Incentive  $294,525  $561,000  $855,525              $ 
 Time-based RSUs  12/9/2022  $  $  $            133,983  $2,990,501 
 Performance-based RSUs (PSUs)  12/23/2022  $  $  $      133,982        $3,112,402 

Frank Stokes

 Cash Incentive  $122,200  $235,000  $352,500              $ 
 Time-based RSUs  12/9/2022  $  $  $            58,467  $1,304,983 
 Performance-based RSUs (PSUs)  12/23/2022  $  $  $      19,489        $452,729 

Tobin W. Juvenal

 Cash Incentive  $118,300  $227,500  $341,250              $ 
 Time-based RSUs  12/9/2022  $  $  $            63,844  $1,424,998 
 Performance-based RSUs (PSUs)  12/23/2022  $  $  $      21,281        $494,358 

Kristen M. Oelschlager

 Cash Incentive  $118,300  $227,500  $341,250              $ 
 Time-based RSUs  12/9/2022  $  $  $            63,844  $1,424,998 
 Performance-based RSUs (PSUs)  12/23/2022  $  $  $      21,281        $494,358 

(1)

The amounts reported in these columns represent the range of possible annual cash incentive amounts (at the threshold, target and maximum levels) that could have been paid to each of our NEOs for the year ended December 31, 2022 pursuant to their annual performance-based cash bonus. Each of our NEOs’ cash bonuses, other than Mr. Maetzold’s, is calculated based (i) 80% on achievement of corporate performance goals and (ii) 20% on individual performance objectives. Mr. Maetzold’s annual cash bonus is based entirely (100%) on achievement of corporate performance goals. The amounts shown as “Threshold” reflect the payment level under the cash bonus if the corporate performance goals were achieved at the minimum level of 52.5% (calculated based on the specific performance objectives and each goal set at the minimum level at which a payout for performance could have been earned) and at the minimum level at which a payout for individual performance could have been earned of 50% for our NEOs other than Mr. Maetzold. The amounts shown as “Target” reflect the payment level under the cash bonus if the corporate performance goals were achieved at the target level of 100% (calculated based on the specific performance objectives and goals each set at the target level) and at the target level of individual performance of 100% for our NEOs other than Mr. Maetzold. The amounts shown as “Maximum” reflect the payment level under the cash bonus if the corporate performance goals were achieved at the maximum level of 152.5% (calculated based on the specific performance objectives and goals each set at the maximum level) and at the maximum level of individual performance of 140% for our NEOs other than Mr. Maetzold. Actual payouts made under the Performance-Based Bonus differed based on the actual performance objectives and goals achieved. The actual cash bonus award earned by each NEO for performance in the year ended December 31, 2022 is set forth in the “Summary Compensation Table” above. As such, the amounts set forth in these columns do not represent additional compensation earned by the NEOs for the year ended December 31, 2022. Annual performance-based cash bonuses are discussed in greater detail under the heading “Annual Performance-Based Cash Bonuses above.

(2)

These columns show the range of possible share payouts for the PSU awards granted in December 2022, as described under the heading “Equity-Based Incentive Awards” above. The PSU awards provide for a single payout scenario (presented as “Target” in the table) and do not provide for any “threshold” or “maximum” amounts.

(3)

The amounts reported in this column reflect the time-based RSUs granted to our NEOs during the fiscal year ended December 31, 2022 under the 2019 Plan, which vest in four equal annual installments, beginning on December 9, 2023.

(4)

The amounts reported in this column represent the aggregate grant date fair value of the RSU and PSU awards discussed in footnotes (2) and (3), calculated in accordance with FASB ASC 718. For the PSUs, this amount is consistent with the value at the grant date based on the probable outcome of the performance condition.

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53


Executive Compensation Tables

OUTSTANDING EQUITY AWARDS AT FISCAL YEAR END

The following table presents information regarding outstanding equity awards held by our NEOs as of December 31, 2022.

     Option awards(1)(2)  Stock awards(1) 

Name

 Vesting
Commencement
Date
  Number of
Securities
Underlying
Unexercised
Options (#)
Exercisable
  Number of
Securities
Underlying
Unexercised
Options (#)
Unexercisable
  Option
Exercise
Price ($)(3)
  Option
Expiration
Date
  Number
of shares
or units
of stock
that have
not
vested
(#)(4)
  

Market

value of
shares or
units of
stock that
have not
vested ($)(5)

  Equity incentive
plan awards:
number of
unearned shares,
units or other
rights that have
not vested (#)(6)
  Equity incentive
plan awards:
market or payout
value of unearned
shares, units or
other rights that
have not vested
($)(5)
 

Derek J. Maetzold

  5/10/2018   98,441     $2.39   05/09/2028     $       
  11/6/2018   20,508     $2.39   11/11/2028     $       
  3/13/2019   61,525   4,102  $3.38   03/12/2029     $       
  3/27/2019   10,686     $3.72(7)   03/26/2024     $       
  12/13/2019   127,500   42,500  $29.50   12/12/2029     $       
  12/10/2020   43,550   43,550  $59.16   12/09/2030   10,725  $252,467       
  12/10/2021   26,594   79,782  $40.52   12/09/2031   46,273  $1,089,266       
  12/9/2022        $      133,983  $3,153,960       
  12/23/2022        $        $   133,982  $3,153,936 

Frank Stokes

  12/4/2017   25,137     $2.39   05/09/2028     $       
  3/13/2019   20,917   1,795  $3.38   03/12/2029     $       
  12/13/2019   41,250   13,750  $29.50   12/12/2029     $       
  12/10/2020   15,500   15,500  $59.16   12/09/2030   4,000  $94,160       
  12/10/2021   10,637   31,913  $40.52   12/09/2031   18,509  $435,702       
  12/9/2022        $      58,467  $1,376,313       
  12/23/2022        $        $   19,489  $458,771 

Tobin W. Juvenal

  5/10/2018   9,474     $2.39   05/09/2028     $       
  3/13/2019   23,071   1,539  $3.38   03/12/2029     $       
  12/13/2019   26,250   8,750  $29.50   12/12/2029     $       
  8/4/2020   17,500   12,500  $41.36   08/03/2030     $       
  12/10/2020   14,500   14,500  $59.16   12/09/2030   3,500  $82,390       
  12/10/2021   10,637   31,913  $40.52   12/09/2031   18,509  $435,702       
  12/9/2022        $      63,844  $1,502,888       
  12/23/2022        $        $   21,281  $500,955 

Kristen M. Oelschlager

  7/21/2017   1,197     $2.36   07/20/2027     $       
  5/10/2018        $2.39   05/09/2028     $       
  11/6/2018   3,418     $2.39   11/11/2028     $       
  3/13/2019   23,071   1,539  $3.38   03/12/2029     $       
  12/13/2019   26,250   8,750  $29.50   12/12/2029     $       
  8/4/2020   17,500   12,500  $41.36   08/03/2030     $       
  12/10/2020   14,500   14,500  $59.16   12/09/2030   3,500  $82,390       
  12/10/2021   10,637   31,913  $40.52   12/09/2031   18,509  $435,702       
  12/9/2022        $      63,844  $1,502,888       
  12/23/2022        $        $   21,281  $500,955 

(1)

All of the option awards were granted under either the 2008 Plan, the 2018 Plan or the 2019 Plan and all of the stock awards were granted under the 2019 Plan. Additional information on our equity plans is set forth in Note 14 to our consolidated financial statements appearing in our Annual Report on Form 10-K for the fiscal year ended December 31, 2022.

(2)

Except for the options to purchase 10,686 shares of common stock granted to Mr. Maetzold with a vesting commencement date of March 13, 2019, which were fully vested upon issuance, each option award vests as follows: 25% of the shares subject to the option vest on the first anniversary of the vesting commencement date, and the balance of the shares vest in equal monthly installments thereafter over the next 36 months, provided in each case that the holder is then providing services to us in accordance with the terms of the 2008 Plan, the 2018 Plan or the 2019 Plan, as applicable. Certain option awards are subject to acceleration of vesting, as described under “—Potential Benefits upon Termination or Change-in-Control.”

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Executive Compensation Tables

(3)

Unless otherwise indicated, all of the option awards were granted with a per share exercise price equal to the fair market value of one share of our common stock on the date of grant. Prior to the IPO, the fair market value of our common stock was determined in good faith by our board of directors. Following the IPO, the fair market value of our common stock is the closing selling price per share of our common stock as reported on the Nasdaq on the date of grant or other relevant determination date.

(4)

This column consists of time-based RSUs, which vest in four equal annual installments beginning on the first anniversary of the vesting commencement date.

(5)

Calculated using a price of $23.54 per share, which was the closing price of our common stock as reported on the Nasdaq on December 30, 2022, the last trading day of 2022. With respect to the performance-based RSUs discussed in footnote (6), the amounts shown in this column reflect the single payout scenario for the awards.

(6)

This column consists of performance-based RSUs granted in December 2022, which vest based on the achievement of the Revenue Goal and a specified service period. If the Revenue Goal is achieved, then 50% of the performance-based RSUs will vest on the Initial Vesting Date, and the remaining 50% will vest on the one-year anniversary of the Initial Vesting Date. The PSUs provide for a single payout scenario, which is used as the basis for the presentation of the PSUs in the table above. For more information, please see “Compensation Discussion and Analysis—Elements of our Executive Compensation Program—Equity-Based Incentive Awards.”

(7)

The fair market value of one share of our common stock on the date of grant, as determined in good faith by our board of directors, was $3.38. On the date of grant, Mr. Maetzold owned more than 10% of the voting power of all classes of our stock. Pursuant to the 2018 Plan, the exercise price per share for the incentive stock option award granted to Mr. Maetzold on March 27, 2019, is $3.72, which represents 110% of the fair market value of one share of our common stock on the date of grant.

We did not engage in any repricing or other modifications or cancellations to any of our NEOs’ outstanding equity awards during the average of the closing prices of the Company’s common stock for each trading day within the 30 calendar days prior to the grant date. fiscal year ended December 31, 2022.

OPTION EXERCISES AND STOCK VESTED IN 2022

The total number of total stock option equivalent shares is then allocated as follows: (i) 67% to the grantfollowing table sets forth information regarding exercises of stock options and (ii) 33%, dividedvesting of RSU awards by two,our NEOs during the year ended December 31, 2022.

   Option Awards   Stock Awards 

Name

  

Number of shares

acquired on

exercise

(#)

   

Value

realized on

exercise

($)(1)

   

Number of shares

acquired on
vesting

(#)

   

Value

realized on

vesting

($)(2)

 

Derek J. Maetzold

   10,000    $203,300    20,787    $463,966 

Frank Stokes

   4,000    $62,360    8,170    $182,354 

Tobin W. Juvenal

   3,700    $68,945    7,920    $176,774 

Kristen M. Oelschlager

   7,178    $136,741    7,920    $176,774 

(1)

Calculated based on the difference between the exercise price of each option exercised and the closing price of our common stock on the date of exercise multiplied by the number of shares underlying each option exercised, and does not represent actual amounts received by the NEOs as a result of the option exercises.

(2)

Calculated based on the closing price of our common stock on the vesting date multiplied by the number of shares underlying each award vested.

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Executive Compensation Tables

POTENTIAL PAYMENTS UPON TERMINATION OR CHANGE-IN-CONTROL

The following table describes the potential payments and benefits to which the NEOs would have been entitled assuming an eligible termination of employment or change of control occurred on December 30, 2022, the last business day of fiscal 2022. The amounts shown are estimates and do not necessarily reflect the actual amounts that these individuals would receive on termination of employment.

For further information regarding the following table, see the “—Potential Benefits upon Termination of Change-in-Control” section of the Compensation Discussion and Analysis in this Proxy Statement. The amounts shown in the table do not include payments and benefits to the grantextent they are provided generally to all salaried employees upon termination of RSUs,employment and do not discriminate in each case subject to certain rounding conventions. For stock option grants, one-thirdscope, terms or operation in favor of the underlying shares will vest oneNEOs. These include accrued but unpaid salary and distributions of vested plan balances under our 401(k) plan.

Name

  Death or
Disability
   Termination
For Cause
   Resignation
Without Good
Reason
   Prior to the
Occurrence of
Change in Control;
Involuntarily
Termination Without
Cause; Resignation
With Good Reason
   Following the
Occurrence of
Change in Control;
Involuntarily
Termination Without
Cause; Resignation
With Good Reason
 

Derek J. Maetzold

          

Salary severance

  $   $   $660,000   $990,000   $1,980,000 

Bonus severance

  $   $   $   $1,157,063   $2,314,125 

Vacation payout

  $337,076   $337,076   $337,076   $337,076   $337,076 

COBRA payments

  $   $   $   $21,836   $42,252 

Stock option acceleration(1)

  $82,696   $   $   $82,696   $82,696 

Total Estimated Value

  $419,772   $337,076   $997,076   $2,588,671   $4,756,149 

Frank Stokes

          

Salary severance

  $   $   $   $235,000   $470,000 

COBRA payments

  $   $   $   $9,646   $19,293 

Stock option acceleration(1)

  $   $   $   $36,187   $36,187 

Total Estimated Value

  $   $   $   $280,833   $525,480 

Tobin W. Juvenal

          

Salary severance

  $   $   $   $   $455,000 

Bonus severance

  $   $   $   $   $309,400 

COBRA payments

  $   $   $   $   $20,090 

Stock option acceleration(1)

  $   $   $   $31,026   $31,026 

Total Estimated Value

  $   $   $   $31,026   $815,516 

Kristen M. Oelschlager

          

Salary severance

  $   $   $   $227,500   $445,000 

Bonus severance

  $   $   $   $   $309,400 

COBRA payments

  $   $   $   $   $28,486 

Stock option acceleration(1)

  $   $   $   $31,026   $31,026 

Total Estimated Value

  $   $   $   $258,526   $813,912 

(1)

For each of the applicable outstanding unvested options, the dollar amount is calculated as the excess, if any, of the closing price of our common stock on December 30, 2022 ($23.54 per share) over the option exercise price, multiplied by the number of shares underlying the option.

