Year Ended December 31,

2022

2021

2020

Net earnings (loss) attributable to Kirby

$

122,291

$

(246,954

)

$

(272,546

)

Undistributed earnings allocated to restricted shares

(33

)

—

—

Earnings (loss) available to Kirby common stockholders — basic

122,258

(246,954

)

(272,546

)

Undistributed earnings allocated to restricted shares

33

—

—

Undistributed earnings reallocated to restricted shares

(33

)

—

—

Earnings (loss) available to Kirby common stockholders — diluted

$

122,258

$

(246,954

)

$

(272,546

)

Shares outstanding:

Weighted average common stock issued and outstanding

60,055

60,099

60,021

Weighted average unvested restricted stock

(17

)

(46

)

(109

)

Weighted average common stock outstanding — basic

60,038

60,053

59,912

Dilutive effect of stock options and restricted stock units

291

—

—

Weighted average common stock outstanding — diluted

60,329

60,053

59,912

Net earnings (loss) per share attributable to Kirby common stockholders:

Basic

$

2.04

$

(4.11

)

$

(4.55

)

Diluted

$

2.03

$

(4.11

)

$

(4.55

)