Latest Period
Q1 2026
Security Snapshot
ARGENX SE - ADR (ARGX) Institutional Ownership
CUSIP: 04016X101
13F Institutional Holders and Ownership History from Q2 2017 to Q1 2026
Institutions Reporting
473
Shares (Excl. Options)
28,815,612
Price
$730.25
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- Security type / class
- Equity / ADR
- Symbol
- ARGX on Nasdaq
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 28,815,612
- Total 13F value
- $21,081,264,278
- Portfolio coverage rank
- 0.02%
- Share change
- -1,053,469
- Value change
- -$842,663,738
- Number of holders
- 473
- Shares outstanding
- 60,783,333
- SEC-reported price per share
- $808.43
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
2 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- ARGX - ARGENX SE - ADR is tracked under CUSIP 04016X101.
- 473 institutions reported positions in Q1 2026.
- 2 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 507 to 473 between Q4 2025 and Q1 2026.
- SEC-reported value moved from $24,999,817,828 to $21,081,264,278.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 473 institutions filings for Q1 2026.
Security key
04016X101
Latest holder period
Q1 2026
13F holders
473
13D/G owners
2
CIK / CUSIP context first
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 04016X101:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
2
Security
ARGX
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| PRICE T ROWE ASSOCIATES INC /MD/ | 6% | -28% | $2,689,881,320 | -$985,796,144 | 3,647,000 | -27% | T. Rowe Price Associates, Inc. | 30 Sep 2025 |
| Artisan Partners Limited Partnership | 3.8% | $1,316,438,506 | 2,349,776 | Artisan Partners Asset Management Inc. | 30 Jun 2025 |
As of 31 Mar 2026, 473 institutional investors reported holding 28,815,612 shares of ARGENX SE - ADR (ARGX). This represents 47% of the company’s total 60,783,333 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
38%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| FMR LLC | 8.2% | 4,991,034 | -11% | 0.19% | $3,644,702,751 |
| PRICE T ROWE ASSOCIATES INC /MD/ | 5.6% | 3,374,955 | +0.38% | 0.28% | $2,464,562,000 |
| JANUS HENDERSON GROUP PLC | 4.2% | 2,541,732 | +3.4% | 0.88% | $1,847,592,427 |
| Capital World Investors | 3.7% | 2,256,216 | +18% | 0.22% | $1,647,408,306 |
| Artisan Partners Limited Partnership | 2.4% | 1,467,982 | -16% | 1.7% | $1,071,993,495 |
| WELLINGTON MANAGEMENT GROUP LLP | 1.7% | 1,021,457 | +50% | 0.14% | $745,918,975 |
| Avoro Capital Advisors LLC | 1.6% | 1,000,000 | +1% | 7.2% | $730,250,000 |
| BlackRock, Inc. | 1.3% | 808,337 | +9.9% | 0.01% | $590,288,301 |
| RTW INVESTMENTS, LP | 1.2% | 709,446 | +5.3% | 5.2% | $518,072,942 |
| Invesco Ltd. | 0.98% | 594,697 | +43% | 0.07% | $434,277,485 |
| MORGAN STANLEY | 0.92% | 560,711 | +8.1% | 0.02% | $409,460,421 |
| ALLIANCEBERNSTEIN L.P. | 0.69% | 422,304 | +2% | 0.12% | $355,136,549 |
| BANK OF AMERICA CORP /DE/ | 0.66% | 400,117 | -0.16% | 0.02% | $292,185,476 |
