UBS O'Connor’s argenx ARGX Stock Holding History

UBS O'Connor’s Portfolio ARGX Stock Details ARGX Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2024 Q1	–	Sell	-12,000	Closed	-$135K	–	522
2023 Q4	$135K	Buy	+12,000	New	+$5.59M	﹤0.01%	405

Other funds holding ARGX

Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

T. Rowe Price Associates Baltimore, Maryland $865B AUM 30.76% 1-Year Est. Return

Janus Henderson Group London, United Kingdom $209B AUM 37.72% 1-Year Est. Return

Artisan Partners Milwaukee, Wisconsin $62.3B AUM 26.25% 1-Year Est. Return

Capital World Investors Los Angeles, California $733B AUM 35.63% 1-Year Est. Return

ACA

Avoro Capital Advisors New York $10.2B AUM 149.19% 1-Year Est. Return

ClearBridge Investments New York $115B AUM 24.78% 1-Year Est. Return

Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return

Citadel Advisors Miami, Florida $618B AUM 30.34% 1-Year Est. Return

RTW Investments New York $10B AUM 135.35% 1-Year Est. Return

UBS O'Connor's ARGX Position: Q3 2025 in Review

UBS O'Connor sold out of argenx (ARGX) in Q3 2025, closing a stake of 2,191 shares — an estimated $1.21M sold.

UBS O'Connor first reported a position in ARGX in Q3 2024 and held it in 3 quarters. The position peaked at $1.21M in Q2 2025. 469 funds tracked by Wall St. Rank hold ARGX as of Q3 2025.

UBS O'Connor reported no remaining argenx position as of Q3 2025 after selling out during the quarter.
UBS O'Connor sold 2,191 argenx shares in Q3 2025, an estimated $1.21M.
UBS O'Connor first reported a position in argenx in Q3 2024 and held it in 3 quarters.
UBS O'Connor's argenx position peaked at $1.21M in Q2 2025.
469 funds tracked by Wall St. Rank held argenx as of Q3 2025.

Based on UBS O'Connor's 13F filing for Q3 2025, filed 14 Nov 2025.