Condensed Consolidated Statements of Loss (Unaudited) - USD ($) shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 31, 2026	Mar. 31, 2025
Revenue
Total Revenue		$ 286,086	$ 247,744
Cost of Revenue
Total Cost of Revenue		173,098	152,568
Gross Profit		112,988	95,176
Selling, general and administrative expenses		55,836	50,285
Research and development expenses		50,777	48,859
Operating Income (Loss)		6,375	(3,968)
Interest and dividend income		300	126
Interest expense		(4,241)	(4,761)
Net investment loss		(850)	(1,686)
Other income, net		1,263	944
Income (Loss) Before Income Taxes		2,847	(9,345)
Income tax (expense) benefit		(1,917)	397
Net Income (Loss)		930	(8,948)
Less: Net Income attributable to non-controlling interest	[1]	2,251	2,319
Net Loss attributable to ADTRAN Holdings, Inc.		$ (1,321)	$ (11,267)
Weighted average shares outstanding – basic		80,321	79,534
Weighted average shares outstanding – diluted		80,321	79,534
Loss per common share attributable to ADTRAN Holdings, Inc. - basic	[2]	$ (0.01)	$ (0.14)
Loss per common share attributable to ADTRAN Holdings, Inc. - diluted	[2]	$ (0.01)	$ (0.14)
Network Solutions [Member]
Revenue
Total Revenue		$ 237,941	$ 202,217
Cost of Revenue
Total Cost of Revenue		154,648	134,241
Gross Profit		83,293	67,976
Services & Support [Member]
Revenue
Total Revenue		48,145	45,527
Cost of Revenue
Total Cost of Revenue		18,450	18,327
Gross Profit		$ 29,695	$ 27,200

[1] For the three months ended March 31, 2026 and 2025 we accrued $2.2 million and $2.4 million, respectively, of net income attributable to non-controlling interest, 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 $0.3 million and a $(3) thousand effect of redemption of RNCI for the three months ended March 31, 2026 and 2025. See Note 15 for additional information.