(9) Earnings per share

Basic earnings per share of Class A common stock is computed by dividing net income attributable to Planet Fitness, Inc. by the weighted-average number of shares of Class A common stock outstanding during the same period. Diluted earnings per share of Class A common stock is computed by dividing net income attributable to Planet Fitness, Inc. by the weighted-average number of shares of Class A common stock outstanding adjusted to give effect to potentially dilutive securities. There were no shares of Class A or Class B common stock outstanding prior to August 6, 2015, therefore no earnings per share information has been presented for any period prior to that date.

Shares of the Company’s Class B common stock do not share in the earnings or losses attributable to Planet Fitness, Inc. and are therefore not participating securities. As such, separate presentation of basic and diluted earnings per share of Class B common stock under the two-class method has not been presented. Shares of the Company’s Class B common stock are, however, considered potentially dilutive shares of Class A common stock because shares of Class B common stock, together with the related Holdings Units, are exchangeable into shares of Class A common stock on a one-for-one basis.

The following table sets forth reconciliations used to compute basic and diluted earnings per share of Class A common stock:

Net income per share:	For the three months ended September 30, 2016		For the nine months ended September 30, 2016		August 6, 2015 through September 30, 2015
Numerator
Net income	$	14,863	$	49,300	$	6,214
Less: net income attributable to non-controlling interests		11,438		38,374		4,593
Net income attributable to Planet Fitness, Inc. - basic	$	3,425	$	10,926	$	1,621
Reallocation of net income assuming conversion of Holdings Units		-		-		4,518
Incremental tax effect of reallocation of net income assuming conversion of Holdings Units		-		-		(1,740	)
Net income attributable to Planet Fitness, Inc. - diluted	$	3,425	$	10,926	$	4,399


Denominator
Weighted-average shares of Class A common stock outstanding - basic		44,668,875		39,394,318		35,661,284
Effect of dilutive securities:
Class B common stock		-		-		63,048,456
Stock options		12,539		138		-
Restricted stock units		4,282		3,030		-
Weighted-average shares of Class A common stock outstanding - diluted		44,685,696		39,397,486		98,709,740

Earnings per share of Class A common stock - basic	$	0.08	$	0.28	$	0.05
Earnings per share of Class A common stock - diluted	$	0.08	$	0.28	$	0.04

Weighted average shares of Class B common stock of 53,898,536 and 59,218,127 for the three and nine months ended September 30, 2016, respectively, were evaluated under the if-converted method for potential dilutive effects and determined to be anti-dilutive. Weighted average stock options outstanding of 250,141 and 230,633 for the three and nine months ending September 30, 2016, respectively, were evaluated under the treasury stock method for potential dilutive effects and were determined to be anti-dilutive. Weighted average stock options outstanding of 116,690 and restricted stock units of 8,160 for the period from August 6, 2015 through September 30, 2015 were evaluated under the treasury stock method for potential dilutive effects and were determined to be anti-dilutive.