X0306 4 2023-03-15 0 0000861878 STERICYCLE INC SRCL 0001754743 Miller Cindy J 2355 WAUKEGAN ROAD BANNOCKBURN IL 60015 1 1 0 0 Chief Executive Officer Common Stock 2023-03-15 4 M 0 11331 A 83829 D Common Stock 2023-03-15 4 F 0 5020 42.82 D 78809 D Performance-Based Stock Units 0.0 2023-03-15 4 A 0 57800 0.0 A Common Stock 57800 99349 D Restricted Stock Units 0.0 2023-03-15 4 M 0 11331 D Common Stock 11331 36816 D Restricted Stock Units 0.0 2023-03-15 4 A 0 47290 0.0 A Common Stock 47290 84106 D Each restricted stock unit (RSU) represents the right to receive, at settlement, one share of common stock. This transaction represents the settlement of RSUs in shares of common stock on their scheduled vesting date. No shares were sold. 5,020 shares were withheld by the Issuer to satisfy the minimum statutory tax withholding requirements on vesting of RSUs. The vesting of these performance-based stock units ("PSU") is dependent upon the achievement by Stericycle, Inc. of certain financial performance criteria. Subject to accelerated vesting in certain circumstances, the number of PSUs scheduled to vest on the third anniversary of the grant date following the 2025 annual performance period will vary between 0% and 200% of the number reported, depending on the extent to which Stericycle, Inc. meets certain financial performance goals. This award was granted on March 15, 2022 for 33,995 shares. 11,331 shares vested on March 15, 2023 and the remaining unvested RSUs are scheduled to vest on the next 2 anniversaries of the grant date. Each restricted stock unit (RSU) represents the right to receive, at settlement, one share of common stock. The RSUs vest in 3 annual installments on each of the first three anniversaries of the grant date. /s/ Cindy J. Miller 2023-03-17