GP-Act III Acquisition-AGPAT
13F holders, Q2 2026 (June 30)24holders −27
2new positions
30sold out
1famous investor
$10.88avg. 13F price*
At the end of Q2 2026, 24 institutions reported holding GP-Act III Acquisition-A (GPAT) in their 13F filings, down 27 from Q1 2026. 2 opened new positions and 30 sold out. The largest holders were Polar Asset Management Partners Inc. ($19.6M), AQR Arbitrage LLC ($15.2M) and MMCAP International Inc. SPC ($13.9M). One famous investor held it Ken Griffin (0.0% of Citadel Advisors's portfolio).
- Company
- GP-Act III Acquisition-A
- CUSIP
- G4035N103
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q1 2026 → Q2 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 2 | $1.8M |
| Exits | 30 | $176.8M |
All 13F filers, Q1 2026 → Q2 2026: 1,871,825 shares bought and 19,581,079 shares sold, net −17,709,254 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 24 holders
| Polar Asset Management Partners Inc. | 0.47% | Add +53.2% | 1,800,000 | $19.6M |
| AQR Arbitrage LLC | 0.26% | Reduce -11.2% | 1,400,000 | $15.2M |
| MMCAP International Inc. SPC | 1.20% | No change | 1,275,000 | $13.9M |
| Alberta Investment Management Corp | 0.07% | Reduce -38.5% | 1,000,000 | $10.9M |
| Mizuho Securities USA LLC | 0.10% | Add +829.3% | 558,486 | $6.0M |
| Berkley W R Corp. | 0.27% | Reduce -41.3% | 497,064 | $5.4M |
| Verition Fund Management LLC | 0.03% | Add +75.3% | 398,885 | $4.3M |
| HGC Investment Management Inc. | 0.87% | Add +0.0% | 399,387 | $4.3M |
| Toronto Dominion Bank | 0.01% | Reduce -45.7% | 345,181 | $3.8M |
| Deutsche Bank AG | 0.00% | No change | 290,000 | $3.1M |
| Picton Mahoney Asset Management | 0.03% | Reduce -81.8% | 250,000 | $2.7M |
| Periscope Capital Inc. | 0.28% | Reduce -40.0% | 150,000 | $1.7M |
| Healthcare of Ontario Pension Plan Trust Fund | 0.00% | New | 149,950 | $1.6M |
| JPMorgan Chase & Co. | 0.00% | Reduce -81.8% | 99,860 | $1.1M |
| Lineage Point Capital LP | 0.15% | Reduce -0.3% | 64,795 | $716K |
| Moore Capital Management, LP | 0.01% | Reduce -75.0% | 50,000 | $544K |
| Kepos Capital LP | 0.66% | No change | 42,500 | $470K |
| Geode Capital Management, LLC | 0.00% | Add +87.5% | 21,362 | $233K |
| Citadel Advisors | 0.00% | Add +16.7% | 20,039 | $218K |
| HRT Financial LP | 0.00% | New | 14,965 | $162K |
| Clear Street Group Inc. | 0.00% | Reduce -10.9% | 9,195 | $100K |
| Longfellow Investment Management Co. LLC | 0.02% | No change | 7,800 | $85K |
| Morgan Stanley | 0.00% | Reduce -64.1% | 23 | $250 |
| UBS Group AG | 0.00% | Reduce -90.3% | 18 | $195 |
"% of holder's portfolio" is GPAT's weight in each manager's 13F, not the share of GP-Act III Acquisition-A the manager owns.