Third Quarter Ended

Nine Months Ended

September 30

(millions, except per share amounts)

2012

2011

2012

2011

Net income attributable to Ecolab

$

238.0

$

154.3

$

472.2

$

373.8

Weighted-average common shares outstanding

Basic

292.7

231.9

292.0

231.8

Effect of dilutive stock options, units and awards

5.9

4.2

6.3

4.4

Diluted

298.6

236.1

298.3

236.2

Earnings attributable to Ecolab per common share

Basic

$

0.81

$

0.67

$

1.62

$

1.61

Diluted

$

0.80

$

0.65

$

1.58

$

1.58

Anti-dilutive securities excluded from computation of earnings per share

0.3

2.1

2.6

2.0