3. NET INCOME PER SHARE

The calculation of net income per share attributable to Neogen Corporation follows:


	Three Months Ended February 28,				Nine Months Ended February 28,
	2018		2017		2018		2017
	(in thousands, except per share amounts)
Numerator for basic and diluted net income per share:
Net income attributable to Neogen	$	16,586	$	10,287	$	45,600	$	31,320
Denominator for basic net income per share:
Weighted average shares		51,537		50,746		51,253		50,438
Effect of dilutive stock options		700		633		761		723

Denominator for diluted net income per share		52,237		51,379		52,014		51,161

Net income attributable to Neogen per share:
Basic	$	0.32	$	0.20	$	0.89	$	0.62

Diluted	$	0.32	$	0.20	$	0.88	$	0.61

The Board of Directors declared a 4 for 3 stock split effective December 29, 2017. All share and per share amounts in this Form 10-Q reflect amounts as if the split took place at the beginning of the periods presented.