Why Is Insmed $INSM Stock Down -8.43% Today? (Find out why any stock moved today on Tickeron.) • $INSM shares fell 8.43% to $101.75, down $9.37 from the prior session's close of $111.12. • The primary catalyst was the surprise announcement that Chief Financial Officer Sara Bonstein will step down effective October 30, 2026. • The company reaffirmed its full-year 2026 revenue guidance and said it expects to reach cash-flow positivity next year. • The move extends a steep downtrend, with the stock down roughly 36% year-to-date. • Analysts remain broadly bullish, but the leadership transition has added near-term uncertainty ahead of third-quarter results on October 29. $RVMD $GPCR $ALNY $CYTK $ARGX $MDGL $ABVX