Biotech Stocks Surge in After-Hours Trading: Butterfly Network, Citius Pharma Lead the Way

Biotech and healthcare stocks saw notable activity in after-hours trading on November 21, 2025. Butterfly Network shares rose 6.04% to $2.81, while Citius Pharmaceuticals gained 7.90% to $1.23. ProQR Therapeutics rose 6.80% to $2.20, and Perrigo Company advanced 3.97% to $13.14. Tempest Therapeutics added 4.86% to $3.67, while Iterum Therapeutics rose 2.77% to $0.3969. Processa Pharmaceuticals edged up 1.86% to $0.26.