Comparable stake leader
FMR LLC
SEC ownership of ARGENX SE
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001697862.
Disclosed value leader
PRICE T ROWE ASSOCIATES INC /MD/
Comparable rows
3/50
Latest evidence
30 Sep 2026
- Public ticker
- ARGX on Nasdaq
- Parsed ownership sources
-
13D/G and 13F
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
FMR LLC
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
3 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
FMR LLC
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
30 Sep 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001697862
- Issuer location
- Zwijnaarde
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of ARGENX SE (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
FMR LLC
Disclosed value leader
PRICE T ROWE ASSOCIATES I...
Comparable rows
3/50
Latest evidence
30 Sep 2026
13D/G
13F
Lead comparable stake: 9.9%
47 rows are not safely comparable across share classes.
13D/G row: FMR LLC
Showing 1-8 of 50 holder rows.
Quick read
FMR LLC leads the comparable SEC ownership view at 9.9%.
3 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens FMR LLC's linked filing trail.
Comparable ownership
Top 3
FMR LLC
9.9%
PRICE T ROWE ASSOCIATES INC /MD/
4.3%
Artisan Partners Limited Partnership
3.8%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| FMR LLC |
13D/G
|
9.9%
Reported 13D/G
· 30 Sep 2026
|
—
6,178,792 shares
|
$0 | 30 Sep 2026 |
| PRICE T ROWE ASSOCIATES INC /MD/ |
13D/G
T. Rowe Price Associates, Inc.
|
4.3%
Reported 13D/G
· 30 Jun 2026
|
$2,433,301,387
2,675,457 shares
|
-$883,608,643 | 30 Jun 2026 |
| Artisan Partners Limited Partnership |
13D/G
13F
Artisan Partners Asset Management Inc. · Company
|
3.8%
Reported 13D/G
· 30 Jun 2025
|
$1,316,438,506
2,349,776 shares
|
$0 | 30 Jun 2025 |
| Capital World Investors |
13F
Company
|
—
denominator unverified
|
$2,185,633,912
2,279,203 shares
|
— | 30 Sep 2026 |
| MORGAN STANLEY |
13F
Company
|
—
denominator unverified
|
$562,428,821
586,527 shares
|
— | 30 Sep 2026 |
| Invesco Ltd. |
13F
Company
|
—
denominator unverified
|
$401,819,883
419,038 shares
|
— | 30 Sep 2026 |
| SANDS CAPITAL MANAGEMENT, LLC |
13F
Company
|
—
denominator unverified
|
$259,103,235
270,206 shares
|
— | 30 Sep 2026 |
| FRANKLIN TEMPLETON INC |
13F
Company
|
—
denominator unverified
|
$246,983,348
265,180 shares
|
— | 30 Sep 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
No eligible buy or sell activity is available for this window. No eligible Buy or Sell transactions are available in this dataset since 15 Nov 2025.
Buys
$0
Insiders: 0
Sells
$0
Insiders: 0
Net
$0
Shares: 0
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 0
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
Recent insider transactions for ARGENX SE
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| No insider transactions were found in the last 12 months for this issuer. | ||||||||||
* marks a reported price that did not pass the local price check.