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CEO Pay Ratio

As required by Section 953(b) of the Dodd-Frank Act, and Item 402(u) of Regulation S-K, we are providing the following information about the relationship of the annual total compensation of Derek Maetzold, our CEO, and the median annual total compensation of our employees during fiscal year from2022. We believe that the date of grant, with the remainder vestingpay ratio included in equal monthly installments over the remaining two-year period. For RSU grants, shares vestthis information is a reasonable estimate calculated in a seriesmanner consistent with Item 402(u) of three successive equal annual installments overRegulation S-K.

We identified our median employee as of December 31, 2022 based on our entire workforce of 543 employees after excluding our CEO and one non-U.S. employee. To identify the three-year period measured frommedian employee, we considered gross compensation totals for the dateyear ended December 31, 2022 as our consistently applied measure of grant.

The second amendment also amended the annual grants to consist of both options to purchase shares of common stock and RSUs having an aggregate value of $175,000. Following the amendment, the total number of shares subject to the annual grantcompensation. Gross compensation is now calculated as the numbersum of stock option equivalent shares equalregular salary/wages, bonuses paid and the grant date fair value of equity awards. We annualized salaries for hires made during the year. After identifying the median employee, we calculated the median employee’s compensation in accordance with the requirements of Item 402(c)(2)(x) of Regulation S-K applicable to the aggregate valueSummary Compensation Table in this Proxy Statement. Our CEO had annual total compensation in 2022 of $7,552,577 and our Median Employee had annual total compensation of $185,352. Therefore, we estimate that our CEO’s annual total compensation in 2022 was 41 times that of the median of the annual grants,total compensation of all of our employees.

Because the SEC rules for identifying the median compensated employee and calculating the pay ratio based on that employee’s annual total compensation allow companies to adopt a Black-Scholes valuation methodologyvariety of methodologies, to apply certain exclusions, and assumed stock price equalto make reasonable estimates and assumptions that reflect their compensation practices, the pay ratio reported by other companies may not be comparable to the averagepay ratio reported above, as other companies may have different employment and compensation practices and may use different methodologies, exclusions, estimates and assumptions in calculating their own pay ratios.

CASTLE BIOSCIENCES | 2023 Proxy Statement

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Pay Versus Performance
We are required by SEC rules to disclose certain information regarding compensation paid to our NEOs. The amounts set forth below under the headings “Compensation Actually Paid to PEO” and “Average Compensation Actually Paid to
Non-PEO
NEOs” have been calculated in a manner consistent with Item 402(v) of Regulation
S-K.
Footnote (2) below sets forth the closing prices ofadjustments from the Company’s common stockTotal Compensation for each trading day within the 30 calendar days prior to the grant date. The total number of stock option equivalent shares is then allocated as follows: (i) 67% to the grant of stock options and (ii) 33%, divided by two, to the annual grant of RSUs, in each subject to certain rounding conventions. The shares subject to the annual grant through both stock options and RSUs will vest in full on the one-year anniversary of the date of grant.
Upon the recommendation of the Compensation Committee, our board of directors approved a third amendment to our non-employee director compensation policy, effective May 7, 2021, which provided that any non-employee director who was not appointed to the board of directors prior to the first board meeting of the Company’s first fiscal quarter shall not receive an annual grant for that year.
Upon the recommendation of the Compensation Committee, our board of directors approved a fourth amendment to our non-employee director compensation policy, effective January 24, 2022, which amended our non-employee director compensation policy to increase both the annual cash retainer for service on our board of directors and the additional annual cash retainer for service as chairperson of the board of directors from $40,000 to $42,000. The aggregate value of annual grants was increased from $175,000 to $200,000, and the eligibility of non-employee directors appointed to the board of directors following the first board meeting of the Company’s first fiscal quarter to receive an annual grant for that year was reinstated. Lastly, the fourth amendment revised the allocation of the annual grant as follows: (i) 50% to the grant of stock options and (ii) 50%, divided by two, to the grant of RSUs, in each case subject to certain rounding conventions.
Each of the option or RSU grants described above will be granted under the 2019 Plan, the terms of which are described in more detail below under “— Equity Benefit Plans — 2019 Equity Incentive Plan.” Each such option or RSU grant will vest and,NEO reported in the case of options, become exercisable, subject toSummary Compensation Table for the director’s continuous service to us, provided that each option or RSU will vest in full upon a change in control (as defined in the 2019 Plan). The term of each option will be 10 years, subject to earlier terminationrelevant year.
                   
Value of Initial Fixed $100
Investment Based on:
        
Year
(a)
  
Summary
Compensation
Table Total
for PEO
(1)
(b)
   
Compensation
Actually Paid
to PEO
(2)
(c)
   
Average
Summary
Compensation
Table Total for
Non-PEO

NEOs
(1)
(d)
   
Average
Compensation
Actually Paid
to
Non-PEO

NEOs
(2)
(e)
   
Total
Shareholder
Return
(3)
(f)
   
Peer Group
Total
Shareholder
Return
(3)
(g)
   
Net Loss
(4)
(in thousands)
(h)
  
Total
Revenue
(5)
(in thousands)
(i)
 
2022  $7,552,577   $3,081,353   $2,670,395   $990,266   $68   $113   $(67,138 $137,039 
2021  $6,521,857   $2,127,860   $2,813,079   $1,240,785   $125   $125   $(31,292 $94,085 
2020  $5,344,639   $13,311,700   $1,953,619   $4,526,526   $195   $125   $(10,284 $62,649 
(1)
Mr. Maetzold was our PEO for each of 2020, 2021 and 2022. In this disclosure, we refer to our NEOs other than Mr. Maetzold in any fiscal year as our “Other NEOs” or our
“Non-PEO
NEOs.” Frank Stokes, Kristen M. Oelschlager and Tobin W. Juvenal were “Other NEOs” for 2022 and 2021. Frank Stokes and Bernhard E. Spiess, our former Chief Business Officer, were the “Other NEOs” for 2020. The dollar amounts are the total compensation for the covered fiscal year as reported in the Summary Compensation Table pursuant to Regulation
S-K,
item 402(c)(2)(x), as described under “—Summary Compensation Table.” In the case of the Other NEOs, the amounts reported are an average of the total compensation for the covered fiscal years.
(2)For each year, in determining both the compensation actually (“CAP”) for our PEO and the average CAP for our Other NEOs, we deducted or added back the following amounts from or to the total amounts of compensation reported in column (b) and column (d) for such year.
Mr. Maetzold’s CAP is calculated as provided in the 2019 Plan, provided that upon a termination of service other than for death, disability or cause, the post-termination exercise period will be three months from the date of termination. An eligible director may decline all or any portion of his or her compensation by giving notice to us prior to the date cash may be paid or equity awardsfollows:
Year
  
Total
Compensation
from Summary
Compensation
Table
   
Stock Awards
Value from
Summary
Compensation
Table
  
Option
Awards Value
from
Summary
Compensation
Table
  
Change in Fair
Value of
Awards
Vesting
During the
Year
  
Change in Fair
Value of
Outstanding and
Unvested Equity
Awards
  
Year-End Fair

Value of
Equity
Awards
Granted
During the
Year
   
Compensation
Actually Paid
 
2022  $7,552,577   $(6,102,902 $  $(1,590,589 $(3,085,629 $6,307,896   $3,081,353 
2021  $6,521,857   $(2,500,003 $(2,656,954 $(535,559 $(4,200,151 $5,498,670   $2,127,860 
2020  $5,344,639   $(1,268,982 $(3,056,657 $1,060,493  $6,181,735  $5,050,472   $13,311,700 
Other NEOs average CAP are to be granted, as the case may be.follows:

Year
  
Total
Compensation
from Summary
Compensation
Table
   
Stock Awards
Value from
Summary
Compensation
Table
  
Option
Awards Value
from
Summary
Compensation
Table
  
Change in Fair
Value of
Awards
Vesting
During the
Year
  
Change in Fair
Value of
Outstanding and
Unvested Equity
Awards
  
Year-End Fair

Value of
Equity Awards
Granted
During the
Year
   
Average
Compensation
Actually Paid
 
2022  $2,670,395   $(1,865,475 $  $(549,674 $(1,212,570 $1,947,590   $990,266 
2021  $2,813,079   $(999,993 $(1,062,350 $(215,497 $(1,493,903 $2,199,449   $1,240,785 
2020  $1,953,619   $(414,120 $(947,196 $332,321  $2,012,760  $1,589,142   $4,526,526 
(3)
For each fiscal year disclosed the cumulative total shareholder return and peer group cumulative total shareholder return is calculated in the same manner as Item 201(e) of Regulation
S-K
assuming an initial investment of $100 on December 31, 2019. The peer group used in this calculation is the NASDAQ Biotechnology Total Return Index.
(4)
The dollar amounts presented are from our consolidated financial statements appearing in our Annual Report on Form
10-K
for each of the reported fiscal years.
(5)
This is our Company-Selected Measure provided in accordance in with Item 402(v)(2)(vi) of Regulation
S-K.
The dollar amounts presented are from our consolidated financial statements appearing in our Annual Report on Form
10-K
for each of the reported fiscal years.
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2023 Proxy Statement
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Table of Contents
Pay Versus Performance
EQUITY COMPENSATION PLAN INFORMATION
The following chart shows the relationships between (a) the compensation actually paid to the PEO, (b) the average compensation actually paid to the
Non-PEO
NEOs included in the Summary Compensation Table and (c) our company-selected measure of total revenue.
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The following chart shows the relationships between (a) the compensation actually paid to the PEO, (b) the average compensation actually paid to the
Non-PEO
NEOs included in the Summary Compensation Table and (c) our total shareholder return and the peer group total shareholder return.
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CASTLE BIOSCIENCES
| 2023 Proxy Statement
59

Pay Versus Performance
The following chart shows the relationships between (a) the compensation actually paid to the PEO, (b) the average compensation actually paid to the
Non-PEO
NEOs in the Summary Compensation Table and (c) our net loss.
LOGO
The following performance measures are the Company’s most important performance measures used by us to link compensation actually paid to our NEOs for the
year-end
December 31, 2022:
Metric
Financial Performance Metric:
Revenue
Non-financial
Performance Metrics:
Delivered Test Reports
Reimbursement Rates for our Tests
Positive Coverage Decisions for our Tests
Pipeline Milestones
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2023 Proxy Statement
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Delinquent Section 16(a) Reports

Section 16(a) of the Exchange Act requires our directors and executive officers, and persons who own more than ten percent of our common stock, to file with the SEC initial reports of ownership and reports of changes in beneficial ownership of our common stock.

Based on a review of Form 3 and Form 4 filings with the SEC and representations received from our current directors and executive officers that no Form 5 filings are required, we believe that all Section 16(a) requirements were met with respect to the fiscal year ended December 31, 2022, except as follows: one Form 4 for Tiffany P. Olson covering one transaction was filed late on July 7, 2022.

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Equity Compensation Plan Information

The following table provides certain information with respect to all of the Company’s equity compensation plans in effect as of December 31, 2021:

Plan category
Number of securities to be issued upon exercise of outstanding options, warrants and rights
(a)(2)
Weighted-average exercise price of outstanding options, warrants and rights
(b)(3)
Number of securities remaining available for future issuance under equity compensation plans (excluding securities reflected in column (a))
(c)(4)
Equity compensation plans approved by security holders(1)
4,636,862

$34.75686,207
Equity compensation plans not approved by security holders
Total4,636,862$34.75686,207
2022:

(1)Consists of the 2008 Plan, the 2018 Plan, the 2019 Plan and the Castle Biosciences, Inc. 2019 Employee Stock Purchase Plan (the “ESPP”).
(2)Consists of outstanding options to purchase 3,586,688 shares of common stock and 1,050,174 outstanding RSUs.

Plan category

  

Number of securities to
be issued upon exercise
of outstanding options,
warrants and rights

(a)(2)

   

Weighted-average
exercise price of
outstanding options,
warrants and rights

(b)(3)

   

Number of securities remaining
available for future issuance under
equity compensation plans (excluding
securities reflected in column (a))

(c)

 

Equity compensation plans approved by security holders(1)

   7,093,795   $35.11    814,599                (4) 

Equity compensation plans not approved by security holders(5)

           350,000      

Total

   7,093,795   $35.11    1,164,599                (4) 

(1)

Consists of the 2008 Plan, the 2018 Plan, the 2019 Plan and the Castle Biosciences, Inc. 2019 Employee Stock Purchase Plan (the “ESPP”). Additional information on these equity plans is set forth in Note 14 to our consolidated financial statements appearing in our Annual Report on Form 10-K for the fiscal year ended December 31, 2022.

