Earnings Per Share

9 Months Ended

Sep. 30, 2016

Basic net loss per share attributable to Vertex common shareholders is based upon the weighted-average number of common shares outstanding during the period, excluding restricted stock and restricted stock units that have been issued but are not yet vested. Diluted net loss per share attributable to Vertex common shareholders is based upon the weighted-average number of common shares outstanding during the period plus additional weighted-average common equivalent shares outstanding during the period when the effect is dilutive.

The Company did not include the securities in the following table in the computation of the net loss per share attributable to Vertex common shareholders calculations because the effect would have been anti-dilutive during each period:



	Three Months Ended September 30,		Nine Months Ended September 30,
	2016	2015	2016	2015
	(in thousands)
Stock options	12,947	12,025	12,947	12,025
Unvested restricted stock and restricted stock units	3,624	3,367	3,624	3,367