Earnings Per Share

12 Months Ended

Dec. 31, 2024

(10) Earnings Per Share

The following table presents the components of basic and diluted earnings per share (in thousands, except per share amounts):


	Year Ended December 31,
	2024			2023			2022
Net earnings attributable to Kirby	$	286,707		$	222,935		$	122,291
Undistributed earnings allocated to restricted shares		(37	)		(62	)		(33	)
Earnings available to Kirby common stockholders — basic		286,670			222,873			122,258
Undistributed earnings allocated to restricted shares		37			62			33
Undistributed earnings reallocated to restricted shares		(36	)		(62	)		(33	)
Earnings available to Kirby common stockholders — diluted	$	286,671		$	222,873		$	122,258

Shares outstanding:
Weighted average common stock issued and outstanding		57,954			59,548			60,055
Weighted average unvested restricted stock		(7	)		(17	)		(17	)
Weighted average common stock outstanding — basic		57,947			59,531			60,038
Dilutive effect of stock options and restricted stock units		408			326			291
Weighted average common stock outstanding — diluted		58,355			59,857			60,329

Net earnings per share attributable to Kirby common stockholders:
Basic	$	4.95		$	3.74		$	2.04
Diluted	$	4.91		$	3.72		$	2.03

Diluted earnings per share was computed using the treasury stock method. Certain outstanding options to purchase approximately 33,000, and 381,000 shares of common stock were excluded in the computation of diluted earnings per share as of December 31, 2023, and 2022, respectively, as such stock options would have been antidilutive. No options were antidilutive at December 31, 2024. No RSUs were antidilutive at December 31, 2024, 2023 and 2022.