Ticker · CUSIP 04016X101

ARGX

ADR
ARGENX SE
Healthcare·Biotechnology
···Share
Holders (tracked)
16
Combined shares
5,411,396
Combined value
$1.73B
Last close
—
Quarter
2025Q4
Tracked holders · last 8 quarters
+3 vs previous quarter over the last 8.
16132024Q12025Q4

SEC event timeline

19 events
  1. Ken Griffin (Citadel Advisors) trimmed2026-02-17
    −362,708 shares · 2025Q4
    13F
  2. D.E. Shaw & Co. trimmed2026-02-17
    −123,495 shares · 2025Q4
    13F
  3. Two Sigma Investments trimmed2026-02-17
    −35,604 shares · 2025Q4
    13F
  4. Izzy Englander (Millennium Mgmt) trimmed2026-02-17
    −287,060 shares · 2025Q4
    13F
  5. Steve Cohen (Point72) opened position2026-02-17
    +9,500 shares · 2025Q4
    13F
  6. T. Rowe Price trimmed2026-02-17
    −278,085 shares · 2025Q4
    13F
  7. Paul Tudor Jones (Tudor Investment) opened position2026-02-17
    +2,148 shares · 2025Q4
    13F
  8. Wellington Management trimmed2026-02-17
    −50,750 shares · 2025Q4
    13F
  9. Ron Baron (Baron Capital / BAMCO) trimmed2026-02-17
    −13,975 shares · 2025Q4
    13F
  10. AQR Capital Management added2026-02-17
    +469 shares · 2025Q4
    13F
  11. Sands Capital Management added2026-02-13
    +340,245 shares · 2025Q4
    13F
  12. AQR Capital Management added2025-11-14
    +920 shares · 2025Q3
    13F
  13. Izzy Englander (Millennium Mgmt) trimmed2025-11-14
    −82,326 shares · 2025Q3
    13F
  14. Two Sigma Investments added2025-11-14
    +250,278 shares · 2025Q3
    13F
  15. D.E. Shaw & Co. added2025-11-14
    +31,064 shares · 2025Q3
    13F
  16. T. Rowe Price trimmed2025-11-14
    −1,339,567 shares · 2025Q3
    13F
  17. Wellington Management added2025-11-14
    +324,653 shares · 2025Q3
    13F
  18. Ron Baron (Baron Capital / BAMCO) trimmed2025-11-14
    −13,039 shares · 2025Q3
    13F
  19. Sands Capital Management opened position2025-11-13
    +16,625 shares · 2025Q3
    13F

Insider activity

No insider transactions in the last 30 days.
View full insider history for ARGX →

Who moved on this name in 2025Q4

13F transactions reported for the latest quarter, grouped by direction.
New positions2
Added to2
Trimmed7
Exited0
—

Institutional ownership over time

Distinct super-investors holding this ticker · combined dollar value, by quarter.
QuarterHoldersCombined value
2022Q1
10
$2.73B
2022Q2
12
$3.25B
2022Q3
11
$2.3M
2022Q4
12
$679.0M
2023Q1
11
$562.0M
2023Q2
12
$764.4M
2023Q3
13
$1.26B
2023Q4
11
$855.3M
2024Q1
13
$795.0M
2024Q2
14
$1.15B
2024Q3
12
$913.8M
2024Q4
10
$828.7M
2025Q1
12
$1.11B
2025Q2
12
$1.20B
2025Q3
13
$1.91B
2025Q4
16
$1.73B

Who owns ARGX

16 super-investors · 2025Q4
Tracked stake
5.41M
shares
Combined value
$1.73B
% of shares outstanding
—
shares-out unknown
Quarter action mix
New3Added2Trim11
#ManagerSharesValue
1Wellington Management679.2K$571M
2Sands Capital Management356.9K$300M
3Ken Griffin
Citadel Advisors
350.9K$295M
4Two Sigma Investments258.6K$217M
5Ron Baron
Baron Capital / BAMCO
153.7K$129M
6D.E. Shaw & Co.75.5K$63M
7Izzy Englander
Millennium Mgmt
60.5K$51M
8D.E. Shaw & Co.45.5K$38M
9Ken Griffin
Citadel Advisors
26.6K$22M
10Ken Griffin
Citadel Advisors
24.1K$20M
11Steve Cohen
Point72
5.0K$4M
12Steve Cohen
Point72
4.5K$4M
13D.E. Shaw & Co.3.6K$3M
14T. Rowe Price3.36M$3M
15AQR Capital Management2.4K$2M
16Paul Tudor Jones
Tudor Investment
2.1K$2M

Recent moves

20 transactions
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