UOC
AACB

UBS O'Connor’s Artius II Acquisition Inc AACB Stock Holding History

UBS O'Connor’s Portfolio AACB Stock Details AACB Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2025
Q4 		$1.65M Hold
160,000
– – 0.04% 117
2025
Q3 		$1.62M Hold
160,000
– – 0.05% 151
2025
Q2 		$1.62M Buy
+160,000
New +$1.6M 0.04% 174

Other funds holding AACB

HIM
HGC Investment Management Toronto, Ontario, Canada $507M AUM 6.15% 1-Year Est. Return
AA
AQR Arbitrage Greenwich, Connecticut $7.02B AUM 31.58% 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
WCMNY
Westchester Capital Management (New York) Valhalla, New York $2.04B AUM 31.03% 1-Year Est. Return
AIMCA
Alberta Investment Management Corp (AIMCo) Edmonton, Alberta, Canada $17.9B AUM 27.56% 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
PAMP
Polar Asset Management Partners Toronto, Ontario, Canada $6.07B AUM 34.81% 1-Year Est. Return
PMAM
Picton Mahoney Asset Management Toronto, Ontario, Canada $13.5B AUM 51.46% 1-Year Est. Return
Two Sigma Investments
Two Sigma Investments New York $138B AUM 41.87% 1-Year Est. Return

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

UBS O'Connor held its Artius II Acquisition Inc (AACB) position steady in Q4 2025 at 160,000 shares worth $1.65M. The position accounts for 0.04% of the portfolio, ranked #117.

UBS O'Connor first reported a position in AACB in Q2 2025 and has held it in 3 quarters since. 47 funds tracked by Wall St. Rank hold AACB as of Q4 2025.

  • UBS O'Connor held 160,000 shares of Artius II Acquisition Inc worth $1.65M as of Q4 2025.
  • UBS O'Connor left its Artius II Acquisition Inc share count unchanged in Q4 2025.
  • Artius II Acquisition Inc made up 0.04% of UBS O'Connor's portfolio in Q4 2025, its #117 holding.
  • UBS O'Connor first reported a position in Artius II Acquisition Inc in Q2 2025 and has held it in 3 quarters since.
  • 47 funds tracked by Wall St. Rank held Artius II Acquisition Inc as of Q4 2025.

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