Insider buying on Oct 31, 2025

On Oct 31, 2025, 27 insiders at 26 companies filed 41 purchases reported on Form 4, worth $13.1M in all, with a median purchase of $37.5K. The largest was Jenisch Jan Philipp, Chairman & CEO, Director of Amrize Ltd (AMRZ), who reported buying 55,000 shares worth $2.9M. Officers accounted for 23 purchases, directors who are not officers for 11, and 10% owners with no board or officer role for 4. Chief executives and chief financial officers filed 14 purchases: Jenisch Jan Philipp, Chairman & CEO, Director of Amrize Ltd (AMRZ); Frost Phillip Md Et Al, CEO & Chairman, Director, 10% owner of Opko Health, Inc. (OPK); Caldwell Christopher A, President and CEO, Director of Concentrix Corp (CNXC) among others. 7 companies showed cluster buying, two or more insiders buying within 7 days, among them MRP (3 insiders), AMRZ (2 insiders), AVBC (2 insiders), FMAO (2 insiders). For 3 insiders of 27, this was the first purchase of that company's stock on our record. That is fewer than the 51 purchases filed on Oct 30, 2025. 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.