Common Stock (Tables)

3 Months Ended

Mar. 31, 2026

Common Stock [Abstract]

Summary Of Components Used To Calculate Basic And Diluted Income Per Share

Presented below is a summary of the components used to calculate basic and diluted income per share. The Company applies the two-class method of computing income per share, as nonvested restricted stock awards that pay nonforfeitable common stock dividends are considered securities which participate in undistributed earnings with common stock. The two-class method requires the calculation of separate income per share amounts for the nonvested restricted stock awards and for common stock. Income per share attributable to common stock is shown in the table below. Nonvested share-based awards are further discussed in Note 14.

	For the Three Months Ended March 31
(In thousands, except per share data)	2026		2025
Basic income per common share:
Net income attributable to Commerce Bancshares, Inc.	$	141,623	$	131,592
Less income allocated to nonvested restricted stock awards	1,314		1,259
Net income allocated to common stock	$	140,309	$	130,333
Weighted average common shares outstanding	145,786		139,563
Basic income per common share	$	.96	$	.93
Diluted income per common share:
Net income attributable to Commerce Bancshares, Inc.	$	141,623	$	131,592
Less income allocated to nonvested restricted stock awards	1,313		1,258
Net income allocated to common stock	$	140,310	$	130,334
Weighted average common shares outstanding	145,786		139,563
Net effect of assumed exercise of stock appreciation rights and restricted stock units - based on the treasury stock method using the average market price for the respective periods	71		162
Weighted average diluted common shares outstanding	145,857		139,725
Diluted income per common share	$	.96	$	.93