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Waleed H. Hassanein, M.D., age 57, our founder, has served as our President and Chief Executive Officer and as a member of our Board since August 1998. Prior to founding TransMedics, Inc., Dr. Hassanein completed a three-year cardiac surgery research fellowship at West Roxbury VA Medical Center and Brigham and Women's Hospital, a Harvard Medical School affiliate. Prior to his research fellowship, Dr. Hassanein completed two years of general surgery residency at Georgetown University Medical Center. Dr. Hassanein received a M.D. degree from Georgetown University in 1993. Prior to transferring to Georgetown University, Dr. Hassanein attended Cairo University School of Medicine from 1985 to 1989, and holds a General Certificate of Education from the University of London.

Tamer Khayal, M.D., age 56, has served as our Chief Commercial Officer since January 2018. He served as our Chief Medical Officer and Vice President of Clinical Development from 2006 to 2017 and as our Director of Clinical Development from 2001 to 2006. Prior to joining TransMedics, Dr. Khayal served for six years as Director of Clinical Affairs for Zentiva Group, a.s., a pharmaceutical company, where he led clinical research, regulatory filings and clinical sales training for the company's Middle East and Africa operations. Prior to his employment in the pharmaceutical industry, Dr. Khayal was a practicing physician. Dr. Khayal received a General Certificate of Education from the University of London and a M.D. degree from Cairo University School of Medicine. Dr. Tamer Khayal, M.D. will transition to Senior Vice President of International for the Company effective as of February 2, 2026.

Thomas J. Gunderson, age 75, has served as a member of our Board since August 2016. Mr. Gunderson has served as Chair of the Board of Directors at the Minneapolis Heart Institute Foundation from 2015 to 2020 and 2024 to present, as Executive in Residence at the University of Minnesota's Medical Industry Leadership Institute from 2016 to present, as a member of the Board of Directors of Merit Medical Systems, Inc. from 2017 to present, as a member of American Heart Association Science and Technology Accelerator Committee from 2015 to 2017 and as managing director and senior research analyst at Piper Jaffray (with a focus on medical technology companies) from 1992 to 2016.

Merilee Raines, age 70, has served as a member of our Board since January 2021. Ms. Raines served as Chief Financial Officer of IDEXX Laboratories, Inc. from October 2003 until her retirement in May 2013. Prior to becoming Chief Financial Officer, Ms. Raines held several management positions with IDEXX Laboratories, including Corporate Vice President of Finance, Vice President and Treasurer of Finance, Director of Finance, and Controller. IDEXX Laboratories develops, manufactures, and distributes diagnostic and information technology-based products and services primarily for companion animals, livestock, poultry, water quality and food safety, and human point of care diagnostics. Ms. Raines has served on the board of directors of Watts Water Technologies, Inc. since 2011, and serves on its audit committee and nominating and corporate governance committee. Ms. Raines has served on the board of directors of Ocular Therapeutics, Inc. since September 2021 and serves on its audit committee. Ms. Raines previously served on the board of directors of Benchmark Electronics, Inc., from 2018 until 2021. Ms. Raines has also served on the boards of directors of several private companies, including Excelitas Technologies Corporation since 2018 and previously Dead River Company from 2018 until 2021. Ms. Raines received a Bachelor's Degree in mathematics from Bowdoin College and an MBA from the University of Chicago.

Edward M. Basile, age 78, has served as a member of our Board since February 2016. He is currently retired. During his 25-year tenure with the law firm King & Spalding LLP, Mr. Basile served as Chair of the firm's FDA and Life Sciences Practice and on the firm's Policy and Compensation Committees. Mr. Basile's law practice included representing large, medium and small medical device, pharmaceutical, and biotechnology companies before the U.S. Food and Drug Administration. Mr. Basile also served in the Chief Counsel's Office of FDA as Associate Chief Counsel for Drugs & Biologics and Associate Chief Counsel for Enforcement from 1975 to 1985. Mr. Basile received a Bachelor's Degree in mechanical engineering from Lafayette College and a J.D. from George Washington University Law School.

David Weill, M.D., age 62, has served as a member of our Board since April 2019. Dr Weill has served since 2016 as Principal of the Weill Consulting Group, a biomedical consulting group focusing on organ transplantation and lung disease. Dr. Weill has been involved in the transplant and advanced lung disease fields for over 20 years, directing clinical programs and providing care to those afflicted with significant lung diseases. Dr. Weill served as Director of the Lung and Heart-Lung Transplant Program at Stanford University Medical Center from 2005 until 2016 and is the former Director of the Stanford Center for Advanced Lung Diseases. Dr. Weill received a Bachelor of Arts Degree from Tulane University and a M.D. degree from Tulane University Medical School. He completed his Internship and Residency in Internal Medicine at Parkland Hospital, University of Texas Southwestern and his Fellowship in Pulmonary and Critical Care Medicine and Lung Transplantation at the University of Colorado at Denver and Health Sciences Center.

Edwin M. Kania, Jr., age 68, has served as a member of our Board since December 2003. Mr. Kania is the managing partner of FarField Partners, a personal venture capital investment and advisory firm. Previously, Mr. Kania was co-founder of Flagship Pioneering and served as the firm's initial chairman between 2001 and 2014, formally retiring in late 2018. He was also managing partner of the predecessor OneLiberty Funds that were an early lead investor in our Company. During Mr. Kania's 40+ years in the venture capital industry, he has served on the boards of numerous privately and publicly held companies. Mr. Kania received a Bachelor's Degree in physics from Dartmouth College and an MBA from Harvard Business School.

On September 10, 2026, the Board of Directors of TransMedics Group, Inc. appointed Fernando Araujo as Chief Financial Officer and Treasurer, effective as of September 21, 2026.Fernando Araujo,will serve as Chief Financial Officer and Treasurer effective September 21, 2026. Prior to joining TransMedics, from 2023 to 2026, Mr. Araujo served as Chief Financial Officer for GE Health Care's Advanced Imaging Solutions (a combination of GE Health Care's Imaging and Advanced Visualization Solutions businesses and associated global integrated Supply Chain and Global Service organizations). Before joining GE HealthCare, Mr. Araujo served as Senior Vice President, Finance at 3M Enterprise Operations from October 2022 to March 2023. Prior to that he held various roles at GE, including Chief Financial Officer, Healthcare US and Canada and Chief Financial Officer, Healthcare Latin America from March 2018 to October 2022. Mr. Araujo holds a Bachelor of Business Administration from Centro Universitario UNA and an MBA from Columbia Business School.

On February 1, 2026, the Board of Directors of TransMedics Group, Inc. appointed Giovanni Cecere as Chief Commercial Officer, effective as of February 2, 2026.

On February 1, 2026, the Board appointed Matthew Forsyth as Senior Vice President, General Counsel & Corporate Secretary, effective as of March 9, 2026.