UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of the

Securities Exchange Act of 1934

Filed by the Registrant  ☒                             Filed by a Party other than the Registrant  ☐

Check the appropriate box:

Larimar Therapeutics, Inc.

(Name of Registrant as Specified in Its Charter)

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

Payment of Filing Fee (Check all boxes that apply):

Three Bala Plaza East, Suite 506

Bala Cynwyd, PA 19004

2022 ANNUAL MEETING OF STOCKHOLDERS

To be Held on May 10, 2022

April 12, 2022

Dear Stockholders:

We are pleased to invite you to attend the 2022 Annual Meeting of Stockholders of Larimar Therapeutics, Inc. (the “Annual Meeting”), which will be held at 9:30 a.m., Eastern Time, on Tuesday, May 10, 2022. The Annual Meeting will be held in a virtual meeting format only. You will not be able to attend the Annual Meeting physically. We believe that the virtual meeting format enables stockholders to attend and participate from any location around the world at no cost, provides for cost savings to Larimar Therapeutics, Inc. (the “Company”) and our stockholders and reduces the environmental impact of our Annual Meeting. The Annual Meeting can be accessed via the Internet at: meetnow.global/MYGPWRJ.

Details regarding the business to be conducted at the Annual Meeting are more fully described in the accompanying Notice of 2022 Annual Meeting of Stockholders (the “Notice”) and 2022 Annual Meeting Proxy Statement (the “Proxy Statement”). Other than the proposals described in the Proxy Statement, the Board of Directors is not aware of any other matters to be presented for a vote at the Annual Meeting.

Your vote is important. Whether or not you plan to virtually attend the Annual Meeting, we encourage you to vote as soon as possible to ensure that your shares are represented. Information about voting methods is set forth in the accompanying Notice and Proxy Statement.

If you have any questions with respect to voting, please call our Chief Financial Officer and Secretary, Michael Celano, at 484-414-2715.

Thank you for your continued confidence in our Company. We look forward to your participation at the meeting.

Sincerely,

THIS PROXY STATEMENT AND ENCLOSED PROXY CARD ARE

FIRST BEING MAILED ON OR ABOUT APRIL 12, 2022.

NOTICE OF 2022 ANNUAL MEETING OF STOCKHOLDERS

To be Held on May 10, 2022

Dear Stockholders:

NOTICE IS HEREBY GIVEN that the 2022 Annual Meeting of Stockholders of Larimar Therapeutics, Inc. (the “Annual Meeting”) will be held on Tuesday, May 10, 2022, at 9:30 a.m. Eastern Time. The safety of our stockholders is important to us and given the continuing public health concerns regarding the ongoing and evolving COVID-19 pandemic, the Annual Meeting will again be held in a virtual meeting format only. We are holding the meeting for the purpose of considering and acting upon:

The foregoing items of business are more fully described in the Proxy Statement accompanying this Notice of 2022 Annual Meeting of Stockholders (the “Notice”).

MEETING INFORMATION

Your vote matters. Whether or not you plan to virtually attend the Annual Meeting, please ensure that your shares are represented by voting, signing, dating, and returning your proxy in the enclosed envelope, which requires no postage if mailed in the United States.

Thank you for your ongoing support of and interest in Larimar Therapeutics, Inc.

By Order of the Board of Directors,

Michael Celano

Chief Financial Officer and Secretary

April 12, 2022

IMPORTANT NOTICE REGARDING AVAILABILITY OF PROXY MATERIALS. This Proxy Statement and the proxy card are being mailed to our stockholders on or about April 12, 2022. In accordance with the rules of the Securities and Exchange Commission, we are advising our stockholders of the availability on the Internet of our proxy materials related to our forthcoming Annual Meeting. Because we have elected to utilize the “full set delivery” option, we are delivering to all stockholders paper copies of all of the proxy materials, as well as providing access to those proxy materials on a publicly accessible website. This Proxy Statement and our Annual Report on Form 10-K for the fiscal year ended December 31, 2021 are available to beneficial holders of our common stock at http://www.edocumentview.com/LRMR and to record holders of our common stock at http://www.envisionreports.com/LRMR.

To assist you in reviewing this year’s proposals, we call your attention to the following proxy summary. This summary highlights information contained elsewhere in this Proxy Statement and our Annual Report on Form 10-K for the fiscal year ended December 31, 2021 (the “2021 Annual Report”). This summary does not contain all of the information you should consider, and we encourage you to read this Proxy Statement and the 2021 Annual Report carefully before voting.

2022 Annual Meeting of Stockholders

Summary of Stockholder Voting Matters

Our Director Nominees

You are being asked to vote on the election of Thomas E. Hamilton as a Class II director, to serve for a three-year term expiring at our 2025 Annual Meeting of Stockholders. Thomas O. Daniel, M.D. currently serves as a Class II director of our Board of Directors (the “Board”) with a term expiring at the Annual Meeting. Dr. Daniel’s service as a member of our Board will end effective as of the date of the Annual Meeting and he is not standing for re-election. After careful consideration, we have elected to reduce the size of our Board from seven to six directors, effective as of the date of the Annual Meeting. Our Board is divided into three classes, each of which has a three-year term. Classes I and II each consist of two directors, with Class II being reduced to one director following the Annual Meeting, and Class III consists of three directors.

The term of office of our Class II directors expires at the Annual Meeting. We are nominating Thomas E. Hamilton for re-election at the Annual Meeting to serve until the 2025 Annual Meeting of Stockholders and until his successor, if any, is duly elected and qualified or appointed, or until his earlier death, resignation or removal. Directors are elected by a plurality of the votes cast by our stockholders at the Annual Meeting. The nominee

receiving the most FOR votes (among votes properly cast online during the Annual Meeting or by proxy) will be elected. If no contrary indication is made, shares represented by executed proxies will be voted FOR the election of Mr. Hamilton. The nominee has agreed to serve as a director if elected, and we have no reason to believe that he will be unable to serve.

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CORPORATE GOVERNANCE HIGHLIGHTS

The following table summarizes our current Board structure and key elements of our corporate governance framework:

RECENT CORPORATE HIGHLIGHTS

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PROXY STATEMENT

This Proxy Statement, with the enclosed proxy card, is being furnished to stockholders of the Company in connection with the solicitation by our Board of proxies to be voted at our Annual Meeting and at any postponements or adjournments thereof. The Annual Meeting will be held on Tuesday, May 10, 2022, at 9:30 a.m., Eastern Time via the Internet at meetnow.global/MYGPWRJ.

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EXPLANATORY NOTE

On May 28, 2020, Larimar Therapeutics, Inc. (the “Company”), formerly known as Zafgen, Inc., completed a business combination with Chondrial Therapeutics, Inc. (“Chondrial”), in accordance with the terms of the Agreement and Plan of Merger, dated as of December 17, 2019, as amended, by and among the Company, Chondrial, a wholly-owned subsidiary of the Company (“Merger Sub”) and Chondrial Holdings, LLC, the sole stockholder of Chondrial, pursuant to which Merger Sub merged with and into Chondrial, with Chondrial surviving as a wholly-owned subsidiary of the Company (the “Merger”). In connection with the Merger, the board of directors prior to the Merger was replaced by new directors designated by both Chondrial and Zafgen, and members of Chondrial’s management team were installed as our new management team. In connection with, and immediately prior to the completion of the Merger, we effected a reverse stock split of our common stock, at a ratio of 1-for-12.

Immediately after the completion of the Merger, we changed our name from “Zafgen, Inc.” to “Larimar Therapeutics, Inc.” and the business conducted by us became the business conducted by Chondrial.

We are a clinical-stage biotechnology company focused on developing treatments for complex rare diseases, and our common stock began trading on Nasdaq Global Market under the ticker symbol “LRMR.” Unless otherwise indicated, all references in this Proxy Statement to “Larimar,” “Company,” “we,” “our,” and “us” refer to Larimar Therapeutics, Inc. as of and following the closing of the Merger, and all references to “Zafgen” refer to Zafgen, Inc. and the business of Zafgen, Inc. prior to the closing of the Merger.

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ATTENDING THE ANNUAL MEETING

The Annual Meeting will be a completely virtual meeting. There will be no physical meeting location. The meeting will only be conducted via live webcast. We have adopted a virtual format for the Annual Meeting to make participation accessible for stockholders from any geographic location with Internet connectivity. We have worked to offer the same participation opportunities as would be provided at an in-person meeting while further enhancing the online experience available to all stockholders regardless of their location.

To participate in the virtual meeting, visit meetnow.global/MYGPWRJ. You will need to enter the 16-digit control number included on your Notice or on your proxy card. The meeting will begin promptly at 9:30 a.m., Eastern Time on Tuesday, May 10, 2022. We encourage you to access the meeting prior to the start time leaving ample time for the check in.

If your shares are held in “street name,” you should contact your bank or broker to obtain your 16-digit control number or otherwise vote through the bank or broker. If you lose your 16-digit control number, you may join the Annual Meeting as a “Guest” but you will not be able to vote, ask questions or access the list of stockholders as of the Record Date.

