X0306 4 2015-09-10 0 0000861878 STERICYCLE INC SRCL 0001298084 Brown Thomas D 28161 N. KEITH DRIVE LAKE FOREST IL 60045 1 0 0 0 Depositary Shares 2015-09-10 4 P 0 2200 100.00 A 2015-09-10 2018-09-15 Common Stock 1292 2200 D This form reports the purchase by the undersigned of 2,200 depositary shares, each representing a 1/10th interest in a share of the issuer's 5.25% Series A Mandatory Convertible Preferred Stock. The conversion rate for each depositary share will be not more than 0.73394 shares of common stock and not less than 0.58716 shares of common stock depending on the applicable market value of the common stock. Represents the minimum number of shares of common stock into which the 2,200 depositary shares are convertible. Represents the purchase price for each depositary share. /s/ Thomas D. Brown 2015-12-29