Loss Per Share

3 Months Ended

Mar. 31, 2026

Earnings Per Share [Abstract]

Loss Per Share

15. LOSS PER SHARE

The calculation of basic and diluted loss per share for the quarters ended March 31, 2026 and 2025 are as follows:

	Three Months Ended
	March 31,
(In thousands, except per share amounts)	2026			2025
Numerator
Net loss attributable to ADTRAN Holdings, Inc.	$	(1,321	)	$	(11,267	)
Effect of redemption of RNCI		301			(3	)
Net loss attributable to ADTRAN Holdings, Inc. common stockholders	$	(1,020	)	$	(11,270	)
Denominator
Weighted average number of shares – basic		80,321			79,534
Weighted average number of shares – diluted		80,321			79,534
Loss per share attributable to ADTRAN Holdings, Inc. – basic	$	(0.01	)	$	(0.14	)
Loss per share attributable to ADTRAN Holdings, Inc. – diluted	$	(0.01	)	$	(0.14	)

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
	March 31,
(In thousands)	2026		2025
Convertible senior notes		2,440		—
Stock options		794		711
PSUs, RSUs and restricted stock		446		202