The virtual meeting platform is fully supported across browsers (Internet Explorer, Firefox, Chrome and Safari) and devices (desktops, laptops, tablets and cell phones) running the most updated version of applicable software and plugins. Participants should ensure that they have a strong WiFi connection wherever they intend to participate in the meeting. Participants should also give themselves plenty of time to log in prior to the start of the meeting.

PROXY SOLICITATION

Our Board is soliciting your vote on matters that will be presented at the Annual Meeting and at any adjournment or postponement thereof. This Proxy Statement contains information on these matters to assist you in voting your shares.

This Proxy Statement and the proxy card are first being mailed to our stockholders on or about April 12, 2022. In accordance with the rules of the Securities and Exchange Commission (the “SEC”), we are advising our stockholders of the availability on the Internet of our proxy materials related to our forthcoming Annual Meeting. Because we have elected to utilize the “full set delivery” option, we are delivering to all stockholders paper copies of all of the proxy materials, as well as providing access to those proxy materials on a publicly accessible website. This Proxy Statement and our 2021 Annual Report are available to beneficial holders of our common stock at http://www.edocumentview.com/LRMR and to record holders of our common stock at http://www.envisionreports.com/LRMR.

STOCKHOLDERS ENTITLED TO VOTE

All stockholders of record of our common stock at the close of business on April 4, 2022 (the “Record Date”) are entitled to receive the Notice and to vote their shares at the Annual Meeting. As of the Record Date, 17,710,450 shares of our common stock were outstanding. Each share is entitled to one vote on each matter properly brought to the meeting.

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VOTING METHODS

You may cast your vote in any of the following ways:

HOW YOUR SHARES WILL BE VOTED

In each case, your shares will be voted as you instruct. If you return a signed card, but do not provide voting instructions, your shares will be voted FOR each of the proposals. If you are the record holder of your shares, you may revoke or change your vote any time before the proxy is exercised. To do so, you must do one of the following:

If your shares are held by your broker, bank or other holder of record as a nominee or agent (i.e., the shares are held in “street name”), and you wish to vote at the Annual Meeting, you should follow the instructions provided by your broker, bank or other holder of record in order to obtain a proxy form from the institution that holds your shares.

Deadline for Voting. The deadline for voting by telephone or Internet, other than by virtually attending the Annual Meeting, is 11:59 p.m. Eastern Time on May 9, 2022. If you are a registered stockholder and virtually attend the Annual Meeting, you may deliver your vote online during the Annual Meeting.

BROKER VOTING AND VOTES REQUIRED FOR EACH PROPOSAL

If your shares are held in a stock brokerage account or by a bank or other holder of record, you are considered the “beneficial owner” of shares held in street name. The Notice has been forwarded to you by your broker, bank or other holder of record who is considered the stockholder of record of those shares. As the beneficial owner, you may direct your broker, bank or other holder of record on how to vote your shares by using the proxy card included in the materials made available or by following their instructions for voting on the Internet.

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A broker non-vote occurs when a broker or other nominee that holds shares for another does not vote on a particular item because the nominee does not have discretionary voting authority for that item and has not received instructions from the beneficial owner of the shares. The following table summarizes how broker non-votes and abstentions are treated with respect to our proposals:

QUORUM

We must have a quorum to conduct business at the Annual Meeting. A quorum consists of the presence at the Annual Meeting, either attending the meeting virtually or represented by proxy, of the holders of a majority of the outstanding shares of our common stock entitled to vote. For the purpose of establishing a quorum, abstentions, including brokers holding customers’ shares of record who cause abstentions to be recorded at the meeting, and broker non-votes are considered stockholders who are present and entitled to vote, and count toward the quorum. If there is no quorum, the holders of a majority of shares virtually attending the Annual Meeting or represented by proxy or the presiding officer of the meeting may adjourn the Annual Meeting to another date.

PROXY SOLICITATION COSTS

We pay the cost of soliciting proxies. Proxies will be solicited on behalf of the Board by mail, telephone, and other electronic means or in person. Directors and employees will not be paid any additional compensation for soliciting proxies. We may reimburse brokerage firms, banks and other agents for the cost of forwarding proxy materials to beneficial owners.

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Our Board has nominated Thomas E. Hamilton for re-election as a Class II director at our Annual Meeting to hold office until our 2025 Annual Meeting of Stockholders.

Our Board is the Company’s ultimate decision-making body, except with respect to those matters reserved to the stockholders. Our Board selects the members of our senior management team, who in turn are responsible for the day-to-day operations of the Company. Our Board acts as an advisor and counselor to senior management and oversees its performance.

Our Board is divided into three classes, with each class holding office for a three-year term. Thomas E. Hamilton, a current Class II director, has been nominated by our Board for re-election at the Annual Meeting for a three-year term that will expire at our 2025 Annual Meeting of Stockholders and until his successor, if any, is elected or appointed, or his earlier death, resignation, or removal. Mr. Hamilton has agreed to be named and to serve, and we expect him to be able to serve if elected. If Mr. Hamilton is unable to serve, the Nominating and Corporate Governance Committee will recommend to our Board a replacement nominee. The Board may then designate the other nominee to stand for election. If you voted for the unavailable nominee, your vote will be cast for his replacement.

Thomas O. Daniel, M.D. currently serves as a Class II director of our Board with a term expiring at the Annual Meeting. Dr. Daniel’s service as a member of our Board will end effective as of the date of the Annual Meeting and he is not standing for re-election. After careful consideration, we have elected to reduce the size of our Board from seven to six directors, effective as of the date of the Annual Meeting.

BOARD STRUCTURE AND COMPOSITION

The Nominating and Corporate Governance Committee is responsible for recommending the composition and structure of our Board and for developing criteria for Board membership. The Nominating and Corporate Governance Committee regularly reviews director competencies, qualities, and experiences, with the goal of ensuring that our Board is comprised of an effective team of directors who function collegially and who can apply their experience toward meaningful contributions to our business strategy and oversight of our performance, risk management, organizational development and succession planning.

Our Amended and Restated Bylaws (the “Bylaws”) provide that the number of members of our Board shall be fixed by the Board from time to time. Our Board is currently fixed at seven members. However, as described above, after careful consideration we have elected to reduce the size of our Board from seven to six directors following Dr. Daniel’s departure from our Board, effective as of the date of the Annual Meeting. Our Board is divided into three classes with staggered three-year terms. The Nominating and Corporate Governance Committee is responsible for identifying individuals that it believes are qualified to become Board members.

CRITERIA FOR BOARD MEMBERSHIP

The Nominating and Corporate Governance Committee considers certain criteria in identifying director nominees. Important general criteria and considerations for Board membership include:

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The Nominating and Corporate Governance Committee also considers, on an ongoing basis, the background, experience and skills of the incumbent directors that are important to our current and future business needs, including, among others, the combined mix of experience in the following areas: finance, executive and management, the formation and development of start-up companies in the life sciences industry, public company governance and management and biopharmaceutical product development.

In recruiting and selecting Board candidates, the Nominating and Corporate Governance Committee considers the size of the Board and the skills of the candidates. The Nominating and Corporate Governance Committee reviews the professional experience and qualifications of each Board member and candidate to determine whether a particular Board member or candidate possesses the necessary skills and/or other attributes to qualify him or her for service on a particular committee. The Nominating and Corporate Governance Committee also considers a wide range of additional factors including other positions the director or candidate holds, including other boards of directors on which he or she serves, and the independence of each director and candidate, to ensure that a substantial majority of the Board is independent. While the Company does not have a formal policy on Board diversity, the Nominating and Corporate Governance Committee considers the value of diversity on the Board in evaluating director nominees. Accordingly, the Nominating and Corporate Governance Committee’s evaluation of director nominees includes consideration of their ability to contribute to the diversity of personal and professional experiences, opinions, perspectives, and backgrounds on the Board.

Potential Director Candidates

On an ongoing basis, the Nominating and Corporate Governance Committee considers potential director candidates identified on its own initiative, as well as candidates referred or recommended to it by other directors, members of management, search firms, stockholders and others (including individuals seeking to join the Board). Stockholders who wish to recommend candidates may contact the Nominating and Corporate Governance Committee in the manner described in “Stockholder Communications to the Board.” Stockholder nominations must be made according to the procedures required under our Bylaws and described in this Proxy Statement under the heading “Requirements for Submission of Stockholder Proposals for Next Year’s Annual Meeting.” Stockholder-recommended candidates and stockholder nominees whose nominations comply with these procedures and who meet the criteria referred to above will be evaluated by the Nominating and Corporate Governance Committee in the same manner as the Nominating and Corporate Governance Committee’s nominees.

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BOARD DIVERSITY

Board diversity and inclusion is critical to the success of our Company. While we do not have a formal policy on Board diversity, the Board is committed to building a Board that consists of the optimal mix of skills, expertise, and diversity so that the Board is capable of effectively overseeing the execution of our business and meeting the Company’s evolving needs, with diversity reflecting gender, age, race, ethnicity, background, professional experience and perspectives. The Nominating and Corporate Governance Committee considers the value of diversity on the Board in evaluating director candidates. Accordingly, the Nominating and Corporate Governance Committee’s evaluation of director nominees includes consideration of their ability to contribute to the diversity of personal and professional experiences, opinions, perspectives and backgrounds on the Board.

