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argenx SE Investor Day Presentation Deck

Model Predicts Potential for Infrequent Dosing argenx Free C2, mg/L 20.00 1.00 0.10 0.01 0 Free C2 levels Free C2 concentration-time plot 60 mg/kg LD + 10 mg/kg Q2W from Week 1 onwards 40 mg/kg Q4W 60 mg/kg Q8W 4 Time, weeks 10 99% reduction 12 14 1 16 Model assumes full complement blockage as of free C2 levels < 0.2 µg/mL or >99% reduction of free C2 levels 60

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