Stock-based Compensation

The majority of awards consist of restricted stock units and to a lesser degree, stock options. Employees vest in restricted stock units and stock options ratably over the corresponding service term, generally one to four years. The Company’s stock options expire 10 years from the date of grant. Restricted stock units are payable in shares of the Company’s common stock as the periodic vesting requirements are satisfied. The value of a restricted stock unit is based upon the fair market value of the Company’s common stock on the date of grant. The value of restricted stock units is determined using the intrinsic value method and is based on the number of shares granted and the quoted price of the Company’s common stock on the date of grant. Alternatively, the Company used the Black-Scholes option pricing model to determine the fair value of its stock options. Compensation expense related to restricted stock units and stock options is recognized over the vesting period. The Company has adopted a number of stock-based compensation plans as discussed below.

1998 Equity Incentive Plan. In November 1998, the Company adopted the 1998 Equity Incentive Plan, or the 1998 Plan, which provided for discretionary grants of non-qualified and incentive stock options, stock purchase awards and stock bonuses for employees and other service providers. The 1998 Plan expired on November 11, 2008 and no shares remain available for awards under the 1998 Plan. Upon certain changes in control of the Company, all outstanding and unvested options or stock awards under the 1998 Plan will vest at the rate of 50%, unless assumed or substituted by the acquiring entity. During the fiscal years 2013 and 2012, the Company issued no stock options, stock purchase awards or stock bonuses under this plan. As of September 30, 2013, there were options to purchase 52,753 shares outstanding under the 1998 Plan.

2011 Employee Stock Purchase Plan. In April 2012, the Board of Directors amended and restated the Company’s 1999 Employee Stock Purchase Plan, or the Employee Stock Purchase Plan. A total of 6,000,000 shares of common stock have been reserved for issuance under the Employee Stock Purchase Plan. The Employee Stock Purchase Plan permits eligible employees to acquire shares of the Company’s common stock through periodic payroll deductions of up to 15% of base compensation. No employee may purchase more than 10,000 shares during an offering period. In addition, no employee may purchase more than $25,000 worth of stock, determined by the fair market value of the shares at the time such option is granted, in one calendar year. The Employee Stock Purchase Plan has been implemented in a series of offering periods, each 6 months in duration. The price at which the common stock may be purchased is 85% of the lesser of the fair market value of the Company’s common stock on the first day of the applicable offering period or on the last day of the respective purchase period. As of September 30, 2013 there were 1,014,179 shares available for awards under the Employee Stock Purchase Plan.

2000 Equity Incentive Plan. In July 2000, the Company adopted the 2000 Employee Equity Incentive Plan, or the 2000 Plan, which provided for discretionary grants of non-qualified stock options, stock purchase awards and stock bonuses for non-executive employees and other service providers. A total of 7,000,000 shares of common stock were reserved for issuance under the 2000 Plan. Upon certain changes in control of the Company, all outstanding and unvested options or stock awards under the 2000 Plan will vest at the rate of 50%, unless assumed or substituted by the acquiring entity. As of September 30, 2013, there were options to purchase 40,958 shares outstanding and no shares available for awards under the 2000 Plan. The Company terminated the 2000 Plan effective November 1, 2008 and no additional shares may be issued from the 2000 Plan.

Acquisition Related Incentive Plans. In July 2003, the Company adopted the uRoam Acquisition Equity Incentive Plan, or the uRoam Plan, in connection with the hiring of the former employees of uRoam, Inc. A total of 500,000 shares of common stock were reserved for issuance under the uRoam Plan. The plan provided for discretionary grants of non-qualified and incentive stock options, stock purchase awards and stock bonuses. The Company has not granted any stock purchase awards or stock bonuses under this plan. As of September 30, 2013 there were options to purchase 1,650 shares outstanding and no shares available for additional awards under the uRoam Plan.

In July 2004, the Company adopted the MagniFire Acquisition Equity Incentive Plan, or the MagniFire Plan, in connection with the hiring of the former employees of MagniFire Websystems, Inc. A total of 830,000 shares of common stock were reserved for issuance under the MagniFire Plan. The plan provided for discretionary grants of non-qualified and incentive stock options, stock purchase awards and stock bonuses. The Company has not granted any stock purchase awards or stock bonuses under this plan. As of September 30, 2013 there were options to purchase 2,690 shares outstanding and no shares available for additional awards under the MagniFire Plan.

