Optiver Holding’s argenx ARGX Stock Holding History

Optiver Holding’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
2023 Q4	–	Sell	-20,500	Closed	-$10.1M	–	490
2023 Q3	$10.1M	Hold	20,500	–	–	0.01%	268
2023 Q2	$7.99M	Sell	20,500 -24,400	-54%	-$9.6M	0.01%	281
2023 Q1	$16.7M	Sell	44,900 -4,500	-9%	-$1.67M	0.01%	251
2022 Q4	$18.7M	Sell	49,400 -4,000	-7%	-$1.5M	0.02%	192
2022 Q3	$18.9M	Buy	53,400 +47,700	+837%	+$17.7M	0.02%	149
2022 Q2	$2.16M	Sell	5,700 -12,200	-68%	-$3.93M	﹤0.01%	215
2022 Q1	$5.64M	Sell	17,900 -38,900	-68%	-$11.3M	0.01%	162
2021 Q4	$18.3M	Buy	56,800 +23,900	+73%	+$7.27M	0.02%	137
2021 Q3	$9.94M	Buy	32,900 +7,700	+31%	+$2.44M	0.01%	138
2021 Q2	$7.59M	Buy	+25,200	New	+$7.17M	0.01%	126
2021 Q1	–	Hold	0	–	–	–	89

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

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

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

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 New York $5.72T AUM 30.48% 1-Year Est. Return

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

Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return

Optiver Holding's ARGX Position: Q1 2026 in Review

Optiver Holding increased its argenx (ARGX) stake by 907% in Q1 2026, buying an estimated $7.13M and bringing the position to 10,110 shares worth $7.38M. The position accounts for ﹤0.01% of the portfolio, ranked #395.

Optiver Holding first reported a position in ARGX in Q1 2021 and has held it in 15 quarters since. The position peaked at $9.59M in Q2 2025. 475 funds tracked by Wall St. Rank hold ARGX as of Q1 2026.

Optiver Holding held 10,110 shares of argenx worth $7.38M as of Q1 2026.
Optiver Holding bought 9,106 argenx shares in Q1 2026, an estimated $7.13M.
argenx made up ﹤0.01% of Optiver Holding's portfolio in Q1 2026, its #395 holding.
Optiver Holding first reported a position in argenx in Q1 2021 and has held it in 15 quarters since.
Optiver Holding's argenx position peaked at $9.59M in Q2 2025.
475 funds tracked by Wall St. Rank held argenx as of Q1 2026.

Based on Optiver Holding's 13F filing for Q1 2026, filed 15 May 2026.