Who Owns PIONEER ACQUISITION I CORP (PACH)? -- Institutional Holders (2026-06-30)
68 institutions reported holding $230.1M of PIONEER ACQUISITION I CORP (PACH) in SEC 13F filings for 2026-06-30. Largest institutional holders: Westchester Capital Management, LLC ($12.9M), D. E. Shaw & Co., Inc. ($12.8M), GLAZER CAPITAL, LLC ($12.4M), Linden Advisors LP ($10.2M), Magnetar Financial LLC ($10.2M). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|
| 1 | Westchester Capital Management, LLC | $12.9M | 1.3M | Hold |
| 2 | D. E. Shaw & Co., Inc. | $12.8M | 1.3M | Hold |
| 3 | GLAZER CAPITAL, LLC | $12.4M | 1.2M | Hold |
| 4 | Linden Advisors LP | $10.2M | 1.0M | Hold |
| 5 | Magnetar Financial LLC | $10.2M | 1.0M | Hold |
| 6 | AQR Arbitrage LLC | $9.8M | 956,895 | Added |
| 7 | TWO SIGMA INVESTMENTS, LP | $8.2M | 797,500 | Hold |
| 8 | WOLVERINE ASSET MANAGEMENT LLC | $8.1M | 788,462 | Added |
| 9 | Wealthspring Capital LLC | $7.9M | 776,258 | Trimmed |
| 10 | MMCAP International Inc. SPC | $7.7M | 750,000 | Hold |
| 11 | Radcliffe Capital Management, L.P. | $6.4M | 629,549 | Added |
| 12 | TENOR CAPITAL MANAGEMENT Co., L.P. | $6.1M | 600,000 | Hold |
| 13 | Karpus Management, Inc. | $5.6M | 551,988 | Added |
| 14 | Verition Fund Management LLC | $5.4M | 525,558 | Hold |
| 15 | PICTON MAHONEY ASSET MANAGEMENT | $5.1M | 500,000 | Hold |
| 16 | First Trust Capital Management L.P. | $5.1M | 500,000 | Hold |
| 17 | Alberta Investment Management Corp | $5.1M | 500,000 | Hold |
| 18 | MANGROVE PARTNERS IM, LLC | $4.6M | 450,000 | Hold |
| 19 | HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND | $4.6M | 450,000 | Trimmed |
| 20 | OMERS ADMINISTRATION Corp | $4.5M | 440,000 | Hold |
| 21 | COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS | $4.1M | 400,000 | Hold |
| 22 | Mint Tower Capital Management B.V. | $4.1M | 400,000 | Hold |
| 23 | Polar Asset Management Partners Inc. | $4.1M | 400,000 | Hold |
| 24 | ARISTEIA CAPITAL, L.L.C. | $4.1M | 400,000 | Hold |
| 25 | Jain Global LLC | $3.9M | 386,736 | Trimmed |
Source: SEC Form 13F filings · as of 2026-06-30