Stockholders’ Equity

The Company maintains the following stock plans: the ESPP, the 2013 Equity Incentive Plan and the 2014 Inducement Equity Incentive Plan (the “2014 Inducement Plan”). The expiration of the 1999 Stock Option Plan (“1999 Plan”) in fiscal 2010 did not affect awards outstanding, which continue to be governed by the terms and conditions of the 1999 Plan.

As of July 31, 2016, $41.5 million has been withheld on behalf of employees for future purchases under the ESPP and is recorded in accounts payable, accrued expenses and other liabilities.

Prior to February 1, 2006, options issued under the Company’s stock option plans generally had a term of 10 years. From February 1, 2006 through July 2013, options issued had a term of five years. After July 2013, options issued have a term of seven years.

During fiscal 2016, the Company granted a performance-based restricted stock unit award to the Chairman of the Board and Chief Executive Officer subject to vesting based on a performance-based condition and a service-based condition. At the end of the three year service period based on the Company's share price performance, as it relates to the performance condition, these performance-based restricted stock units will vest simultaneously.

Stock activity excluding the ESPP is as follows:



			Options Outstanding
	Shares Available for Grant		Outstanding Stock Options		Weighted- Average Exercise Price		Aggregate Intrinsic Value (in thousands)
Balance as of January 31, 2016	46,879,908		26,258,798		$	56.26
Increase in shares authorized:
2013 Equity Incentive Plan	135,013
2014 Inducement Plan	1,013,581
Assumed equity plans	2,457,103
Options granted under all plans	(1,565,806	)	1,565,806		55.38
Restricted stock activity	(5,200,112	)
Stock grants to board and advisory board members	(98,689	)
Exercised	0		(3,117,908	)	38.70
Plan shares expired	(59,756	)
Canceled	436,380		(436,380	)	65.36
Balance as of July 31, 2016	43,997,622		24,270,316		$	58.30	$	570,515
Vested or expected to vest			22,438,870		$	57.32	$	549,383
Exercisable as of July 31, 2016			9,407,899		$	45.43	$	342,144

The total intrinsic value of the options exercised during the six months ended July 31, 2016 and 2015 was $124.8 million and $198.2 million, respectively. The intrinsic value is the difference between the current market value of the stock and the exercise price of the stock option.

The weighted-average remaining contractual life of vested and expected to vest options is approximately 4.7 years.

As of July 31, 2016, options to purchase 9,407,899 shares were vested at a weighted average exercise price of $45.43 per share and had a remaining weighted-average contractual life of approximately 3.4 years. The total intrinsic value of these vested options as of July 31, 2016 was $342.1 million.

The following table summarizes information about stock options outstanding as of July 31, 2016:



	Options Outstanding				Options Exercisable
Range of Exercise Prices	Number Outstanding	Weighted- Average Remaining Contractual Life (Years)	Weighted- Average Exercise Price		Number of Shares	Weighted- Average Exercise Price
$0.86 to $39.09	5,009,819	2.1	$	31.52	4,222,980	$	32.46
$40.19 to $52.28	417,295	3.8	43.83		200,068	43.62
$52.30	3,558,218	4.3	52.30		2,177,833	52.30
$53.60 to $58.86	1,133,703	5.0	55.51		328,767	55.83
$59.34	5,922,503	5.3	59.34		2,227,005	59.34
$59.37 to $80.62	2,579,717	6.1	69.98		251,246	68.56
$80.99 to $82.55	5,649,061	6.3	81.02		0	0.00
	24,270,316	4.8	$	58.30	9,407,899	$	45.43

Restricted stock activity is as follows:



	Restricted Stock Outstanding
	Outstanding		Weighted- Average Exercise Price		Aggregate Intrinsic Value (in thousands)
Balance as of January 31, 2016	21,294,585		$	0.001
Granted- restricted stock units and awards	4,343,446		0.001
Canceled	(952,325	)	0.001
Vested and converted to shares	(3,528,045	)	0.001
Balance as of July 31, 2016	21,157,661		$	0.001	$	1,730,697
Expected to vest	18,103,499				$	1,480,866

The restricted stock, which upon vesting entitles the holder to one share of common stock for each share of restricted stock, has an exercise price of $0.001 per share, which is equal to the par value of the Company’s common stock, and generally vests over 4 years.

The weighted-average grant date fair value of the restricted stock issued for the six months ended July 31, 2016 and 2015 was $75.86 and $70.73, respectively.

Common Stock

The following number of shares of common stock were reserved and available for future issuance at July 31, 2016:



Options outstanding	24,270,316
Restricted stock awards and units and performance stock units outstanding	21,157,661
Stock available for future grant:
2013 Equity Incentive Plan	42,446,150
2014 Inducement Plan	1,465,329
Amended and Restated 2004 Employee Stock Purchase Plan	5,289,597
Acquired equity plans	86,143
Convertible Senior Notes	17,308,880
Warrants	17,308,880
	129,332,956