Archimedes Tech Spac PartnerARCI
13F holders, Q2 2026 (June 30)52holders +12
4new positions
4sold out
2famous investors
$10.01avg. 13F price*
At the end of Q2 2026, 52 institutions reported holding Archimedes Tech Spac Partner (ARCI) in their 13F filings, up 12 from Q1 2026. 4 opened new positions and 4 sold out. The largest holders were Adage Capital Partners Gp, L.L.C. ($18.0M), Linden Advisors LP ($12.0M) and Magnetar Financial LLC ($12.0M). 2 famous investors held it, including David E. Shaw (0.0% of D. E. Shaw & Co.'s portfolio) and Israel Englander (0.0% of Millennium Management's portfolio).
- Company
- Archimedes Tech Spac Partner
- CUSIP
- G0453R105
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q1 2026 → Q2 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 4 | $4.2M |
| Exits | 4 | $2.9M |
All 13F filers, Q1 2026 → Q2 2026: 963,173 shares bought and 502,219 shares sold, net +460,954 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 52 holders
| Adage Capital Partners Gp, L.L.C. | 0.03% | No change | 1,800,000 | $18.0M |
| Linden Advisors LP | 0.53% | No change | 1,200,000 | $12.0M |
| Magnetar Financial LLC | 0.12% | No change | 1,200,000 | $12.0M |
| Governors Lane LP | 1.16% | Add +14.7% | 1,146,610 | $11.5M |
| TENOR CAPITAL MANAGEMENT Co., L.P. | 0.68% | No change | 1,000,000 | $10.0M |
| Alberta Investment Management Corp | 0.06% | No change | 1,000,000 | $10.0M |
| Verition Fund Management LLC | 0.06% | Add +8.7% | 815,355 | $8.2M |
| Sona Asset Management (us) LLC | 0.39% | No change | 800,000 | $8.0M |
| AQR Arbitrage LLC | 0.13% | No change | 757,612 | $7.6M |
| Healthcare of Ontario Pension Plan Trust Fund | 0.01% | No change | 550,000 | $5.5M |
| Shaolin Capital Management LLC | 0.58% | Reduce -5.6% | 510,386 | $5.1M |
| Rivernorth Capital Management, LLC | 0.24% | No change | 500,000 | $5.1M |
| Radcliffe Capital Management, L.P. | 0.52% | Add +21.8% | 504,673 | $5.1M |
| Polar Asset Management Partners Inc. | 0.12% | No change | 500,000 | $5.0M |
| Moore Capital Management, LP | 0.12% | No change | 500,000 | $5.0M |
| Glazer Capital, LLC | 0.13% | Reduce -1.5% | 496,809 | $5.0M |
| BNP Paribas Financial Markets | 0.00% | No change | 492,372 | $4.9M |
| D. E. Shaw & Co. | 0.00% | Add +6.0% | 450,500 | $4.5M |
| Meteora Capital, LLC | 0.36% | Reduce -12.3% | 424,489 | $4.2M |
| Periscope Capital Inc. | 0.68% | No change | 409,001 | $4.1M |
| Commonwealth of Pennsylvania Public School Empls Retrmt SYS | 0.02% | No change | 400,000 | $4.0M |
| K2 Principal Fund, L.P. | 0.80% | Add +2.9% | 308,333 | $3.1M |
| MMCAP International Inc. SPC | 0.26% | No change | 300,000 | $3.0M |
| Hudson Bay Capital Management LP | 0.02% | No change | 300,000 | $3.0M |
| Schonfeld Strategic Advisors LLC | 0.02% | Add +25.8% | 297,404 | $3.0M |
| Two Sigma Investments, LP | 0.00% | No change | 273,791 | $2.7M |
| HBK Investments L P | 0.03% | No change | 250,004 | $2.5M |
| Ghisallo Capital Management LLC | 0.06% | No change | 250,000 | $2.5M |
| Berkley W R Corp. | 0.12% | No change | 248,000 | $2.5M |
| 683 Capital Management, LLC | 0.19% | No change | 200,000 | $2.0M |
| Mangrove Partners Im, LLC | 0.13% | New | 200,000 | $2.0M |
| First Trust Capital Management L.P. | 0.12% | No change | 200,000 | $2.0M |
| Toronto Dominion Bank | 0.00% | Add +84.4% | 175,916 | $1.8M |
| DLD Asset Management, LP | 0.46% | No change | 170,000 | $1.7M |
| Wealthspring Capital LLC | 0.37% | Reduce -3.3% | 160,960 | $1.6M |
| Mint Tower Capital Management B.V. | 0.37% | No change | 150,000 | $1.5M |
| Millennium Management | 0.00% | New | 150,000 | $1.5M |
| Picton Mahoney Asset Management | 0.01% | No change | 149,996 | $1.5M |
| StoneX Group Inc. | 0.06% | Add +37.0% | 150,309 | $1.5M |
| Clear Street Group Inc. | 0.00% | Reduce -38.7% | 147,610 | $1.5M |
| Context Capital Management, LLC | 0.21% | No change | 100,000 | $1.0M |
| Whitebox Advisors LLC | 0.05% | No change | 100,000 | $1.0M |
| Boothbay Fund Management, LLC | 0.02% | Reduce -5.0% | 95,000 | $951K |
| JPMorgan Chase & Co. | 0.00% | No change | 87,664 | $877K |
| L1 Global Manager Pty Ltd | 0.63% | No change | 75,000 | $751K |
| Centiva Capital, LP | 0.02% | New | 70,050 | $701K |
| Bulldog Investors, LLP | 0.14% | Reduce -4.4% | 64,500 | $646K |
| Deltec Asset Management LLC | 0.05% | No change | 35,000 | $350K |
| Abc Arbitrage SA | 0.04% | Reduce -12.5% | 35,000 | $350K |
| Wolverine Asset Management LLC | 0.02% | Add +226.6% | 32,947 | $330K |
| Arax Advisory Partners | 0.00% | New | 1,500 | $15K |
| Morgan Stanley | 0.00% | Add +41.2% | 24 | $240 |
"% of holder's portfolio" is ARCI's weight in each manager's 13F, not the share of Archimedes Tech Spac Partner the manager owns.