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AMGN · ARGX in the 13F filings

Two to four stocks side by side among the 95 tracked managers: who lists them, how that has moved, who bought and sold in a quarter, and which managers hold more than one.

AMGNARGX
Quarter
Q2 2026Q1 2026Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q4 2023

Holders over time

Tracked managers listing each stock every quarter, at least, or their combined reported value. A gap is a quarter in which no tracked manager listed it. Click a quarter to compare there.
  • AMGN
  • ARGX
0102030202120222023202420252026
Holders and value by quarter
QuarterAMGNARGX
Q3 202016 holders, $16.3bn8 holders, $3.6bn
Q4 202019 holders, $14.0bn7 holders, $4.1bn
Q1 202116 holders, $14.5bn8 holders, $4.1bn
Q2 202123 holders, $13.8bn9 holders, $4.6bn
Q3 202124 holders, $11.6bn8 holders, $4.5bn
Q4 202121 holders, $10.4bn9 holders, $5.3bn
Q1 202223 holders, $9.9bn8 holders, $5.3bn
Q2 202228 holders, $9.7bn13 holders, $6.5bn
Q3 202221 holders, $7.9bn14 holders, $5.3bn
Q4 202224 holders, $9.3bn13 holders, $5.5bn
Q1 202322 holders, $8.4bn13 holders, $5.9bn
Q2 202326 holders, $7.4bn18 holders, $6.6bn
Q3 202326 holders, $8.7bn21 holders, $8.7bn
Q4 202324 holders, $8.4bn17 holders, $6.3bn
Q1 202425 holders, $6.7bn13 holders, $6.8bn
Q2 202420 holders, $8.0bn14 holders, $7.9bn
Q3 202421 holders, $8.8bn13 holders, $10.7bn
Q4 202420 holders, $8.2bn14 holders, $12.3bn
Q1 202525 holders, $12.0bn17 holders, $11.8bn
Q2 202520 holders, $10.2bn18 holders, $10.8bn
Q3 202517 holders, $10.4bn16 holders, $13.8bn
Q4 202519 holders, $18.0bn16 holders, $14.8bn
Q1 202615 holders, $21.4bn11 holders, $12.3bn
Q2 202623 holders, $24.9bn14 holders, $15.0bn
AMGN

Amgen Inc

Holders
20
Reported value
$10.2bn
Buyers
13
Sellers
8

Breadth +5 among 95 comparable managers.

Pharmaceuticals and biotechnologyBiological productsHealthcare: biopharma and medtech · L3VLUP
ARGX

Argenx Se

Holders
18
Reported value
$10.8bn
Buyers
8
Sellers
9

Breadth -1 among 95 comparable managers.

Pharmaceuticals and biotechnologyBiological productsHealthcare: biopharma and medtech · L3VLUP

Who holds both, Q2 2025

Among the 32 tracked managers listing any of them. "Only" is about listed positions: a manager may hold the other below its listed range.

Only AMGN (14)

Acadian Asset Management LLC, AllianceBernstein LP, AQR Capital Management LLC, ARK Investment Management LLC, Arrowstreet Capital LP, Brevan Howard Capital Management LP, Bridgewater Associates LP, Capital Research Global Investors, Dodge & Cox, Invesco Ltd, Man Group PLC, Neuberger Berman Group LLC, Renaissance Technologies LLC, Tudor Investment Corp

Only ARGX (12)

Artisan Partners LP, Balyasny Asset Management LLC, Citadel Advisors LLC, Holocene Advisors LP, Hudson Bay Capital Management LP, Marshall Wace LLP, Millennium Management LLC, Moore Capital Management LP, Two Sigma Investments LP, Verition Fund Management LLC, Voloridge Investment Management LLC, Wellington Management Group LLP

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. Buyers and sellers count comparable managers (those that filed both quarters) by shares, so a rise in value with no rise in shares is the price. Large books are listed to their largest positions. These are 95 tracked managers, not the institutional market.

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