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.
13F holders, Q2 2026
Institutional positions in Archimedes Tech SPAC Partners II Co. as of Jun 30, 2026. 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
- 50
- −4 vs. Q1 2026
- Shares held
- 17.6M
- −4.60M (−20.7%) vs. Q1 2026
- Total value
- $189.6M
- −$41.7M (−18.0%) vs. Q1 2026
- New holders
- 13
- 3 more added
- Sold out
- 17
- 23 more reduced
Compare with Q1 2026: 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 | 50 | $189.6M |
| 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 2026
Shares, value and share of portfolio for each institution holding Archimedes Tech SPAC Partners II Co.; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Caitong International Asset Management Co., Ltd | 4 | $43 | 0.00% | +4 | New |
| Morgan Stanley | 35 | $377 | 0.00% | −27−43.5% | Reduced |
| UBS Group AG | 1,658 | $17.9K | 0.00% | +1,658 | New |
| EverSource Wealth Advisors, LLC | 8,500 | $91.6K | 0.00% | +8,500 | New |
| Geode Capital Management, LLC | 11,102 | $119.7K | 0.00% | 00.0% | Unchanged |
| Readystate Asset Management LP | 12,528 | $135.1K | 0.01% | −136,206−91.6% | Reduced |
| Highbridge Capital Management LLC | 17,497 | $189.1K | 0.01% | +17,497 | New |
| BNP Paribas Arbitrage, SA | 23,790 | $256.5K | 0.00% | −13,954−37.0% | Reduced |
| Clear Street Group Inc. | 25,000 | $269.5K | 0.00% | −52,452−67.7% | Reduced |
| HRT Financial LP | 47,190 | $508.0K | 0.00% | +47,190 | New |
| Schonfeld Strategic Advisors LLC | 50,000 | $539.0K | 0.00% | −123,515−71.2% | Reduced |
| Glazer Capital, LLC | 50,100 | $540.0K | 0.01% | −699,900−93.3% | Reduced |
| Millennium Management LLC | 69,384 | $748.0K | 0.00% | −238,601−77.5% | Reduced |
| Shaolin Capital Management LLC | 76,171 | $821.1K | 0.05% | −194,612−71.9% | Reduced |
| Baird Financial Group, Inc. | 78,500 | $846.2K | 0.00% | 00.0% | Unchanged |
| Toronto Dominion Bank | 82,550 | $889.9K | 0.00% | −567,450−87.3% | Reduced |
| Cantor Fitzgerald, L. P. | 88,283 | $951.7K | 0.02% | +88,283 | New |
| Tudor Investment Corp Et Al | 123,842 | $1.34M | 0.01% | +123,842 | New |
| MMCAP International Inc. SPC | 125,000 | $1.35M | 0.11% | 00.0% | Unchanged |
| Verition Fund Management LLC | 140,797 | $1.52M | 0.01% | −90,673−39.2% | Reduced |
| Periscope Capital Inc. | 175,000 | $1.89M | 0.30% | −177,880−50.4% | Reduced |
| SkyView Investment Advisors, LLC | 182,495 | $1.97M | 1.54% | +182,495 | New |
| Jain Global LLC | 185,108 | $2.00M | 0.02% | −314,892−63.0% | Reduced |
| DLD Asset Management, LP | 195,453 | $2.11M | 0.17% | +45,453+30.3% | Added |
| Aristeia Capital LLC | 200,000 | $2.16M | 0.03% | −50,000−20.0% | Reduced |
| L1 Global Manager Pty Ltd | 200,000 | $2.16M | 1.75% | 00.0% | Unchanged |
| Goldman Sachs Group Inc | 205,090 | $2.21M | 0.00% | −122,360−37.4% | Reduced |
| Harraden Circle Investments, LLC | 234,661 | $2.53M | 0.32% | +234,661 | New |
| Whitebox Advisors LLC | 250,000 | $2.69M | 0.04% | 00.0% | Unchanged |
