Net Income (Loss) Per Share

12 Months Ended

Jan. 31, 2021

Basic net income (loss) per share is computed using the weighted average number of shares of common stock outstanding for the period, excluding stock options and restricted stock units. Diluted net income (loss) per share is based upon the weighted average number of shares of common stock outstanding for the period and potentially dilutive common stock, including the effect of stock options and restricted stock units under the treasury stock method. The following table sets forth the computation of the numerators and denominators used in the basic and diluted net income (loss) per share amounts:


	Fiscal Year Ended January 31,
	2021		2020		2019
Numerator:
Net income (loss)	$	1,208.2	$	214.5	$	(80.8)
Denominator:
Denominator for basic net income (loss) per share—weighted average shares	219.4		219.7		218.9
Effect of dilutive securities (1)	2.7		2.8		—
Denominator for dilutive net income (loss) per share	222.1		222.5		218.9
Basic net income (loss) per share	$	5.51	$	0.98	$	(0.37)
Diluted net income (loss) per share	$	5.44	$	0.96	$	(0.37)

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(1)The effect of dilutive securities of 3.1 million shares for the fiscal year ended January 31, 2019, have been excluded from the calculation of diluted net loss per share as those shares would have been anti-dilutive due to the net loss incurred during that fiscal year.

The computation of diluted net income (loss) per share does not include shares that are anti-dilutive under the treasury stock method because their exercise prices are higher than the average market value of Autodesk’s stock during the fiscal year. The effect of 0.1 million potentially anti-dilutive shares were excluded from the computation of diluted net income per share for the fiscal year ended January 31, 2021. There were no potentially anti-dilutive shares excluded from the computation of diluted net income per share for the fiscal year ended January 31, 2020. The effect of 0.5 million potentially anti-dilutive shares were excluded from the computation of net loss per share for the fiscal year ended January 31, 2019.