GPAT: GP-Act III Acquisition Corp. insider trading, 5% holders and institutional ownership
From public SEC filings: open-market insider purchases and sales (Form 4, last 180 days), holders of 5% or more (Schedules 13D and 13G) and institutional ownership (Form 13F). Insider and 5% data delayed 48 hours.
Insider trading
0 open-market buys totaling - and 0 sales totaling - in the last 180 days.
Activist and 5% holders
| Filed | What | Holder | Stake | Change | Filing |
|---|---|---|---|---|---|
| 2026-08-14 | Fell below 5% | First Trust Merger Arbitrage Fund | 0.00% | SEC | |
| 2026-08-14 | 13G amendment | AQR Capital Management, LLC | 8.66% | SEC |
Institutional ownership (Q2 2026)
24 institutions reported holding $96.23M of GP-Act III Acquisition Corp. on Form 13F (52 the quarter before). 2 opened a new position and 30 sold out. Shares held by institutions: -66%.
| Largest holders | Shares | Value |
|---|---|---|
| Polar Asset Management Partners Inc. | 1,800,000 | $19.57M |
| AQR Arbitrage LLC | 1,400,000 | $15.25M |
| MMCAP International Inc. SPC | 1,275,000 | $13.86M |
| Alberta Investment Management Corp | 1,000,000 | $10.89M |
| MIZUHO SECURITIES USA LLC | 618,584 | $6.68M |
| BERKLEY W R CORP | 497,064 | $5.41M |
| Verition Fund Management LLC | 398,885 | $4.34M |
| HGC Investment Management Inc. | 399,387 | $4.34M |
| TORONTO DOMINION BANK | 345,181 | $3.75M |
| DEUTSCHE BANK AG\ | 290,000 | $3.15M |
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