Pioneer Acquisition I PACH Institutional Ownership

Ownership Summary

Pioneer Acquisition I Corp (NASDAQ:PACH) appears in 61 institutional 13F filings for the quarter ending March 2026.

• These investors collectively held 88.1% of Pioneer Acquisition I's outstanding shares in March 2026, down from 165.3% in December 2025.
• They increased total shares held in Pioneer Acquisition I by 3.85% from the prior quarter, while the number of investors in PACH stayed flat year over year.
• Activity in PACH broke down as 14 buyers, 12 sellers, and 35 unchanged among 61 total holders.
• In total, institutional investors held 22.29Mn shares in Pioneer Acquisition I as of March 2026, up by 826.93K shares quarter on quarter, and with no net change year over year.
• As of March 31, 2026, the biggest holder of Pioneer Acquisition I is Westchester Capital Management, LLC at 1.26Mn shares, representing 4.97% of shares outstanding.
• Top purchasers of PACH stock for the quarter ending March 2026 included Westchester Capital Management, LLC (850.0K), O'Connor Alternative Investments LLC (250.0K), WOLVERINE ASSET MANAGEMENT LLC (190.27K), GLAZER CAPITAL, LLC (159.99K), SONA ASSET MANAGEMENT (US) LLC (111.06K).
• Leading sellers of Pioneer Acquisition I shares for the quarter ending March 2026 were Alberta Investment Management Corp (500.0K), Clear Street Group Inc. (168.99K), Lineage Point Capital LP (106.8K), Polar Asset Management Partners Inc. (100.0K), PERISCOPE CAPITAL INC. (100.0K).
• Per Business Quant data, the top 10 holders of Pioneer Acquisition I for the quarter ending March 2026 are Westchester Capital Management, LLC (1.26Mn), D. E. Shaw & Co., Inc. (1.25Mn), GLAZER CAPITAL, LLC (1.21Mn), LINDEN ADVISORS LP (1.0Mn), Magnetar Financial LLC (1.0Mn), AQR Arbitrage LLC (948.38K), Wealthspring Capital LLC (841.51K), TWO SIGMA INVESTMENTS, LP (797.5K), MMCAP International Inc. SPC (750.0K), WOLVERINE ASSET MANAGEMENT LLC (702.78K).