Pioneer Acquisition I Class APACH
13F holders, Q1 2026 (March 31)61holders +2
5new positions
3sold out
2famous investors
$10.15avg. 13F price*
At the end of Q1 2026, 61 institutions reported holding Pioneer Acquisition I Class A (PACH) in their 13F filings, up 2 from Q4 2025. 5 opened new positions and 3 sold out. The largest holders were Westchester Capital Management, LLC ($12.8M), D. E. Shaw & Co. ($12.7M) and Glazer Capital, LLC ($12.3M). 2 famous investors held it, including David E. Shaw (0.0% of D. E. Shaw & Co.'s portfolio) and Israel Englander (0.0% of Millennium Management's portfolio).
- Company
- Pioneer Acquisition I Class A
- CUSIP
- G7117W107
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q4 2025 → Q1 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 5 | $3.3M |
| Exits | 3 | $6.4M |
All 13F filers, Q4 2025 → Q1 2026: 1,624,939 shares bought and 1,076,301 shares sold, net +548,638 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 61 holders
| Westchester Capital Management, LLC | 0.62% | Add +208.0% | 1,258,612 | $12.8M |
| D. E. Shaw & Co. | 0.01% | No change | 1,252,350 | $12.7M |
| Glazer Capital, LLC | 0.27% | Add +15.2% | 1,210,643 | $12.3M |
| Magnetar Financial LLC | 0.11% | No change | 1,000,000 | $10.2M |
| Linden Advisors LP | 0.59% | No change | 1,000,000 | $10.2M |
| AQR Arbitrage LLC | 0.19% | Reduce -3.7% | 948,381 | $9.6M |
| Wealthspring Capital LLC | 2.06% | Reduce -1.0% | 841,508 | $8.5M |
| Two Sigma Investments, LP | 0.01% | No change | 797,500 | $8.1M |
| MMCAP International Inc. SPC | 0.66% | No change | 750,000 | $7.6M |
| Wolverine Asset Management LLC | 0.38% | Add +37.1% | 702,778 | $7.1M |
| Healthcare of Ontario Pension Plan Trust Fund | 0.01% | No change | 650,000 | $6.6M |
| Radcliffe Capital Management, L.P. | 0.72% | No change | 629,247 | $6.4M |
| TENOR CAPITAL MANAGEMENT Co., L.P. | 0.41% | No change | 600,000 | $6.1M |
| Verition Fund Management LLC | 0.06% | Reduce -3.4% | 525,558 | $5.3M |
| Karpus Management, Inc. | 0.16% | Add +4.3% | 501,988 | $5.1M |
| Alberta Investment Management Corp | 0.03% | No change | 500,000 | $5.1M |
| Jain Global LLC | 0.07% | Reduce 0.0% | 499,979 | $5.1M |
| Shaolin Capital Management LLC | 0.56% | No change | 500,000 | $5.1M |
| First Trust Capital Management L.P. | 0.27% | No change | 500,000 | $5.1M |
| Picton Mahoney Asset Management | 0.05% | No change | 500,000 | $5.1M |
| Mangrove Partners Im, LLC | 0.37% | No change | 450,000 | $4.6M |
| OMERS ADMINISTRATION Corp | 0.03% | No change | 440,000 | $4.5M |
| Commonwealth of Pennsylvania Public School Empls Retrmt SYS | 0.02% | No change | 400,000 | $4.1M |
| Mint Tower Capital Management B.V. | 0.88% | No change | 400,000 | $4.1M |
| Aristeia Capital, L.L.C. | 0.16% | No change | 400,000 | $4.1M |
| Polar Asset Management Partners Inc. | 0.13% | Reduce -20.0% | 400,000 | $4.1M |
| BNP Paribas Financial Markets | 0.00% | Add +13.0% | 348,493 | $3.5M |
| Periscope Capital Inc. | 0.55% | Reduce -25.0% | 300,000 | $3.0M |
| Whitebox Advisors LLC | 0.17% | No change | 300,000 | $3.0M |
| Millennium Management | 0.00% | Add +6.8% | 287,699 | $2.9M |
| O'Connor Alternative Investments LLC | 0.14% | — | 250,000 | $2.5M |
| Ghisallo Capital Management LLC | 0.07% | No change | 250,000 | $2.5M |
| Moore Capital Management, LP | 0.10% | No change | 250,000 | $2.5M |
| Rivernorth Capital Management, LLC | 0.13% | No change | 249,758 | $2.5M |
| Hudson Bay Capital Management LP | 0.02% | No change | 246,000 | $2.5M |
| CSS LLC | 0.34% | Reduce -0.7% | 210,988 | $2.1M |
| Toronto Dominion Bank | 0.00% | Add +16.5% | 168,875 | $1.7M |
| Context Capital Management, LLC | 0.41% | No change | 150,000 | $1.5M |
| TIG Advisors, LLC | 0.07% | No change | 150,000 | $1.5M |
| Clear Street Group Inc. | 0.01% | Reduce -53.1% | 149,456 | $1.5M |
| Berkley W R Corp. | 0.08% | No change | 148,726 | $1.5M |
| DLD Asset Management, LP | 0.39% | No change | 127,737 | $1.3M |
| Sona Asset Management (us) LLC | 0.06% | New | 111,059 | $1.1M |
| Lineage Point Capital LP | 0.27% | No change | 106,805 | $1.1M |
| Dakota Wealth Management | 0.02% | Reduce -4.5% | 104,100 | $1.1M |
| Heights Capital Management, Inc. | 0.29% | No change | 100,000 | $1.0M |
| Governors Lane LP | 0.13% | No change | 100,000 | $1.0M |
| Parallax Volatility Advisers, L.P. | 0.05% | New | 94,401 | $961K |
| Boothbay Fund Management, LLC | 0.02% | No change | 83,391 | $845K |
| Gritstone Asset Management LLC | 0.76% | No change | 69,324 | $702K |
| Timelo Investment Management Inc. | 0.83% | New | 60,000 | $608K |
| Centiva Capital, LP | 0.02% | No change | 50,000 | $508K |
| Kepos Capital LP | 0.80% | New | 47,100 | $478K |
| Stoic Point Capital Management LLC | 0.34% | No change | 33,775 | $342K |
| Abc Arbitrage SA | 0.03% | No change | 25,000 | $253K |
| L1 Global Manager Pty Ltd | 0.20% | No change | 24,400 | $247K |
| PenderFund Capital Management Ltd. | 0.07% | Reduce -12.6% | 15,200 | $154K |
| Deltec Asset Management LLC | 0.02% | No change | 10,000 | $101K |
| UBS Group AG | 0.00% | New | 9,060 | $92K |
| FNY Investment Advisers, LLC | 0.00% | No change | 1,000 | $10K |
| Morgan Stanley | 0.00% | Add +1.5% | 68 | $689 |
"% of holder's portfolio" is PACH's weight in each manager's 13F, not the share of Pioneer Acquisition I Class A the manager owns.