REGULATED INFORMATION

Publication relating to transparency notifications

Mont-Saint-Guibert (Belgium), September 5, 2025, 10:30 pm CET / 4:30 pm 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 a transparency notification as detailed below.

On September 4, 2025, Nyxoah received a transparency notification from Cochlear Limited and Cochlear Investments Pty Ltd following a passive crossing of a threshold. Based on the notification, Cochlear Investments Pty Ltd holds 5,631,319 voting rights, representing 14.999% of the total number of voting rights on August 29, 2025 (37,544,782).

The notification dated September 4, 2025 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:
  • Cochlear Limited (with address at 1 University Avenue, Macquarie University, NSW 2109, Australia)
  • Cochlear Investments Pty Ltd (with address at 1 University Avenue, Macquarie University, NSW 2109, Australia)
• Date on which the threshold was crossed: August 29, 2025
• Threshold that is crossed: 15%
• Denominator: 37,544,782
• Notified details:
  
  

• Full chain of controlled undertakings through which the holding is effectively held: Cochlear Investments Pty Ltd is a wholly owned subsidiary of Cochlear Limited, which is listed on the Australian Securities Exchange and has no controlling shareholder.
• Additional information: This notification concerns a downward crossing of the 15% threshold following a passive decrease, whereby Cochlear Investments Pty Ltd’s holding in Nyxoah fell from 15.04% to 14.999% of the voting rights.

*

* *

Contact:
Nyxoah
John Landry, CFO
IR@nyxoah.com

Attachment

• 2025 09 05 PR Transparency notifications 2025 09 (Cochlear) (ENG)