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Loss per Share | 3 Months Ended
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Mar. 31, 2025
Earnings Per Share [Abstract] |
Loss per Share | 14. LOSS PER SHARE The calculation of basic and diluted loss per share is as follows:
|  | Three Months Ended |
|  | March 31, |
(In thousands, except per share amounts) |  | 2025 |  |  | 2024 |
|  |  |  |  | (Restated) |
Numerator |  |  |  |  |  |
Net loss attributable to ADTRAN Holdings, Inc. |  | $ | (11,267 | ) |  | $ | (330,765 | )
Effect of redemption of RNCI |  |  | (3 | ) |  |  | — |
Net loss attributable to ADTRAN Holdings, Inc. common stockholders |  | $ | (11,270 | ) |  | $ | (330,765 | )
Denominator |  |  |  |  |  |
Weighted average number of shares – basic |  |  | 79,534 |  |  |  | 78,814 |
Effect of dilutive securities |  |  |  |  |  |
Stock options |  |  | — |  |  |  | — |
PSUs, RSUs and restricted stock |  |  | — |  |  |  | — |
Weighted average number of shares – diluted |  |  | 79,534 |  |  |  | 78,814 |
Loss per share attributable to ADTRAN Holdings, Inc. – basic |  | $ | (0.14 | ) |  | $ | (4.20 | )
Loss per share attributable to ADTRAN Holdings, Inc. – diluted |  | $ | (0.14 | ) |  | $ | (4.20 | )
For the three months ended March 31, 2025 and 2024, 0.2 million and 1.1 million shares, respectively, of unvested PSUs, RSUs and restricted stock were excluded from the calculation of diluted earnings per share due to their anti-dilutive effect. For the three months ended March 31, 2025 and 2024, 0.7 million and 3.5 million stock options, respectively, were outstanding but were not included in the computation of diluted earnings per share. Thes e stock options were excluded because their exercise prices were greater than the average market price of the common shares during the applicable period, making them anti-dilutive under the treasury stock method.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482662/260-10-50-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 260 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/260/tableOfContent Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482662/260-10-50-2 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482662/260-10-50-3 + Details
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