SCHEDULE 13G/A 0001907884 XXXXXXXX LIVE 2 Common Stock, par value $0.001 12/31/2025 0001622229 Cogent Biosciences, Inc. 19240Q201 275 WYMAN STREET 3RD FLOOR WALTHAM MA 02451 Rule 13d-1(b) Kynam Capital Management, LP DE 0 6165223 0 6165223 6165223 N 4.33 IA Kynam Capital Management GP, LLC DE 0 6165223 0 6165223 6165223 N 4.33 OO Yue Tang X1 0 6165223 0 6165223 6165223 N 4.33 IN Cogent Biosciences, Inc. 275 WYMAN STREET, 3RD FLOOR, WALTHAM, MASSACHUSETTS 02451 Kynam Capital Management, LP Kynam Capital Management GP, LLC Yue Tang 221 ELM ROAD PRINCETON, New Jersey 08540 Kynam Capital Management, LP - DELAWARE Kynam Capital Management GP, LLC - DELAWARE Yue Tang - UNITED STATES N IA 6,165,223 4.33 Kynam Capital Management, LP - 0 Kynam Capital Management GP, LLC - 0 Yue Tang - 0 Kynam Capital Management, LP - 6,165,223 Kynam Capital Management GP, LLC - 6,165,223 Yue Tang - 6,165,223 Kynam Capital Management, LP - 0 Kynam Capital Management GP, LLC - 0 Yue Tang - 0 Kynam Capital Management, LP - 6,165,223 Kynam Capital Management GP, LLC - 6,165,223 Yue Tang - 6,165,223 Y Y Y Y Y N By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11. Kynam Capital Management, LP Yue Tang 02/17/2026 Kynam Capital Management GP, LLC Yue Tang 02/17/2026 Yue Tang Yue Tang 02/17/2026