Insider trading on May 18, 2026
95 insiders at 87 companies bought $38.6M of their own stock on the open market, across 123 transactions. The largest was Casdin Capital, LLC, Director, 10% Owner, buying $7.4M of GeneDx Holdings Corp. (WGS).
33 chief executives bought: Myers Franklin at DINO, Moulder Leon O Jr at ZBIO, Chan Hoi Lung at MIMI and 30 more.
Insiders sold $688.7M across 664 open-market sales. That is 17.8× the value bought. Selling routinely outweighs buying, because most executive pay is delivered in stock.
Open-market purchases
Code P only — insiders spending their own money, largest first.
Open-market sales
Pre-arranged 10b5-1 trades are marked.