Certain Non-Voting Common Stock of TScan Therapeutics, Inc. are subject to a Lock-Up Agreement Ending on 17-JUN-2024. These Non-Voting Common Stock will be under lockup for 61 days starting from 17-APR-2024 to 17-JUN-2024.

Details:
The directors and officers have agreed that, without the prior written consent of Morgan Stanley & Co. LLC and TD Securities (USA) LLC, on behalf of the underwriters, will not publicly disclose an intention to, during the period ending 60 days after the date of this prospectus supplement.