EQS Voting Rights Announcement: ADTRAN Holdings, Inc.
Adtran Holdings, Inc.: Release according to Article 40, Section 1 of the WpHG [the German Securities Trading Act] with the objective of Europe-wide distribution
13.10.2025 / 20:37 CET/CEST
Dissemination of a Voting Rights Announcement transmitted by EQS News – a service of EQS Group.
The issuer is solely responsible for the content of this announcement.
Notification of Major Holdings
1. Details of issuer Name: Adtran Holdings, Inc. Street: 901 Explorer Boulevard Postal code: 35806 City: Huntsville
United States Legal Entity Identifier (LEI): 549300VV36J86CRRWF77
2. Reason for notification X Acquisition/disposal of shares with voting rights Acquisition/disposal of instruments Change of breakdown of voting rights X Other reason:
voluntary group notification with triggered threshold on subsidiary level
3. Details of person subject to the notification obligation Legal entity: Morgan Stanley
City of registered office, country: Wilmington, Delaware, United States of America (USA)
4. Names of shareholder(s)
holding directly 3% or more voting rights, if different from 3.
5. Date on which threshold was crossed or reached: 07 Oct 2025
6. Total positions % of voting rights attached to shares
(total of 7.a.) % of voting rights through instruments
(total of 7.b.1 + 7.b.2) Total of both in %
(7.a. + 7.b.) Total number of voting rights pursuant to Sec. 41 WpHG New 3.39 % 2.54 % 5.94 % 80093032 Previous notification 3.01 % 2.51 % 5.52 % /
7. Details on total positions
a. Voting rights attached to shares (Sec. 33, 34 WpHG) ISIN Absolute In % Direct
(Sec. 33 WpHG) Indirect
(Sec. 34 WpHG) Direct
(Sec. 33 WpHG) Indirect
(Sec. 34 WpHG) US00486H1059 0 2716130 0 % 3.39 % Total 2716130 3.39 %
b.1. Instruments according to Sec. 38 (1) no. 1 WpHG Type of instrument Expiration or maturity date Exercise or conversion period Voting rights absolute Voting rights in % Right of recall over securities lending agreements at any time at any time 2038198 2.54 % Total 2038198 2.54 %
b.2. Instruments according to Sec. 38 (1) no. 2 WpHG Type of instrument Expiration or maturity date Exercise or conversion period Cash or physical settlement Voting rights absolute Voting rights in % 0 0 % Total 0 0 %
8. Information in relation to the person subject to the notification obligation
Person subject to the notification obligation is not controlled nor does it control any other undertaking(s) that directly or indirectly hold(s) an interest in the (underlying) issuer (1.). X Full chain of controlled undertakings starting with the ultimate controlling natural person or legal entity:
Name % of voting rights (if at least 3% or more) % of voting rights through instruments (if at least 5% or more) Total of both (if at least 5% or more) Morgan Stanley % % % Morgan Stanley Capital Management, LLC % % % Morgan Stanley Domestic Holdings, LLC % % % Morgan Stanley Capital Services LLC % % % – % % % Morgan Stanley % % % Morgan Stanley Capital Management, LLC % % % Morgan Stanley & Co. LLC % % % – % % % Morgan Stanley % % % Morgan Stanley International Holdings Inc. % % % Morgan Stanley International Limited % % % Morgan Stanley Investments (UK) % % % Morgan Stanley & Co. International plc % % % – % % % Morgan Stanley % % % Morgan Stanley Capital Management, LLC % % % Morgan Stanley & Co. LLC % % % Prime Dealer Services Corp. % % % – % % % Morgan Stanley % % % Morgan Stanley Capital Management, LLC % % % Morgan Stanley Bank, N.A. % % % – % % % Morgan Stanley % % % Morgan Stanley Capital Management, LLC % % % Morgan Stanley Smith Barney LLC % % %
9. In case of proxy voting according to Sec. 34 para. 3 WpHG
(only in case of attribution of voting rights in accordance with Sec. 34 para. 1 sent. 1 No. 6 WpHG)
Date of general meeting:
Holding total positions after general meeting (6.) after annual general meeting:
Proportion of voting rights Proportion of instruments Total of both % % %
10. Other explanatory remarks:
The notification was triggered in part due to an acquisition of shares with voting rights in addition to an acquisition of client securities over which Morgan Stanley & Co. LLC has a right of use.
Date
13 Oct 2025
13.10.2025 CET/CEST The EQS Distribution Services include Regulatory Announcements, Financial/Corporate News and Press Releases.
Archive at http://www.eqs-news.com
Language: English Company: Adtran Holdings, Inc. 901 Explorer Boulevard 35806 Huntsville United States Internet: http://www.adtran.com
End of News EQS News Service
2212268 13.10.2025 CET/CEST
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