Nikos Theodosopoulos - Nov 26, 2025 Form 4 Insider Report for ADTRAN Holdings, Inc. (ADTN)

Role: Director
Signature: /s/ Dan Ragsdale, by power of attorney
Stock symbol: ADTN
Transactions as of: Nov 26, 2025
Transactions value $: $100,429
Form type: 4
Date filed: 12/1/2025, 12:00 PM
Previous filing: May 9, 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Theodosopoulos Nikos	Director	C/O ADTRAN HOLDINGS, INC., 901 EXPLORER BOULEVARD, HUNTSVILLE	/s/ Dan Ragsdale, by power of attorney	2025-12-01	0001605860

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	ADTN	Common Stock	Purchase	$100K	+12.9K	+32.72%	$7.81	52.2K	Nov 26, 2025	Direct	F1

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $7.75 to $8.00, inclusive. The reporting person undertakes to provide to ADTRAN Holdings, Inc. (the Issuer), any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote (1) to this Form 4.

Content

The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $7.75 to $8.00, inclusive. The reporting person undertakes to provide to ADTRAN Holdings, Inc. (the Issuer), any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote (1) to this Form 4.