The following table presents details of stock-based compensation expense included in each functional line item in the consolidated statements of operations above:

	Three Months Ended January 31,								Twelve Months Ended January 31,
		2016				2015				2016				2015
	(unaudited, in thousands)
Stock-based compensation:
Cost of revenue	$	249			$	129			$	657			$	343
Research and development		7,116				3,072				19,082				8,654
Selling, general and administrative		4,181				2,384				11,355				6,695
Total stock-based compensation	$	11,546			$	5,585			$	31,094			$	15,692

AMBARELLA, INC.
RECONCILIATION OF GAAP TO NON-GAAP DILUTED EARNINGS PER SHARE
(in thousands, except share and per share data)
	Three Months Ended January 31,								Twelve Months Ended January 31,
		2016				2015				2016				2015
	(unaudited)
GAAP net income	$	5,096			$	17,674			$	76,508			$	50,571
Two-class method - allocation to participating securities	—					(1	)		—					(11	)
Treasury stock method - additional allocation to ordinary shares	—				—				—					1
GAAP net income - diluted	$	5,096			$	17,673			$	76,508			$	50,561
Non-GAAP adjustments:
Stock-based compensation expense, net of tax effect		10,414				4,919				27,766				13,866
Valuation allowance on deferred tax assets		6,090			—					6,090			—
Acquisition cost	—				—					1,229			—
Two-class method - additional allocation to participating securities	—				—				—					(3	)
Treasury stock method - additional allocation to ordinary shares	—				—				—				—
Non-GAAP net income - diluted	$	21,600			$	22,592			$	111,593			$	64,424
GAAP - diluted weighted average shares		33,747,273				33,074,033				33,755,709				32,278,127
Non-GAAP - diluted weighted average shares		33,747,273				33,074,033				33,755,709				32,278,127
GAAP - diluted net income per share	$	0.15			$	0.53			$	2.27			$	1.57
Non-GAAP adjustments:
Stock-based compensation expense, net of tax effect		0.31				0.15				0.82				0.43
Valuation allowance on deferred tax assets		0.18			—					0.18			—
Acquisition cost	—				—					0.04			—
Non-GAAP adjustment to two-class method diluted net income	—				—				—				—
Non-GAAP adjustment to treasury stock method diluted net income	—				—				—				—
Non-GAAP - diluted net income per share	$	0.64			$	0.68			$	3.31			$	2.00

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