Archimedes Tech SPAC Partners III Co.
ARCIW- Exchange
- Nasdaq
- Industry
- Blank Checks
- SEC CIK
- 0002083910
No open-market purchases or sales by Archimedes Tech SPAC Partners III Co. insiders were filed in the last 90 days; 41 institutions reported holding it in 13F filings for Q2 2026, worth $3.46M in total; no superinvestor holds it.
13F holders, Q2 2026
Institutional positions in Archimedes Tech SPAC Partners III 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
- 41
- +12 vs. Q1 2026
- Shares held
- 4.66M
- +1.09M (+30.7%) vs. Q1 2026
- Total value
- $3.46M
- +$1.19M (+52.6%) vs. Q1 2026
- New holders
- 15
- 5 more added
- Sold out
- 3
- 6 more reduced
Compare with Q1 2026: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting ARCIW 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 | 41 | $3.46M |
| Q1 2026 | 29 | $2.27M |
| Q4 2025 | 0 | $0 |
| Q3 2025 | 0 | $0 |
| Q2 2025 | 0 | $0 |
| 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 III Co.; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Boothbay Fund Management, LLC | 25,000 | $250.3K | 0.00% | +25,000 | New |
| Centiva Capital, LP | 324,439 | $243.3K | 0.01% | +324,439 | New |
| Magnetar Financial LLC | 300,000 | $225.0K | 0.00% | 00.0% | Unchanged |
| Linden Advisors LP | 299,999 | $187.6K | 0.00% | 00.0% | Unchanged |
| Tenor Capital Management Co., L.P. | 250,000 | $187.5K | 0.00% | 00.0% | Unchanged |
| Alberta Investment Management Corp | 250,000 | $187.5K | 0.00% | +250,000 | New |
| Governors Lane LP | 250,000 | $156.4K | 0.02% | 00.0% | Unchanged |
| K2 Principal Fund, L.P. | 308,837 | $154.4K | 0.01% | +27,060+9.6% | Added |
| Adage Capital Partners GP, L.L.C. | 200,000 | $150.0K | 0.00% | −175,000−46.7% | Reduced |
| Sona Asset Management (US) LLC | 200,000 | $150.0K | 0.01% | 00.0% | Unchanged |
| CNH Partners LLC | 189,403 | $142.1K | 0.00% | +189,403 | New |
| Verition Fund Management LLC | 187,200 | $140.4K | 0.00% | −300−0.2% | Reduced |
| Healthcare of Ontario Pension Plan Trust Fund | 137,500 | $103.1K | 0.00% | 00.0% | Unchanged |
| Polar Asset Management Partners Inc. | 129,300 | $97.0K | 0.00% | +4,300+3.4% | Added |
| Moore Capital Management, LP | 125,000 | $93.8K | 0.00% | 00.0% | Unchanged |
| Shaolin Capital Management LLC | 114,720 | $86.0K | 0.00% | +4,609+4.2% | Added |
| Rivernorth Capital Management, LLC | 125,000 | $81.3K | 0.00% | +125,000 | New |
| D. E. Shaw & Co., Inc. | 106,250 | $79.7K | 0.00% | 00.0% | Unchanged |
| BNP Paribas Arbitrage, SA | 123,093 | $77.0K | 0.00% | +123,093 | New |
| Periscope Capital Inc. | 101,100 | $63.2K | 0.01% | 00.0% | Unchanged |
| Commonwealth of Pennsylvania Public School Empls Retrmt Sys | 100,000 | $62.5K | 0.00% | +100,000 | New |
| MMCAP International Inc. SPC | 75,000 | $56.3K | 0.00% | +75,000 | New |
| Radcliffe Capital Management, L.P. | 81,385 | $50.9K | 0.00% | +43+0.1% | Added |
| HBK Investments L P | 62,501 | $46.9K | 0.00% | 00.0% | Unchanged |
| Meteora Capital, LLC | 83,985 | $42.1K | 0.00% | −39,735−32.1% | Reduced |
| Clear Street Group Inc. | 55,206 | $41.4K | 0.00% | −3,094−5.3% | Reduced |
| 683 Capital Management, LLC | 50,000 | $37.5K | 0.00% | 00.0% | Unchanged |
| Parallax Volatility Advisers, L.P. | 50,000 | $37.5K | 0.00% | +50,000 | New |
| DLD Asset Management, LP | 42,499 | $31.9K | 0.00% | 00.0% | Unchanged |
| Glazer Capital, LLC | 50,000 | $31.0K | 0.00% | −68,814−57.9% | Reduced |
| Picton Mahoney Asset Management | 37,499 | $28.1K | 0.00% | +37,499 | New |
| Mint Tower Capital Management B.V. | 37,500 | $28.0K | 0.00% | 00.0% | Unchanged |
| Schonfeld Strategic Advisors LLC | 40,000 | $25.0K | 0.00% | +40,000 | New |
| Wealthspring Capital LLC | 40,870 | $20.5K | 0.00% | +40,870 | New |
| Alpine Global Management, LLC | 40,200 | $20.1K | 0.00% | +2,700+7.2% | Added |
| Whitebox Advisors LLC | 25,000 | $18.8K | 0.00% | 00.0% | Unchanged |
| Context Capital Management, LLC | 25,000 | $15.9K | 0.00% | 00.0% | Unchanged |
| Bulldog Investors, LLP | 15,000 | $11.3K | 0.00% | +15,000 | New |
| SRS Capital Advisors, Inc. | 375 | $188 | 0.00% | +375 | New |
| UBS Group AG | 57 | $29 | 0.00% | +57 | New |
| Royal Bank of Canada | 375 | $0 | 0.00% | −300−44.4% | Reduced |
| L1 Global Manager Pty Ltd | 0 | $0 | 0.00% | −18,750−100.0% | Sold out |
| Virtu Financial LLC | 0 | $0 | 0.00% | −19,000−100.0% | Sold out |
| Hudson Bay Capital Management LP | 0 | $0 | 0.00% | −15,001−100.0% | Sold out |