How Institutional Funds Moved on ARGX

Position changes disclosed in SEC Form 13F filings. These report a quarterly snapshot, not exact trade dates.

FundChangeQuarter
WESTFIELD CAPITAL MANAGEMENT CO LP WESTFIELD CAPITAL MANAGEMENT CO LP opened a new position worth $52,958,761. 2026-06-30
Capital Research Global Investors Capital Research Global Investors opened a new position worth $82,117,850. 2026-06-30
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP ARROWSTREET CAPITAL, LIMITED PARTNERSHIP opened a new position worth $37,168,322. 2026-06-30
CANADA PENSION PLAN INVESTMENT BOARD CANADA PENSION PLAN INVESTMENT BOARD opened a new position worth $56,201,523. 2026-06-30
Woodline Partners LP Woodline Partners LP opened a new position worth $51,050,544. 2026-06-30
USS Investment Management Ltd USS Investment Management Ltd increased this position by 433% ($10,092,416 -> $53,751,355). 2026-06-30
Capital World Investors Capital World Investors increased this position by 24% ($1,647,408,306 -> $2,040,767,346). 2026-06-30
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC increased this position by 26% ($194,364,029 -> $245,489,701). 2026-06-30

Which Funds Hold ARGX

Largest reported positions as of 2026-06-30.

FundValueShares
FMR LLC $3,592,931,274 3,872,653
Capital World Investors $2,040,767,346 2,199,770
Artisan Partners Limited Partnership $1,399,799,026 1,508,778
Avoro Capital Advisors LLC $927,770,000 1,000,000
RTW INVESTMENTS, LP $658,202,715 709,446
WELLINGTON MANAGEMENT GROUP LLP $565,365,410 609,381
Invesco Ltd. $390,898,262 421,331
ALLIANCEBERNSTEIN L.P. $288,931,445 395,661
Bellevue Group AG $279,258,770 301,000
SANDS CAPITAL MANAGEMENT, LLC $277,031,194 298,599

Data compiled from public SEC filings. This is informational reporting, not investment advice.

Soleus Capital Management, L.P.: 13F Portfolio Moves Tracked Quarterly

Chart-style summary of Soleus Capital Management, L.P.'s 13F portfolio changes for the quarter ending 2026-03-31, showing new positions, increases, and exits across healthcare and biotech stocks.

Soleus Capital Management, L.P. is a healthcare-focused institutional investor whose equity holdings are disclosed each quarter through SEC Form 13F filings. This profile tracks those disclosures over time, giving a running record of the fund’s reported buys, sells, and position size changes as new 13F data becomes available. Because 13F filings only capture a quarterly … Read more