Who Owns GP-ACT III ACQUISITION CORP (GPATW)? -- Institutional Holders (2026-06-30)
34 institutions reported holding $2.5M of GP-ACT III ACQUISITION CORP (GPATW) in SEC 13F filings for 2026-06-30. Largest institutional holders: Harraden Circle Investments, LLC ($288,940), Polar Asset Management Partners Inc. ($235,125), PICTON MAHONEY ASSET MANAGEMENT ($207,188), HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND ($207,188), MMCAP International Inc. SPC ($197,125). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|
| 1 | Harraden Circle Investments, LLC | $288,940 | 1.5M | Hold |
| 2 | Polar Asset Management Partners Inc. | $235,125 | 1.2M | Hold |
| 3 | PICTON MAHONEY ASSET MANAGEMENT | $207,188 | 937,500 | Hold |
| 4 | HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND | $207,188 | 937,500 | Hold |
| 5 | MMCAP International Inc. SPC | $197,125 | 1.0M | Hold |
| 6 | Alberta Investment Management Corp | $154,375 | 812,500 | Hold |
| 7 | Wealthspring Capital LLC | $144,260 | 759,264 | Trimmed |
| 8 | LMR Partners LLP | $116,375 | 612,500 | Hold |
| 9 | Lineage Point Capital LP | $109,341 | 575,477 | Added |
| 10 | TORONTO DOMINION BANK | $91,547 | 481,824 | Added |
| 11 | AQR Arbitrage LLC | $87,203 | 458,963 | Added |
| 12 | Linden Advisors LP | $86,496 | 360,400 | Hold |
| 13 | CSS LLC/IL | $83,918 | 441,672 | Hold |
| 14 | ARISTEIA CAPITAL, L.L.C. | $58,890 | 245,375 | Hold |
| 15 | Shaolin Capital Management LLC | $55,984 | 294,650 | Trimmed |
| 16 | Lepercq De Neuflize Asset Management LLC | $47,500 | 250,000 | Added |
| 17 | Saba Capital Management, L.P. | $46,375 | 193,229 | Hold |
| 18 | RIVERNORTH CAPITAL MANAGEMENT, LLC | $43,856 | 225,599 | Hold |
| 19 | Verition Fund Management LLC | $42,826 | 225,400 | Hold |
| 20 | Periscope Capital Inc. | $42,140 | 210,700 | Hold |
| 21 | GRITSTONE ASSET MANAGEMENT LLC | $41,277 | 217,248 | Hold |
| 22 | METEORA CAPITAL, LLC | $38,000 | 200,000 | Trimmed |
| 23 | Clear Street Group Inc. | $37,771 | 198,794 | Hold |
| 24 | L1 Global Manager Pty Ltd | $20,962 | 110,325 | New |
| 25 | MOORE CAPITAL MANAGEMENT, LP | $19,000 | 100,000 | Hold |
Source: SEC Form 13F filings · as of 2026-06-30