(2)

Consists of outstanding options to purchase 186,748 shares of common stock under the 2008 Plan, outstanding options to purchase 362,829 shares of common stock under the 2018 Plan, outstanding options to purchase 2,870,263 shares of common stock under the 2019 Plan, 3,477,922 outstanding RSUs under the 2019 Plan and 196,033 outstanding PSUs under the 2019 Plan. Excludes purchase rights accruing under the ESPP. Shares reserved for issuance under the ESPP are included in column (c).

(3)

As RSU and PSU awards have no exercise price, the weighted-average exercise price excludes 3,477,922 outstanding RSUs and 196,033 outstanding PSUs.

(4)

Reflects 814,599 shares available for purchase under the ESPP. Excludes 265,536 shares for the ESPP are included in column (c).

(3)The weighted-average exercise price excludes 1,050,174 outstanding RSUs.
(4)Includes 46,741 shares available for issuance under the 2019 Plan and 639,466 shares available for purchase under the ESPP. Excludes automatic increases of 1,268,926 shares and 253,785 shares for the 2019 Plan and the ESPP, respectively, that became effective January 1, 2023, pursuant to “evergreen” provisions in the ESPP. Pursuant to such provision, on January 1st of each year through (and including) January 1, 2029, the number of shares authorized under the ESPP will be automatically increased by an amount equal to the lesser of: (a) 1% of the total number of shares of capital stock outstanding at December 31 of the preceding calendar year; (b) 411,935 shares; or (c) such lesser number of shares of common stock as our board of directors may designate prior to the applicable January 1st. No shares are available for future issuance under the 2019 Plan because as of December 31, 2022, we have granted awards that, upon exercise or settlement, would result in the issuance of 1,473,888 shares of common stock in excess of the number of shares authorized for issuance under the 2019 Plan. Under the evergreen provision of the 2019 Plan, effective January 1, 2023, 1,327,684 shares became available for issuance. Pursuant to such provision, on January 1st of each year through (and including) January 1, 2029, the number of shares authorized for issuance under the 2019 Plan will be automatically increased by an amount equal to the lesser of: (a) 5% of the total number of shares of capital stock of the Company outstanding on December 31 of the preceding calendar year; or (b) such lesser number of shares of common stock as our board of directors may designate prior to the applicable January 1st.

(5)

Consists of the Castle Biosciences, Inc. 2022 Inducement Plan (the “Inducement Plan”). See below under “Inducement Plan” for details.

INDUCEMENT PLAN

On December 22, 2022, pursuant to “evergreen” provisions in the 2019 Plan and the ESPP. On February 28, 2022, 42,332 shares of common stock were purchased under the ESPP.

Equity Benefit Plans
The principal features of our equity plans are summarized below.
2019 Equity Incentive Plan
Our board of directors adopted and our stockholders approved the 2019Inducement Plan.

Eligible Award Recipients. The Inducement Plan in July 2019. The 2019 Plan became effective in July 2019 in connectionis used exclusively for grants of awards to individuals that were not previously employees or directors of the Company, as an inducement material to the individual’s entry into employment with the IPO.Company under Nasdaq Marketplace Rule 5635(c)(4) and the related guidance under Nasdaq IM 5635-1.

Stock Awards. The 2019Inducement Plan is a successor to and continuation of the 2018 Plan. No further grants will be made under the 2018 Plan.

Stock Awards. The 2019 Plan provides for the grant of incentive stock options (“ISOs”), within the meaning of Section 422 of the Code, to employees, including employees of any parent or subsidiary, and for the grant of nonstatutory stock options (“NSOs”), stock appreciation rights, restricted stock awards, RSU awards, performance stock awards, performance cash awards and other forms of stock awards to employees, directors and consultants, including employees and consultants of our affiliates.
awards.

Authorized Shares. Initially, the The initial maximum number of shares of our common stock that may be issued under the 2019 Plan will be 3,907,776 shares, which is the sum of (1) 1,931,020 new shares, plus (2) the number of shares (not to exceed 1,976,756 shares) (i) that remained available for the issuance of awards under the 2018 Plan at the time the 2019 Plan became effective, and (ii) any shares subject to outstanding stock options or other stock awards that were granted under the 2008 Plan and the 2018 Plan that terminate or expire prior to exercise or settlement; are forfeited because of the failure to vest or otherwise return to us; or are reacquired or withheld (or not issued) to satisfy a tax withholding obligation or the purchase or exercise price. In addition, the number of shares of our common stock reserved for issuance under the 2019 Plan will automatically increase on January 1 of each calendar year, starting on January 1, 2020 through January 1, 2029, in an amount equal to 5% of the total number of shares of our capital stock outstanding on the last day of the calendar year before the date of each automatic increase, or a lesser number of shares determined by our board of directors. To date, pursuant to this automatic increase provision, an additional 3,366,095 shares have been authorized for future issuance under the 2019 Plan. The maximum number of shares of our common stock that may be issued on the exercise of ISOs under the 2019Inducement Plan is 11,723,328.

350,000 shares. Shares subject to stock awards granted under the 2019Inducement Plan that expire or terminate without being exercised in full or that are paid out in cash rather than in shares do not reduce the number of shares available for issuance under the 2019Inducement Plan. If any shares of common stock issued pursuant to a stock award are forfeited back to or repurchased or reacquired by us for any reason, the shares that are forfeited or repurchased or reacquired will revert to and again become

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2023 Proxy Statement

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Equity Compensation Plan Information

available for issuance under the 2019Inducement Plan. Any shares reacquired in satisfaction of tax withholding obligations or as consideration for the exercise or purchase price of a stock award will again become available for issuance under the 2019Inducement Plan.

The maximum number of shares of common stock subject to stock awards granted under the 2019 Plan or otherwise during a single calendar year to any non-employee director, taken together with any cash fees paid by the Castle to such non-employee director during
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such calendar year for service on the board of directors, will not exceed $350,000 in total value (calculating the value of any such stock awards based on the grant date fair value of such stock awards for financial reporting purposes), or, with respect to the calendar year in which a non-employee director is first appointed or elected to the board of directors, $550,000.

Plan Administration. Our board of directors, or a duly authorized committee of our board of directors administers the 2019Inducement Plan and is referred to as the “plan administrator” herein. Our board of directors may also delegate some of its powers of administration of the Inducement Plan to onea committee or more of our officers the authority to (1) designate employees (other than officers) to receive specified stock awards and (2) determine the number of shares subject to such stock awards.committees. Under the 2019Inducement Plan, our board of directorsthe plan administrator has the authority to determine award recipients, grant dates, the numbers and types of stock awards to be granted, the applicable fair market value, and the provisions of each stock award, including the period of exercisability and the vesting schedule applicable to a stock award.

Awards may only be granted by either (i) a majority of our independent directors or (ii) our Compensation Committee.

Under the 2019Inducement Plan, neither the board of directors also generallynor any committee has the authority to effect, with the consent of any adversely affected participant, (A) the reduction of(i) reduce the exercise purchase,price or strike price of any outstanding award, (B) the cancellation ofoptions or stock appreciation rights, or (ii) cancel any outstanding award andoptions or stock appreciation rights that have an exercise price greater than the grantcurrent fair market value in substitution therefore of other awards,exchange for cash or other consideration, or (C) any otherawards, unless our stockholders have approved such an action that is treated as a repricing under generally accepted accounting principles.

within twelve months prior to such an event.

Stock Options. ISOsOptions and NSOs are granted underStock Appreciation Rights. Each stock option agreements adopted byor stock appreciation right is granted in such form and contain such terms and conditions as the plan administrator.administrator deems appropriate. All options are separately designated as NSOs at the time of grant. The plan administrator determines the exercise price for each stock options,option or stock appreciation right, within the terms and conditions of the 2019Inducement Plan, provided that the exercise price of a stock option or stock appreciation right generally cannot be less than 100% of the fair market value of our common stock on the date of grant. Options granted under the 2019 Plan vest at the rate specified in theThe vesting provisions of individual awards of stock option agreement as determined by the plan administrator.

options and stock appreciation rights may vary.

The plan administrator determines the term of stock options and stock appreciation rights granted under the 2019Inducement Plan, up to a maximum of 10 years. Unless the terms of an optionholder’sa stock option agreement or stock appreciation right agreement provide otherwise, if an optionholder’sa participant’s service relationship with us or any of our affiliates ceases for any reason other than disability, death, or cause, the optionholderparticipant may generally exercise any vested options or stock appreciation rights for a period of three months following the cessation of service. Thisservice, or such longer or shorter period may be extendedspecified in the event that exercise ofstock option agreement or stock appreciation right agreement, which period will not be less than 30 days if necessary to comply with applicable laws unless the optiontermination is prohibited by applicable securities laws or our insider trading policy.for cause. If an optionholder’sa participant’s service relationship with us or any of our affiliates ceases due to death, or an optionholdera participant dies within a certain period following cessation of service, the optionholderparticipant or a beneficiary may generally exercise any vested stock options or stock appreciation rights for a period of 18 months following the date of death. If an optionholder’sa participant’s service relationship with us or any of our affiliates ceases due to disability, the optionholderparticipant may generally exercise any vested stock options or stock appreciation rights for a period of 12 months following the cessation of service. In the event of a termination for cause, options generally terminate upon the termination date. In no event may an option be exercised beyond the expiration of its term.

Acceptable consideration for the purchase of common stock issued upon the exercise of a stock option will be determined by the plan administrator and may include (1) cash, check, bank draft or money order, (2) a broker-assisted cashless exercise, (3) the tender of shares of our common stock previously owned by the optionholder,participant, (4) a net exercise of the option, if it is an NSO, or (5) other legal consideration approved by the plan administrator.

Unless the plan administrator provides otherwise, stock options and stock appreciation rights generally are not transferable except by will or the laws of descent and distribution. Subject to approval of the plan administrator or a duly authorized officer in each case, (i) ana stock option or stock appreciation right may be transferred pursuant to a domestic relations order, official marital settlement agreement, or other divorce or separation instrument and (ii) an optionholdera participant may designate a beneficiary who may exercise the option following the optionholder’sparticipant’s death.

Tax Limitations on ISOs. The aggregate fair market value, determined at the time of grant, of our common stock with respect to ISOs that are exercisable for the first time by an award holder during any calendar year under all of our stock plans may not exceed $100,000. Options or portions thereof that exceed such limit will generally be treated as NSOs. No ISO may be granted to any person who, at the time of the grant, owns or is deemed to own stock possessing more than 10% of our total combined voting power or that of any of our affiliates unless (1) the option exercise price is at least 110% of the fair market value of the stock subject to the option on the date of grant, and (2) the term of the ISO does not exceed five years from the date of grant.

Restricted Stock Unit Awards. RSU awards are granted under RSU award agreements adopted byin such form and contain such terms and conditions as the plan administrator.administrator deems appropriate. RSU awards may be granted in consideration for any form of legal consideration that may be acceptable to our board of directors and permissible under applicable law. An RSU award may be settled by cash, delivery of stock, a combination of cash and stock as deemed appropriate by the plan administrator, or in any other form of consideration set forth in the RSU award agreement. Additionally, dividend equivalents may be credited in respect of shares covered by an RSU award. Except as otherwise provided in the applicable award agreement, RSU awards that have not vested will be forfeited once the participant’s continuous service ends for any reason.

Restricted Stock Awards. Restricted stock awards are granted under restricted stock award agreements adopted byin such form and contain such terms and conditions as the plan administrator.administrator deems appropriate. A restricted stock award may be awarded in consideration for cash, check, bank draft or money order, past or future services to us, or any other form of legal consideration that may be acceptable to our board of directors and permissible under applicable law. The plan administrator determines the terms and conditions of restricted stock awards, including vesting and forfeiture terms. If a participant’s service relationship with us ends for any reason, we may receive any or all of the shares of common stock held

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by the participant that have not vested as of the date the participant terminates service with us through a forfeiture condition or a repurchase right.

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Stock Appreciation Rights. Stock appreciation rights are granted under stock appreciation right agreements adopted by the plan administrator.

Equity Compensation Plan Information

Performance Awards. The plan administrator determines the purchase price or strike price for a stock appreciation right, which generally cannot be less than 100% of the fair market value of our common stock on the date of grant. A stock appreciation right granted under the 2019 Plan vests at the rate specified in the stock appreciation right agreement as determined by the plan administrator.

The plan administrator determines the term of stock appreciation rights granted under the 2019 Plan, up to a maximum of ten years. If a participant’s service relationship with us or any of our affiliates ceases for any reason other than cause, disability, or death, the participant may generally exercise any vested stock appreciation right for a period of three months following the cessation of service. This period may be further extended in the event that exercise of the stock appreciation right following such a termination of service is prohibited by applicable securities laws or our insider trading policy. If a participant’s service relationship with us, or any of our affiliates, ceases due to disability or death, or a participant dies within a certain period following cessation of service, the participant or a beneficiary may generally exercise any vested stock appreciation right for a period of 12 months in the event of disability and 18 months in the event of death. In the event of a termination for cause, stock appreciation rights generally terminate immediately upon the occurrence of the event giving rise to the termination of the individual for cause. In no event may a stock appreciation right be exercised beyond the expiration of its term.
Performance Awards. The 2019Inducement Plan permits the grant of performance-based stock and cash awards. Our compensation committeeThe plan administrator may structure awards so that the stock or cash will be issued or paid only following the achievement of certain pre-established performance goals during a designated performance period.

