X0306 4 2021-12-06 0000022356 COMMERCE BANCSHARES INC /MO/ CBSH 0001678319 Petersen Paula S 1000 WALNUT ST. KANSAS CITY MO 64106 1 Senior Vice President Common Stock 2021-12-06 4 S 0 1282 69.4509 D 24771 D Common Stock 4042 I 401(k) Sale prices ranged from $69.44 to $69.451. All stock holding balances adjusted to include a 5% stock dividend. Record date 12/2/2021, payable 12/17/2021. /s/ Paul A. Steiner for Paula S. Petersen 2021-12-07