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Loss per Share (Tables)
 12 Months Ended
Dec. 31, 2023
Earnings Per Share [Abstract]  
Summary of Calculations of Basic and Diluted Loss Per Share

The calculations of basic and diluted loss per share for the years ended December 31, 2023, 2022 and 2021 are as follows:

(In thousands, except for per share amounts)

 

2023

 

 

2022

 

 

2021

 

Numerator

 

 

 

 

 

 

 

 

 

Net Loss attributable to ADTRAN Holdings, Inc.

 

$

(267,688

)

 

$

(2,037

)

 

$

(8,635

)

Denominator

 

 

 

 

 

 

 

 

 

Weighted average number of shares – basic

 

 

78,416

 

 

 

62,346

 

 

 

48,582

 

Effect of dilutive securities:

 

 

 

 

 

 

 

 

 

Stock options

 

 

—

 

 

 

—

 

 

 

—

 

PSUs, RSUs and restricted stock

 

 

—

 

 

 

—

 

 

 

—

 

Weighted average number of shares – diluted

 

 

78,416

 

 

 

62,346

 

 

 

48,582

 

Loss per share attributable to ADTRAN Holdings, Inc. – basic

 

$

(3.41

)

 

$

(0.03

)

 

$

(0.18

)

Loss per share attributable to ADTRAN Holdings, Inc. – diluted

 

$

(3.41

)

 

$

(0.03

)

 

$

(0.18

)