24 institutions reported holding $9.2M of HORIZON SPACE ACQUISITION II (HSPT) in SEC 13F filings for 2026-03-31. Largest institutional holders: Clear Street Group Inc. ($1.9M), GLAZER CAPITAL, LLC ($1.7M), D. E. Shaw & Co., Inc. ($1.6M), RIVERNORTH CAPITAL MANAGEMENT, LLC ($1.4M), TWO SIGMA INVESTMENTS, LP ($1.3M). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | Clear Street Group Inc. | $1.9M | 181,878 | Added |
| 2 | GLAZER CAPITAL, LLC | $1.7M | 162,344 | Trimmed |
| 3 | D. E. Shaw & Co., Inc. | $1.6M | 250,000 | Hold |
| 4 | RIVERNORTH CAPITAL MANAGEMENT, LLC | $1.4M | 130,000 | Trimmed |
| 5 | TWO SIGMA INVESTMENTS, LP | $1.3M | 207,299 | Trimmed |
| 6 | L1 Global Manager Pty Ltd | $967,485 | 150,000 | Hold |
| 7 | Westchester Capital Management, LLC | $223,273 | 21,004 | Trimmed |
| 8 | RLH Capital LLC | $52,197 | 4,957 | New |
| 9 | Quarry LP | $52,197 | 4,957 | Hold |
| 10 | UBS Group AG | $5,231 | 811 | Trimmed |
| 11 | MORGAN STANLEY | $477 | 74 | Added |
| 12 | COOPERMAN LEON G | $242 | 1,100 | New |
| 13 | Radcliffe Capital Management, L.P. | $0 | 0 | Exited |
| 14 | WOLVERINE ASSET MANAGEMENT LLC | $0 | 0 | Exited |
| 15 | Polar Asset Management Partners Inc. | $0 | 0 | Exited |
| 16 | GOLDMAN SACHS GROUP INC | $0 | 0 | Exited |
| 17 | MIZUHO SECURITIES USA LLC | $0 | 0 | Exited |
| 18 | METEORA CAPITAL, LLC | $0 | 0 | Exited |
| 19 | BOOTHBAY FUND MANAGEMENT, LLC | $0 | 0 | Exited |
| 20 | BERKLEY W R CORP | $0 | 0 | Exited |
| 21 | AQR Arbitrage LLC | $0 | 0 | Exited |
| 22 | Hudson Bay Capital Management LP | $0 | 0 | Exited |
| 23 | TORONTO DOMINION BANK | $0 | 0 | Exited |
| 24 | HEIGHTS CAPITAL MANAGEMENT, INC | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-03-31