As presently constituted, the Board represents a deliberate mix of members who have a deep understanding of our business as well as members who have different skill sets and points of view. The matrix below summarizes the self-identified gender and demographic background statistics for our Board. Each of the categories listed in the matrix below has the meaning given to it in Nasdaq Listing Rule 5605(f).

BOARD OVERSIGHT OF COMPANY CULTURE AND ENVIRONMENTAL, SOCIAL AND GOVERNANCE HIGHLIGHTS

Our Board is committed to fostering a strong culture of compliance and ethical conduct and has structured its committees and their activities to support its commitment. Our Board supports management’s promotion of a corporate culture of integrity, ethical behavior and compliance with laws and regulations and for ensuring that the Company’s culture and its strategy are aligned. Our Board expects all directors, as well as officers and employees, to conduct themselves in a manner consistent with our Code of Business Conduct and Ethics (the “Code of Conduct”) and our values. Our Board believes that a strong culture of integrity, ethics and compliance is fundamental to the conduct of the Company’s business, and is necessary for effective risk management, maintaining investor trust, and successful corporate governance.

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We believe corporate responsibility is essential for good governance because it strengthens the accountability of our Board and management team. We view Environmental, Social and Governance (“ESG”) initiatives as long-term value drivers for the Company and our stockholders. Our focus on, and commitment to ESG initiatives, is tied to our belief that achieving and sustaining business excellence goes hand-in-hand with strong corporate leadership and stewardship. Our Board is primarily responsible for overseeing our corporate strategy, which includes the oversight of ESG matters that impact our business and related risks.

The following is a summary of our current ESG policies and practices:

In the director nominee and continuing director biographies that follow, we highlight the specific experience, qualifications, attributes and skills that led the Board to conclude that the director nominee or continuing director should serve on our Board at this time.

DIRECTOR NOMINEE

CLASS II DIRECTOR — PRESENT TERM EXPIRING AT THE ANNUAL MEETING AND PROPOSED TERM TO EXPIRE IN 2025

Thomas E. Hamilton has served as a member of the Board since May 2020. Mr. Hamilton served as the Chairman of the board of directors of Chondrial (the “Chondrial Board”) from Chondrial’s founding in 2013 until May 2020. Since 2013, Mr. Hamilton has served as the managing member of Friedreich’s Ataxia Life Sciences, an early stage biotech investment company focused on bridging the gap to cure Friedreich’s ataxia.

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From 2013 to 2019, Mr. Hamilton served as the president, chief executive officer and owner of Construction Forms, Inc. (“Construction Forms”), an industrial manufacturing company based in Port Washington, Wisconsin. Prior to founding Construction Forms, Mr. Hamilton spent 25 years in several leadership positions in the financial industry. Most recently, Mr. Hamilton served as a Managing Director and Strategic Advisor to the Head of Fixed Income, Currencies and Commodities at Barclays Capital in New York, New York. Prior to Barclays, Mr. Hamilton held various managing director roles at Citigroup, Inc. and Salomon Brothers, Inc., where he began his career. He also serves as a director and executive committee member of the Friedreich’s Ataxia Research Alliance and is the co-founder of his own charitable scientific effort, the CureFA Foundation. Since March 2019, Mr. Hamilton has served as a Director and as a member of the audit committee, risk committee and compensation committee of the board of Annaly Capital Management, Inc., a leading diversified capital manager that invests in and finances residential and commercial assets. Mr. Hamilton holds a B.S. in finance from the University of Dayton.

Skills & Qualifications: Mr. Hamilton’s qualifications to sit on the Board include his extensive experience in the financial industry and leadership in developing a cure for Friedreich’s ataxia, including leadership roles in organizations focused on the development of a cure for Friedreich’s ataxia.

CONTINUING DIRECTORS

CLASS III DIRECTORS — TERMS EXPIRING AT THE 2023 ANNUAL MEETING OF STOCKHOLDERS

Frank E. Thomas has served as a member of the Board since June 2014. Mr. Thomas has been the President and Chief Operating Officer of Orchard Therapeutics plc (“Orchard”), a biotechnology company dedicated to using gene therapy to end the devastation caused by genetic and other severe diseases, since March 2020. Mr. Thomas served as Chief Operating Officer and Chief Financial Officer of Orchard from January 2020 to March 2020 and the Chief Financial Officer and Chief Business Officer of Orchard from January 2018 to December 2019. Prior to joining Orchard, Mr. Thomas served as President and Chief Operating Officer of AMAG Pharmaceuticals, Inc. (“AMAG”), a publicly traded, specialty pharmaceutical company, from April 2015 to April 2017, and previously served as AMAG’s Executive Vice President and Chief Operating Officer from May 2012 through April 2015, and as Executive Vice President, Chief Financial Officer and Treasurer from August 2011 through May 2012. Prior to joining AMAG, he served in various executive roles at public and private biotechnology and medical diagnostics companies, including Molecular Biometrics, Inc., a commercial stage medical diagnostics company, Critical Therapeutics, Inc. (“Critical Therapeutics”), a public biopharmaceutical company, and Esperion Therapeutics, Inc., a publicly traded biopharmaceutical company. His roles at these companies ranged at various times from Chief Executive Officer, Chief Operating Officer and Chief Financial Officer. He also served on the board of directors of Critical Therapeutics. Since July 2017, Mr. Thomas has served on the board of directors of Spero Therapeutics, Inc., a publicly traded biopharmaceutical company. Mr. Thomas was a member of the board of directors of the Massachusetts Biotechnology Council from 2007 to 2015. Mr. Thomas holds a B.B.A. from the University of Michigan, Ann Arbor.

Skills & Qualifications: Mr. Thomas’ qualifications to sit on the Board include his extensive management experience at biopharmaceutical companies and with financial matters, including senior leadership roles at various biopharmaceutical companies.

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Carole S. Ben-Maimon, M.D. has served as a member of the Board since May 2020. Dr. Ben-Maimon has served as the President and Chief Executive Officer of the Company since May 2020. Dr. Ben-Maimon served as Chondrial’s President, Chief Executive Officer and member of the Chondrial Board from December 2016 until May 2020. Prior thereto and from 2014 to 2016, she served as an independent consultant at CSGB Consulting, LLC, where she participated in the evaluation of investment opportunities in the brand and generic industry on behalf of investment firms. Prior thereto, from September 2011 to November 2014, Dr. Ben-Maimon was the President of Global Pharmaceuticals, a subsidiary of Impax Laboratories (“Impax”), which was responsible for Impax’s generic business. Prior to Global Pharmaceuticals, she served as Senior Vice President, Corporate Strategy at Qualitest Pharmaceuticals, Inc. (“Qualitest”) from July 2009 to July 2010. Prior to her role at Qualitest, she served as Founder, President and Chief Executive Officer and director of Alita Pharmaceuticals, Inc., an early stage, privately held specialty pharmaceutical company, from September 2006 to June 2009. Dr. Ben-Maimon also held executive positions with and served as a member of the board with Barr Pharmaceuticals Inc. (“Barr”) from 2001 to 2006, including as President and Chief Operating Officer of Duramed Research, Inc., a wholly-owned subsidiary of Barr, where she led Barr’s branded female healthcare business and also served as a member of its board of directors. Prior to that, from 1993 to 2001, Dr. Ben-Maimon was at Teva Pharmaceutical Industries in various roles, including being responsible for research and development and public policy in North America from 2000 to 2001. Since 2016, Dr. Ben-Maimon has also served as a member of the board of directors and the audit and nominating and corporate governance committees of the board of a publicly-traded pharmaceutical company, Teligent, Inc. Dr. Ben-Maimon also serves on the board of directors of a privately-held pharmaceutical company and on the board of a not-for-profit hospital in Philadelphia, Pennsylvania. Dr. Ben-Maimon received her B.S. from the University of Pennsylvania and her M.D. from Jefferson Medical College. She completed clinical and research training in internal medicine and nephrology at Thomas Jefferson University.

Skills & Qualifications: Dr. Ben-Maimon’s qualifications to sit on the Board include her knowledge of Larimar’s business, as well as her extensive leadership and biopharmaceutical industry experience, including senior leadership roles at publicly-traded life sciences companies.

