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Stock-Based Compensation (Tables)
 9 Months Ended
Sep. 30, 2024
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Stock-Based Compensation Expense Related to Stock Options, PSUs, RSUs and Restricted Stock

The following table summarizes the PSUs, RSUs and restricted stock outstanding as of December 31, 2023, and September 30, 2024 and the changes that occurred during the nine months ended September 30, 2024:

 

 

 

Number of
Shares
(in thousands)

 

 

Weighted Avg. Grant Date Fair Value
(per share)

 

Unvested PSUs, RSUs and restricted stock outstanding, December 31, 2023

 

 

1,942

 

 

$

17.46

 

PSUs, RSUs and restricted stock granted

 

 

1,097

 

 

$

7.85

 

PSUs, RSUs and restricted stock vested

 

 

(263

)

 

$

18.86

 

PSUs, RSUs and restricted stock forfeited

 

 

(111

)

 

$

14.25

 

Unvested PSUs, RSUs and restricted stock outstanding, September 30, 2024

 

 

2,665

 

 

$

13.50

 
Summary of Stock Options Outstanding

The following table summarizes the ADTRAN Holdings, Inc. stock options outstanding as of December 31, 2023, and September 30, 2024, and the changes that occurred during the nine months ended September 30, 2024:

 

 

Number of
Stock Options
(in thousands)

 

 

Weighted Avg.
Exercise Price
(per share)

 

 

Weighted Avg.
Remaining
Contractual
Life
(in years)

 

 

Aggregate
Intrinsic Value
(in thousands)

 

Stock options outstanding, December 31, 2023

 

 

3,894

 

 

$

10.32

 

 

 

5.25

 

 

$

3,087

 

Stock options exercised

 

 

(36

)

 

$

6.06

 

 

 

 

 

 

 

Stock options forfeited

 

 

(171

)

 

$

6.68

 

 

 

 

 

 

 

Stock options expired

 

 

(243

)

 

$

9.31

 

 

 

 

 

 

 

Stock options outstanding, September 30, 2024

 

 

3,444

 

 

$

10.61

 

 

 

4.64

 

 

$

829

 

Stock options exercisable, September 30, 2024

 

 

1,342

 

 

$

12.63

 

 

 

1.11

 

 

$

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