Earnings Per Share

6 Months Ended

Jun. 30, 2011

Earnings Per Share

Earnings Per Share

Note 2:           EARNINGS PER SHARE

The table below provides further share information used in computing our earnings per share for the periods presented herein. Basic earnings per share was computed by dividing net income attributable to AMCOL shareholders by the weighted average number of common shares outstanding during each period. Diluted earnings per share was computed by dividing net income attributable to AMCOL shareholders by the weighted average common shares outstanding after consideration of the dilutive effect of stock based compensation outstanding during each period.

	Six Months Ended June 30,				Three Months Ended June 30,
	2011		2010		2011		2010
Weighted average number of common shares outstanding		31,611,265		31,091,659		31,706,082		31,141,368
Dilutive impact of stock based compensation		487,247		375,680		499,683		373,522
Weighted average number of common and common equivalent shares outstanding for the period		32,098,512		31,467,339		32,205,765		31,514,890
Number of common shares outstanding at the end of the period		31,645,359		31,034,171		31,645,359		31,034,171
Weighted average number of anti-dilutive shares excluded from the computation of diluted earnings per share		175,614		554,056		230,665		610,295