14 institutions reported holding $1.0M of HORIZON SPACE ACQUISITION II (HSPTR) in SEC 13F filings for 2026-03-31. Largest institutional holders: Harraden Circle Investments, LLC ($149,754), RIVERNORTH CAPITAL MANAGEMENT, LLC ($130,328), HIGHBRIDGE CAPITAL MANAGEMENT LLC ($117,396), Polar Asset Management Partners Inc. ($115,500), BOOTHBAY FUND MANAGEMENT, LLC ($115,498). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | Harraden Circle Investments, LLC | $149,754 | 680,699 | Hold |
| 2 | RIVERNORTH CAPITAL MANAGEMENT, LLC | $130,328 | 592,400 | Hold |
| 3 | HIGHBRIDGE CAPITAL MANAGEMENT LLC | $117,396 | 404,814 | Trimmed |
| 4 | Polar Asset Management Partners Inc. | $115,500 | 525,000 | Hold |
| 5 | BOOTHBAY FUND MANAGEMENT, LLC | $115,498 | 524,990 | Trimmed |
| 6 | AQR Arbitrage LLC | $91,158 | 414,354 | Trimmed |
| 7 | Hudson Bay Capital Management LP | $88,000 | 400,000 | Hold |
| 8 | Shaolin Capital Management LLC | $81,050 | 368,411 | Hold |
| 9 | Clear Street Group Inc. | $74,800 | 340,000 | Added |
| 10 | TORONTO DOMINION BANK | $44,000 | 200,000 | Trimmed |
| 11 | BNP PARIBAS FINANCIAL MARKETS | $27,553 | 125,239 | Hold |
| 12 | BERKLEY W R CORP | $11,846 | 53,846 | Trimmed |
| 13 | WOLVERINE ASSET MANAGEMENT LLC | $1,933 | 8,786 | Trimmed |
| 14 | FNY Investment Advisers, LLC | $0 | 1,200 | New |
Source: SEC Form 13F filings · as of 2026-03-31