ARGX · Argenx SE · Holdings
Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.
Institutional Ownership Trend
Superinvestors Holding ARGX
All superinvestors →Holder Concentration
Across 512 13F filersWho Holds ARGX
Last 8 quarters through Sep 30, 2026 (filing window open)Each kind of 13F filer's share of the common shares 13F filers report. Holder type comes from regulatory records, never the filer's name; style, turnover and horizon are measured from each filer's own 13F book. The quarter selector does not change this card.
Jun 30, 2026, the newest closed quarter: 509 filers, like-for-like change -2.0%; actively managed books -2.3%; index-like books +1.6%.
| Holder type | Share | Filers | Change |
|---|---|---|---|
| Registered adviser | 35.6% | 280 | -6.8% |
| Exempt adviser | 0.1% | 3 | -50.8% |
| Adviser | 12.2% | 18 | -4.7% |
| Bank | 3.0% | 24 | +17.0% |
| Insurer | 0.0% | 1 | +0.3% |
| Broker-dealer | 0.1% | 2 | -20.2% |
| Non-US | 4.3% | 14 | +0.1% |
| Holding company | 28.8% | 11 | +2.1% |
| Benefit plan | 0.0% | 0 | — |
| Unknown | 15.9% | 156 | +1.7% |
| Style | Share | Filers | Change |
|---|---|---|---|
| Index-like | 8.0% | 27 | +1.6% |
| Systematic-like | 2.6% | 23 | +20.2% |
| Concentrated | 5.3% | 89 | -7.2% |
| Diversified active | 84.1% | 369 | -2.5% |
| Unknown | 0.0% | 1 | 0.0% |
| Not measured | 0.0% | 0 | — |
| Turnover | Share | Filers | Change |
|---|---|---|---|
| Low turnover | 54.0% | 307 | -4.5% |
| Medium turnover | 33.3% | 117 | +2.5% |
| High turnover | 3.3% | 47 | +10.0% |
| Unknown | 9.4% | 38 | -6.4% |
| Not measured | 0.0% | 0 | — |
| Holding horizon | Share | Filers | Change |
|---|---|---|---|
| Short horizon | 9.6% | 49 | -6.1% |
| Medium horizon | 6.3% | 106 | -1.9% |
| Long horizon | 82.2% | 323 | -2.1% |
| Unknown | 1.9% | 31 | +33.4% |
| Not measured | 0.0% | 0 | — |
| 13F book size | Share | Filers | Change |
|---|---|---|---|
| Under $1B | 1.4% | 136 | -15.9% |
| $1B to $10B | 3.9% | 174 | -10.7% |
| $10B to $100B | 23.2% | 125 | +3.8% |
| $100B or more | 71.5% | 74 | -2.9% |
| Not measured | 0.0% | 0 | — |
| Client base | Share | Filers | Change |
|---|---|---|---|
| Individuals and high net worth | 1.0% | 176 | +3.0% |
| Pooled investment vehicles | 11.1% | 44 | +0.3% |
| Registered funds and BDCs | 12.5% | 23 | -18.0% |
| Pension and profit sharing plans | 0.1% | 4 | -59.7% |
| Insurance companies | 0.0% | 2 | -9.4% |
| Charitable organizations | 0.0% | 2 | 0.0% |
| Governments and sovereign funds | 0.0% | 1 | -91.7% |
| Corporations | 0.0% | 2 | +7125.0% |
| Other investment advisers | 0.0% | 6 | -1.9% |
| Other | 0.0% | 1 | 0.0% |
| Diversified | 10.9% | 19 | +3.2% |
| Unknown | 64.4% | 229 | +0.9% |
| Private funds | Share | Filers | Change |
|---|---|---|---|
| Hedge funds | 13.9% | 56 | +2.0% |
| Private equity funds | 0.4% | 18 | +24.4% |
| Venture capital funds | 0.4% | 2 | 0.0% |
| Real estate funds | 0.0% | 6 | +41.6% |
| Securitized asset funds | 0.2% | 1 | +122.9% |
| Other private funds | 13.6% | 26 | -17.3% |
| Mixed private funds | 5.3% | 4 | -2.8% |
| Private funds, type not stated | 0.1% | 6 | -46.7% |
| No private funds | 1.7% | 164 | -3.2% |
| Unknown | 64.3% | 226 | +1.0% |
| Location | Share | Filers | Change |
|---|---|---|---|
| United States | 90.7% | 427 | -2.9% |
| Outside the US | 9.3% | 82 | +8.2% |
The Sep 30, 2026 filing window is still open, so its bar carries the Jun 30, 2026 positions of filers that have not filed yet.
