Who owns GP-Act III Acquisition Corp.?
Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.
Institutional ownership of GPATW from SEC Form 13F filings across 32 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
As of the 2026-06-30 reporting period, 32 institutions disclosed 12.8M shares of GP-Act III Acquisition Corp. worth $2.5M — about 56.2% of shares outstanding; the largest disclosed holder is Harraden Circle Investments, LLC. Source: SEC Form 13F filings, parsed by EvidInvest.
32
13F holders
$2.5M
value, 2026 filers
56.2%
of shares outstanding (12.8M sh)
2
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30 · % of fund = share of the manager's own book · % of co. = share of GPATW's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | Harraden Circle Investments, LLC | 1.5M | $288,940 | 0.0% | 6.7% | 0.0% |
| 2 | Polar Asset Management Partners Inc. | 1.2M | $235,125 | 0.0% | 5.4% | 0.0% |
| 3 | MMCAP International Inc. SPC | 1.0M | $197,125 | 0.0% | 4.5% | 0.0% |
| 4 | PICTON MAHONEY ASSET MANAGEMENT | 937,500 | $207,188 | 0.0% | 4.1% | 0.0% |
| 5 | HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND | 937,500 | $207,188 | 0.0% | 4.1% | 0.0% |
| 6 | Alberta Investment Management Corp | 812,500 | $154,375 | 0.0% | 3.6% | 0.0% |
| 7 | Wealthspring Capital LLC | 759,264 | $144,260 | 0.0% | 3.3% | -0.6% |
| 8 | LMR Partners LLP | 612,500 | $116,375 | 0.0% | 2.7% | 0.0% |
| 9 | Lineage Point Capital LP | 575,477 | $109,341 | 0.0% | 2.5% | +13.5% |
| 10 | TORONTO DOMINION BANK | 481,824 | $91,547 | 0.0% | 2.1% | +1.1% |
| 11 | AQR Arbitrage LLC | 458,963 | $87,203 | 0.0% | 2% | +0.3% |
| 12 | CSS LLC/IL | 441,672 | $83,918 | 0.0% | 1.9% | 0.0% |
| 13 | Linden Advisors LP | 360,400 | $86,496 | 0.0% | 1.6% | 0.0% |
| 14 | Shaolin Capital Management LLC | 294,650 | $55,984 | 0.0% | 1.3% | -41.0% |
| 15 | Lepercq De Neuflize Asset Management LLC | 250,000 | $47,500 | 0.0% | 1.1% | +66.7% |
| 16 | ARISTEIA CAPITAL, L.L.C. | 245,375 | $58,890 | 0.0% | 1.1% | 0.0% |
| 17 | RIVERNORTH CAPITAL MANAGEMENT, LLC | 225,599 | $43,856 | 0.0% | 1% | 0.0% |
| 18 | Verition Fund Management LLC | 225,400 | $42,826 | 0.0% | 1% | 0.0% |
| 19 | GRITSTONE ASSET MANAGEMENT LLC | 217,248 | $41,277 | 0.0% | 1% | 0.0% |
| 20 | Periscope Capital Inc. | 210,700 | $42,140 | 0.0% | 0.9% | 0.0% |
| 21 | Meteora Capital, LLC | 200,000 | $38,000 | 0.0% | 0.9% | -16.0% |
| 22 | Clear Street Group Inc. | 198,794 | $37,771 | 0.0% | 0.9% | 0.0% |
| 23 | Saba Capital Management, L.P. | 193,229 | $46,375 | 0.0% | 0.8% | 0.0% |
| 24 | L1 Global Manager Pty LtdNEW | 110,325 | $20,962 | 0.0% | 0.5% | new |
| 25 | MOORE CAPITAL MANAGEMENT, LP | 100,000 | $19,000 | 0.0% | 0.4% | 0.0% |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.