Insider buying on May 13, 2026

On May 13, 2026, 80 insiders at 68 companies filed 125 purchases reported on Form 4, worth $303.9M in all, with a median purchase of $99.2K. The largest was RA Capital Nexus Fund III, L.P., Director, 10% owner of Artiva Biotherapeutics, Inc. (ARTV), who reported buying 6,510,416 shares worth $75.0M. Officers accounted for 41 purchases, directors who are not officers for 51, and 10% owners with no board or officer role for 29. Chief executives and chief financial officers filed 25 purchases: Mittelstaedt Ronald J, President & CEO, Director of Waste Connections, Inc. (WCN); Cahillane Steven A, Chief Executive Officer, Director of Kraft Heinz Co (KHC); Huang Jack Jiajia, Chief Executive Officer, Director, 10% owner of 51Talk Online Education Group (COE) among others. 24 companies showed cluster buying, two or more insiders buying within 7 days, among them XRN (8 insiders), ODTX (7 insiders), FLUT (7 insiders), PSN (4 insiders). For 26 insiders of 80, this was the first purchase of that company's stock on our record. That is fewer than the 127 purchases filed on May 12, 2026. A Form 4 is due within two business days of the trade, so most of these purchases were made earlier in the week. Code P also covers shares bought privately from the company, so one large figure can be a negotiated placement rather than buying on the exchange.