EARNINGS PER SHARE

9 Months Ended

Sep. 30, 2020

7. EARNINGS PER SHARE

Basic earnings per share is computed by dividing net income attributable to common stockholders by the weighted-average number of common shares outstanding during the periods. Diluted earnings per share is computed by dividing net income attributable to common stockholders by the weighted-average common shares and common share equivalents outstanding during the periods. The dilutive effect of common share equivalents is considered in the diluted earnings per share computation using the treasury stock method, which includes consideration of equity awards.

The following table sets forth the details of basic and diluted earnings per share:


	Three Months Ended				Nine Months Ended
	September 30				September 30
(In thousands, except per share data)	2020		2019		2020		2019
Net income attributable to WESCO International	$	80,678	$	64,495	$	80,578	$	170,329
Less: Preferred stock dividends	14,511		—		15,787		—
Net income attributable to common stockholders	$	66,167	$	64,495	$	64,791	$	170,329
Weighted-average common shares outstanding used in computing basic earnings per share	50,043		42,100		44,873		43,545
Common shares issuable upon exercise of dilutive equity awards	444		278		231		355
Weighted-average common shares outstanding and common share equivalents used in computing diluted earnings per share	50,487		42,378		45,104		43,900
Earnings per share attributable to common stockholders
Basic	$	1.32	$	1.53	$	1.44	$	3.91
Diluted	$	1.31	$	1.52	$	1.44	$	3.88

For the three and nine months ended September 30, 2020, the computation of diluted earnings per share attributable to common stockholders excluded stock-based awards of approximately 2.0 million and 3.0 million, respectively. For the three and nine months ended September 30, 2019, the computation of diluted earnings per share attributable to common stockholders excluded stock-based awards of approximately 1.8 million. These amounts were excluded because their effect would have been antidilutive.

In December 2017, the Company's Board of Directors authorized the repurchase of up to $300 million of the Company's common stock through December 31, 2020. In October 2018, the Board approved an increase to this repurchase authorization from $300 million to $400 million. For the three months ended September 30, 2019, the Company received 695,496 shares from an accelerated stock repurchase transaction entered into on May 7, 2019. For the nine months ended September 30, 2019, the Company received a total of 3,455,584 shares, of which 365,272 were received upon the settlement of an accelerated stock repurchase agreement entered into on November 6, 2018.

The total number of shares ultimately delivered under an accelerated stock repurchase transaction is determined by the average of the volume-weighted-average price of the Company's common stock for each exchange business day during the respective settlement valuation periods. For purposes of computing earnings per share for the three and nine months ended September 30, 2019, share repurchases have been reflected as a reduction to common shares outstanding on the respective delivery dates.