X0306 4 2023-03-10 0 0000861878 STERICYCLE INC SRCL 0001754743 Miller Cindy J 2355 WAUKEGAN ROAD BANNOCKBURN IL 60015 1 1 0 0 Chief Executive Officer Common Stock 2023-03-10 4 M 0 10182 A 59193 D Common Stock 2023-03-10 4 F 0 4511 43.5 D 54682 D Common Stock 2023-03-10 4 M 0 2401 A 57083 D Common Stock 2023-03-10 4 F 0 1064 43.5 D 56019 D Common Stock 2023-03-10 4 M 0 29589 A 85608 D Common Stock 2023-03-10 4 F 0 13110 43.5 D 72498 D Performance-based Restricted Stock Units 0.0 2023-03-10 4 M 0 29589 D Common Stock 29589 53268 D Restricted Stock Units 0.0 2023-03-10 4 M 0 10182 D Common Stock 10182 50548 D Restricted Stock Units 0.0 2023-03-10 4 M 0 2401 D Common Stock 2401 48147 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. 4,511 shares were withheld by the Issuer to satisfy the minimum statutory tax withholding requirements on vesting of RSUs. No shares were sold. 1,064 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 continued employment through the applicable vesting date and to accelerated vesting in certain circumstances, the number of PSUs scheduled to vest on the third anniversary of the grant date following the 2022 annual performance period will vary between 0% and 187.5% of the number reported, depending on the extent to which Stericycle, Inc. meets certain financial performance goals. No shares were sold. 13,110 shares were withheld by the Issuer to satisfy the minimum statutory tax withholding requirements on vesting of PSUs. This award was granted on March 11, 2020 for 37,335 shares. 29,589 shares vested on March 11, 2023. This award was granted on March 11, 2020 for 30,546 shares. The final 10,182 shares vested on March 11, 2023. This award was granted on March 12, 2019 for 12,005 shares. 2,401 shares vested on March 12, 2023 and the remaining unvested RSUs are scheduled to vest on the next anniversary of the grant date. /s/ Cindy J. Miller 2023-03-13