REGULATED INFORMATION

               Publication relating to transparency notifications
Mont-Saint-Guibert (Belgium), June      3, 2024, 10.05pm CET      /      4.05pm

ET - In accordance with article 14 of the Act of 2 May 2007 on the disclosure of
large shareholdings, Nyxoah SA (Euronext Brussels/Nasdaq: NYXH) announces that it received four transparency notifications as detailed below.
FMR LLC
On May 30, 2024, Nyxoah received a transparency notification from FMR LLC following the crossing above the 3% threshold on May 28, 2024. As of such date, FMR LLC (together with its controlled undertakings) held 1,698,402 voting rights, consisting of 1,613,888 shares and 84,514 equivalent financial instruments, representing 4.99% of the total number of voting rights on May 28, 2024 (34,060,390).
The notification dated May 30, 2024 contains the following information:

      *  Reason for the notification: acquisition or disposal of voting
        securities or voting rights
      *  Notification by: a parent undertaking or a controlling person
      *  Persons subject to the notification requirement: FMR LLC (with address
        at The Corporation Trust Center, 1209 Orange Street, Wilmington, New
        Castle County, Delaware, 19801, U.S.A.)
      *  Date on which the threshold was crossed: May 28, 2024
      *  Threshold that is crossed: 3%
      *  Denominator: 34,060,390
      *  Notified details:

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| |Previous
|A) Voting rights|notification After the transaction
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                  # of voting
                  rights       # of voting rights           % of voting rights

Not linked Holders Linked to Not linked Linked to to the
of voting rights securities to the securities securities securities

 FMR LLC          0            0                            0.00%
 FIAM LLC         0            258                          0.00%

Fidelity
Management &
Research Company

 LLC              0            1,613,630                    4.74%
 Subtotal                      1,613,888                    4.74%
                  TOTAL        1,613,888  0                 4.74%      0.00%

+--------------+
|B) Equivalent |

|financial     |
|instruments   |After the transaction

+--------------+

                                                  # of voting
                                                  rights that
                                                  may be
                                                  acquired if
 Holders                                          the
 of equivalent    Type of               Exercise  instrument  % of
 financial       financial  Expiration  period or is          voting
 instruments    instrument  date        date      exercised   rights Settlement

Fidelity
Management &
Research

 Company LLC    Stock Loan                        84,514      0.25%  physical
                TOTAL                             84,514      0.25%
      TOTAL (A & B)   # of voting rights   % of voting rights
                      1,698,402            4.99%
      *  Full chain of controlled undertakings through which the holding is
        effectively held: FIAM LLC is controlled by FIAM Holdings LLC. FIAM
        Holdings LLC, Fidelity Management & Research Company LLC are controlled
        by FMR LLC. FMR LLC is not a controlled undertaking.
      *  Additional information: The holdings attributed to the entities
        mentioned above arise from holdings of various undertakings for
        collective investment that are managed by FIAM LLC, Fidelity Management

& Research Company LLC, each of which are entities that are subsidiaries

        of and controlled by FMR LLC. The entities mentioned above are the
        discretionary investment managers and exercise the voting rights at
        their discretion in the absence of specific instructions.

BlackRock, Inc.
On June 3, 2024, Nyxoah received a transparency notification from BlackRock, Inc. following the crossing above the 3% threshold on May 28, 2024. As of such date, BlackRock, Inc. (together with its controlled undertakings) held 1,116,429 voting rights, consisting of 1,097,929 shares and 18,500 equivalent financial instruments, representing 3.28% of the total number of voting rights on May 28, 2024 (34,060,390).
The notification dated May 29, 2024 contains the following information:

      *  Reason for the notification: acquisition or disposal of voting
        securities or voting rights
      *  Notification by: a parent undertaking or a controlling person
      *  Persons subject to the notification requirement:
          *  BlackRock, Inc. (with address at 50 Hudson Yards, New York, NY,
            10001, U.S.A.)

* BlackRock Advisors, LLC (with address at 50 Hudson Yards, New York,

            NY, 10001, U.S.A.)
          *  BlackRock Fund Advisors (with address at 400 Howard Street, San
            Francisco, CA, 94105, U.S.A.)
          *  BlackRock Investment Management (UK) Limited (with address at 12
            Throgmorton Avenue, London, EC2N 2DL, U.K.)
          *  BlackRock Investment Management, LLC (with address at 1 University
            Square Drive, Princeton, NJ, 8540, U.S.A.)
      *  Date on which the threshold was crossed: May 28, 2024
      *  Threshold that is crossed: 3%
      *  Denominator: 34,060,390
      *  Notified details:

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| |Previous
|A) Voting rights|notification After the transaction
+----------------+

                  # of voting
                  rights       # of voting rights           % of voting rights

Not linked Holders Linked to Not linked Linked to to the
of voting rights securities to the securities securities securities BlackRock, Inc. 0 0.00%
BlackRock
Advisors, LLC 1,071,561 3.15%
BlackRock Fund
Advisors 46 0.00%
BlackRock
Investment
Management (UK)
Limited 1,080 0.00%
BlackRock
Investment

 Management, LLC               25,242                       0.07%
 Subtotal                      1,097,929                    3.22%
                  TOTAL        1,097,929  0                 3.22%      0.00%

