Net Loss per Share

9 Months Ended

Sep. 30, 2015

Net Loss per Share

Basic net loss per share is computed by dividing net loss by the weighted average number of common shares outstanding. Diluted net loss per share is computed by dividing net loss by the weighted average number of common shares outstanding including the effect of common share equivalents. Diluted net loss per share assumes the issuance of potential dilutive common shares outstanding for the period and adjusts for any changes in income and the repurch ase of common shares that would have occurred from the assumed issuance, unless such effect is anti-dilutive. The number of options and warrants for the purchase of common stock that were excluded from the computations of net loss per common share, for the three and nine months ended September 30, 2015 were 8,331,020 and 15,360,828, respectively, and for the three and nine months ended September 30, 2014 were 6,742,092.

The following tables set forth the computation of diluted net loss per weighted average number of shares outstanding attributable to Synthetic Biologics, Inc. and Subsidiaries for the three and nine months ended September 30, 2015, and 2014 (in thousands except share and per share amounts) :

	Three months ended September 30, 2015						Nine months ended September 30, 2015
	Net loss (Numerator)		Shares (Denominator)		Per Share Amount		Net Loss (Numerator)		Shares (Denominator)		Per Share Amount
Net loss - Basic	$	(6,774)		85,974,751	$	(0.08)	$	(32,755)		77,300,375	$	(0.42)

Change in fair value of warrant liability	$	(4,141)		-	$	-	$	-		-	$	-

Dilutive shares related to warrants	$	-		1,610,352	$	-	$	-		-	$	-

Net loss - Dilutive	$	(10,915)		87,585,103	$	(0.12)	$	(32,755)		77,300,375	$	(0.42)

	Three months ended September 30, 2014						Nine months ended September 30, 2014
	Net loss (Numerator)		Shares (Denominator)		Per Share Amount		Net Loss (Numerator)		Shares (Denominator)		Per Share Amount

Net loss - Basic	$	(4,910)		58,453,528	$	(0.08)	$	(13,304)		58,356,025	$	(0.23)

Change in fair value of warrant liability	$	-		-	$	-	$	-		-	$	-

Dilutive shares related to warrants	$	-		-	$	-	$	-		-	$	-

Net loss - Dilutive	$	(4,910)		58,453,528	$	(0.08)	$	(13,304)		58,356,025	$	(0.23)