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; 51 institutions reported holding it in 13F filings for Q2 2026, worth $190.7M in total; no superinvestor holds it.
13F holders, Q2 2025
Institutional positions in Archimedes Tech SPAC Partners II Co. as of Jun 30, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 42
- +42 vs. Q1 2025
- Shares held
- 21.1M
- +21.1M vs. Q1 2025
- Total value
- $216.0M
- +$216.0M vs. Q1 2025
- New holders
- 42
- 0 more added
- Sold out
- 0
- 0 more reduced
Compare with Q1 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting ATII on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 51 | $190.7M |
| Q1 2026 | 54 | $231.3M |
| Q4 2025 | 49 | $230.4M |
| Q3 2025 | 46 | $225.0M |
| Q2 2025 | 42 | $216.0M |
| Q1 2025 | 0 | $0 |
| Q4 2024 | 0 | $0 |
| Q3 2024 | 0 | $0 |
| Q2 2024 | 0 | $0 |
| Q1 2024 | 0 | $0 |
| Q4 2023 | 0 | $0 |
| Q3 2023 | 0 | $0 |
| Q2 2023 | 0 | $0 |
| Q1 2023 | 0 | $0 |
| Q4 2022 | 0 | $0 |
| Q3 2022 | 0 | $0 |
| Q2 2022 | 0 | $0 |
| Q1 2022 | 0 | $0 |
| Q4 2021 | 0 | $0 |
| Q3 2021 | 0 | $0 |
| Q2 2021 | 0 | $0 |
| Q1 2021 | 0 | $0 |
Institutions, Q2 2025
Shares, value and share of portfolio for each institution holding Archimedes Tech SPAC Partners II Co.; share changes are against Q1 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Tenor Capital Management Co., L.P. | 1,500,000 | $15.3M | 0.21% | +1,500,000 | New |
| Sculptor Capital LP | 1,300,000 | $13.3M | 0.22% | +1,300,000 | New |
| Magnetar Financial LLC | 1,300,000 | $13.2M | 0.06% | +1,300,000 | New |
| D. E. Shaw & Co., Inc. | 1,138,500 | $11.6M | 0.01% | +1,138,500 | New |
| Linden Advisors LP | 1,000,000 | $10.2M | 0.06% | +1,000,000 | New |
| CNH Partners LLC | 969,382 | $9.92M | 0.23% | +969,382 | New |
| Glazer Capital, LLC | 875,087 | $8.95M | 0.32% | +875,087 | New |
| LMR Partners LLP | 850,000 | $8.70M | 0.14% | +850,000 | New |
| Ghisallo Capital Management LLC | 800,000 | $8.18M | 0.22% | +800,000 | New |
| Alberta Investment Management Corp | 750,000 | $7.67M | 0.06% | +750,000 | New |
| Governors Lane LP | 750,000 | $7.67M | 1.05% | +750,000 | New |
| Two Sigma Investments, LP | 725,000 | $7.42M | 0.01% | +725,000 | New |
| Hudson Bay Capital Management LP | 700,000 | $7.16M | 0.05% | +700,000 | New |
| Driehaus Capital Management LLC | 664,298 | $6.80M | 0.05% | +664,298 | New |
| Westchester Capital Management, LLC | 650,000 | $6.65M | 0.39% | +650,000 | New |
| Picton Mahoney Asset Management | 500,000 | $5.12M | 0.07% | +500,000 | New |
| Jain Global LLC | 500,000 | $5.12M | 0.08% | +500,000 | New |
| Moore Capital Management, LP | 450,000 | $4.60M | 0.09% | +450,000 | New |
| Periscope Capital Inc. | 450,000 | $4.60M | 1.74% | +450,000 | New |
| Mizuho Securities USA LLC | 455,000 | $4.60M | 0.10% | +455,000 | New |
| Commonwealth of Pennsylvania Public School Empls Retrmt Sys | 400,000 | $4.09M | 0.02% | +400,000 | New |
| Toronto Dominion Bank | 394,700 | $4.04M | 0.01% | +394,700 | New |
| Meteora Capital, LLC | 392,530 | $4.02M | 0.75% | +392,530 | New |
| Radcliffe Capital Management, L.P. | 326,920 | $3.34M | 0.25% | +326,920 | New |
| Goldman Sachs Group Inc | 323,854 | $3.31M | 0.00% | +323,854 | New |
| Schonfeld Strategic Advisors LLC | 320,000 | $3.27M | 0.02% | +320,000 | New |
| DLD Asset Management, LP | 300,000 | $3.07M | 0.36% | +300,000 | New |
| Mint Tower Capital Management B.V. | 300,000 | $3.07M | 0.46% | +300,000 | New |
| Centiva Capital, LP | 285,515 | $2.92M | 0.19% | +285,515 | New |
| Verition Fund Management LLC | 251,475 | $2.57M | 0.01% | +251,475 | New |
| Aristeia Capital LLC | 250,000 | $2.56M | 0.07% | +250,000 | New |
| Whitebox Advisors LLC | 250,000 | $2.56M | 0.07% | +250,000 | New |
| Berkley W R Corp | 228,206 | $2.33M | 0.14% | +228,206 | New |
| UBS Oconnor LLC | 200,000 | $2.05M | 0.06% | +200,000 | New |
| Shaolin Capital Management LLC | 200,000 | $2.05M | 0.09% | +200,000 | New |
| K2 Principal Fund, L.P. | 160,170 | $1.64M | 0.30% | +160,170 | New |
| Gritstone Asset Management LLC | 100,000 | $1.02M | 1.01% | +100,000 | New |
| CSS LLC | 50,000 | $511.5K | 0.03% | +50,000 | New |
| Clear Street LLC | 37,534 | $384.0K | 0.00% | +37,534 | New |
| Wolverine Asset Management LLC | 15,141 | $154.9K | 0.00% | +15,141 | New |
| Warberg Asset Management LLC | 10,000 | $102.3K | 0.03% | +10,000 | New |
| Morgan Stanley | 121 | $1.24K | 0.00% | +121 | New |