How the mix is measured
Shares are 13F common shares restated to today's split basis; options and principal amounts are left out. The change compares only filers with a 13F in both quarters and keeps each filer in its bucket of the later quarter on both sides; a filer that continues under a new CIK is compared through its successor. Holder type comes from each filer's current regulatory profile; client base and private funds come from the Form ADV roster current at each quarter end (rosters from December 2019, so an earlier quarter reads Unknown). Style, turnover, horizon and book size are measured from each filer's 13F book in the newest measured quarter, and Not measured means none was. Actively managed books are those measured systematic-like, concentrated or diversified active.
Excluded 5 holders with no observed 2026-03-31 13F and 4 holders with no observed 2026-06-30 13F. Compared across CIK changes: JANUS HENDERSON GROUP PLC continues as Jupiter Topco LLC.
Conviction and Crowding
509 13F filers, quarter ended Jun 30, 2026Measured across every 13F filer's common-share book once the quarter's filing window closed. Crowding counts filers with high turnover or that advise private funds on Form ADV.
Managers in the top fifth by current three-year FundScore alpha were net sellers of $11,316,810 (0 buying, 1 selling).
Estimated Holder Cost Basis
Quarter ended Jun 30, 2026, on that quarter's share basisEstimated, never filed: each 13F buy is costed at its quarter's average traded price and each sale keeps the average cost, so this is what holders paid on average if they traded evenly through each quarter.
Estimated cost covers 19.9% of the 13F shares; positions already held when a filer's 13F history starts, or bought in a quarter without a trusted average price, have no estimate.
Shared Holders
Companies ARGX's active holders also own, quarter ended Jun 30, 2026| # | Company | Shared holders |
|---|---|---|
| 1 | ASND Ascendis Pharma A/S | 21 |
| 2 | BLTE Belite Bio, Inc | 9 |
| 3 | MDGL Madrigal Pharmaceuticals, Inc. | 14 |
| 4 | RVMD Revolution Medicines, Inc. | 23 |
| 5 | MIRM Mirum Pharmaceuticals, Inc. | 15 |
| 6 | SYRE Spyre Therapeutics, Inc. | 13 |
| 7 | INSM INSMED Inc | 18 |
| 8 | TNGX Tango Therapeutics, Inc. | 12 |
| 9 | GPCR Structure Therapeutics Inc. | 12 |
| 10 | CYTK Cytokinetics Inc | 16 |
Shareholder Targets
13F filers that own its peers but not ARGX, quarter ended Jun 30, 2026Found through its holder-overlap peers: ASND, BLTE, MDGL, RVMD, MIRM, SYRE, INSM, TNGX, GPCR, CYTK, IONS, IRTC, KYMR, DNTH, GH, KRYS, ALNY, ORKA, TARS, VERA. 1,145 filers in all.
