X0306 4 2021-06-04 0 0001720580 Adicet Bio, Inc. ACET 0001823996 Galimi Francesco C/O ADICET BIO, INC. 500 BOYLSTON STREET, 13TH FLOOR BOSTON MA 02116 0 1 0 0 SVP & Chief Medical Officer Common Stock 2021-06-04 4 M 0 6983 5.97 A 6983 D Employee Stock Option (Right to Buy) 5.97 2021-06-04 4 M 0 6983 D 2029-10-15 Common Stock 6983 121441 D 25% of the option vested on September 23, 2020, and 1/36th of the remaining unvested option vests on each of the next thirty-six (36) monthly anniversaries thereafter, provided that Dr. Galimi remains in continuous service as of the applicable vesting date. Received in exchange for an employee stock option to acquire 1,035,685 shares of common stock of Adicet Bio, Inc., a Delaware corporation ("Old Adicet"), for $0.740 per share in connection with the merger (the "Merger") of Old Adicet with and into Project Oasis Merger Sub, Inc., a Delaware corporation and a wholly owned subsidiary of resTORbio, Inc., a Delaware corporation ("resTORbio"). On the effective date of the Merger, resTORbio changed its name to "Adicet Bio, Inc." /s/ Nick Harvey, Attorney-in-Fact 2021-06-08