Brown Brothers Harriman & Co’s argenx ARGX Stock Holding History

Brown Brothers Harriman & Co’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	$112K	Buy	121 +29	+32%	+$23.9K	﹤0.01%	973
2026 Q1	$67.2K	Buy	92 +63	+217%	+$49.3K	﹤0.01%	1006
2025 Q4	$24.4K	Buy	29 +21	+263%	+$18K	﹤0.01%	1169
2025 Q3	$5.9K	Sell	8 -1	-11%	-$659	﹤0.01%	1382
2025 Q2	$4.96K	Buy	+9	New	+$5.22K	﹤0.01%	1273
2022 Q4	–	Sell	-5	Closed	-$2K	–	1263
2022 Q3	$2K	Buy	+5	New	+$1.85K	﹤0.01%	1407

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

Brown Brothers Harriman & Co's ARGX Position: Q2 2026 in Review

Brown Brothers Harriman & Co increased its argenx (ARGX) stake by 32% in Q2 2026, buying an estimated $23.9K and bringing the position to 121 shares worth $112K. The position accounts for ﹤0.01% of the portfolio, ranked #973.

Brown Brothers Harriman & Co first reported a position in ARGX in Q3 2022 and has held it in 6 quarters since. 505 funds tracked by Wall St. Rank hold ARGX as of Q2 2026.

Brown Brothers Harriman & Co held 121 shares of argenx worth $112K as of Q2 2026.
Brown Brothers Harriman & Co bought 29 argenx shares in Q2 2026, an estimated $23.9K.
argenx made up ﹤0.01% of Brown Brothers Harriman & Co's portfolio in Q2 2026, its #973 holding.
Brown Brothers Harriman & Co first reported a position in argenx in Q3 2022 and has held it in 6 quarters since.
505 funds tracked by Wall St. Rank held argenx as of Q2 2026.

Based on Brown Brothers Harriman & Co's 13F filing for Q2 2026, filed 12 Aug 2026.