| SANDS CAPITAL MANAGEMENT, LLC | 0.56% | 340,285 | -4.6% | 0.97% | $248,493,121 |
| Bellevue Group AG | 0.51% | 313,000 | -32% | 5.4% | $228,568,250 |
| SEI INVESTMENTS CO | 0.47% | 286,966 | -13% | 0.19% | $209,555,667 |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC | 0.44% | 266,067 | +19% | 0.64% | $194,364,029 |
| JENNISON ASSOCIATES LLC | 0.39% | 237,468 | +3.4% | 0.12% | $173,410,659 |
| FRANKLIN RESOURCES INC | 0.38% | 233,493 | -1.8% | 0.04% | $170,508,460 |
| GOLDMAN SACHS GROUP INC | 0.38% | 231,985 | +39% | 0.02% | $169,407,178 |
| Clearbridge Investments, LLC | 0.38% | 231,356 | -55% | 0.15% | $168,947,529 |
| CITADEL ADVISORS LLC | 0.36% | 219,126 | -38% | 0.11% | $160,016,761 |
| Fiera Capital Corp | 0.36% | 217,198 | -3.9% | 0.54% | $158,608,839 |
| AMERIPRISE FINANCIAL INC | 0.36% | 215,910 | +15% | 0.04% | $157,671,861 |
| BNP PARIBAS FINANCIAL MARKETS | 0.29% | 177,836 | 0% | 0.09% | $129,864,739 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
36
Latest
Q1 2026
Rows shown
1-25 of 36
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 28,815,612 | $21,081,264,278 | -$842,663,738 | $730.25 | 473 |
| 2025 Q4 | 29,739,916 | $24,999,817,828 | -$642,174,773 | $840.95 | 507 |
| 2025 Q3 | 30,517,541 | $22,513,715,603 | -$1,073,799,877 | $737.56 | 463 |
| 2025 Q2 | 32,113,379 | $17,700,251,639 | -$650,880,957 | $551.22 | 432 |
| 2025 Q1 | 33,350,566 | $19,728,647,418 | -$538,199,538 | $591.86 | 440 |
| 2024 Q4 | 34,127,043 | $20,989,465,522 | -$514,339,139 | $615.00 | 392 |
| 2024 Q3 | 35,023,889 | $18,983,773,082 | +$318,558,493 | $542.08 | 353 |
| 2024 Q2 | 34,272,091 | $14,739,068,000 | +$209,398,089 | $430.04 | 333 |
| 2024 Q1 | 33,972,829 | $13,375,733,075 | +$491,825,471 | $393.72 | 323 |
| 2023 Q4 | 32,743,580 | $12,457,326,565 | -$54,572,297 | $380.43 | 344 |
| 2023 Q3 | 32,304,467 | $15,882,569,669 | +$743,873,334 | $491.63 | 339 |
| 2023 Q2 | 30,837,175 | $12,017,706,842 | -$124,589,442 | $389.73 | 284 |
| 2023 Q1 | 31,161,539 | $11,606,411,682 | +$212,961,249 | $372.58 | 268 |
| 2022 Q4 | 30,636,859 | $11,606,887,640 | -$327,489,209 | $378.83 | 269 |
| 2022 Q3 | 31,719,850 | $11,203,694,460 | -$1,130,342,709 | $353.05 | 247 |
| 2022 Q2 | 32,849,679 | $12,441,524,780 | +$297,990,141 | $378.88 | 226 |
| 2022 Q1 | 32,214,227 | $10,157,335,912 | +$1,037,726,968 | $315.31 | 196 |
| 2021 Q4 | 28,919,142 | $10,126,721,772 | +$177,117,824 | $350.19 | 203 |
| 2021 Q3 | 28,383,120 | $8,571,126,445 | -$97,752,555 | $302.00 | 178 |
| 2021 Q2 | 28,455,441 | $8,567,827,463 | +$1,980,236 | $301.07 | 173 |
| 2021 Q1 | 28,512,399 | $7,852,287,235 | +$830,872,986 | $275.39 | 185 |
| 2020 Q4 | 25,489,136 | $7,496,328,068 | -$41,742,172 | $294.09 | 170 |
| 2020 Q3 | 25,619,531 | $6,725,637,706 | -$279,942,268 | $262.52 | 154 |
| 2020 Q2 | 26,726,537 | $6,038,628,842 | +$787,556,149 | $225.23 | 162 |
| 2020 Q1 | 23,348,647 | $3,076,234,326 | -$61,977,095 | $131.73 | 139 |