NOTICE IS HEREBY GIVEN that the Annual Meeting of Stockholders (the “Annual Meeting”) of Unity Biotechnology, Inc., a Delaware corporation (the “Company”), will be held on June 24, 2021, at 9:00 a.m. local time. In light of the coronavirus/COVID-19 outbreak and governmental decrees that in-person gatherings be postponed or cancelled, and in the best interests of public health and the health and safety of our Board of Directors, employees and stockholders, we are holding a virtual-only meeting. Stockholders can attend the meeting via the internet at www.virtualshareholdermeeting.com/UBX2021 by using the 16-digit control number that appears on the accompanying Proxy Card (printed in the box and marked by the arrow) and the instructions that accompanied these proxy materials.

The Annual Meeting will be held for the following purposes:

The foregoing items of business are more fully described in the Proxy Statement accompanying this Notice of Annual Meeting of Stockholders. Only stockholders who owned common stock of the Company at the close of business on April 26, 2021 (the “Record Date”), can vote at this meeting or any adjournments that take place.

The Board of Directors recommends that you vote FOR the election of the director nominees named in Proposal No. 1 of the Proxy Statement; and FOR the ratification of the appointment of Ernst & Young LLP, as the independent registered public accounting firm, as described in Proposal No. 2 of the Proxy Statement.

YOUR VOTE IS IMPORTANT. WHETHER OR NOT YOU PLAN TO ATTEND THE VIRTUAL ANNUAL MEETING, WE ENCOURAGE YOU TO READ THE ACCOMPANYING PROXY STATEMENT AND OUR ANNUAL REPORT ON FORM 10-K FOR THE YEAR ENDED DECEMBER 31, 2020, AND SUBMIT YOUR PROXY AS SOON AS POSSIBLE USING ONE OF THE THREE CONVENIENT VOTING METHODS DESCRIBED IN THE “INFORMATION ABOUT THE PROXY PROCESS AND VOTING” SECTION IN THE PROXY STATEMENT. IF YOU RECEIVE MORE THAN ONE SET OF PROXY MATERIALS OR NOTICE OF INTERNET AVAILABILITY BECAUSE YOUR SHARES ARE REGISTERED IN DIFFERENT NAMES OR ADDRESSES, EACH PROXY SHOULD BE SIGNED AND SUBMITTED TO ENSURE THAT ALL OF YOUR SHARES WILL BE VOTED.

We have sent you this Proxy Statement and the enclosed Proxy Card because the Board of Directors (the “Board”) of Unity Biotechnology, Inc. (referred to herein as the “Company”, “Unity”, “we”, “us”, or “our”), is soliciting your proxy to vote at our 2021 Annual Meeting of Stockholders (the “Annual Meeting”) to be held on Thursday, June 24, 2021, at 9:00 a.m. local time, virtually at www.virtualshareholdermeeting.com/UBX2021. There will be no physical meeting location. The meeting will only be conducted via an audio webcast.

In addition to solicitations by mail, our directors, officers, and regular employees, without additional remuneration, may solicit proxies by telephone, e-mail, and personal interviews. We may retain outside consultants to solicit proxies on our behalf as well. All costs of solicitation of proxies will be borne by us. Brokers, custodians, and fiduciaries will be requested to forward proxy soliciting material to the owners of stock held in their names, and we will reimburse them for their reasonable out-of-pocket expenses incurred in connection with the distribution of proxy materials.

Pursuant to the rules adopted by the Securities and Exchange Commission (the “SEC”), we have elected to provide access to our Annual Meeting materials, which include this Proxy Statement and our Annual Report on Form 10-K for the year ended December 31, 2020 (the “Form 10-K”), over the internet in lieu of mailing printed copies. We will begin mailing the Notice of Internet Availability to our stockholders of record as of April 26, 2021 (the “Record Date”), for the first time on or about May 7, 2021. The Notice of Internet Availability will contain instructions on how to access and review the Annual Meeting materials and will also contain instructions on how to request a printed copy of the Annual Meeting materials. In addition, we have provided brokers, dealers, banks, voting trustees, and their nominees, at our expense, with additional copies of our proxy materials and the Form 10-K so that our record holders can supply these materials to the beneficial owners of shares of our common stock as of the Record Date. The Form 10-K is also available in the “Financial Information” section of our website at http://ir.unitybiotechnology.com/investor-relations.

The only outstanding voting securities of Unity are shares of common stock, $0.0001 par value per share (the “common stock”), of which there were 54,787,709 shares outstanding as of the Record Date (excluding any treasury shares). The holders of a majority in voting power of the shares of common stock issued and outstanding and entitled to vote, present in person or represented by proxy, are required to hold the Annual Meeting.

We have made this Proxy Statement and Proxy Card available to you on the internet or, upon your request, have delivered printed proxy materials to you, because the Board is soliciting your proxy to vote at the Annual Meeting, including at any adjournments or postponements of the Annual Meeting. You are invited to attend the Annual Meeting to vote on the proposals described in this Proxy Statement. However, you do not need to attend the Annual Meeting to vote your shares. Instead, you may simply complete, sign, and return the Proxy Card, or follow the instructions below to submit your proxy over the telephone or on the internet.

This Proxy Statement, the Notice of Internet Availability, the Notice of Annual Meeting, and accompanying Proxy Card will be first made available for access by our stockholders on or about May 7, 2021, to all stockholders of record entitled to vote at the Annual Meeting.

Only stockholders of record at the close of business on the Record Date will be entitled to vote at the Annual Meeting. At the close of business on the Record Date, there were 54,787,709 shares of common stock issued and outstanding and entitled to vote.

If, on the Record Date, your shares were registered directly in your name with the transfer agent for our common stock, Computershare Trust Company, N.A., then you are a stockholder of record. As a stockholder of record, you may vote at the virtual Annual Meeting or vote by proxy. Whether or not you plan to attend the Annual Meeting, we encourage you to fill out and return the Proxy Card or vote by proxy over the telephone or on the internet as instructed below to ensure your vote is counted.

If, on the Record Date, your shares were held in an account at a brokerage firm, bank, dealer. or other similar organization, then you are the beneficial owner of shares held in “street name” and these proxy materials are being forwarded to you by that organization. The organization holding your account is considered the stockholder of record for purposes of voting at the Annual Meeting. As a beneficial owner, you have the right to direct your broker or other agent on 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 virtual Annual Meeting unless you request and obtain a valid Proxy Card from your broker or other agent.

You are being asked to vote on two proposals:

In addition, you are entitled to vote on any other matters that are properly brought before the Annual Meeting.

Please note that by casting your vote by proxy you are authorizing the individuals listed on the Proxy Card to vote your shares in accordance with your instructions and in their discretion with respect to any other matter that properly comes before the Annual Meeting or any adjournments or postponements thereof.

The procedures for voting are as follows:

If you are a stockholder of record, you may vote at the virtual Annual Meeting. Alternatively, you may vote by proxy, by using the accompanying Proxy Card, over the internet, or by telephone. Whether or not you plan to attend the Annual Meeting, we encourage you to vote by proxy to ensure your vote is counted. Even if you have submitted a proxy before the Annual Meeting, you may still attend the virtual Annual Meeting and vote by following the instructions described below. In such case, your previously submitted proxy will be disregarded.

If you are a beneficial owner of shares registered in the name of your broker, bank, or other agent, you should have received a voting instruction card and voting instructions with these proxy materials from that organization rather than from us. Simply complete and mail the voting instruction card to ensure that your vote is counted. To vote at the virtual 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 your broker, bank, or other agent to request a proxy form.

We provide internet proxy voting 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.

Broadridge Financial Solutions, Inc. (“Broadridge”), has been engaged as our independent agent to tabulate stockholder votes, or Inspector of Election. If you are a stockholder of record, your executed Proxy Card is returned directly to Broadridge for tabulation. As noted above, if you hold your shares through a broker, your broker returns one Proxy Card to Broadridge on behalf of all its clients.

Votes will be counted by the Inspector of Election appointed for the Annual Meeting, who will separately count “For” votes for all proposals, and, with respect to Proposal 2, “Against” votes, abstentions, and broker non-votes. In addition, with respect to Proposal 1, the election of directors, the Inspector of Election will count the number of “Withheld” votes and broker non-votes received. If your shares are held by your broker as your nominee (that is, in “street name”), you will need to obtain a proxy form from the institution that holds your shares and follow the instructions included on that form regarding how to instruct your broker to vote your shares. If you do not give instructions to your broker, your broker can vote your shares with respect to “routine” items, but not with respect to “non-routine” items. See below for more information regarding: “What are ‘broker non-votes’?” and “Which ballot measures are considered ‘routine’ or ‘non-routine’?”

Broker non-votes occur when a beneficial owner of shares held in “street name” does not give instructions to the broker or nominee holding the shares as to how to vote on matters deemed “non-routine.” Generally, if shares are held in street name, the beneficial owner of the shares is entitled to give voting instructions to the broker or

nominee holding the shares. If the beneficial owner does not provide voting instructions, the broker or nominee can still vote the shares with respect to matters that are considered to be “routine,” but not with respect to “non-routine” matters. In the event that a broker, bank, custodian, nominee, or other record holder of common stock indicates on a proxy that it does not have discretionary authority to vote certain shares on a particular proposal, then those shares will be treated as broker non-votes with respect to that proposal. Accordingly, if you own shares through a nominee, such as a broker or bank, please be sure to instruct your nominee how to vote to ensure that your vote is counted on each of the proposals.

The ratification of the appointment of Ernst & Young LLP, as our independent registered public accounting firm for the year ending December 31, 2021 (Proposal 2) is considered routine under applicable rules. A broker or other nominee may generally vote on routine matters, and therefore, no broker non-votes are expected to exist in connection with Proposal 2. The election of directors (Proposal 1) is considered non-routine under applicable rules. A broker or other nominee cannot vote without instructions on non-routine matters, and therefore, there may be broker non-votes on Proposal 1.

With respect to Proposal 1, the election of directors, the three nominees receiving the highest number of “For” votes will be elected.

With respect to Proposal 2, the affirmative vote of the majority of votes cast affirmatively or negatively (excluding abstentions and broker non-votes) is required for approval. This is a routine proposal, and therefore, we do not expect any broker non-votes.

On each matter to be voted upon, you have one vote for each share of common stock you own as of the Record Date.

If we receive a signed and dated Proxy Card and the Proxy Card does not specify how your shares are to be voted, your shares will be voted as follows:

If any other matter is properly presented at the Annual Meeting, your proxy (one of the individuals named on your Proxy Card) will vote your shares in his or her discretion.

