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

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

07.07.2024 / 13:38 CET/CEST
Dissemination of a Voting Rights Announcement transmitted by EQS News - a
service of EQS Group AG.
The issuer is solely responsible for the content of this announcement.

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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: BlackRock, Inc.
     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.

iShares Trust

5. Date on which threshold was crossed or reached:

02 Jul 2024

6. Total positions

               % of voting  % of voting rights   Total of  Total number of
           rights attached             through  both in %    voting rights
                 to shares  instruments (total    (7.a. +      pursuant to
           (total of 7.a.)   of 7.b.1 + 7.b.2)      7.b.)     Sec. 41 WpHG
  New               8.19 %              0.17 %     8.36 %         79120735
  Previo-           7.89 %              1.48 %     9.37 %                /
  us
  notifi-
  cation

7. Details on total positions
a. Voting rights attached to shares (Sec. 33, 34 WpHG)

    ISIN            Absolute                       In %
                  Direct (Sec.  Indirect (Sec.  Direct (Sec.  Indirect
                      33 WpHG)        34 WpHG)      33 WpHG)  (Sec. 34
                                                                 WpHG)
    US00486H1059             0         6479863           0 %    8.19 %
    Total           6479863                       8.19 %

b.1. Instruments according to Sec. 38 (1) no. 1 WpHG

    Type of          Expiration or  Exercise or    Voting     Voting
    instrument       maturity date  conversion     rights  rights in
                                    period       absolute          %
    Lent Securities  N/A            N/A             43679     0.06 %
    (right to
    recall)
                                    Total           43679     0.06 %

b.2. Instruments according to Sec. 38 (1) no. 2 WpHG

    Type of     Expiration   Exercise or  Cash or       Voting  Voting
    instrument  or maturity  conversion   physical      rights  rights
                date         period       settlement  absolute    in %
    Contract    N/A          N/A          Cash           93036  0.12 %
    for
    Difference
                                          Total          93036  0.12 %

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   % of voting rights     Total of
                         rights (if at  through instruments  both (if at
                           least 3% or   (if at least 5% or  least 5% or
                                 more)                more)        more)
    BlackRock, Inc.                  %                    %            %
    Trident Merger LLC               %                    %            %
    BlackRock                        %                    %            %
    Investment
    Management, LLC
    -                                %                    %            %
    BlackRock, Inc.                  %                    %            %
    BlackRock Holdco 2,              %                    %            %
    Inc.
    BlackRock Financial              %                    %            %
    Management, Inc.
    -                                %                    %            %
    BlackRock, Inc.                  %                    %            %
    BlackRock Holdco 2,              %                    %            %
    Inc.
    BlackRock Financial              %                    %            %
    Management, Inc.
    BlackRock Capital                %                    %            %
    Holdings, Inc.
    BlackRock Advisors,              %                    %            %
    LLC
    -                                %                    %            %
    BlackRock, Inc.                  %                    %            %
    Trident Merger LLC               %                    %            %
    BlackRock                        %                    %            %
    Investment
    Management, LLC
    Amethyst                         %                    %            %
    Intermediate LLC
    Aperio Holdings LLC              %                    %            %
    Aperio Group, LLC                %                    %            %
    -                                %                    %            %
    BlackRock, Inc.                  %                    %            %
    BlackRock Holdco 2,              %                    %            %
    Inc.
    BlackRock Financial              %                    %            %
    Management, Inc.
    BlackRock                        %                    %            %
    International
    Holdings, Inc.
    BlackRock Canada                 %                    %            %
    Holdings ULC
    BlackRock Asset                  %                    %            %
    Management Canada
    Limited
    -                                %                    %            %
    BlackRock, Inc.                  %                    %            %
    BlackRock Holdco 2,              %                    %            %
    Inc.
    BlackRock Financial              %                    %            %
    Management, Inc.
    BlackRock Holdco 4,              %                    %            %
    LLC
    BlackRock Holdco 6,              %                    %            %
    LLC
    BlackRock Delaware               %                    %            %
    Holdings Inc.
    BlackRock                        %                    %            %
    Institutional Trust
    Company, National
    Association
    -                                %                    %            %
    BlackRock, Inc.                  %                    %            %
    BlackRock Holdco 2,              %                    %            %
    Inc.
    BlackRock Financial              %                    %            %
    Management, Inc.
    BlackRock Holdco 4,              %                    %            %
    LLC
    BlackRock Holdco 6,              %                    %            %
    LLC
    BlackRock Delaware               %                    %            %
    Holdings Inc.
    BlackRock Fund              4.03 %                    %            %
    Advisors
    -                                %                    %            %
    BlackRock, Inc.                  %                    %            %
    BlackRock Holdco 2,              %                    %            %
    Inc.
    BlackRock Financial              %                    %            %
    Management, Inc.
    BlackRock Holdco 4,              %                    %            %
    LLC
    BlackRock Holdco 6,              %                    %            %
    LLC
    BlackRock Delaware               %                    %            %
    Holdings Inc.
    BlackRock                        %                    %            %
    Institutional Trust
    Company, National
    Association
    SAE Liquidity Fund               %                    %            %
    (GenPar), LLC
    -                                %                    %            %
    BlackRock, Inc.                  %                    %            %
    BlackRock Holdco 2,              %                    %            %
    Inc.
    BlackRock Financial              %                    %            %
    Management, Inc.
    BlackRock                        %                    %            %
    International
    Holdings, Inc.
    BR Jersey                        %                    %            %
    International
    Holdings L.P.
    BlackRock Holdco 3,              %                    %            %
    LLC
    BlackRock Cayman 1               %                    %            %
    LP
    BlackRock Cayman                 %                    %            %
    West Bay Finco
    Limited
    BlackRock Cayman                 %                    %            %
    West Bay IV Limited
    BlackRock Group                  %                    %            %
    Limited
    BlackRock Finance                %                    %            %
    Europe Limited
    BlackRock                        %                    %            %
    Investment
    Management (UK)
    Limited
    -                                %                    %            %
    BlackRock, Inc.                  %                    %            %
    BlackRock Holdco 2,              %                    %            %
    Inc.
    BlackRock Financial              %                    %            %
    Management, Inc.
    BlackRock                        %                    %            %
    International
    Holdings, Inc.
    BR Jersey                        %                    %            %
    International
    Holdings L.P.
    BlackRock Holdco 3,              %                    %            %
    LLC
    BlackRock Cayman 1               %                    %            %
    LP
    BlackRock Cayman                 %                    %            %
    West Bay Finco
    Limited
    BlackRock Cayman                 %                    %            %
    West Bay IV Limited
    BlackRock Group                  %                    %            %
    Limited
    BlackRock Finance                %                    %            %
    Europe Limited
    BlackRock Advisors               %                    %            %
    (UK) Limited
    -                                %                    %            %

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    Proportion of    Total of
                   rights      instruments        both
                        %                %           %

10. Other explanatory remarks:



Date

05 Jul 2024


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07.07.2024 CET/CEST The EQS Distribution Services include Regulatory
Announcements, Financial/Corporate News and Press Releases.
Archive at www.eqs-news.com

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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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1940851 07.07.2024 CET/CEST