Basic and Diluted Net Loss Per Share

6 Months Ended

Jun. 30, 2012

Basic and Diluted Net Loss Per Share [Abstract]

BASIC AND DILUTED NET LOSS PER SHARE

NOTE 3 - BASIC AND DILUTED NET LOSS PER SHARE

Basic net loss per share has been computed by dividing the net loss by the weighted-average number of shares of common stock outstanding during the period. Diluted net loss per share is calculated by dividing net loss by the weighted average number of shares of common stock and potential dilutive securities outstanding during the period.

Because Sangamo is in a net loss position, diluted net loss per share excludes the effects of common stock equivalents consisting of options, which are all anti-dilutive. The total stock options outstanding excluded from the calculation of diluted net loss per share for the three and six months ended June 30, 2012 and 2011 were 8,240,363 and 7,890,571, respectively.