We will pay for the entire cost of soliciting proxies. In addition to these mailed proxy materials, our directors, officers, and employees may also solicit proxies in person, by telephone. or by other means of communication. Directors, officers, 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.

If you receive more than one set of materials, your shares are registered in more than one name or are registered in different accounts. In order to vote all the shares you own, you must either sign and return all of the Proxy Cards or follow the instructions for any alternative voting procedure on each of the Proxy Cards.

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 three ways:

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

The live audio webcast of the Annual Meeting will begin promptly at 9:00 a.m. local time. Online access to the audio webcast will open approximately 15 minutes prior to the start of the Annual Meeting to allow time for our stockholders to log in and test their devices’ audio system. We encourage our stockholders to access the meeting in advance of the designated start time.

To attend the Annual Meeting, stockholders will need to log-in to www.virtualshareholdermeeting.com/UBX2021 using the 16-digit control number on the proxy card or voting instruction form.

Stockholders may submit questions and vote on the day of, or during, the Annual Meeting on www.virtualshareholdermeeting.com/UBX2021. To demonstrate proof of stock ownership, you will need to enter the 16-digit control number received with your proxy card or voting instruction form to submit questions and vote at our Annual Meeting. We intend to answer questions submitted during the meeting that are pertinent to the Company and the items being brought before stockholder vote at the Annual Meeting, as time permits, and in accordance with the Rules of Conduct for the Annual Meeting. Questions and answers will be grouped by topic and substantially similar questions will be answered only once. To promote fairness, efficiently use the Company’s resources, and ensure all stockholder questions are able to be addressed, we will respond to no more than three questions from a single stockholder.

Beginning 15 minutes prior to the start of and during the virtual Annual Meeting, there will be a support team ready to assist stockholders with any technical difficulties they may have accessing or hearing the virtual meeting.

To be considered for inclusion in next year’s proxy materials, your proposal must be submitted in writing by January 7, 2022, to our Corporate Secretary at Unity Biotechnology, Inc., 285 East Grand Ave., South San Francisco, CA 94080; provided that if the date of the annual meeting is more than 30 days from June 24, 2022, the deadline is a reasonable time before we begin to print and send our proxy materials for next year’s annual meeting. Pursuant to the bylaws, in order for a stockholder to present a proposal for next year’s annual meeting, other than proposals to be included in the proxy statement as described above, or to nominate a director, you must do so between February 24, 2022, and March 26, 2022; provided that if the date of that annual meeting is more than 30 days before or more than 60 days after June 24, 2022, you must give notice not later than the 90^th day prior to the annual meeting date or, if later, the 10^th day following the day on which public disclosure of the annual meeting date is first made. You are also advised to review our bylaws, which contain additional requirements about advance notice of stockholder proposals and director nominations.

A quorum of stockholders is necessary to hold a valid meeting. A quorum will be present if the holders of a majority in voting power of the shares of common stock issued and outstanding and entitled to vote are present in person, or by remote communication, if applicable, or represented by proxy at the Annual Meeting. Shares are considered present “in person” if voted by the holder of those shares during the Annual Meeting or by proxy. On the Record Date, there were 54,787,709 shares outstanding and entitled to vote. Accordingly, 27,393,856 shares must be represented by stockholders present at the Annual Meeting or by proxy to have a quorum.

Your shares will be counted toward the quorum only if you submit a valid proxy or vote at the Annual Meeting. Abstentions and broker non-votes will be counted toward the quorum requirement. If there is no quorum, either the Chair of the Annual Meeting or a majority in voting power of the stockholders entitled to vote at the Annual Meeting, present in person, or by remote communication, if applicable, or represented by proxy, may adjourn the Annual Meeting to another time or place.

Voting results will be announced by the filing of a Current Report on Form 8-K within four business days after the Annual Meeting. If final voting results are unavailable at that time, we will file an amended Current Report on Form 8-K within four business days of the day the final results are available.

We are an “emerging growth company” as that term is used in the Jumpstart Our Business Startups Act of 2012 and, as such, have elected to comply with certain reduced public company reporting requirements. These reduced reporting requirements include reduced disclosure about our executive compensation arrangements and no non-binding advisory votes on executive compensation. We will remain an emerging growth company until the earlier of: (1) (a) December 31, 2023, (b) the last day of the fiscal year in which we have total annual gross revenue of at least $1.07 billion, or (c) the last day of the fiscal year in which we are deemed to be a large accelerated filer, which means the market value of our common stock that is held by non-affiliates exceeds $700 million as of the prior June 30, and (2) the date on which we have issued more than $1.0 billion in non-convertible debt during the prior three-year period.

Our Board 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 staggered, three-year term. Unless the Board determines that vacancies (including vacancies created by increases in the number of directors) shall be filled by the stockholders, and except as otherwise provided by law, vacancies on the Board may be filled only by the affirmative vote of a majority of the remaining directors. A director elected by the Board to fill a vacancy (including a vacancy created by an increase in the number of directors) shall serve for the remainder of the full term of the class of directors in which the vacancy occurred and until such director’s successor is elected and qualified.

The Board currently consists of nine seated directors, divided into the three following classes:

At each annual meeting of stockholders, the successors to directors whose terms will then expire will be elected to serve from the time of election and qualification until the third subsequent annual meeting of stockholders.

Mr. Leonard, Ms. Burow, and Dr. Roberts have been nominated to serve as Class III directors and have each elected to stand for reelection. Each director to be elected will hold office from the date of their election by the stockholders until the third subsequent annual meeting of stockholders or until his or her successor is elected and has been qualified, or until such director’s earlier death, resignation or removal.

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. In the event that any nominee should be unavailable for election as a result of an unexpected occurrence, such shares will be voted for the election of such substitute nominee as the Board may propose. Each person nominated for election has agreed to serve if elected, and management has no reason to believe that any nominee will be unable to serve. Directors are elected by a plurality of the votes cast at the meeting.

The following table sets forth, for the Class III nominees (who are currently standing for re-election) and for our other current directors who will continue in office after the Annual Meeting, information with respect to their ages as of April 26, 2021, and position/office held within the Company:

Set forth below is biographical information for the nominees and each person whose term of office as a director will continue after the Annual Meeting. The following includes certain information regarding our directors’ individual experience, qualifications, attributes and skills that led the Board to conclude that they should serve as directors.

Keith R. Leonard Jr. has served as our Chairman since January 2016 and served as our Chief Executive Officer from October 2016 to March 2020. Mr. Leonard was a co-founder of and served as President and Chief Executive Officer of KYTHERA Biopharmaceuticals, Inc. (NASDAQ: KYTH) , a biopharmaceutical company from August 2005 until its acquisition by Allergan plc in October 2015. Prior to that, Mr. Leonard held roles of increasing responsibility at Amgen Inc. (NASDAQ: AMGN) from October 1991 to November 2004, including as Senior Vice President and General Manager of Amgen Europe. Mr. Leonard currently serves on the board of directors of Sanifit Laboratories S.L., a biopharmaceutical company and Intuitive Surgical, Inc. (NASDAQ: ISRG), a medical device company. He previously served on the boards of directors of Sienna Biopharmaceuticals, Inc. (NASDAQ: SNNA), a biopharmaceutical company, Affymax, Inc., a public biotechnology company, Anacor Pharmaceuticals, Inc., a public biopharmaceutical company which was acquired by Pfizer Inc. in 2016, and ARYx Therapeutics, Inc., a public biopharmaceutical company. Mr. Leonard was formerly an active duty officer in the United States Navy. Mr. Leonard received a B.S. in Engineering from the University of California, Los Angeles, a B.A. in History from the University of Maryland, an M.S. in Engineering from the University of California, Berkeley, and an M.B.A. from the Anderson School of Management at the University of California, Los Angeles. We believe that Mr. Leonard is qualified to serve on our board of directors due to his extensive executive management and leadership experience in the life science industry, as well as experience as a director of public companies.

Kristina M. Burow has served as a member of our board of directors since its inception in November 2011. Ms. Burow has served as Managing Director of ARCH Venture Partners since November 2011 and previously held roles of increasing responsibility at ARCH from August 2002 to November 2011. Ms. Burow currently serves on the boards of directors of several biopharmaceutical and biotechnology companies, including Beam Therapeutics (NASDAQ: BEAM), Vividion Therapeutics, Inc., RBNC, Gossamer Bio (NASDAQ: GOSS), Metacrine (NASDAQ: MTCR), Scholar Rock (NASDAQ: SRRK), Boundless Bio, Autobahn Therapeutics, ROME Therapeutics, Boragen, and AgBiome. She previously was a co-founder and member of the board of directors of Receptos (NASDAQ: RCPT – acquired by Celgene) and was a Director of VIR Biotechnology (NASDAQ: VIR), Epirium Bio and BlackThorn

Therapeutics. Ms. Burow has participated and led investments in a number of other ARCH portfolio companies including Erasca, Dewpoint, Therapeutics, Mindstrong, Aledade, Kura Oncology (NASDAQ: KURA), KYTHERA Biopharmaceuticals, Inc. (NASDAQ: KYTH – acquired by Allergan) and Ikaria (acquired by Mallinckrodt). Prior to joining ARCH, Ms. Burow was an Associate with the Novartis BioVenture Fund in San Diego and an early employee at the Genomics Institute of the Novartis Research Foundation. Ms. Burow received a B.A. in Chemistry from the University of California, Berkeley, an M.A. in Chemistry from Columbia University, and an M.B.A. from the University of Chicago. We believe that Ms. Burow is qualified to serve on our board of directors due to her extensive experience investing in biopharmaceutical and biotechnology companies and her experience on boards of directors in the medical industry.

Margo R. Roberts, Ph.D. has served as a member of our board of directors since December 2018. Most recently, Dr. Roberts served as Chief Scientific Officer at Lyell Immunopharma, Inc. from January 2019 to January 2021. Previously, Dr. Roberts served in multiple roles at Kite Pharma Inc. (NASDAQ: KITE), a biopharmaceutical company acquired by Gilead in October 2017, including most recently as Senior Vice President of Discovery Research and Chief Scientific Officer from August 2011 to July 2018. Prior to that, Dr. Roberts served in multiple roles, including as Principal Scientist and Director of Immune and Cell Therapy, at Cell Genesys, Inc., a biotechnology company, from January 1990 to December 1998. Dr. Roberts has also served as an associate professor at the University of Virginia from 1999 to 2011. Dr. Roberts is currently a member of board of Celyad SA (NASDAQ: CYAD), a biotechnology and manufacturing services company, and InsTIL Bio Inc, a private biotechnology company focused on cellular manufacturing in oncology. Dr. Roberts received both her Bachelor of Science degree with honors and her Ph.D. degree from the University of Leeds in England. We believe that Dr. Roberts is qualified to serve on our board of directors because of her extensive experience as an executive in the biopharmaceutical industry.