The performance goals that may be selected include one or more of the following: (i) sales; (ii) revenues; (iii) assets; (iv) expenses; (v) market penetration or expansion; (vi) earnings from operations; (vii) earnings before or after deduction for all or any portion of interest, taxes, depreciation, amortization, incentives, service fees or extraordinary or special items, whether or not on a continuing operations or an aggregate or per share basis; (viii) net income or net income per common share (basic or diluted); (ix) return on equity, investment, capital or assets; (x) one or more operating ratios; (xi) borrowing levels, leverage ratios or credit rating; (xii) market share; (xiii) capital expenditures; (xiv) cash flow, free cash flow, cash flow return on investment, or net cash provided by operations; (xv) stock price, dividends or total stockholder return; (xvi) development of new technologies or products; (xvii) sales of particular products or services; (xviii) economic value created or added; (xix) operating margin or profit margin; (xx) customer acquisition or retention; (xxi) raising or refinancing of capital; (xxii) successful hiring of key individuals; (xxiii) resolution of significant litigation; (xxiv) acquisitions and divestitures (in whole or in part); (xxv) joint ventures and strategic alliances; (xxvi) spin-offs, split-ups and the like; (xxvii) reorganizations; (xxviii) recapitalizations, restructurings, financings (issuance of debt or equity) or refinancings; (xxix) or strategic business criteria, consisting of one or more objectives based on the following goals: achievement of timely development, design management or enrollment, meeting specified market penetration or value added, payor acceptance, patient adherence, peer reviewed publications, issuance of new patents, establishment of or securing of licenses to intellectual property, product development or introduction (including, without limitation, any clinical trial accomplishments, regulatory or other filings, approvals or milestones, discovery of novel products, maintenance of multiple products in pipeline, product launch or other product development milestones), geographic business expansion, cost targets, cost reductions or savings, customer satisfaction, operating efficiency, acquisition or retention, employee satisfaction, information technology, corporate development (including, without limitation, licenses, innovation, research or establishment of third-partythird party collaborations), manufacturing or process development, legal compliance or risk reduction, patent application or issuance goals, or goals relating to acquisitions, divestitures or other business combinations (in whole or in part), joint ventures or strategic alliances; and (xxx) other measures of performance selected by the boarda majority of directors.

our independent directors or our compensation committee.

The performance goals may be based on company-wide performance or performance of one or more business units, divisions, affiliates, or business segments, and may be either absolute or relative to the performance of one or more comparable companies or the performance of one or more relevant indices. Our boardA majority of our independent directors or our compensation committee is authorized at any time in its sole discretion, to adjust or modify the calculation of a performance goal for such performance period in order to prevent the dilution or enlargement of the rights of participants, (a) in the event of, or in anticipation of, any unusual or extraordinary corporate item, transaction, event or development; (b) in recognition of, or in anticipation of, any other unusual or nonrecurring events affecting us, or our financial statements in response to, or in anticipation of, changes in applicable laws, regulations, accounting principles, or business conditions; or (c) in view of a majority of our independent directors or the board of director’scompensation committee’s assessment of our business strategy, performance of comparable organizations, economic and business conditions, and any other circumstances deemed relevant. Specifically, the boarda majority of our independent directors or our compensation committee is authorized to make adjustment in the method of calculating attainment of performance goals and objectives for a performance period as follows: (i) to exclude the dilutive effects of acquisitions or joint ventures; (ii) to assume that any business divested by us achieved performance objectives at targeted levels during the balance of a performance period following such divestiture; and (iii) to exclude the effect of any change in the outstanding shares of our common stock by reason of any stock dividend or split, stock repurchase, reorganization, recapitalization, merger, consolidation, spin-off, combination or exchange of shares or other similar corporate change, or any distributions to common stockholders other than regular cash dividends. In addition, the boarda majority of our independent directors or our compensation committee is authorized to make adjustment in the method of

33

calculating attainment of performance goals and objectives for a performance period as follows: (i) to exclude restructuring and/or other nonrecurring charges; (ii) to exclude exchange rate effects, as applicable, for non-U.S. dollar denominated net sales and operating earnings; (iii) to exclude the effects of changes to generally accepted accounting standards required by the Financial Accounting Standards Board;FASB; (iv) to exclude the effects of any items that are “unusual” in nature or occur “infrequently” as determined under generally accepted accounting principles; (v) to exclude the effects to any statutory adjustments to corporate tax rates; and (vi) to make other appropriate adjustments selected by the boarda majority of directors.
our independent directors or our compensation committee.

Other Stock Awards. The plan administrator may grant other awards based in whole or in part by reference to our common stock. The plan administrator will set the number of shares under the stock award and all other terms and conditions of such awards.

Changes to Capital Structure.

Capitalization Adjustments. In the event there is a specified type of change in our capital structure, such as a stock split, reverse stock split, or recapitalization, appropriate adjustments will be made to (1) the class and maximum number of shares reserved for issuance under the 2019Inducement Plan, (2) the class and maximum number of shares by which the share reserve may increase automatically each year, (3) the class and maximum number of shares that may be issued on the exercise of ISOs and (4) the class and number of shares and exercise price, strike price, or purchase price, if applicable, of all outstanding stock awards.

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Equity Compensation Plan Information

Corporate Transactions. The 2019Inducement Plan provides that in the event of certain specified significant corporate transactions (or a change in control, as defined below), unless otherwise provided in an award agreement or other written agreement between us and the award holder, the plan administrator may take one or more of the following actions with respect to such stock awards:

arrange for the assumption, continuation, or substitution of a stock award by a successor corporation;
arrange for the assignment of any reacquisition or repurchase rights held by us to a successor corporation;
accelerate the vesting, in whole or in part, of the stock award and provide for its termination if not exercised (if applicable) at or before the effective time of the transaction;
arrange for the lapse, in whole or in part, of any reacquisition or repurchase rights held by us;
cancel or arrange for the cancellation of the stock award, to the extent not vested or not exercised before the effective time of the transaction, in exchange for a cash payment, if any; or
make a payment equal to the excess, if any, of (A) the value of the property the participant would have received on exercise of the award immediately before the effective time of the transaction, over (B) any exercise price payable by the participant in connection with the exercise.

arrange for the assumption, continuation, or substitution of a stock award by a successor corporation;

arrange for the assignment of any reacquisition or repurchase rights held by us to a successor corporation;

accelerate the vesting, in whole or in part, of the stock award and provide for its termination if not exercised (if applicable) at or before the effective time of the transaction;

arrange for the lapse, in whole or in part, of any reacquisition or repurchase rights held by us;

cancel or arrange for the cancellation of the stock award, to the extent not vested or not exercised before the effective time of the transaction, in exchange for a cash payment, if any; or

make a payment equal to the excess, if any, of (A) the value of the property the participant would have received on exercise of the award immediately before the effective time of the transaction, over (B) any exercise price payable by the participant in connection with the exercise.

The plan administrator is not obligated to treat all stock awards or portions of stock awards in the same manner and is not obligated to take the same actions with respect to all participants.

Under the 2019Inducement Plan, a corporate transaction is generally the consummation of: (1) a sale or other disposition of all or substantially all of our assets, (2) the sale or other disposition of more than 50% of our outstanding securities, (3) a merger or consolidation where we do not survive the transaction or (4) a merger or consolidation where we do survive the transaction but the shares of our common stock outstanding immediately before such transaction are converted or exchanged into other property by virtue of the transaction.

Change in Control. In the event of a change in control, the plan administrator may take any of the above-mentioned actions. Awards granted under the 2019Inducement Plan may be subject to additional acceleration of vesting and exercisability upon or after a change in control as may be provided in the applicable stock award agreement or in any other written agreement between us or any affiliate and the participant, but in the absence of such provision, no such acceleration will automatically occur. Under the 2019Inducement Plan, a change in control is generally (1) the acquisition by any person or company of more than 50% of the combined voting power of our then outstandingthen-outstanding stock, (2) a merger, consolidation or similar transaction in which our stockholders immediately before the transaction do not own, directly or indirectly, more than 50% of the combined voting power of the surviving entity (or the parent of the surviving entity) in substantially the same proportions as their ownership immediately prior to such transaction, (3) a sale, lease, exclusive license or other disposition of all or substantially all of our assets other than to an entity more than 50% of the combined voting power of which is owned by our stockholders in substantially the same proportions as their ownership of our outstanding voting securities immediately prior to such transaction, (4) a complete dissolution or liquidation of us or (5) when a majority of our board of directors becomes comprised of individuals who were not serving on our board of directors on July 24, 2019December 22, 2022 (the effective date of the underwriting agreement related to the IPO)Inducement Plan), or the incumbent board, or whose nomination, appointment, or election was not approved by a majority of the incumbent board still in office.

Plan Amendment or Termination. Our board of directors has the authority to amend, suspend, or terminate the 2019Inducement Plan, provided that such action does not materially impair the existing rights of any participant without such participant’s written consent. Certain material amendments also requireStockholder approval is required for any amendment to the approval of our stockholders. No ISOs may be granted after the tenth anniversary of the earlier

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of (A) the date our board of directors adopts the 2019 Plan or (B) the date the 2019 Plan is approvedextent required by our stockholders.law. No stock awards may be granted under the 2019Inducement Plan while it is suspended or after it is terminated.

CASTLE BIOSCIENCES | 2023 Proxy Statement

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2018 Equity Incentive Plan
Our board of directors adopted the 2018 Plan in August 2018

Transactions with Related Persons and our stockholders approved the 2018 Plan in October 2018. Any shares remaining available for issuance under the 2018 Plan became available for issuance under the 2019 Plan at the time the 2019 Plan became effective. No further awards were granted under the 2018 Plan upon the effective date of the 2019 Plan.

