Pioneer Acquisition I Corp - PACH
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Westchester Capital Management, LLC | History | Added to | 1,258,612 | 12,738 | 0.54% | 0.42% | 1 | +344,000 | 37.61% | Q4 2025 | Feb 13, 2026 |
| D. E. Shaw & Co., Inc. | History | Added to | 1,252,350 | 12,598 | 0.01% | 0.0% | 2 | +560,668 | 81.06% | Q4 2025 | Feb 17, 2026 |
| GLAZER CAPITAL, LLC | History | No change | 1,050,650 | 10,559 | 0.28% | 0.35% | 3 | 0 | 0.0% | Q4 2025 | Feb 13, 2026 |
| LINDEN ADVISORS LP | History | No change | 1,000,000 | 10,060 | 0.06% | 0.07% | 4 | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| Magnetar Financial LLC | History | No change | 1,000,000 | 10,060 | 0.1% | 0.06% | 5 | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| AQR Arbitrage LLC | History | No change | 984,608 | 9,905 | 0.21% | 0.25% | 6 | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| Wealthspring Capital LLC | History | Reduced | 850,336 | 8,545 | 2.02% | 2.09% | 7 | -32,950 | -3.73% | Q4 2025 | Feb 05, 2026 |
| TWO SIGMA INVESTMENTS, LP | History | No change | 797,500 | 8,014 | 0.01% | 0.01% | 8 | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| LMR Partners LLP | History | No change | 750,000 | 7,665 | 0.01% | 0.03% | 9 | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| HGC Investment Management Inc. | History | No change | 743,077 | 7,594 | 1.61% | 1.82% | 10 | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| MMCAP International Inc. SPC | History | No change | 750,000 | 7,537 | 0.75% | 0.88% | 11 | 0 | 0.0% | Q4 2025 | Feb 09, 2026 |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND | History | No change | 650,000 | 6,539 | 0.01% | 0.01% | 12 | 0 | 0.0% | Q4 2025 | Feb 13, 2026 |
| Radcliffe Capital Management, L.P. | History | Added to | 629,247 | 6,323 | 0.34% | 0.37% | 13 | +36,772 | 6.21% | Q4 2025 | Feb 17, 2026 |
| TENOR CAPITAL MANAGEMENT Co., L.P. | History | No change | 600,000 | 6,030 | 0.08% | 0.08% | 14 | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| METEORA CAPITAL, LLC | History | New | 549,969 | 5,527 | 0.46% | — | 15 | +549,969 | New | Q4 2025 | Feb 17, 2026 |
| Verition Fund Management LLC | History | Reduced | 544,200 | 5,474 | 0.02% | 0.02% | 16 | -5,800 | -1.05% | Q4 2025 | Feb 13, 2026 |
| TORONTO DOMINION BANK | History | Reduced | 507,700 | 5,164 | 0.01% | 0.01% | 17 | -223,629 | -30.58% | Q4 2025 | Feb 17, 2026 |
| WOLVERINE ASSET MANAGEMENT LLC | History | Reduced | 512,506 | 5,150 | 0.04% | 0.05% | 18 | -164,703 | -24.32% | Q4 2025 | Feb 02, 2026 |
| Alberta Investment Management Corp | History | No change | 500,000 | 5,030 | 0.03% | 0.04% | 19 | 0 | 0.0% | Q4 2025 | Feb 19, 2026 |
| Jain Global LLC | History | No change | 500,000 | 5,030 | 0.02% | 0.02% | 20 | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| Polar Asset Management Partners Inc. | History | New | 500,000 | 5,025 | 0.06% | — | 21 | +500,000 | New | Q4 2025 | Feb 17, 2026 |
| Shaolin Capital Management LLC | History | Reduced | 500,000 | 5,025 | 0.16% | 0.3% | 24 | -200,000 | -28.57% | Q4 2025 | Feb 17, 2026 |
| PICTON MAHONEY ASSET MANAGEMENT | History | No change | 500,000 | 5,025 | 0.04% | 0.04% | 22 | 0 | 0.0% | Q4 2025 | Feb 11, 2026 |
