Net Income Per Share

6 Months Ended

Jun. 28, 2019

10. Net Income Per Share

Basic net income per share excludes dilution and is computed by dividing net income by the weighted average number of common shares outstanding for the period. Diluted net income per share reflects the potential dilution that would occur if outstanding securities or other contracts to issue common stock were exercised or converted into common stock.

The following is a reconciliation of the numerators and denominators used in computing basic and diluted net income (loss) per share (in thousands, except per share data):

	Three Months Ended					Six Months Ended
	June 28,			June 29,		June 28,		June 29,
	2019			2018		2019		2018
Numerator:
Net income (loss) attributable to Ultra Clean Holdings, Inc.	$	(202	)	$	18,960	$	403	$	43,701
Denominator:
Shares used in computation — basic:
Weighted average common shares outstanding		39,399			38,802		39,261		37,763
Shares used in computation — diluted:
Shares used in computing basic net income per share		39,399			38,802		39,261		37,763
Dilutive effect of common shares outstanding subject to repurchase		—			489		294		649
Dilutive effect of options outstanding		—			6		1		6
Weighted average shares used in computing diluted net income (loss) per share		39,399			39,297		39,556		38,418
Net income (loss) per share attributable to Ultra Clean Holdings, Inc. — basic	$	(0.01	)	$	0.49	$	0.01	$	1.16
Net income (loss) per share attributable to Ultra Clean Holdings, Inc. — diluted	$	(0.01	)	$	0.48	$	0.01	$	1.14