X0306 4 2021-11-01 0 0000861878 STERICYCLE INC SRCL 0001754743 Miller Cindy J 2355 WAUKEGAN ROAD BANNOCKBURN IL 60015 1 1 0 0 Chief Executive Officer Common Stock 2021-11-01 4 M 0 2232 A 23116 D Common Stock 2021-11-01 4 F 0 1035 67.85 D 22081 D Restricted Stock Units 0.0 2021-11-01 4 M 0 2232 D Common Stock 2232 61946 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. 1,035 shares were withheld by the Issuer to satisfy the minimum statutory tax withholding requirements on vesting of RSUs. This award was granted on November 1, 2018 for 11,159 shares. 2,232 shares vested on November 1, 2021 and the remaining unvested RSUs will continue to vest in equal annual installments on the next 2 anniversaries of the grant date. All unvested RSUs are subject to continued employment through the applicable vesting date. /s/ Cindy J. Miller 2021-11-03