Stocks › ARGX
ARGENX SE
ARGX·Nasdaq·USD
$930.52
+17.65 (+1.93%)
Close · Oct 6, 2026 · Close Prices from Tiingo.com
ARGX
ARGENX SE · Nasdaq
Nasdaq 100S&P 500
Filings
Default90D1Y5YALL
ARGXS&P 500 (rebased)
Congress BuyCongress SellInsider BuyInsider SellForm 1448-K ResultsLobbying
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Daily closes, adjusted for splits and dividends · Close Prices from Tiingo.comHover a marker, every one is a filing · move across the line for the crosshair
Congressional Trades
Recent trades of ARGX by members of U.S. Congress · 2 on record · 1 in the last 12 months
| Politician | Stock | Type | Filed | Traded | |
|---|---|---|---|---|---|
 Alan ArmstrongSenate · R · OK |
ARGXARGENX SE · Stock |
Purchase $1,001 - $15,000 |
Jul 21, 2026 | Mar 30, 2026 | Filing ↗ |
 Daniel S. GoldmanHouse · D · NY |
ARGXARGENX SE · Stock |
Sale $1,001 - $15,000 |
Aug 13, 2023 | Jul 10, 2023 | Filing ↗ |
Whale Activity
Position changes in ARGX reported for 2026-06-30 by 14 tracked institutional filers
- Increased3
- New1
- Held0
- Decreased3
- Closed0
- No prior filing7
| Filer | Shares | Value | Change |
|---|---|---|---|
| Artisan Partners Limited Partnership | 1.5M | $1.40B | — |
| BlackRock, Inc. | 777.2K | $721.1M | decreased |
| SANDS CAPITAL MANAGEMENT, LLC | 298.6K | $277.0M | — |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC | 264.6K | $245.5M | — |
| CITADEL ADVISORS LLC | 212.4K | $197.1M | decreased |
| TWO SIGMA INVESTMENTS, LP | 185.6K | $172.2M | increased |
| MILLENNIUM MANAGEMENT LLC | 94.4K | $87.6M | increased |
| Point72 Asset Management, L.P. | 40.0K | $37.1M | new |
| D. E. Shaw & Co., Inc. | 8,263 | $7.7M | decreased |
| HARVEY CAPITAL MANAGEMENT INC | 4,346 | $4.0M | — |
| Bridgewater Associates, LP | 1,958 | $1.8M | increased |
| BAROMETER CAPITAL MANAGEMENT INC. | 1,950 | $1.8M | — |
KeyVex tracks a curated set of large 13F filers plus the largest positions in recent filings, so this is a sample of institutional activity, not the whole market.
Insider Trading
Net shares bought (+) or sold (−) on the open market by ARGX insiders, by quarter · Form 4
No open-market insider buys or sells in the last two years.
Recent Insider Transactions
0 transactions on record · newest first
No insider transactions on record.
Fund Holders
Mutual funds and ETFs holding ARGX · SEC Form N-PORT
| Fund | Shares | Value | % of fund | As of |
|---|---|---|---|---|
| EUPAC Fund | 1.0M | $950.3M | 0.67% | Jun 30, 2026 |
| New Economy Fund | 713.7K | $596.6M | 1.16% | May 31, 2026 |
| Fidelity Growth Company Fund Fidelity Mt. Vernon Street Trust | 609.1K | $509.2M | 0.52% | May 31, 2026 |
| Janus Henderson Forty Fund Janus Investment Fund | 519.0K | $481.5M | 2.02% | Jun 30, 2026 |
| Fidelity OTC Portfolio Fidelity Securities Fund | 481.9K | $411.5M | 0.95% | Jul 31, 2026 |
| iShares Biotechnology ETF iShares Trust | 368.2K | $341.6M | 3.76% | Jun 30, 2026 |
| Janus Henderson Enterprise Fund Janus Investment Fund | 309.1K | $286.7M | 1.28% | Jun 30, 2026 |
| T. Rowe Price Growth Stock Fund, Inc. | 225.0K | $208.8M | 0.42% | Jun 30, 2026 |
| Invesco American Franchise Fund AIM Counselor Series Trust (Invesco Counselor Series Trust) | 245.6K | $205.3M | 1.12% | May 31, 2026 |
| T. Rowe Price Large-Cap Growth Fund T. Rowe Price Equity Funds, Inc. | 211.4K | $196.1M | 0.95% | Jun 30, 2026 |
Mutual funds and ETFs whose N-PORT filings list ARGX's shares (CUSIP 04016X101), each fund at its latest report since Mar 7, 2026, largest positions first. Bonds, options and short positions are left out.
Activist & Passive Stakes
Schedule 13D / 13G beneficial-ownership filings
Corporate Lobbying
Estimated quarterly lobbying spending reported under the LDA, filings naming ARGENX SE as client
No lobbying filings found naming ARGENX SE as the client.
Government Contracts
Federal awards to ARGENX SE · USAspending
No federal contract awards found for ARGENX SE.
U.S. Patents
Recent USPTO applications naming ARGENX SE
No USPTO patent applications found for ARGENX SE.
Annual Financials
From ARGX's 10-K filings · XBRL
No annual XBRL figures on record for ARGX. KeyVex's fundamentals cover about 130 large companies so far.
Stock Splits
Every split and reverse split in the price history
No stock splits in ARGX's price history.
Material Events (8-K)
Corporate events filed with the SEC
No 8-K filings on record.
About ARGENX SE
From SEC EDGAR company records
Industry (SIC 2836)Biological Products, (No Diagnostic Substances)
SectorHealthcare
HeadquartersZWIJNAARDE
IncorporatedP7
SEC CIK0001697862 ↗
Former namesargenx N.V