Earnings Per Share

The Company computes earnings per share using the two-class method, which is an earnings allocation formula that determines earnings per share for common stock and participating securities. Service-based and performance-based restricted stock awards granted by the Company are considered participating securities as these awards contain a non-forfeitable right to dividends.

The following table sets forth the computation of earnings per share for the three and nine months ended September 30, 2017 and 2016 (in millions, except per share amounts):



	Three Months Ended September 30,						Nine Months Ended September 30,
	2017			2016			2017			2016
Numerator:
Net income attributable to Hubbell	$	80.8		$	86.7		$	222.7		$	228.6
Less: Earnings allocated to participating securities	(0.3		)	(0.3		)	(0.7		)	(0.7		)
Net income available to common shareholders	$	80.5		$	86.4		$	222.0		$	227.9
Denominator:
Average number of common shares outstanding	54.6			55.3			54.9			55.6
Potential dilutive common shares	0.3			0.2			0.3			0.2
Average number of diluted shares outstanding	54.9			55.5			55.2			55.8
Earnings per share:
Basic	$	1.47		$	1.56		$	4.05		$	4.10
Diluted	$	1.47		$	1.56		$	4.02		$	4.08

The Company did not have outstanding any significant anti-dilutive securities during the three and nine months ended September 30, 2017 and 2016.