Pioneer Acquisition I Corp (NASDAQ:PACH) appears in 59 institutional 13F filings for the quarter ending December 2025.
| Owner Name | Date | Shares Held | Change (QoQ) | Change (%) | Value (USD) |
|---|---|---|---|---|---|
| Westchester Capital Management, LLC | 31 Mar, 2026 | 1,258,612 | 850,000 | 208.02% | $12,787,497.00 |
| D. E. Shaw & Co., Inc. | 31 Mar, 2026 | 1,252,350 | 560,668 | 81.06% | $12,598,641.00 |
| D. E. Shaw & Co., Inc. | 31 Mar, 2026 | 1,252,350 | 0 | 0.00% | $12,723,876.00 |
| GLAZER CAPITAL, LLC | 31 Mar, 2026 | 1,210,643 | 159,993 | 15.23% | $12,264.00 |
| GLAZER CAPITAL, LLC | 31 Mar, 2026 | 1,050,650 | 0 | 0.00% | $10,559.00 |
| Alberta Investment Management Corp | 31 Mar, 2026 | 1,000,000 | 1,000,000 | 0.00% | $10,060,000.00 |
| Magnetar Financial LLC | 31 Mar, 2026 | 1,000,000 | 1,000,000 | 0.00% | $10,060,000.00 |
| Magnetar Financial LLC | 31 Mar, 2026 | 1,000,000 | 0 | 0.00% | $10,190,000.00 |
| LINDEN ADVISORS LP | 31 Mar, 2026 | 1,000,000 | 0 | 0.00% | $10,060,000.00 |
| LINDEN ADVISORS LP | 31 Mar, 2026 | 1,000,000 | 0 | 0.00% | $10,160,000.00 |
| AQR Arbitrage LLC | 31 Mar, 2026 | 984,608 | 0 | 0.00% | $9,905,156.00 |
| AQR Arbitrage LLC | 31 Mar, 2026 | 948,381 | -36,227 | -3.68% | $9,635,551.00 |
| Wealthspring Capital LLC | 31 Mar, 2026 | 850,336 | -32,950 | -3.73% | $8,545,877.00 |
| Wealthspring Capital LLC | 31 Mar, 2026 | 841,508 | -8,828 | -1.04% | $8,524,476.00 |
| TWO SIGMA INVESTMENTS, LP | 31 Mar, 2026 | 797,500 | 0 | 0.00% | $8,078,675.00 |
| TWO SIGMA INVESTMENTS, LP | 31 Mar, 2026 | 797,500 | 0 | 0.00% | $8,014,875.00 |
| MMCAP International Inc. SPC | 31 Mar, 2026 | 750,000 | 750,000 | 0.00% | $7,537,500.00 |
| MMCAP International Inc. SPC | 31 Mar, 2026 | 750,000 | 0 | 0.00% | $7,597,500.00 |
| WOLVERINE ASSET MANAGEMENT LLC | 31 Mar, 2026 | 702,778 | 190,272 | 37.13% | $7,140,224.00 |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND | 31 Mar, 2026 | 650,000 | 0 | 0.00% | $6,539,000.00 |