WCMNY
PACH

Westchester Capital Management (New York)’s Pioneer Acquisition I Corp PACH Stock Holding History

Westchester Capital Management (New York)’s Portfolio PACH Stock Details PACH Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$12.8M Buy
1,258,612
+850,000
+208% +$8.59M 0.58% 31
2025
Q4 		$4.11M Buy
408,612
+344,000
+532% +$3.46M 0.17% 101
2025
Q3 		$642K Buy
+64,612
New +$643K 0.03% 181

Other funds holding PACH

D.E. Shaw & Co
D.E. Shaw & Co New York $166B AUM 43.98% 1-Year Est. Return
GCL
Glazer Capital LLC New York $4.71B AUM 81.93% 1-Year Est. Return
MF
Magnetar Financial Evanston, Illinois $9.84B AUM 190.64% 1-Year Est. Return
LA
Linden Advisors New York $17.9B AUM 1.72% 1-Year Est. Return
AA
AQR Arbitrage Greenwich, Connecticut $6.09B AUM 27.01% 1-Year Est. Return
WC
Wealthspring Capital West Harrison, New York $448M AUM 8.38% 1-Year Est. Return
Two Sigma Investments
Two Sigma Investments New York $124B AUM 33.93% 1-Year Est. Return
MI
MMCAP International Grand Cayman, Cayman Islands $1.16B AUM 77.9% 1-Year Est. Return
WAM
Wolverine Asset Management Chicago, Illinois $10.4B AUM 4.78% 1-Year Est. Return
Healthcare of Ontario Pension Plan (HOOPP) Trust Fund
Healthcare of Ontario Pension Plan (HOOPP) Trust Fund Toronto, Ontario, Canada $62.2B AUM 31.35% 1-Year Est. Return

Westchester Capital Management (New York)'s PACH Position: Q1 2026 in Review

Westchester Capital Management (New York) increased its Pioneer Acquisition I Corp (PACH) stake by 208% in Q1 2026, buying an estimated $8.59M and bringing the position to 1,258,612 shares worth $12.8M. The position accounts for 0.58% of the portfolio, ranked #31.

Westchester Capital Management (New York) first reported a position in PACH in Q3 2025 and has held it in 3 quarters since. 61 funds tracked by Wall St. Rank hold PACH as of Q1 2026.

  • Westchester Capital Management (New York) held 1,258,612 shares of Pioneer Acquisition I Corp worth $12.8M as of Q1 2026.
  • Westchester Capital Management (New York) bought 850,000 Pioneer Acquisition I Corp shares in Q1 2026, an estimated $8.59M.
  • Pioneer Acquisition I Corp made up 0.58% of Westchester Capital Management (New York)'s portfolio in Q1 2026, its #31 holding.
  • Westchester Capital Management (New York) first reported a position in Pioneer Acquisition I Corp in Q3 2025 and has held it in 3 quarters since.
  • 61 funds tracked by Wall St. Rank held Pioneer Acquisition I Corp as of Q1 2026.

Based on Westchester Capital Management (New York)'s 13F filing for Q1 2026, filed 15 May 2026.