Earnings Per Share

3 Months Ended

Mar. 31, 2019

Earnings Per Share [Abstract]

Earnings Per Share

The following table shows a reconciliation of the numerators and denominators used in calculating basic and diluted earnings per share.

	Three Months Ended March 31,
(In millions, except per share amounts)	2019		2018
Numerators
Net income (loss) attributable to W. R. Grace & Co. shareholders	$	24.7	$	43.6
Denominators
Weighted average common shares—basic calculation	66.8		67.6
Dilutive effect of employee stock options	0.1		0.1
Weighted average common shares—diluted calculation	66.9		67.7
Basic earnings per share	$	0.37	$	0.64
Diluted earnings per share	$	0.37	$	0.64

There were 0.9 million anti-dilutive options outstanding for the three months ended March 31, 2019, compared with 1.7 million for the prior-year quarter.

On February 8, 2017, the Company announced that its Board of Directors authorized a share repurchase program of up to $250 million. The timing of the repurchases and the actual amount repurchased will depend on a variety of factors, including the market price of the Company’s shares, strategic priorities for the deployment of capital, and general market and economic conditions. During the three months ended March 31, 2019 and 2018, the Company repurchased 69,860 shares and 514,141 shares of Company common stock for $4.8 million and $35.0 million, respectively, pursuant to the terms of the share repurchase program. As of March 31, 2019, $134.1 million remained under the current authorization.