Adtran Holdings, Inc., US00486H1059

Adtran Holdings, Inc., US00486H1059

05.08.2022 - 15:42:57

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

Notification of Major Holdings

1. Details of issuer Name: Adtran Holdings, Inc. Street: 901 Explorer Boulevard Postal code: 35806 City: HuntsvilleUnited States Legal Entity Identifier (LEI): 549300VV36J86CRRWF77 2. Reason for notification ? Acquisition/disposal of shares with voting rights ? Acquisition/disposal of instruments ? Change of breakdown of voting rights X Other reason:exercise of instruments 3. Details of person subject to the notification obligation Legal entity: Morgan StanleyCity 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: 02 Aug 2022 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 2.61 % 2.33 % 4.94 % 78849048 Previous notification 2.39 % 2.9 % 5.28 % / 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 2054700 0 % 2.61 % Total 2054700 2.61 % 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 % Equity Call Option 19.08.2022 at any time 400 0 % Right of recall over securities lending agreements at any time at any time 1735253 2.2 % ? ? Total 1735653 2.2 % 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 % Equity Swap 28.06.2023 at any time Cash 102315 0.13 % Equity Put Option 19.08.2022 at any time Physical 1300 0 % ? ? ? Total 103615 0.13 % 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, Inc. % % % Morgan Stanley Capital Services LLC % % % - % % % Morgan Stanley % % % Morgan Stanley Capital Management, LLC % % % Morgan Stanley Domestic Holdings, Inc. % % % 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 Domestic Holdings, Inc. % % % Morgan Stanley & Co. LLC % % % Prime Dealer Services Corp. % % % - % % % Morgan Stanley % % % Morgan Stanley Capital Management, LLC % % % Morgan Stanley Domestic Holdings, Inc. % % % Morgan Stanley Smith Barney LLC % % % - % % % Morgan Stanley % % % Morgan Stanley Capital Management, LLC % % % Morgan Stanley Domestic Holdings, Inc. % % % ETCM Holdings, LLC % % % E*TRADE Securities 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:? Date05 Aug 2022

05.08.2022 CET/CEST The DGAP Distribution Services include Regulatory Announcements, Financial/Corporate News and Press Releases.Archive at www.dgap.de

Language: English Company: Adtran Holdings, Inc. 901 Explorer Boulevard 35806 Huntsville

United States Internet: www.adtran.com ? End of News DGAP News Service

1414683??05.08.2022?CET/CEST

@ dgap.de