X0306 4 2019-05-06 0 0001756262 TransMedics Group, Inc. TMDX 0001190128 TOBIN JAMES R C/O TRANSMEDICS GROUP, INC. 200 MINUTEMAN ROAD ANDOVER MA 01810 1 0 0 0 Common Stock 2019-05-06 4 J 0 500000 D 0 I By the James R. Tobin 2012 Trust Common Stock 2019-05-06 4 J 0 142857 A 142857 I By the James R. Tobin 2012 Trust Common Stock 2019-05-06 4 C 0 291948 A 434805 I By the James R. Tobin 2012 Trust Series C Convertible Preferred Stock 2019-05-06 4 C 0 400000 D Common Stock 114286 0 I By the James R. Tobin 2012 Trust Series D Convertible Preferred Stock 2019-05-06 4 C 0 400000 D Common Stock 114285 0 I By the James R. Tobin 2012 Trust Series F Convertible Preferred Stock 2019-05-06 4 C 0 221820 D Common Stock 63377 0 I By the James R. Tobin 2012 Trust The Common Stock reported herein as being disposed of is 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 April 15, 2019 (the "Merger Agreement") such common stock of TransMedics, Inc. was converted into shares of common stock of the Issuer on a 3.5-for-one basis. The Preferred Stock reported herein is preferred stock of TransMedics, Inc. Immediately prior to the closing of the Issuer's initial public offering, pursuant to the terms of the Merger Agreement, such preferred stock of TransMedics, Inc. was converted into shares of common stock of the Issuer based on (i) the one-for-one ratio on which such shares of preferred stock of TransMedics Inc. were convertible into shares of common stock of TransMedics Inc. according to their terms and (ii) the 3.5-for-one ratio on which shares of common stock of TransMedics, Inc. were converted into shares of common stock of the Issuer. The Preferred Stock has no expiration date. By: /s/ Stephen Gordon, Attorney-in-Fact 2019-05-06