X0306 4 2023-01-24 0 0001720580 Adicet Bio, Inc. ACET 0001519432 Harvey Brian Nicholas C/O ADICET BIO, INC. 200 BERKELEY STREET, 19TH FLOOR BOSTON MA 02116 0 1 0 0 Chief Financial Officer Common Stock 2023-01-24 4 A 0 26100 0.00 A 84916 D Stock Option (Right to Buy) 9.05 2023-01-24 4 A 0 117200 0.00 A 2033-01-23 Common Stock 117200 117200 D The Reporting Person was issued Restricted Stock Units ("RSUs"). Each RSU represents a contingent right to receive one share of Common Stock. The RSUs shall vest in three (3) annual installments, with the first tranche vesting on January 24, 2024. The RSUs may be settled only by delivering shares of Common Stock, and thus, the grant is being reported in Table I as allowed per SEC guidance. 1/48th of the shares shall vest on each of the next forty-eight (48) monthly anniversaries of the grant date, provided that the Reporting Person maintains a service relationship with the Company as of the applicable vesting dates. /s/ Nick Harvey 2023-01-26