Archimedes Tech SPAC Partners II Co.
ATIIW- 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; 33 institutions reported holding it in 13F filings for Q2 2026, worth $18.1M 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
- 33
- −4 vs. Q1 2026
- Shares held
- 8.37M
- −1.87M (−18.3%) vs. Q1 2026
- Total value
- $18.1M
- +$11.5M (+172.4%) vs. Q1 2026
- New holders
- 7
- 4 more added
- Sold out
- 11
- 11 more reduced
Compare with Q1 2026: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting ATIIW 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 | 33 | $18.1M |
| Q1 2026 | 37 | $6.64M |
| Q4 2025 | 37 | $7.11M |
| Q3 2025 | 35 | $5.23M |
| Q2 2025 | 36 | $5.30M |
| 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 |
|---|---|---|---|---|---|
| Harraden Circle Investments, LLC | 1,131,600 | $2.48M | 0.32% | −478,115−29.7% | Reduced |
| Aristeia Capital LLC | 788,491 | $1.71M | 0.03% | +663,491+530.8% | Added |
| Tenor Capital Management Co., L.P. | 750,000 | $1.64M | 0.02% | 00.0% | Unchanged |
| LMR Partners LLP | 613,701 | $1.34M | 0.01% | +188,701+44.4% | Added |
| Healthcare of Ontario Pension Plan Trust Fund | 500,000 | $1.09M | 0.00% | 00.0% | Unchanged |
| Linden Advisors LP | 504,138 | $1.08M | 0.01% | −356,824−41.4% | Reduced |
| CNH Partners LLC | 481,366 | $1.05M | 0.01% | +2,158+0.5% | Added |
| Magnetar Financial LLC | 437,600 | $954.0K | 0.01% | −212,400−32.7% | Reduced |
| Alberta Investment Management Corp | 375,000 | $821.2K | 0.00% | 00.0% | Unchanged |
| Decagon Asset Management LLP | 331,302 | $725.5K | 0.14% | +331,302 | New |
| D. E. Shaw & Co., Inc. | 287,500 | $626.8K | 0.00% | 00.0% | Unchanged |
| K2 Principal Fund, L.P. | 280,718 | $614.8K | 0.06% | +40,823+17.0% | Added |
| Moore Capital Management, LP | 225,000 | $492.7K | 0.01% | 00.0% | Unchanged |
| Shaolin Capital Management LLC | 181,640 | $397.8K | 0.02% | −318,360−63.7% | Reduced |
| BNP Paribas Arbitrage, SA | 161,927 | $354.6K | 0.00% | 00.0% | Unchanged |
| CSS LLC | 151,718 | $332.2K | 0.01% | −335,901−68.9% | Reduced |
| Sculptor Capital LP | 150,200 | $328.9K | 0.00% | +150,200 | New |
| Rivernorth Capital Management, LLC | 224,942 | $323.9K | 0.02% | 00.0% | Unchanged |
| Mint Tower Capital Management B.V. | 130,000 | $285.0K | 0.03% | −20,000−13.3% | Reduced |
| Whitebox Advisors LLC | 125,000 | $273.7K | 0.00% | 00.0% | Unchanged |
| Alpine Global Management, LLC | 71,039 | $155.6K | 0.03% | +71,039 | New |
| DLD Asset Management, LP | 69,400 | $152.0K | 0.01% | −30,600−30.6% | Reduced |
| MMCAP International Inc. SPC | 62,500 | $136.9K | 0.01% | 00.0% | Unchanged |
| Clear Street Group Inc. | 60,000 | $131.4K | 0.00% | −93,619−60.9% | Reduced |
| Susquehanna International Group, LLP | 48,825 | $106.4K | 0.00% | +48,825 | New |
| Fort Baker Capital Management LP | 41,177 | $90.2K | 0.01% | +41,177 | New |
| Periscope Capital Inc. | 40,000 | $87.6K | 0.01% | −158,600−79.9% | Reduced |
| Hudson Bay Capital Management LP | 39,994 | $87.2K | 0.00% | 00.0% | Unchanged |
| Lineage Point Capital LP | 35,771 | $78.3K | 0.02% | −51,916−59.2% | Reduced |
| Centiva Capital, LP | 31,450 | $68.6K | 0.00% | +31,450 | New |
| Schonfeld Strategic Advisors LLC | 30,000 | $65.7K | 0.00% | −52,192−63.5% | Reduced |
| Thomas J. Herzfeld Advisors, Inc. | 5,000 | $10.9K | 0.00% | +5,000 | New |
| Highbridge Capital Management LLC | – | $219 | 0.00% | – | – |
| Toronto Dominion Bank | 0 | $0 | 0.00% | −554,674−100.0% | Sold out |
| Westchester Capital Management, LLC | 0 | $0 | 0.00% | −199,999−100.0% | Sold out |
| Governors Lane LP | 0 | $0 | 0.00% | −197,403−100.0% | Sold out |
| Picton Mahoney Asset Management | 0 | $0 | 0.00% | −125,000−100.0% | Sold out |
| Verition Fund Management LLC | 0 | $0 | 0.00% | −87,000−100.0% | Sold out |
| Gritstone Asset Management LLC | 0 | $0 | 0.00% | −49,540−100.0% | Sold out |
| RLH Capital LLC | 0 | $0 | 0.00% | −47,382−100.0% | Sold out |
| Glazer Capital, LLC | 0 | $0 | 0.00% | −24,850−100.0% | Sold out |
| Readystate Asset Management LP | 0 | $0 | 0.00% | −25,000−100.0% | Sold out |
| Quarry LP | 0 | $0 | 0.00% | −23,691−100.0% | Sold out |
| UBS Group AG | 0 | $0 | 0.00% | −2,963−100.0% | Sold out |