Publication relating to transparency notifications

Rhea-AI Summary

Nyxoah (NASDAQ/EBR: NYXH) disclosed a transparency notification dated March 19, 2026 after Robelga SRL crossed the 3% threshold on December 30, 2025. The combined holding of Robert Taub and related undertakings equals 4,360,800 voting rights (10.14%) of 43,026,460 total voting rights.

The notification lists 4,310,800 voting rights linked to securities and 50,000 equivalent instruments (warrants expiring 08/06/2027 and 14/06/2028). Ownership chain: Robelga SRL 100% owned by BMI Estate; usufruct by Robert Taub; bare ownership by his children.

Positive

• Combined holding of 10.14% of voting rights as of December 30, 2025
• 4,360,800 total voting rights including 50,000 warrants

Negative

• Concentrated ownership: single group controls >10% of voting rights
• Notification crossing 3% threshold may trigger greater disclosure scrutiny

Key Figures

Total voting rights held: 4,360,800 voting rights Ownership percentage: 10.14% of voting rights Denominator: 43,026,460 voting rights +5 more

8 metrics

Total voting rights held 4,360,800 voting rights Robert Taub group position as of December 30, 2025

Ownership percentage 10.14% of voting rights Robert Taub group stake on December 30, 2025

Denominator 43,026,460 voting rights Total voting rights used in transparency notification

Linked voting rights 4,310,800 voting rights Voting rights linked to securities held by Robert Taub group

Equivalent instruments 50,000 equivalent financial instruments Warrants counted as voting-rights equivalents

Threshold crossed 3% threshold Robelga SRL crossing notification trigger on December 30, 2025

Warrants 2027 25,000 warrants Robert Taub warrants expiring 08/06/2027 (0.06% voting rights)

Warrants 2028 25,000 warrants Robert Taub warrants expiring 14/06/2028 (0.06% voting rights)

Market Reality Check

Price: $3.08 Vol: Volume 160,797 is about 2...

high vol

$3.08 Last Close

Volume Volume 160,797 is about 2.7x the 20-day average of 59,639, indicating elevated trading interest before this disclosure. high

Technical Shares trade below the 200-day MA of 5.64 at a pre-news price of 3.08, near the 52-week low of 3.05 and well below the 11.87 52-week high.

Peers on Argus

NYXH was up 0.98% while several peers like AVR (-4.92%), INFU (-3.87%), KRMD (-2...

NYXH was up 0.98% while several peers like AVR (-4.92%), INFU (-3.87%), KRMD (-2.09%) and STSS (-2.75%) were down; OSUR rose 1.37%, pointing to stock-specific dynamics rather than a broad sector move.

Historical Context

5 past events · Latest: Mar 11 (Neutral)

Pattern 5 events

Date	Event	Sentiment	Move	Catalyst
Mar 11	Conference participation	Neutral	-3.9%	Announcement of participation in Oppenheimer MedTech & Services conference.
Mar 05	Earnings timing update	Neutral	+0.5%	Notice of date and webcast details for Q4 and full-year 2025 results.
Feb 27	Transparency notification	Neutral	-1.5%	Disclosure of 4,360,800 voting rights (9.99%) held by Robert Taub group.
Feb 25	Capital structure update	Neutral	+5.6%	Updated share capital and total voting rights following new share issuance.
Feb 18	Commercial partnership MoU	Positive	-4.5%	MoU with Sheikh Shakhbout Medical City to expand Genio access in Middle East.

Pattern Detected

Recent news, including governance and commercial updates, often showed price moves diverging from the neutral-to-positive tone of announcements.

Recent Company History

Over the past months, Nyxoah issued several corporate and governance updates. A February notice on voting rights and capital structure highlighted 43,662,403 shares and various subscription rights and convertible bonds. Multiple transparency notifications detailed Robert Taub’s group holding of 4,360,800 voting rights around the 10% level. Commercially, the company signed a Memorandum of Understanding to expand Genio access in the Middle East and announced participation in investor conferences and an earnings date, showing active engagement with both markets and clinical partners.

Market Pulse Summary

This announcement formalizes a transparency notification under Belgian disclosure rules, confirming ...

Analysis

This announcement formalizes a transparency notification under Belgian disclosure rules, confirming that Robert Taub’s group held 4,360,800 voting rights, or 10.14% of the 43,026,460 total as of December 30, 2025, including 50,000 warrants. It follows earlier updates on capital structure and voting rights. Investors may watch future filings for further changes in significant shareholdings, alongside ongoing commercial progress and financing developments highlighted in recent regulatory reports.

Key Terms

transparency notification, voting rights, equivalent financial instruments, warrants, +2 more

6 terms

transparency notification regulatory

"Nyxoah SA ... announces that it received a transparency notification as detailed below."

