Years Ended December 31,

2017

2018

2019

(In Thousands of U.S. Dollars, except share and

per share data)

Numerator:

Net income attributable to Canadian Solar Inc. — basic

$

99,572

$

237,070

$

171,585

Dilutive effect of interest expense of convertible notes

4,649

4,683

975

Net income attributable to Canadian Solar Inc. — diluted

$

104,221

$

241,753

$

172,560

Denominator:

Denominator for basic calculation — weighted average number of common shares — basic

58,167,004

58,914,540

59,633,855

Diluted effects of share number from share options and RSUs

547,821

543,797

794,526

Dilutive effects of share number from convertible notes

2,833,333

349,315

Denominator for diluted calculation — weighted average number of common shares — diluted

61,548,158

62,291,670

60,777,696

Basic earnings per share

$

1.71

$

4.02

$

2.88

Diluted earnings per share

$

1.69

$

3.88

$

2.83