Archimedes Tech SPAC Partners II (ATII)
Pursues a business combination as a Cayman Islands blank-check company.
$10.83
Pre-market+0.18 (+1.65%)
At close$10.66(+0.05%)
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Breakdown13F · 13D/G · Form 4
| Institutions54 holders · as of Mar 31, 2026 | 74.98% | 22.19M shares | |
| Insiders1 holder · as of Feb 12, 2025 | 21.22% | 6.28M shares | |
| Strategic holders1 holder · as of Feb 10, 2025 | 19.43% | 5.75M shares | |
| Adds to | 115.63% |
29.59M company shares as of Sep 3, 2026 · institutions as of Mar 31, 2026 · holders as of their latest filing
These groups come from separate filings that can overlap, so they add to 115.63%; nothing is left for Other.
Institutions13F, as of Mar 31, 2026
54 holders · 22.19M shares · 9 new positions · 15 increased · 10 reduced · 4 closed
| Holder | Shares | % outstanding | Chg q/q | Filed |
|---|---|---|---|---|
| Tenor Capital Management Co., L.P. | 1.50M | 5.07% | 0 | May 15, 2026 |
| Magnetar Financial LLC | 1.30M | 4.39% | 0 | May 13, 2026 |
| D. E. Shaw & Co., Inc. | 1.14M | 3.85% | 0 | May 15, 2026 |
| Linden Advisors LP | 1.00M | 3.38% | 0 | May 15, 2026 |
| AQR Arbitrage LLC | 920.7K | 3.11% | −43.7K | May 15, 2026 |
| Westchester Capital Management, LLC | 907.1K | 3.07% | 0 | May 15, 2026 |
| LMR Partners LLP | 850.0K | 2.87% | 0 | May 15, 2026 |
| Ghisallo Capital Management LLC | 800.0K | 2.70% | 0 | May 15, 2026 |
Ownership statements13D/G · 5% or more, as filed
| Holder | % of class | Shares | Form | Filed |
|---|---|---|---|---|
| Tenor Capital Management Company, L.P. | 5.10% | 1.50M | 13G | Nov 7, 2025 ↗ |
Insider tradesForm 4
Latest trades
Nothing filed in the last 12 months.
CongressHouse and Senate disclosures
Not reported.