Who owns ARGENX SE?
Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.
Institutional ownership of ARGX from SEC Form 13F filings across 509 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
As of the 2026-06-30 reporting period, 509 institutions disclosed 28.2M shares of ARGENX SE worth $26.11B — about 45.4% of shares outstanding; the largest disclosed holder is FMR LLC. Source: SEC Form 13F filings, parsed by EvidInvest.
509
13F holders
$26.11B
value, 2026 filers
45.4%
of shares outstanding (28.2M sh)
90
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30 · % of fund = share of the manager's own book · % of co. = share of ARGX's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | FMR LLC | 5.2M | $4.85B | 0.2% | 8.4% | +4.8% |
| 2 | PRICE T ROWE ASSOCIATES INC /MD/ | 2.7M | $2.48B | 0.2% | 4.3% | -20.6% |
| 3 | Jupiter Topco LLCNEW | 2.5M | $2.30B | 0.9% | 4% | new |
| 4 | Capital World Investors | 2.2M | $2.04B | 0.2% | 3.5% | -2.5% |
| 5 | Artisan Partners Limited Partnership | 1.5M | $1.40B | 2.2% | 2.4% | +2.8% |
| 6 | Avoro Capital Advisors LLC | 1.0M | $927.8M | 8.3% | 1.6% | 0.0% |
| 7 | WELLINGTON MANAGEMENT GROUP LLP | 930,548 | $863.3M | 0.1% | 1.5% | -8.9% |
| 8 | BlackRock, Inc. | 777,237 | $721.1M | 0.0% | 1.2% | -3.8% |
| 9 | RTW INVESTMENTS, LP | 709,446 | $658.2M | 5.6% | 1.1% | 0.0% |
| 10 | MORGAN STANLEY | 643,123 | $596.7M | 0.0% | 1% | +14.7% |
| 11 | Invesco Ltd. | 443,990 | $411.9M | 0.0% | 0.7% | -25.3% |
| 12 | BANK OF AMERICA CORP /DE/ | 400,234 | $371.3M | 0.0% | 0.6% | 0.0% |
| 13 | ALLIANCEBERNSTEIN L.P. | 395,661 | $288.9M | 0.1% | 0.6% | -6.3% |
| 14 | Bellevue Group AG | 301,000 | $279.3M | 5.9% | 0.5% | -3.8% |
| 15 | SANDS CAPITAL MANAGEMENT, LLC | 298,599 | $277.0M | 1.0% | 0.5% | -12.3% |
| 16 | BESSEMER GROUP INC | 267,779 | $248.4M | 0.3% | 0.4% | +316.8% |
| 17 | WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC | 264,617 | $245.5M | 0.7% | 0.4% | -0.5% |
| 18 | SEI INVESTMENTS CO | 255,073 | $236.7M | 0.2% | 0.4% | -11.1% |
| 19 | Clearbridge Investments, LLC | 253,776 | $235.4M | 0.2% | 0.4% | +9.7% |
| 20 | JENNISON ASSOCIATES LLC | 226,200 | $209.9M | 0.1% | 0.4% | -4.7% |
| 21 | FRANKLIN RESOURCES INC | 224,930 | $208.7M | 0.0% | 0.4% | -3.7% |
| 22 | CITADEL ADVISORS LLC | 212,416 | $197.1M | 0.0% | 0.3% | -3.1% |
| 23 | Pictet Asset Management Holding SA | 198,282 | $183.8M | 0.2% | 0.3% | +33.7% |
| 24 | TWO SIGMA INVESTMENTS, LP | 185,638 | $172.2M | 0.1% | 0.3% | +70.1% |
| 25 | AMERIPRISE FINANCIAL INC | 181,464 | $168.4M | 0.0% | 0.3% | -16.0% |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.