X0609 4 2026-10-01 0001783328 TScan Therapeutics, Inc. TCRX 0001738082 MacBeath Gavin false C/O TSCAN THERAPEUTICS, INC. 830 WINTER STREET WALTHAM MA 02451 true true false false Chief Executive Officer false Voting Common Stock 2026-10-01 4 A false 1000000 0.00 A 1049767 D 25% of the restricted stock units ("RSUs") shall vest on September 30, 2028, with the remaining 75% of the RSUs vesting on the earlier of (i) reporting of completion of the pivotal trial of TSC-101, or (ii) September 30, 2030, subject to continued service with the Issuer through the applicable vesting dates and the terms of the Issuer's Amended and Restated 2021 Equity Incentive Plan and the applicable award agreement. /s/ Zoran Zdraveski, Attorney-in-Fact 2026-10-02