| # | Filer | In peers | Largest peers |
|---|---|---|---|
| 1 | VANGUARD CAPITAL MANAGEMENT LLC Registered adviser, Index-like | $9,360,297,338 18 held | ALNY, RVMD, INSM |
| 2 | VANGUARD PORTFOLIO MANAGEMENT LLC Registered adviser, Diversified active | $8,944,417,190 18 held | ALNY, RVMD, INSM |
| 3 | T. Rowe Price Investment Management, Inc. Adviser, Diversified active | $6,902,381,474 11 held | ASND, ALNY, CYTK |
| 4 | BAKER BROS. ADVISORS LP Registered adviser, Concentrated | $5,627,378,549 10 held | RVMD, MDGL, KYMR |
| 5 | Darwin Global Management, Ltd. Exempt adviser, Concentrated | $3,150,289,230 3 held | RVMD, INSM, BLTE |
| 6 | FARALLON CAPITAL MANAGEMENT LLC Registered adviser, Diversified active | $2,969,911,760 3 held | RVMD, TNGX, GH |
| 7 | RA CAPITAL MANAGEMENT, L.P. Registered adviser, Concentrated | $2,927,524,725 3 held | ASND, ORKA, MIRM |
| 8 | Paradigm Biocapital Advisors LP Registered adviser, Concentrated | $2,585,577,527 8 held | RVMD, SYRE, ORKA |
| 9 | Capital International Investors Adviser, Diversified active | $2,180,158,232 6 held | INSM, ASND, GH |
| 10 | NORGES BANK Non-US, Index-like | $2,092,580,280 11 held | ALNY, RVMD, INSM |
Fund Ownership of ARGX by Fund Type
Registered funds' Form N-PORT reports for the quarter ended Jun 30, 2026Index funds and index ETFs hold 0.85% of shares outstanding.
| Fund type | Of shares outstanding | Shares |
|---|---|---|
| Index funds | 0.03% | 19,526 |
| Index ETFs | 0.82% | 518,029 |
| Active ETFs | 0.26% | 163,133 |
| Active funds | 17.96% | 11,295,859 |
| Unclassified | 0.20% | 124,053 |
| All registered funds | 19.27% | 12,120,600 |
How fund types are measured
Each fund series counts once, with its latest Form N-PORT report dated inside the quarter; only long share positions count, restated to today's split basis. The fund type is the series' latest Form N-CEN answer on or before the quarter end (the index-fund box and the exchange-traded flag), never its name. Unclassified funds have no usable N-CEN; unit investment trusts are among them, so index ownership is a floor. Funds sit inside their advisers' 13F reports, so these shares overlap the 13F figures and are never added to them.
| Holder | Value (USD) | % of 13F | Shares | Type | Filed | Open |
|---|---|---|---|---|---|---|
| Mega FMR LLC Holding company | $4,853,584,218 | 18.27% | 5,231,452 | Shares | 2026-08-13 | |
| Mega PRICE T ROWE ASSOCIATES INC /MD/ Registered adviser | $2,484,611,664 | 9.35% | 2,678,047 | Shares | 2026-08-14 | |
| Mega Jupiter Topco LLC | $2,295,316,893 | 8.64% | 2,474,015 | Shares | 2026-08-14 | |
| Mega Capital World Investors Adviser | $2,040,880,612 | 7.68% | 2,199,770 | Shares | 2026-08-12 | |
| Large Artisan Partners Limited Partnership Registered adviser | $1,399,798,965 | 5.27% | 1,508,778 | Shares | 2026-08-13 | |
| Large Avoro Capital Advisors LLC Registered adviser | $927,770,000 | 3.49% | 1,000,000 | Shares | 2026-08-14 | |
| Mega WELLINGTON MANAGEMENT GROUP LLP Holding company | $863,334,513 | 3.25% | 930,548 | Shares | 2026-08-14 | |
| Mega BlackRock, Inc. Holding company | $721,097,166 | 2.71% | 777,237 | Shares | 2026-08-07 | |