Anirvan Ghosh, Ph.D. has served as our Chief Executive Officer since March 2020. Prior to joining as our Chief Executive Officer, Dr. Ghosh held a number of executive leadership roles at leading biotechnology companies, as well as senior roles in premier academic institutions. From April 2017 to March 2020, Dr. Gosh served as the Senior Vice President, Head of Research and Early Development at Biogen Inc. (NASDAQ: BIIB), a biotechnology company. In that role, Dr. Ghosh had accountability for the research and early clinical development portfolio of programs for all therapeutic areas, including ophthalmology, neuroscience, and immunology. Dr. Ghosh served as the Chief Scientific Officer at E-Scape Bio, a venture-backed private biopharmaceutical company, from May 2016 to April 2017. Prior to that, Dr. Ghosh served as the Global Head and Vice President of Neuroscience Discovery and Biomarkers at Roche Pharmaceuticals from July 2011 to April 2016. Prior to that, Dr. Ghosh held roles of increasing responsibility at The John Hopkins School of Medicine and University of California at San Diego (UCSD). After completing his postdoctoral research at Harvard Medical School, Dr. Ghosh was recruited to be on the faculty at Johns Hopkins, where he led a research lab from 1995 to 2003. In 2003, Dr. Ghosh was recruited to UCSD as the Stephen Kuffler Professor in the Division of Biology and served as chair of Neurobiology from 2008 to 2011. Dr. Ghosh received a B.S. with honor in Physics from the California Institute of Technology and a Ph.D. in Neuroscience from Stanford University. We believe that Dr. Ghosh is qualified to serve on our board of directors due to his extensive executive management and leadership experience in the life science industry.

Nathaniel E. David, Ph.D. is our co-founder and has served as a member of our board of directors since its inception in November 2011, our President from January 2016 to December 2020, and as our Chief Executive Officer from our inception until January 2016. Dr. David was a co-founder of and served as Chief Science Officer of KYTHERA Biopharmaceuticals, Inc. (NASDAQ: KYTH) from January 2005 to September 2009 and as a member of the board of directors from its inception until its acquisition by Allergan plc in October 2015. He was a co-founder and from 1999 to 2003 was Director of Business Development of Syrrx, Inc., a biotechnology company which was acquired by Takeda Pharmaceutical Company Limited, a public pharmaceutical company. Dr. David was also a co-founder of Achaogen, Inc., a public biotechnology company, and Sapphire Energy, Inc., an energy company. Dr. David previously served on the board of trustees of the Buck Institute for Research on Aging, and on the board of directors of Sapphire Energy, Inc. Dr. David received an A.B. in Biology from Harvard and a Ph.D. in Molecular and Cellular Biology from the University of California, Berkeley. We believe that Dr. David is qualified to serve on our board of directors due to his extensive scientific and operational background gained as a research scientist, founder, and executive focused on life science and pharmaceutical companies.

Gilmore O’Neill, M.B. has served as a member of our board of directors since December 2020. He has served as Chief Medical Officer and Executive Vice President, Research & Development at Sarepta Therapeutics, Inc. (NASDAQ: SRPT) since June 2018. Prior to joining Sarepta, Dr. O’Neill served as the Senior Vice President, Late Stage Clinical Development of Biogen Inc. (NASDAQ: BIIB) from November 2016 to June 2018. At Biogen, Dr. O’Neill also served as Senior Vice President, Drug Innovation Units from October 2015 to November 2016. From June 2014 to October 2015, Dr. O’Neill served as Vice President, MS Franchise & Head, Multiple Sclerosis Research & Development at Biogen. Prior to this role, Dr. O’Neill served in numerous roles at Biogen since he joined the company in April 2003, including Vice President, Global Neurology Clinical Development, Vice President, Global Late Stage Clinical Development and Vice President, Experimental Neurology (Early Stage). Dr. O’Neill is licensed to practice medicine in the state of Massachusetts. He is a member of the American Academy of Neurology and a board-certified neurologist (ABPN). Dr. O’Neill is formerly Chief Resident in Neurology at the Massachusetts General Hospital (MGH) and served, until recently, as a Clinical Instructor in Neurology at Harvard Medical School. From 1997 to 2015, Dr. O’Neill served as a clinical instructor in neurology at Harvard Medical School. He also serves on the board of directors of the Massachusetts Biotechnology Council (MassBio). Dr. O’Neill received a Bachelor of Medicine degree from University College Dublin and a Master of Medical Sciences degree from Harvard University. We believe that Dr. O’Neill is qualified to serve on our board of directors due to his extensive experience in biopharmaceutical industry and his medical background.

Paul L. Berns has served as a member of our board of directors since March 2018. Mr. Berns has been a consultant in the pharmaceutical industry since July 2016, as well as from August 2012 to March 2014 and from July 2005 to March 2006. Mr. Berns has been a member of ARCH Venture Partners since August 2018. From March 2014 to June 2016, Mr. Berns served as President and Chief Executive Officer and Chairman of the Board at Anacor Pharmaceuticals, Inc., a biopharmaceutical company, which was acquired by Pfizer Inc. in 2016. Previously,

Mr. Berns served as President and Chief Executive Officer of Allos Therapeutics, Inc., a biopharmaceutical company, from March 2006 to September 2012, when it was acquired by Spectrum Pharmaceuticals, Inc. Mr. Berns was President and Chief Executive Officer of Bone Care International, Inc., a specialty pharmaceutical company, from June 2002 to July 2005, when it was acquired by Genzyme Corporation. Prior to that, Mr. Berns was Vice President and General Manager of the Immunology, Oncology and Pain Therapeutics business unit of Abbott Laboratories (NYSE: ABT) from 2001 to 2002, and from 2000 to 2001, he served as Vice President, Marketing of BASF Pharmaceuticals/Knoll, when it was acquired by Abbott Laboratories in 2001. Earlier in his career, Mr. Berns held various positions, including senior management roles, at Bristol-Myers Squibb Company from 1990 to 2000. Mr. Berns is currently a board member of the privately held company, EQRx (since January 2020), the privately held company, Gideon Health (since August 2019), the privately held company, Epirium Bio (since July 2019), and the publicly held company, Jazz Pharmaceuticals, PLC (NASDAQ: JAZZ) (since April 2010). Mr. Berns previously served on the boards of Menlo Therapeutics, Inc. (from November 2017 to March 2020), Anacor Pharmaceuticals, Inc. (from June 2012 to June 2016), XenoPort, Inc. (from November 2005 to May 2016), Allos Therapeutics, Inc. (from March 2006 to September 2012), and Bone Care International, Inc. (from June 2002 to July 2005). Mr. Berns received his B.S. in Economics from the University of Wisconsin. We believe that Mr. Berns is qualified to serve on our board of directors because of his extensive experience in the biopharmaceutical industry and his service as a director of a number of public pharmaceutical companies.

Graham K. Cooper has served as a member of our board of directors since April 2017. From March 2018 until May 2019, Mr. Cooper served as the Chief Operating Officer and Chief Financial Officer of Assembly Biosciences, Inc. (NASDAQ: ASMB). Mr. Cooper previously served as the Chief Financial Officer of Receptos, Inc., from February 2013 until its acquisition by Celgene in August 2015 and Chief Financial Officer of Geron Corporation from January 2012 to December 2012. From May 2006 until March 2011, Mr. Cooper served as Chief Financial Officer of Orexigen Therapeutics, Inc. (NASDAQ: OREX). Prior to that, Mr. Cooper held roles of increasing responsibility at Deutsche Bank Securities, an investment bank, from August 1997 to February 2006, including as Director, Health Care Investment Banking. He began his career as an accountant at Deloitte & Touche, and was previously a C.P.A. Mr. Cooper currently serves on the board of directors of Beam Therapeutics, Inc. (NASDAQ: BEAM), a biotechnology company, Kezar Life Sciences, Inc. (NASDAQ: KZR), a biotechnology company, and Applied Molecular Transport Inc. (NASDAQ: AMTI), a biotechnology company. Mr. Cooper received a B.A. in Economics from the University of California at Berkeley and an M.B.A. from the Stanford Graduate School of Business. We believe that Mr. Cooper is qualified to serve on our board of directors due to his significant financial and accounting experience in the life sciences industry.

Camille D. Samuels has served as a member of our board of directors since March 2015. Ms. Samuels has been a Partner at Venrock, a venture capital firm, since May 2014. Prior to that, she served as a Managing Director of Versant Ventures, a life sciences venture capital firm, from February 2000 to December 2012. She previously served as a board member or a board observer on other public and private healthcare companies, including Corvidia Therapeutics, Inc., which was acquired by Novo Nordisk, Fluidigm Corporation (NASDAQ: FLDM), Genomic Health, Inc. (NASDAQ: GHDX), KYTHERA Biopharmaceuticals (NASDAQ: KYTH – acquired by Allergan), Novacardia, Inc., which was acquired by Merck & Co., Inc., ParAllele BioScience, Inc., REGENXBIO (NASDAQ: RGNX), and Syrrx. Prior to her venture career, Ms. Samuels held business development and strategic planning roles at Tularik Inc., a public biotechnology company, acquired by Amgen, as well as Genzyme Corporation (now part of Sanofi). Ms. Samuels received a B.A. in Biology from Duke University and an M.B.A. from Harvard Business School, both with high distinction.

The Audit Committee of our Board has engaged Ernst & Young LLP (“EY”), as our independent registered public accounting firm for the year ending December 31, 2021 and is seeking ratification of such appointment by our stockholders at the Annual Meeting. EY has served as the Company’s independent registered public accounting firm since 2017. Representatives of EY are expected to be present at the Annual Meeting. They will have an opportunity to make a statement if they so desire and will be available to respond to appropriate questions.

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

The following table provides information regarding the fees incurred for services related to the fiscal years ended December 31, 2020 and 2019, by EY, our independent registered public accounting firm.

All of the services described above were pre-approved by our Audit Committee. The Committee concluded that the provision of these services by EY would not affect their independence.

