Net Income (Loss) Per Share

6 Months Ended

Jul. 31, 2016

We compute basic net income (loss) per share using the weighted average number of common shares outstanding during the period. We compute diluted net income per share using the weighted average number of common shares and potentially dilutive common shares outstanding during the period. Potentially dilutive common shares consist of common shares issuable upon vesting of restricted stock units, exercise of stock options and ESPP purchase rights, and conversion of the 4.00% Debentures using the treasury stock method.

The following provides the computation of basic and diluted net income (loss) per share:



	Three months ended July 31,					Six months ended July 31,
	2016		2015			2016			2015
Net income (loss) attributable to Mentor Graphics shareholders	$	3,437	$	31,212		$	(9,999	)	$	21,327
Adjustment to redemption value of noncontrolling interest with redemption feature	—		(144		)	—			125
Adjusted net income (loss) attributable to Mentor Graphics shareholders	$	3,437	$	31,068		$	(9,999	)	$	21,452

Weighted average common shares used to calculate basic net income (loss) per share	107,374		116,584			108,215			116,296
Potentially dilutive common shares	2,500		2,784			—			2,690
Weighted average common and potentially dilutive common shares used to calculate diluted net income (loss) per share	109,874		119,368			108,215			118,986

Net income (loss) per share attributable to Mentor Graphics shareholders:
Basic net income (loss) per share	$	0.03	$	0.27		$	(0.09	)	$	0.18
Diluted net income (loss) per share	$	0.03	$	0.26		$	(0.09	)	$	0.18

We have adjusted the numerator of our basic and diluted net income per share calculation for the three and six months ended July 31, 2015 for the adjustment of the noncontrolling interest with redemption feature to its calculated redemption value, recorded directly to retained earnings.

The effect of the conversion of the 4.00% Debentures was anti-dilutive for the three and six months ended July 31, 2016 and 2015 and therefore excluded from the computation of diluted net income (loss) per share. The conversion feature of the 4.00% Debentures, which allows for settlement in cash or a combination of cash and common stock, is further described in Note 6. “Notes Payable.”

The following details the adjustments to net income (loss) excluded from the computation of diluted net income (loss) per share:



	Three months ended July 31,				Six months ended July 31,
	2016		2015		2016		2015
Adjustment for convertible debt interest, net of tax to be forfeited upon conversion of 4.00% Debentures	$	2,074	$	2,075	$	2,074	$	2,075

The following details shares excluded from the computation of diluted net income (loss) per share:



	Three months ended July 31,		Six months ended July 31,
	2016	2015	2016	2015
Shares of common stock for restricted stock units	28	—	2,265	11
Shares of common stock for stock options	—	—	1,249	—
Shares of common stock for ESPP purchase rights	742	—	776	572
Shares of common stock for convertible debt	756	2,825	205	2,489
Total anti-dilutive shares excluded	1,526	2,825	4,495	3,072

The restricted stock units, stock options, ESPP purchase rights, and the 4.00% Debentures were determined to be anti-dilutive either because we incurred a net loss for the period or as a result of applying the treasury stock method.