Stock-Based Compensation

Stock Based Compensation

In February 2014, our stockholders approved an amendment to the Microsemi Corporation 2008 Performance Incentive Plan (the "2008 Plan"). The amendment a) increased the share limit by an additional 4.8 million shares so that the amended aggregate share limit for the 2008 Plan is 33.3 million shares; and b) extended the Company's authority to grant awards under the 2008 Plan intended to qualify as "performance-based awards" within the meaning of Section 162(m) of the U.S. Internal Revenue Code through the first annual meeting of stockholders that occurs in 2019. The 2008 Plan's termination date of December 5, 2021 remained unchanged, as did the number of shares counted against the share limit for every one share issued in connection with a full-value award, which remained 2.41.

Except as described in this paragraph, shares that are subject to or underlie awards which expire or for any reason, are cancelled or terminated, are forfeited, fail to vest, or for any other reason are not paid or delivered under the 2008 Plan will again be available for subsequent awards under the 2008 Plan. Shares that are exchanged by a participant or withheld by the Company as full or partial payment in connection with any award granted under the 2008 Plan that is a full-value award, as well as any shares exchanged by a participant or withheld by the Company or one of its subsidiaries to satisfy the tax withholding obligations related to any full-value award granted under the 2008 Plan will be available for subsequent awards under the 2008 Plan. Shares that are exchanged by a participant or withheld by the Company to pay the exercise price of a stock option or stock appreciation right granted under the 2008 Plan, as well as any shares exchanged or withheld to satisfy the tax withholding obligations related to any such award, will not be available for subsequent awards under the 2008 Plan.

Awards authorized by the 2008 Plan include options, stock appreciation rights, restricted stock, stock bonuses, stock units, performance share awards, and other cash or share-based awards. The shares issued under the 2008 Plan may be newly issued or shares held by Microsemi as treasury stock. The maximum term of a stock option grant or a stock appreciation right granted under the 2008 Plan is 6 years. For the quarter and six months ended March 29, 2015, stock-based compensation expense was $11.8 million and $22.5 million, respectively. For the quarter and six months ended March 30, 2014, stock-based compensation expense was $11.5 million and $21.6 million, respectively.

The quantity of restricted shares and performance stock units at target levels granted and their weighted-average fair value are as follows (quantities in thousands):



Six Months Ended	Quantity	Weighted-Average Fair Value per Award
March 30, 2014
Restricted shares	1,433	$	24.64
Performance stock units	332	$	26.27
Stock options assumed from acquisition	578	$	7.01

March 29, 2015
Restricted shares	1,238	$	29.04
Performance stock units	403	$	27.54

Restricted Shares

Compensation expense for restricted shares was calculated based on the closing price of our common stock on the date of grant and the restricted shares are subject to forfeiture if a participant does not meet length of service requirements. Restricted stock awards granted to employees typically vest over a three year period and awards granted to non-employee directors vest in accordance with our director compensation policy.

Performance Stock Units

Compensation expense for performance stock units was calculated based upon expected achievement of the performance metrics specified in the grant and the closing price of our common stock on the date of grant, or when a grant contains a market condition, the grant date fair value using a Monte Carlo simulation. Vesting of performance units issued in 2013, 2014 and 2015 contain a market condition and the Monte Carlo simulation incorporates estimates of the potential outcomes of the market condition on the fair value date of each award.

Performance stock units granted in 2013 are eligible to vest based on our achievement of net sales and earnings per share (subject to certain adjustments) levels for 2013, 2014 and 2015. For these performance stock units, 25% of each performance-based award opportunity will be subject to the net sales metric for the performance period and 75% will be subject to the earnings per share metric for the performance period. The maximum percentage is further adjusted by our total shareholder return relative to a peer group selected by the Compensation Committee, up to a maximum of 125%.

Performance units granted in 2014 and 2015 are eligible to vest based on our rate of growth for net sales and earnings per share (subject to certain adjustments) relative to the growth rates for that metric over the relevant performance period for a peer group of companies. The performance period for the 2014 grants include our fiscal years 2014, 2015 and 2016 and the performance period for the 2015 grants include our fiscal years 2015, 2016 and 2017. A portion of the performance units may vest based on performance after each fiscal year of the performance period.

For the 2014 grants, 40% of each performance-based award opportunity will be subject to the net sales metric for the performance period and 60% will be subject to the earnings per share metric for the performance period. The maximum percentage for a particular metric is 200% of the "target" number of units subject to the award related to that metric. For the 2015 grant, 70% of each performance-based award opportunity will be subject to the net sales metric for the performance period and 30% will be subject to the earnings per share metric for the performance period. The maximum percentage for a particular metric is 225% of the "target" number of units subject to the award related to that metric. The maximum percentage is further adjusted by our total shareholder return relative to a peer group selected by the Compensation Committee. For the 2014 grant, the maximum adjustment is 125% and for the 2015 grant, the maximum adjustment is 150%.

Stock Options

We assumed unvested stock options related to our acquisition of Microsemi – FTD in 2014 with a weighted-average exercise price of $20.08 per stock option. We derived a weighted-average fair value per stock option using the Black-Scholes option pricing model.