Archimedes Tech SPAC Partners III Co.
Ownership
Ownership Structure
Who owns Archimedes Tech SPAC Partners III Co. (ARCI)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 76.8% of the shares are freely tradable; institutional investors hold 57.4%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Adage Capital Partners Gp LLC | 5.10 | 1,800,000 | +0.0 | 06/30/2026 |
| Linden Advisors LLC | 3.40 | 1,200,000 | +0.0 | 06/30/2026 |
| Magnetar Financial LLC | 3.40 | 1,200,000 | +0.0 | 06/30/2026 |
| Governors Lane LP | 3.25 | 1,146,610 | +14.7 | 06/30/2026 |
| Alberta Investment Management Corp | 2.84 | 1,000,000 | +0.0 | 06/30/2026 |
| Tenor Capital Management Co Lp | 2.84 | 1,000,000 | +0.0 | 06/30/2026 |
| Verition Fund Managegment, LLC | 2.31 | 815,355 | +8.7 | 06/30/2026 |
| SONA ASSET MANAGEMENT (US) LLC | 2.27 | 800,000 | +0.0 | 06/30/2026 |
| Cnh Partners, LLC | 2.15 | 757,612 | +0.0 | 06/30/2026 |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND | 1.56 | 550,000 | +0.0 | 06/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Data as of: November 2, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.