| First Trust Capital Management L.P. | History | No change | 500,000 | 5,025 | 0.3% | 0.32% | 23 | 0 | 0.0% | Q4 2025 | Feb 13, 2026 |
| Karpus Management, Inc. | History | Added to | 481,088 | 4,834 | 0.15% | 0.05% | 25 | +321,088 | 200.68% | Q4 2025 | Feb 17, 2026 |
| MANGROVE PARTNERS IM, LLC | History | No change | 450,000 | 4,522 | 0.37% | 0.33% | 26 | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| OMERS ADMINISTRATION Corp | History | No change | 440,000 | 4,426 | 0.03% | 0.03% | 27 | 0 | 0.0% | Q4 2025 | Feb 13, 2026 |
| PERISCOPE CAPITAL INC. | History | Reduced | 400,000 | 4,020 | 0.46% | 0.75% | 31 | -75,000 | -15.79% | Q4 2025 | Feb 10, 2026 |
| ARISTEIA CAPITAL, L.L.C. | History | No change | 400,000 | 4,020 | 0.09% | 0.09% | 28 | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS | History | No change | 400,000 | 4,020 | 0.02% | 0.02% | 29 | 0 | 0.0% | Q4 2025 | Feb 10, 2026 |
| Mint Tower Capital Management B.V. | History | No change | 400,000 | 4,020 | 0.46% | 0.48% | 30 | 0 | 0.0% | Q4 2025 | Feb 12, 2026 |
| Clear Street Group Inc. | History | Reduced | 332,605 | 3,345 | 0.01% | 0.02% | 32 | -390,688 | -54.02% | Q4 2025 | Feb 13, 2026 |
| BNP PARIBAS FINANCIAL MARKETS | History | No change | 308,414 | 3,102 | 0.0% | 0.0% | 33 | 0 | 0.0% | Q4 2025 | Feb 10, 2026 |
| WHITEBOX ADVISORS LLC | History | No change | 300,000 | 3,015 | 0.04% | 0.05% | 34 | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| MILLENNIUM MANAGEMENT LLC | History | Reduced | 269,500 | 2,708 | 0.0% | 0.0% | 35 | -15,501 | -5.44% | Q4 2025 | Feb 17, 2026 |
| OCONNOR, A Distinct Business Unit of UBS ASSET MANAGEMENT AMERICAS (LLC) | History | No change | 250,000 | 2,515 | 3.48% | 0.4% | 36 | 0 | 0.0% | Q4 2025 | Mar 04, 2026 |
| Ghisallo Capital Management LLC | History | No change | 250,000 | 2,515 | 0.11% | 0.08% | 37 | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| MOORE CAPITAL MANAGEMENT, LP | History | No change | 250,000 | 2,512 | 0.04% | 0.03% | 38 | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| RIVERNORTH CAPITAL MANAGEMENT, LLC | History | Reduced | 249,758 | 2,510 | 0.12% | 0.14% | 39 | -4 | -0.0% | Q4 2025 | Feb 17, 2026 |
| Hudson Bay Capital Management LP | History | No change | 246,000 | 2,474 | 0.01% | 0.01% | 40 | 0 | 0.0% | Q4 2025 | Feb 13, 2026 |
| CSS LLC/IL | History | No change | 212,388 | 2,134 | 0.09% | 0.09% | 41 | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| Lineage Point Capital LP | History | New | 157,672 | 1,594 | 0.6% | — | 42 | +157,672 | New | Q4 2025 | Feb 26, 2026 |
| Context Capital Management, LLC | History | No change | 150,000 | 1,507 | 0.04% | 0.05% | 43 | 0 | 0.0% | Q4 2025 | Feb 13, 2026 |
| TIG Advisors, LLC | History | No change | 150,000 | 1,507 | 0.07% | 0.09% | 44 | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| BERKLEY W R CORP | History | No change | 148,726 | 1,494 | 0.07% | 0.09% | 45 | 0 | 0.0% | Q4 2025 | Feb 13, 2026 |
| DLD Asset Management, LP | History | Added to | 127,737 | 1,283 | 0.09% | 0.07% | 46 | +27,738 | 27.74% | Q4 2025 | Feb 13, 2026 |
| SYQUANT CAPITAL SAS | History | No change | 110,000 | 1,124 | 0.14% | 0.32% | 47 | 0 | 0.0% | Q4 2025 | Jan 13, 2026 |
| Dakota Wealth Management | History | No change | 109,000 | 1,095 | 0.02% | 0.02% | 48 | 0 | 0.0% | Q4 2025 | Jan 13, 2026 |
