X0306 4 2022-06-28 0 0001718108 Surface Oncology, Inc. SURF 0001760229 Brunn Carsten C/O SURFACE ONCOLOGY, INC. 50 HAMPSHIRE STREET, 8TH FLOOR CAMBRIDGE MA 02139 1 0 0 0 Stock Option (Right to Buy) 1.74 2022-06-28 4 A 0 48000 0.00 A 2032-06-28 Common Stock 48000 48000 D 50% of the Options shall vest on June 28, 2023, and the remainder of the Options shall vest in equal monthly installments over the following twelve months, such that all of the Options shall be vested on June 28, 2024, subject to the Reporting Person's continued service relationship with the Company on each such vesting date. /s/ Jessica Fees, as Attorney-in-Fact 2022-06-30