Who owns GP-Act III Acquisition Corp., from the filings themselves: stakes over 5% (Schedule 13D/G), the institutional managers reporting the stock each quarter (13F), and the funds holding it (N-PORT).
Investors crossing 5% ownership must disclose it. Schedule 13G filers certify the stake is passive; Schedule 13D is the general form for everyone else — founders, strategic holders, and activists alike. Each entry is the holder's most recent disclosure. Coverage begins with SEC's structured filings from December 18, 2024; a holder appears once they file or amend after that date.
First Trust Merger Arbitrage Fund: 0.0% · 0 shares — First Trust Capital Management L.P.: 0.0% · 0 shares — First Trust Capital Solutions L.P.: 0.0% · 0 shares
AQR Capital Management, LLC: 8.7% · 1,400,000 shares — AQR Capital Management Holdings, LLC: 8.7% · 1,400,000 shares — AQR Arbitrage, LLC: 8.7% · 1,400,000 shares
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See every investor who has disclosed crossing 5% of GP-Act III Acquisition Corp..
Sign up freeEvery institutional manager whose latest 13F reports this stock, largest position first. "% of their portfolio" is the weight inside that manager's own book — how much conviction the position represents; "% of company" is how much of GP-Act III Acquisition Corp. they hold. Together these 58 managers report 409.94% of shares outstanding.
| Investor | Position value | Shares | % of their portfolio | % of company | As of |
|---|---|---|---|---|---|
| Karpus Management, Inc. | $24.2M | 2,230,216 | 0.75% | 35.68% | March 31, 2026 |
| First Trust Capital Management L.P. | $22.7M | 2,091,077 | 1.19% | 33.46% | March 31, 2026 |
56 more institutional holders behind a free account
See every manager reporting GP-Act III Acquisition Corp., how much of the company they hold, and how big the position is inside their own portfolio.
Sign up freeFunds disclosing this stock in their monthly N-PORT portfolio, with the position's share of the fund's net assets. Together these 7 funds hold 35.67% of shares outstanding — counted inside the manager totals above, not on top of them, since a fund's shares also appear in its manager's 13F.
| Fund | Position value | % of net assets | % of company | As of |
|---|---|---|---|---|
| First Trust Merger Arbitrage Fund | $20.6M | 1.30% | 30.36% | March 31, 2026 |
| First Trust Multi-Strategy Fund | $1.97M | 0.15% | 2.90% | March 31, 2026 |
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