Publication relating to transparency notifications

Rhea-AI Summary

Nyxoah SA (Euronext Brussels/Nasdaq: NYXH) announced receiving a transparency notification from Cochlear Limited and Cochlear Investments Pty Ltd following a passive threshold crossing. The notification reveals that Cochlear Investments Pty Ltd now holds 5,631,319 voting rights, representing 14.999% of total voting rights (37,544,782) as of August 29, 2025.

The change represents a passive downward crossing of the 15% threshold, with Cochlear Investments Pty Ltd's holding decreasing from 15.04% to 14.999%. Cochlear Investments Pty Ltd is a wholly owned subsidiary of Cochlear Limited, an Australian Securities Exchange-listed company with no controlling shareholder.

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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:
  
  

A) Voting rights	Previous notification	After the transaction
	# of voting rights	# of voting rights		% of voting rights
Holders of voting rights		Linked to securities	Not linked to the securities	Linked to securities	Not linked to the securities
Cochlear Limited	0	0	0	0.00%	0.00%
Cochlear Investments Pty Ltd	3,947,617	5,631,319	0	15.00%	0.00%
Subtotal	3,947,617	5,631,319		15.00%
	TOTAL	5,631,319	0	15.00%	0.00%

• 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.

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

Attachment

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

FAQ

What percentage of Nyxoah (NYXH) voting rights does Cochlear Investments Pty Ltd now hold?

As of August 29, 2025, Cochlear Investments Pty Ltd holds 5,631,319 voting rights, representing 14.999% of Nyxoah's total voting rights.

Why did Cochlear Investments Pty Ltd cross the 15% threshold in Nyxoah stock?

The threshold crossing was passive, resulting in a decrease from 15.04% to 14.999% of voting rights, falling just below the 15% threshold.

What is the total number of voting rights in Nyxoah (NYXH) as of August 2025?

The total number of voting rights in Nyxoah (denominator) is 37,544,782 as of August 29, 2025.

Who owns Cochlear Investments Pty Ltd, the major shareholder in Nyxoah?

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.