X0306 4/A 2020-08-10 2020-08-12 0 0001564406 Oak Street Health, Inc. ?OSH? 0001818825 JURGENSON TAMARA C/O OAK STREET HEALTH, INC. 30 W. MONROE STREET, SUITE 1200 CHICAGO IL 60603 0 1 0 0 Chief Growth Officer Common stock, $0.001 par value 2020-08-10 4 P 0 7500 21.00 A 360109 D Represents shares purchased in the Issuer's directed share program upon the closing of the Issuer's initial public offering, which closed on August 10, 2020. These shares were omitted from the Reporting Person's previous form 4. /s/ Robert Guenthner, as attorney-in-fact for Tamara Jurgenson 2020-08-28