argenx SE - Depositary Receipt (Common Stock)
US ˙ NasdaqGS ˙ US04016X1019

SecurityARGX / argenx SE - Depositary Receipt (Common Stock)
InstitutionCandriam Luxembourg S.C.A.
Latest Disclosed Ownership54,148 shares
Latest Disclosed Value $ 39,541,577
Candriam Luxembourg S.C.A. reports 11.09% increase in ownership of ARGX / argenx SE - Depositary Receipt (Common Stock)

On April 30, 2026 - Candriam Luxembourg S.C.A. filed a 13F-HR form disclosing ownership of 54,148 shares of argenx SE - Depositary Receipt (Common Stock) (US:ARGX) valued at $39,541,577 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on April 30, 2026 disclosing 48,741 shares of argenx SE - Depositary Receipt (Common Stock). This represents a change in shares of 11.09% during the quarter. The current value of the position is $48,263,195 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date
Effective
Date
Form Security Class ID Avg Price
Paid (Est)
Reported
Shares
ΔShares ΔShares
(%)
Reported
Value
(x1000)
ΔValue
(%)
Alloc
(%)
ΔAlloc ΔAlloc (%) Cost Basis
(x1000)
Unrealized
Gain/Loss
(x1000)
2026-04-30 2026-03-31 13F ARGENX SE SPONSORED ADR 04016X101 54,148 5,407 11.09 39,542 -3.54 0.2054
2026-04-30 2025-12-31 13F/A-1 ARGENX SE SPONSORED ADR 04016X101 48,741 541 1.12 40,990 15.30 0.2044
2026-02-13 2025-12-31 13F ARGENX SE SPONSORED ADR 04016X101 48,741 541 40,990 0.2041
2025-11-06 2025-09-30 13F ARGENX SE SPONSORED ADR 04016X101 48,200 2,633 5.78 35,550 41.53 0.1861
2025-08-08 2025-06-30 13F ARGENX SE SPONSORED ADR 04016X101 45,567 4,287 10.39 25,119 2.81 0.1448
2025-05-14 2025-03-31 13F ARGENX SE SPONSORED ADR 04016X101 41,280 -6,930 -14.37 24,432 -17.60 0.1530
2025-02-07 2024-12-31 13F ARGENX SE SPONSORED ADR 04016X101 48,210 -3,208 -6.24 29,649 6.38 0.1707
2024-11-13 2024-09-30 13F ARGENX SE SPONSORED ADR 04016X101 51,418 0 0.00 27,871 26.06 0.1602
2024-08-05 2024-06-30 13F ARGENX SE SPONSORED ADR 04016X101 51,418 13,265 34.77 22,111 47.19 0.1340
2024-05-06 2024-03-31 13F ARGENX SE SPONSORED ADR 04016X101 38,153 38,153 15,022 0.0961
2022-02-10 2021-12-31 13F ARGENX SE SPONSORED ADR 04016X101 0 -49,526 -100.00 0 -100.00
2021-11-09 2021-09-30 13F ARGENX SE SPONSORED ADR 04016X101 49,526 0 0.00 14,956 0.30 0.1017
2021-07-20 2021-06-30 13F ARGENX SE SPONSORED ADR 04016X101 49,526 10,753 27.73 14,911 36.14 0.1021
2021-04-29 2021-03-31 13F ARGENX SE SPONSORED ADR 04016X101 38,773 -4 -0.01 10,953 -3.95 0.0912
2021-01-22 2020-12-31 13F ARGENX SE SPONSORED ADR 04016X101 38,777 -246 -0.63 11,404 11.32 0.0902
2020-10-19 2020-09-30 13F ARGENX SE SPONSORED ADR 04016X101 39,023 -20,884 -34.86 10,244 -24.08 0.0962
2020-07-23 2020-06-30 13F ARGENX SE SPONSORED ADR 04016X101 59,907 51,586 619.95 13,493 933.95 0.1424
2020-05-26 2020-03-31 13F ARGENX SE SPONSORED ADR 04016X101 8,321 9 0.11 1,305 -2.17 0.0145
2020-02-05 2019-12-31 13F/A-1 ARGENX SE SPONSORED ADR 04016X101 8,312 8,312 1,334 0.0143
2020-01-21 2019-12-31 13F ARGENX SE SPONSORED ADR 04016X101 8,312 1
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.