Westchester Capital Management and Virtus Acquire 5.65% Stake in Pioneer Acquisition I Corp

On May 15, 2026, Westchester Capital Management, LLC, filed a Schedule 13G reporting a new 5.65% stake in Pioneer Acquisition I Corp (PACH). The filing was made jointly with Westchester Capital Partners, LLC and Virtus Investment Advisers, LLC. Collectively, the reporting persons beneficially own 1,248,504 Class A ordinary shares. Individually, Westchester Capital Management reported 1,248,504 shares (5.65%), Virtus Investment Advisers reported 1,152,746 shares (5.21%), and Westchester Capital Partners reported 10,108 shares (0.05%). Virtus serves as the investment adviser to several funds, including The Merger Fund, while Westchester acts as the sub-advisor. The shares were acquired in the ordinary course of business and not for the purpose of influencing control over the issuer. The calculation of ownership is based on 22,114,799 shares outstanding as of March 26, 2026. This represents a significant new position for the group, having previously held no reported percentage in the issuer.