X0306 4 2023-02-14 0 0001756262 TransMedics Group, Inc. TMDX 0001430466 Hassanein Waleed H C/O TRANSMEDICS GROUP, INC. 200 MINUTEMAN ROAD ANDOVER MA 01810 1 1 0 0 President & CEO Common Stock 2023-02-14 4 S 0 2173 70.08 D 389112 D The reported transactions were effected pursuant to a Rule 10b5-1 trading plan. The price reported is a weighted average price. These shares were sold in multiple transactions ranging from $70.00 to $70.25, inclusive. The Reporting Person undertakes to provide to the Company, any security holder of the Company or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range. By: /s/ Stephen Gordon, Attorney-in-Fact 2023-02-16