UOC
PACH

UBS O'Connor’s Pioneer Acquisition I Corp PACH Stock Holding History

UBS O'Connor’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
2025
Q4 		$2.52M Hold
250,000
– – 0.07% 94
2025
Q3 		$2.48M Buy
+250,000
New +$2.49M 0.07% 123

Other funds holding PACH

D.E. Shaw & Co
D.E. Shaw & Co New York $210B AUM 57.28% 1-Year Est. Return
GCL
Glazer Capital LLC New York $4.07B AUM 78.71% 1-Year Est. Return
LA
Linden Advisors New York $19.3B AUM 1.47% 1-Year Est. Return
MF
Magnetar Financial Evanston, Illinois $11B AUM 3.37% 1-Year Est. Return
AA
AQR Arbitrage Greenwich, Connecticut $7.02B AUM 31.58% 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 $138B AUM 41.87% 1-Year Est. Return
MI
MMCAP International Grand Cayman, Cayman Islands $1.18B AUM 50.44% 1-Year Est. Return
Healthcare of Ontario Pension Plan (HOOPP) Trust Fund
Healthcare of Ontario Pension Plan (HOOPP) Trust Fund Toronto, Ontario, Canada $71.2B AUM 48.86% 1-Year Est. Return
RCM
Radcliffe Capital Management Bala Cynwyd, Pennsylvania $1.32B AUM 1.82% 1-Year Est. Return

UBS O'Connor's PACH Position: Q4 2025 in Review

UBS O'Connor held its Pioneer Acquisition I Corp (PACH) position steady in Q4 2025 at 250,000 shares worth $2.52M. The position accounts for 0.07% of the portfolio, ranked #94.

UBS O'Connor first reported a position in PACH in Q3 2025 and has held it in 2 quarters since. 59 funds tracked by Wall St. Rank hold PACH as of Q4 2025.

  • UBS O'Connor held 250,000 shares of Pioneer Acquisition I Corp worth $2.52M as of Q4 2025.
  • UBS O'Connor left its Pioneer Acquisition I Corp share count unchanged in Q4 2025.
  • Pioneer Acquisition I Corp made up 0.07% of UBS O'Connor's portfolio in Q4 2025, its #94 holding.
  • UBS O'Connor first reported a position in Pioneer Acquisition I Corp in Q3 2025 and has held it in 2 quarters since.
  • 59 funds tracked by Wall St. Rank held Pioneer Acquisition I Corp as of Q4 2025.

Based on UBS O'Connor's 13F filing for Q4 2025, filed 13 Feb 2026.