KRON - Kronos Bio rises 13% as CEO buys shares worth $2.3M May, 20 2022 01:15 PM Kronos Bio Inc. Kronos Bio (KRON +12.7%) CEO, Norbert Bischofberger bought 597,129 shares at $3.54 - $4.00 worth ~ $2.3M. CEO now owns 809,609 shares. For further details see: Kronos Bio rises 13% as CEO buys shares worth $2.3M