GP-Act III Acquisition Corp.
Ownership
Ownership Structure
Who owns GP-Act III Acquisition Corp. (GPAT)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 27.8% of the shares are freely tradable; institutional investors hold 66.6%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Karpus Management Inc | 13.80 | 2,230,216 | -4.4 | 03/31/2026 |
| First Trust Capital Management L.P. | 12.94 | 2,091,077 | +0.0 | 03/31/2026 |
| Cnh Partners, LLC | 9.76 | 1,576,803 | +0.0 | 03/31/2026 |
| Picton Mahoney Asset Management | 8.51 | 1,375,000 | -26.7 | 03/31/2026 |
| Mmcap International Inc. Spc | 7.89 | 1,275,000 | +0.0 | 03/31/2026 |
| LMR Partners LLP | 7.58 | 1,225,000 | +0.0 | 03/31/2026 |
| Polar Asset Management Partners | 7.27 | 1,174,996 | +0.0 | 03/31/2026 |
| Alberta Investment Management Corp | 6.19 | 1,000,000 | -38.5 | 06/30/2026 |
| Westchester Capital Management LLC | 5.33 | 860,852 | -36.7 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| PICTON Arbitrage Plus Alternative Fund F | 7.04 | 1,137,000 | -26.7 | 03/31/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Data as of: September 28, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.