Three Months Ended March 31,

2024

2023

Net earnings attributable to Kirby

$

70,068

$

40,698

Undistributed earnings allocated to restricted shares

(1

)

(2

)

Earnings available to Kirby common stockholders – basic

70,067

40,696

Undistributed earnings allocated to restricted shares

1

2

Undistributed earnings reallocated to restricted shares

(1

)

(2

)

Earnings available to Kirby common stockholders – diluted

$

70,067

$

40,696

Shares outstanding:

Weighted average common stock issued and outstanding

58,473

59,981

Weighted average unvested restricted stock

(1

)

(3

)

Weighted average common stock outstanding – basic

58,472

59,978

Dilutive effect of stock options and restricted stock units

347

294

Weighted average common stock outstanding – diluted

58,819

60,272

Net earnings per share attributable to Kirby common stockholders:

Basic

$

1.20

$

0.68

Diluted

$

1.19

$

0.68