The Audit Committee or a delegate of the Audit Committee pre-approves, or provides pursuant to pre-approvals policies and procedures for the pre-approval of, all audit and non-audit services provided by its independent registered public accounting firm. This policy is set forth in the charter of the Audit Committee and is available at http://ir.unitybiotechnology.com/investor-relations.

The Audit Committee approved all of the audit, audit-related, tax and other services provided by EY for 2020 and the estimated costs of those services. Actual amounts billed, to the extent in excess of the estimated amounts, are periodically reviewed and approved by the Audit Committee.

The material in this report is not “soliciting material,” is not deemed “filed” with the SEC and is not to be incorporated by reference into any filing of Unity under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended.

The primary purpose of the Audit Committee is to oversee our financial reporting processes on behalf of our Board. The Audit Committee’s functions are more fully described in its charter, which is available on our website at http://ir.unitybiotechnology.com/investor-relations. Management has the primary responsibility for our financial statements and reporting processes, including our systems of internal controls.

In fulfilling its oversight responsibilities, the Audit Committee reviewed and discussed with management Unity’s audited financial statements as of and for the year ended December 31, 2020. The Audit Committee has discussed with Ernst & Young LLP (“EY”), the Company’s independent registered public accounting firm, the matters required to be discussed by the applicable requirements of, Communications with Audit Committees, as adopted by the Public Company Accounting Oversight Board (“PCAOB”) and the SEC.

In addition, the audit committee has received the written disclosures and the letter from EY required by PCAOB Ethics and Independence Rule 3526, “Communication with Audit Committees Concerning Independence”, and the Audit Committee has discussed with EY their independence from the Company and its management. Finally, the Audit Committee discussed with EY, with and without management present, the scope and results of EY’s audit of such financial statements.

Based on these reviews and discussions, the Audit Committee has recommended to our Board that such audited financial statements be included in our Annual Report on Form 10-K for the year ended December 31, 2020 for filing with the SEC. The Audit Committee has selected EY as our independent registered public accounting firm for the fiscal year ending December 31, 2021 and is seeking ratification of such appointment by the stockholders.

We have adopted a Code of Business Conduct and Ethics that applies to all of our employees, officers, directors, and consultants, including those officers responsible for financial reporting. The code of business conduct and ethics is available on our website at http://ir.unitybiotechnology.com/investor-relations. We expect that any amendments to the code, or any waivers of its requirements, will be disclosed on our website. The reference to our web address does not constitute incorporation by reference of the information contained at or available through our website.

We believe in sound corporate governance practices and have adopted formal Corporate Governance Guidelines to enhance our effectiveness. Our Board adopted these Corporate Governance Guidelines in order to ensure that it has the necessary practices in place to review and evaluate our business operations as needed and to make decisions that are independent of our management. The Corporate Governance Guidelines are also intended to align the interests of directors and management with those of our stockholders. The Corporate Governance Guidelines set forth the practices our Board follows with respect to Board and committee composition and selection, Board meetings, Chief Executive Officer performance evaluation, and succession planning. A copy of our Corporate Governance Guidelines is available on our website at http://ir.unitybiotechnology.com/investor-relations.

As required under the Nasdaq Global Select Market (“Nasdaq”) rules and regulations, a majority of the members of a listed company’s board of directors must qualify as “independent,” as affirmatively determined by such board. The Board consults with the Company’s counsel to ensure that the Board’s determinations are consistent with all relevant securities and other laws and regulations regarding the definition of “independent,” including those set forth in pertinent Nasdaq listing standards, as in effect from time to time.

Consistent with these considerations, our Board has determined that all of our directors, other than Mr. Leonard and Drs. David and Ghosh, qualify as “independent” directors in accordance with the Nasdaq listing requirements. Dr. Ghosh is not considered independent, because he is an employee of Unity. Mr. Leonard and Dr. David are not considered independent, because each has been an employee of Unity within the last three years. The Nasdaq independence definition includes a series of objective tests, such as that the director is not, and has not been for at least three years, one of our employees and that neither the director nor any of his or her family members has engaged in various types of business dealings with us. In addition, as required by Nasdaq rules, our Board has made a subjective determination as to each independent director that no relationships exist, which, in the opinion of our Board, would interfere with the exercise of independent judgment in carrying out the responsibilities of a director. In making these determinations, our Board considered information provided by the directors and us with regard to each director’s business and personal activities and relationships as they may relate to us and our management. There are no family relationships among any of our directors or executive officers.

As required under Nasdaq rules and regulations, our independent directors meet in regularly scheduled executive sessions at which only independent directors are present. Each of the Audit Committee, Compensation Committee, and Nominating and Corporate Governance Committee of our Board are comprised entirely of directors determined by the Board to be independent within the meaning of Nasdaq and SEC rules and regulations applicable to the members of such committees.

Our bylaws and Corporate Governance Guidelines provide our Board with flexibility to combine or separate the positions of Chairman of the Board and Chief Executive Officer and/or to implement a lead director in accordance with its determination that utilizing one or the other structure would be in the best interests of the Company. Mr. Leonard currently serves as the Chairman of our Board, and Mr. Berns currently serves as the lead independent director of the Board. All of our directors are encouraged to make suggestions for agenda items and pre-meeting materials for meetings of the Board of Directors. In addition, in his role as lead independent director, Mr. Berns presides over the executive sessions of the Board in which our Chief Executive Officer does not participate and serves as a liaison to management on behalf of the independent members of the Board of Directors.

Our Board has concluded that our current leadership structure is appropriate at this time. However, our Board will continue to periodically review our leadership structure and may make such changes in the future as it deems appropriate.

Risk assessment and oversight are an integral part of our governance and management processes. Our Board encourages management to promote a culture that incorporates risk management into our corporate strategy and day-to-day business operations. Management discusses strategic and operational risks at regular management meetings and conducts specific strategic planning and review sessions during the year that include a focused discussion and analysis of the risks facing us. Throughout the year, senior management reviews these risks with the Board at regular Board meetings as part of management presentations that focus on particular business functions, operations, or strategies and presents the steps taken by management to mitigate or eliminate such risks.

Our Board does not have a standing risk management committee, but rather administers this oversight function directly through our Board as a whole, as well as through various standing committees of our Board that address risks inherent in their respective areas of oversight. While our Board is responsible for monitoring and assessing strategic risk exposure, our Audit Committee is responsible for overseeing our major financial risk exposures and the steps our management has taken to monitor and control these exposures. The Audit Committee also monitors compliance with legal and regulatory requirements and considers and approves or disapproves any related person transactions. Our Nominating and Corporate Governance Committee monitors the effectiveness of our corporate governance guidelines and considers and approves or disapproves any related person transactions. Our Compensation Committee assesses and monitors whether any of our compensation policies and programs has the potential to encourage excessive risk-taking.

Our Board has the following standing committees: an Audit Committee, a Compensation Committee, a Nominating and Corporate Governance Committee, and a Science Committee. Our Board may establish other committees to facilitate the management of our business. The composition and functions of each committee are described below.

Our Audit Committee oversees our corporate accounting and financial reporting process. Among other matters, the Audit Committee:

The current members of our Audit Committee are Paul L. Berns, Graham K. Cooper, and Camille D. Samuels. Mr. Cooper serves as the Chair of the committee. All members of our Audit Committee meet the requirements for financial literacy under the applicable rules and regulations of the SEC and Nasdaq. Our Board has determined that Mr. Cooper is an audit committee financial expert as defined under the applicable rules of the SEC and has the requisite financial sophistication as defined under the applicable rules and regulations of Nasdaq. Under the rules of the SEC, members of the audit committee must also meet heightened independence standards. Our Board has determined that each of Messrs. Berns and Cooper and Ms. Samuels are independent under the applicable rules of the SEC and Nasdaq.

The Audit Committee operates under a written charter that satisfies the applicable standards of the SEC and Nasdaq. A copy of the Audit Committee charter is available to security holders on the Company’s website at http://ir.unitybiotechnology.com/investor-relations.

Our Compensation Committee oversees policies relating to compensation of and benefits for our officers and employees. The Compensation Committee approves or recommends to our Board corporate goals and objectives relevant to the compensation of our executive officers (other than our Chief Executive Officer), evaluates the performance of these officers in light of those goals and objectives, and approves the compensation of these officers based on such evaluations. The Compensation Committee also reviews and approves or makes recommendations to our Board regarding the issuance of stock options and other awards under our stock plans to our executive officers (other than our Chief Executive Officer). The Compensation Committee reviews the performance of our Chief Executive Officer and makes recommendations to our Board with respect to his compensation and our Board retains the authority to make compensation decisions relative to our Chief Executive Officer. The Compensation Committee will review and evaluate, at least annually, the performance of the Compensation Committee and its members, including compliance by the Compensation Committee with its charter.

The current members of our Compensation Committee are Paul L. Berns, Kristina M. Burow, and Graham K. Cooper. Mr. Berns serves as the Chair of the committee. Each of the members of our Compensation Committee is independent under the applicable rules and regulations of Nasdaq and is a “non-employee director” as defined in Rule 16b-3 promulgated under the Securities Exchange Act of 1934, as amended (the “Exchange Act”).

Our Compensation Committee has retained Radford, a part of Rewards Solutions practice at AON plc (“AON Radford”), a compensation consulting firm, to serve as its independent compensation consultant and to conduct market research and analysis on our various executive positions, to assist the committee in developing appropriate incentive plans for our executives on an annual basis, to provide the committee with advice and ongoing recommendations regarding material executive compensation decisions, and to review compensation proposals of management. AON Radford reports directly to the Compensation Committee and does not provide any non-compensation related services to the Company. The Compensation Committee reviewed the independence of AON Radford, employing the independence factors specified in the listing requirements of Nasdaq. Based on this assessment, the Compensation Committee determined that the engagement of AON Radford does not raise any conflicts of interest or similar concerns. In addition, the Compensation Committee evaluated the independence of its other outside advisors to the Compensation Committee, including outside legal counsel, considering the same independence factors and concluded their work for the Compensation Committee does not raise any conflicts of interest.

The Compensation Committee operates under a written charter that satisfies the applicable standards of the SEC and the Nasdaq rules. A copy of the Compensation Committee charter is available to security holders on the Company’s website at http://ir.unitybiotechnology.com/investor-relations.

The Nominating and Corporate Governance Committee is responsible for making recommendations to our Board regarding candidates for directorships and the size and composition of our Board. In addition, the Nominating and Corporate Governance Committee is responsible for overseeing our corporate governance policies and reporting and making recommendations to our Board concerning governance matters.