| Large RTW INVESTMENTS, LP Registered adviser | $658,202,715 | 2.48% | 709,446 | Shares | 2026-08-14 | |
| Mega MORGAN STANLEY Holding company | $596,670,219 | 2.25% | 643,123 | Shares | 2026-08-13 | |
| Mega Invesco Ltd. Adviser | $411,920,598 | 1.55% | 443,990 | Shares | 2026-08-14 | |
| Mega BANK OF AMERICA CORP /DE/ Bank | $371,325,094 | 1.40% | 400,234 | Shares | 2026-08-14 | |
| Mega ALLIANCEBERNSTEIN L.P. Registered adviser | $367,082,405 | 1.38% | 395,661 | Shares | 2026-08-14 | |
| Mid Bellevue Group AG Non-US | $279,258,770 | 1.05% | 301,000 | Shares | 2026-08-14 | |
| Large SANDS CAPITAL MANAGEMENT, LLC Registered adviser | $277,031,194 | 1.04% | 298,599 | Shares | 2026-08-13 | |
| Large BESSEMER GROUP INC | $248,437,315 | 0.94% | 267,779 | Shares | 2026-08-12 | |
| Large WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC Registered adviser | $245,503,714 | 0.92% | 264,617 | Shares | 2026-08-12 | |
| Mega SEI INVESTMENTS CO | $236,649,076 | 0.89% | 255,073 | Shares | 2026-08-14 | |
| Mega Clearbridge Investments, LLC Registered adviser | $235,445,759 | 0.89% | 253,776 | Shares | 2026-08-13 | |
| Mega JENNISON ASSOCIATES LLC Registered adviser | $209,861,574 | 0.79% | 226,200 | Shares | 2026-08-03 | |
| Mega FRANKLIN RESOURCES INC Adviser | $208,683,303 | 0.79% | 224,930 | Shares | 2026-08-13 | |
| Mega CITADEL ADVISORS LLC Registered adviser | $197,073,191 | 0.74% | 212,416 | Shares | 2026-09-02 | |
| Mega Pictet Asset Management Holding SA | $183,960,091 | 0.69% | 198,282 | Shares | 2026-07-30 | |
| Mega TWO SIGMA INVESTMENTS, LP Registered adviser | $172,229,367 | 0.65% | 185,638 | Shares | 2026-08-14 | |
| Mega AMERIPRISE FINANCIAL INC Adviser | $168,356,853 | 0.63% | 181,464 | Shares | 2026-08-14 | |
| Mega GOLDMAN SACHS GROUP INC Holding company | $165,000,182 | 0.62% | 177,846 | Shares | 2026-08-14 | |
| Mega Legal & General Group Plc | $164,367,443 | 0.62% | 177,164 | Shares | 2026-08-14 | |
| Mega AMERICAN CENTURY COMPANIES INC | $160,683,269 | 0.60% | 173,193 | Shares | 2026-08-12 | |
| Large Allspring Global Investments Holdings, LLC Holding company | $158,490,019 | 0.60% | 170,829 | Shares | 2026-08-13 | |
| Mega BNP PARIBAS ARBITRAGE, SA Non-US | $146,548,693 | 0.55% | 157,958 | Shares | 2026-08-13 | |
| Large 1832 Asset Management L.P. Non-US | $146,531,993 | 0.55% | 157,940 | Shares | 2026-08-13 | |
| Mega DEUTSCHE BANK AG\ Non-US | $127,415,291 | 0.48% | 137,335 | Shares | 2026-08-07 | |
| Large BAMCO INC /NY/ Registered adviser | $126,783,481 | 0.48% | 136,654 | Shares | 2026-08-14 | |
| Mega BARCLAYS PLC Bank | $124,717,337 | 0.47% | 134,427 | Shares | 2026-08-14 | |
| Large LAZARD ASSET MANAGEMENT LLC Adviser | $122,461,928 | 0.46% | 131,996 | Shares | 2026-08-14 | |
| Small Checkpoint Capital L.P. Registered adviser | $121,800,428 | 0.46% | 131,283 | Shares | 2026-08-14 | |
| Mid EVENTIDE ASSET MANAGEMENT, LLC Registered adviser | $116,591,000 | 0.44% | 125,668 | Shares | 2026-08-14 | |
| Large AGF MANAGEMENT LTD | $116,417,507 | 0.44% | 125,481 | Shares | 2026-08-10 | |
| Large BNP PARIBAS ASSET MANAGEMENT Holding S.A. Non-US | $112,989,396 | 0.43% | 121,786 | Shares | 2026-08-13 | |