Stock Awards. The 2018 Plan provides for the grant of ISOs within the meaning of Section 422 of the Code to employees, including employees of any parent or subsidiary, and for the grant of NSOs, stock appreciation rights, restricted stock awards, RSU awards and other stock awards to employees, directors and consultants, including employees and consultants of our affiliates. We only granted stock options under the 2018 Plan.
Authorized Shares. Subject to certain capitalization adjustments, the aggregate number of shares of common stock that may be issued pursuant to stock awards under the 2018 Plan, as amended, may not exceed a maximum of 699,928 shares, or the 2018 Plan’s share reserve, which number is the sum of (i) 555,050 new shares plus (ii) 144,878 shares subject to the 2008 Plan’s share reserve as of the effective date of the 2018 Plan. The 2018 Plan’s share reserve may be increased by up to 1,562,458 shares, which is equal to the number of shares that were subject to outstanding stock awards under the 2008 Plan as of the effective date of the 2018 Plan, that expire or terminate for any reason, are forfeited or otherwise return to us or are reacquired, withheld or not issued to satisfy a tax withholding obligation or to satisfy the exercise or purchase price of a stock award, as such shares become available from time to time. The maximum number of shares of our common stock that may be issued pursuant to the exercise of ISOs under the 2018 Plan is 4,235,018 shares.
Shares subject to stock awards granted under the 2018 Plan that expire or terminate without all of the shares covered by such stock award having been issued or that are settled in cash rather than in shares do not reduce the number of shares available for issuance under the 2018 Plan. Additionally, if any shares issued pursuant to a stock award are forfeited back to or repurchased or reacquired by us for any reason, including because of the failure to meet a contingency or condition required to vest, then the shares that are forfeited, repurchased or reacquired will revert to and again become available for issuance under the 2018 Plan. This includes shares used to pay the exercise price of a stock award or to satisfy the tax withholding obligations related to a stock award.
Plan Administration. Our board of directors, or a duly authorized committee of our board of directors, will administer the 2018 Plan and is referred to as the “plan administrator” herein. The plan administrator may also delegate to one or more of our officers the authority to (1) designate employees (other than officers) to receive specified stock awards and (2) determine the number of shares subject to such stock awards. Under the 2018 Plan, the plan administrator has the authority to determine award recipients, dates of grant, the numbers and types of stock awards to be granted, the applicable fair market value and the provisions of each stock award, including the period of their exercisability and the vesting schedule applicable to a stock award.
Under the 2018 Plan, the plan administrator also generally has the authority to effect, with the consent of any adversely affected participant, (1) the reduction of the exercise, purchase, or strike price of any outstanding award; (2) the cancellation of any outstanding award and the grant in substitution therefore of other awards, cash, or other consideration; or (3) any other action that is treated as a repricing under generally accepted accounting principles.
Stock Options. ISOs and NSOs are granted under stock option agreements adopted by the plan administrator. The plan administrator determines the exercise price for stock options, within the terms and conditions of the 2018 Plan, provided that the exercise price of a stock option generally cannot be less than 100% of the fair market value of our common stock on the date of grant. Options granted under the 2018 Plan vest at the rate specified in the stock option agreement as determined by the plan administrator.
The plan administrator determines the term of stock options granted under the 2018 Plan, up to a maximum of 10 years. If an optionholder’s service relationship with us or any of our affiliates ceases for any reason other than disability, death or cause, the optionholder may generally exercise any vested options for a period of three months following the cessation of service. This period may be extended in the event that exercise of the option is prohibited by applicable securities laws or if the sale of common stock received upon exercise would violate our insider trading policy. If an optionholder’s service relationship with us or any of our affiliates ceases due to death, or an optionholder dies within a certain period following cessation of service, the optionholder or a beneficiary may generally exercise any vested options for a period of 18 months following the date of death. If an optionholder’s service relationship with us or any of our affiliates ceases due to disability, the optionholder may generally exercise any vested options for a period of 12 months following the cessation of service.
In the event of a termination for cause, options generally terminate upon the termination date. In no event may an option be exercised beyond the expiration of its term.
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Acceptable consideration for the purchase of common stock issued upon the exercise of a stock option will be determined by the plan administrator and may include (1) cash, check, bank draft or money order, (2) a broker-assisted cashless exercise, (3) the tender of shares of our common stock previously owned by the optionholder, (4) a net exercise of the option if it is an NSO, (5) a deferred payment arrangement or (6) other legal consideration approved by the plan administrator.
Unless the plan administrator provides otherwise, options generally are not transferable except by will or the laws of descent and distribution. Subject to approval of the plan administrator or a duly authorized officer in each case, (1) an option may be transferred pursuant to a domestic relations order, official marital settlement agreement, or other divorce or separation instrument and (2) an optionholder may designate a beneficiary who may exercise the option following the optionholder’s death.
Tax Limitations on ISOs. The aggregate fair market value, determined at the time of grant, of our common stock with respect to ISOs that are exercisable for the first time by an optionholder during any calendar year under all of our stock plans may not exceed $100,000. Options or portions thereof that exceed such limit will generally be treated as NSOs. No ISO may be granted to any person who, at the time of the grant, owns or is deemed to own stock possessing more than 10% of our total combined voting power or that of any of our affiliates unless (1) the option exercise price is at least 110% of the fair market value of the stock subject to the option on the date of grant and (2) the term of the ISO does not exceed five years from the date of grant.
Changes to Capital Structure. In the event there is a specified type of change in our capital structure, such as a stock split, reverse stock split, or recapitalization, appropriate and proportionate adjustments will be made to (1) the class and maximum number of shares reserved for issuance under the 2018 Plan, (2) the class and maximum number of shares that may be issued on the exercise of ISOs and (3) the class and number of shares and exercise price, strike price, or purchase price, if applicable, of all outstanding stock awards.
Transactions. The 2018 Plan provides that in the event of a corporate transaction or a change in control, each outstanding stock award shall be treated as the plan administrator determines, including, without limitation, that each stock award may be assumed, continued or a similar award substituted for such stock award by the surviving or acquiring corporation (or its parent). Notwithstanding the foregoing, in the event of a change in control in which the surviving or acquiring corporation (or its parent) does not assume, continue or substitute for such outstanding stock awards, then the vesting and exercisability of such stock awards shall accelerate in full. In addition, the plan administrator shall notify the participant that the stock award shall be fully vested and exercisable for a specified period of time, and any such award shall terminate upon the expiration of such period for no consideration, unless otherwise determined by the plan administrator.
The plan administrator is not obligated to treat all stock awards similarly in the transaction.
In addition, a stock award under the 2018 Plan may be subject to additional acceleration of vesting and exercisability upon or after a change in control as may be provided in the award agreement or other written agreement between us and the participant, but in the absence of such provision, no such acceleration will automatically occur, except as described above.
Under the 2018 Plan, a corporate transaction is generally the consummation of (1) a sale or other disposition of all or substantially all of our assets, (2) the sale or other disposition of more than 50% of our outstanding securities, (3) a merger, consolidation or similar transaction where we do not survive the transaction or (4) a merger, consolidation or similar transaction where we do survive the transaction but the shares of our common stock outstanding immediately before such transaction are converted or exchanged into other property by virtue of the transaction.
Under the 2018 Plan, a change in control is generally (1) the acquisition by any person or company of more than 50% of the combined voting power of our then outstanding stock, (2) a consummated merger, consolidation or similar transaction in which our stockholders immediately before the transaction do not own, directly or indirectly, more than 50% of the combined voting power of the surviving entity (or the parent of the surviving entity) in substantially the same proportions as their ownership immediately prior to such transaction, (3) a complete dissolution or liquidation of us, (4) a consummated sale, lease, exclusive license or other disposition of all or substantially all of our assets other than to an entity more than 50% of the combined voting power of which is owned by our stockholders in substantially the same proportions as their ownership of our outstanding voting securities immediately prior to such transaction or (5) when a majority of our board of directors becomes comprised of individuals who were not serving on our board of directors on the date the 2018 Plan was adopted, or the incumbent board, or whose nomination, appointment or election was not approved by a majority of the incumbent board still in office.
Plan Amendment or Termination. Our board of directors has the authority to amend, suspend, or terminate the 2018 Plan, provided that such action does not impair the existing rights of any participant without such participant’s written consent. Certain material amendments also require the approval of our stockholders. Unless terminated sooner, the 2018 Plan will automatically terminate on August 14, 2028. No stock awards may be granted under the 2018 Plan while it is suspended or after it is terminated.
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2008 Stock Plan
Our board of directors adopted the 2008 Plan in September 2008 and our stockholders approved the 2008 Plan in September 2008. The 2008 Plan was further amended by our board of directors and stockholders, most recently in May 2017. No further awards were granted upon the effective date of the 2018 Plan.
Stock Awards. The 2008 Plan provides for the grant of ISOs within the meaning of Section 422 of the Code to employees, including employees of any parent or subsidiary, and for the grant of NSOs and restricted stock awards to employees, directors and consultants, including employees and consultants of our affiliates.
Authorized Shares. Shares are no longer available for the grant of stock awards under the 2008 Plan. However, if a stock award granted under the 2008 Plan expires or terminates, is forfeited or otherwise returns to us or is reacquired, withheld or not issued to satisfy a tax withholding obligation or to satisfy the exercise or purchase price of a stock award, the shares of our common stock not acquired pursuant to the stock award again will become available for subsequent issuance under the 2019 Plan.
Plan Administration. Our board of directors, or a committee appointed by our board of directors, has the authority to administer the 2008 Plan and is referred to as the “plan administrator” herein. Under the 2008 Plan, the plan administrator has the authority to determine award recipients, dates of grant, the numbers and types of stock awards to be granted, the applicable fair market value and the provisions of each stock award, including the period of their exercisability and the vesting schedule applicable to a stock award.
Under the 2008 Plan, the plan administrator also generally has the authority to institute an exchange program under which (i) outstanding options are surrendered or cancelled in exchange for options and/or cash and/or (ii) the exercise price of an outstanding option is reduced.
Stock Options. ISOs and NSOs are granted under stock option agreements adopted by the plan administrator. The plan administrator determines the exercise price for stock options, within the terms and conditions of the 2008 Plan, provided that the exercise price of a stock option generally cannot be less than 100% of the fair market value of our common stock on the date of grant. Options granted under the 2008 Plan vest at the rate specified in the stock option agreement as determined by the plan administrator.
The plan administrator determines the term of stock options granted under the 2008 Plan, up to a maximum of ten years. If an optionholder’s service relationship with us or any of our affiliates ceases for any reason other than disability or death, the optionholder may generally exercise any vested options for a period of three months following the cessation of service. If an optionholder’s service relationship with us or any of our affiliates ceases due to death, the optionholder or a beneficiary may generally exercise any vested options for a period of 12 months following the date of death. If an optionholder’s service relationship with us or any of our affiliates ceases due to disability, the optionholder may generally exercise any vested options for a period of 12 months following the cessation of service. In no event may an option be exercised beyond the expiration of its term.
Acceptable consideration for the purchase of common stock issued upon the exercise of a stock option will be determined by the plan administrator and may include (1) cash, (2) check, (3) promissory note, (4) delivery of other shares, (5) a cashless exercise program, (6) such other consideration permitted by applicable laws or (7) any combination of the foregoing.
Unless the plan administrator provides otherwise, options generally are not transferable except by will or the laws of descent and distribution. Subject to approval of the plan administrator, an optionholder may designate a beneficiary who may exercise the option following the optionholder’s death.
Tax Limitations on ISOs. The aggregate fair market value, determined at the time of grant, of our common stock with respect to ISOs that are exercisable for the first time by an optionholder during any calendar year under all of our stock plans may not exceed $100,000. Options or portions thereof that exceed such limit will generally be treated as NSOs. No ISO may be granted to any person who, at the time of the grant, owns or is deemed to own stock possessing more than 10% of our total combined voting power or that of any of our affiliates unless (1) the option exercise price is at least 110% of the fair market value of the stock subject to the option on the date of grant and (2) the term of the ISO does not exceed five years from the date of grant.
Changes to Capital Structure. In the event there is a specified type of change in our capital structure, such as a stock split, reverse stock split, or recapitalization, adjustments will be made to the number and class of shares that may be delivered under the 2008 Plan and/or the number, class, and price of shares covered by each outstanding award.
Transactions. The 2008 Plan provides that in the event of a merger or a change in control, each outstanding stock award shall be treated as the plan administrator determines, including, without limitation, that each stock award may be assumed or a similar award substituted for such stock award by the successor corporation (or its parent). Notwithstanding the foregoing, in the event of a change in control in which the successor corporation (or its parent) does not assume or substitute for such outstanding stock awards, then the vesting and exercisability of such stock awards shall accelerate in full. In addition, the plan administrator shall notify the participant that the stock award shall be fully vested and exercisable for a specified period of time, and any such award shall terminate upon the
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expiration of such period for no consideration, unless otherwise determined by the plan administrator. The plan administrator is not obligated to treat all stock awards similarly in the transaction.
Under the 2008 Plan, a change in control generally means the occurrence of any of the following: (1) the acquisition by any person or group of more than 50% of the total voting power of our stock; (2) a majority of members of the board of directors is replaced during any 12 month period by directors whose appointment or election is not endorsed by a majority of the members of the board of directors prior to the date of the appointment or election; or (3) any person acquires (or has acquired during the 12 month period ending on the date of the most recent acquisition by such person or persons) assets from us that have a total gross fair market value equal to or more than 50% of the total gross fair market value of all of our assets immediately prior to such acquisition or acquisitions.
2019 Employee Stock Purchase Plan
Our board of directors adopted, and our stockholders approved, the ESPP in July 2019. The ESPP became effective in July 2019 in connection with the IPO. The purpose of the ESPP is to secure the services of new employees, to retain the services of existing employees, and to provide incentives for such individuals to exert maximum efforts toward our success and that of our affiliates. The ESPP is intended to qualify as an “employee stock purchase plan” within the meaning of Section 423 of the Code for U.S. employees.
Share Reserve. The ESPP authorizes the issuance of 411,935 shares of our common stock under purchase rights granted to our employees or to employees of any of our designated affiliates. The number of shares of our common stock reserved for issuance will automatically increase on January 1 of each calendar year, beginning on January 1, 2020 through January 1, 2029, by the lesser of (1) 1% of the total number of shares of our common stock outstanding on the last day of the calendar year before the date of the automatic increase and (2) 411,935 shares; provided that before the date of any such increase, our board of directors may determine that such increase will be less than the amount set forth in clauses (1) and (2). To date, pursuant to this automatic increase provision, an additional 673,218 shares have been authorized for future issuance under the ESPP.
Administration. Our board of directors, or a committee of our board of directors, will administer the ESPP. The ESPP is implemented through a series of offerings under which eligible employees are granted purchase rights to purchase shares of our common stock on specified dates during such offerings. Under the ESPP, we may specify offerings with durations of not more than 27 months, and may specify shorter purchase periods within each offering. Each offering will have one or more purchase dates on which shares of our common stock will be purchased for employees participating in the offering. An offering under the ESPP may be terminated under certain circumstances.
Payroll Deductions. Generally, all regular employees, including executive officers, employed by us or by any of our designated affiliates, may participate in the ESPP and may contribute, normally through payroll deductions, up to 15% of their earnings (as defined in the ESPP) for the purchase of our common stock under the ESPP. Unless otherwise determined by our board of directors, common stock will be purchased for the accounts of employees participating in the ESPP at a price per share that is at least the lesser of (1) 85% of the fair market value of a share of our common stock on the first date of an offering or (2) 85% of the fair market value of a share of our common stock on the date of purchase.
Limitations. Employees may have to satisfy one or more of the following service requirements before participating in the ESPP, as determined by our board of directors, including: (1) being customarily employed for more than 20 hours per week, (2) being customarily employed for more than five months per calendar year or (3) continuous employment with us or one of our affiliates for a period of time (not to exceed two years). No employee may purchase shares under the ESPP at a rate in excess of $25,000 worth of our common stock based on the fair market value per share of our common stock at the beginning of an offering for each calendar year such a purchase right is outstanding. Finally, no employee will be eligible for the grant of any purchase rights under the ESPP if immediately after such rights are granted, such employee has voting power over 5% or more of our outstanding capital stock measured by vote or value under Section 424(d) of the Code.
Changes to Capital Structure. In the event that there occurs a change in our capital structure through such actions as a stock split, merger, consolidation, reorganization, recapitalization, reincorporation, stock dividend, dividend in property other than cash, large nonrecurring cash dividend, liquidating dividend, combination of shares, exchange of shares, change in corporate structure, or similar transaction, the board of directors will make appropriate adjustments to: (1) the class(es) and maximum number of shares reserved under the ESPP, (2) the class(es) and maximum number of shares by which the share reserve may increase automatically each year, (3) the class(es) and number of shares subject to and purchase price applicable to outstanding offerings and purchase rights and (4) the class(es) and number of shares that are subject to purchase limits under ongoing offerings.
Corporate Transactions. In the event of certain significant corporate transactions, any then-outstanding rights to purchase our stock under the ESPP may be assumed, continued, or substituted for by any surviving or acquiring entity (or its parent company). If the surviving or acquiring entity (or its parent company) elects not to assume, continue, or substitute for such purchase rights, then the participants’ accumulated payroll contributions will be used to purchase shares of our common stock within 10 business days before such corporate transaction, and such purchase rights will terminate immediately.
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Under the ESPP, a corporate transaction is generally the consummation of: (1) a sale or other disposition of all or substantially all of our assets; (2) the sale or other disposition of more than 50% of our outstanding securities; (3) a merger or consolidation where we do not survive the transaction; and (4) a merger or consolidation where we do survive the transaction but the shares of our common stock outstanding immediately before such transaction are converted or exchanged into other property by virtue of the transaction.
ESPP Amendment or Termination. Our board of directors has the authority to amend or terminate the ESPP, provided that except in certain circumstances such amendment or termination may not materially impair any outstanding purchase rights without the holder’s consent. We will obtain stockholder approval of any amendment to the ESPP as required by applicable law or listing requirements.

