ACGC: ACP Holdings 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 | New 13G stake | Polar Asset Management Partners Inc. | 7.30% | SEC | |
| 2026-08-13 | New 13G stake | MAGNETAR FINANCIAL LLC | 7.29% | SEC | |
| 2026-08-12 | New 13G stake | Adage Capital Management, L.P. | 8.20% | SEC |
Institutional ownership (Q2 2026)
43 institutions reported holding $162.32M of ACP Holdings Acquisition Corp. on Form 13F (0 the quarter before). 43 opened a new position and 0 sold out. Shares held by institutions: new.
| Largest holders | Shares | Value |
|---|---|---|
| ADAGE CAPITAL PARTNERS GP, L.L.C. | 1,800,000 | $17.89M |
| Polar Asset Management Partners Inc. | 1,605,150 | $15.96M |
| Magnetar Financial LLC | 1,600,000 | $15.90M |
| Karpus Management, Inc. | 1,348,625 | $13.41M |
| Alberta Investment Management Corp | 980,000 | $9.74M |
| WOLVERINE ASSET MANAGEMENT LLC | 907,002 | $9.02M |
| Meteora Capital, LLC | 730,027 | $7.26M |
| AQR Arbitrage LLC | 584,442 | $5.81M |
| Paloma Partners Management Co | 578,500 | $5.75M |
| Linden Advisors LP | 500,000 | $4.97M |
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