Archimedes Tech SPAC Partners III Co.
ARCI- 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; 52 institutions reported holding it in 13F filings for Q2 2026, worth $202.6M 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
- 52
- +12 vs. Q1 2026
- Shares held
- 20.2M
- +4.67M (+30.0%) vs. Q1 2026
- Total value
- $202.6M
- +$49.3M (+32.2%) vs. Q1 2026
- New holders
- 16
- 9 more added
- Sold out
- 4
- 4 more reduced
Compare with Q1 2026: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting ARCI 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 | 52 | $202.6M |
| Q1 2026 | 40 | $153.3M |
| 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 |
|---|---|---|---|---|---|
| Morgan Stanley | 24 | $240 | 0.00% | +7+41.2% | Added |
| SRS Capital Advisors, Inc. | 1,500 | $15.0K | 0.00% | +1,500 | New |
| Wolverine Asset Management LLC | 32,947 | $329.8K | 0.00% | +22,860+226.6% | Added |
| Deltec Asset Management LLC | 35,000 | $350.4K | 0.05% | 00.0% | Unchanged |
| Abc Arbitrage SA | 35,000 | $350.4K | 0.04% | +35,000 | New |
| Bulldog Investors, LLP | 64,500 | $645.6K | 0.14% | +64,500 | New |
| Centiva Capital, LP | 70,050 | $701.2K | 0.02% | +70,050 | New |
| L1 Global Manager Pty Ltd | 75,000 | $750.8K | 0.61% | 00.0% | Unchanged |
| JPMorgan Chase & Co | 87,664 | $876.6K | 0.00% | 00.0% | Unchanged |
| Boothbay Fund Management, LLC | 95,000 | $951.0K | 0.02% | +95,000 | New |
| Whitebox Advisors LLC | 100,000 | $1.00M | 0.02% | 00.0% | Unchanged |
| Context Capital Management, LLC | 100,000 | $1.00M | 0.02% | 00.0% | Unchanged |
| Clear Street Group Inc. | 147,610 | $1.48M | 0.00% | −93,153−38.7% | Reduced |
| StoneX Group Inc. | 150,309 | $1.50M | 0.06% | +40,564+37.0% | Added |
| Picton Mahoney Asset Management | 149,996 | $1.50M | 0.01% | +149,996 | New |
| Millennium Management LLC | 150,000 | $1.50M | 0.00% | +150,000 | New |
| Mint Tower Capital Management B.V. | 150,000 | $1.50M | 0.18% | 00.0% | Unchanged |
| Wealthspring Capital LLC | 160,960 | $1.61M | 0.36% | +160,960 | New |
| DLD Asset Management, LP | 170,000 | $1.70M | 0.14% | 00.0% | Unchanged |
| Toronto Dominion Bank | 175,916 | $1.76M | 0.00% | +80,518+84.4% | Added |
| 683 Capital Management, LLC | 200,000 | $2.00M | 0.18% | 00.0% | Unchanged |
| Vivaldi Asset Management, LLC | 200,000 | $2.00M | 0.12% | 00.0% | Unchanged |
| Mangrove Partners | 200,000 | $2.00M | 0.13% | +200,000 | New |
| Berkley W R Corp | 248,000 | $2.48M | 0.12% | 00.0% | Unchanged |
| Ghisallo Capital Management LLC | 250,000 | $2.50M | 0.05% | 00.0% | Unchanged |
| HBK Investments L P | 250,004 | $2.50M | 0.03% | 00.0% | Unchanged |
| Two Sigma Investments, LP | 273,791 | $2.74M | 0.00% | 00.0% | Unchanged |
| Schonfeld Strategic Advisors LLC | 297,404 | $2.98M | 0.02% | +297,404 | New |
| Hudson Bay Capital Management LP | 300,000 | $3.00M | 0.01% | 00.0% | Unchanged |
| MMCAP International Inc. SPC | 300,000 | $3.00M | 0.25% | +300,000 | New |
| K2 Principal Fund, L.P. | 308,333 | $3.09M | 0.28% | +8,797+2.9% | Added |
| Commonwealth of Pennsylvania Public School Empls Retrmt Sys | 400,000 | $4.00M | 0.02% | +400,000 | New |
| Periscope Capital Inc. | 409,001 | $4.09M | 0.65% | 00.0% | Unchanged |
| Meteora Capital, LLC | 424,489 | $4.25M | 0.35% | −59,251−12.2% | Reduced |
| D. E. Shaw & Co., Inc. | 450,500 | $4.51M | 0.00% | +25,500+6.0% | Added |
| BNP Paribas Arbitrage, SA | 492,372 | $4.93M | 0.00% | +492,372 | New |
| Glazer Capital, LLC | 496,809 | $4.97M | 0.12% | −7,793−1.5% | Reduced |
| Polar Asset Management Partners Inc. | 500,000 | $5.00M | 0.09% | 00.0% | Unchanged |
| Moore Capital Management, LP | 500,000 | $5.00M | 0.11% | 00.0% | Unchanged |
| Radcliffe Capital Management, L.P. | 504,673 | $5.05M | 0.38% | +90,376+21.8% | Added |
| Rivernorth Capital Management, LLC | 500,000 | $5.08M | 0.24% | +500,000 | New |
| Shaolin Capital Management LLC | 510,386 | $5.11M | 0.29% | −30,068−5.6% | Reduced |
| Healthcare of Ontario Pension Plan Trust Fund | 550,000 | $5.51M | 0.01% | 00.0% | Unchanged |
| CNH Partners LLC | 757,612 | $7.58M | 0.11% | +757,612 | New |
| Sona Asset Management (US) LLC | 800,000 | $8.01M | 0.30% | 00.0% | Unchanged |
| Verition Fund Management LLC | 815,355 | $8.16M | 0.06% | +65,355+8.7% | Added |
| Tenor Capital Management Co., L.P. | 1,000,000 | $10.0M | 0.14% | 00.0% | Unchanged |
| Alberta Investment Management Corp | 1,000,000 | $10.0M | 0.06% | +1,000,000 | New |
| Governors Lane LP | 1,146,610 | $11.5M | 1.15% | +146,610+14.7% | Added |
| Linden Advisors LP | 1,200,000 | $12.0M | 0.06% | 00.0% | Unchanged |
| Magnetar Financial LLC | 1,200,000 | $12.0M | 0.11% | 00.0% | Unchanged |
| Adage Capital Partners GP, L.L.C. | 1,800,000 | $18.0M | 0.03% | 00.0% | Unchanged |
| Alpine Global Management, LLC | 0 | $0 | 0.00% | −150,000−100.0% | Sold out |
| Virtu Financial LLC | 0 | $0 | 0.00% | −90,734−100.0% | Sold out |
| Parallax Volatility Advisers, L.P. | 0 | $0 | 0.00% | −50,000−100.0% | Sold out |
| Royal Bank of Canada | 0 | $0 | 0.00% | −2,700−100.0% | Sold out |