Archimedes Tech SPAC Partners II Co. - ATII
Detailed investor-level table based on 13F positions.
Methodology:
Market value and % of portfolio use SEC reported VALUE ($000).
For PUT/CALL positions this reflects reported underlying exposure, not premium cash paid/received.
Details.
Rows: 0
| Investor | History | Status | Shares held | Market value ($000) | % of portfolio | Previous % | Rank | Change in shares | % change in shares | Source | Date reported |
|---|---|---|---|---|---|---|---|---|---|---|---|
| TENOR CAPITAL MANAGEMENT Co., L.P. | History | No change | 1,500,000 | 15,540 | 0.22% | 0.2% | 1 | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| Magnetar Financial LLC | History | No change | 1,300,000 | 13,468 | 0.13% | 0.08% | 2 | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| D. E. Shaw & Co., Inc. | History | No change | 1,138,500 | 11,794 | 0.01% | 0.01% | 3 | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| LINDEN ADVISORS LP | History | No change | 1,000,000 | 10,360 | 0.06% | 0.07% | 4 | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| AQR Arbitrage LLC | History | No change | 964,382 | 9,990 | 0.21% | 0.25% | 5 | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| Westchester Capital Management, LLC | History | Added to | 907,144 | 9,398 | 0.39% | 0.42% | 6 | +7,144 | 0.79% | Q4 2025 | Feb 13, 2026 |
| GLAZER CAPITAL, LLC | History | Reduced | 864,303 | 8,954 | 0.24% | 0.3% | 7 | -10,784 | -1.23% | Q4 2025 | Feb 13, 2026 |
| LMR Partners LLP | History | No change | 850,000 | 8,806 | 0.02% | 0.04% | 8 | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| Ghisallo Capital Management LLC | History | No change | 800,000 | 8,288 | 0.37% | 0.27% | 9 | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| Governors Lane LP | History | Added to | 758,617 | 7,859 | 0.47% | 0.59% | 10 | +8,617 | 1.15% | Q4 2025 | Feb 17, 2026 |
| Alberta Investment Management Corp | History | No change | 750,000 | 7,770 | 0.05% | 0.05% | 11 | 0 | 0.0% | Q4 2025 | Feb 19, 2026 |
| TWO SIGMA INVESTMENTS, LP | History | No change | 725,000 | 7,511 | 0.01% | 0.01% | 12 | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| METEORA CAPITAL, LLC | History | Added to | 718,433 | 7,442 | 0.62% | 0.7% | 13 | +68,533 | 10.55% | Q4 2025 | Feb 17, 2026 |
| Hudson Bay Capital Management LP | History | No change | 700,000 | 7,252 | 0.02% | 0.02% | 14 | 0 | 0.0% | Q4 2025 | Feb 13, 2026 |
| Radcliffe Capital Management, L.P. | History | Added to | 658,322 | 6,820 | 0.37% | 0.39% | 15 | +46,800 | 7.65% | Q4 2025 | Feb 17, 2026 |
| Sculptor Capital LP | History | Reduced | 600,646 | 6,222 | 0.06% | 0.09% | 16 | -139,354 | -18.83% | Q4 2025 | Feb 13, 2026 |
| DRIEHAUS CAPITAL MANAGEMENT LLC | History | No change | 573,083 | 5,937 | 0.04% | 0.04% | 17 | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| PICTON MAHONEY ASSET MANAGEMENT | History | No change | 500,000 | 5,180 | 0.04% | 0.05% | 18 | 0 | 0.0% | Q4 2025 | Feb 11, 2026 |
| Jain Global LLC | History | No change | 500,000 | 5,180 | 0.03% | 0.02% | 19 | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| MOORE CAPITAL MANAGEMENT, LP | History | No change | 450,000 | 4,662 | 0.07% | 0.06% | 20 | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| PERISCOPE CAPITAL INC. | History | Reduced | 448,100 | 4,642 | 0.53% | 0.81% | 21 | -51,900 | -10.38% | Q4 2025 | Feb 10, 2026 |
| RIVERNORTH CAPITAL MANAGEMENT, LLC | History | Reduced | 447,750 | 4,638 | 0.22% | 0.26% | 22 | -2,135 | -0.47% | Q4 2025 | Feb 17, 2026 |
| COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS | History | No change | 400,000 | 4,144 | 0.02% | 0.02% | 23 | 0 | 0.0% | Q4 2025 | Feb 10, 2026 |
