Custom Index Systems’s argenx ARGX Stock Holding History

Custom Index Systems’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 Q2	$284K	Sell	306 -1	-0.3%	-$825	0.1%	211
2026 Q1	$224K	Sell	307 -310	-50%	-$243K	0.1%	231
2025 Q4	$519K	Sell	617 -320	-34%	-$274K	0.23%	127
2025 Q3	$691K	Sell	937 -228	-20%	-$150K	0.21%	129
2025 Q2	$642K	Sell	1,165 -983	-46%	-$570K	0.31%	93
2025 Q1	$1.27M	Buy	+2,148	New	+$1.36M	0.64%	30

Other funds holding ARGX

Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return

T. Rowe Price Associates Baltimore, Maryland $999B AUM 46.22% 1-Year Est. Return

Jupiter Topco New York $245B AUM

Capital World Investors Los Angeles, California $846B AUM 46.74% 1-Year Est. Return

Artisan Partners Milwaukee, Wisconsin $63.1B AUM 35.51% 1-Year Est. Return

ACA

Avoro Capital Advisors New York $11.1B AUM 207.82% 1-Year Est. Return

Wellington Management Group Boston, Massachusetts $580B AUM 38.23% 1-Year Est. Return

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

RTW Investments New York $11.7B AUM 174.13% 1-Year Est. Return

Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return

Custom Index Systems's ARGX Position: Q2 2026 in Review

Custom Index Systems reduced its argenx (ARGX) stake by 0.33% in Q2 2026, selling an estimated $825 and leaving 306 shares worth $284K. The position accounts for 0.1% of the portfolio, ranked #211.

Custom Index Systems first reported a position in ARGX in Q1 2025 and has held it in 6 quarters since. The position peaked at $1.27M in Q1 2025. 508 funds tracked by Wall St. Rank hold ARGX as of Q2 2026.

Custom Index Systems held 306 shares of argenx worth $284K as of Q2 2026.
Custom Index Systems sold 1 argenx share in Q2 2026, an estimated $825.
argenx made up 0.1% of Custom Index Systems's portfolio in Q2 2026, its #211 holding.
Custom Index Systems first reported a position in argenx in Q1 2025 and has held it in 6 quarters since.
Custom Index Systems's argenx position peaked at $1.27M in Q1 2025.
508 funds tracked by Wall St. Rank held argenx as of Q2 2026.

Based on Custom Index Systems's 13F filing for Q2 2026, filed 14 Aug 2026.