Information  on  the  total  number  of  voting rights  and  shares.

Information on the total number of voting rights and shares

Mont-Saint-Guibert (Belgium), November 20, 2025, 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 6.504.688,76
• Total number of securities carrying voting rights: 43,026,460 (all ordinary shares)
• Total number of voting rights (= denominator): 43,026,460 (all relating to ordinary shares)
• Number of rights to subscribe to securities carrying voting rights not yet issued: 3,258,819 (all granted subscription rights; this number excludes 692,677 subscription rights that were issued but not yet granted)