| WOLVERINE ASSET MANAGEMENT LLC | History | Reduced | 355,354 | 3,681 | 0.03% | 0.03% | 24 | -100,972 | -22.13% | Q4 2025 | Feb 02, 2026 |
| GOLDMAN SACHS GROUP INC | History | No change | 323,854 | 3,355 | 0.0% | 0.0% | 25 | 0 | 0.0% | Q4 2025 | Mar 25, 2026 |
| MILLENNIUM MANAGEMENT LLC | History | Added to | 307,985 | 3,190 | 0.0% | 0.0% | 26 | +4,020 | 1.32% | Q4 2025 | Feb 17, 2026 |
| MIZUHO SECURITIES USA LLC | History | Reduced | 303,827 | 3,114 | 0.05% | 0.07% | 27 | -31,271 | -9.33% | Q4 2025 | Feb 09, 2026 |
| Mint Tower Capital Management B.V. | History | No change | 300,000 | 3,108 | 0.36% | 0.36% | 28 | 0 | 0.0% | Q4 2025 | Feb 12, 2026 |
| Centiva Capital, LP | History | No change | 285,515 | 2,957 | 0.02% | 0.03% | 29 | 0 | 0.0% | Q4 2025 | Feb 13, 2026 |
| Shaolin Capital Management LLC | History | Added to | 270,783 | 2,805 | 0.09% | 0.09% | 30 | +70,783 | 35.39% | Q4 2025 | Feb 17, 2026 |
| ARISTEIA CAPITAL, L.L.C. | History | No change | 250,000 | 2,590 | 0.06% | 0.06% | 31 | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| WHITEBOX ADVISORS LLC | History | No change | 250,000 | 2,590 | 0.04% | 0.04% | 32 | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| Verition Fund Management LLC | History | Reduced | 231,470 | 2,398 | 0.01% | 0.01% | 33 | -20,000 | -7.95% | Q4 2025 | Feb 13, 2026 |
| BERKLEY W R CORP | History | No change | 228,206 | 2,364 | 0.11% | 0.13% | 34 | 0 | 0.0% | Q4 2025 | Feb 13, 2026 |
| L1 Global Manager Pty Ltd | History | New | 200,000 | 2,072 | 1.36% | — | 37 | +200,000 | New | Q4 2025 | Feb 13, 2026 |
| DLD Asset Management, LP | History | Reduced | 200,000 | 2,072 | 0.15% | 0.11% | 36 | -25,000 | -11.11% | Q4 2025 | Feb 13, 2026 |
| OCONNOR, A Distinct Business Unit of UBS ASSET MANAGEMENT AMERICAS (LLC) | History | No change | 200,000 | 2,072 | 2.86% | 0.33% | 35 | 0 | 0.0% | Q4 2025 | Mar 04, 2026 |
| Schonfeld Strategic Advisors LLC | History | Reduced | 173,515 | 1,797 | 0.01% | 0.01% | 38 | -48,150 | -21.72% | Q4 2025 | Feb 17, 2026 |
| TORONTO DOMINION BANK | History | Added to | 150,002 | 1,554 | 0.0% | 0.0% | 39 | +1 | 0.0% | Q4 2025 | Feb 17, 2026 |
| READYSTATE ASSET MANAGEMENT LP | History | No change | 147,534 | 1,528 | 0.06% | 0.06% | 40 | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| MMCAP International Inc. SPC | History | No change | 125,000 | 1,295 | 0.13% | 0.15% | 41 | 0 | 0.0% | Q4 2025 | Feb 09, 2026 |
| JPMORGAN CHASE & CO | History | Reduced | 100,000 | 1,059 | 0.0% | 0.0% | 42 | -38,380 | -27.74% | Q4 2025 | Feb 11, 2026 |
| GRITSTONE ASSET MANAGEMENT LLC | History | No change | 99,081 | 1,026 | 0.98% | 1.04% | 43 | 0 | 0.0% | Q4 2025 | Jan 23, 2026 |
| K2 PRINCIPAL FUND, L.P. | History | Reduced | 87,900 | 910 | 0.07% | 0.09% | 44 | -25,770 | -22.67% | Q4 2025 | Feb 13, 2026 |
| Clear Street Group Inc. | History | Added to | 78,853 | 827 | 0.0% | 0.0% | 45 | +11,892 | 17.76% | Q4 2025 | Feb 13, 2026 |
| Baird Financial Group, Inc. | History | New | 78,500 | 813 | 0.0% | — | 46 | +78,500 | New | Q4 2025 | Feb 13, 2026 |
| CSS LLC/IL | History | Added to | 57,143 | 592 | 0.03% | 0.02% | 47 | +7,143 | 14.29% | Q4 2025 | Feb 17, 2026 |
| StoneX Group Inc. | History | New | 50,613 | 524 | 0.02% | — | 48 | +50,613 | New | Q4 2025 | Feb 12, 2026 |
| JANE STREET GROUP, LLC | History | Reduced | 46,060 | 487 | 0.0% | 0.0% | 49 | -11 | -0.02% | Q4 2025 | Feb 12, 2026 |
| Warberg Asset Management LLC | History | No change | 10,000 | 103 | 0.01% | 0.02% | 50 | 0 | 0.0% | Q4 2025 | Feb 13, 2026 |
| UBS Group AG | History | Added to | 4,136 | 43 | 0.0% | 0.0% | 51 | +6 | 0.15% | Q4 2025 | Jan 29, 2026 |
| MORGAN STANLEY | History | Added to | 130 | 1 | 0.0% | — | 52 | +79 | 154.9% | Q4 2025 | Feb 13, 2026 |