ARGX argenx SE
argenx SE (ARGX) Institutional Ownership
What the institutions did with ARGX last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
Sign in or subscribeLargest holders
| Manager | Shares | % of reported |
|---|---|---|
| FMR LLC | 5.2M | 18.5% |
| PRICE T ROWE ASSOCIATES INC /MD/ | 2.7M | 9.5% |
| Jupiter Topco LLC | 2.5M | 8.8% |
| Capital World Investors | 2.2M | 7.8% |
| Artisan Partners Limited Partnership | 1.5M | 5.3% |
| Avoro Capital Advisors LLC | 1.0M | 3.5% |
| WELLINGTON MANAGEMENT GROUP LLP | 930.5K | 3.3% |
| BlackRock, Inc. | 777.2K | 2.8% |
| RTW INVESTMENTS, LP | 709.4K | 2.5% |
| MORGAN STANLEY | 643.1K | 2.3% |
| Invesco Ltd. | 444.0K | 1.6% |
| BANK OF AMERICA CORP /DE/ | 400.2K | 1.4% |
| ALLIANCEBERNSTEIN L.P. | 395.7K | 1.4% |
| Bellevue Group AG | 301.0K | 1.1% |
| SANDS CAPITAL MANAGEMENT, LLC | 298.6K | 1.1% |
| BESSEMER GROUP INC | 267.8K | 0.9% |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC | 264.6K | 0.9% |
| SEI INVESTMENTS CO | 255.1K | 0.9% |
| Clearbridge Investments, LLC | 253.8K | 0.9% |
| JENNISON ASSOCIATES LLC | 226.2K | 0.8% |
| FRANKLIN RESOURCES INC | 224.9K | 0.8% |
| CITADEL ADVISORS LLC | 212.4K | 0.8% |
| Pictet Asset Management Holding SA | 198.3K | 0.7% |
| TWO SIGMA INVESTMENTS, LP | 185.6K | 0.7% |
| AMERIPRISE FINANCIAL INC | 181.5K | 0.6% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| PRICE T ROWE ASSOCIATES INC /MD/ | Reduced | 3.4M | 2.7M | -696.9K |
| FMR LLC | Increased | 5.0M | 5.2M | +240.4K |
| BESSEMER GROUP INC | Increased | 64.3K | 267.8K | +203.5K |
| Invesco Ltd. | Reduced | 594.7K | 444.0K | -150.7K |
| BARCLAYS PLC | Increased | 5.5K | 134.4K | +128.9K |
| Fiera Capital Corp | Reduced | 217.2K | 90.4K | -126.8K |
| WELLINGTON MANAGEMENT GROUP LLP | Reduced | 1.0M | 930.5K | -90.9K |
| Capital Research Global Investors | New | 0 | 88.5K | +88.5K |
| MORGAN STANLEY | Increased | 560.7K | 643.1K | +82.4K |
| TWO SIGMA INVESTMENTS, LP | Increased | 109.1K | 185.6K | +76.5K |
| 1832 Asset Management L.P. | Increased | 84.2K | 157.9K | +73.7K |
| BRAIDWELL LP | Reduced | 84.9K | 17.7K | -67.2K |
| CANADA PENSION PLAN INVESTMENT BOARD | New | 0 | 60.6K | +60.6K |
| WESTFIELD CAPITAL MANAGEMENT CO LP | New | 0 | 57.1K | +57.1K |
| Capital World Investors | Reduced | 2.3M | 2.2M | -56.4K |
| TD Asset Management Inc | Reduced | 80.8K | 24.7K | -56.1K |
| Woodline Partners LP | New | 0 | 55.0K | +55.0K |
| GOLDMAN SACHS GROUP INC | Reduced | 232.0K | 177.8K | -54.1K |
| Pictet Asset Management Holding SA | Increased | 148.3K | 198.3K | +50.0K |
| USS Investment Management Ltd | Increased | 12.1K | 57.9K | +45.8K |
| Rock Springs Capital Management LP | Reduced | 98.5K | 52.8K | -45.8K |
| ORBIMED ADVISORS LLC | Reduced | 136.9K | 92.9K | -44.0K |
| D. E. Shaw & Co., Inc. | Reduced | 52.1K | 8.3K | -43.9K |
| LORD, ABBETT & CO. LLC | Reduced | 152.1K | 108.3K | -43.8K |
| SANDS CAPITAL MANAGEMENT, LLC | Reduced | 340.3K | 298.6K | -41.7K |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.