+--------------+
|B) Equivalent |

|financial     |
|instruments   |After the transaction

+--------------+

                                                  # of voting
                                                  rights that
                                                  may be
                                                  acquired if
 Holders                                          the
 of equivalent    Type of               Exercise  instrument  % of
 financial       financial  Expiration  period or is          voting
 instruments    instrument  date        date      exercised   rights Settlement
 BlackRock      Securities
 Advisors, LLC  Lent                              17,600      0.05%  physical

BlackRock Fund Securities

 Advisors       Lent                              900         0.00%  physical
                TOTAL                             18,500      0.05%
      TOTAL (A & B)   # of voting rights   % of voting rights
                      1,116,429            3.28%
      *  Full chain of controlled undertakings through which the holding is
        effectively held:

BlackRock, Inc.
Trident Merger, LLC
BlackRock Investment Management, 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 Holdco 4, LLC
BlackRock Holdco 6, LLC
BlackRock Delaware Holdings Inc.
BlackRock Fund Advisors
BlackRock, Inc.
BlackRock Holdco 2, Inc.
BlackRock Financial Management, Inc.
BlackRock Capital Holdings, Inc.
BlackRock Advisors, LLC

      *  Additional information: The disclosure obligation arose due to voting
        rights attached to shares for BlackRock, Inc. going above 3%.
        Additionally, total holdings for BlackRock, Inc. went above 3%. The
        disclosure obligation arose due to voting rights attached to shares for

BlackRock Advisors, LLC going above 3%. Additionally, total holdings for BlackRock Advisors, LLC went above 3%.
Together Partnership
On June 3, 2024, Nyxoah received a transparency notification from Together Partnership following the passive crossing below the 10% threshold on May 28, 2024. As of such date, Together Partnership held 2,940,258 shares, representing 8.63% of the total number of voting rights on May 28, 2024 (34,060,390).
The notification dated June 3, 2024 contains the following information:

      *  Reason for the notification: passive crossing of a threshold
      *  Notification by: a person that notifies alone
      *  Persons subject to the notification requirement: Together Partnership
        (with address at Van Putlei 31, 2018 Antwerp, Belgium)
      *  Date on which the threshold was crossed: May 28, 2024
      *  Threshold that is crossed: 10%
      *  Denominator: 34,060,390
      *  Notified details:

+----------------+
| |Previous
|A) Voting rights|notification After the transaction
+----------------+

                  # of voting
                  rights       # of voting rights           % of voting rights

Not linked Holders Linked to Not linked Linked to to the
of voting rights securities to the securities securities securities Together

 Partnership      2,948,285    2,940,258                    8.63%
                  TOTAL        2,940,258  0                 8.63%      0.00%
      *  Full chain of controlled undertakings through which the holding is
        effectively held: Together Partnership is not a controlled entity.

Gilde Healthcare Holding BV and Gilde Healthcare III Management BV
On May 31, 2024, Nyxoah received a transparency notification from Gilde Healthcare Holding BV and Gilde Healthcare III Management BV following the passive crossing below the 10% threshold on May 28, 2024. As of such date, Gilde
Healthcare Holding BV and Gilde Healthcare III Management BV (together with their controlled undertakings) held 2,936,890 shares, representing 8.62% of the total number of voting rights on May 28, 2024 (34,060,390).
The notification dated May 31, 2024 contains the following information:

      *  Reason for the notification: passive crossing of a threshold
      *  Notification by: a parent undertaking or a controlling person
      *  Persons subject to the notification requirement:
          *  Gilde Healthcare Holding BV (with address at Stadsplateau 36, 3521
            AZ Utrecht, the Netherlands)
          *  Gilde Healthcare III Management BV (with address at Stadsplateau
            36, 3521 AZ Utrecht, the Netherlands)
      *  Date on which the threshold was crossed: May 28, 2024
      *  Threshold that is crossed: 10%
      *  Denominator: 34,060,390
      *  Notified details:

+----------------+
| |Previous
|A) Voting rights|notification After the transaction
+----------------+

                  # of voting
                  rights       # of voting rights           % of voting rights

Not linked Holders Linked to Not linked Linked to to the
of voting rights securities to the securities securities securities Gilde Healthcare
Holding BV 0 0 0.00%
Gilde Healthcare
III Management

 BV               3,153,822    2,936,890                    8.62%
 Subtotal         3,153,822    2,936,890                    8.62%
                  TOTAL        2,936,890  0                 8.62%      0.00%
      *  Full chain of controlled undertakings through which the holding is
        effectively held: Gilde Healthcare III Management BV is controlled by
        Gilde Healthcare Holding BV. Gilde Healthcare Holding BV is not a
        controlled entity.
      *  Additional information: Cooperatieve Gilde Healthcare III Sub-Holding
        UA and Cooperatieve Gilde Healthcare III Sub-Holding 2 UA hold the
        shares in Nyxoah. Gilde Healthcare III Management BV is the management
        company of these 2 entities, that in the absence of specific
        instructions can exercise the voting rights at its discretion.
                                       *
                                   *        *

Contact:
Nyxoah
David DeMartino, Chief Strategy Officer
IR@nyxoah.com
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