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Loss per Share | 9 Months Ended
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Sep. 30, 2025
Earnings Per Share [Abstract] |
Loss Per Share | 16. LOSS PER SHARE Basic net loss per share is computed by dividing net income by basic weighted-average shares outstanding during the period. Diluted net income per share is computed by dividing net income by diluted weighted-average shares outstanding during the period giving effect to all potentially dilutive securities to the extent they are dilutive. We compute the dilutive effect of shares issuable upon conversion of our 2030 notes using the if-converted method and equity awards under our employee equity incentive plans using the treasury stock method.
|  | Three Months Ended |  |  | Nine Months Ended |
|  | September 30, |  |  | September 30, |
(In thousands, except per share amounts) |  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |
|  |  |  |  | (Restated) |  |  |  |  |  | (Restated) |
Numerator |  |  |  |  |  |  |  |  |  |  |  |
Net loss attributable to ADTRAN Holdings, Inc. |  | $ | (10,262 | ) |  | $ | (33,348 | ) |  | $ | (42,060 | ) |  | $ | (413,780 | )
Effect of redemption of RNCI |  |  | 519 |  |  |  | 2,976 |  |  |  | 2,010 |  |  |  | 2,976 |
Net loss attributable to ADTRAN Holdings, Inc. common stockholders |  | $ | (9,743 | ) |  | $ | (30,372 | ) |  | $ | (40,050 | ) |  | $ | (410,804 | )
Denominator |  |  |  |  |  |  |  |  |  |  |  |
Weighted average number of shares – basic |  |  | 79,803 |  |  |  | 78,952 |  |  |  | 79,696 |  |  |  | 78,873 |
Weighted average number of shares – diluted |  |  | 79,803 |  |  |  | 78,952 |  |  |  | 79,696 |  |  |  | 78,873 |
Loss per share attributable to ADTRAN Holdings, Inc. – basic |  | $ | (0.12 | ) |  | $ | (0.38 | ) |  | $ | (0.50 | ) |  | $ | (5.21 | )
Loss per share attributable to ADTRAN Holdings, Inc. – diluted |  | $ | (0.12 | ) |  | $ | (0.38 | ) |  | $ | (0.50 | ) |  | $ | (5.21 | )
The following potentially dilutive shares were excluded from the calculation of the diluted weighted average number of shares outstanding as the effect would have been anti-dilutive:
|  | Three Months Ended |  |  | Nine Months Ended |
|  | September 30, |  |  | September 30, |
(In thousands) |  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |
Convertible senior notes |  |  | 2,089 |  |  |  | — |  |  |  | 704 |  |  |  | — |
Stock options |  |  | 814 |  |  |  | 4,006 |  |  |  | 921 |  |  |  | 4,163 |
PSUs, RSUs and restricted stock |  |  | 967 |  |  |  | 921 |  |  |  | 913 |  |  |  | 1,136 |
In connection with the offering of the 2030 Notes, the Company entered into Capped Calls which are intended to reduce or offset the potential dilution from shares of common stock issued upon conversion. The impact of the Capped Calls is not included when calculating potentially dilutive shares since their effect is anti-dilutive. See Note 12, Convertible Senior Notes and Capped Calls for additional information.

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