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Ardsley Advisory Partners’s argenx ARGX Stock Holding History

Ardsley Advisory Partners’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
2026
Q1 		– Sell
-24,000
Closed -$20.2M – 158
2025
Q4 		$20.2M Buy
24,000
+9,000
+60% +$7.7M 2.22% 7
2025
Q3 		$11.1M Buy
+15,000
New +$9.89M 1.37% 23

Other funds holding ARGX

Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $999B AUM 46.22% 1-Year Est. Return
Janus Henderson Group
Janus Henderson Group London $209B AUM 37.72% 1-Year Est. Return
Capital World Investors
Capital World Investors Los Angeles, California $846B AUM 46.74% 1-Year Est. Return
Artisan Partners
Artisan Partners Milwaukee, Wisconsin $63.1B AUM 35.51% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $580B AUM 38.23% 1-Year Est. Return
ACA
Avoro Capital Advisors New York $11.1B AUM 207.82% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
RI
RTW Investments New York $11.7B AUM 174.13% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return

Ardsley Advisory Partners's ARGX Position: Q1 2026 in Review

Ardsley Advisory Partners sold out of argenx (ARGX) in Q1 2026, closing a stake of 24,000 shares — an estimated $20.2M sold.

Ardsley Advisory Partners first reported a position in ARGX in Q3 2025 and held it in 2 quarters. The position peaked at $20.2M in Q4 2025. 477 funds tracked by Wall St. Rank hold ARGX as of Q1 2026.

  • Ardsley Advisory Partners reported no remaining argenx position as of Q1 2026 after selling out during the quarter.
  • Ardsley Advisory Partners sold 24,000 argenx shares in Q1 2026, an estimated $20.2M.
  • Ardsley Advisory Partners first reported a position in argenx in Q3 2025 and held it in 2 quarters.
  • Ardsley Advisory Partners's argenx position peaked at $20.2M in Q4 2025.
  • 477 funds tracked by Wall St. Rank held argenx as of Q1 2026.

Based on Ardsley Advisory Partners's 13F filing for Q1 2026, filed 15 May 2026.