Insmed CFO Sara Bonstein steps down; shares fall
INSM•Insmed shares fell 8.4% after CFO Sara Bonstein said she would step down effective Oct. 30; the company reaffirmed FY26 guidance and began searching for her successor.
1. CFO transition
Insmed said Sara Bonstein will step down as CFO effective Oct. 30 and that it has begun searching for her successor. RBC Capital Markets called the transition “largely benign” and said the timing should support a smooth handover after Insmed reports Q3 results on Oct. 29; the company reaffirmed FY26 guidance.
