Earnings Per Share

3 Months Ended

Mar. 31, 2020

NOTE C—EARNINGS PER SHARE

Basic earnings per common share is computed by dividing income available to common stockholders by the weighted average number of common shares outstanding for the period. Diluted earnings per common share is computed similarly to basic earnings per common share except that the weighted average number of common shares outstanding is increased to include the number of additional common shares that would have been outstanding if the potentially dilutive common shares had been issued.

Diluted net earnings per share assumes the conversion of contingently convertible securities and stock options under the treasury stock method, if dilutive. Contingently convertible securities and stock options are excluded from the calculation of fully diluted earnings per share if they are anti-dilutive, including when we incur a loss from continuing operations.

The following table shows the computation of basic and diluted earnings per share for the three months ended March 31, 2020 and 2019:



In thousands, except per share amounts	Three Months Ended March 31,
	2020			2019
Numerator:
Net loss attributable to U.S. Silica Holdings, Inc.	$	(72,345	)	$	(19,324	)

Denominator:
Weighted average shares outstanding	73,467			73,040
Diluted effect of stock awards	—			—
Weighted average shares outstanding assuming dilution	73,467			73,040

Loss per share attributable to U.S. Silica Holdings, Inc.:
Basic loss per share	$	(0.98	)	$	(0.26	)
Diluted loss per share	$	(0.98	)	$	(0.26	)

Potentially dilutive shares (in thousands) of 41 and 171 for the three months ended March 31, 2020 and 2019, respectively, were excluded from the calculation of diluted weighted average shares outstanding and diluted earnings per share because we were in a net loss position. Certain stock options, restricted stock awards and performance share units were excluded from the computation of diluted earnings per share because their effect would have been anti-dilutive. Stock awards (in thousands) excluded from the calculation of diluted loss per common share were as follows:

In thousands

Three Months Ended
March 31,

Stock options excluded

Restricted stock and performance share units awards excluded