X0306 4 2023-02-28 0000022356 COMMERCE BANCSHARES INC /MO/ CBSH 0001678319 Petersen Paula S 1000 WALNUT ST. KANSAS CITY MO 64106 1 Senior Vice President Common Stock 2023-02-28 4 M 0 2201 23.9549 A 33268 D Common Stock 2023-02-28 4 F 0 428 66.96 D 32840 D Common Stock 2023-02-28 4 D 0 788 66.96 D 32052 D Common Stock 4214 I 401(k) Stock Appreciation Rights 23.9549 2023-02-28 4 M 0 2201 0 D 2014-04-17 2023-04-17 Common Stock 2201 0 D This stock appreciation right vests in four equal annual installments beginning on March 1, 2020. /s/ Paul A. Steiner for Paula S. Petersen 2023-03-01