Net income (loss) per share attributable to common stockholders

Basic and diluted net income (loss) per share attributable to common stockholders is presented in conformity with the two-class method required for participating securities. The Company considers its redeemable convertible preferred stock to be participating securities as the holders of redeemable convertible preferred stock were entitled to receive noncumulative dividends in the event that a dividend was paid on common stock. Upon the closing of the IPO, all outstanding shares of the Company’s redeemable convertible preferred stock automatically converted into 32,482,590 shares of common stock on a one-for-one basis.

Basic net income (loss) attributable to common stockholders per share is calculated by dividing net income (loss) attributable to common stockholders by the weighted-average number of shares of common stock outstanding less shares subject to repurchase. Diluted net income (loss) per share attributable to common stockholders adjusts the basic net income (loss) per share attributable to common stockholders and the weighted-average number of shares of common stock outstanding for the potentially dilutive impact of stock options and RSUs, using the treasury stock method, and convertible preferred stock using the as-if-converted method.

The following table sets forth the computation of the Company’s basic and diluted net income (loss) per share attributable to common stockholders:



	Three Months Ended						Six Months Ended
	March 30, 2019			March 31, 2018			March 30, 2019		March 31, 2018
(In thousands, except share and per share data)
Numerator:
Net income (loss)	$	(22,824	)	$	(32,592	)	$	38,843	$	13,105
Less: noncumulative dividend to preferred stockholders	—			—			—		(7,293		)
Less: undistributed earnings to participating securities	—			—			—		(2,059		)
Net income (loss) attributable to common stockholders—basic	$	(22,824	)	$	(32,592	)	$	38,843	$	3,753
Add: undistributed earnings reallocated to holders of common stock	—			—			—		275
Net income (loss) attributable to common stockholders—diluted	$	(22,824	)	$	(32,592	)	$	38,843	$	4,028
Denominator:
Weighted-average shares of common stock—basic	102,331,529			59,606,879			101,239,817		59,189,760
Effect of potentially dilutive stock options	—			—			9,901,628		14,175,913
Effect of RSUs	—			—			332,612		—
Weighted-average shares of common stock—diluted	102,331,529			59,606,879			111,474,057		73,365,673
Net income (loss) per share attributable to common stockholders:
Net income (loss) per share attributable to common stockholders—basic	$	(0.22	)	$	(0.55	)	$	0.38	$	0.06
Net income (loss) per share attributable to common stockholders—diluted	$	(0.22	)	$	(0.55	)	$	0.35	$	0.05

The following potentially dilutive shares were excluded from the computation of diluted net income (loss) per share attributable to common stockholders because including them would have been antidilutive:



	Three Months Ended		Six Months Ended
	March 30, 2019	March 31, 2018	March 30, 2019	March 31, 2018
Convertible preferred stock	—	32,482,590	—	32,482,590
Stock options to purchase common stock	41,602,128	45,171,937	34,926,238	30,546,921
Restricted stock units	3,215,651	—	1,410,272	—
Shares subject to repurchase	—	53,892	—	—
Total	44,817,779	77,708,419	36,336,510	63,029,511