X0306 4 2023-02-17 0 0001789972 Cullinan Oncology, Inc. CGEM 0001362054 Baeuerle Patrick C/O CULLINAN ONCOLOGY, INC. ONE MAIN STREET, SUITE 1350 CAMBRIDGE MA 02142 0 1 0 0 Chief Scientific Officer Common Stock 2023-02-17 4 A 0 38500 0.00 A 76000 D Common Stock 341434 I See footnote Stock Option (Right to Buy) 11.34 2023-02-17 4 A 0 77000 0.00 A 2033-02-16 Common Stock 77000 77000 D The shares underlying the restricted stock unit vest over four years, with one forty-eighth (1/48th) of the shares vesting in equal monthly installments until the fourth anniversary of the grant date. Shares held directly by APAK Solutions GmbH. The Reporting Person is managing director of APAK Solutions GmbH. The Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his pecuniary interest therein. The shares underlying the option vest over four years, with one forty-eighth (1/48th) of the shares vesting in equal monthly installments until the fourth anniversary of the grant date. Exhibit 24.1 - Power of Attorney /s/ Jacquelyn Sumer, Attorney-in-Fact 2023-02-21