Stock-based Compensation Expense (Tables)

3 Months Ended

Apr. 30, 2011

Schedule of Share-based Compensation, Stock Options, Activity

A summary of stock option activity for the three months ended April 30, 2011 is as follows:

	Number of Shares			Weighted average exercise price per share
	(in millions)
Options outstanding at January 31, 2011		30.4		$	28.93
Granted		4.6			41.94
Exercised		(3.4	)		26.06
Cancelled		(0.3	)		29.42
Options outstanding at April 30, 2011		31.3		$	31.17
Options exercisable at April 30, 2011		18.9		$	30.58
Options available for grant at April 30, 2011		12.6

Intrinsic Value of Options Exercised and Weighted Average Grant Date Fair Value of Stock Options Granted

The intrinsic value of options exercised is calculated as the difference between the exercise price of the option and the market value of the stock on the date of exercise. The weighted average grant date fair value of stock options granted is calculated, as of the stock option grant date, using the Black-Scholes-Merton option pricing model.

	Three Months Ended
	April 30, 2011		April 30, 2010
Pre-tax intrinsic value of options exercised	$	59.6	$	11.9
Weighted average grant date fair value per share of stock options granted	$	14.40	$	9.17

Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range

The following table summarizes information about options outstanding and exercisable at April 30, 2011:

	Options Exercisable								Options Outstanding
	Number of Shares (in millions)		Weighted average contractual life (in years)		Weighted average exercise price		Aggregate intrinsic value(1) (in millions)		Number of Shares (in millions)		Weighted average contractual life (in years)		Weighted average exercise price		Aggregate intrinsic value(1) (in millions)
Range of per-share exercise prices:
$0.61 — $17.37		4.5			$	12.73				6.6			$	13.43
$17.39 — $29.49		3.2				26.43				6.9				27.61
$29.50 — $38.00		5.9				33.93				7.3				33.36
$38.08 — $45.29		4.6				43.83				9.7				42.86
$47.24 — $49.80		0.7				48.60				0.8				48.61
		18.9		2.7	$	30.58	$	275.2		31.3		4.4	$	31.17	$	435.6

⁽¹⁾  Represents the total pre-tax intrinsic value, based on Autodesk’s closing stock price of $44.98 per share as of April 30, 2011, which would have been received by the option holders had all option holders exercised their options as of that date.

Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity

A summary of restricted stock award and restricted stock unit activity for the three months ended April 30, 2011 is as follows:

	Unreleased Restricted Stock			Weighted average grant date fair value
	(in thousands)
Unreleased restricted stock at January 31, 2011		1,426.7		$	30.43
Awarded		675.0			43.15
Released		(12.7	)		25.68
Forfeited		(33.3	)		29.63
Unreleased restricted stock at April 30, 2011		2,055.7		$	34.65

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs

The following table summarizes stock-based compensation expense for the three months ended April 30, 2011 and 2010, respectively, as follows:

	Three Months Ended April 30, 2011			Three Months Ended April 30, 2010
Cost of license and other revenue	$	0.9		$	0.8
Marketing and sales		11.8			10.6
Research and development		8.9			8.3
General and administrative		4.3			4.6
Stock-based compensation expense related to stock awards and ESP Plan purchases		25.9			24.3
Tax benefit		(7.6	)		(6.8	)
Stock-based compensation expense related to stock awards and ESP Plan purchases, net of tax	$	18.3		$	17.5

Schedule of Share Based Payment Award, Stock Option Plan and Employee Stock Purchase Plan, Valuation Assumptions

Autodesk uses the Black-Scholes-Merton option-pricing model to estimate the fair value of stock-based awards based on the following assumptions:

	Three Months Ended April 30, 2011		Three Months Ended April 30, 2010
	Stock Option Plans	ESP Plan	Stock Option Plans	ESP Plan
Range of expected volatilities	40 - 43%	34 - 37%	40 - 43%	33% - 45%
Range of expected lives (in years)	2.6 - 4.4	0.5 -2.0	2.7 - 3.7	0.50 -2.0
Expected dividends	0%	0%	0%	0%
Range of risk-free interest rates	0.9 - 1.9%	0.2 - 0.8%	1.3 - 1.9%	0.2 - 1.1%
Expected forfeitures	10.5%	10.5%	13.5%	13.5%