The current members of our Nominating and Corporate Governance Committee are Camille D. Samuels, Kristina M. Burow, and Margo R. Roberts. Ms. Samuels serves as the Chair of the committee. Each of the members of our Nominating and Corporate Governance Committee is an independent director under the applicable rules and regulations of Nasdaq relating to Nominating and Corporate Governance Committee independence.

The Nominating and Corporate Governance Committee operates under a written charter that satisfies the applicable standards of the SEC and Nasdaq rules. A copy of the Nominating and Corporate Governance Committee charter is available to security holders on the Company’s website at http://ir.unitybiotechnology.com/investor-relations.

Our Nominating and Corporate Governance Committee is responsible for reviewing with the Board, on an annual basis, the appropriate characteristics, skills, and experience required for the Board as a whole and its individual members. In evaluating the suitability of individual candidates (both new candidates and current members), the Nominating and Corporate Governance Committee, in recommending candidates for election, and the Board, in approving (and, in the case of vacancies, appointing) such candidates, may take into account many factors, including but not limited to the following:

Currently, our Board evaluates each individual in the context of the Board as a whole, with the objective of assembling a group that can best maximize the success of the business and represent stockholder interests through the exercise of sound judgment using its diversity of experience in these various areas.

The Nominating and Corporate Governance Committee will consider director candidates recommended by stockholders. For a stockholder to make any nomination for election to the Board at an annual meeting, the stockholder must provide notice to the Company, which notice must be delivered to, or mailed and received at, the Company’s principal executive offices not less than 90 days and not more than 120 days prior to the one-year anniversary of the preceding year’s annual meeting; provided, that if the date of the annual meeting is more than 30 days before or more than 60 days after such anniversary date, the stockholder’s notice must be delivered, or mailed and received, not later than 90 days prior to the date of the annual meeting or, if later, the 10^th day following the date on which public disclosure of the date of such annual meeting is made. Further updates and supplements to such notice may be required at the times, and in the forms, required under our bylaws. As set forth in our bylaws, submissions must include the name and address of the proposed nominee, information regarding the proposed nominee that is required to be disclosed in a proxy statement or other filings in a contested election pursuant to Section 14(a) under the Exchange Act, information regarding the proposed nominee’s indirect and direct interests in shares of the Company’s common stock, and a completed and signed questionnaire, representation, and agreement

of the proposed nominee. Our bylaws also specify further requirements as to the form and content of a stockholder’s notice. We recommend that any stockholder wishing to make a nomination for director review a copy of our bylaws, as amended and restated to date, which is available, without charge, from our Corporate Secretary, at Unity Biotechnology, Inc., 285 East Grand Ave., South San Francisco, CA 94080.

The Science Committee reviews, evaluates, and advises the Board on the overall strategy, direction, and effectiveness of our research and development programs and related investments, and on our Company’s progress in achieving its long-term strategic research and development goals and objectives. This includes regularly reviewing and making recommendations to the Board and management with respect to the Company’s research and development pipeline, evaluating and advising the Board and management on the opportunities and risks associated with the products, programs. and technologies in which we are, or are considering, investing our research and development efforts, understanding emerging or evolving scientific or technological issues of importance to us, and assisting the Board in understanding our intellectual property position in connection with the foregoing and otherwise.

The current members of our Science Committee are Gilmore O’Neill, Margo R. Roberts, and Nathaniel E. David. Dr. O’Neill serves as the Chair of the committee.

Our Board has adopted an Insider Trading Compliance Policy, which applies to all of our directors, officers, employees, and certain consultants. The policy prohibits our directors, officers, employees, and certain consultants and any entities they control from purchasing financial instruments such as zero-cost collars and forward sale contracts, or otherwise engaging in transactions that hedge, or are designed to hedge, any decrease in the market value of the Company’s equity securities, or that may cause an officer, director, employee, or certain consultants to no longer have the same objectives as the Company’s other stockholders.

Our Board met twelve times and acted by unanimous written consent eight times during 2020. The Audit Committee met four times and acted by unanimous written consent twice. The Compensation Committee met eight times and acted by unanimous written consent six times. The Nominating and Corporate Governance Committee met three times and did not act by unanimous written consent. During 2020, each Board member attended at least 75% of the meetings of the Board and of the committees of the Board on which he or she served, in each case, to the extent appointed as a Board member at the relevant time of each meeting, except for Mr. Nelsen, who attended 73% of the board of directors meetings held in 2020. We encourage all of our directors and nominees for director to attend our annual meeting of stockholders; however, attendance is not mandatory. We encourage all of our directors and nominees for director to attend our annual meeting of stockholders; however, attendance is not mandatory.

Should stockholders wish to communicate with the Board or any specified individual directors, such correspondence should be sent to the attention of the Corporate Secretary, at Unity Biotechnology, Inc. 285 East Grand Ave., South San Francisco, CA 94080. The Corporate Secretary will forward the communication to the Board members.

During 2020, our Compensation Committee consisted of Messrs. Berns and Cooper and Ms. Burow. None of the members of our Compensation Committee has at any time been one of our officers or employees. None of our executive officers currently serve, or in the past fiscal year has served, as a member of the board of directors or compensation committee of any entity that has one or more executive officers on our Board or Compensation Committee.

We describe below transactions and series of similar transactions, since January 1, 2020, to which we were a party or will be a party, in which:

See “Executive Compensation” and “Director Compensation” for information regarding compensation of directors and executive officers.

We have entered into employment agreements with our executive officers. For more information regarding these agreements, see “Executive Compensation−Narrative to 2020 Summary Compensation Table and Outstanding Equity Awards at 2020 Fiscal Year End.”

We have entered into indemnification agreements with each of our directors and executive officers. These agreements, among other things, require us to indemnify each director and executive officer to the fullest extent permitted by Delaware law, including indemnification of expenses such as attorneys’ fees, judgments, penalties, fines, and settlement amounts incurred by the director or executive officer in any action or proceeding, including any action or proceeding by or in right of us, arising out of the person’s services as a director or executive officer. We have obtained an insurance policy that insures our directors and officers against certain liabilities, including liabilities arising under applicable securities laws.

We entered into an amended and restated investors’ rights agreement with the purchasers of shares of our convertible preferred stock, including entities with which certain of our directors are affiliated, which were outstanding prior to our initial public offering in May 2018 and which converted into shares of common stock in connection therewith. As of December 31, 2020, the holders of approximately 10.3 million shares of our common stock, including the shares of common stock issuable upon exercise of outstanding options, are entitled to rights with respect to the registration of their shares under the Securities Act.

In 2016, we entered into a services agreement with Wuxi AppTec (Hong Kong) Limited, an affiliate of Wuxi PharmaTech Healthcare Fund I L.P. (“WuXi PharmaTech”), a beneficial owner of more than 5% of our outstanding capital stock. We incurred a total of $36,000, $0.6 million, $1.5 million, $1.8 million, $0.7 million and $0 in research and development expenses during the years ended December 31, 2016, 2017, 2018, 2019, and 2020, and the quarter ended March 31, 2021, respectively, related to this services agreement. In September 2018, we entered into a services arrangement with STA Pharmaceutical Hong Kong Limited, another affiliate of WuXi PharmaTech. We incurred a total of $0.1 million, $0.5 million, and $0.1 million in research and development expenses during the years ended December 31, 2019 and 2020 and the quarter ended March 31, 2021, respectively, in connection with this services arrangement. In November 2018, we entered into a services arrangement with WuXi Biologics (Hong Kong) Limited, another affiliate of WuXi PharmaTech. We incurred a total of $0.1 million, $0.2 million, and $0 in research and development expenses during the years ended December 31, 2019 and 2020 and the quarter ended March 31, 2021, respectively, in connection with this services arrangement.

Our Board has adopted a written related person transaction policy setting forth the policies and procedures for the review and approval or ratification of related person transactions. This policy covers, with certain exceptions set forth in Item 404 of Regulation S-K under the Securities Act of 1933, as amended, any transaction, arrangement or relationship, or any series of similar transactions, arrangements or relationships in which we were or are to be a

participant, where the amount involved exceeds $120,000 and a related person had or will have a direct or indirect material interest, including, without limitation, purchases of goods, or services by or from the related person or entities in which the related person has a material interest, indebtedness, guarantees of indebtedness, and employment by us of a related person. In reviewing and approving any such transactions, our Audit Committee is tasked to consider all relevant facts and circumstances, including, but not limited to, whether the transaction is on terms comparable to those that could be obtained in an arm’s length transaction with an unrelated third party and the extent of the related person’s interest in the transaction. All of the transactions described in this section occurred prior to the adoption of this policy.

We maintain a compensation program for our non-employee directors (the “Director Compensation Program”), which was last amended effective March 30, 2020. We do not provide directors who are also our employees any additional compensation for their service as directors.

Pursuant to the Director Compensation Program, effective as of January 1, 2020, each non-employee director receives an annual retainer of $35,000, the lead independent director receives an additional annual retainer of $25,000, the chairman receives an additional annual retainer of $35,000, and non-employee directors who serve on one or more committees are eligible to receive the following annual committee fees:

Under the Director Compensation Program, each non-employee director who is elected or appointed to our Board will automatically receive an option to purchase 50,000 shares of our common stock upon the director’s initial appointment or election to our Board (the “Initial Director Grant”). In addition, each non-employee director who is serving on our Board immediately following an annual stockholder’s meeting will automatically be granted an annual option to purchase 25,000 shares of our common stock on the date of such annual stockholder’s meeting (the “Annual Director Grant”), provided that the number of shares subject to the Annual Director Grant will be prorated for any partial year of service as a non-employee director. Each option granted under the Director Compensation Program has an exercise price per share equal to the closing trading price of our common stock on the date of grant (or the immediately preceding trading day if our common stock is not traded on the date of grant). The Initial Director Grant will vest as to 1/36^th of the underlying shares on a monthly basis over three years, subject to continued service through each applicable vesting date. The Annual Director Grant will vest in full on the earlier of the first anniversary of the grant date or immediately prior to the next annual stockholders meeting, subject to continued service through the applicable vesting date. All equity awards granted to our non-employee directors under the Director Compensation Program will vest in full immediately prior to the consummation of a change in control.

