Note 7—Earnings Per Share

Basic earnings per share (“EPS”) is computed by dividing net income attributable to Amphenol Corporation by the weighted average number of common shares outstanding. Diluted EPS is computed by dividing net income attributable to Amphenol Corporation by the weighted average number of common shares and dilutive common shares outstanding, which relates to stock options. A reconciliation of the basic weighted average common shares outstanding to diluted weighted average common shares outstanding for the three and nine months ended September 30, 2018 and 2017 is as follows:


	Three Months Ended September 30,				Nine Months Ended September 30,
(dollars and shares in millions, except per share data)	2018		2017		2018		2017
Net income attributable to Amphenol Corporation shareholders	$	316.6	$	277.5	$	866.9	$	753.9
Basic weighted average common shares outstanding		300.5		305.0		301.7		305.8
Effect of dilutive stock options		11.9		10.7		11.9		10.3
Diluted weighted average common shares outstanding		312.4		315.7		313.6		316.1
Earnings per share attributable to Amphenol Corporation shareholders:
Basic	$	1.05	$	0.91	$	2.87	$	2.47
Diluted	$	1.01	$	0.88	$	2.76	$	2.39

Excluded from the computations above were anti-dilutive common shares of 6.1 million and 5.3 million for the three months ended September 30, 2018 and 2017, respectively, and 2.5 million and 2.1 million for the nine months ended September 30, 2018 and 2017, respectively.