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 | 15,615 | 0.24% | 0.22% | 1 | 0 | 0.0% | Q1 2026 | May 15, 2026 |
| Magnetar Financial LLC | History | No change | 1,300,000 | 13,565 | 0.14% | 0.13% | 2 | 0 | 0.0% | Q1 2026 | May 13, 2026 |
| D. E. Shaw & Co., Inc. | History | No change | 1,138,500 | 11,897 | 0.01% | 0.01% | 3 | 0 | 0.0% | Q1 2026 | May 15, 2026 |
| LINDEN ADVISORS LP | History | No change | 1,000,000 | 10,435 | 0.06% | 0.06% | 4 | 0 | 0.0% | Q1 2026 | May 15, 2026 |
| AQR Arbitrage LLC | History | Reduced | 920,672 | 9,584 | 0.16% | 0.21% | 5 | -43,710 | -4.53% | Q1 2026 | May 15, 2026 |
| Westchester Capital Management, LLC | History | No change | 907,144 | 9,443 | 0.43% | 0.39% | 6 | 0 | 0.0% | Q1 2026 | May 15, 2026 |
| LMR Partners LLP | History | No change | 850,000 | 8,848 | 0.02% | 0.02% | 7 | 0 | 0.0% | Q1 2026 | May 15, 2026 |
| Ghisallo Capital Management LLC | History | No change | 800,000 | 8,348 | 0.23% | 0.37% | 8 | 0 | 0.0% | Q1 2026 | May 15, 2026 |
| Governors Lane LP | History | Added to | 759,556 | 7,925 | 0.51% | 0.47% | 9 | +939 | 0.12% | Q1 2026 | May 15, 2026 |
| Alberta Investment Management Corp | History | No change | 750,000 | 7,837 | 0.05% | 0.05% | 10 | 0 | 0.0% | Q1 2026 | Apr 28, 2026 |
| GLAZER CAPITAL, LLC | History | Reduced | 750,001 | 7,808 | 0.17% | 0.24% | 11 | -114,302 | -13.22% | Q1 2026 | May 14, 2026 |
| TWO SIGMA INVESTMENTS, LP | History | No change | 725,000 | 7,547 | 0.01% | 0.01% | 12 | 0 | 0.0% | Q1 2026 | May 15, 2026 |
| Hudson Bay Capital Management LP | History | No change | 700,000 | 7,315 | 0.03% | 0.02% | 13 | 0 | 0.0% | Q1 2026 | May 13, 2026 |
| Radcliffe Capital Management, L.P. | History | Added to | 661,337 | 6,901 | 0.52% | 0.37% | 14 | +3,015 | 0.46% | Q1 2026 | May 15, 2026 |
| TORONTO DOMINION BANK | History | Added to | 650,000 | 6,766 | 0.01% | 0.0% | 15 | +499,998 | 333.33% | Q1 2026 | May 15, 2026 |
| Sculptor Capital LP | History | No change | 600,646 | 6,252 | 0.07% | 0.06% | 16 | 0 | 0.0% | Q1 2026 | May 15, 2026 |
| Jain Global LLC | History | No change | 500,000 | 5,217 | 0.02% | 0.03% | 17 | 0 | 0.0% | Q1 2026 | May 15, 2026 |
| PICTON MAHONEY ASSET MANAGEMENT | History | No change | 500,000 | 5,205 | 0.04% | 0.04% | 18 | 0 | 0.0% | Q1 2026 | May 13, 2026 |
| MOORE CAPITAL MANAGEMENT, LP | History | No change | 450,000 | 4,684 | 0.1% | 0.07% | 19 | 0 | 0.0% | Q1 2026 | May 15, 2026 |
| RIVERNORTH CAPITAL MANAGEMENT, LLC | History | Reduced | 427,500 | 4,450 | 0.22% | 0.22% | 20 | -20,250 | -4.52% | Q1 2026 | May 15, 2026 |
