Insmed Incorporated (NASDAQ: INSM) Stock Week Ahead: Nasdaq-100 Addition Meets Brensocatib Setback—News, Forecasts, and What to Watch (Dec. 22–26, 2025)
Insmed will join the Nasdaq-100 before markets open Monday, December 22, 2025. Shares fell 11% last week after the company halted development of brensocatib in chronic rhinosinusitis without nasal polyps following a failed Phase 2b trial. The stock last traded near $174.84. Holiday trading may affect liquidity and volatility.