In connection with the Company’s acquisition of Acopia in the fourth quarter of fiscal year 2007, the Company assumed the Acopia 2001 Stock Incentive Plan, or the Acopia Plan. Unvested options to acquire Acopia’s common stock were converted into options to acquire the Company’s common stock in connection with the acquisition. A total of 2,230,703 shares of common stock were reserved for issuance under the Acopia Plan. The plan provided for discretionary grants of non-qualified and incentive stock options, restricted stock awards and other stock-based awards to persons who were employees, officers, directors, consultants or advisors to Acopia on or prior to September 12, 2007. During the fiscal year 2013, the Company issued no stock options or restricted stock units under the Acopia Plan. As of September 30, 2013, there were options to purchase 12,509 shares outstanding and no shares available for awards under the Acopia Plan. The Company terminated the Acopia Plan effective November 1, 2008 and no additional shares may be issued from the Acopia Plan.

In February 2012, the Company adopted the Traffix Acquisition Equity Incentive Plan, or the Traffix Acquisition Plan. The Traffix Acquisition Plan provided for discretionary grants of non-statutory stock options and stock units for employees, directors and consultants of Traffix Communication Systems Ltd. to whom the Company offered employment in connection with the Company’s acquisition of Traffix. A total of 75,000 shares of common stock were reserved for issuance under the Traffix Acquisition Plan. Upon certain changes in control of the Company, the surviving entity will either assume or substitute all outstanding stock awards under the Traffix Acquisition Plan or the vesting of 50% of the stock awards shall be accelerated. During the fiscal year 2013, the Company issued no stock options or restricted stock units under the Traffix Acquisition Plan. As of September 30, 2013, there were no options outstanding, 33,693 restricted stock units outstanding and no shares available for awards under the Traffix Acquisition Plan.

In connection with the Company’s acquisition of Traffix Systems in the second quarter of fiscal year 2012, the Company assumed the Traffix 2007 Israeli Employee Share Option Plan, or the Traffix Plan. Unvested options to acquire Traffix’s common stock were converted into options to acquire the Company’s common stock in connection with the acquisition. A total of 106,829 shares of common stock were reserved for issuance under the Traffix Plan. The plan provided for grants of stock options to persons who were employees, officers, directors, consultants or advisors to Traffix on or prior to February 21, 2012. During the fiscal year 2013, the Company issued no stock options or restricted stock units under the Traffix Plan. As of September 30, 2013, there were options to purchase 56,758 shares outstanding and no shares available for additional awards under the Traffix Plan.

In February 2013, the Company adopted the LineRate Acquisition Equity Incentive Plan, or the LineRate Acquisition Plan. The LineRate Acquisition Plan provided for discretionary grants of non-statutory stock options and stock units for employees, directors and consultants of LineRate Systems to whom the Company offered employment in connection with the Company’s acquisition of LineRate Systems. A total of 100,000 shares of common stock were reserved for issuance under the LineRate Acquisition Plan. Upon certain changes in control of the Company, the surviving entity will either assume or substitute all outstanding stock awards under the LineRate Acquisition Plan or the vesting of 50% of the stock awards shall be accelerated. During the fiscal year 2013, the Company issued no stock options and 100,000 restricted stock units under the LineRate Acquisition Plan. As of September 30, 2013, there were no options outstanding, 100,000 restricted stock units outstanding and no shares available for awards under the LineRate Acquisition Plan.

In connection with the Company’s acquisition of LineRate Systems in the second quarter of fiscal year 2013, the Company assumed the LineRate Systems, Inc. Third Amended and Restated 2009 Equity Incentive Plan, or the LineRate Plan. Unvested options to acquire LineRate Systems' common stock were converted into options to acquire the Company’s common stock in connection with the acquisition. A total of 201,478 shares of common stock were reserved for issuance under the LineRate Plan. The plan provided for grants of stock options to persons who were employees, officers, directors, consultants or advisors to LineRate Systems on or prior to February 11, 2013. During the fiscal year 2013, the Company issued 52,397 stock options as part of such conversion under the LineRate Plan. As of September 30, 2013, there were options to purchase 42,901 shares outstanding and 3,574 shares available for additional awards under the LineRate Plan.

