GlobeNewswire Inc | Sep 1, 2021 04:30PM EDT

September 01, 2021

PRESS RELEASE

REGULATED INFORMATION

Publication relating to transparency notifications

Mont-Saint-Guibert(Belgium),September 1,2021,10.30pm CET / 4.30pm ETInaccordancewitharticle14of the Act of 2 May 2007 on the disclosure of large shareholdings, Nyxoah SA (Euronext Brussels/Nasdaq: NYXH) announces that it received two transparency notifications as detailed below.

Robelga SRL / Robert Taub

On August 27, 2021, Nyxoah received a transparency notification from Robelga SRL following the passive downward crossing by Robelga SRL of the 3% threshold on July 7, 2021. As of such date, Robelga SRL held 696,000 shares, representing 2.78% of the total number of voting rights on July 7, 2021 (25,002,609).

The notification dated August 27, 2021 contains the following information:

-- Reason for thenotification: passive crossing of a thresholdNotification by: a parent undertaking or a controlling personPersons subject to the notification requirement: Robelga SRL (with address at Avenue Blcher63, 1180 Uccle), BMI Estate (with address at Avenue Blcher 63, 1180 Uccle) and Robert TaubDate on which the threshold was crossed: July 7, 2021Threshold that is crossed:3%Denominator:25,002,609Notifieddetails:

A) Voting rights Previous After the transaction notification # of voting # of voting rights % of voting rights rightsHolders Linked to Not linked Linked to Not linkedofvotingrights securities tothe securities to the securities securitiesRobert Taub 2,121,470 2,121,470 8.48% BMI Estate 0 0 0.00% Robelga SRL 696,000 696,000 2.78% Subtotal 2,817,470 2,817,470 11.27% TOTAL 2,817,470 0 11.27% 0.00%

-- Chain of controlled undertakings through which the holding is effectively held: Robelga SRL is 100% owned by BMI Estate (a partnership (socit simple) without legal personality). Robert Taub has 100% usufruct and Robert Taubs children have 100% bare ownership of BMI Estate.Additional information:

1.On 23 June 2021, MINV SA (former shareholder) was absorbed (merger by absorption) by Robelga SRL.

2.The participation of Robelga SRL passed below the 3% threshold. The participation of the group Robelga SRL and Robert Taub stays above the 10% threshold.

3.BMI Estate is the new name of Romata (mistakenly referred to as "Ronata" in the previous transparency notification).

Together Partnership

On August 27, 2021, Nyxoah received a transparency notification from Together Partnership following the passive downward crossing of the 10% threshold on July 9, 2021. As of such date, Together held 2,503,500 shares, representing 9.84% of the total number of voting rights on July 9, 2021 (25,437,859).

The notification dated August 27, 2021 contains the following information:

-- Reason for thenotification: passive crossing of a thresholdNotification by: a person notifying alonePerson subject to the notification requirement: Together Partnership (with address at Uitbreidingstraat 10-16, 2600 Berchem)Date on which the threshold was crossed: July 9, 2021Threshold that is crossed:10%Denominator:25,437,859Notifieddetails:

A) Voting rights Previous After the transaction notification # of voting # of voting rights % of voting rights rightsHolders Linked to Not linked Linked to Not linkedofvotingrights securities tothe securities to the securities securitiesTogether 2,503,500 2,503,500 9.84% Partnership TOTAL 2,503,500 9.84%

-- Chain of controlled undertakings through which the holding is effectively held: Together Partnership is not a controlled entity.

*

**

Contact:

NyxoahFabian Suarez, Chief Financial Officerfabian.suarez@nyxoah.com+32 10 22 24 55

Attachment

-- 2021 09 01 PR Transparency notifications 2021 08 (Together Robelga Taub) (ENG)