Net Loss Per Share Attributable to Vertex Common Shareholders

6 Months Ended

Jun. 30, 2014

Earnings Per Share [Abstract]

Net Loss Per Share Attributable to Vertex Common Stockholders

Net Loss Per Share Attributable to Vertex Common Shareholders

Basic net loss attributable to Vertex per common share 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 attributable to Vertex per common share calculations because the effect would have been anti-dilutive during each period:

	Three Months Ended June 30,		Six Months Ended June 30,
	2014	2013	2014	2013
	(in thousands)
Stock options	14,549	16,802	14,549	16,802
Unvested restricted stock and restricted stock units	2,584	2,600	2,584	2,600