Nyxoah SA: which funds bought and sold

Institutions that bought and sold Nyxoah SA shares in Q2 2026, from the holdings they reported to the SEC on Form 13F for March 31, 2026 and June 30, 2026.

Between March 31, 2026 and June 30, 2026, 24 institutions that filed 13F reports for both quarters added to or opened positions in Nyxoah SA, and 11 cut or closed them. Together they added a net 16.7M shares, +464.1% on what they held at the start of the quarter. Active managers and hedge funds on our list were net buyers of 1.4M shares (+146.3%); index fund managers were net sellers of 364K shares (−68.7%). 18 opened a new position and 8 sold out entirely.

Bought, Q2 2026 24 institutions, 18 of them new holders Sold, Q2 2026 11 institutions, 8 of them sold out

Net change, all compared +16.7M shares (+464.1%)

Net change, active managers +1.4M shares (+146.3%), 4 bought, 3 sold

Buyers versus sellers

institutions compared, 51

24 bought 16 11 sold

Active managers and hedge funds 4 bought · 3 sold · +1.4M

Index fund managers 1 bought · 1 sold · −364K

Other institutions 19 bought · 7 sold · +15.7M

Biggest buyers

by change in shares held

Biggest buyers
Institution	Change in shares	Shares June 30, 2026	Value
Aigh Capital Management LLC	+14.5M New position	14.5M	$24.6M
Hudson Bay Capital Management LP Hedge fund	+718K New position	718K	$1.2M
Pentwater Capital Management LP Hedge fund	+600K New position	600K	$1M
Heights Capital Management, Inc	+520K +168.7%	829K	$1.4M
BNP Paribas Asset Management Holding S.A.	+208K +27.6%	963K	$1.7M
Readystate Asset Management LP	+207K New position	207K	$350,626
Integrated Wealth Concepts LLC	+100K New position	100K	$169,000
Citadel Advisors LLC Hedge fund	+80K New position	80K	$135,530
Jane Street Group, LLC	+44K New position	44K	$75,208
UBS Group AG	+36K New position	36K	$60,247
Renaissance Technologies LLC Hedge fund	+33K New position	33K	$56,581
Ifp Advisors, Inc	+31K +35.6%	118K	$200,140
Alphacore Capital LLC	+30K New position	30K	$51,217
Elk River Wealth Management LLC	+30K New position	30K	$51,217
Geode Capital Management, LLC Index funds	+24K +111.5%	45K	$75,715
Old Mission Capital LLC	+19K New position	19K	$32,640
J.W. Cole Advisors, Inc.	+13K New position	13K	$22,731
Credit Agricole S A	+12K New position	12K	$19,489
Scientech Research LLC	+11K New position	11K	$18,301
Xtx Topco Ltd	+3,289 +11.6%	32K	$53,473

Biggest buyers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Hudson Bay Capital Management LP Hedge fund	+718K New position	718K	$1.2M
Pentwater Capital Management LP Hedge fund	+600K New position	600K	$1M
Citadel Advisors LLC Hedge fund	+80K New position	80K	$135,530
Renaissance Technologies LLC Hedge fund	+33K New position	33K	$56,581

Biggest sellers

by change in shares held

Biggest sellers
Institution	Change in shares	Shares June 30, 2026	Value
Blackrock, Inc. Index funds	−388K −76.2%	121K	$204,840
Sio Capital Management, LLC	−51K Sold out	0	—
Millennium Management LLC Hedge fund	−31K Sold out	0	—
Vestal Point Capital, LP Hedge fund	−25K −2.9%	843K	$1.4M
Walleye Capital LLC Hedge fund	−17K Sold out	0	—
Bank Of America Corp	−15K Sold out	0	—
Box Hill Private Wealth LLC	−15K Sold out	0	—
Barclays PLC	−11K Sold out	0	—
Commonwealth Equity Services, LLC	−10K Sold out	0	—
Fourth Dimension Wealth, LLC	−390 −49.4%	400	$676
Jpmorgan Chase & Co	−246 Sold out	0	—

Biggest sellers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Millennium Management LLC Hedge fund	−31K Sold out	0	—
Vestal Point Capital, LP Hedge fund	−25K −2.9%	843K	$1.4M
Walleye Capital LLC Hedge fund	−17K Sold out	0	—

New positions

largest by value

Institution	Shares	Value June 30, 2026
Aigh Capital Management LLC	14.5M	$24.6M
Hudson Bay Capital Management LPHedge fund	718K	$1.2M
Pentwater Capital Management LPHedge fund	600K	$1M
Readystate Asset Management LP	207K	$350,626
Integrated Wealth Concepts LLC	100K	$169,000
Citadel Advisors LLCHedge fund	80K	$135,530
Jane Street Group, LLC	44K	$75,208
UBS Group AG	36K	$60,247
Renaissance Technologies LLCHedge fund	33K	$56,581
Alphacore Capital LLC	30K	$51,217

Sold out

largest by value

Institution	Shares	Value March 31, 2026
Sio Capital Management, LLC	51K	$148,450
Millennium Management LLCHedge fund	31K	$90,029
Walleye Capital LLCHedge fund	17K	$50,504
Bank Of America Corp	15K	$45,032
Box Hill Private Wealth LLC	15K	$44,425
Barclays PLC	11K	$32,678
Commonwealth Equity Services, LLC	10K	$30,050
Jpmorgan Chase & Co	246	$686

Who holds the shares

13F holdings at June 30, 2026

Institutions reporting: 45
Ten largest holders: 95.1%
Index fund managers: 0.8%
Active managers and hedge funds: 10.3%

Buying and selling by type of institution, March 31, 2026 to June 30, 2026
Type	Bought	Sold	New	Sold out	Net change in shares	Net %
Active managers and hedge funds	4	3	4	2	+1.4M	+146.3%
Index fund managers	1	1	0	0	−364K	−68.7%
Other institutions	19	7	14	6	+15.7M	+734.0%

Active managers and hedge funds: a list we maintain of about 400 well-known stock-picking firms and hedge funds, matched by SEC registration number (CIK) and checked against the filer names each quarter. Index fund managers: the large index houses, such as BlackRock, Vanguard, State Street, Geode and Northern Trust. Every other filer (banks, brokers, wealth managers, pension funds, insurers and firms not on the list) counts as another institution. A firm that files under several SEC registrations appears once for each.

What these filings can and cannot tell you

Form 13F lists the long positions in US-listed shares held by investment managers with more than $100 million in such holdings. Managers file it up to 45 days after each quarter ends, so this page shows what funds held at the end of each quarter, not what they are doing now: a position may have changed since. Short positions, most derivatives and smaller managers are not included, and a cut can mean a fund lost clients or rebalanced rather than a view on Nyxoah SA.

Only managers that filed a holdings report for both quarters are compared (51 here). 3 other holders are left out: first-time or late filers, firms that changed their SEC registration, and filings that withheld positions under confidential treatment, any of which would otherwise look like a new position or a sale. Figures are as reported by each manager in the SEC's quarterly 13F data sets; option positions are excluded.

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