Indemnifications

RELATED PERSON TRANSACTIONS WITH RELATED PERSONSPOLICY AND INDEMNIFICATIONS

Related Person Transactions Policy and Procedures
PROCEDURES

We have adopted a written related-person transactions policy that sets forth our policies and procedures regarding the identification, review, consideration and oversight of “related-person transactions.” For purposes of our policy only, a “related-person transaction” is a transaction, arrangement or relationship (or any series of similar transactions, arrangements or relationships) in which we and any “related person” are participants involving an amount that exceeds $120,000. Transactions involving compensation for services provided to us as an employee, consultant or director are not considered related-person transactions under this policy. A related person is any executive officer, director, nominee to become a director or a holder of more than five percent of our common stock, including any of their immediate family members and affiliates, including entities owned or controlled by such persons.

Under the policy, where a transaction has been identified as a related-person transaction, management must present information regarding the proposed related-person transaction to our audit committee (or, where review by our Audit Committee would be inappropriate, to another independent body of our board of directors) for review. The presentation must include a description of, among other things, all of the parties thereto, the direct and indirect interests of the related persons, the purpose of the transaction, the material facts, the benefits of the transaction to us and whether any alternative transactions are available, an assessment of whether the terms are comparable to the terms available from unrelated third parties and management’s recommendation. To identify related-person transactions in advance, we rely on information supplied by our executive officers, directors and certain significant stockholders. In considering related-person transactions, our audit committee or another independent body of our board of directors takes into account the relevant available facts and circumstances including, but not limited to:


the risks, costs and benefits to us;
the impact on a director’s independence in the event the related person is a director, immediate family member of a director or an entity with which a director is affiliated;
the terms of the transaction;
the availability of other sources for comparable services or products; and
the terms available to or from, as the case may be, unrelated third parties.

the risks, costs and benefits to us;

the impact on a director’s independence in the event the related person is a director, immediate family member of a director or an entity with which a director is affiliated;

the terms of the transaction;

the availability of other sources for comparable services or products; and

the terms available to or from, as the case may be, unrelated third parties.

In the event a director has an interest in the proposed transaction, the director must recuse himself or herself from the deliberations and approval.

Certain Related Person Transactions

CERTAIN RELATED PERSON TRANSACTIONS

The following includes a summary of transactions since January 1, 20202021 to which we have been a party, in which the amount involved in the transaction exceeded the lesser of $120,000 or 1% of the average of the Company’s total assets at year-end for the last two completed fiscal years, and in which any of our directors, executive officers or beneficial owners of more than 5% of our capital stock or any member of the immediate family of any of the foregoing persons had or will have a direct or indirect material interest, other than equity and other compensation, termination, change in control and other arrangements, which are described under “Executive Compensation””Compensation Discussion and Analysis” and “Director Compensation.”


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Employment of Immediate Family Members of Executive Officers

Three of Derek J. Maetzold’s children, John Maetzold, Emily Kirk and Peter Maetzold and his brother-in-law, Greg Holzapfel are employed by the Company in non-officer positions. John Maetzold is a National Sales Director, Emily Kirk is an Executive Area Manager, Peter Maetzold is a Program Manager and Greg Holzapfel is our Director of Cyber Security & Infrastructure. For the

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2023 Proxy Statement

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Transactions with Related Persons and Indemnifications

year ended December 31, 2022, John Maetzold, Emily Kirk, Peter Maetzold and Greg Holzapfel received aggregate compensation of $1,030,418, $412,178, $297,858 and $516,123, respectively, of which $622,609, $164,951, $72,294 and $234,117, respectively, represents the aggregate grant date fair value of stock awards. For the year ended December 31, 2021, John Maetzold, Emily Kirk, Peter Maetzold and Greg Holzapfel received aggregate compensation of $982,604, $688,109, $597,814 and $389,313, respectively, of which $628,068, $460,884, $406,857 and $226,844, respectively, represents the aggregate grant date fair value of option awards and stock awards. For the year ended December 31, 2020, John Maetzold, Emily Kirk and Peter Maetzold received aggregate compensation of $611,097, $312,241 and $263,743, respectively, of which $340,790, $116,572 and $116,572, respectively, represents the aggregate grant date fair value of option awards and stock awards. Greg Holzapfel was hired during 2021.

Included in the aggregate grant date fair value of option awards and stock awards for the year ended December 31, 2021 for John Maetzold, Emily Kirk and Peter Maetzold are $453,062, $343,376 and $332,341, respectively, of compensation related to RSUs granted on October 1, 2021 as approved by the Audit Committee, at the recommendation of our Compensation Committee, which we determined to be outside the ordinary course of business. Under the Code, those owning more than a specified percentage of a company’s stock are not eligible to receive certain preferential tax benefits that are afforded to qualifying stock compensation arrangements. In determining eligibility under the Code, when calculating the number of shares of common stock owned, an individual must attribute all shares owned by specified family members. Because of the stock ownership of Derek J. Maetzold and this attribution requirement, his three children have not been eligible to participate in the ESPP and, at times, have not qualified to receive stock option grants on terms as favorable as those received by other similar employees. Our Compensation Committee recommended, and our Audit Committee approved, a one-time grant with immediate vesting of RSUs designed to compensate the three children for these differences.

Tobin W. Juvenal’s son, Ryan Juvenal is employed by the Company in a non-officer position. Ryan Juvenal is a Regional Business Director. For the years ended December 31, 2021,2022, and 2020,2021, Ryan Juvenal received aggregate compensation of $580,126$481,311 and $424,766,$580,126, respectively, of which $278,531$149,990 and $116,572,$278,531, respectively, represents the aggregate grant date fair value of option awards and stock awards.

Kristen M. Oelschlager’s two children, Allysa Topel, and Shelby Oelschlager, and son-in-law, Joshua Albers are employed by the Company in non-officer positions. Allysa Topel is our Manager of Clinical Services, Shelby Oelschlager is a Clinical Research Associate and Joshua Albers is our Director of Software & Application Development. For the year ended December 31, 2022, Allysa Topel, Shelby Oelschlager and Joshua Albers received aggregate compensation of $208,065, $153,007 and $498,247, respectively, of which $49,707, $32,297 and $234,117, respectively, represents the aggregate grant date fair value of stock awards. For the year ended December 31, 2021, Allysa Topel, Shelby Oelschlager and Joshua Albers received aggregate compensation of $215,432, $168,309 and $331,785, respectively, of which $74,516, $94,718 and $117,508, respectively, represents the aggregate grant date fair value of option awards and stock awards. For the year ended December 31, 2020, Allysa Topel and Joshua Albers received aggregate compensation of $337,110 and $344,038, respectively, of which $208,518 and $183,642, respectively, represents the aggregate grant date fair value of option awards and stock awards. Shelby Oelschlager was hired during 2021.

These amounts of compensation were calculated using the same methodology as used in the Summary Compensation Table in the section titled “Executive Compensation.” Each of the foregoing transactions were reviewed and approved by our Audit Committee in accordance with Rule 5630(a) of the Nasdaq listing rules.

Stock Options and RSUs Granted to Executive Officers and Directors
We have granted stock options and RSUs to our executive officers and directors, as more fully described in the sections titled “Executive Compensation” and “Director Compensation.”

AltheaDx Merger Agreement

On April 4,26, 2022, we entered into an Agreement and Plancompleted the acquisition of Merger (the “Merger Agreement”) to acquire100% of the equity interests in AltheaDx, Inc. (“AltheaDx”), a commercial-stage molecular diagnostics company specializing in the field of pharmacogenomics (“PGx”).

Upon the closing, pursuant to an Agreement and Plan of the merger, which is expected to occur in the second quarter ofMerger dated April 4, 2022 subject to the satisfaction of customary closing conditions, Castle will pay $65.0(the “Merger Agreement”).

We paid $47.6 million in initial consideration to AltheaDx security holders, consisting of $32.5$30.5 million in cash and $32.5 million in Castle763,887 shares of our common stock, subject to a limit onwhich were valued at $17.1 million using the numberclosing price of shares of Castleour common stock issuable as initial consideration equal to 4.99%on April 26, 2022 of our outstanding common stock, measured on the date of the potential consummation of the merger.$22.40 per share. Further, up to an additional $75.0 million in cash and Castle common stock will bewas initially payable in connection with the achievement of certain milestones based on 2022, 2023 and 2024 performance and expanded Medicare coverage for IDgenetix, AltheaDx’s PGx test for depression and anxiety.

Castle’s entry into Currently, up to an additional $57.5 million of milestone payments remain payable. Under the Merger Agreement, was approved bythe maximum number of Castle shares issuable to former AltheaDx securityholders may not exceed 1,271,718 shares. Therefore, taking into consideration the number of shares already issued at closing, a maximum of 507,831 additional shares of our board of directors based upon the unanimous recommendation of a special transaction committee (the “AltheaDx Transaction Committee”) formed on October 4, 2021 and consisting of Ms. Aspinall, Ms. Caple, Mr. Cole, Ms. Goldberg, Mr. Harrison and Ms. Olson, each of whom are independent and disinterested directors without any financial interest in AltheaDx or any conflict of interestcommon stock remain issuable with respect to the merger. Our board of directors delegated the authority
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to the AltheaDx Transaction Committee to evaluate the merger, oversee the due diligence process and negotiations of the Merger Agreement and ultimately recommend to our board of directors Castle’s entry into the Merger Agreement.
these milestone payments.

Derek J. Maetzold, our President and Chief Executive Officer,CEO and a member of our board of directors, and Daniel M. Bradbury, the ChairpersonChair of our board of directors, each serveserved on the board of directors of AltheaDx.AltheaDx until the time of the closing of the transaction. Further, each of the following individuals iswas a direct or indirect beneficial owner of AltheaDx securities and will be eligible to receivereceived the following approximate aggregate amounts of consideration if the Merger is consummated:initial consideration: Mr. Bradbury ($4,940,471)3,682,959); Mr. Maetzold ($1,807,109)1,347,172); Thomas Sullivan ($271,066)202,089), John Maetzold ($72,282)53,914) and Peter Maetzold ($45,176)33,693), immediate family members of Mr. Maetzold; Frank Stokes, the Company’s Chief Financial Officer ($90,354)67,388); Tobin W. Juvenal, the Company’s Chief Commercial Officer ($180,710)134,739); Kristen Oelschlager, the Company’s Chief Operating Officer ($542,133)404,178); and Joshua Albers ($45,176)33,693) and Allysa Topel ($18,069)13,492), immediate family members of Ms. Oelschlager. TheIn calculating the foregoing amounts, are based on an estimate of the cash, indebtedness, transaction expenses and working capital purchase price adjustments as of the date of the Merger Agreement, andCastle shares issued to these individuals were valued using the closing price of the Merger, which is subject to the satisfaction or waiverour common stock on April 26, 2022 of customary conditions, and may not represent the actual amounts ultimately received by the foregoing individuals as consideration in the Merger Agreement.$22.40 per share. Assuming that all milestone payments under

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Transactions with Related Persons and Indemnifications

the Merger Agreement arewere to be paid at the maximum level, each of the individuals willwould receive the following approximate amounts of additional consideration: Mr. Bradbury ($5,716,868)5,720,608), Mr. Maetzold ($2,534,936)2,525,021), Thomas Sullivan ($369,877)368,763), John Maetzold ($98,631)98,334), Peter Maetzold ($61,644)61,458), Frank Stokes ($123,291)122,919), Tobin W. Juvenal ($246,584)245,841), Kristen Oelschlager ($739,755)737,526), Joshua Albers ($61,644)61,458) and Allysa Topel ($24,656)24,582).

