Nyxoah SA

Declaration of Voting Results & Voting Rights Announcements • Mar 31, 2023

REGULATED INFORMATION

Information on the Total Number of Voting Rights and Shares

Mont-Saint-Guibert (Belgium), March 31, 2023, 10:30 pm CET / 4:30 pm ET – In accordance with article 15 of the Law of 2 May 2007 on the disclosure of large shareholdings, Nyxoah SA (Euronext Brussels and Nasdaq: NYXH) publishes the below information following the issue of new shares.

• Share capital: EUR 4,859,382.45
• Total number of securities carrying voting rights: 28,286,985 (all ordinary shares)
• Total number of voting rights (= denominator): 28,286,985 (all relating to ordinary shares)
• Number of rights to subscribe to securities carrying voting rights not yet issued:
  • o 55 "2016 ESOP Warrants" issued on November 3, 2016, entitling their holders to subscribe to a total number of 27,500 securities carrying voting rights (all ordinary shares);
  • o 100 "2018 ESOP Warrants" issued on December 12, 2018, entitling their holders to subscribe to a total number of 50,000 securities carrying voting rights (all ordinary shares);
  • o 430,500 "2020 ESOP Warrants" issued on February 21, 2020, entitling their holders to subscribe to a total number of 430,500 securities carrying voting rights (all ordinary shares); and
  • o 1,326,375 "2021 ESOP Warrants" issued on September 8, 2021, entitling their holders to subscribe to a total number of 1,326,375 securities carrying voting rights (all ordinary shares); and
  • o 700,000 "2022 ESOP Warrants" issued on December 28, 2022, entitling their holders to subscribe to a total number of 700,000 securities carrying voting rights (all ordinary shares).

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Contacts: Nyxoah David DeMartino, Chief Strategy Officer david.demartino@nyxoah.com +1 310 310 1313