Stock-based Compensation Expense (Tables)

3 Months Ended

Apr. 30, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of summary of restricted stock activity

A summary of restricted stock activity for the three months ended April 30, 2018, is as follows:

	Unvested Restricted Stock Units		Weighted average grant date fair value per share
	(in thousands)
Unvested restricted stock units at January 31, 2018	5,670.7		$	82.94
Granted	391.9		143.47
Vested	(712.4	)	82.44
Canceled/Forfeited	(279.7	)	80.85
Performance Adjustment (1)	29.9		101.74
Unvested restricted stock units at April 30, 2018	5,100.4		$	88.55

 _______________

(1) Based on Autodesk's financial results and relative total stockholder return for the fiscal 2018 performance period. The performance stock units were attained at rates ranging from 90.0% to 117.6% of the target award.

Schedule of summary of the ESPP activity

A summary of the ESPP activity for three months ended April 30, 2018 and 2017, is as follows:

	Three Months Ended April 30,
	2018		2017
Issued shares	0.5		1.1
Average price of issued shares	$	88.45	$	38.34
Weighted average grant date fair value of awards granted under the ESPP (1)	$	37.64	$	25.13

 _______________

(1)

Calculated as of the award grant date using the Black-Scholes Merton (“BSM") option pricing model.

Schedule of stock-based compensation expense

The following table summarizes stock-based compensation expense for the three months ended April 30, 2018 and 2017, respectively, as follows:

	Three Months Ended April 30,
	2018			2017
Cost of maintenance and subscription revenue	$	2.7		$	2.8
Cost of other revenue	0.8			1.1
Marketing and sales	24.0			26.4
Research and development	17.8			21.2
General and administrative	9.1			15.3
Stock-based compensation expense related to stock awards and ESPP purchases	54.4			66.8
Tax benefit	(0.4		)	—
Stock-based compensation expense related to stock awards and ESPP purchases, net of tax	$	54.0		$	66.8

Schedule of assumptions to estimate the fair value of stock-based awards

Autodesk uses the following assumptions to estimate the fair value of stock-based awards:

 

	Three Months Ended April 30, 2018		Three Months Ended April 30, 2017
	Performance Stock Unit	ESPP	Performance Stock Unit	ESPP
Range of expected volatilities	35.7%	33.5 - 37.5%	31.8%	31.4 - 33.7%
Range of expected lives (in years)	N/A	0.5 - 2.0	N/A	0.5 - 2.0
Expected dividends	—%	—%	—%	—%
Range of risk-free interest rates	2.0%	1.9 - 2.3%	1.0%	0.9 - 1.3%