Archimedes Tech SPAC Partners II Co.
ATII- Exchange
- Nasdaq
- Industry
- Blank Checks
- SEC CIK
- 0002028516
No open-market purchases or sales by Archimedes Tech SPAC Partners II Co. insiders were filed in the last 90 days; 50 institutions reported holding it in 13F filings for Q2 2026, worth $189.6M in total; no superinvestor holds it.
Q2 2026 vs. Q1 2026
How the institutions holding Archimedes Tech SPAC Partners II Co. changed between Q1 2026 and Q2 2026.
All holders in Q2 2026All holders in Q1 2026
| Measure | Q1 2026 | Q2 2026 | Change |
|---|---|---|---|
| Holders | 54 | 50 | −4 |
| Shares | 22.2M | 17.6M | −4.60M (−20.7%) |
| Value | $231.3M | $189.6M | −$41.7M (−18.0%) |
New holders (13)
Institutions that held Archimedes Tech SPAC Partners II Co. at the end of Q2 2026 but not at the end of Q1 2026.
| Institution | Shares | Value | % of portfolio |
|---|---|---|---|
| Fort Baker Capital Management LP | 1,330,746 | $14.3M | 1.14% |
| Decagon Asset Management LLP | 937,829 | $10.1M | 2.02% |
| Shay Capital LLC | 623,687 | $6.72M | 0.74% |
| FNY Investment Advisers, LLC | 327,200 | $3.53M | 1.29% |
| Harraden Circle Investments, LLC | 234,661 | $2.53M | 0.32% |
| SkyView Investment Advisors, LLC | 182,495 | $1.97M | 1.54% |
| Tudor Investment Corp Et Al | 123,842 | $1.34M | 0.01% |
| Cantor Fitzgerald, L. P. | 88,283 | $951.7K | 0.02% |
| HRT Financial LP | 47,190 | $508.0K | 0.00% |
| Highbridge Capital Management LLC | 17,497 | $189.1K | 0.01% |
| EverSource Wealth Advisors, LLC | 8,500 | $91.6K | 0.00% |
| UBS Group AG | 1,658 | $17.9K | 0.00% |
| Caitong International Asset Management Co., Ltd | 4 | $43 | 0.00% |
Sold out (17)
Institutions that held Archimedes Tech SPAC Partners II Co. at the end of Q1 2026 and filed for Q2 2026 without it.
| Institution | Shares, Q1 2026 | Value, Q1 2026 |
|---|---|---|
| Westchester Capital Management, LLC | 907,144 | $9.44M |
| Picton Mahoney Asset Management | 500,000 | $5.21M |
| Rivernorth Capital Management, LLC | 427,500 | $4.45M |
| RLH Capital LLC | 400,907 | $4.18M |
| Commonwealth of Pennsylvania Public School Empls Retrmt Sys | 400,000 | $4.17M |
| J. Goldman & Co LP | 369,778 | $3.85M |
| Meteora Capital, LLC | 295,612 | $3.08M |
| Centiva Capital, LP | 285,515 | $2.98M |
| Quarry LP | 285,000 | $2.97M |
| Berkley W R Corp | 208,065 | $2.17M |
| O'Connor Alternative Investments LLC | 200,000 | $2.09M |
| Wolverine Asset Management LLC | 134,280 | $1.40M |
| Gritstone Asset Management LLC | 99,081 | $1.03M |
| Lineage Point Capital LP | 95,895 | $1.00M |
| CSS LLC | 57,143 | $594.9K |
| Virtu Financial LLC | 53,686 | $561.0K |
| Mizuho Securities USA LLC | 19,469 | $202.5K |