A transparency notification is a public alert required by market rules when a shareholder’s stake in a listed company rises above or falls below specified levels of ownership. It tells investors who is gaining or losing influence — like seeing someone start to buy or sell large slices of a cake — and matters because such moves can signal changes in control, voting power, potential alliances or takeover interest, which can affect share value and investor decisions.

voting rights regulatory

"held 4,360,800 voting rights, consisting of 4,310,800 voting rights linked to securities"

Voting rights are the ability of shareholders to have a say in important company decisions, like choosing leaders or approving big changes. They matter because they give owners a voice in how the company is run, similar to how voters influence elections, ensuring the company acts in shareholders’ interests.

equivalent financial instruments financial

"50,000 equivalent financial instruments, representing 10.14% of the total number"

Financial assets or contracts that provide the same or very similar economic exposure, risks, and returns as one another, such as two ways to gain the same market exposure through different products. For investors this matters because choosing between equivalents is often about cost, convenience, tax treatment or counterparty risk—like picking between two routes that get you to the same destination but differ in tolls, travel time and safety. Recognizing equivalents helps compare options and manage portfolio risk efficiently.

warrants financial

"Robert Taub | Warrants | 08/06/2027 | | 25,000 | 0.06% | cash"

Warrants are special documents that give you the right to buy a company's stock at a set price before a certain date. They are often used as a way for companies to attract investors or raise money, and their value can increase if the company's stock price goes up.

usufruct regulatory

"Robert Taub has 100% usufruct and Robert Taub’s children have 100% bare ownership"

Usufruct is a legal right that lets one party use and collect income from someone else’s asset—like collecting rent, crops or dividends—without owning it, while the underlying property remains with the owner. It matters to investors because it changes who gets cash flow, who can make decisions about the asset, and how the asset is valued or transferred; think of it as a long-term rental with the duty to keep the property intact.

bare ownership regulatory

"Robert Taub has 100% usufruct and Robert Taub’s children have 100% bare ownership"

Bare ownership is the legal right to own an asset while someone else has the right to use it and collect any income from it for a period of time. Think of it like owning a house on paper while another person lives there and receives rent; you hold the title but not the practical benefits until their use ends. For investors, bare ownership affects current value, control, taxes, and future cash flow timing because the asset’s full economic benefit is delayed.

AI-generated analysis. Not financial advice.

REGULATED INFORMATION

Publication relating to transparency notifications

Mont-Saint-Guibert (Belgium), March 20, 2026, 10:30 pm CET / 5:30 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.

Robert Taub / Robelga SRL

On March 19, 2026, Nyxoah received a transparency notification from Robert Taub and related person Robelga SRL, following the crossing above the 3% threshold by Robelga SRL on December 30, 2025 (while the overall “group” participation did not change). Based on the notification, Robert Taub (together with his controlled undertakings) held 4,360,800 voting rights, consisting of 4,310,800 voting rights linked to securities and 50,000 equivalent financial instruments, representing 10.14% of the total number of voting rights on December 30, 2025 (43,026,460).

The notification dated March 19, 2026 contains the following information:

• Reason for the notification: acquisition or disposal of voting securities or voting rights
• Notification by: a parent undertaking or a controlling person
• Persons subject to the notification requirement:
  • Robert Taub
  • Robelga SRL (with address at Avenue des Croix de Guerre 149 / 13, 1120 Brussels)
• Date on which the threshold was crossed: December 30, 2025
• Threshold that is crossed: 3%
• Denominator: 43,026,460
• 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
Robert Taub	2,712,510	2,712,510	0	6.30%	0.00%
BMI Estate	567,484	0	0	0.00%	0.00%
Robelga SRL	1,030,806	1,598,290	0	3.71%	0.00%
Subtotal	4,310,800	4,310,800		10.02%
	TOTAL	4,310,800	0	10.02%	0.00%

B) Equivalent financial instruments	After the transaction
Holders of equivalent financial instruments	Type of financial instrument	Expiration date	Exercise period or date	# of voting rights that may be acquired if the instrument is exercised	% of voting rights	Settlement
Robert Taub	Warrants	08/06/2027		25,000	0.06%	cash
Robert Taub	Warrants	14/06/2028		25,000	0.06%	cash
	TOTAL			50,000	0.12%

	TOTAL (A & B)			# of voting rights	% of voting rights
				4,360,800	10.14%

• Full chain of controlled undertakings through which the holding is effectively held: Robelga SRL is 100% owned by BMI Estate (a partnership (société simple) without legal personality). Robert Taub has 100% usufruct and Robert Taub’s children have 100% bare ownership of BMI Estate.
• Additional information: This notification was due because Robelga SRL moved above the 3% threshold.

*

* *

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

Attachment

• 2026 03 20 PR Transparency notification (Robert Taub) (ENG)

FAQ

What stake did Robert Taub report in Nyxoah (NYXH) on March 19, 2026?

He reported a 10.14% interest in Nyxoah voting rights. According to the company, the group held 4,360,800 voting rights out of 43,026,460, including 50,000 equivalent financial instruments (warrants).

When did Robelga SRL cross the 3% threshold for Nyxoah (NYXH)?

Robelga SRL crossed the 3% threshold on December 30, 2025. According to the company, that movement triggered the transparency notification filed on March 19, 2026.

How are Robert Taub’s Nyxoah (NYXH) holdings structured legally?

Holdings are held through Robelga SRL and BMI Estate with usufruct and bare ownership. According to the company, Robelga SRL is 100% owned by BMI Estate; Taub has usufruct and his children bare ownership.

What types of instruments contributed to the 10.14% Nyxoah (NYXH) stake?

The stake includes securities and warrants totaling 50,000 equivalent instruments. According to the company, warrants expire 08/06/2027 and 14/06/2028 and are cash-settled.

Does the transparency notification change Nyxoah (NYXH) total voting rights?

No, it reports ownership proportions without altering the denominator. According to the company, the denominator remains 43,026,460 total voting rights used to calculate percentages.