EQS-CMS: Adtran Holdings, Inc.: Release according to Article 50 of the WpHG [the German Securities Trading Act] with the objective of Europe-wide distribution

EQS Post-admission Duties announcement: Adtran Holdings, Inc. / Third country release according to Article 50 Para. 1, No. 2 of the WpHG [the German Securities Trading Act]
Adtran Holdings, Inc.: Release according to Article 50 of the WpHG [the German Securities Trading Act] with the objective of Europe-wide distribution

01.04.2026 / 17:20 CET/CEST
Dissemination of a Post-admission Duties announcement according to Article 50 Para. 1, No. 2 WpHG transmitted by EQS News - a service of EQS Group.
The issuer is solely responsible for the content of this announcement.

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On 27 March 2026, Adtran Holdings, Inc. filed with the US Securities and Exchange Commission (SEC) a form DEF 14A report; available on the SEC website https://www.sec.gov/ix?doc=/Archives/edgar/data/0000926282/000119312526127315/adtn-20260327.htm, a form DEFA 14A report; available on the SEC website https://www.sec.gov/ix?doc=/Archives/edgar/data/0000926282/000119312526127317/adtn-20260325.htm and the ARS for the period ended December 31, 2025; available on the SEC website https://www.sec.gov/Archives/edgar/data/926282/000119312526127649/adtn-2025_annual_report_.pdf .

All documents are also available on the Adtran Holdings, Inc. website at https://investors.adtran.com/sec-filings/default.aspx.

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01.04.2026 CET/CEST The EQS Distribution Services include Regulatory Announcements, Financial/Corporate News and Press Releases.
View original content: EQS News

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Language:	English
Company:	Adtran Holdings, Inc.
	901 Explorer Boulevard
	35806 Huntsville
	United States
Internet:	www.adtran.com

End of News	EQS News Service

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2302562 01.04.2026 CET/CEST