Joseph Truitt has served as a member of the Board since May 2020. Mr. Truitt currently serves as the Chief Executive Officer of Iecure Inc., a gene editing company, and is on the Board of CodeBio, a gene therapy development company. From May 2020 through December 2020, Mr. Truitt served as Chief Executive Officer of BioSpecifics Technologies Corp. (“BioSpecifics”), a biopharmaceutical company that develops collagenase-based therapies, which was acquired by Endo International plc in December 2020. From May 2018 until April 2020, Mr. Truitt served as President, Chief Executive Officer and member of the board of directors of Achillion Pharmaceuticals, Inc. (“Achillion”), a publicly-traded clinical-stage biopharmaceutical company developing small molecule drug therapies for immune system disorders, which was acquired by Alexion Pharmaceuticals, a global biopharmaceutical company, in January 2020. Prior to his appointment to the offices or President and Chief Executive Officer in 2018, Mr. Truitt served in a number of various positions at Achillion, including: Executive Vice President, Chief Operations Officer, from September 2017 until May 2018; Executive Vice President, Chief Commercial Officer, from March 2014 until September 2017; and Senior Vice President, Business Development and Chief Commercial Officer, from January 2009 until March 2014. Before joining Achillion, from July 2006 to December 2008, Mr. Truitt served as Vice President, Business Development and

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Product Strategy of Lev Pharmaceuticals, Inc. and, from 2000 to 2006, he served as Vice President, Sales and Operations of Johnson & Johnson—OraPharma, Inc. Prior to this, be spent nine years at TAP Pharmaceuticals Inc. in a variety of sales and marketing roles before a two-year role as a consultant at IMS Health. Mr. Truitt received his B.S. in Marketing from LaSalle University and his M.B.A. from St. Joseph’s University in Pharmaceutical Marketing. Mr. Truitt previously was a Captain in the United States Marine Corps.

Skills & Qualifications: Mr. Truitt’s qualifications to sit on the Board include extensive management experience, his prior experience as a public company director and his deep knowledge of the biopharmaceutical business.

CLASS I DIRECTORS — TERMS EXPIRING AT THE 2024 ANNUAL MEETING OF STOCKHOLDERS

Jonathan Leff has served as a member of the Board since May 2020. Mr. Leff served as a member of the Chondrial Board from December 2016 until May 2020. Mr. Leff is a partner at Deerfield Management Company, L.P. and Chairman of the Deerfield Institute. He joined Deerfield in 2013 and focuses on venture capital and structured investments in biotechnology and pharmaceuticals. Prior thereto, Mr. Leff served as Managing Director at Warburg Pincus LLC from 2000 to 2012, where he led the firm’s investment efforts in biotechnology and pharmaceuticals. Mr. Leff also previously served as a member of the Executive Committee of the Board of the National Venture Capital Association (“NVCA”) and led NVCA’s life sciences industry efforts as Chair of NVCA’s Medical Innovation and Competitiveness Coalition. He also served on the Emerging Companies Section Board of the Biotechnology Industry Organization. Mr. Leff is a board member of several not-for-profit organizations, including the Spinal Muscular Atrophy Foundation, Reagan-Udall Foundation and the Columbia University Medical Center Board of Advisors. He also previously served on the boards of several other publicly-traded biotechnology and pharmaceutical companies, including Proteon Therapeutics, Inc. from 2017 to 2019, AveXis, Inc. from 2014 to 2017 and Nivalis Therapeutics, Inc. from 2014 to 2016. Mr. Leff currently also serves on the boards of several private biopharmaceutical companies and has previously served on the boards of other privately held biopharmaceutical companies. Mr. Leff received his A.B. from Harvard University, M.B.A. from the Stanford University Graduate School of Business and M.S. in Biotechnology from Johns Hopkins University.

Skills & Qualifications: Mr. Leff’s qualifications to sit on the Board include his extensive leadership, executive, managerial and business experience with life sciences companies, including experience in the investment, development and sale of multiple companies in the life sciences sector.

Peter Barrett, Ph.D. has served as a member of the Board since August 2006 and served as the Chairman of the Board from August 2006 until May 2018. Dr. Barrett joined Atlas Venture, an early-stage venture capital fund, in 2002, and currently serves as a Partner in the Life Sciences Group. Previously, from 1998 to 2002, he was a Co-Founder, Executive Vice President and Chief Business Officer of Celera Genomics (“Celera”). Prior to Celera, from 1979 to 1998, Dr. Barrett held senior management positions at PerkinElmer, Inc., most recently

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serving as Vice President, Corporate Planning and Business Development. Dr. Barrett currently serves on the board of directors of PerkinElmer, Inc. and Synlogic, Inc., and several other privately held companies. Dr. Barrett is a Senior Fellow at Harvard Business School and is the Faculty Chair of the Key Advisory Board of the Blavatnik Fellowship Program. Dr. Barrett holds a B.S. in chemistry from Lowell Technological Institute (now known as the University of Massachusetts, Lowell) and a Ph.D. in analytical chemistry from Northeastern University. He also completed Harvard Business School’s Management Development Program.

Skills & Qualifications: Dr. Barrett’s qualifications to sit on the Board include his extensive leadership, executive, managerial and business experience with life sciences companies, including experience in the formation, development and business strategy of multiple start-up companies in the life sciences sector.

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We are committed to good corporate governance and integrity in our business dealings. We believe that strong corporate governance practices that provide meaningful rights to our stockholders and ensure Board and management accountability are key to our relationship with our stockholders. We strive to have regular, constructive conversations with our stockholders to better understand our stockholders’ priorities and perspectives.

Our governance practices are documented in our Ninth Amended and Restated Certificate of Incorporation, as amended (the “Certificate”), our Bylaws, our Code of Conduct, our Corporate Governance Guidelines and the charters of the committees of the Board (the “Committees”). Aspects of our governance documents are summarized below. You can find our charters for each Committee and our Code of Conduct on our website at www.larimartx.com under “Investors—Corporate Governance.”

BOARD INDEPENDENCE

Our Board has determined that each of our directors, with the exception of Dr. Ben-Maimon, are “independent” directors, as defined under the rules of Nasdaq. In making such determination, the Board considered the relationships that each such non-employee director has with the Company and all other facts and circumstances that the Board deemed relevant in determining their independence, including the beneficial ownership of our common stock by each non-employee director. In considering the independence of the directors listed above, the Board also considered the association of each non-employee director with the holders of more than 5% of our common stock. Our independent directors generally meet in executive session at each regularly scheduled Board meeting.

BOARD LEADERSHIP STRUCTURE

Currently, our leadership structure separates the offices of CEO and Chairperson of the Board with Dr. Ben-Maimon serving as our CEO and Mr. Truitt serving as Chairperson of the Board. Separating these positions allows the CEO to focus on day-to-day business, while allowing the Chairperson of the Board to lead the Board in its fundamental role of providing advice to, and independent oversight of, management. The Board recognizes the time, effort and energy that the CEO must devote to her position in the current business environment, as well as the commitment required to serve as Chairperson of the Board, particularly as the Board’s oversight responsibilities continue to grow. The Board believes it is important to retain its flexibility to allocate the responsibilities of the officers of Chairperson of the Board and CEO in any way that is in the best interest of the Company at a given point in time. Our Board believes that the separation of the positions of CEO and Chairperson of the Board reinforces the independence of the Board from management, creates an environment that encourages objective oversight of management’s performance and enhances the effectiveness of our Board as a whole. Although our Bylaws do not require the Chairperson of the Board and CEO positions to be separate, the Board believes that having separate positions is the appropriate leadership structure for the Company currently. The Nominating and Corporate Governance Committee periodically evaluates our Board leadership structure and whether its leadership structure is appropriate to effectively address the specific needs of our business and the long-term interests of our stockholders.

BOARD COMMITTEES

Our Board has established various Committees to assist in discharging its duties: the Audit Committee, the Compensation Committee and the Nominating and Corporate Governance Committee. Each member of our Committees is an “independent director” as that term is defined by the SEC and Nasdaq. The primary responsibilities of each of the Committees and the Committee memberships are provided below under the section entitled “Board Attendance, Committee Meetings and Committee Membership.”

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Each of the Committees has the authority, as its members deem appropriate, to engage legal counsel or other experts or consultants in order to assist the Committee in carrying out its responsibilities.

RISK MANAGEMENT

While the Board has the ultimate oversight responsibility for the risk management process, including monitoring and assessing strategic risk exposure, its Committees oversee risk in certain specified areas. Pursuant to its charter, the Audit Committee oversees management of financial reporting, compliance and litigation risks, including risks related to our insurance, information technology, cybersecurity, human resources and regulatory matters, as well as the steps management has taken to monitor and control such exposures. The Compensation Committee is responsible for overseeing the management of risks relating to our executive compensation policies, plans and arrangements and the extent to which those policies or practices increase or decrease risk for the Company, while the Nominating and Corporate Governance Committee manages risks associated with the independence of the Board, potential conflicts of interest and the effectiveness of the Board.

EVALUATING BOARD EFFECTIVENESS

The Board, led by the Nominating and Corporate Governance Committee, is committed to continuous improvement and believes annual self-evaluations are an important tool for evaluating effectiveness. It conducts an annual self-evaluation of the Board, which is presented to the Board for discussion. In addition, each committee conducts an annual self-assessment in a review process similar to that used by the Board.

CODE OF CONDUCT

We have a written Code of Conduct that applies to our directors, officers and employees, including our principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions. The Code of Conduct covers fundamental ethical and compliance-related principles and practices such as accurate accounting records and financial reporting, avoiding conflicts of interest, the protection and use of our property and information and compliance with legal and regulatory requirements. The Code of Conduct and any amendments thereto, or any waivers of its requirements, is disclosed on our website at www.larimartx.com under “Investors – Corporate Governance.”

