NET INCOME PER COMMON SHARE (Tables)

9 Months Ended

Sep. 30, 2011

Basic and Diluted Net Income Per Share

The following table sets forth the computation of basic and diluted net income per share:

In thousands, except share and per share data
	Three Months Ended September 30,				Nine Months Ended September 30,
	2011		2010		2011		2010
Numerator:
Numerator for basic earnings per share
Net income attributable to Stericycle, Inc.	$	59,247	$	56,686	$	170,463	$	157,899
Denominator:
Denominator for basic earnings per share weighted average shares		85,564,682		85,295,740		85,654,097		84,986,187
Effect of diluted securities:
Employee stock options		1,820,439		1,883,317		1,966,770		1,844,574
Denominator for diluted earnings per share-adjusted weighted average shares and after assumed conversions		87,385,121		87,179,057		87,620,867		86,830,761
Earnings per share – Basic	$	0.69	$	0.66	$	1.99	$	1.86
Earnings per share – Diluted	$	0.68	$	0.65	$	1.95	$	1.82