ARGNF · Insider trading · 13F holders · Congress trades
Argenx SE (ARGNF)
Who is buying and selling ARGNF: company insiders on SEC Form 4, hedge funds and superinvestors on Form 13F, and members of Congress under the STOCK Act. Every figure links to the filing or page it comes from.
- 13F filers holding
- 45
- Insider buys, 90 days
- $0
- Insider sales, 90 days
- $0
- Congress trades, 12 months
- 0
ARGNF at a glance
- No open-market insider purchases or sales of ARGNF were filed in the last 90 days.
- 45 13F filers hold ARGNF among their 50 largest positions, worth $8.9B combined, including Behzad Aghazadeh. The biggest bets by portfolio weight are Eagle Health Investments LP (11.8%), Behzad Aghazadeh (8.3%) and Bellevue Group AG (5.9%). In their latest 13Fs, 4 managers opened a new position and 2 added to one.
- No member of Congress has disclosed a trade in ARGNF.
ARGNF insider trading
No open-market insider purchases or sales of ARGNF were filed in the last 90 days.
Who owns ARGNF? Hedge funds and superinvestors
45 13F filers hold ARGNF among their 50 largest positions, worth $8.9B combined, including Behzad Aghazadeh. The biggest bets by portfolio weight are Eagle Health Investments LP (11.8%), Behzad Aghazadeh (8.3%) and Bellevue Group AG (5.9%). In their latest 13Fs, 4 managers opened a new position and 2 added to one.
Superinvestors holding ARGNF: Behzad Aghazadeh 8.3%
| Manager | % of portfolio | Value | Shares | Last quarter | 13F |
|---|---|---|---|---|---|
| Jupiter Topco LLCInvestment manager | 0.9% | $2.3B | 2,474,015 | — | Q2 2026 |
| Janus Henderson Group PLCInvestment manager | 0.9% | $1.8B | 2,541,732 | +3.4% shares | Q1 2026 |
| Artisan Partners Limited PartnershipHedge fund | 2.3% | $1.4B | 1,508,778 | +2.8% shares | Q2 2026 |
| Behzad AghazadehHedge fund | 8.3% | $927.8M | 1,000,000 | +0.0% shares | Q2 2026 |
| Rtw Investments, LPHedge fund | 5.6% | $658.2M | 709,446 | +0.0% shares | Q2 2026 |
| Bellevue Group AGInvestment manager | 5.9% | $279.3M | 301,000 | -3.8% shares | Q2 2026 |
| Sands Capital Management, LLCHedge fund | 1.0% | $277.0M | 298,599 | -12.3% shares | Q2 2026 |
| William Blair Investment Management, LLCHedge fund | 0.7% | $245.5M | 264,617 | -0.5% shares | Q2 2026 |
| Checkpoint Capital L.P.Hedge fund | 31.3% | $121.8M | 131,283 | -14.2% shares | Q2 2026 |
| Eventide Asset Management, LLCMutual fund manager | 1.6% | $116.6M | 125,668 | +0.0% shares | Q2 2026 |
| PGGM InvestmentsAsset manager | 2.2% | $89.5M | 96,511 | +35.0% shares | Q2 2026 |
| Orbimed Advisors LLCHedge fund | 1.6% | $86.2M | 92,880 | -32.2% shares | Q2 2026 |
| Pinebridge Investments LLCInstitutional asset manager | 0.7% | $80.8M | 87,050 | -16.1% shares | Q2 2026 |
| TimesSquare Capital Management, LLCHedge fund | 1.1% | $77.1M | 83,114 | -0.0% shares | Q2 2026 |
| Eagle Health Investments LPHedge fund | 11.8% | $70.9M | 76,417 | +0.1% shares | Q2 2026 |
| Rock Springs Capital Management LPHedge fund | 2.4% | $48.9M | 52,750 | -46.4% shares | Q2 2026 |
| Tri Locum Partners LPHedge fund | 4.7% | $38.6M | 41,596 | +31.5% shares | Q2 2026 |
| Artia Global Partners LPHedge fund | 5.2% | $27.6M | 29,739 | +0.0% shares | Q2 2026 |
| Peregrine Capital Management LLCAsset manager | 0.9% | $27.6M | 29,732 | — | Q2 2026 |
| Oddo Bhf Asset Management SasAsset manager | 1.1% | $23.2M | 25,009 | +0.0% shares | Q2 2026 |
| Patient Square Capital LPHedge fund | 3.3% | $21.3M | 23,000 | -37.4% shares | Q2 2026 |
| Soleus Capital Management, L.P.Hedge fund | 0.6% | $18.5M | 19,955 | — | Q2 2026 |
| DCF Advisers, LLCAsset manager | 3.4% | $13.2M | 14,200 | -3.1% shares | Q2 2026 |
| Resolute Capital Asset Partners LLCHedge fund | 4.8% | $11.1M | 12,000 | New | Q2 2026 |
| Cvfg LLCWealth manager | 0.8% | $7.9M | 8,517 | +0.0% shares | Q2 2026 |
| Navellier & Associates IncWealth manager | 0.5% | $6.7M | 7,257 | +3.3% shares | Q2 2026 |
| Gunderson Capital Management LLCWealth manager | 1.6% | $5.8M | 6,078 | — | Q3 2026 |
| QVT Financial LPHedge fund | 0.3% | $4.8M | 5,218 | +0.0% shares | Q2 2026 |
| Acuta Capital Partners, LLCHedge fund | 3.0% | $4.4M | 4,705 | +0.3% shares | Q2 2026 |
| HighVista Strategies LLCHedge fund | 1.0% | $4.2M | 4,561 | -7.3% shares | Q2 2026 |
The 30 largest of 45 positions, by value. Each manager counts with its latest 13F (Q3 2026: 6, Q2 2026: 38, Q1 2026: 1). Screen ARGNF in the grand portfolio →
ARGNF stock trades by members of Congress
No member of Congress has disclosed a trade in ARGNF.
ARGNF questions and answers
Are insiders buying ARGNF stock?
No open-market insider purchases or sales of ARGNF were filed in the last 90 days.
Which hedge funds own ARGNF?
45 13F filers hold ARGNF among their 50 largest positions, worth $8.9B combined, including Behzad Aghazadeh. The biggest bets by portfolio weight are Eagle Health Investments LP (11.8%), Behzad Aghazadeh (8.3%) and Bellevue Group AG (5.9%). In their latest 13Fs, 4 managers opened a new position and 2 added to one.
Has Congress traded ARGNF?
No member of Congress has disclosed a trade in ARGNF.
Who is the largest holder of ARGNF?
Among 13F filers, Jupiter Topco LLC reports the largest ARGNF position, $2.3B (2,474,015 shares) in its Q2 2026 13F. The biggest bet by portfolio weight is Eagle Health Investments LP's: 11.8% of its portfolio.
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