Earnings Per Share

6 Months Ended

Jun. 30, 2022

(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 June 30,						Six Months Ended June 30,
	2022			2021			2022			2021
Net earnings attributable to Kirby	$	28,457		$	10,190		$	45,891		$	6,815
Undistributed earnings allocated to restricted shares		(10	)		(8	)		(11	)		(6	)
Earnings available to Kirby common stockholders – basic		28,447			10,182			45,880			6,809
Undistributed earnings allocated to restricted shares		10			8			11			6
Undistributed earnings reallocated to restricted shares		(10	)		(8	)		(11	)		(6	)
Earnings available to Kirby common stockholders – diluted	$	28,447		$	10,182		$	45,880		$	6,809

Shares outstanding:
Weighted average common stock issued and outstanding		60,222			60,101			60,202			60,088
Weighted average unvested restricted stock		(20	)		(48	)		(14	)		(53	)
Weighted average common stock outstanding – basic		60,202			60,053			60,188			60,035
Dilutive effect of stock options and restricted stock units		265			221			277			185
Weighted average common stock outstanding – diluted		60,467			60,274			60,465			60,220

Net earnings per share attributable to Kirby common stockholders:
Basic	$	0.47		$	0.17		$	0.76		$	0.11
Diluted	$	0.47		$	0.17		$	0.76		$	0.11

Certain outstanding options to purchase approximately 0.4 million and 0.6 million shares of common stock were excluded in the computation of diluted earnings per share as of June 30, 2022 and 2021, respectively, as such stock options would have been antidilutive. Certain outstanding RSUs to convert to 12,000 and 5,000 shares of common stock were also excluded in the computation of diluted earnings per share as of June 30, 2022 and 2021, respectively, as such RSUs would have been antidilutive.