Net Loss per Share Attributable to Portola Common Stockholders

9 Months Ended

Sep. 30, 2016

Net Loss per Share Attributable to Portola Common Stockholders

9. Net Loss per Share Attributable to Portola Common Stockholders

Basic net loss per share attributable to Portola Common Stockholders has been computed by dividing the net loss attributable to Portola Common Stockholders by the weighted-average number of shares of Common Stock outstanding during the period. Diluted net loss per share attributable to Portola Common Stockholders is calculated by dividing net loss attributable to Portola Common Stockholders by the weighted average number of shares of Common Stock and potential dilutive securities outstanding during the period.

The following common stock equivalent shares were excluded from the computation of diluted net loss per share attributable to Portola Common Stockholders for the three and nine months ended September 30, 2016 and 2015 because including them would have been anti-dilutive:

	2016		2015
Stock options to purchase common stock		5,888,149		4,712,354
Performance stock options		271,122		—
Common stock warrants		1,500		1,500
Restricted stock units		559,077		191,773
Performance stock units		286,052		165,000
Employee stock purchase plan		10,019		4,327