Condensed Consolidated Statements of Loss (Unaudited) - USD ($) shares in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2024
Revenue
Total Revenue		$ 265,068,000	$ 225,991,000	$ 452,164,000
Cost of Revenue
Total Cost of Revenue		166,144,000	144,732,000	300,590,000
Gross Profit		98,924,000	81,259,000	151,574,000
Selling, general and administrative expenses		60,347,000	59,364,000	118,355,000
Research and development expenses		51,895,000	60,352,000	120,567,000
Goodwill impairment		0	0	297,353,000
Operating Loss		(13,318,000)	(38,457,000)	(384,701,000)
Interest and dividend income		201,000	366,000	763,000
Interest expense		(4,564,000)	(6,906,000)	(11,504,000)
Net investment gain		3,075,000	872,000	3,125,000
Other (expense) income, net		(2,636,000)	(901,000)	409,000
Loss Before Income Taxes		(17,242,000)	(45,026,000)	(391,908,000)
Income tax (expense) benefit		(1,016,000)	(2,136,000)	16,511,000
Net Loss		(18,258,000)	(47,162,000)	(375,397,000)
Less: Net Income attributable to non-controlling interest	[1]	2,273,000	2,505,000	5,035,000
Net Loss attributable to ADTRAN Holdings, Inc.		$ (20,531,000)	$ (49,667,000)	$ (380,432,000)
Weighted average shares outstanding – basic		79,748	78,852	78,803
Weighted average shares outstanding – diluted		79,748	78,852	78,803
Loss per common share attributable to ADTRAN Holdings, Inc. - basic	[2]	$ (0.24)	$ (0.63)	$ (4.83)
Loss per common share attributable to ADTRAN Holdings, Inc. - diluted	[2]	$ (0.24)	$ (0.63)	$ (4.83)
Network Solutions [Member]
Revenue
Total Revenue		$ 219,498,000	$ 179,194,000	$ 360,467,000
Cost of Revenue
Total Cost of Revenue		147,321,000	124,773,000	253,039,000
Gross Profit		72,177,000	54,278,000	98,503,000
Network Solutions - Charges and Inventory Write-Down [Member]
Cost of Revenue
Total Cost of Revenue		0	143,000	8,925,000
Services & Support [Member]
Revenue
Total Revenue		45,570,000	46,797,000	91,697,000
Cost of Revenue
Total Cost of Revenue		18,823,000	19,816,000	38,626,000
Gross Profit		$ 26,747,000	$ 26,981,000	$ 53,071,000

[1] For the three and six months ended June 30, 2025 we accrued $2.4 million and $4.8 million, respectively, net income attributable to non-controlling interest, representing the recurring cash compensation earned by non-controlling interest shareholders post-DPLTA. For the three and six months ended June 30, 2024, we accrued $2.5 million and $5.0 million, respectively, representing the recurring cash compensation earned by non-controlling interest shareholders post-DPLTA.

[2] Loss per common share attributable to ADTRAN Holdings, Inc. - basic and diluted - reflects a $1.5 million effect of redemption of RNCI for the three and six months ended June 30, 2025. See Note 14 for additional information.