X0306 4 2022-02-04 0 0001564406 Oak Street Health, Inc. OSH 0001819292 CLEM BRIAN C/O OAK STREET HEALTH, INC. 30 W. MONROE STREET, SUITE 1200 CHICAGO IL 60603 0 1 0 0 Chief Operating Officer Common Stock, $0.001 par value 2022-02-04 4 S 0 1151 16.655 D 596627 D Common Stock, $0.001 par value 48 D Represents shares sold pursuant to standing order to satisfy income tax withholding and remittance obligations in connection with the vesting of of restricted stock units previously reported. /s/ Robert Guenthner, attorney-in-fact for Brian Clem 2022-02-07