DIRECTOR ORIENTATION AND CONTINUING EDUCATION

Our director orientation and continuing education programs familiarize new directors with the Company’s businesses, strategies, and policies, and assists new directors in developing the skills and knowledge required for their service on the Board. From time to time, management advises, or invites outside experts to attend Board meetings, to advise the Board on its responsibilities, management’s responsibilities, developments relevant to corporate governance and best corporate practices. Additionally, Board members may attend, and are encouraged to attend, accredited director education programs at the Company’s expense.

CORPORATE GOVERNANCE GUIDELINES

We have a written set of Corporate Governance Guidelines that are designed to help ensure effective corporate governance of our Company. Our Corporate Governance Guidelines cover topics including, but not limited to, the size and composition of the Board, Board membership criteria, director qualifications and duties, Board committees, director compensation and director communications with third parties. Succession planning for the Board is critical to our success. Our goal is to achieve a Board that provides effective oversight of the Company through the appropriate balance of diversity of perspectives, experience, expertise, and skills. Our Corporate Governance Guidelines are reviewed periodically by the Nominating and Corporate Governance Committee, which recommends any proposed changes to our Board for approval.

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BOARD ATTENDANCE, COMMITTEE MEETINGS AND COMMITTEE MEMBERSHIP

During 2021, our Board held nine meetings, our Audit Committee held four meetings, our Compensation Committee held three meetings and our Nominating and Corporate Governance Committee held two meetings. Each director attended at least 75% of the meetings of the Board and meetings of each Committee on which he or she served during 2021.

Directors are encouraged, but not required, to attend our annual stockholder meetings. All of the directors attended the 2021 Annual Meeting of Stockholders.

Audit Committee

The Audit Committee assists the Board by providing oversight of our financial management, independent auditor, and financial reporting procedures, as well as such other matters as directed by the Board or the Audit Committee Charter.

Among other things, the Audit Committee’s responsibilities include:

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The members of our Audit Committee are Mr. Thomas (chair), Mr. Hamilton and Mr. Truitt. All members of our Audit Committee are deemed “independent” and financially literate under the applicable rules and regulations of the SEC and Nasdaq. Our Board has determined that each of Messrs. Thomas and Truitt qualify as an “audit committee financial expert” within the meaning of SEC regulations. This designation does not impose any duties, obligations or liabilities that are greater than are generally imposed on members of our Audit Committee and our Board.

Nominating and Corporate Governance Committee

The Nominating and Corporate Governance Committee identifies qualified individuals for membership on the Board, recommends to the Board the director nominees to fill vacancies on the Board and to stand for election at the next annual meeting of stockholders, develops and recommends to the Board a set of corporate governance guidelines for the Board and provides oversight of the corporate governance affairs of the Board, as well as such other matters as directed by the Board or the Nominating and Corporate Governance Charter. Among other things, our Nominating and Corporate Governance Committee’s responsibilities include:

The Nominating and Corporate Governance Committee is responsible for identifying individuals that the Nominating and Corporate Governance Committee believes are qualified to become Board members, as described above in the sections entitled “Board Structure and Composition” and “Criteria for Board Membership.”

The members of our Nominating and Corporate Governance Committee are Mr. Leff (chair), Dr. Barrett and Dr. Daniel. Dr. Daniel’s service as a member of our Board and Nominating and Corporate Governance Committee will end effective as of the date of the Annual Meeting. The Board has determined that all Nominating and Corporate Governance Committee members are independent under the listing standards of Nasdaq.

Compensation Committee

The Compensation Committee reviews the performance and development of our management in achieving corporate goals and objectives and assures that our executive officers (including our CEO) are compensated effectively in a manner consistent with our strategy, competitive practices and stockholder interests, as well as such other matters as directed by the Board or the Compensation Committee Charter. Among other things, the Compensation Committee’s responsibilities include:

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Subject to certain limitations, our Compensation Committee has delegated authority to our CEO to grant options or other stock awards to our non-executive officers. Our Compensation Committee also has the authority to form and delegate authority to one or more subcommittees as it deems appropriate from time to time under the circumstances. The Compensation Committee annually reviews the performance of each of the executive officers, including the CEO. It then determines and approves the compensation of each executive officer, other than the CEO, and determines and makes recommendations regarding the CEO’s compensation level to the Board for approval.

Radford (an operating unit of Aon plc and a widely recognized leader in gathering and analyzing industry compensation trends) serves as our independent compensation consultant for executive compensation. Radford reports directly to the Compensation Committee and provides various executive compensation services to the Compensation Committee, including advising the Compensation Committee on the principal aspects of our executive compensation program and evolving industry practices and providing market information and analysis regarding the competitiveness of our program design and our award values in relation to performance. In addition, Aon, an affiliate of Radford, serves as our insurance broker for all of our commercial lines of insurance.

The members of our Compensation Committee are Mr. Truitt (Chair), Dr. Barrett and Mr. Leff. The Board has determined that all Compensation Committee members are independent under the listing standards of Nasdaq, and that they are “non-employee directors” for purposes of Rule 16b-3 under the Securities Exchange Act of 1934 (the “Exchange Act”).

FAMILY RELATIONSHIPS

There are no family relationships among any of our directors or executive officers.

COMPENSATION COMMITTEE INTERLOCKS AND INSIDER PARTICIPATION

During the fiscal year ended December 31, 2021 and as of the date of this Proxy Statement, none of the members of the Compensation Committee was or is one of our officers or employees, and none of our executive officers has served or serves on the compensation committee or board of any company that employed or employs any member of our Compensation Committee or Board.

STOCKHOLDER ENGAGEMENT

Connect

Engaging with investors is fundamental to our commitment to good corporate governance and essential to maintaining strong corporate governance practices. Throughout the year, we seek opportunities to connect with our investors to gain and share valuable insights into current and emerging global governance trends.

Collaborate

We strive for a collaborative approach to stockholder engagement and value the variety of investors’ perspectives received, which helps deepen our understanding of their interests and motivations.

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Communicate

Our goal is to communicate with our stockholders through various platforms, including via our website at www.larimartx.com, in print and in person at investor presentations or stockholder meetings. We view communication between our stockholders and the Board as a dialogue.

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We have designed and implemented our compensation program for our non-employee directors to attract, motivate and retain individuals who are committed to our values and goals and who have the expertise and experience that we need to achieve those goals.

NON-EMPLOYEE DIRECTOR COMPENSATION POLICY

Our 2021 non-employee director compensation policy is set forth in the table below.

DIRECTOR COMPENSATION TABLE

The following table below sets forth summary information regarding the compensation of our non-employee directors for the fiscal year ended December 31, 2021.

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INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM FEES

The Audit Committee works with our management in order to negotiate appropriate fees with PwC for the Company and is ultimately responsible for approving those fees. The following is a summary and description of fees for services provided by PwC in 2021 and 2020:

“Audit fees” represents the aggregate fees for professional services rendered for the audit of our consolidated financial statements on Form 10-K, consents for the use of audit reports and reference to the auditor as an expert in our registration statements and professional services rendered for the review of our quarterly financial statements on Form 10-Q that are customary under the standards of the Public Company Accounting Oversight Board (United States). Also included are the fees related to our Registration Statements on Form S-3 and Form S-8.

“Audit Related Fees” represents the aggregate fees for professional services in support of the Merger, other attestation services related to financial reporting that are not required by statute or regulation and, in 2020, the completion of the audit of Chondrial’s consolidated financial statements for the 2019 fiscal year.

“Tax fees” consists of fees related to tax compliance, tax planning and tax advice.

“All other fees” represents payment for access to PwC’s on-line  software tools. These fees were approved by the Audit Committee.

AUDIT COMMITTEE PRE-APPROVAL POLICIES AND PROCEDURES

The Audit Committee is responsible for appointing, retaining, setting compensation for, and evaluating and overseeing the work of the independent registered public accounting firm. The Audit Committee’s charter establishes a policy that all audit and permissible non-audit services provided by the independent registered public accounting firm will be pre-approved by the Audit Committee.

All such audit and permissible non-audit services were pre-approved in accordance with this policy during the fiscal year ended December 31, 2021. These services may include audit services, audit-related services, tax services and other services. The Audit Committee considers whether the provision of each non-audit service is compatible with maintaining the independence of our independent registered public accounting firm. The responsibility to pre-approve audit and non-audit services may be delegated by the Audit Committee to one or more members of the Audit Committee; provided that any decisions made by such member or members must be presented to the full Audit Committee at its next scheduled meeting.

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The primary purpose of the Audit Committee is to assist the Board in its general oversight of the Company’s financial reporting process.

Management is primarily responsible for the preparation, presentation, and integrity of the Company’s consolidated financial statements, accounting and financial reporting principles, internal controls and procedures designed to ensure compliance with accounting standards, applicable laws, and regulations. The Company’s independent registered public accounting firm for the fiscal year 2021, PwC, is responsible for performing an independent audit of the consolidated financial statements and expressing an opinion on the conformity of those consolidated financial statements with generally accepted accounting principles.

