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.
Q1 2026 vs. Q4 2025
How the institutions holding Archimedes Tech SPAC Partners II Co. changed between Q4 2025 and Q1 2026.
All holders in Q1 2026All holders in Q4 2025
| Measure | Q4 2025 | Of which not filed for Q1 2026 | Q1 2026 | Change |
|---|---|---|---|---|
| Holders | 49 | 1 | 54 | +6 |
| Shares | 22.2M | 200.0K | 22.2M | +140.9K (+0.6%) |
| Value | $230.4M | $2.07M | $231.3M | +$2.92M (+1.3%) |
1 institution that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so the changes leave them out.
New holders (9)
Institutions that held Archimedes Tech SPAC Partners II Co. at the end of Q1 2026 but not at the end of Q4 2025.
| Institution | Shares | Value | % of portfolio |
|---|---|---|---|
| RLH Capital LLC | 400,907 | $4.18M | 2.13% |
| J. Goldman & Co LP | 369,778 | $3.85M | 0.18% |
| Quarry LP | 285,000 | $2.97M | 0.60% |
| O'Connor Alternative Investments LLC | 200,000 | $2.09M | 0.11% |
| Lineage Point Capital LP | 95,895 | $1.00M | 0.24% |
| Virtu Financial LLC | 53,686 | $561.0K | 0.02% |
| BNP Paribas Arbitrage, SA | 37,744 | $392.9K | 0.00% |
| Geode Capital Management, LLC | 11,102 | $115.6K | 0.00% |
| Citadel Advisors LLC | 10,377 | $108.4K | 0.00% |
Sold out (3)
Institutions that held Archimedes Tech SPAC Partners II Co. at the end of Q4 2025 and filed for Q1 2026 without it.
| Institution | Shares, Q4 2025 | Value, Q4 2025 |
|---|---|---|
| Driehaus Capital Management LLC | 573,083 | $5.94M |
| StoneX Group Inc. | 50,613 | $524.4K |
| Warberg Asset Management LLC | 10,000 | $103.6K |
Not filed for Q1 2026 yet (1)
Institutions that held Archimedes Tech SPAC Partners II Co. at the end of Q4 2025 and haven't filed a 13F for Q1 2026. Not filing isn't selling, so they aren't counted as sold out.
| Institution | Shares, Q4 2025 | Value, Q4 2025 |
|---|---|---|
| UBS Oconnor LLC | 200,000 | $2.07M |