Siren LLC’s argenx ARGX Stock Holding History

Siren LLC’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
2025 Q1	–	Sell	-115,045	Closed	-$70.8M	–	118
2024 Q4	$70.8M	Sell	115,045 -28,602	-20%	-$16.8M	3.13%	6
2024 Q3	$77.9M	Buy	+143,647	New	+$72.6M	3.89%	5

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

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

Janus Henderson Group London, United Kingdom $209B AUM 37.72% 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

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return

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

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

Siren LLC's ARGX Position: Q1 2025 in Review

Siren LLC sold out of argenx (ARGX) in Q1 2025, closing a stake of 115,045 shares — an estimated $70.8M sold.

Siren LLC first reported a position in ARGX in Q3 2024 and held it in 2 quarters. The position peaked at $77.9M in Q3 2024. 447 funds tracked by Wall St. Rank hold ARGX as of Q1 2025.

Siren LLC reported no remaining argenx position as of Q1 2025 after selling out during the quarter.
Siren LLC sold 115,045 argenx shares in Q1 2025, an estimated $70.8M.
Siren LLC first reported a position in argenx in Q3 2024 and held it in 2 quarters.
Siren LLC's argenx position peaked at $77.9M in Q3 2024.
447 funds tracked by Wall St. Rank held argenx as of Q1 2025.

Based on Siren LLC's 13F filing for Q1 2025, filed 14 May 2025.