The Audit Committee has reviewed and discussed the audited consolidated financial statements contained in the Company’s 2021 Annual Report with management and PwC. The Audit Committee has discussed with PwC the matters required to be discussed by the applicable requirements of the Public Company Accounting Oversight Board (“PCAOB”) and the SEC. In addition, PwC has provided the Audit Committee with the written disclosures and the letter required by the applicable requirements of the PCAOB regarding PwC’s communications with the Audit Committee concerning independence, and the Audit Committee has discussed with PwC its independence.

The Audit Committee also considered whether the independent registered public accounting firm’s provision of non-audit services to the Company is compatible with the auditor’s independence. The Audit Committee has concluded that the independent registered public accounting firm is independent from the Company and its management. Based on the considerations and discussions referred to above, the Audit Committee recommended to the Board that the audited consolidated financial statements be included in the Company’s 2021 Annual Report.

Audit Committee

Frank E. Thomas (Chair)

Thomas E. Hamilton

Joseph Truitt

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The following table sets forth the name, age and position of each of our executive officers as of the date of this Proxy Statement:

Carole S. Ben-Maimon, M.D. — For biographical information for Carole S. Ben-Maimon, M.D., see “Board of Directors—Continuing Directors.”

Michael Celano has served as our Chief Financial Officer since May 2020 and as our Secretary since April 2021. Prior to joining the Company, Mr. Celano served as the Chief Financial Officer of The Columbus Organization, a provider of services for individuals with intellectual and developmental disabilities, since January 2020. From May 2019 to January 2020, Mr. Celano performed consulting work. Mr. Celano has also served as the Chairman of the Board of Directors of OraSure Technologies, Inc. (“OraSure”), a publicly-traded company, specializing in point-of-care diagnostic tests and specimen collection devices, since April 2018. Before his appointment as Chairman of the Board of OraSure, Mr. Celano served as a director for OraSure since October 2006. From January 2018 to May 2019, Mr. Celano served as the Chief Operating Officer of Recro Pharma, Inc. (“Recro”), and from July 2016 to January 2018, Mr. Celano served as Chief Financial Officer of Recro. Between 2015 and June 2016 Mr. Celano was self-employed providing consulting services to healthcare companies. From 2013 to 2015, Mr. Celano served as Chief Financial Officer of DrugScan, Inc., a clinical laboratory services company. Prior to that, Mr. Celano served as the Chief Financial Officer of Kensey Nash Corporation, a biomaterials company, from 2009 to 2012. From 2007 to 2008, Mr. Celano also served as Chief Financial Officer for BioRexis Pharmaceutical Corporation (“BioRexis”), a biopharmaceutical company. Before joining BioRexis, Mr. Celano served as a partner with KPMG LLP (“KPMG”) where he was co-leader of its National Life Science Practice. Mr. Celano also was co-leader of the Life Science Practice for Arthur Andersen LLP before he joined KPMG. Mr. Celano previously served on the board of directors of Performance Health, a consumer health care product manufacturing company from 2015 to 2016. Mr. Celano holds a B.S. in Accounting from St. Joseph’s University.

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This section discusses the material components of the executive compensation program for our named executive officers. In 2021, our named executive officers were:

SUMMARY COMPENSATION TABLE

The following table sets forth information concerning the compensation of our 2021 named executive officers during the fiscal years ended December 31, 2021 and December 31, 2020:

Elements of Compensation

The compensation of our named executive officers generally consists of base salary, annual cash bonus opportunities, long term incentive compensation in the form of equity awards and other benefits, as described below.

Base Salary

The base salary payable to each named executive officer is intended to provide a fixed component of compensation reflecting the executive’s skill set, experience, role, responsibilities, and contributions. For 2021, Dr. Ben-Maimon’s annual base salary rate was $510,000 and Mr. Celano’s annual base salary rate was $366,000. In January 2022, the Compensation Committee or Board, as applicable, increased Dr. Ben-Maimon’s annual base salary rate to $527,850 and Mr. Celano’s annual base salary rate to $377,900.

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Annual Cash and Equity Bonus Opportunities

Each of our named executive officers’ performance-based cash bonus opportunity is expressed as a percentage of base salary that can be achieved by meeting predetermined corporate and individual performance objectives. Our Compensation Committee annually approves the Chief Financial Officer’s bonus payout for the year, while the Board annually approves, upon recommendation from the Compensation Committee, the Chief Executive Officer’s bonus payout for the year.

The 2021 annual bonuses for Dr. Ben-Maimon and Mr. Celano were targeted at 50% and 35% of their respective base salaries. For 2021, they were eligible to earn their annual bonuses pursuant to the achievement of corporate and/or individual performance goals. These goals primarily included removing the FDA’s clinical hold on the Company’s CTI-1601 clinical program, expanding the clinical pipeline, scaling up manufacturing capabilities and completing capital raising transactions. Following a review of the corporate goals attained in 2021, our Compensation Committee approved, and, in the case of Dr. Ben-Maimon, our Compensation Committee recommended and our Board approved: (1) 2021 annual cash bonus payments to each of Dr. Ben-Maimon and Mr. Celano in an amount equal to 55% of their respective target bonus amounts, totaling $140,250 and $70,455, respectively, and (2) 2021 annual equity bonuses to each of Dr. Ben-Maimon and Mr. Celano in the amount of 182,000 and 80,000 options to purchase shares of the Company’s common stock, respectively. Each of the options will vest 25% on the first anniversary of the grant date, with the remaining 75% vesting in equal monthly installments on the last day of each of the 36 calendar months immediately following such date, subject to the grantee’s continued service through the applicable vesting dates.

Equity Incentives

Our equity-based incentive awards are designed to align our interests and the interests of our stockholders with those of our named executive officers. Our Board or Compensation Committee, as applicable, approves equity grants.

Stock option awards to our named executive officers generally vest 25% on the first anniversary of the grant date, with the remaining 75% vesting in equal monthly installments on the last day of each of the 36 calendar months immediately following the first anniversary of the grant date, subject generally to the named executive officer’s continuous service through the relevant vesting dates.

Other Benefits

We currently provide broad-based welfare benefits that are available to all our employees, including our named executive officers, including health, dental, life, vision and disability insurance.

We do not maintain any defined benefit pension plans or nonqualified deferred compensation plans. We do maintain a 401(k) plan and our named executive officers are eligible to participate in that plan on the same terms as our other employees generally.

PLEDGING AND HEDGING POLICIES

Under the terms of our Insider Trading Policy, our executive officers and directors are prohibited from: trading in call or put options involving our securities and other derivative securities; engaging in short sales of our securities; holding our securities in a margin account, all forms of hedging or monetizing our transactions, such as zero-cost collars and forward sale contracts and pledging company securities to secure margin or other loans.

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OUTSTANDING EQUITY AWARDS AT FISCAL YEAR-END

The following table sets forth information regarding the number of shares of common stock underlying outstanding plan awards held by each of our named executive officers as of December 31, 2021:

EMPLOYMENT AGREEMENTS

We have entered into employment agreements with each of our named executive officers:

Employment Agreement with Carole S. Ben-Maimon, M.D. We entered into an employment agreement with Dr. Ben-Maimon, as our President and Chief Executive Officer, on July 31, 2020 to supersede her employment agreement with Chondrial, dated December 1, 2016, and to otherwise establish the terms and conditions of Dr. Ben-Maimon’s employment by the Company. Pursuant to the terms of this agreement, Dr. Ben-Maimon’s initial annual base salary was $470,000 and her target annual bonus opportunity was, and remains at, not less than 50% of her base salary.

Employment Agreement with Michael Celano. We entered into an employment agreement with Mr. Celano, as our Chief Financial Officer, on June 1, 2020. Mr. Celano’s period of employment with the Company commenced on May 28, 2020. Pursuant to the terms of this agreement, Mr. Celano’s initial annual base salary was $350,000 and his target annual bonus opportunity is not less than 35% of his base salary. The Compensation Committee increased this bonus opportunity percentage to 40% of base salary effective January 1, 2022. In connection with his hiring, on May 28, 2020, Mr. Celano received a stock option grant in respect of 60,479 shares of our common stock (the “Initial Award”), as further described in the table above entitled “Outstanding Equity Awards at Fiscal Year-End.”

Confidential Information and Invention Agreement

Each of Dr. Ben-Maimon and Mr. Celano have also entered into a standard form agreement with respect to confidentiality of the Company’s proprietary information and assignment of inventions. Among other things, this agreement obligates each of them to refrain from disclosing any of the Company’s proprietary information and to assign to the Company inventions conceived or developed during the course of employment. Such agreement also provides that during the period of such officer’s employment and for one year thereafter, they will not compete with the Company and will not solicit the Company’s employees, contractors, lenders, partners or suppliers.

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Ben-Maimon and Celano Severance Rights

Each of Dr. Ben-Maimon’s and Mr. Celano’s employment agreement provides that, in the event the executive’s employment with the Company ceases for any reason, he or she will be entitled to receive any accrued, unpaid base salary and reimbursement for expenses incurred by the executive, but not yet reimbursed, prior to the date of termination, in accordance with our expense reimbursement policies (the “Accrued Rights”).