| Large LORD, ABBETT & CO. LLC Registered adviser | $100,433,885 | 0.38% | 108,253 | Shares | 2026-08-14 | |
| Mega FIRST TRUST ADVISORS LP Registered adviser | $94,112,988 | 0.35% | 101,440 | Shares | 2026-08-11 | |
| Mid PGGM Investments | $89,540,010 | 0.34% | 96,511 | Shares | 2026-08-12 | |
| Mega MILLENNIUM MANAGEMENT LLC Registered adviser | $87,582,415 | 0.33% | 94,401 | Shares | 2026-08-14 | |
| Mid ORBIMED ADVISORS LLC Registered adviser | $86,171,277 | 0.32% | 92,880 | Shares | 2026-08-14 | |
| Large Fiera Capital Corp Non-US | $83,891,746 | 0.32% | 90,423 | Shares | 2026-08-07 | |
| Mega Capital Research Global Investors Adviser | $82,117,850 | 0.31% | 88,511 | Shares | 2026-08-12 | |
| Large FEDERATED HERMES, INC. Adviser | $80,983,187 | 0.30% | 87,288 | Shares | 2026-08-12 | |
| Large PINEBRIDGE INVESTMENTS LLC Registered adviser | $80,762,378 | 0.30% | 87,050 | Shares | 2026-08-14 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $78,860,450 | 0.30% | 85,000 | Put | 2026-08-14 | |
| Large Public Sector Pension Investment Board Non-US | $78,211,011 | 0.29% | 84,300 | Shares | 2026-08-13 | |
| Large Aberdeen Group plc Holding company | $77,767,536 | 0.29% | 83,822 | Shares | 2026-07-31 | |
| Mid TimesSquare Capital Management, LLC Registered adviser | $77,110,675 | 0.29% | 83,114 | Shares | 2026-08-07 | |
| Large Candriam S.C.A. Registered adviser | $74,332,932 | 0.28% | 80,120 | Shares | 2026-08-13 | |
| Mega BANK OF MONTREAL /CAN/ Bank | $71,635,902 | 0.27% | 77,213 | Shares | 2026-08-12 | |
| Small Eagle Health Investments LP Registered adviser | $70,897,400 | 0.27% | 76,417 | Shares | 2026-08-10 | |
| Mega Nuveen, LLC | $68,773,734 | 0.26% | 74,128 | Shares | 2026-08-11 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $66,150,001 | 0.25% | 71,300 | Call | 2026-08-14 | |
| Mega Amundi Holding company | $60,418,237 | 0.23% | 65,122 | Shares | 2026-08-11 | |
| Mega NORTHERN TRUST CORP Bank | $57,724,920 | 0.22% | 62,219 | Shares | 2026-08-13 | |
| Mega UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC Registered adviser | $56,883,432 | 0.21% | 61,312 | Shares | 2026-08-13 | |
| Mega CANADA PENSION PLAN INVESTMENT BOARD Non-US | $56,201,523 | 0.21% | 60,577 | Shares | 2026-08-14 | |
| Large Squarepoint Ops LLC Registered adviser | $54,181,768 | 0.20% | 58,400 | Shares | 2026-08-14 | |
| Mega D. E. Shaw & Co., Inc. | $54,088,991 | 0.20% | 58,300 | Call | 2026-08-14 | |
| Large NOMURA ASSET MANAGEMENT INTERNATIONAL INC. Adviser | $54,058,374 | 0.20% | 58,267 | Shares | 2026-08-14 | |
| Large USS Investment Management Ltd | $53,720,666 | 0.20% | 57,903 | Shares | 2026-08-11 | |
| Large WESTFIELD CAPITAL MANAGEMENT CO LP Registered adviser | $52,958,967 | 0.20% | 57,082 | Shares | 2026-08-12 | |
| Mega ENVESTNET ASSET MANAGEMENT INC Registered adviser | $51,348,358 | 0.19% | 55,346 | Shares | 2026-09-23 | |
| Large Woodline Partners LP Registered adviser | $51,050,544 | 0.19% | 55,025 | Shares | 2026-08-14 | |
| Mid Rock Springs Capital Management LP Registered adviser | $48,939,867 | 0.18% | 52,750 | Shares | 2026-08-14 | |
| Large Handelsbanken Fonder AB Non-US | $48,849,873 | 0.18% | 52,653 | Shares | 2026-07-10 | |
