ARGX Institutional Ownership & Shareholders
ARGENX SE - ADR (ARGX) is currently held by 518 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $25.37B based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Fmr Llc is currently the largest disclosed institutional shareholder of ARGX tracked by InsiderSet, reporting ownership valued at approximately $4.85B in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $4.67B, representing an estimated loss of -3.76% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 65% of the total disclosed ARGX value among the investors covered in this analysis. Major shareholders include Fmr Llc, Price T Rowe Associates Inc, Capital World Investors, and several other long-term asset managers with concentrated positions in ARGENX SE - ADR (ARGX).
This page ranks the largest institutional ARGX shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
518
Total Reported Value
$25.37B
Largest Holder
Fmr Llc
Largest Position
$4.85B
Insider Transactions (90d)
0
Latest Filing Quarter
Q2 2026
New Institutional Positions
63
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Fmr Llc | 0.21% | 5,231,452 | $4,853,584,395 | $4,671,006,547 | -$182,577,848 | -3.76% | |
| Price T Rowe Associates Inc | 0.25% | 2,678,047 | $2,484,612,000 | $2,391,147,825 | -$93,464,175 | -3.76% | |
| Capital World Investors | 0.24% | 2,199,770 | $2,040,767,346 | $1,964,108,640 | -$76,658,706 | -3.76% | |
| Janus Henderson Group Plc | 0.92% | 2,541,732 | $1,847,592,427 | $2,269,436,251 | +$421,843,824 | +22.83% | |
| Artisan Partners Limited Partnership | 2.28% | 1,508,778 | $1,399,799,026 | $1,347,142,613 | -$52,656,413 | -3.76% | |
| Avoro Capital Advisors Llc | 8.33% | 1,000,000 | $927,770,000 | $892,870,000 | -$34,900,000 | -3.76% | |
| Wellington Management Group Llp | 0.15% | 930,548 | $863,334,518 | $830,858,393 | -$32,476,125 | -3.76% | |
| Blackrock, Inc. | 0.01% | 777,204 | $721,067,008 | $693,942,135 | -$27,124,873 | -3.76% | |
| Rtw Investments, Lp | 5.62% | 709,446 | $658,202,715 | $633,443,050 | -$24,759,665 | -3.76% | |
| Morgan Stanley | 0.03% | 643,123 | $596,672,325 | $574,225,233 | -$22,447,092 | -3.76% | |
| Invesco Ltd. | 0.03% | 443,990 | $411,920,603 | $396,425,351 | -$15,495,252 | -3.76% | |
| Bank Of America Corp | 0.02% | 400,234 | $371,325,384 | $357,356,932 | -$13,968,452 | -3.76% | |
| Alliancebernstein L.P. | 0.10% | 395,661 | $288,931,445 | $353,273,837 | +$64,342,392 | +22.27% | |
| Bellevue Group Ag | 5.88% | 301,000 | $279,258,770 | $268,753,870 | -$10,504,900 | -3.76% | |
| Sands Capital Management, Llc | 1.03% | 298,599 | $277,031,194 | $266,610,089 | -$10,421,105 | -3.76% | |
| Bessemer Group Inc | 0.34% | 267,779 | $248,438,000 | $239,091,836 | -$9,346,164 | -3.76% | |
| William Blair Investment Management, Llc | 0.74% | 264,617 | $245,489,701 | $236,268,581 | -$9,221,120 | -3.76% | |
| Sei Investments Co | 0.21% | 255,073 | $236,651,864 | $227,747,030 | -$8,904,834 | -3.76% | |
| Clearbridge Investments, Llc | 0.19% | 253,776 | $235,446,001 | $226,588,977 | -$8,857,024 | -3.76% | |
| Jennison Associates Llc | 0.13% | 226,200 | $209,861,770 | $201,967,194 | -$7,894,576 | -3.76% | |
| Citadel Advisors Llc | 0.11% | 212,416 | $197,073,193 | $189,659,874 | -$7,413,319 | -3.76% | |
| Pictet Asset Management Holding Sa | 0.18% | 198,282 | $183,807,971 | $177,040,049 | -$6,767,922 | -3.68% | |
| Two Sigma Investments, Lp | 0.13% | 185,638 | $172,229,367 | $165,750,601 | -$6,478,766 | -3.76% | |
| Ameriprise Financial Inc | 0.03% | 181,464 | $168,357,896 | $162,023,762 | -$6,334,134 | -3.76% | |
| Goldman Sachs Group Inc | 0.02% | 177,846 | $165,000,525 | $158,793,358 | -$6,207,167 | -3.76% | |
| Legal & General Group Plc | 0.03% | 177,164 | $164,367,479 | $158,184,421 | -$6,183,058 | -3.76% | |
| American Century Companies Inc | 0.07% | 173,193 | $160,689,474 | $154,638,834 | -$6,050,640 | -3.77% | |