To date, however, none of this additional consideration has been paid or become payable.

Indemnification Agreements

We have entered, and intend to continue to enter, into separate indemnification agreements with our directors and executive officers, in addition to the indemnification provided for in our amended and restated bylaws. These agreements, among other things, require us to indemnify our directors and executive officers for certain expenses, including attorneys’ fees, judgments, fines and settlement amounts incurred by a director or executive officer in any action or proceeding arising out of their services as one of our directors or executive officers or as a director or executive officer of any other company or enterprise to which the person provides services at our request. We believe that these bylaw provisions and indemnification agreements are necessary to attract and retain qualified persons as directors and officers.

The limitation of liability and indemnification provisions in our amended and restated certificate of incorporation and our amended and restated bylaws may discourage stockholders from bringing a lawsuit against directors for breach of their fiduciary duties. They may also reduce the likelihood of derivative litigation against directors and officers, even though an action, if successful, might benefit us and our stockholders. A stockholder’s investment may decline in value to the extent we pay the costs of settlement and damage awards against directors and officers pursuant to these indemnification provisions.

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HOUSEHOLDING OF PROXY MATERIALS

Householding of Proxy Materials

The SEC has adopted rules that permit companies and intermediaries (e.g., brokers) to satisfy the delivery requirements for meeting materials with respect to two or more stockholders sharing the same address by delivering a single set of meeting materials addressed to those stockholders. This process, which is commonly referred to as “householding,” potentially means extra convenience for stockholders and cost savings for companies.

For this meeting, a number of brokers with account holders who are Castle stockholders will be “householding” the Company’s proxy materials. A single set of meeting materials will be delivered to multiple stockholders sharing an address unless contrary instructions have been received from the affected stockholders. Once you have received notice from your broker that they will be “householding” communications to your address, “householding” will continue until you are notified otherwise or until you revoke your consent. If, at any time, you no longer wish to participate in “householding” and would prefer to receive a separate Notice of Internet Availability Proxy Materials, please notify your broker or Castle. Direct your written request to Castle Biosciences, Inc., 505 S. Friendswood Drive, Suite 401, Friendswood, Texas 77546, Attn: Corporate Secretary or call us at (866) 788-9007. If you are receiving more than one copy of the proxy materials at a single address and would like to participate in householding, please contact the bank, broker or other organization that holds your shares to request information about eliminating duplicate mailings.

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ANNUAL REPORT ON FORM 10-K
Our

Annual Report on Form 10-K for the fiscal year ended December 31, 2021,

Our reports on Forms 10-K, 10-Q, 8-K and this Proxy Statementall amendments to those reports are available free ofwithout charge on our website at www.CastleBiosciences.com on the “Investors” page by selecting “Financials and Filings” and then “SEC Filings.Filings,Additionally, these materialsas soon as reasonably practicable after they are available freeelectronically filed with, or furnished to, the SEC. You may request a copy of charge on the SEC’s website at www.sec.gov. We will furnish without chargeour SEC filings, including a copy of the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2021,2022, as well as the foregoing corporate documents, at no cost to any stockholder upon written request. Written requests should be sentyou, by writing to Castle Biosciences, Inc., 505 S. Friendswood Drive, Suite 401, Friendswood, Texas 77546, Attn: Investor Relations.

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Table

Questions and Answers about these Proxy Materials and Voting

Why did I receive a notice regarding the availability of Contents


OTHER MATTERS
The proxy materials on the internet?

Pursuant to rules adopted by the SEC, we have elected to provide access to our proxy materials over the internet. Accordingly, we have sent you a Notice of Internet Availability of Proxy Materials (the “Notice”) because the board of directors knowsof the Company is soliciting your proxy to vote at Castle’s 2023 annual meeting of stockholders (including any adjournments, continuations or postponements thereof). All stockholders will have the ability to access the proxy materials on the website referred to in the Notice or request to receive a printed set of the proxy materials. Instructions on how to access the proxy materials over the internet or to request a printed set of proxy materials may be found in the Notice.

We intend to mail the Notice on or about April 12, 2023, to all stockholders of record as of the close of business on April 4, 2023, the record date for the Annual Meeting, entitled to vote at the Annual Meeting.

How do I attend the Annual Meeting?

The meeting will be held on Thursday, May 25, 2023, at 10:00 a.m. Eastern Daylight Time at the Omni William Penn Hotel, 530 William Penn Place, Pittsburgh, Pennsylvania 15219. Directions to the Annual Meeting may be found at www.CastleBiosciences.com. The inclusion of our website address here and elsewhere in this Proxy Statement does not incorporate by reference into this Proxy Statement the information on or accessible through our website. Information on how to vote in person at the Annual Meeting is discussed below.

Who can vote at the Annual Meeting?

Only stockholders of record as of the close of business on April 4, 2023, the record date for the Annual Meeting, will be entitled to vote at the Annual Meeting. On this record date, there were 26,686,376 shares of common stock outstanding and entitled to vote.

Stockholder of Record: Shares Registered in Your Name

If, as of the close of business on April 4, 2023, your shares were registered directly in your name with Castle’s transfer agent, Broadridge Corporate Issuer Solutions, Inc., then you are a stockholder of record. As a stockholder of record, you may vote in person at the Annual Meeting or vote by proxy. Whether or not you plan to attend the Annual Meeting, we urge you to fill out and return the proxy card that you may request or that we may elect to deliver at a later time, or vote by proxy over the telephone or on the internet as instructed below to ensure your vote is counted.

Beneficial Owner: Shares Registered in the Name of a Broker, Bank or other Agent

If, as of the close of business on April 4, 2023, your shares were held, not in your name, but rather in an account at a brokerage firm, bank or other similar organization, then you are the beneficial owner of shares held in “street name” and the Notice is being forwarded to you by that organization. The organization holding your account is considered to be the stockholder of record for purposes of voting at the Annual Meeting. As a beneficial owner, you have the right to direct your broker, bank or other agent regarding how to vote the shares in your account. You are also invited to attend the Annual Meeting. However, since you are not the stockholder of record, you may not vote your shares at the Annual Meeting unless you request and obtain a valid proxy from your broker, bank or other agent.

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Questions and Answers about these Proxy Materials and Voting

On what matters am I voting?

There are three matters scheduled for a vote:

Proposal 1: To elect the three Class I directors named herein to hold office until the 2026 annual meeting of stockholders;

Proposal 2: To ratify the selection of KPMG LLP by the Audit Committee of our board of directors as our independent registered public accounting firm for the fiscal year ending December 31, 2023;

Proposal 3: To approve, on an advisory basis, the compensation of our NEOs, as disclosed in this Proxy Statement (commonly known as a Say-on-Pay proposal); and

What are the voting recommendations of Castle’s board of directors?

Our board of directors recommends that you vote:

“FOR” the election of the three Class I directors named herein to hold office until the 2026 annual meeting of stockholders (Proposal 1);

“FOR” the ratification of the selection of KPMG LLP by the Audit Committee of our board of directors as our independent registered public accounting firm for the fiscal year ending December 31, 2023 (Proposal 2); and

“FOR” the approval, on an advisory basis, of the compensation of our NEOs, as disclosed in this Proxy Statement (Proposal 3);

What if another matter is properly brought before the Annual Meeting?

We know of no other matters that will be presented for consideration at the Annual Meeting. If any other matters properly come before the Annual Meeting, it is the intention of the persons named in the accompanying proxy to vote such proxy in accordance with the recommendation of our management on such matters, including any matters dealing with the conduct of the Annual Meeting.

How do I vote?

You may either vote “FOR” all the nominees to the board of directors or you may “WITHHOLD” your vote for any nominee you specify. For each of Proposal 2 and Proposal 3, you may vote “FOR” or “AGAINST” or abstain from voting.

The procedures for voting are fairly simple:

Stockholder of Record: Shares Registered in Your Name

If you are a stockholder of record, you may vote in person at the Annual Meeting, vote by proxy over the telephone, vote by proxy through the internet or vote by proxy using a proxy card that you may request or that we may elect to deliver at a later time. Whether or not you plan to attend the Annual Meeting, we urge you to vote by proxy to ensure your vote is counted. You may still attend the Annual Meeting even if you have already voted by proxy. In such case and if you vote at the Annual Meeting, your previously submitted proxy will be disregarded.

To vote in person, attend the Annual Meeting and we will give you a ballot when you arrive.

To vote using the proxy card, simply complete, sign and date the proxy card that may be delivered and return it promptly in the envelope provided. If you return your signed proxy card to us before the Annual Meeting, we will vote your shares as you direct.

To vote over the telephone, dial toll-free 1-800-690-6903 using a touch-tone phone and follow the recorded instructions. You will be asked to provide the company number and 16-Digit Control Number from the Notice. Your telephone vote must be received by 11:59 p.m. Eastern Daylight Time on May 24, 2023, to be counted.

To vote through the internet, go to www.proxyvote.com to complete an electronic proxy. You will be asked to provide the company number and 16-Digit Control Number from the Notice. Your internet vote must be received by 11:59 p.m. Eastern Daylight Time on May 24, 2023, to be counted.

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Questions and Answers about these Proxy Materials and Voting

Beneficial Owner: Shares Registered in the Name of Broker or Bank

If you are a beneficial owner of shares registered in the name of your broker, bank or other agent, you should have received a Notice containing voting instructions from that organization rather than from Castle. Simply follow the voting instructions in the Notice to ensure that your vote is counted. Alternatively, you may vote by telephone or over the internet as instructed by your broker or bank. To vote in person at the Annual Meeting, you must obtain a valid proxy from your broker, bank or other agent. Follow the instructions from your broker, bank or other agent included with these proxy materials, or contact that organization to request a proxy form.

Internet proxy voting may be provided to allow you to vote your shares online, with procedures designed to ensure the authenticity and correctness of your proxy vote instructions. However, please be aware that you must bear any costs associated with your internet access, such as usage charges from internet access providers and telephone companies.

How many votes do I have?

On each matter to be voted upon, you have one vote for each share of common stock you own as of April 4, 2023.

If I am a stockholder of record and I do not vote, or if I return a proxy card or otherwise vote without giving specific voting instructions, what happens?

If you are a stockholder of record and do not vote by completing your proxy card, by telephone, through the internet or in person at the Annual Meeting, your shares will not be voted.

If you return a signed and dated proxy card or otherwise vote without marking voting selections, your shares will be voted, as applicable, “FOR” the election of the three nominees for Class I director (Proposal 1), “FOR” the ratification of the selection of KPMG LLP as our independent registered public accounting firm for the fiscal year ending December 31, 2023 (Proposal 2) and “FOR” the approval, on an advisory basis, of the compensation of our NEOs (Proposal 3). If any other matter is properly brought before the meeting,Annual Meeting, it is the intention of the persons named in the accompanying proxy to vote on suchthose matters in accordance with the recommendation of our management on such matters, including any matters dealing with the conduct of the Annual Meeting.

If I am a beneficial owner of shares held in street name and I do not provide my broker, bank or other agent with voting instructions, what happens?

If you are a beneficial owner of shares held in street name and you do not instruct your broker, bank or other agent how to vote your shares, your broker, bank or other agent may still be able to vote your shares in its discretion. In this regard, under the rules of the New York Stock Exchange (the “NYSE”), brokers, banks and other securities intermediaries that are subject to NYSE rules may use their best judgment.discretion to vote your “uninstructed” shares with respect to matters considered to be “routine” under NYSE rules, but not with respect to “non-routine” matters. In this regard, Proposals 1 and 3 are considered to be “non-routine” under NYSE rules, meaning that your broker may not vote your shares on these proposals in the absence of your voting instructions. However,Proposal 2 is considered to be a “routine” matter under NYSE rules, meaning that if you do not return voting instructions to your broker by its deadline, your shares may be voted by your broker in its discretion on Proposal 2.

If you are a beneficial owner of shares held in street name, in order to ensure your shares are voted in the way you would prefer, you must provide voting instructions to your broker, bank or other agent by the deadline provided in the materials you receive from your broker, bank or other agent.

Who is paying for this proxy solicitation?

We will pay for the entire cost of soliciting proxies. In addition to these proxy materials, our directors and employees may also solicit proxies in person, by telephone, or by other means of communication. Directors and employees will not be paid any additional compensation for soliciting proxies. We have also engaged Morrow Sodali LLC to assist in the solicitation of proxies for a fee of approximately $12,500, plus reasonable out-of-pocket expenses. We may also reimburse brokerage firms, banks and other agents for the cost of forwarding proxy materials to beneficial owners.

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Questions and Answers about these Proxy Materials and Voting

What does it mean if I receive more than one Notice?

If you receive more than one Notice, your shares may be registered in more than one name or in different accounts. Please follow the voting instructions on the Notices to ensure that all of your shares are voted.

Can I revoke or otherwise change my vote after submitting my proxy?

Stockholder of Record: Shares Registered in Your Name

Yes. You can revoke your proxy at any time before the final vote at the Annual Meeting. If you are the record holder of your shares, you may revoke your proxy in any one of the following ways:

You may submit another properly completed proxy card with a later date.

You may grant a subsequent proxy by telephone or through the internet.