| Large Ensign Peak Advisors, Inc | $48,269,089 | 0.18% | 52,027 | Shares | 2026-08-14 | |
| Large ADAGE CAPITAL PARTNERS GP, L.L.C. Registered adviser | $46,951,656 | 0.18% | 50,607 | Shares | 2026-08-14 | |
| Large NOMURA ASSET MANAGEMENT CO LTD Registered adviser | $45,626,799 | 0.17% | 49,179 | Shares | 2026-08-13 | |
| Large Jefferies Financial Group Inc. Holding company | $41,812,738 | 0.16% | 45,068 | Shares | 2026-08-17 | |
| Mega DIMENSIONAL FUND ADVISORS LP Registered adviser | $41,200,407 | 0.16% | 44,408 | Shares | 2026-08-11 | |
| Small Tri Locum Partners LP Registered adviser | $38,591,520 | 0.15% | 41,596 | Shares | 2026-08-14 | |
| Mega ARROWSTREET CAPITAL, LIMITED PARTNERSHIP Registered adviser | $37,168,321 | 0.14% | 40,062 | Shares | 2026-08-13 | |
| Large Point72 Asset Management, L.P. Registered adviser | $37,095,027 | 0.14% | 39,983 | Shares | 2026-08-14 | |
| Large Assenagon Asset Management S.A. | $34,920,625 | 0.13% | 36,417 | Shares | 2026-10-15 | |
| Mega CITADEL ADVISORS LLC Registered adviser | $34,049,159 | 0.13% | 36,700 | Call | 2026-09-02 | |
| Mega UBS Group AG Bank | $33,940,609 | 0.13% | 36,583 | Shares | 2026-08-13 | |
| Mega JANE STREET GROUP, LLC | $32,843,058 | 0.12% | 35,400 | Call | 2026-08-14 | |
| Mega RAYMOND JAMES FINANCIAL INC | $32,246,500 | 0.12% | 34,757 | Shares | 2026-08-14 | |
| Mega WELLS FARGO & COMPANY/MN Bank | $31,964,458 | 0.12% | 34,453 | Shares | 2026-08-14 | |
| Mega VICTORY CAPITAL MANAGEMENT INC Registered adviser | $28,635,621 | 0.11% | 30,865 | Shares | 2026-08-07 | |
| Large Mediolanum International Funds Ltd | $27,633,629 | 0.10% | 29,785 | Shares | 2026-07-23 | |
| Small Artia Global Partners LP Registered adviser | $27,590,952 | 0.10% | 29,739 | Shares | 2026-08-14 | |
| Mid PEREGRINE CAPITAL MANAGEMENT LLC Registered adviser | $27,584,457 | 0.10% | 29,732 | Shares | 2026-07-17 | |
| Mid Perpetual Ltd Adviser | $26,874,411 | 0.10% | 28,026 | Shares | 2026-10-13 | |
| Mega ROYAL BANK OF CANADA Bank | $26,498,963 | 0.10% | 28,562 | Shares | 2026-08-14 | |
| Large BLAIR WILLIAM & CO/IL Registered adviser | $25,667,684 | 0.10% | 27,666 | Shares | 2026-08-11 | |
| Mid ODDO BHF ASSET MANAGEMENT SAS | $23,202,599 | 0.09% | 25,009 | Shares | 2026-08-13 | |
| Mega TD Asset Management Inc | $22,892,724 | 0.09% | 24,675 | Shares | 2026-08-04 | |
| Mega CITADEL ADVISORS LLC Registered adviser | $22,452,034 | 0.08% | 24,200 | Put | 2026-09-02 | |
| Mega GEODE CAPITAL MANAGEMENT, LLC Registered adviser | $22,137,519 | 0.08% | 23,861 | Shares | 2026-08-12 | |
| Small Patient Square Capital LP | $21,338,710 | 0.08% | 23,000 | Shares | 2026-08-12 | |
| Large Life Cycle Investment Partners Ltd Registered adviser | $20,865,547 | 0.08% | 22,490 | Shares | 2026-08-13 | |
| Mega VAN ECK ASSOCIATES CORP Registered adviser | $20,589,999 | 0.08% | 22,193 | Shares | 2026-08-14 | |
| Large NEW YORK STATE COMMON RETIREMENT FUND | $20,487,017 | 0.08% | 22,082 | Shares | 2026-07-29 | |
| Large LMR Partners LLP Exempt adviser | $18,926,508 | 0.07% | 20,400 | Call | 2026-08-14 |
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