Effective March 30, 2020, Mr. Leonard stepped down as our Chief Executive Officer but continued his service as Chairman of the Board. Between March 30, 2020 and June 30, 2020, Mr. Leonard provided transition services to us in exchange for continued vesting of his outstanding equity awards pursuant to their existing terms. Notwithstanding his continued service to the Company as Chairman, Mr. Leonard agreed to forfeit the unvested portions of his equity awards at the end of the transition services on June 30, 2020, except for the option granted to Mr. Leonard on January 19, 2017, which continued to vest in accordance with its terms based on his continued service as Chairman through October 26, 2020. Mr. Leonard is eligible to participate in the Director Compensation Program as a non-employee director, but in lieu of an Annual Director Grant on the date of the 2020 Annual Meeting, Mr. Leonard was granted an Initial Director Grant on the date of the 2020 Annual Meeting.

Prior to Dr. O’Neill’s appointment to the Board, we granted to Dr. O’Neill certain options in consideration for his service as a strategic adviser to the Company. In June 2020, we granted to Mr. O’Neill an option to purchase 30,000 shares of our common stock, which vests as to 1/36^th of the shares subject to the option on each monthly anniversary of June 1, 2020, subject to his continued service. In September 2020, we granted to Mr. O’Neill an option to purchase 10,000 shares of our common stock, which vests as to 1/12^th of the shares subject to the option on each monthly anniversary of the grant date, subject to continued service.

The following table sets forth information concerning the compensation earned by our non-employee directors during the year ended December 31, 2020. Drs. David and Ghosh served as both directors and executive officers of the Company during fiscal year 2020. Because they did not receive any compensation for their services as directors during 2020, they are not included in the table below. Mr. Leonard served as a non-employee director following his resignation as our Chief Executive Officer in March 2020. The 2020 compensation of Dr. Ghosh and Mr. Leonard, as named executive officers, are set forth in the 2020 Summary Compensation Table below.

The following is biographical information for our executive officers, including their ages as of April 26, 2021 and position/office held with the Company.

Dr. Ghosh’s biographical information is included above under “Proposal No. 1 Election of Directors.”

Lynne Sullivan has served as our Chief Financial Officer since July 2020 and Head of Corporate Development since January 29, 2021. Previously, Ms. Sullivan was Chief Financial Officer at Compass Therapeutics, LLC from December 2018 to August 2019. Prior to that, Ms. Sullivan most recently served as Senior Vice President of Finance for Biogen Inc. (NASDAQ: BIIB) from September 2016 to December 2018. Prior to joining Biogen, Ms. Sullivan served as Senior Vice President, Tax and Corporate Finance for Biogen from June 2015 to December 2018 and served as Vice President, Tax for Biogen from April 2008 to June 2015. From January 2000 through April 2008, Ms. Sullivan served as Vice President Tax for EMD Serono and the Vice President of Tax for North America at Merck KgaA. Ms. Sullivan also currently serves as a member of the boards of directors and as chair of the audit committees of a number of public biopharmaceutical companies, including Solid Biosciences Inc., Inozyme Pharma, and BiomX Inc. Ms. Sullivan holds an M.S. in taxation from Bentley University and a B.S.B.A. from Suffolk University. Ms. Sullivan was a Certified Public Account for over 20 years.

Jamie Dananberg, M.D. has served as our Chief Medical Officer since January 2016. Prior to that, Dr. Dananberg held roles of increasing responsibility at Takeda Pharmaceutical Company (NYSE: TAK), a public pharmaceutical company, from August 2012 to October 2015, including as Executive Vice President, and at Eli Lilly & Co. (NYSE: LLY), a public pharmaceutical company, from October 2000 to September 2012, including as Vice President for Translational Medicine and Tailored Therapeutics. Dr. Dananberg was at the University of Michigan from 1983-1996, where he practiced medicine in Endocrinology & Metabolism and ran a basic science laboratory in metabolic effects on cardiac and vascular function. Dr. Dananberg received a B.S. in Biology and an M.D. from Tufts University.

Alexander Nguyen, J.D. has served as our General Counsel and Corporate Secretary since March 2021. Most recently, Mr. Nguyen served in a number of leadership roles at Roivant Sciences and its affiliates from May 2016 through November 2019, including as General Counsel at Alyvant, Inc., Head of Legal at Axovant Sciences, Inc., and Head of Compliance at Roivant Sciences, Inc. Between 2015 and 2016, Mr. Nguyen served as a litigation partner at Edelson PC. From 2007 through 2015, Mr. Nguyen served as Deputy Section Chief and Federal Prosecutor at the U.S. Attorney’s offices in Alexandria and Philadelphia, respectively. Between 2010 and 2011, Mr. Nguyen additionally served as Assistant White House Counsel. Mr. Nguyen obtained a B.A. from Harvard University and a J.D. from Yale Law School.

The following discusses our executive compensation program for our 2020 named executive officers (“NEOs”). As an “emerging growth company” as defined in the JOBS Act, we are not required to include a Compensation Discussion and Analysis section and have elected to comply with the scaled disclosure requirements applicable to emerging growth companies. In addition, as an emerging growth company, we are not required to hold an advisory vote to approve the compensation of our NEOs, or “say-on-pay” vote.

Our Compensation Committee, the members of which are appointed by our Board, is responsible for establishing, implementing, and monitoring our compensation philosophy and objectives. We seek to ensure that the total compensation paid to our executive officers is reasonable and competitive. Compensation of our executives is structured around the achievement of individual performance and near-term corporate targets as well as long-term business objectives.

Our NEOs for fiscal year 2020 and their positions with the Company were as follows:

Mr. Leonard stepped down as our Chief Executive Officer effective March 30, 2020, at which time Dr. Ghosh was appointed our Chief Executive Officer. Mr. Leonard continues to serve as our Chairman. Ms. Sullivan was appointed our interim Chief Financial Officer effective August 1, 2020, our Chief Financial Officer effective September 1, 2020, and our Head of Corporate Development effective January 29, 2021.

The following table sets forth total compensation earned by our NEOs for the fiscal years presented.

The following table lists all outstanding equity awards held by our NEOs as of December 31, 2020.

We believe our executive compensation program is closely aligned with stockholders’ interests. While base salary and an annual performance-based cash incentive opportunity incentivize the achievement of shorter-term goals, our long-term equity awards represent a longer-term compensation structure that promotes retention and continuous commitment to the operating results of the Company. We further believe this compensation mix rewards each executive, including the NEOs, for their individual contributions to the Company, both present and future.

At this phase in our growth cycle, a majority of the total direct compensation of our NEOs is directly tied, through the use of equity awards, to the growth in the value of our common stock.

The Compensation Committee oversees our executive compensation program (including our executive compensation policies and practices), administers our various equity plans and approves or makes recommendations regarding the compensation of our executive officers, including our NEOs, to the Board. The Compensation Committee reviews the performance of each NEO to determine whether to make any changes to their compensation. The Compensation Committee approves such changes or presents its recommendations to our Board for review and final approval.

Our Chief Executive Officer makes recommendations to the Compensation Committee regarding the salary, annual cash incentive award, and equity awards for the executive officers other than himself, including the other NEOs. At the Compensation Committee’s request, our Chief Executive Officer reviews with the Compensation Committee the individual performance of each of the other executive officers, including each of our other NEOs. The Compensation Committee gives considerable weight to our Chief Executive Officer’s evaluations and determines whether the recommended changes in each executive officer’s compensation, if any, are appropriate.

The Compensation Committee receives support from our Human Resources Department in designing our executive compensation program and analyzing competitive market practices. In addition, our Chief Executive Officer participates in Compensation Committee meetings (other than when his own compensation is being discussed), providing input from our executive team on organizational structure, executive development, and financial analysis.

While the Compensation Committee does not establish compensation levels based solely on a review of competitive market data, it believes that such data is a useful tool in its deliberations as it recognizes that our compensation policies and practices must be competitive in the marketplace for us to be able to attract, motivate, and retain qualified executive officers. Generally, the Compensation Committee reviews our executive compensation relative to our established competitive market (based on an analysis of the compensation policies and practices of a select group of peer companies) every year. The Compensation Committee uses the competitive market data when evaluating all aspects of executive compensation. The Compensation Committee engages AON Radford to assist with updating our compensation peer group and assessing the competitiveness of our executive compensation program.

We use base salary to compensate our NEOs for their experience, skills, knowledge, role, and responsibilities. When establishing the base salaries of our NEOs, our Board of Directors and the Compensation Committee consider a variety of factors, including each NEO’s seniority and level of responsibility as well as competitive market data and our ability to find a replacement if the individual left our employment. The base salary of each NEO is initially set upon the NEO’s commencement of employment with us and reviewed annually and adjusted from time to time to reflect performance and realign with market data.

In January 2020, upon recommendation of the Compensation Committee, the Board approved increasing Dr. Dananberg’s annual base salary from $428,500 to $442,020. Dr. Ghosh’s annual base salary was set at $550,000 in connection with his commencement of employment in March 2020, and Ms. Sullivan’s annual base salary was set at $400,000 in connection with her commencement of employment in August 2020.

We use cash incentive compensation to motivate our NEOs to achieve our annual operational objectives, while making progress towards our longer-term growth and other corporate goals. At the beginning of each year, typically

in January, the Board approves a set of technical, operational, and financial goals for the Company for that year which are key drivers in determining the eventual cash incentive compensation for that year. The Compensation Committee recommends annual cash incentive compensation targets for our NEOs to our Board for its consideration and approval. Each NEO’s target cash incentive is expressed as a percentage of base salary which can be achieved by meeting corporate goals at target level and, in the case of Ms. Sullivan and Dr. Dananberg, individual performance. The 2020 annual cash incentive targets for Dr. Ghosh, Ms. Sullivan and Dr. Dananberg were set at 55%, 40%, and 40% of their respective base salaries. For 2020, the annual cash incentive targets for Dr. Ghosh and Ms. Sullivan were prorated to reflect their partial period of employment during the year.

For 2020, our NEOs were eligible to earn annual cash incentives based on the achievement of certain corporate performance objectives approved by the Compensation Committee and the Board, as well as individual performance objectives for Ms. Sullivan and Dr. Dananberg. For 2020, the Board set corporate performance goals in the three broad strategic areas of: (i) advancing therapeutic programs, (ii) discovering new molecules, paths and diseases, and (iii) company building. Each area included specific performance objectives and a corresponding weighting. For each strategic area, the Board also approved certain “stretch” goals with corresponding weightings, such that the corporate goals could be achieved at up to 150% of target. In the case of Ms. Sullivan and Dr. Dananberg, 75% of the cash incentive was determined by the Company’s performance and 25% was determined by individual performance. The entirety of Dr. Ghosh’s annual cash incentive was determined by the Company’s performance. In January 2021, the Board reviewed and approved the achievement of our 2020 corporate goals at 94%. Based on this level of achievement and adjustments for individual 2020 performance for Ms. Sullivan and Dr. Dananberg, which were determined by the Board following the recommendation of Dr. Ghosh, our NEOs were paid the amounts set forth above in the Summary Compensation Table in the column titled “Non-Equity Incentive Plan Compensation.”

