X0306 4 2020-10-14 0 0001741830 Kronos Bio, Inc. KRON 0001221355 Kazam Joshua A C/O KRONOS BIO, INC. 1300 SO. EL CAMINO REAL, SUITE 300 SAN MATEO CA 94402 1 0 0 0 Common Stock 2020-10-14 4 C 0 23556 A 25666 D Common Stock 2020-10-14 4 C 0 68815 A 94481 D Series Seed Preferred Stock 2020-10-14 4 C 0 22328 D Common Stock 23556 0 D Series A Preferred Stock 2020-10-14 4 C 0 65228 D Common Stock 68815 0 D Each share of Series Seed Preferred Stock and Series A Preferred Stock (the "Preferred Stock") automatically converted into 1.055 shares of Common Stock upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date. 68,815 of the shares are held jointly with spouse. /s/ David Tanen, Attorney-in-Fact 2020-10-16