Who owns AmperCap Acquisition Co, 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.
Sculptor Capital LP: 5.1% · 1,021,965 shares — Sculptor Capital II LP: 5.1% · 1,021,965 shares — Sculptor Capital Holding Corp: 5.1% · 1,021,965 shares
MAGNETAR FINANCIAL LLC: 8.1% · 1,200,000 shares — MAGNETAR CAPITAL PARTNERS LP: 8.1% · 1,200,000 shares — SUPERNOVA MANAGEMENT LLC: 8.1% · 1,200,000 shares
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See every investor who has disclosed crossing 5% of AmperCap Acquisition Co.
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 AmperCap Acquisition Co they hold. Together these 52 managers report 67.60% of shares outstanding.
| Investor | Position value | Shares | % of their portfolio | % of company | As of |
|---|---|---|---|---|---|
| Magnetar Financial LLC | $12M | 1,200,000 | 0.11% | 6.01% | June 30, 2026 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | $11.1M | 1,125,000 | 0.02% | 5.64% | June 30, 2026 |
50 more institutional holders behind a free account
See every manager reporting AmperCap Acquisition Co, 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 2 funds hold 0.67% 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 |
|---|---|---|---|---|
| RiverNorth Opportunities Fund Inc. | $1M | 0.30% | 0.50% | June 30, 2026 |
| Special Opportunities Fund, Inc. | $339K | 0.19% | 0.17% | June 30, 2026 |
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