ARGENX SE (ARGX): Ownership & Insider Activity
Hedge funds and institutional managers reporting a position in ARGX · Health Care. Based on the most recent 13F filing from each holder, sourced from SEC EDGAR.
Reported Holders
24
13F filers
Aggregate Value
$1.4B
Across holders
Last Price
$1011.11
2026-08-24
Sector
Health Care
GICS
Quarterly fund activity14 increased10 reduced2 exited
Full exits: BALYASNY ASSET MANAGEMENT LLC, BAKER BROS. ADVISORS LP
| Manager⇅ | Type⇅ | Shares⇅ | Market Value▼ | % of Total⇅ | % of Portfolio⇅ | Action⇅ | QoQ Change⇅ | Quarter⇅ |
|---|---|---|---|---|---|---|---|---|
| SANDS CAPITAL MANAGEMENT, LLC CIK 0001020066 | Institutional Manager | 299K | $277.0M | 19.6% | 1.0% | Reduced | $-38.7M | Q2 2026 |
| Clearbridge Investments, LLC CIK 0001348883 | Hedge Fund | 254K | $235.4M | 16.7% | 0.2% | Added | +$20.8M | Q2 2026 |
| CITADEL ADVISORS LLC CIK 0001423053 | Hedge Fund | 212K | $197.1M | 14.0% | 0.0% | Reduced | +$170.7M | Q2 2026 |
| TWO SIGMA INVESTMENTS, LP CIK 0001179392 | Hedge Fund | 186K | $172.2M | 12.2% | 0.1% | Added | +$71.0M | Q2 2026 |
| MILLENNIUM MANAGEMENT LLC CIK 0001273087 | Hedge Fund | 94K | $87.6M | 6.2% | 0.0% | Added | +$20.4M | Q2 2026 |
| ORBIMED ADVISORS LLC CIK 0001055951 | Hedge Fund | 93K | $86.2M | 6.1% | 1.6% | Reduced | $-40.8M | Q2 2026 |
| PineBridge Investments, L.P. CIK 0001531721 | Hedge Fund | 96K | $70.6M | 5.0% | 0.5% | Added | +$14.0M | Q3 2025 |
| Squarepoint Ops LLC CIK 0001642575 | Hedge Fund | 58K | $54.2M | 3.8% | 0.1% | Added | +$53.3M | Q2 2026 |
| Woodline Partners LP CIK 0001784547 | Hedge Fund | 55K | $51.1M | 3.6% | 0.2% | Added | — | Q2 2026 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. CIK 0001165408 | Hedge Fund | 51K | $47.0M | 3.3% | 0.1% | Reduced | $-36.5M | Q2 2026 |
Reduced
Institutional Manager
$277.0M· 19.6% of total· 1.0% port· 299K sh· $-38.7M QoQ· Q2 2026
Added
Hedge Fund
$235.4M· 16.7% of total· 0.2% port· 254K sh· +$20.8M QoQ· Q2 2026
Reduced
Hedge Fund
$197.1M· 14.0% of total· 0.0% port· 212K sh· +$170.7M QoQ· Q2 2026
Added
Hedge Fund
$172.2M· 12.2% of total· 0.1% port· 186K sh· +$71.0M QoQ· Q2 2026
Added
Hedge Fund
$87.6M· 6.2% of total· 0.0% port· 94K sh· +$20.4M QoQ· Q2 2026
Reduced
Hedge Fund
$86.2M· 6.1% of total· 1.6% port· 93K sh· $-40.8M QoQ· Q2 2026
Added
Hedge Fund
$70.6M· 5.0% of total· 0.5% port· 96K sh· +$14.0M QoQ· Q3 2025
Added
Hedge Fund
$54.2M· 3.8% of total· 0.1% port· 58K sh· +$53.3M QoQ· Q2 2026
Added
Hedge Fund
$51.1M· 3.6% of total· 0.2% port· 55K sh· — QoQ· Q2 2026
Reduced
Hedge Fund
$47.0M· 3.3% of total· 0.1% port· 51K sh· $-36.5M QoQ· Q2 2026
Added
Hedge Fund
$37.2M· 2.6% of total· 0.0% port· 40K sh· — QoQ· Q2 2026
Added
Hedge Fund
$37.1M· 2.6% of total· 0.0% port· 40K sh· +$34.6M QoQ· Q2 2026
Reduced
Hedge Fund
$17.4M· 1.2% of total· 0.1% port· 19K sh· $-3.6M QoQ· Q2 2026
Reduced
Hedge Fund
$13.5M· 1.0% of total· 0.0% port· 15K sh· $-10.2M QoQ· Q2 2026
Added
Hedge Fund
$9.9M· 0.7% of total· 0.0% port· 11K sh· +$716K QoQ· Q2 2026
Reduced
Hedge Fund
$7.7M· 0.5% of total· 0.0% port· 8K sh· +$2.3M QoQ· Q2 2026
Reduced
Hedge Fund
$4.6M· 0.3% of total· 0.0% port· 5K sh· $-23.2M QoQ· Q2 2026
Added
Hedge Fund
$1.8M· 0.1% of total· 0.0% port· 2K sh· +$690K QoQ· Q2 2026
Added
Hedge Fund
$928K· 0.1% of total· 0.0% port· 1K sh· — QoQ· Q2 2026
Reduced
Hedge Fund
$768K· 0.1% of total· 0.0% port· 828 sh· +$318K QoQ· Q2 2026
Added
Institutional Manager
$296K· 0.0% of total· 0.0% port· 318 sh· — QoQ· Q2 2026
Added
Hedge Fund
$278K· 0.0% of total· 0.0% port· 335 sh· +$830 QoQ· Q2 2026
Added
Institutional Manager
$15K· 0.0% of total· 0.0% port· 16 sh· — QoQ· Q2 2026
Reduced
Hedge Fund
$14K· 0.0% of total· 0.0% port· 15 sh· $-636K QoQ· Q2 2026
1–10 of 24
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