24 institutions reported holding $5.8M of HORIZON QUANTUM HOLDINGS LTD (HQWWW) in SEC 13F filings for 2026-06-30. Largest institutional holders: Alberta Investment Management Corp ($1.0M), Q Global Advisors, LLC ($960,000), Centiva Capital, LP ($938,304), Hudson Bay Capital Management LP ($914,652), LMR Partners LLP ($593,952). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | Alberta Investment Management Corp | $1.0M | 62,500 | Hold |
| 2 | Q Global Advisors, LLC | $960,000 | 60,000 | Trimmed |
| 3 | Centiva Capital, LP | $938,304 | 58,791 | New |
| 4 | Hudson Bay Capital Management LP | $914,652 | 57,309 | Added |
| 5 | LMR Partners LLP | $593,952 | 37,122 | Trimmed |
| 6 | Greenland Capital Management LP | $361,430 | 22,646 | New |
| 7 | HRT FINANCIAL LP | $296,000 | 18,578 | New |
| 8 | MILLENNIUM MANAGEMENT LLC | $280,000 | 17,500 | Hold |
| 9 | ARISTEIA CAPITAL, L.L.C. | $217,884 | 14,057 | Trimmed |
| 10 | Saba Capital Management, L.P. | $173,600 | 11,200 | Trimmed |
| 11 | Caption Management, LLC | $47,952 | 2,997 | Hold |
| 12 | UBS Group AG | $8,032 | 502 | Added |
| 13 | AQR Arbitrage LLC | $0 | 0 | Exited |
| 14 | WOLVERINE ASSET MANAGEMENT LLC | $0 | 0 | Exited |
| 15 | Polar Asset Management Partners Inc. | $0 | 0 | Exited |
| 16 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | $0 | 0 | Exited |
| 17 | Verition Fund Management LLC | $0 | 0 | Exited |
| 18 | Walleye Capital LLC | $0 | 0 | Exited |
| 19 | Shaolin Capital Management LLC | $0 | 0 | Exited |
| 20 | Wealthspring Capital LLC | $0 | 0 | Exited |
| 21 | Lineage Point Capital LP | $0 | 0 | Exited |
| 22 | Clear Street Group Inc. | $0 | 0 | Exited |
| 23 | CSS LLC/IL | $0 | 0 | Exited |
| 24 | Linden Advisors LP | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-06-30