In September 2013, the Company adopted the Versafe Acquisition Equity Incentive Plan, or the Versafe Acquisition Plan. The Versafe Acquisition Plan provided for discretionary grants of non-statutory stock options and stock units for employees, directors and consultants of Versafe Ltd. to whom the Company offered employment in connection with the Company’s acquisition of Versafe. A total of 60,000 shares of common stock were reserved for issuance under the Versafe Acquisition Plan. Upon certain changes in control of the Company, the surviving entity will either assume or substitute all outstanding stock awards under the Versafe Acquisition Plan or the vesting of 50% of the stock awards shall be accelerated. During the fiscal year 2013, the Company issued no stock options and no restricted stock units under the Versafe Acquisition Plan. As of September 30, 2013, there were no options outstanding, no restricted stock units outstanding and 60,000 shares available for awards under the Versafe Acquisition Plan.

2005 Equity Incentive Plan. In December 2004, the Company adopted the 2005 Equity Incentive Plan, or the 2005 Plan, which provides for discretionary grants of non-statutory stock options and stock units for employees, including officers, and other service providers. A total of 12,400,000 shares of common stock have been reserved for issuance under the 2005 Plan. Upon certain changes in control of the Company, all outstanding and unvested options or stock awards under the 2005 Plan will vest at the rate of 50%, unless assumed or substituted by the acquiring entity. During the fiscal year 2013, the Company issued no stock options and 456,837 restricted stock units under the 2005 Plan. As of September 30, 2013, there were no options outstanding, 926,035 restricted stock units outstanding and 2,135,162 shares available for new awards under the 2005 Plan.

A majority of the restricted stock units the Company grants to its employees vest quarterly over a two-year period. The restricted stock units under all plans were granted during fiscal years 2013, 2012 and 2011 with a per-share weighted average fair value of $86.69, $99.63 and $94.99, respectively. The fair value of restricted stock vested during fiscal years 2013, 2012 and 2011 was $97.5 million, $93.8 million and $145.0 million, respectively.

A summary of restricted stock unit activity under the 2005 Plan is as follows:



	Outstanding Stock Units		Weighted Average Grant Date Fair Value
Balance, September 30, 2012	1,717,444		$	95.43
Units granted	456,837		89.38
Units vested	(1,078,607	)	89.31
Units cancelled	(169,639	)	94.16
Balance, September 30, 2013	926,035		$	95.47

A summary of stock option activity under all of the Company’s plans is as follows:



	Options Outstanding
	Number of Shares		Weighted Average Exercise Price per Share
Balance, September 30, 2012	284,474		$	11.73
Options granted	52,397		1.32
Options exercised	(125,701	)	10.67
Options cancelled	(951	)	3.95
Balance, September 30, 2013	210,219		$	9.80

All stock options granted in fiscal year 2013 were assumed as part of the acquisition of LineRate Systems in the second fiscal quarter. All stock options granted in fiscal year 2012 were assumed as part of the acquisition of Traffix Systems in the second fiscal quarter. No stock options were granted in fiscal years 2011.

The total intrinsic value of options exercised during fiscal 2013, 2012 and 2011 was $9.8 million, $13.2 million and $15.2 million, respectively.



	Number of Shares	Weighted Average Remaining Contractual Life (in Years)	Weighted Average Exercise Price per Share		Aggregate Intrinsic Value(1)
					(In thousands)
Stock options outstanding	210,219	4.37	$	9.80	$	15,967
Exercisable	140,054	2.46	$	13.48	$	10,123
Vested and expected to vest	204,688	4.27	$	10.01	$	15,506


(1)	Aggregate intrinsic value represents the difference between the fair value of the Company’s common stock underlying these options at September 30, 2013 and the related exercise prices.

As of September 30, 2013, equity based awards (including stock options and restricted stock units) are available for future issuance as follows:



	Awards Available for Grant
Balance, September 30, 2012	2,422,360
Granted	(609,234	)
Cancelled	172,324
Additional shares reserved (terminated), net	213,286
Balance, September 30, 2013	2,198,736