You may send a timely written notice that you are revoking your proxy to Castle Biosciences, Inc., 505 S. Friendswood Drive, Suite 401, Friendswood, Texas 77546, Attn: Corporate Secretary.

You may attend the Annual Meeting and vote. Simply attending the Annual Meeting will not, by itself, revoke your proxy.

Your most current proxy card or telephone or internet proxy is the one that will be counted.

Beneficial Owner: Shares Registered in the Name of Broker or Bank

If your shares are held by your broker, bank or other agent, you should follow the instructions provided by your broker, bank or other agent.

When are stockholder proposals and director nominations due for next year’s annual meeting?

To be considered for inclusion in the Company’s proxy materials for next year’s annual meeting, your proposal must be submitted by Thursday, December 14, 2023 and you must comply with all applicable requirements of Rule 14a-8 promulgated under Exchange Act. Pursuant to the advance notice procedures set forth in our amended and restated bylaws, if you wish to submit a proposal (including a director nomination) at the meeting that is not to be included in next year’s proxy materials, your proposal must be submitted not later than the close of business on Sunday, February 25, 2024 and no earlier than the close of business on Friday, January 26, 2024; provided, however, that if next year’s annual meeting is advanced more than 30 days prior to or delayed by more than 30 days after Saturday, May 25, 2024, your proposal must be submitted not earlier than the close of business on the 120th day prior to such annual meeting and not later than the close of business on the 90th day prior to such annual meeting or the 10th day following the day on which public announcement of such meeting is first made. You are advised to review our amended and restated bylaws, which contain additional requirements about advance notice of stockholder proposals and director nominations.

In order for stockholders to give timely notice of director nominations at next year’s annual meeting for inclusion on a universal proxy card under Rule 14a-19 of the Exchange Act, notice must be submitted by the same deadline as described above under the advance notice procedures set forth in our amended and restated bylaws and must also include the information in the notice required by our Bylaws and by Rule 14a-19(b)(2) and Rule 14a-19(b)(3) of the Exchange Act.

You should also review our amended and restated bylaws, which contain additional requirements about advance notice of and procedures for director nominations and stockholder proposals. All nominations and proposals must be submitted in writing to our Corporate Secretary at our principal executive offices at 505 S. Friendswood Drive, Suite 401, Friendswood, Texas 77546.

How are votes counted?

Votes will be counted by the inspector of election appointed for the Annual Meeting. Abstentions will have no effect on Proposal 1. Abstentions will be counted towards the vote total for Proposals 2 and 3 and will have the same effect as “AGAINST” votes. Broker non-votes will be counted towards the presence of a quorum but will not be counted towards the vote total for any proposal.

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Questions and Answers about these Proxy Materials and Voting

What are “broker non-votes”?

When a beneficial owner of shares held in “street name” does not give instructions to the brokerage firm, bank, dealer or other agent holding the shares as to how to vote on matters deemed to be non-routine under applicable NYSE rules, the broker or nominee cannot vote the shares. These unvoted shares are counted as “broker non-votes.”

As a reminder, if you are a beneficial owner of shares held in street name, in order to ensure your shares are voted in the way you would prefer, you must provide voting instructions to your broker, bank or other agent by the deadline provided in the materials you receive from your broker, bank or other agent.

How many votes are needed to approve each proposal?

The following table summarizes the minimum vote needed to approve each proposal and the effect of abstentions and broker non-votes:

Proposal
Number

Proposal DescriptionVote Required for ApprovalEffect of
Abstentions

Effect of
Broker Non-

Votes

1

Election of DirectorsNominees receiving the most “FOR” votes from the holders of a majority of shares present or represented by proxy and entitled to vote on the matter; “WITHHOLD” votes will have no effectNot
Applicable
No effect

2

Ratification of the selection of KPMG LLP as the Company’s independent registered public accounting firm for the fiscal year ending December 31, 2023“FOR” votes from the holders of a majority of shares present or represented by proxy and entitled to vote on the matterAgainstNot applicable(1)

3

Advisory approval of the compensation of our NEOs“FOR” votes from the holders of a majority of shares present or represented by proxy and entitled to vote on the matterAgainstNo effect

(1)

This proposal is considered to be a “routine” matter under applicable NYSE rules. Accordingly, if you hold your shares in street name and do not provide voting instructions to your broker, bank or other agent that holds your shares, your broker, bank or other agent has discretionary authority under NYSE rules to vote your shares on this proposal.

What is the quorum requirement?

A quorum of stockholders is necessary to hold a valid annual meeting. A quorum will be present if stockholders holding a majority of the outstanding shares entitled to vote are present in person at the Annual Meeting or represented by proxy. On April 4, 2023, the record date for the Annual Meeting, there were 26,686,376 shares outstanding and entitled to vote. Thus, the holders of 13,343,189 shares must be present in person or represented by proxy at the Annual Meeting to have a quorum.

Your shares will be counted towards the quorum only if you submit a valid proxy (or one is submitted on your behalf by your broker, bank or other agent) or if you vote at the Annual Meeting. Abstentions will be counted towards the quorum requirement. If there is no quorum, the chair of the Annual Meeting or the holders of a majority of shares present at the meeting in person or represented by proxy may adjourn the meeting to another date.

How can I find out the results of the voting at the Annual Meeting?

Preliminary voting results will be announced at the Annual Meeting. In addition, final voting results will be published in a Current Report on Form 8-K (“Form 8-K”) that we expect to file with the SEC within four business days after the Annual Meeting. If final voting results are not available to us in time to file a Form 8-K within four business days after the Annual Meeting, we intend to file a Form 8-K to publish preliminary results and, within four business days after the final results are known to us, file an additional Form 8-K to publish the final results.

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Other Matters

We know of no other matters that will be presented for consideration at the Annual Meeting. If any other matters properly come before the Annual Meeting, it is the intention of the persons named in the accompanying proxy to vote such proxy in accordance with the recommendation of our management on such matters, including any matters dealing with the conduct of the Annual Meeting.

By Order of the Board of Directors,
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Derek J. Maetzold
President and Chief Executive Officer

April 21, 2022


4212, 2023

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Signature [PLEASE SIGN WITHIN BOX] Date Signature (Joint Owners) Date TO VOTE, MARK BLOCKS BELOW IN BLUE OR BLACK INK AS FOLLOWS: KEEP THIS PORTION FOR YOUR RECORDS DETACH AND RETURN THIS PORTION ONLYTHIS PROXY CARD IS VALID ONLY WHEN SIGNED AND DATED. D79240-P72604 ! ! ! For All Withhold All For All Except For Against Abstain !! ! !! ! !!

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C/O BROADRIDGE P.O. BOX 1342 BRENTWOOD, NY 11717 Please indicate if you plan to attend this meeting. 2. To ratify the selection of KPMG LLP by the Audit Committee of the Board of Directors as our independent registered public accounting firm for the fiscal year ending December 31, 2022. 3. Approval of, on an advisory basis, our executive compensation. 4. Approval of, on an advisory basis, the frequency of the advisory approval of our executive compensation. Nominees: 01) Kimberlee S. Caple 02) G. Bradley Cole 03) Derek J. Maetzold 1. The election of three Class III directors to serve until the 2025 Annual Meeting of Stockholders or until their successors are duly elected and qualified. CASTLE BIOSCIENCES, INC. The Board of Directors recommends you vote FOR the following proposal: The Board of Directors recommends you vote FOR the following proposals 2 and 3: The Board of Directors recommends you vote 1 YEAR on the following proposal: NOTE: The proxies may vote in their discretion upon any other business that may properly come before the meeting or any adjournment thereof. Please sign exactly as your name(s) appear(s) hereon. When signing as attorney, executor, administrator, or other fiduciary, please give full title as such. Joint owners should each sign personally. If a corporation or partnership, please sign in full corporate or partnership name by authorized officer. This section must be completed for your Instructions to be executed. Yes No ! !!! 3 Years1 Year 2 Years Abstain Instructions: To withhold authority to vote for any individual nominee(s), mark "For All Except" and write the number(s) of the nominee(s) on the line below.SCAN TO VIEW MATERIALS & VOTE w VOTE BY INTERNET - www.proxyvote.com or scan the QR Barcode above Use the Internet to transmit your voting instructions and for electronic delivery of information up until 11:59 p.m. Eastern Time the day before the cut-off date or meeting date. Follow the instructions to obtain your records and to create an electronic voting instruction form. ELECTRONIC DELIVERY OF FUTURE PROXY MATERIALS If you would like to reduce the costs incurred by our company in mailing proxy materials, you can consent to receiving all future proxy statements, proxy cards and annual reports electronically via e-mail or the Internet. To sign up for electronic delivery, please follow the instructions above to vote using the Internet and, when prompted, indicate that you agree to receive or access proxy materials electronically in future years. VOTE BY PHONE - 1-800-690-6903 Use any touch-tone telephone to transmit your voting instructions up until 11:59 p.m. Eastern Time the day before the cut-off date or meeting date. Have your proxy card in hand when you call and then follow the instructions. VOTE BY MAIL Mark, sign and date your proxy card and return it in the postage-paid envelope we have provided or return it to Vote Processing, c/o Broadridge, 51 Mercedes Way, Edgewood, NY 11717. SCAN TO VIEW MATERIALS & VOTEw



VOTE, MARK BLOCKS BELOW IN BLUE OR BLACK INK AS FOLLOWS: V09537-P89587 KEEP THIS PORTION FOR YOUR RECORDS THIS PROXY CARD IS VALID ONLY WHEN SIGNED AND DATED. DETACH AND RETURN THIS PORTION ONLY CASTLE BIOSCIENCES, INC. For All Withhold All Except For All The Board of Directors recommends you vote FOR ALL of the following nominees: ! ! ! 1. The election of three Class I directors to serve until the 2026 Annual Meeting of Stockholders or until their successors are duly elected and qualified. Nominees: 01) Ellen Goldberg 02) Miles D. Harrison 03) Tiffany P. Olson The Board of Directors recommends you vote FOR the following proposals 2 and 3: To withhold authority to vote for any individual nominee(s), mark “For All Except” and write the number(s) of the nominee(s) on the line below. The Board of Directors recommends you vote FOR the following proposals 2 and 3: For Against Abstain 2. To ratify the selection of KPMG LLP by the Audit Committee of the Board of Directors as our independent registered public accounting firm for the fiscal ! ! ! year ending December 31, 2023. 3. To approve, on an advisory basis, the compensation of our named executive officers, as disclosed in the Proxy Statement. ! ! ! NOTE: The proxies may vote in their discretion upon any other business that may properly come before the meeting or any adjournment thereof. Yes No Please indicate if you plan to attend this meeting. ! ! Please sign exactly as your name(s) appear(s) hereon. When signing as attorney, executor, administrator, or other fiduciary, please give full title as such. Joint owners should each sign personally. If a corporation or partnership, please sign in full corporate or partnership name by authorized officer. This section must be completed for your Instructions to be executed. Signature [PLEASE SIGN WITHIN BOX] Date Signature (Joint Owners) Date


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D79241-P72604 Stockholders May 25, 2023, 10:00 a.m. (EDT) Omni William Penn Hotel 530 William Penn Place Pittsburgh, Pennsylvania 15219 Important Notice Regarding the Availability of Proxy Materials for the Annual Meeting: The Notice and Proxy Statement and Annual Report are available at www.proxyvote.com. Annual Meeting of Stockholders June 2, 2022, 11:00 a.m. (Local Time) San Luis Resort, Spa and Conference Center 5222 Seawall Boulevard, Galveston, Texas 77551V09538-P89587 Proxy – Castle Biosciences, Inc. This Proxy is Solicited on Behalf of the Board of Directors Annual Meeting of Stockholders Thursday, June 2, 2022, 11:May 25, 2023, 10:00 a.m. (Local Time)(EDT) The stockholder(s) hereby appoint(s) Derek J. Maetzold and Frank Stokes, or either of them, as proxies, each with the power to appoint his substitute, and hereby authorize(s) them to represent and to vote, as designated on the reverse side of this ballot, all of the shares of common stock of CASTLE BIOSCIENCES, INC. that the stockholder(s) is/are entitled to vote at the Annual Meeting of Stockholders to be held at 11:10:00 a.m. (Local Time)(EDT) on Thursday, June 2, 2022,May 25, 2023, at the San Luis Resort, Spa and Conference Center, 5222 Seawall Boulevard, Galveston, Texas 77551,Omni William Penn Hotel, 530 William Penn Place, Pittsburgh, Pennsylvania 15219, and any adjournment or postponement thereof.thereof (with discretionary authority under Proposal 1 to vote for a substitute nominee if any nominee is unable to serve or for good cause will not serve) and on such other matters as may properly come before said meeting. This proxy, when properly executed, will be voted in the manner directed herein. If no such direction is made, this proxy will be voted "FOR" eachin accordance with the recommendations of the director nominees listed in proposal 1, "FOR" proposal 2, "FOR" proposal 3 and for "1 YEAR" in proposal 4.Board of Directors. PLEASE MARK, SIGN, DATE AND RETURN THIS PROXY CARD PROMPTLY USING THE ENCLOSED REPLY ENVELOPE Please email your address changes or comments to: IR@castlebiosciences.com. Continued and to be signed on reverse side