Net Loss Per Share Attributable to Vertex Common Shareholders

9 Months Ended

Sep. 30, 2014

Earnings Per Share [Abstract]

Net Loss Per Share Attributable to Vertex Common Shareholders

Net Loss Per Share Attributable to Vertex Common Shareholders

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 described in the following table in the computation of the net loss per share attributable to Vertex common shareholder calculations because the effect would have been anti-dilutive during each period:

	Three Months Ended September 30,		Nine Months Ended September 30,
	2014	2013	2014	2013
	(in thousands)
Stock options	13,097	16,807	13,097	16,807
Unvested restricted stock and restricted stock units	2,672	2,838	2,672	2,838