Jane Street
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Jane Street’s argenx ARGX Stock Holding History

Jane Street’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 		$5.77M Sell
7,900
-3,400
-30% -$2.66M ﹤0.01% 3298
2025
Q4 		$9.5M Sell
11,300
-14,900
-57% -$12.8M ﹤0.01% 2380
2025
Q3 		$19.3M Buy
26,200
+20,900
+394% +$13.8M ﹤0.01% 1692
2025
Q2 		$2.92M Sell
5,300
-5,600
-51% -$3.25M ﹤0.01% 3797
2025
Q1 		$6.45M Sell
10,900
-11,600
-52% -$7.32M ﹤0.01% 2544
2024
Q4 		$13.8M Buy
22,500
+18,400
+449% +$10.8M ﹤0.01% 1596
2024
Q3 		$2.22M Sell
4,100
-1,500
-27% -$758K ﹤0.01% 4255
2024
Q2 		$2.41M Buy
5,600
+1,900
+51% +$727K ﹤0.01% 4177
2024
Q1 		$1.46M Sell
3,700
-500
-12% -$194K ﹤0.01% 4702
2023
Q4 		$1.6M Buy
+4,200
New +$1.96M ﹤0.01% 4727
2023
Q3 		– Sell
-36,600
Closed -$14.3M – 8579
2023
Q2 		$14.3M Buy
36,600
+32,100
+713% +$12.6M ﹤0.01% 1538
2023
Q1 		$1.68M Buy
4,500
+1,000
+29% +$370K ﹤0.01% 4134
2022
Q4 		$1.33M Sell
3,500
-26,800
-88% -$10M ﹤0.01% 4522
2022
Q3 		$10.7M Buy
30,300
+1,100
+4% +$408K ﹤0.01% 1618
2022
Q2 		$11.1M Buy
29,200
+1,700
+6% +$548K ﹤0.01% 1625
2022
Q1 		$8.67M Buy
27,500
+26,600
+2,956% +$7.73M ﹤0.01% 2174
2021
Q4 		$315K Sell
900
-32,300
-97% -$9.82M ﹤0.01% 8073
2021
Q3 		$10M Sell
33,200
-6,700
-17% -$2.12M ﹤0.01% 1804
2021
Q2 		$12M Buy
39,900
+6,000
+18% +$1.71M ﹤0.01% 1515
2021
Q1 		$9.34M Sell
33,900
-2,400
-7% -$758K ﹤0.01% 1620
2020
Q4 		$10.7M Sell
36,300
-38,100
-51% -$10.5M 0.01% 1361
2020
Q3 		$19.5M Buy
74,400
+13,400
+22% +$3.22M 0.01% 784
2020
Q2 		$13.7M Buy
+61,000
New +$10.8M 0.01% 977

Other funds holding ARGX

Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $865B AUM 30.76% 1-Year Est. Return
Janus Henderson Group
Janus Henderson Group London, United Kingdom $209B AUM 37.72% 1-Year Est. Return
Capital World Investors
Capital World Investors Los Angeles, California $733B AUM 35.63% 1-Year Est. Return
Artisan Partners
Artisan Partners Milwaukee, Wisconsin $62.3B AUM 26.25% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return
ACA
Avoro Capital Advisors New York $10.2B AUM 149.19% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
RI
RTW Investments New York $10B AUM 135.35% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return

Jane Street's ARGX Position: Q1 2026 in Review

Jane Street increased its argenx (ARGX) stake by 35% in Q1 2026, buying an estimated $7.79M and bringing the position to 38,438 shares worth $28.1M. The position accounts for ﹤0.01% of the portfolio, ranked #1494.

Jane Street first reported a position in ARGX in Q1 2018 and has held it in 27 quarters since. The position peaked at $36.8M in Q3 2025. 476 funds tracked by Wall St. Rank hold ARGX as of Q1 2026.

  • Jane Street held 38,438 shares of argenx worth $28.1M as of Q1 2026.
  • Jane Street bought 9,953 argenx shares in Q1 2026, an estimated $7.79M.
  • argenx made up ﹤0.01% of Jane Street's portfolio in Q1 2026, its #1494 holding.
  • Jane Street first reported a position in argenx in Q1 2018 and has held it in 27 quarters since.
  • Jane Street's argenx position peaked at $36.8M in Q3 2025.
  • 476 funds tracked by Wall St. Rank held argenx as of Q1 2026.

Based on Jane Street's 13F filing for Q1 2026, filed 12 May 2026.