| RLH Capital LLC | History | New | 400,907 | 4,183 | 2.13% | — | 21 | +400,907 | New | Q1 2026 | Apr 28, 2026 |
| COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS | History | No change | 400,000 | 4,174 | 0.02% | 0.02% | 22 | 0 | 0.0% | Q1 2026 | May 01, 2026 |
| J. Goldman & Co LP | History | New | 369,778 | 3,849 | 0.11% | — | 23 | +369,778 | New | Q1 2026 | May 15, 2026 |
| PERISCOPE CAPITAL INC. | History | Reduced | 352,880 | 3,682 | 0.41% | 0.53% | 24 | -95,220 | -21.25% | Q1 2026 | May 13, 2026 |
| GOLDMAN SACHS GROUP INC | History | Added to | 327,450 | 3,408 | 0.0% | 0.0% | 25 | +3,596 | 1.11% | Q1 2026 | May 15, 2026 |
| MILLENNIUM MANAGEMENT LLC | History | No change | 307,985 | 3,206 | 0.0% | 0.0% | 26 | 0 | 0.0% | Q1 2026 | May 15, 2026 |
| Mint Tower Capital Management B.V. | History | No change | 300,000 | 3,123 | 0.28% | 0.36% | 27 | 0 | 0.0% | Q1 2026 | May 04, 2026 |
| METEORA CAPITAL, LLC | History | Reduced | 295,612 | 3,077 | 0.23% | 0.62% | 28 | -422,821 | -58.85% | Q1 2026 | May 15, 2026 |
| Centiva Capital, LP | History | No change | 285,515 | 2,983 | 0.02% | 0.02% | 29 | 0 | 0.0% | Q1 2026 | May 14, 2026 |
| Quarry LP | History | New | 285,000 | 2,973 | 0.53% | — | 30 | +285,000 | New | Q1 2026 | May 15, 2026 |
| Shaolin Capital Management LLC | History | No change | 270,783 | 2,818 | 0.1% | 0.09% | 31 | 0 | 0.0% | Q1 2026 | May 15, 2026 |
| ARISTEIA CAPITAL, L.L.C. | History | No change | 250,000 | 2,602 | 0.05% | 0.06% | 32 | 0 | 0.0% | Q1 2026 | May 15, 2026 |
| WHITEBOX ADVISORS LLC | History | No change | 250,000 | 2,602 | 0.03% | 0.04% | 33 | 0 | 0.0% | Q1 2026 | May 15, 2026 |
| Verition Fund Management LLC | History | No change | 231,470 | 2,418 | 0.02% | 0.01% | 34 | 0 | 0.0% | Q1 2026 | May 15, 2026 |
| BERKLEY W R CORP | History | Reduced | 208,065 | 2,171 | 0.12% | 0.11% | 35 | -20,141 | -8.83% | Q1 2026 | May 15, 2026 |
| O'Connor Alternative Investments LLC | History | New | 200,000 | 2,087 | 0.18% | — | 36 | +200,000 | New | Q1 2026 | May 15, 2026 |
| L1 Global Manager Pty Ltd | History | No change | 200,000 | 2,082 | 1.39% | 1.36% | 37 | 0 | 0.0% | Q1 2026 | May 14, 2026 |
| OCONNOR, A Distinct Business Unit of UBS ASSET MANAGEMENT AMERICAS (LLC) | History | No change | 200,000 | 2,072 | 0.24% | 0.24% | 38 | 0 | 0.0% | Q4 2025 | Feb 13, 2026 |
| Schonfeld Strategic Advisors LLC | History | No change | 173,515 | 1,810 | 0.01% | 0.01% | 39 | 0 | 0.0% | Q1 2026 | May 15, 2026 |
| DLD Asset Management, LP | History | Reduced | 150,000 | 1,561 | 0.14% | 0.15% | 40 | -50,000 | -25.0% | Q1 2026 | May 13, 2026 |