We use equity awards to motivate and reward our executive officers for long-term corporate performance based on the value of the Company’s common stock and, thereby, align the interests of our executive officers with those of our shareholders. We believe equity provides appropriate long-term incentive and retention of our executive officers.

In 2020, we made annual grants of equity awards to our executive officers, including Dr. Dananberg, and new-hire grants of equity awards to each of Dr. Ghosh and Ms. Sullivan. In addition, in September 2020, we made grants of retention equity awards to each of our named executive officers in connection with a restructuring of our Company implemented in the third and fourth quarters of 2020.

The table below sets forth the grants of equity awards made to Dr. Ghosh, Ms. Sullivan, and Dr. Dananberg in 2020.

The annual options granted to Dr. Dananberg vest as to 1/48^th of the shares on each monthly anniversary of the grant date, and the annual restricted stock units granted to Dr. Dananberg vest one-third on each of the first three anniversaries of the grant date, in each case, subject to continued service on each applicable vesting date.

The new hire options granted to Dr. Ghosh and Ms. Sullivan and the retention option granted to Dr. Ghosh vest as to 25% of the shares on the first anniversary of the grant date and as to 1/48^th of the share on each monthly anniversary thereafter, subject to continued service on each applicable vesting date. However, in the event of a change in control or Ms. Sullivan’s removal as the Company’s Chief Financial Officer by the Company other than for cause,

in each case, prior to the first anniversary of her employment commencement date, the option would vest as to 25% of the total number of shares and the remaining shares subject to the option would vest in accordance with the original vesting schedule, subject to her continued service. The new hire restricted stock units granted to Dr. Ghosh vest one-third on each of the first three anniversaries of the grant date, in each case, subject to continued service on each applicable vesting date, and the new hire stock award granted to Dr. Ghosh was fully vested on grant. However, in the event Dr. Ghosh’s employment was terminated for cause or he resigned for any reason prior to the first anniversary of his employment commencement date, Dr. Ghosh would have been obligated to pay to the Company an amount in cash equal to the product of 30,000 and the closing price of the Company’s common stock on the grant date, less the amount of taxes paid on issuance of the stock award.

The new hire performance stock units (“PSUs”) granted to Dr. Ghosh will vest as follows: 50,000 PSUs will vest upon the attainment of (i) a volume-weighted average per share trading price of the Company’s common stock of at least $36.875 for a trailing 30-day period or (ii) a change in control transaction in which the price per share to the holders of the Company’s common stock is at least $36.875. The remaining PSUs will vest (i) at such time as the Company’s market capitalization reaches at least $2.5 billion, as measured by a trailing 30 day volume weighted average price or (ii) a change in control transaction in which the consideration paid to the Company’s stockholders is equal to at least $2.5 billion, as determined by the Board. The PSUs will expire to the extent unvested as of the tenth anniversary of the date of grant.

The retention RSUs granted to each NEO vest as to one-third on the first anniversary of the grant date and as to the remaining RSUs in substantially equal quarterly installments over the next two years, subject to continued service on each applicable vesting date.

In January 2021, the Board approved amending Dr. Ghosh’s new hire PSUs granted to vest as follows: 50,000 PSUs will vest upon the attainment of (a) a volume-weighted average per share closing trading price of the Company’s common stock of at least $18.00 over a trailing 30-day period or (b) a change in control transaction in which the price per share to the holders of the Company’s common stock is at least $18.00). The remaining PSUs will vest upon the attainment of (a) a volume-weighted average per share closing trading price of the Company’s common stock of at least $36.00 over a trailing 30-day period or (b) a change in control transaction in which the price per share to the holders of the Company’s common stock is at least $36.00.

Effective March 30, 2020, Mr. Leonard stepped down as our Chief Executive Officer, but continued his service as Chairman of the Board. Because of the anticipated transition, Mr. Leonard did not receive an annual grant of equity awards. However, as described above under “Director Compensation”, on the date of the 2020 annual meeting of stockholders, Mr. Leonard received an option to purchase 50,000 shares of our common stock for his service as a non-employee director, which vests in equal monthly installments over the three-year period following the grant date.

Between March 30, 2020, and June 30, 2020, Mr. Leonard provided transition services to us in exchange for continued vesting of his outstanding equity awards pursuant to their existing terms. Notwithstanding his continued service to the Company as Chairman, Mr. Leonard agreed to forfeit the unvested portions of his equity awards at the end of the transition services on June 30, 2020, except for the option granted to Mr. Leonard on January 20, 2017, which continued to vest in accordance with its terms based on his continued service as Chairman through October 26, 2020.

We maintain a 401(k) retirement savings plan for our employees, including our NEOs, who satisfy certain eligibility requirements. Our NEOs are eligible to participate in the 401(k) plan on the same terms as other full-time employees. We make matching safe-harbor contributions made by participants in the 401(k) plan at 100% of the first 4% of each participant’s contributions. We believe that providing a vehicle for tax-deferred retirement savings though our 401(k) plan adds to the overall desirability of our executive compensation package and further incentivizes our employees, including our NEOs, in accordance with our compensation policies.

Pursuant to Dr. Ghosh’s employment agreement, we provided to Dr. Ghosh reimbursement of up to $50,000 in relocation expenses, reimbursement of taxes incurred by him with respect to the foregoing, and a temporary housing allowance of $3,000 per month for his first year of employment and $2,000 per month for his second year of employment.

Pursuant to Mr. Leonard’s employment agreement, which was in effect in 2020 prior to his resignation as our Chief Executive Officer, we provided a monthly allowance of $7,500 for housing in the San Francisco Bay Area, where our principal offices are located. We also provided to Mr. Leonard reimbursement of commuting expenses to our principal offices and reimbursed certain taxes incurred by him in connection with our reimbursement of certain of his travel expenses.

We believe these benefits are reasonable and are intended to facilitate the applicable NEO’s relocation and/or accessibility to the business as required. Other than the benefits described above, we do not provide perquisites or other personal benefits to our NEOs.

During 2020, we were party to employment agreements with each of our NEOs, which provide for base salaries, target cash incentives, benefit plan participation, as well as certain additional benefits, as described below.

We entered into an employment agreement with Dr. Ghosh in connection with his appointment as our Chief Executive Officer in March 2020, which sets forth his initial base salary, target bonus and new hire equity awards as described in the narrative above. In addition, pursuant to the employment agreement, Dr. Ghosh also received a sign-on bonus of $75,000, which was subject to repayment in the event of his termination for cause (as defined in the employment agreement) or resignation for any reason. Dr. Ghosh was also eligible to receive reimbursement of up to $50,000 in relocation expenses, reimbursement of taxes incurred by him with respect to the foregoing and a temporary housing allowance of $3,000 per month for his first year of employment and $2,000 per month for his second year of employment.

Under Dr. Ghosh’s employment agreement, in the event Dr. Ghosh is terminated without cause or resigns for good reason (as defined in the employment agreement), outside of a period of time that begins three months prior to and ends 18 months following a change in control, then Dr. Ghosh will be entitled to receive: (i) continued base salary for 12 months following the date of termination; and (ii) payment or reimbursement of continued healthcare coverage for up to 12 months following the date of termination, in each case, subject to his timely execution and delivery of a release of claims against the Company. In the event Dr. Ghosh is terminated without cause or resigns for good reason, during a period of time that begins three months prior to and ends 18 months following a change in control, Dr. Ghosh will be eligible to receive: (i) a lump sum severance payment equal to 1.5 times the sum of his base salary and target annual incentive payment; (ii) payment or reimbursement of continued healthcare coverage for up to 18 months following the date of termination; and (iii) the full accelerated vesting of his outstanding equity awards, in each case, subject to his timely execution and delivery of a release of claims against the Company.

In addition, in the event of a change in control, each of Dr. Ghosh’s equity awards will vest as to 50% of the then-unvested shares underlying the equity award and the remaining shares underlying the equity award will vest in substantially equal monthly installments over the 12 months immediately following the change in control, subject to Dr. Ghosh’s continued service to the Company or its successor through the applicable vesting date and subject to accelerated vesting as described above.

The employment agreement with Dr. Ghosh includes a “best pay” provision, pursuant to which, in the event any payment or benefit Dr. Ghosh would receive pursuant to the agreement or otherwise would be subject to an excise tax under Section 4999 of the Code, Dr. Ghosh would receive the greater of (i) the full amount of such payments and benefits or (ii) a reduced amount such that no portion is subject to an excise tax under Section 4999 of the Code, whichever is more favorable to Dr. Ghosh on an after-tax basis.

Pursuant to Mr. Leonard’s employment agreement, which was in effect during 2020 prior to his resignation as our Chief Executive Officer, in the event of a change in control of the Company, Mr. Leonard’s options outstanding as of the effective date of the employment agreement would vest except as to the lesser of (i) 6/48ths of the original

number of shares underlying the option or (ii) the remaining unvested shares underlying the options, and any then unvested shares would convert to a time-based option which would vest in substantially equal installments on each of the first six monthly anniversaries of the change in control, subject to Mr. Leonard’s continued service through the applicable vesting date. All equity awards granted to Mr. Leonard after the effective date of the employment agreement (including any performance awards to the extent then-unvested based on the change in control price) would vest as to 50% of the then-unvested shares subject thereto, and the remaining unvested shares would convert to a time-based equity award which would vest in substantially equal installments on each of the first twelve monthly anniversaries of the change in control, subject to Mr. Leonard’s continued service through the applicable vesting date.

In addition, Mr. Leonard’s employment agreement provided that in the event he was terminated by the Company without “cause” or resigned for “good reason” (each, as defined in the employment agreement) outside of a period of time that begins three months prior to and ends 18 months following a change in control, then Mr. Leonard would be entitled to receive: (i) continued base salary for 12 months following the date of termination; (ii) payment or reimbursement of continued healthcare coverage for up to 12 months following the date of termination; and (iii) 12 months’ accelerated vesting of his equity awards, subject to his execution and delivery of a release of claims against the Company. In the event Mr. Leonard was terminated without cause or resigned for good reason, during a period of time that began three months prior to and ended 18 months following a change in control, Mr. Leonard would be eligible to receive: (i) a lump sum severance payment equal to his annual base salary and target annual incentive payment; (ii) payment or reimbursement of continued healthcare coverage for up to 12 months following the date of termination; and (iii) full acceleration of his equity awards, subject to his execution and delivery of a release of claims against the Company.

