ARGENX SE - ADR (ARGX) Institutional Shareholders
ARGENX SE - ADR (ARGX) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026. The institutional investors covered on this page collectively reported approximately $18.44B in ARGX holdings during the latest filing period.
Fmr Llc is currently the largest disclosed institutional shareholder of ARGX tracked by InsiderSet, reporting ownership valued at approximately $3.64B in its March 31, 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 $4.26B, representing an estimated gain of +16.92% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 63% of the total disclosed ARGX value among the investors covered in this analysis. Major shareholders include Fmr Llc, Janus Henderson Group Plc, 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
468
Total Reported Value
$18.44B
Largest Holder
Fmr Llc
Largest Position
$3.64B
Insider Transactions (90d)
0
Latest Filing Quarter
Q2 2026
New Institutional Positions
61
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Fmr Llc | 0.19% | 4,991,034 | $3,644,702,751 | $4,261,444,650 | +$616,741,899 | +16.92% | |
| Janus Henderson Group Plc | 0.92% | 2,541,732 | $1,847,592,427 | $2,170,181,616 | +$322,589,189 | +17.46% | |
| Capital World Investors | 0.22% | 2,256,216 | $1,647,408,306 | $1,926,402,345 | +$278,994,039 | +16.94% | |
| Artisan Partners Limited Partnership | 1.75% | 1,467,982 | $1,071,993,495 | $1,253,392,391 | +$181,398,896 | +16.92% | |
| Wellington Management Group Llp | 0.14% | 1,021,457 | $745,918,975 | $872,140,416 | +$126,221,441 | +16.92% | |
| Avoro Capital Advisors Llc | 7.19% | 1,000,000 | $730,250,000 | $853,820,000 | +$123,570,000 | +16.92% | |
| Blackrock, Inc. | 0.01% | 808,337 | $590,288,301 | $690,174,297 | +$99,885,996 | +16.92% | |
| Rtw Investments, Lp | 5.16% | 709,446 | $518,072,942 | $605,739,184 | +$87,666,242 | +16.92% | |
| Invesco Ltd. | 0.07% | 594,697 | $434,277,485 | $507,764,193 | +$73,486,708 | +16.92% | |
| Morgan Stanley | 0.02% | 560,711 | $409,460,421 | $478,746,266 | +$69,285,845 | +16.92% | |
| Alliancebernstein L.P. | 0.11% | 422,304 | $355,136,549 | $360,571,601 | +$5,435,052 | +1.53% | |
| Bank Of America Corp | 0.02% | 400,117 | $292,185,476 | $341,627,897 | +$49,442,421 | +16.92% | |
| Sands Capital Management, Llc | 0.97% | 340,285 | $248,493,121 | $290,542,139 | +$42,049,018 | +16.92% | |
| Bellevue Group Ag | 5.44% | 313,000 | $228,568,250 | $267,245,660 | +$38,677,410 | +16.92% | |
| Sei Investments Co | 0.19% | 286,966 | $209,555,667 | $245,017,310 | +$35,461,643 | +16.92% | |
| William Blair Investment Management, Llc | 0.64% | 266,067 | $194,364,029 | $227,173,326 | +$32,809,297 | +16.88% | |
| Pictet Asset Management Holding Sa | 0.18% | 198,282 | $183,807,971 | $169,297,137 | -$14,510,834 | -7.89% | |
| Jennison Associates Llc | 0.12% | 237,468 | $173,410,659 | $202,754,928 | +$29,344,269 | +16.92% | |
| Franklin Resources Inc | 0.04% | 233,493 | $170,508,460 | $199,360,993 | +$28,852,533 | +16.92% | |
| Goldman Sachs Group Inc | 0.02% | 231,985 | $169,407,178 | $198,073,433 | +$28,666,255 | +16.92% | |
| Clearbridge Investments, Llc | 0.15% | 231,356 | $168,947,529 | $197,536,380 | +$28,588,851 | +16.92% | |
| Citadel Advisors Llc | 0.11% | 219,126 | $160,016,761 | $187,094,161 | +$27,077,400 | +16.92% | |
