Archimedes Tech SPAC Partners II Co.
ATIIU- 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; 4 institutions reported holding it in 13F filings for Q2 2026, worth $1.32M in total; no superinvestor holds it.
13F holders, Q1 2025
Institutional positions in Archimedes Tech SPAC Partners II Co. as of Mar 31, 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
- 44
- +44 vs. Q4 2024
- Shares held
- 19.3M
- +19.3M vs. Q4 2024
- Total value
- $194.1M
- +$194.1M vs. Q4 2024
- New holders
- 44
- 0 more added
- Sold out
- 0
- 0 more reduced
Compare with Q4 2024: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting ATIIU 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 | 4 | $1.32M |
| Q1 2026 | 5 | $1.18M |
| Q4 2025 | 4 | $2.37M |
| Q3 2025 | 6 | $3.46M |
| Q2 2025 | 9 | $13.4M |
| Q1 2025 | 44 | $194.1M |
| 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, Q1 2025
Shares, value and share of portfolio for each institution holding Archimedes Tech SPAC Partners II Co.; share changes are against Q4 2024.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| UBS Group AG | 1,000 | $10.1K | 0.00% | +1,000 | New |
| Warberg Asset Management LLC | 10,000 | $100.9K | 0.03% | +10,000 | New |
| Tuttle Tactical Management | 20,000 | $201.4K | 0.88% | +20,000 | New |
| Highbridge Capital Management LLC | 25,000 | $252.5K | 0.01% | +25,000 | New |
| Wolverine Asset Management LLC | 25,900 | $260.8K | 0.01% | +25,900 | New |
| Jane Street Group, LLC | 65,110 | $657.0K | 0.00% | +65,110 | New |
| Wealthspring Capital LLC | 77,376 | $780.0K | 1.20% | +77,376 | New |
| Gritstone Asset Management LLC | 100,000 | $1.01M | 1.06% | +100,000 | New |
| Parallax Volatility Advisers, L.P. | 100,000 | $1.01M | 0.03% | +100,000 | New |
| MMCAP International Inc. SPC | 125,000 | $1.26M | 0.21% | +125,000 | New |
| DLD Asset Management, LP | 150,000 | $1.51M | 0.22% | +150,000 | New |
| Centiva Capital, LP | 150,000 | $1.51M | 0.09% | +150,000 | New |
| Clear Street LLC | 166,517 | $1.68M | 0.03% | +166,517 | New |
| Atw Spac Management LLC | 218,600 | $2.20M | 3.67% | +218,600 | New |
| Boothbay Fund Management, LLC | 218,600 | $2.21M | 0.08% | +218,600 | New |
| Berkley W R Corp | 228,206 | $2.30M | 0.17% | +228,206 | New |
| Whitebox Advisors LLC | 250,000 | $2.52M | 0.08% | +250,000 | New |
| Crossingbridge Advisors, LLC | 250,000 | $2.52M | 1.34% | +250,000 | New |
| Picton Mahoney Asset Management | 250,000 | $2.52M | 0.09% | +250,000 | New |
| Aristeia Capital LLC | 250,000 | $2.52M | 0.08% | +250,000 | New |
| Verition Fund Management LLC | 291,500 | $2.94M | 0.02% | +291,500 | New |
| Mint Tower Capital Management B.V. | 300,000 | $3.02M | 1.12% | +300,000 | New |
| Periscope Capital Inc. | 300,000 | $3.03M | 1.69% | +300,000 | New |
| K2 Principal Fund, L.P. | 319,790 | $3.22M | 0.49% | +319,790 | New |
| Schonfeld Strategic Advisors LLC | 350,000 | $3.53M | 0.02% | +350,000 | New |
| Westchester Capital Management, LLC | 400,000 | $4.03M | 0.23% | +400,000 | New |
| Rivernorth Capital Management, LLC | 450,000 | $4.54M | 0.24% | +450,000 | New |
| Moore Capital Management, LP | 450,000 | $4.54M | 0.15% | +450,000 | New |
| Millennium Management LLC | 500,000 | $5.04M | 0.00% | +500,000 | New |
| JPMorgan Chase & Co | 543,595 | $5.49M | 0.00% | +543,595 | New |
| D. E. Shaw & Co., Inc. | 575,000 | $5.81M | 0.01% | +575,000 | New |
| Mizuho Securities USA LLC | 600,000 | $6.01M | 0.13% | +600,000 | New |
| Shaolin Capital Management LLC | 650,531 | $6.55M | 0.27% | +650,531 | New |
| Hudson Bay Capital Management LP | 700,000 | $7.07M | 0.04% | +700,000 | New |
| Two Sigma Investments, LP | 725,000 | $7.31M | 0.02% | +725,000 | New |
| Ghisallo Capital Management LLC | 800,000 | $8.06M | 0.70% | +800,000 | New |
| CSS LLC | 820,803 | $8.27M | 0.58% | +820,803 | New |
| Glazer Capital, LLC | 839,370 | $8.46M | 0.39% | +839,370 | New |
| LMR Partners LLP | 850,000 | $8.56M | 0.17% | +850,000 | New |
| Linden Advisors LP | 1,000,000 | $10.1M | 0.07% | +1,000,000 | New |
| Healthcare of Ontario Pension Plan Trust Fund | 1,000,000 | $10.1M | 0.02% | +1,000,000 | New |
| Magnetar Financial LLC | 1,300,000 | $13.1M | 0.17% | +1,300,000 | New |
| CNH Partners LLC | 1,303,242 | $13.1M | 0.32% | +1,303,242 | New |
| Tenor Capital Management Co., L.P. | 1,500,000 | $15.2M | 0.22% | +1,500,000 | New |