If the executive’s employment is terminated without cause or they resign with good reason, then in addition to the Accrued Rights, such executive will be entitled to receive:

However, if the executive’s employment is terminated without cause or the executive resigns with good reason within one year following a change in control, then in lieu of the severance payments and benefits described above, he or she would instead receive:

In each case, the severance payments are conditioned on the executive’s execution and delivery of a general release of claims against the Company and its affiliates in a form prescribed by the Company and on such release becoming irrevocable within 30 days following the executive’s cessation of employment.

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Since January 1, 2020, we have engaged in the following transactions with our directors, executive officers, holders of more than 5% of our voting securities, and affiliates or immediate family members of our directors, executive officers, and holders of more than 5% of our voting securities. We believe that all of these transactions were on terms as favorable as could have been obtained from unrelated third parties.

INDEMNIFICATION AGREEMENTS

We have entered or intend to enter into indemnification agreements with each of our directors and officers. These indemnification agreements may require us, among other things, to indemnify our directors and officers for some expenses, including attorneys’ fees, judgments, fines and settlement amounts incurred by a director or officer in any action or proceeding arising out of his or her service as one of our directors or officers, or any of our subsidiaries or any other company or enterprise to which the person provides services at our request.

OTHER TRANSACTIONS

We have entered into various employment-related agreements with our executive officers that, among other things, provide for compensatory and certain change in control benefits. For a description of these agreements and arrangements with our named executive officers, see the section titled “Executive Compensation — Employment Agreements.”

We have also granted stock options to our executive officers and directors. For a description of these stock options, see the sections titled “Director Compensation” and “Executive Compensation.”

POLICIES AND PROCEDURES FOR RELATED PERSON TRANSACTIONS

Our Board has adopted a written Related Party Transaction Policy that governs the review and approval of related party transactions. The Related Party Transaction Policy covers 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. Pursuant to the Related Party Transaction Policy, if we want to enter into a transaction with a related party or an affiliate of a related party, the Audit Committee will review the proposed transaction to determine, based on applicable rules of Nasdaq and the SEC, whether such transaction requires approval by the Audit Committee. If approval is required, the proposed transaction will be reviewed at the next regular meeting of the Audit Committee, and we may not enter into a related party transaction unless the Audit Committee has specifically confirmed in writing that either no further reviews are necessary or that all requisite corporate reviews have been obtained. In reviewing and approving any such transactions, our Audit Committee is tasked to consider all relevant facts and circumstances with respect to the transaction and shall evaluate all available options, including ratification, revision or termination of the transaction. The Audit Committee will not approve or ratify a transaction with a related party unless it has determined, upon consideration of all relevant information, that the transaction is in, or not inconsistent with, the best interests of the Company or its stockholders. All of the transactions described under “Certain Relationships and Related Party Transactions” in this Proxy Statement occurred prior to or concurrently with the adoption of the Related Party Transaction Policy and as such, these transactions were not subject to the approval and review procedures set forth in the Related Party Transaction Policy. However, these transactions were reviewed and approved by our Board.

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The following table is a summary of the shares available for grant under the Company’s equity incentive plans as of December 31, 2021:

Other information with respect to this item is set forth in this Proxy Statement under the headings “Security Ownership of Certain Beneficial Owners and Management,” “Executive Compensation,” and “Director Compensation,” and is incorporated herein by reference.

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The following table sets forth certain information regarding the beneficial ownership of common stock as of April 4, 2022 by (a) each person known by us to be the beneficial owner of more than 5% of the outstanding shares of common stock, (b) each named executive officer identified in the “Summary Compensation Table” above, (c) each director and nominee for director, and (d) all executive officers and directors as a group.

The percentage of common stock outstanding is based on 17,710,450 shares of our common stock outstanding as of April 4, 2022. For purposes of the table below, and in accordance with the rules of the SEC, we deem shares of common stock subject to options, warrants or other derivative securities of the Company that are currently exercisable or exercisable within sixty days of April 4, 2022 to be outstanding and to be beneficially owned by the person holding such securities for the purpose of computing the percentage ownership of that person, but we do not treat them as outstanding for the purpose of computing the percentage ownership of any other person. Except as otherwise noted, each of the persons or entities in this table has sole voting and investing power with respect to all of the shares of common stock beneficially owned by them, subject to community property laws, where applicable. Except as otherwise noted below, the street address of each beneficial owner is c/o Larimar Therapeutics, Inc., Three Bala Plaza East, Suite 506, Bala Cynwyd, PA 19004.

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DELINQUENT SECTION 16(A) REPORTS

Section 16 of the Exchange Act requires the Company’s directors, certain officers, and beneficial owners of more than ten percent of the Company’s common stock to file reports with the SEC indicating their holdings of and transactions in the Company’s equity securities and to provide copies of such reports to the Company. Based solely on a review of such reports and written representations from the Company’s reporting persons, the Company believes that all Section 16 filing requirements were fulfilled on a timely basis, except that each of Peter Barrett, Ph.D., Thomas O. Daniel, M.D., Thomas E. Hamilton, Jonathan Leff, Frank E. Thomas and Joseph Truitt filed one late Form 4 with respect to an equity grant, each of which was filed late due to an administrative error.

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PROPOSAL 1: ELECTION OF CLASS II DIRECTOR FOR A THREE-YEAR TERM EXPIRING IN 2025

At the Annual Meeting, our stockholders will vote on the election of the Class II director nominee named in this Proxy Statement as a director, to serve until our 2025 Annual Meeting of Stockholders and until his successor is elected and qualified. Our Board has unanimously nominated Thomas E. Hamilton for election to our Board at the Annual Meeting.

The nominee has agreed to be named and to serve, and we expect him to be able to serve if elected. If Mr. Hamilton is unable to serve, the Nominating and Corporate Governance Committee will recommend to our Board a replacement nominee. The Board may then designate the other nominee to stand for election. If you voted for Mr. Hamilton, your vote will be cast for his replacement.

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PROPOSAL 2: APPROVAL, ON AN ADVISORY BASIS, OF THE COMPENSATION OF OUR NAMED EXECUTIVE OFFICERS IN 2021

We are offering our stockholders an opportunity to cast an advisory vote to approve the compensation of our named executive officers, as disclosed in this Proxy Statement, pursuant to Section 14A of the Exchange Act, which was put in place by the Dodd-Frank Wall Street Reform and Consumer Protection Act of 2010. This proposal, commonly known as “say-on-pay,” gives our stockholders the opportunity to express their views on our named executive officers’ compensation. The vote is advisory, and, therefore, it is not binding on the Board, the Compensation Committee, or the Company. Nevertheless, the Compensation Committee will consider the outcome of the vote when considering future executive compensation decisions. We currently intend to conduct this advisory vote annually.

Our executive compensation program is designed to attract, motivate and retain our named executive officers who are critical to our success. Our Board believes that our executive compensation program is well tailored to retain and motivate key executives while recognizing the need to align our executive compensation program with the interests of our stockholders and our “pay-for-performance” philosophy. Our Compensation Committee continually reviews the compensation programs for our named executive officers to ensure they achieve the desired goals of aligning our executive compensation structure with our stockholders’ interests and current market practices.

We encourage our stockholders to read the “Summary Compensation Table” and other related compensation tables and narrative disclosures, which describe the 2021 compensation of our named executive officers.

We are asking our stockholders to indicate their support for the compensation of our named executive officers as described herein. This vote is not intended to address any specific item of compensation, but rather the overall compensation of our named executive officers and our executive compensation philosophy, programs, and practices as described in this Proxy Statement.

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PROPOSAL 3: RATIFICATION OF APPOINTMENT OF PRICEWATERHOUSECOOPERS LLP AS OUR INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM FOR THE 2022 FISCAL YEAR

The Audit Committee of the Board has appointed and engaged PwC to serve as our independent registered public accounting firm to audit the consolidated financial statements of the Company and our subsidiary for the 2022 fiscal year, and to perform audit-related services. PwC has served as our independent registered public accounting firm since 2014.

Stockholders are hereby asked to ratify the Audit Committee’s appointment of PwC as our independent registered public accounting firm for the 2022 fiscal year.

The Audit Committee is solely responsible for selecting our independent auditors. Although stockholder ratification of the appointment of PwC to serve as our independent registered public accounting firm is not required by law or our organizational documents, the Board has determined that it is desirable to seek stockholder ratification as a matter of good corporate governance in view of the critical role played by independent registered public accounting firms in maintaining the integrity of financial controls and reporting. If the stockholders do not ratify the appointment of PwC, the Audit Committee will reconsider its selection and whether to engage an alternative independent registered public accounting firm, but may ultimately determine to retain PwC as our independent registered public accounting firm.

Representatives of PwC are expected to virtually attend the Annual Meeting where they will be available to respond to appropriate questions and, if they desire, to make a statement.

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OTHER MATTERS

The Annual Meeting is called for the purposes set forth in the Notice. Our Board does not know of any other matters to be considered by the stockholders at the Annual Meeting, other than the matters described in the Notice. However, the enclosed proxy confers discretionary authority on the persons named in the proxy card with respect to matters that may properly come before the Annual Meeting and that are not known to our Board at the date this Proxy Statement was printed. It is the intention of the persons named in the proxy card to vote in accordance with their best judgment on any such matter.

