X0306 4 2019-05-06 0 0001756262 TransMedics Group, Inc. TMDX 0001708144 Gunderson Thomas James C/O TRANSMEDICS GROUP, INC. 200 MINUTEMAN ROAD ANDOVER MA 01810 1 0 0 0 Stock Option (Right to Buy) 0.63 2019-05-06 4 J 0 67500 D 2026-08-01 Common Stock 19285 0 D Stock Option (Right to Buy) 2.21 2019-05-06 4 J 0 19285 A 2026-08-01 Common Stock 19285 19285 D The Stock Options reported herein as being disposed of are options to purchase common stock of TransMedics, Inc. Immediately prior to the closing of the Issuer's initial public offering, pursuant to the terms of the Agreement and Plan of Merger and Reorganization, by and among the Issuer, TransMedics, Inc. and TMDX, Inc., dated as of April 15, 2019 (the "Merger Agreement"), each outstanding option to purchase shares of common stock of TransMedics, Inc. was converted into an outstanding option to purchase shares of common stock of the Issuer adjusted on a 3.5-for-one basis, with a corresponding adjustment to the exercise price. The option will become exercisable as to 2.778% of the original number of shares at the end of each successive one-month period following the vesting commencement date, August 1, 2016, until the option is fully vested on the third anniversary of the vesting commencement date. By: /s/ Stephen Gordon, Attorney-in-Fact 2019-05-06