Archimedes Tech Spac PartnerATII
13F holders, Q2 2026 (June 30)At the end of Q2 2026, 50 institutions reported holding Archimedes Tech Spac Partner (ATII) in their 13F filings, down 4 from Q1 2026. 13 opened new positions and 17 sold out. The largest holders were TENOR CAPITAL MANAGEMENT Co., L.P. ($14.7M), Fort Baker Capital Management LP ($14.3M) and Magnetar Financial LLC ($14.0M). 4 famous investors held it, including David E. Shaw (0.0% of D. E. Shaw & Co.'s portfolio), Paul Tudor Jones (0.0% of Tudor Investment Corporation's portfolio) and Ken Griffin (0.0% of Citadel Advisors's portfolio).
- Company
- Archimedes Tech Spac Partner
- CUSIP
- G04537109
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q1 2026 → Q2 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 13 | $42.3M |
| Exits | 17 | $49.4M |
All 13F filers, Q1 2026 → Q2 2026: 4,647,261 shares bought and 9,245,626 shares sold, net −4,598,365 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 50 holders
| TENOR CAPITAL MANAGEMENT Co., L.P. | 1.00% | Reduce -8.8% | 1,367,830 | $14.7M |
| Fort Baker Capital Management LP | 1.41% | New | 1,330,746 | $14.3M |
| Magnetar Financial LLC | 0.14% | Reduce -0.2% | 1,297,302 | $14.0M |
| D. E. Shaw & Co. | 0.01% | No change | 1,138,500 | $12.3M |
| Decagon Asset Management LLP | 2.05% | New | 937,829 | $10.1M |
| Linden Advisors LP | 0.41% | Reduce -15.2% | 848,273 | $9.1M |
| Ghisallo Capital Management LLC | 0.21% | No change | 800,000 | $8.6M |
| Two Sigma Investments, LP | 0.01% | No change | 725,000 | $7.8M |
| Hudson Bay Capital Management LP | 0.04% | No change | 700,000 | $7.5M |
| Shay Capital LLC | 0.74% | New | 623,687 | $6.7M |
| Governors Lane LP | 0.66% | Reduce -20.4% | 604,857 | $6.5M |
| AQR Arbitrage LLC | 0.11% | Reduce -35.9% | 590,262 | $6.4M |
| Sculptor Capital LP | 0.10% | Reduce -8.0% | 552,619 | $6.0M |
| K2 Principal Fund, L.P. | 1.47% | Add +498.7% | 526,227 | $5.7M |
| LMR Partners LLP | 0.05% | Reduce -43.6% | 478,978 | $5.2M |
| Radcliffe Capital Management, L.P. | 0.53% | Reduce -27.7% | 478,061 | $5.2M |
| Moore Capital Management, LP | 0.11% | No change | 450,000 | $4.9M |
| Alberta Investment Management Corp | 0.03% | Reduce -46.7% | 400,000 | $4.3M |
| FNY Investment Advisers, LLC | 1.29% | New | 327,200 | $3.5M |
| Mint Tower Capital Management B.V. | 0.79% | No change | 300,000 | $3.2M |
| Citadel Advisors | 0.00% | Add +2311.7% | 250,266 | $2.7M |
| Whitebox Advisors LLC | 0.14% | No change | 250,000 | $2.7M |
| Harraden Circle Investments, LLC | 0.36% | New | 234,661 | $2.5M |
| Goldman Sachs Group Inc. | 0.00% | Reduce -37.4% | 205,090 | $2.2M |
| L1 Global Manager Pty Ltd | 1.81% | No change | 200,000 | $2.2M |
| Aristeia Capital, L.L.C. | 0.08% | Reduce -20.0% | 200,000 | $2.2M |
| DLD Asset Management, LP | 0.57% | Add +30.3% | 195,453 | $2.1M |
| Jain Global LLC | 0.03% | Reduce -63.0% | 185,108 | $2.0M |
| SkyView Investment Advisors, LLC | 1.55% | New | 182,495 | $2.0M |
| Periscope Capital Inc. | 0.31% | Reduce -50.4% | 175,000 | $1.9M |
| Verition Fund Management LLC | 0.01% | Reduce -39.2% | 140,797 | $1.5M |
| MMCAP International Inc. SPC | 0.12% | No change | 125,000 | $1.3M |
| Tudor Investment Corporation | 0.01% | New | 123,842 | $1.3M |
| Cantor Fitzgerald, L. P. | 0.02% | New | 88,283 | $952K |
| Toronto Dominion Bank | 0.00% | Reduce -87.3% | 82,550 | $890K |
| Baird Financial Group, Inc. | 0.00% | No change | 78,500 | $846K |
| Shaolin Capital Management LLC | 0.09% | Reduce -71.9% | 76,171 | $821K |
| Millennium Management | 0.00% | Reduce -77.5% | 69,384 | $748K |
| Glazer Capital, LLC | 0.01% | Reduce -93.3% | 50,100 | $540K |
| Schonfeld Strategic Advisors LLC | 0.00% | Reduce -71.2% | 50,000 | $539K |
| HRT Financial LP | 0.00% | New | 47,190 | $508K |
| Clear Street Group Inc. | 0.00% | Reduce -67.7% | 25,000 | $270K |
| BNP Paribas Financial Markets | 0.00% | Reduce -37.0% | 23,790 | $256K |
| Highbridge Capital Management LLC | 0.01% | New | 17,497 | $189K |
| Readystate Asset Management LP | 0.01% | Reduce -91.6% | 12,528 | $135K |
| Geode Capital Management, LLC | 0.00% | No change | 11,102 | $120K |
| EverSource Wealth Advisors, LLC | 0.00% | New | 8,500 | $92K |
| UBS Group AG | 0.00% | New | 1,658 | $18K |
| Morgan Stanley | 0.00% | Reduce -43.5% | 35 | $377 |
| Caitong International Asset Management Co., Ltd | 0.00% | New | 4 | $43 |
"% of holder's portfolio" is ATII's weight in each manager's 13F, not the share of Archimedes Tech Spac Partner the manager owns.