Flammer Martina M.D., Chief Medical Officer of INSM (Insmed Incorporated), has demonstrated a clear selling bias in recent transactions, with no recorded purchases in the latest filings. Over 55 reported trades, she has sold $42.49 million worth of shares compared to $6.40 million in buys, a ratio of nearly 6.6-to-1 in favor of disposals. The recent activity reinforces this trend, with 22 sales and no buys since early January 2026. Notably, her transactions in February 2026 included multiple sales on February 2, totaling over $1.3 million, followed by additional disposals of $123,837 and $132,470 on February 3 and 5, respectively.
The bulk of Flammer’s selling occurred in early January 2026, with particularly heavy activity on January 5 and 6. On January 5 alone, she executed seven sales, including transactions valued at $546,805, $485,495, and $315,679. The following day saw another wave of disposals, including a single-day high of $829,707. While some transactions were marked as market sales ("S"), others were coded as "M" (merger or acquisition-related), such as a $524,577 sale on February 2. The consistency and scale of these disposals suggest a deliberate reduction in her INSM holdings, though the filings do not indicate whether the sales were part of a prearranged trading plan.
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