Net Loss per Share Attributable to Portola Common Stockholders

12 Months Ended

Dec. 31, 2018

Earnings Per Share [Abstract]

Net Loss per Share Attributable to Portola Common Stockholders

12. Net Loss per Share Attributable to Portola Common Stockholders

The following outstanding shares of common stock equivalents were excluded from the computation of diluted net loss per share attributable to Portola common stockholders for the periods presented because including them would have been antidilutive:

	Year Ended December 31,
	2018		2017		2016
Stock options to purchase Common Stock		7,507,690		6,514,538		5,817,116
Performance stock options		143,335		164,783		180,752
Restricted stock units		979,278		600,334		546,507
Performance stock units		153,503		304,754		285,866
Employee stock purchase plan		96,219		32,325		37,368
Common stock warrants		1,500		1,500		1,500