| Allspring Global Investments Holdings, Llc | 0.24% | 170,829 | $155,368,976 | $152,528,089 | -$2,840,887 | -1.83% | |
| Bnp Paribas Financial Markets | 0.08% | 157,958 | $146,548,694 | $141,035,959 | -$5,512,735 | -3.76% | |
| 1832 Asset Management L.P. | 0.18% | 157,940 | $146,531,994 | $141,019,888 | -$5,512,106 | -3.76% | |
| Deutsche Bank Ag\ | 0.04% | 137,335 | $127,415,293 | $122,622,301 | -$4,792,992 | -3.76% | |
| Bamco Inc | 0.19% | 136,654 | $126,783,482 | $122,014,257 | -$4,769,225 | -3.76% | |
| Barclays Plc | 0.04% | 134,427 | $124,717,338 | $120,025,835 | -$4,691,503 | -3.76% | |
| Lazard Asset Management Llc | 0.19% | 131,996 | $122,462,170 | $117,855,269 | -$4,606,901 | -3.76% | |
| Checkpoint Capital L.P. | 31.25% | 131,283 | $121,800,429 | $117,218,652 | -$4,581,777 | -3.76% | |
| Eventide Asset Management, Llc | 1.56% | 125,668 | $116,575,798 | $112,205,187 | -$4,370,611 | -3.75% | |
| Agf Management Ltd | 0.45% | 125,481 | $116,417,507 | $112,038,220 | -$4,379,287 | -3.76% | |
| Bnp Paribas Asset Management Holding S.A. | 0.11% | 121,786 | $112,989,398 | $108,739,066 | -$4,250,332 | -3.76% | |
| Lord, Abbett & Co. Llc | 0.29% | 108,253 | $100,434,000 | $96,655,856 | -$3,778,144 | -3.76% | |
| First Trust Advisors Lp | 0.06% | 101,440 | $94,112,988 | $90,572,733 | -$3,540,255 | -3.76% | |
| Pggm Investments | 2.20% | 96,511 | $89,540,000 | $86,171,777 | -$3,368,223 | -3.76% | |
| Millennium Management Llc | 0.06% | 94,401 | $87,582,416 | $84,287,821 | -$3,294,595 | -3.76% | |
| Orbimed Advisors Llc | 1.63% | 92,880 | $86,171,278 | $82,929,766 | -$3,241,512 | -3.76% | |
| Fiera Capital Corp | 0.30% | 90,423 | $83,891,746 | $80,735,984 | -$3,155,762 | -3.76% | |
| Capital Research Global Investors | 0.01% | 88,511 | $82,117,850 | $79,028,817 | -$3,089,033 | -3.76% | |
| Federated Hermes, Inc. | 0.12% | 87,288 | $80,983,188 | $77,936,837 | -$3,046,351 | -3.76% | |
| Pinebridge Investments Llc | 0.67% | 87,050 | $80,762,379 | $77,724,334 | -$3,038,046 | -3.76% | |
| Public Sector Pension Investment Board | 0.21% | 84,300 | $78,211,011 | $75,268,941 | -$2,942,070 | -3.76% | |
| Aberdeen Group Plc | 0.11% | 83,822 | $77,767,537 | $74,842,149 | -$2,925,388 | -3.76% | |
| Timessquare Capital Management, Llc | 1.13% | 83,114 | $77,110,676 | $74,209,997 | -$2,900,679 | -3.76% |
Frequently asked questions about ARGX
Who are the largest institutional holders of ARGX?
The largest institutional holders of ARGX reported in the latest SEC Form 13F filings include Fmr Llc, Price T Rowe Associates Inc, Capital World Investors, Janus Henderson Group Plc, and Artisan Partners Limited Partnership. InsiderSet ranks institutional holders by their latest reported ARGX position.
What is ARGX institutional ownership?
This page tracks ARGX positions reported by institutional investment managers through SEC Form 13F. ARGENX SE - ADR (ARGX) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own ARGX?
InsiderSet currently tracks 518 institutional managers reporting ARGX holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of ARGX shareholders.
How much ARGX stock do institutions own?
Institutional investment managers disclosed approximately $25.37B in ARGX holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was ARGX institutional ownership last updated?
The latest ARGX institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional ARGX holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its ARGX position after the reporting date.
Are institutions buying or selling ARGX?
Institutional buying and selling can be analyzed by comparing ARGX positions across consecutive 13F reporting periods. InsiderSet's ARGX Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View ARGX ownership changes.
How has ARGX institutional ownership changed over time?
InsiderSet tracks ARGX institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.