X0508 4 2025-10-01 0001776738 Cannabist Co Holdings Inc. CBSTF 0001243394 HILL JULIE A C/O CANNABIST CO HOLDINGS INC. 321 BILLERICA ROAD CHELMSFORD MA 01824 true false Restricted Stock Units 2025-10-01 4 A 0 1545455 0 A Common Shares 1545455 1545455 D Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock. The RSUs were granted on October 1, 2025, and will vest on the date of the Issuer's 2026 annual meeting. Settlement will occur as soon as administratively feasible following the vesting date. /s/ David Sirolly as attorney-in-fact for Julie Hill 2025-10-03