Flammer Martina M.D. 4

What Happened Dr. Martina Flammer, Chief Medical Officer of INSMED Inc. (INSM), sold 869 shares on 2026-02-05 at $152.44 per share, for gross proceeds of $132,470. The filing reports this as an open-market/private sale (Form 4 code S). Sales are often routine and do not necessarily signal a change in outlook.

Key Details

• Transaction date and price: 2026-02-05 — 869 shares at $152.44 each.
• Total value: $132,470 (gross proceeds).
• Shares owned after transaction: not disclosed in the information provided in this summary.
• Footnote: Transaction was executed under a pre-established Rule 10b5-1 trading plan adopted by the reporting person on February 27, 2025.
• Filing timeliness: Report filed 2026-02-06 for a 2026-02-05 transaction — filed promptly (timely).

Context A 10b5-1 plan lets insiders sell shares on a preset schedule and is commonly used to avoid trading on inside information; trades under such plans are typically considered less informative about the insider’s current view. For retail investors, purchases tend to carry more direct informational weight than routine sales; this filing alone does not indicate a change in company fundamentals.