REQUIREMENTS FOR SUBMISSION OF STOCKHOLDER PROPOSALS FOR NEXT YEAR’S ANNUAL MEETING

Stockholders intending to present a proposal to be considered for inclusion in the proxy statement for our 2023 Annual Meeting of Stockholders must submit a proposal that is received at our principal executive offices no later than December 13, 2022, which is the 120^th day prior to the first anniversary we released this Proxy Statement to our stockholders for the 2022 Annual Meeting of Stockholders. If we change the date of the 2023 Annual Meeting of Stockholders by more than 30 days from the anniversary of this year’s Annual Meeting, stockholder proposals must be received no later than the close of business on the tenth day following the day on which public announcement of the date of the meeting was first made in order to be considered for inclusion in our proxy statement. Proposals must be sent via registered, certified, or express mail (or other means that allows the stockholder to determine when the proposal was received by the Secretary) to our Secretary at Larimar Therapeutics, Inc., Three Bala Plaza East, Suite 506, Bala Cynwyd, PA 19004. Proposals must contain the information required under our Bylaws, a copy of which is available upon request to our Secretary, and must comply with the SEC’s regulations regarding the inclusion of stockholder proposals in Company-sponsored proxy materials.

Stockholders intending to present a proposal or nominate a director for election at our 2023 Annual Meeting of Stockholders without having the proposal or nomination included in our Proxy Statement must comply with the requirements set forth in our Bylaws. Our Bylaws require, among other things, that the Secretary of the Company receive the proposal or nomination no earlier than the close of business on the 120^th day, and no later than the close of business on the 90^th day, prior to the first anniversary of the preceding year’s Annual Meeting. Accordingly, for our 2023 Annual Meeting of Stockholders, our Secretary must receive the proposal or nomination no earlier than January 10, 2023 and no later than the close of business on February 9, 2023. However, if we change the date of the 2023 Annual Meeting of Stockholders by more than 30 days before or 60 days after the anniversary of this year’s Annual Meeting, stockholder proposals must be received no later than the close of business on the later of the 90^th day prior to the scheduled date of the meeting and the tenth day following the day on which public notice of the meeting was first made. Proposals must contain the information required under our Bylaws, a copy of which is available upon request to our Secretary. If the stockholder does not meet the applicable deadlines or comply with the requirements of SEC Rule 14a-4, we may exercise discretionary voting authority under proxies we solicit to vote, in accordance with our best judgment, on any such proposal.

STOCKHOLDER COMMUNICATIONS TO THE BOARD

Stockholders and other interested parties may communicate with the Board by writing to the Secretary, Larimar Therapeutics, Inc., Three Bala Plaza East, Suite 506, Bala Cynwyd, PA 19004. Communications intended for a specific director or directors should be addressed to their attention to the Secretary at the address provided above. Communications received from stockholders are forwarded directly to Board members as part of the materials mailed in advance of the next scheduled Board meeting following receipt of the communications. The Board has authorized the Secretary, in his or her discretion, to forward communications on a more expedited

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basis if circumstances warrant or to exclude a communication if it is illegal, unduly hostile or threatening, or similarly inappropriate. Advertisements, solicitations for periodical or other subscriptions, and other similar communications generally will not be forwarded to the directors.

HOUSEHOLDING

Stockholders who share a single address may receive only one copy of this Proxy Statement and the 2021 Annual Report, unless we have received contrary instructions from the impacted stockholders. This practice, known as “householding,” is designed to reduce our printing and postage costs and the environmental impact of the Annual Meeting. Stockholders who participate in householding will continue to receive separate proxy cards if they received a paper copy of proxy materials in the mail. We agree to deliver promptly, upon written or oral request, a separate copy of the proxy materials to any stockholder at a shared address to which a single copy of these documents were delivered. If your household received only a single set of our proxy materials and you would like a separate copy, please contact our Chief Financial Officer by calling (844) 511-9056 or in writing to Chief Financial Officer, Larimar Therapeutics, Inc., Three Bala Plaza East, Suite 506, Bala Cynwyd, PA 19004. If your household received multiple copies of our proxy materials and you would, in the future, prefer to receive only a single copy, please contact our Chief Financial Officer at the address or phone number listed above. Stockholders who hold shares in street name may contact their brokerage firm, bank, or other nominee to request information about householding.

AVAILABILITY OF MATERIALS

Our 2021 Annual Report, including the consolidated financial statements, has been filed with the SEC and provides additional information about us, which is incorporated by reference herein. It is available on the Internet at www.larimartx.com and is available in paper form (other than exhibits thereto) by first class mail or other equally prompt means to beneficial owners of our common stock, without charge, upon written request to Chief Financial Officer, Larimar Therapeutics, Inc., Three Bala Plaza East, Suite 506, Bala Cynwyd, PA 19004 or at (844) 511-9056. In addition, it is available to beneficial holders of our common stock at http://www.edocumentview.com/LRMR and to record holders of our common stock at http://www.envisionreports.com/LRMR.

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MMMMMMMMMMMMMM C123456789 000000000.000000 ext. 000000000.000000 ext. 000004 000000000.000000 ext. 000000000.000000 ext. ENDORSEMENT_LINE SACKPACK 000000000.000000 ext. 000000000.000000 ext. MR A SAMPLE DESIGNATION (IF ANY) ADD 1 Your vote matters – here’s how to vote! ADD 2 ADD 3 You may vote online or by phone instead of mailing this card. ADD 4 MMMMMMMMM ADD 5 Online ADD 6 Go to www.envisionreports.com/LRMR or scan the QR code — login details are located in the shaded bar below. Phone Call toll free 1-800-652-VOTE (8683) within the USA, US territories and Canada Save paper, time and money! Using a black ink pen, mark your votes with an X as shown in this example. Sign up for electronic delivery at Please do not write outside the designated areas. www.envisionreports.com/LRMR 2022 Annual Meeting Proxy Card 1234 5678 9012 345 if VOTING BY MAIL, SIGN, DETACH AND RETURN THE BOTTOM PORTION IN THE ENCLOSED ENVELOPE. q A Proposals — The Board of Directors recommend a vote FOR the nominee listed and FOR Proposals 2 and 3. 1. Election of Class II Director for a Three-Year Term Expiring in 2025 + For Against Abstain 01— Thomas E. Hamilton for Against Abstain 2. Approval, on an Advisory Basis, of the Compensation of our Named Executive Officers in 2021 3. Ratification of Appointment of PricewaterhouseCoopers LLP as our Independent Registered Public Accounting Firm for the 2022 Fiscal Year B Authorized Signatures — This section must be completed for your vote to count. Please date and sign below. Please sign exactly as name(s) appears hereon. Joint owners should each sign. When signing as attorney, executor, administrator, corporate officer, trustee, guardian, or custodian, please give full title. Date (mm/dd/yyyy) — Please print date below. Signature 1 — Please keep signature within the box. Signature 2 — Please keep signature within the box. C 1234567890 J N T MR A SAMPLE (THIS AREA IS SET UP TO ACCOMMODATE 140 CHARACTERS) MR A SAMPLE AND MR A SAMPLE AND MR A SAMPLE AND MR A SAMPLE AND MR A SAMPLE AND MMMMMM 1UPX 539501 MR A SAMPLE AND MR A SAMPLE AND MR A SAMPLE AND + 03MHIF    

The 2022 Annual Meeting of Stockholders of Larimar Therapeutics, Inc. will be held on Tuesday, May 10, 2022 at 9:30 A.M. Eastern time, virtually via the internet at meetnow. global/MYGPWRJ. To access the virtual meeting, you must have the information that is printed in the shaded bar located on the reverse side of this form. Important notice regarding the Internet availability of proxy materials for the Annual Meeting of Stockholders. The material is available at: www.envisionreports.com/LRMR Small steps make an impact. Help the environment by consenting to receive electronic delivery, sign up at www.envisionreports.com/LRMR if VOTING BY MAIL, SIGN, DETACH AND RETURN THE BOTTOM PORTION IN THE ENCLOSED ENVELOPE. q Larimar Therapeutics, Inc. + Notice of 2022 Annual Meeting of Stockholders Proxy Solicited by Board of Directors for Annual Meeting — May 10, 2022 Carole Ben-Maimon, M.D. and Michael Celano or either of them, each with the power of substitution, are hereby authorized to represent and vote the shares of the undersigned, with all the powers which the undersigned would possess if personally present, at the Annual Meeting of Stockholders of Larimar Therapeutics, Inc. to be held on May 10, 2022 or at any postponement or adjournment thereof. Shares represented by this proxy will be voted as instructed by the undersigned. If no such directions are indicated, the Proxies will have authority to vote FOR the nominee listed and FOR Proposals 2 and 3. In their discretion, the Proxies are authorized to vote upon such other business as may properly come before the meeting. (Items to be voted appear on reverse side) C Non-Voting Items Change of Address — Please print new address below. Comments — Please print your comments below.