| Fiera Capital Corp | 0.54% | 217,198 | $158,608,839 | $185,447,996 | +$26,839,157 | +16.92% | |
| Ameriprise Financial Inc | 0.04% | 215,910 | $157,671,861 | $184,348,276 | +$26,676,415 | +16.92% | |
| Allspring Global Investments Holdings, Llc | 0.22% | 175,311 | $130,277,110 | $149,684,038 | +$19,406,928 | +14.90% | |
| Bnp Paribas Financial Markets | 0.09% | 177,836 | $129,864,739 | $151,839,934 | +$21,975,195 | +16.92% | |
| American Century Companies Inc | 0.07% | 173,700 | $126,849,005 | $148,308,534 | +$21,459,529 | +16.92% | |
| Checkpoint Capital L.P. | 40.10% | 153,000 | $111,728,250 | $130,634,460 | +$18,906,210 | +16.92% | |
| Legal & General Group Plc | 0.03% | 150,850 | $110,158,233 | $128,798,747 | +$18,640,514 | +16.92% | |
| Deutsche Bank Ag\ | 0.03% | 139,381 | $101,782,976 | $119,006,285 | +$17,223,309 | +16.92% | |
| Bamco Inc | 0.31% | 138,648 | $101,247,702 | $118,380,435 | +$17,132,733 | +16.92% | |
| Orbimed Advisors Llc | 2.18% | 136,900 | $99,971,225 | $116,887,958 | +$16,916,733 | +16.92% | |
| Lazard Asset Management Llc | 0.16% | 133,347 | $97,376,683 | $113,854,336 | +$16,477,653 | +16.92% | |
| Bnp Paribas Asset Management Holding S.A. | 0.11% | 129,147 | $94,309,597 | $110,268,292 | +$15,958,695 | +16.92% | |
| Eventide Asset Management, Llc | 1.52% | 125,657 | $91,736,042 | $107,288,460 | +$15,552,418 | +16.95% | |
| Agf Management Ltd | 0.41% | 125,069 | $91,331,637 | $106,786,414 | +$15,454,777 | +16.92% | |
| Two Sigma Investments, Lp | 0.07% | 109,121 | $79,685,610 | $93,169,692 | +$13,484,082 | +16.92% | |
| First Trust Advisors Lp | 0.06% | 107,195 | $78,279,148 | $91,525,235 | +$13,246,087 | +16.92% | |
| Aberdeen Group Plc | 0.11% | 83,822 | $77,767,537 | $71,568,900 | -$6,198,637 | -7.97% | |
| Pinebridge Investments Llc | 0.64% | 103,812 | $75,808,713 | $88,636,762 | +$12,828,049 | +16.92% | |
| Rock Springs Capital Management Lp | 4.24% | 98,500 | $71,929,625 | $84,101,270 | +$12,171,645 | +16.92% | |
| Federated Hermes, Inc. | 0.11% | 95,253 | $69,558,503 | $81,328,916 | +$11,770,413 | +16.92% | |
| Adage Capital Partners Gp, L.L.C. | 0.10% | 90,000 | $65,722,500 | $76,843,800 | +$11,121,300 | +16.92% | |
| Bank Of Montreal | 0.03% | 85,333 | $62,314,424 | $72,859,022 | +$10,544,598 | +16.92% | |
| Braidwell Lp | 2.07% | 84,939 | $62,026,705 | $72,522,617 | +$10,495,912 | +16.92% | |
| 1832 Asset Management L.P. | 0.08% | 84,200 | $61,487,050 | $71,891,644 | +$10,404,594 | +16.92% | |
| Timessquare Capital Management, Llc | 1.03% | 83,117 | $60,696,189 | $70,966,957 | +$10,270,768 | +16.92% | |
| Td Asset Management Inc | 0.05% | 80,824 | $59,021,726 | $69,009,148 | +$9,987,422 | +16.92% | |
| Eagle Health Investments Lp | 11.70% | 76,336 | $55,744,364 | $65,177,204 | +$9,432,840 | +16.92% | |
| Public Sector Pension Investment Board | 0.17% | 73,300 | $53,527,325 | $62,585,006 | +$9,057,681 | +16.92% |
Frequently asked questions about ARGX
Who owns the most ARGX stock?
The largest holders of ARGX are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for ARGENX SE - ADR (ARGX).
Is ARGX widely held by superinvestors?
Many widely followed stocks like ARGX appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly ARGX is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.