X0609 4 2026-05-08 0001882782 Odyssey Therapeutics, Inc. ODTX 0002040933 Dimension Capital II, L.P. false 632 BROADWAY, SUITE 801 NEW YORK NY 10012 1 0 0 0 0 Common Stock 2026-05-08 4 C 0 1709543 A 2222405 D Common Stock 2026-05-08 4 P 0 1111111 18 A 3333516 D Series D Convertible Preferred Stock 2026-05-08 4 C 0 16611626 D Common Stock 1709543 0 D The Series D Preferred Stock automatically converted into Common Stock immediately prior to the closing of the Issuer's initial public offering on a 1-for-9.7170 basis for no additional consideration. Held directly by Dimension Capital II, L.P. ("Dimension Capital II"). Dimension Management, L.P. ("Dimension Management") is the investment advisor to Dimension Capital II. Dimension Management GP, L.P. is the general partner of Dimension Management, and Dimension Management GP, LLC ("Dimension Management GP") is the general partner of Dimension Management GP, L.P. Dimension Capital II GP, LLC ("Dimension Capital II GP") is the general partner to the general partner of Dimension Capital II. Adam Goulburn, Zavain Dar, and Nan Li are members of each of Dimension Management GP and Dimension Capital II GP. Mr. Li serves on the Issuer's board of directors. Each of Dimension Management, Dimension Management GP, Dimension Capital II GP, Mr. Goulburn, Mr. Dar, and Mr. Li disclaims, for purposes of Section 16 of the Securities Exchange Act of 1934, beneficial ownership of such securities, except to the extent of his/its indirect pecuniary interest therein. Gives effect to the 1-for-9.7170 reverse stock split effected prior to the closing of the Issuer's initial public offering. s/ Adam Goulburn - for Dimension Capital II, L.P., By: Dimension Capital II GP, LP, its general partner, By: Adam Goulburn, Member 2026-05-12