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ARGX in the 13F filings

Argenx Se · CUSIP 04016X101

Sector · Pharmaceuticals and biotechnologyTheme · Biological productsTheme · Healthcare: biopharma and medtech· L3VLUP-defined
Quarter
Q3 2026 · early filersQ2 2026Q1 2026Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q4 2023
Quarter end
30 Jun 2026
the date the book describes
Filed
27 Oct 2026
latest of these filings; the earliest 3 Aug 2026
Managers listing it
29
at least, of 95 tracked, among listed positions
Comparable managers
91
filed both Q1 2026 and Q2 2026; 11 listed it in both
Shares listed
16,686,120
combined, among listed positions
Reported value
$15.4bn
combined, at the quarter end

AllianceBernstein LP. Values in this filing are at the previous quarter end's prices; its share count is the quarter end's.

Among the 91 comparable managers: 16 buyers (opened or added shares) and 15 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was -580,262.

Managers listing ARGX in Q2 2026

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q1 2026, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

29 of 29 holders

ActionFiling
Fidelity (FMR LLC)5,231,452$4.9bn0.21%Added+240,41813 Aug 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc2,678,047$2.5bn0.25%Trimmed-696,90814 Aug 2026 (the filing on sec.gov)
Janus Henderson Group Ltd2,474,015$2.3bn0.94%Trimmed-67,71714 Aug 2026 (the filing on sec.gov)
Capital World Investors2,199,770$2.0bn0.24%Trimmed-56,44612 Aug 2026 (the filing on sec.gov)
Artisan Partners LP1,508,778$1.4bn2.22%Added+40,79613 Aug 2026 (the filing on sec.gov)
Wellington Management Group LLP930,548$863m0.15%Trimmed-90,90914 Aug 2026 (the filing on sec.gov)
Invesco Ltd443,990$412munder 0.1%Trimmed-150,70714 Aug 2026 (the filing on sec.gov)
AllianceBernstein LP395,661$289m0.10%Trimmed-26,64314 Aug 2026 (the filing on sec.gov)
Citadel Advisors LLC212,416$197munder 0.1%Trimmed-6,7102 Sep 2026 (the filing on sec.gov)
Two Sigma Investments LP185,638$172m0.12%Added+76,51714 Aug 2026 (the filing on sec.gov)
Millennium Management LLC94,401$88munder 0.1%Added+22,03614 Aug 2026 (the filing on sec.gov)
Capital Research Global Investors88,511$82munder 0.1%Newnew12 Aug 2026 (the filing on sec.gov)
Squarepoint Ops LLC58,400$54m0.06%Added+39,72114 Aug 2026 (the filing on sec.gov)
Woodline Partners LP55,025$51m0.16%Newnew14 Aug 2026 (the filing on sec.gov)
Arrowstreet Capital LP40,062$37munder 0.1%Newnew13 Aug 2026 (the filing on sec.gov)
Point72 Asset Management LP39,983$37munder 0.1%Newnew14 Aug 2026 (the filing on sec.gov)
Voloridge Investment Management LLC18,797$17m0.07%Trimmed-3,85414 Aug 2026 (the filing on sec.gov)
AQR Capital Management LLC10,668$9.9munder 0.1%Added+8,13814 Aug 2026 (the filing on sec.gov)
D. E. Shaw & Co.8,263$7.7munder 0.1%Trimmed-43,85914 Aug 2026 (the filing on sec.gov)
Hudson Bay Capital Management LP5,000$4.6munder 0.1%Trimmed-25,00014 Aug 2026 (the filing on sec.gov)
Bridgewater Associates LP1,958$1.8munder 0.1%Added+74414 Aug 2026 (the filing on sec.gov)
Neuberger Berman Group LLC1,942$1.8munder 0.1%Added+49727 Oct 2026 (the filing on sec.gov)
Verition Fund Management LLC1,000$928kunder 0.1%Newnew14 Aug 2026 (the filing on sec.gov)
Winton Group Ltd480$445kunder 0.1%Trimmed-2807 Aug 2026 (the filing on sec.gov)
Susquehanna International Group LLP474$440kunder 0.1%Trimmed-13,91814 Aug 2026 (the filing on sec.gov)
Page 1 of 2

Largest increases and reductions, by shares

Q1 2026 to Q2 2026, among managers that listed it in both quarters or opened it.

Increases

Reductions

New positions and exits

At least these many: a manager is shown exiting only where its own filing shows the position gone.

New (8)

Exited (2)

Ownership over time

Every quarter on file. A quarter-end value moves with the price as well as with the shares held; buyers and sellers count comparable managers, by shares.
13 in Q3 2024 to 14 in Q2 2026

Tracked managers listing it, at least.

0102030201820192020202120222023202420252026
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
ARGX by quarter
QuarterHoldersReported valueBuyersSellers
Q4 20171$1.3mn.a.n.a.
Q1 20182$72mn.a.n.a.
Q2 20181$704kn.a.n.a.
Q3 20182$19mn.a.n.a.
Q4 20184$569mn.a.n.a.
Q1 20195$1.0bnn.a.n.a.
Q2 20196$1.3bnn.a.n.a.
Q3 20196$1.1bnn.a.n.a.
Q4 20196$1.7bnn.a.n.a.
Q1 20206$1.4bnn.a.n.a.
Q2 20209$3.0bnn.a.n.a.
Q3 20208$3.6bnn.a.n.a.
Q4 20207$4.1bnn.a.n.a.
Q1 20218$4.1bnn.a.n.a.
Q2 20219$4.6bnn.a.n.a.
Q3 20218$4.5bnn.a.n.a.
Q4 20219$5.3bnn.a.n.a.
Q1 20228$5.3bnn.a.n.a.
Q2 202213$6.5bnn.a.n.a.
Q3 202214$5.3bnn.a.n.a.
Q4 202213$5.5bnn.a.n.a.
Q1 202313$5.9bnn.a.n.a.
Q2 202318$6.6bnn.a.n.a.
Q3 202321$8.7bnn.a.n.a.
Q4 202317$6.3bn126
Q1 202413$6.8bn68
Q2 202414$7.9bn97
Q3 202413$10.7bn77
Q4 202414$12.3bn86
Q1 202517$11.8bn99
Q2 202518$10.8bn89
Q3 202516$13.8bn107
Q4 202516$14.8bn1416
Q1 202611$12.3bn1514
Q2 202614$15.0bn1615

Compare with…

Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.

ARGX and GILD →ARGX and AMGN →ARGX and RVMD →Choose a stock to compare with ARGX →

How much of the picture this is

A 13F is a manager’s long US-listed equity book at a quarter end, filed up to 45 days later. It shows no shorts, cash, bonds or performance, and it is never today’s portfolio. Large books are listed to their largest positions, so a manager missing from this table may still hold a small position below that line. These are 95 tracked managers, not the institutional market.

Which funds own ARGX, latest filings →Back to the 13F Explorer →