| Citadel Advisors LLC | 250,266 | $2.70M | 0.00% | +239,889+2,311.7% | Added |
| Mint Tower Capital Management B.V. | 300,000 | $3.23M | 0.38% | 00.0% | Unchanged |
| FNY Investment Advisers, LLC | 327,200 | $3.53M | 1.29% | +327,200 | New |
| Alberta Investment Management Corp | 400,000 | $4.31M | 0.02% | −350,000−46.7% | Reduced |
| Moore Capital Management, LP | 450,000 | $4.85M | 0.11% | 00.0% | Unchanged |
| Radcliffe Capital Management, L.P. | 478,061 | $5.15M | 0.39% | −183,276−27.7% | Reduced |
| LMR Partners LLP | 478,978 | $5.16M | 0.04% | −371,022−43.6% | Reduced |
| K2 Principal Fund, L.P. | 526,227 | $5.67M | 0.52% | +438,327+498.7% | Added |
| Sculptor Capital LP | 552,619 | $5.96M | 0.06% | −48,027−8.0% | Reduced |
| CNH Partners LLC | 590,262 | $6.36M | 0.09% | −330,410−35.9% | Reduced |
| Governors Lane LP | 604,857 | $6.52M | 0.65% | −154,699−20.4% | Reduced |
| Shay Capital LLC | 623,687 | $6.72M | 0.74% | +623,687 | New |
| Hudson Bay Capital Management LP | 700,000 | $7.55M | 0.04% | 00.0% | Unchanged |
| Two Sigma Investments, LP | 725,000 | $7.82M | 0.01% | 00.0% | Unchanged |
| Ghisallo Capital Management LLC | 800,000 | $8.62M | 0.17% | 00.0% | Unchanged |
| Linden Advisors LP | 848,273 | $9.14M | 0.05% | −151,727−15.2% | Reduced |
| Decagon Asset Management LLP | 937,829 | $10.1M | 2.02% | +937,829 | New |
| D. E. Shaw & Co., Inc. | 1,138,500 | $12.3M | 0.01% | 00.0% | Unchanged |
| Magnetar Financial LLC | 1,297,302 | $14.0M | 0.13% | −2,698−0.2% | Reduced |
| Fort Baker Capital Management LP | 1,330,746 | $14.3M | 1.14% | +1,330,746 | New |
| Tenor Capital Management Co., L.P. | 1,367,830 | $14.7M | 0.21% | −132,170−8.8% | Reduced |
| Westchester Capital Management, LLC | 0 | $0 | 0.00% | −907,144−100.0% | Sold out |
| Picton Mahoney Asset Management | 0 | $0 | 0.00% | −500,000−100.0% | Sold out |
| Rivernorth Capital Management, LLC | 0 | $0 | 0.00% | −427,500−100.0% | Sold out |
| RLH Capital LLC | 0 | $0 | 0.00% | −400,907−100.0% | Sold out |
| Commonwealth of Pennsylvania Public School Empls Retrmt Sys | 0 | $0 | 0.00% | −400,000−100.0% | Sold out |
| J. Goldman & Co LP | 0 | $0 | 0.00% | −369,778−100.0% | Sold out |
| Meteora Capital, LLC | 0 | $0 | 0.00% | −295,612−100.0% | Sold out |
| Centiva Capital, LP | 0 | $0 | 0.00% | −285,515−100.0% | Sold out |
| Quarry LP | 0 | $0 | 0.00% | −285,000−100.0% | Sold out |
| Berkley W R Corp | 0 | $0 | 0.00% | −208,065−100.0% | Sold out |
| O'Connor Alternative Investments LLC | 0 | $0 | 0.00% | −200,000−100.0% | Sold out |
| Wolverine Asset Management LLC | 0 | $0 | 0.00% | −134,280−100.0% | Sold out |
| Gritstone Asset Management LLC | 0 | $0 | 0.00% | −99,081−100.0% | Sold out |
| Lineage Point Capital LP | 0 | $0 | 0.00% | −95,895−100.0% | Sold out |
| CSS LLC | 0 | $0 | 0.00% | −57,143−100.0% | Sold out |
| Virtu Financial LLC | 0 | $0 | 0.00% | −53,686−100.0% | Sold out |
| Mizuho Securities USA LLC | 0 | $0 | 0.00% | −19,469−100.0% | Sold out |