The employment agreement with Mr. Leonard included a “best pay” provision, pursuant to which, in the event any payment or benefit Mr. Leonard would receive pursuant to the agreement or otherwise would be subject to an excise tax under Section 4999 of the Code, Mr. Leonard would receive the greater of (i) the full amount of such payments and benefits or (ii) a reduced amount such that no portion is subject to an excise tax under Section 4999 of the Code, whichever is more favorable to Mr. Leonard on an after-tax basis.

Effective March 30, 2020, Mr. Leonard stepped down as our Chief Executive Officer, but continued his service as Chairman of the Board. In connection with such transition, Mr. Leonard’s compensation was modified as described above under “Director Compensation”.

We entered into an employment agreement with Ms. Sullivan in connection with her appointment as our interim Chief Financial Officer in August 2020, which sets forth her initial base salary, target bonus and new hire equity awards as described in the narrative above. Ms. Sullivan’s employment agreement was amended and restated in September 2020 to provide for the severance payments and benefits described below. On January 29, 2021, the Board appointed Ms. Sullivan as the Head of Corporate Development.

Under Ms. Sullivan’s amended and restated employment agreement, in the event Ms. Sullivan is terminated without cause or resigns for good reason (as defined in the employment agreement), outside of a period of time that begins three months prior to and ends 18 months following a change in control, then Ms. Sullivan will be entitled to receive: (i) continued base salary for nine months following the date of termination; and (ii) payment or reimbursement of continued healthcare coverage for up to nine months following the date of termination, in each case, subject to her timely execution and delivery of a release of claims against the Company. In the event Ms. Sullivan is terminated without cause or resigns for good reason, during a period of time that begins three months prior to and ends 18 months following a change in control, Ms. Sullivan will be eligible to receive: (i) a lump sum severance payment equal to the sum of her base salary and target annual incentive payment; (ii) payment or reimbursement of continued healthcare coverage for up to 12 months following the date of termination; and (iii) the full accelerated vesting of his outstanding equity awards, in each case, subject to his timely execution and delivery of a release of claims against the Company.

The amended and restated employment agreement with Ms. Sullivan includes a “best pay” provision, pursuant to which, in the event any payment or benefit Ms. Sullivan would receive pursuant to the agreement or otherwise would be subject to an excise tax under Section 4999 of the Code, Ms. Sullivan would receive the greater of (i) the full amount of such payments and benefits or (ii) a reduced amount such that no portion is subject to an excise tax under Section 4999 of the Code, whichever is more favorable to Ms. Sullivan on an after-tax basis.

Pursuant to the employment agreement in effect as of the beginning of 2020 with Dr. Dananberg, in the event of a change in control of the Company, the Dr. Dananberg’s equity awards (including any performance awards to the extent then-unvested based on the change in control price) will vest as to 50% of the then-unvested shares subject thereto, and the remaining unvested shares will convert to a time-based equity award which will vest in substantially equal installments on each of the first twelve monthly anniversaries of the change in control, subject to Dr. Dananberg’s continued service through the applicable vesting date. In addition, in the event of a termination without “cause” or resignation for “good reason” (each, as defined in the employment agreements), in either case, that occurs within the period beginning three months prior to and ending 18 months following a change in control, subject to his execution and delivery of a release of claims against the Company, Dr. Dananberg would be eligible to receive: (i) an amount equal to 0.75 times the sum of the executive’s annual base salary and target incentive payment, payable in a lump sum; (ii) payment or reimbursement of continued healthcare coverage for up to nine months following the date of termination; and (iii) full acceleration of his equity awards.

The employment agreement includes a “best pay” provision, pursuant to which, in the event any payment or benefit Dr. Dananberg would receive pursuant to the agreement or otherwise would be subject to an excise tax under Section 4999 of the Code, Dr. Dananberg will receive the greater of (i) the full amount of such payments and benefits or (ii) a reduced amount such that no portion is subject to an excise tax under Section 4999 of the Code, whichever is more favorable to Dr. Dananberg on an after-tax basis.

In March 2020, Dr. Dananberg’s employment agreement was amended to provide for the same severance benefits as described above for Ms. Sullivan. Dr. Dananberg remains eligible to receive the same vesting acceleration benefits described above under his amended employment agreement.

Consistent with the SEC’s disclosure requirements, we have assessed our compensation programs for all employees. We have concluded that our compensation policies and practices do not create risks that are reasonably likely to have a material adverse effect on us. Management has evaluated our executive and employee compensation and benefits programs to determine if these programs’ provisions and operations create undesired or unintentional risk of a material nature. The risk assessment process includes a review of program policies and practices; analysis to identify risks and risk controls related to our compensation programs; and determinations as to the sufficiency of risk identification, the balance of potential risk to potential reward, the effectiveness of our risk controls and the impacts of our compensation programs and their risks to our strategy. Although we periodically review all compensation programs, we focus on the programs with variability of payout, with the ability of a participant to directly affect payout and the controls on participant action and payout. In relation to this, we believe that our incentive compensation arrangements provide incentives that do not encourage risk taking beyond our ability to effectively identify and manage significant risks and are compatible with effective internal controls and our risk management practices.

The Compensation Committee monitors our compensation programs on an annual basis and expects to make modifications as necessary to address any changes in our business or risk profile.

The following table provides certain information as of December 31, 2020, with respect to all of our equity compensation plans in effect on that date.

In March 2020, our board of directors adopted our 2020 Plan. Awards granted under the 2020 Plan are intended to constitute “employment inducement awards” under Nasdaq Listing Rule 5635(c)(4) and therefore, the 2020 Plan is intended to be exempt from the Nasdaq Listing Rules regarding stockholder approval of stock option and stock purchase plans. A total of 2,600,000 shares of our common stock are authorized for issuance under the 2020 Plan. The 2020 Plan provides for the grant of non-qualified stock options, stock appreciation rights, restricted stock, restricted stock units, performance bonus awards, performance stock units, dividend equivalents or other stock-based and cash-based awards. These awards may be granted to individuals who are new employees or are commencing employment with us or one of our subsidiaries following a bona fide period of non-employment with us, and for whom such awards are granted as a material inducement to commencing employment with us or one of our subsidiaries.

The 2020 Plan is administered by the Board or the compensation committee. In the event of a change in control in which the successor corporation refuses to assume or substitute any outstanding award under the 2020 Plan, the awards will vest in full. The Board may amend, suspend or terminate the 2020 Plan at any time, provided that no amendment requiring stockholder approval to comply with applicable law will be effective unless approved by the Board and no amendment may materially and adversely affect any outstanding award without the consent of the holder.

The following table presents information as to the beneficial ownership of our common stock as of April 26, 2021 for:

Beneficial ownership is determined in accordance with the rules of the SEC and generally includes voting or investment power with respect to securities. Unless otherwise indicated below, to our knowledge, the persons and entities named in the table have sole voting and sole investment power with respect to all shares beneficially owned, subject to community property laws where applicable. Shares of our common stock subject to options that are currently exercisable or exercisable within 60 days of April 26, 2021 are deemed to be outstanding and to be beneficially owned by the person holding the stock options for the purpose of computing the percentage ownership of that person, but are not treated as outstanding for the purpose of computing the percentage ownership of any other person.

Percentage ownership of our common stock in the table is based on 54,787,709 shares of our common stock issued and outstanding on April 26, 2021. This table is based upon information supplied by officers, directors, and principal stockholders and Schedules 13D and Schedules 13G, if any, filed with the SEC. Unless otherwise indicated, the address of each of the individuals and entities named below is c/o Unity Biotechnology, Inc., 285 East Grand Ave., South San Francisco, CA 94080.

Section 16(a) of the Exchange Act requires the Company’s directors and executive officers, and persons who own more than 10% of a registered class of the Company’s equity securities, to file with the SEC initial reports of ownership and reports of changes in ownership of common stock and other equity securities of the Company. Officers, directors, and greater than 10% stockholders are required by SEC regulations to furnish the Company with copies of all Section 16(a) forms they file.

To the Company’s knowledge, based solely on a review of the copies of such reports furnished to the Company and written representations that no other reports were required, the Company believes that all Section 16(a) filing requirements applicable to our officers, directors and greater than 10% beneficial owners were complied with during the year ended December 31, 2020.

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

Brokers with account holders who are Unity stockholders may be “householding” our proxy materials. A single proxy statement may 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 it will be “householding” communications to your address, “householding” will continue until you are notified otherwise or until you notify your broker or the Company that you no longer wish to participate in “householding.”

If, at any time, you no longer wish to participate in “householding” and would prefer to receive a separate proxy statement and annual report, you may (1) notify your broker, (2) direct your written request to: Unity Biotechnology, Inc., 285 East Grand Ave., South San Francisco, CA 94080 or (3) request from the Company by calling (650) 416-1192. Stockholders who currently receive multiple copies of this Proxy Statement at their address and would like to request “householding” of their communications should contact their broker. In addition, the Company will promptly deliver, upon written or oral request to the address or telephone number above, a separate copy of the Form 10-K, Proxy Statement, Proxy Card, or Notice of Internet Availability of Proxy Materials to a stockholder at a shared address to which a single copy of the documents was delivered.

As of the date of this Proxy Statement, the Board does not intend to present any matters other than those described herein at the Annual Meeting and is unaware of any matters to be presented by other parties. If other matters are properly brought before the Annual Meeting for action by the stockholders, proxies will be voted in accordance with the recommendation of the Board or, in the absence of such a recommendation, in the discretion of the proxy holder.

We have filed our Annual Report on Form 10-K for the year ended December 31, 2020 with the SEC. It is available free of charge at the SEC’s web site at www.sec.gov. Upon written request by a Unity stockholder, we will mail without charge a copy of our Annual Report on Form 10-K, including the financial statements and financial statement schedules, but excluding exhibits to the Annual Report on Form 10-K. Exhibits to the Annual Report on Form 10-K are available upon payment of a reasonable fee, which is limited to our expenses in furnishing the requested exhibit. All requests should be directed to the Corporate Secretary, Unity Biotechnology, Inc., 285 East Grand Ave., South San Francisco, CA 94080.