| JPMORGAN CHASE & CO | History | No change | 100,000 | 1,022 | 0.0% | 0.0% | 49 | 0 | 0.0% | Q4 2025 | Feb 11, 2026 |
| HEIGHTS CAPITAL MANAGEMENT, INC | History | No change | 100,000 | 1,006 | 0.36% | 0.29% | 50 | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| Governors Lane LP | History | No change | 100,000 | 1,005 | 0.06% | 0.08% | 51 | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| BOOTHBAY FUND MANAGEMENT, LLC | History | No change | 83,391 | 838 | 0.01% | 0.01% | 52 | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| GRITSTONE ASSET MANAGEMENT LLC | History | No change | 69,324 | 696 | 0.66% | 0.71% | 53 | 0 | 0.0% | Q4 2025 | Jan 23, 2026 |
| Timelo Investment Management Inc. | History | No change | 60,000 | 613 | 0.22% | 0.23% | 54 | 0 | 0.0% | Q4 2025 | Feb 13, 2026 |
| MIZUHO SECURITIES USA LLC | History | Reduced | 50,924 | 513 | 0.01% | 0.06% | 55 | -250,378 | -83.1% | Q4 2025 | Feb 09, 2026 |
| Centiva Capital, LP | History | No change | 50,000 | 503 | 0.0% | 0.0% | 56 | 0 | 0.0% | Q4 2025 | Feb 13, 2026 |
| Virtu Financial LLC | History | Reduced | 34,201 | 344 | 0.01% | 0.14% | 57 | -226,925 | -86.9% | Q4 2025 | Feb 23, 2026 |
| Stoic Point Capital Management LLC | History | New | 33,775 | 339 | 0.29% | — | 58 | +33,775 | New | Q4 2025 | Feb 17, 2026 |
| READYSTATE ASSET MANAGEMENT LP | History | No change | 31,492 | 321 | 0.01% | 0.01% | 59 | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| HRT FINANCIAL LP | History | Reduced | 25,000 | 255 | 0.0% | 0.0% | 60 | -8,158 | -24.6% | Q4 2025 | Feb 12, 2026 |
| Yakira Capital Management, Inc. | History | No change | 25,000 | 255 | 0.09% | 0.09% | 61 | 0 | 0.0% | Q4 2025 | Feb 13, 2026 |
| ABC ARBITRAGE SA | History | New | 25,000 | 251 | 0.02% | — | 62 | +25,000 | New | Q4 2025 | Feb 04, 2026 |
| L1 Global Manager Pty Ltd | History | New | 24,400 | 245 | 0.16% | — | 63 | +24,400 | New | Q4 2025 | Feb 13, 2026 |
| Rangeley Capital, LLC | History | Reduced | 22,145 | 226 | 0.19% | 0.19% | 64 | -12 | -0.05% | Q4 2025 | Feb 17, 2026 |
| PenderFund Capital Management Ltd. | History | No change | 17,400 | 175 | 0.03% | 0.03% | 65 | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| DELTEC ASSET MANAGEMENT LLC | History | No change | 10,000 | 100 | 0.02% | 0.02% | 66 | 0 | 0.0% | Q4 2025 | Jan 29, 2026 |
| FNY Investment Advisers, LLC | History | New | 1,000 | 10 | 0.0% | — | 67 | +1,000 | New | Q4 2025 | Jan 16, 2026 |
| LONGFELLOW INVESTMENT MANAGEMENT CO LLC | History | No change | 500 | 5 | 0.0% | 0.0% | 68 | 0 | 0.0% | Q4 2025 | Feb 11, 2026 |
| Alpine Global Management, LLC | History | Closed out | 0 | 0 | — | 0.46% | — | -225,000 | -100.0% | Q3 2025 | Nov 21, 2025 |
| StoneX Group Inc. | History | Closed out | 0 | 0 | — | 0.07% | — | -155,000 | -100.0% | Q3 2025 | Nov 14, 2025 |
| Parallax Volatility Advisers, L.P. | History | Closed out | 0 | 0 | — | 0.0% | — | -58,744 | -100.0% | Q3 2025 | Nov 14, 2025 |
| CANTOR FITZGERALD, L. P. | History | Closed out | 0 | 0 | — | 0.0% | — | -36,894 | -100.0% | Q3 2025 | Feb 17, 2026 |
| UBS Group AG | History | Reduced | 10 | 0 | — | 0.0% | — | -540 | -98.18% | Q4 2025 | Jan 29, 2026 |
| MORGAN STANLEY | History | New | 67 | 0 | — | — | — | +67 | New | Q4 2025 | Feb 13, 2026 |