Who owns Archimedes Tech SPAC Partners II 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.
Tenor Capital Management Company, L.P.: 4.6% · 1,367,830 shares — Tenor Opportunity Master Fund, Ltd.: 4.6% · 1,367,830 shares — Robin Shah: 4.6% · 1,367,830 shares
Barclays PLC: 3.9% · 1,148,590 shares
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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 Archimedes Tech SPAC Partners II Co. they hold. Together these 72 managers report 78.03% of shares outstanding.
| Investor | Position value | Shares | % of their portfolio | % of company | As of |
|---|---|---|---|---|---|
| TENOR CAPITAL MANAGEMENT Co., L.P. | $14.7M | 1,367,830 | 0.21% | 4.62% | June 30, 2026 |
| Fort Baker Capital Management LP | $14.3M | 1,330,746 | 1.05% | 4.50% | June 30, 2026 |
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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 6 funds hold 2.36% 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 |
|---|---|---|---|---|
| Destinations Multi Strategy Alternatives Fund | $4.28M | 0.80% | 1.37% | February 28, 2026 |
| Driehaus Event Driven Fund | $1.73M | 1.94% | 0.56% | December 31, 2025 |
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