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Condensed Consolidated Statements of Loss (Unaudited) - USD ($)
shares in Thousands
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Revenue    
Total Revenue $ 247,744,000 $ 226,173,000
Cost of Revenue    
Total Cost of Revenue 152,568,000 155,858,000
Gross Profit 95,176,000 70,315,000
Selling, general and administrative expenses 50,285,000 58,991,000
Research and development expenses 48,859,000 60,215,000
Goodwill impairment 0 297,353,000
Operating Loss (3,968,000) (346,244,000)
Interest and dividend income 126,000 397,000
Interest expense (4,761,000) (4,598,000)
Net investment (loss) gain (1,686,000) 2,253,000
Other income, net 944,000 1,310,000
Loss Before Income Taxes (9,345,000) (346,882,000)
Income tax benefit 397,000 18,647,000
Net Loss (8,948,000) (328,235,000)
Less: Net Income attributable to non-controlling interest [1] 2,319,000 2,530,000
Net Loss attributable to ADTRAN Holdings, Inc. $ (11,267,000) $ (330,765,000)
Weighted average shares outstanding – basic 79,534 78,814
Weighted average shares outstanding – diluted 79,534 78,814
Loss per common share attributable to ADTRAN Holdings, Inc. - basic $ (0.14) [2] $ (4.2)
Loss per common share attributable to ADTRAN Holdings, Inc. - diluted $ (0.14) [2] $ (4.2)
Network Solutions [Member]    
Revenue    
Total Revenue $ 202,217,000 $ 181,273,000
Cost of Revenue    
Total Cost of Revenue 134,241,000 128,266,000
Gross Profit 67,976,000 44,225,000
Goodwill impairment   297,400,000
Network Solutions Charges and Inventory Write-Down [Member]    
Cost of Revenue    
Total Cost of Revenue   8,782,000
Services & Support [Member]    
Revenue    
Total Revenue 45,527,000 44,900,000
Cost of Revenue    
Total Cost of Revenue 18,327,000 18,810,000
Gross Profit $ 27,200,000 $ 26,090,000
[1] For the three months ended March 31, 2025, we accrued $2.4 million net income attributable to non-controlling interest, representing the recurring cash compensation earned by non-controlling interest shareholders post-DPLTA. For the three months ended March 31, 2024, we recognized $2.5 million of net gain attributable to non-controlling interest, representing the recurring cash compensation earned by non-controlling interest shareholders post DPTLA.
[2] Loss per common share attributable to ADTRAN Holdings, Inc. - basic and diluted - reflects a $(3) thousand effect of redemption of RNCI for the three months ended March 31, 2025. See Note 14 for additional information.