Calamos Advisors
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Calamos Advisors’s argenx ARGX Stock Holding History

Calamos Advisors’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
-4,640
Closed -$3.9M – 1206
2025
Q4 		$3.9M Sell
4,640
-530
-10% -$454K 0.01% 560
2025
Q3 		$3.81M Buy
5,170
+2,530
+96% +$1.67M 0.01% 573
2025
Q2 		$1.46M Hold
2,640
– – 0.01% 662
2025
Q1 		$1.56M Buy
+2,640
New +$1.67M 0.01% 615

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

Calamos Advisors's ARGX Position: Q1 2026 in Review

Calamos Advisors sold out of argenx (ARGX) in Q1 2026, closing a stake of 4,640 shares — an estimated $3.9M sold.

Calamos Advisors first reported a position in ARGX in Q1 2025 and held it in 4 quarters. The position peaked at $3.9M in Q4 2025. 476 funds tracked by Wall St. Rank hold ARGX as of Q1 2026.

  • Calamos Advisors reported no remaining argenx position as of Q1 2026 after selling out during the quarter.
  • Calamos Advisors sold 4,640 argenx shares in Q1 2026, an estimated $3.9M.
  • Calamos Advisors first reported a position in argenx in Q1 2025 and held it in 4 quarters.
  • Calamos Advisors's argenx position peaked at $3.9M in Q4 2025.
  • 476 funds tracked by Wall St. Rank held argenx as of Q1 2026.

Based on Calamos Advisors's 13F filing for Q1 2026, filed 4 May 2026.