Flammer Martina M.D., Chief Medical Officer at Insmed Incorporated (INSM), has filed 70 Form 4 transactions, all in that single company. The pattern is one-sided: 51 open-market sales totaling $51,218,744.39, with zero open-market purchases and no acquisitions of shares. The recent activity, covering 19 trades from January through August 2026, is entirely sales and option exercises.
The August 6, 2026 filing shows the largest recent activity. Flammer sold shares worth $2,365,173.20 and $1,129,665, while exercising options valued at $229,757.85 and $346,368.10. The July 6 filing followed a similar structure: sales of $823,748.80 and $529,183.08, paired with option exercises of $86,007.18 and $231,437.85. The option exercises, coded M, are mechanical transactions that convert derivatives into shares, often to facilitate the accompanying sales.
The selling has been consistent across the period. Sales occurred on February 2, February 3, February 5, May 11, May 13, May 14, June 3, June 5, July 6, and August 6. Individual sale values ranged from $15,686 to $2.36 million. The May 11 filing included three separate sales totaling roughly $1.53 million, plus an option exercise of $221,039.43. The February 2 filing contained five sales ranging from $85,609.78 to $517,621.44, alongside an option exercise of $524,577.04. The most recent sale, on August 6, was the single largest transaction in the group.
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