Earnings Per Share

9 Months Ended

Sep. 30, 2024

(9) Earnings Per Share

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


	Three Months Ended September 30,						Nine Months Ended September 30,
	2024			2023			2024			2023
Net earnings attributable to Kirby	$	89,968		$	62,964		$	243,890		$	161,029
Undistributed earnings allocated to restricted shares		(24	)		(31	)		(36	)		(50	)
Earnings available to Kirby common stockholders – basic		89,944			62,933			243,854			160,979
Undistributed earnings allocated to restricted shares		24			31			36			50
Undistributed earnings reallocated to restricted shares		(23	)		(31	)		(35	)		(50	)
Earnings available to Kirby common stockholders – diluted	$	89,945		$	62,933		$	243,855		$	160,979

Shares outstanding:
Weighted average common stock issued and outstanding		57,767			59,413			58,138			59,739
Weighted average unvested restricted stock		(14	)		(30	)		(9	)		(18	)
Weighted average common stock outstanding – basic		57,753			59,383			58,129			59,721
Dilutive effect of stock options and restricted stock units		433			363			397			312
Weighted average common stock outstanding – diluted		58,186			59,746			58,526			60,033

Net earnings per share attributable to Kirby common stockholders:
Basic	$	1.56		$	1.06		$	4.20		$	2.70
Diluted	$	1.55		$	1.05		$	4.17		$	2.68

Certain outstanding options to purchase approximately 33,000 shares of common stock were excluded in the computation of diluted earnings per share as of September 30, 2023, as such stock options would have been antidilutive. There were no antidilutive stock options as of September 30, 2024. There were no antidilutive RSUs as of September 30, 2024 and 2023.