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.
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Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest 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 | 2.7% |
| 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 |
| Artisan Partners Limited Partnership | Increased | 1.5M | 1.5M | +40.8K |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | New | 0 | 40.1K | +40.1K |
| Point72 Asset Management, L.P. | New | 0 | 40.0K | +40.0K |
| Squarepoint Ops LLC | Increased | 18.7K | 58.4K | +39.7K |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | Reduced | 90.0K | 50.6K | -39.4K |
| JANE STREET GROUP, LLC | Sold Out | 38.4K | 0 | -38.4K |
| Life Cycle Investment Partners Ltd | Reduced | 58.9K | 22.5K | -36.4K |
| Davern Capital Partners, LP | Sold Out | 35.0K | 0 | -35.0K |
| AMERIPRISE FINANCIAL INC | Reduced | 215.9K | 181.5K | -34.4K |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | Increased | 27.5K | 61.3K | +33.8K |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE | Reduced | 49.3K | 16.4K | -32.9K |
| SEI INVESTMENTS CO | Reduced | 287.0K | 255.1K | -31.9K |
| BlackRock, Inc. | Reduced | 808.3K | 777.2K | -31.1K |
| Mediolanum International Funds Ltd | New | 0 | 29.8K | +29.8K |
| PEREGRINE CAPITAL MANAGEMENT LLC | New | 0 | 29.7K | +29.7K |
| ALLIANCEBERNSTEIN L.P. | Reduced | 422.3K | 395.7K | -26.6K |
| Legal & General Group Plc | Increased | 150.9K | 177.2K | +26.3K |
| Jones Hill Capital LP | Sold Out | 26.0K | 0 | -26.0K |
| Candriam S.C.A. | Increased | 54.1K | 80.1K | +26.0K |
| BAKER BROS. ADVISORS LP | Sold Out | 25.2K | 0 | -25.2K |
| Hudson Bay Capital Management LP | Reduced | 30.0K | 5.0K | -25.0K |
| PGGM Investments | Increased | 71.5K | 96.5K | +25.0K |
| Clearbridge Investments, LLC | Increased | 231.4K | 253.8K | +22.4K |
| MILLENNIUM MANAGEMENT LLC | Increased | 72.4K | 94.4K | +22.0K |
| Checkpoint Capital L.P. | Reduced | 153.0K | 131.3K | -21.7K |
| BNP PARIBAS FINANCIAL MARKETS | Reduced | 177.8K | 158.0K | -19.9K |
| Ensign Peak Advisors, Inc | Reduced | 71.6K | 52.0K | -19.6K |
| Assenagon Asset Management S.A. | Increased | 14.8K | 33.1K | +18.3K |
| VAN ECK ASSOCIATES CORP | Reduced | 40.4K | 22.2K | -18.2K |
| NEW YORK STATE COMMON RETIREMENT FUND | Reduced | 39.4K | 22.1K | -17.4K |
| HRT FINANCIAL LP | Increased | 18.8K | 36.1K | +17.3K |
| PINEBRIDGE INVESTMENTS LLC | Reduced | 103.8K | 87.1K | -16.8K |
| Soleus Capital Management, L.P. | Increased | 3.5K | 20.0K | +16.5K |
| FIL Ltd | New | 0 | 16.2K | +16.2K |
| LMR Partners LLP | Reduced | 23.5K | 8.2K | -15.3K |
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.