| READYSTATE ASSET MANAGEMENT LP | History | Added to | 148,734 | 1,554 | 0.07% | 0.06% | 41 | +1,200 | 0.81% | Q1 2026 | May 15, 2026 |
| WOLVERINE ASSET MANAGEMENT LLC | History | Reduced | 134,280 | 1,397 | 0.01% | 0.03% | 42 | -221,074 | -62.21% | Q1 2026 | May 04, 2026 |
| MMCAP International Inc. SPC | History | No change | 125,000 | 1,301 | 0.11% | 0.13% | 43 | 0 | 0.0% | Q1 2026 | May 15, 2026 |
| GRITSTONE ASSET MANAGEMENT LLC | History | No change | 99,081 | 1,031 | 1.1% | 0.98% | 44 | 0 | 0.0% | Q1 2026 | May 05, 2026 |
| Lineage Point Capital LP | History | New | 95,895 | 1,000 | 0.24% | — | 45 | +95,895 | New | Q1 2026 | May 15, 2026 |
| Clear Street Group Inc. | History | Added to | 87,452 | 915 | 0.0% | 0.0% | 47 | +8,599 | 10.91% | Q1 2026 | May 15, 2026 |
| K2 PRINCIPAL FUND, L.P. | History | No change | 87,900 | 915 | 0.06% | 0.07% | 46 | 0 | 0.0% | Q1 2026 | May 14, 2026 |
| Baird Financial Group, Inc. | History | No change | 78,500 | 819 | 0.0% | 0.0% | 48 | 0 | 0.0% | Q1 2026 | May 14, 2026 |
| CSS LLC/IL | History | No change | 57,143 | 594 | 0.03% | 0.03% | 49 | 0 | 0.0% | Q1 2026 | May 15, 2026 |
| Virtu Financial LLC | History | New | 53,686 | 561 | 0.02% | — | 50 | +53,686 | New | Q1 2026 | May 14, 2026 |
| JPMORGAN CHASE & CO | History | Reduced | 50,000 | 545 | 0.0% | 0.0% | 51 | -50,000 | -50.0% | Q1 2026 | May 13, 2026 |
| JANE STREET GROUP, LLC | History | No change | 46,060 | 502 | 0.0% | 0.0% | 52 | 0 | 0.0% | Q1 2026 | May 12, 2026 |
| BNP PARIBAS FINANCIAL MARKETS | History | New | 37,744 | 392 | 0.0% | — | 53 | +37,744 | New | Q1 2026 | May 12, 2026 |
| MIZUHO SECURITIES USA LLC | History | Reduced | 19,469 | 202 | 0.0% | 0.05% | 54 | -284,358 | -93.59% | Q1 2026 | May 11, 2026 |
| GEODE CAPITAL MANAGEMENT, LLC | History | New | 11,102 | 115 | 0.0% | — | 55 | +11,102 | New | Q1 2026 | May 15, 2026 |
| CITADEL ADVISORS LLC | History | New | 10,377 | 108 | 0.0% | — | 56 | +10,377 | New | Q1 2026 | May 15, 2026 |
| UBS Group AG | History | Reduced | 2,327 | 24 | 0.0% | 0.0% | 57 | -1,809 | -43.74% | Q1 2026 | May 05, 2026 |
| DRIEHAUS CAPITAL MANAGEMENT LLC | History | Closed out | 0 | 0 | — | 0.04% | — | -573,083 | -100.0% | Q1 2026 | May 15, 2026 |
| StoneX Group Inc. | History | Closed out | 0 | 0 | — | 0.02% | — | -50,613 | -100.0% | Q1 2026 | May 14, 2026 |
| Warberg Asset Management LLC | History | Closed out | 0 | 0 | — | 0.01% | — | -10,000 | -100.0% | Q1 2026 | May 07, 2026 |
| MORGAN STANLEY | History | Reduced | 62 | 0 | — | 0.0% | — | -68 | -52.31% | Q1 2026 | May 15, 2026 |