Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2021

Computation of basic and diluted earnings per share

The following table summarizes the computation of basic and diluted EPS:


	For the Three Months Ended March 31,
	2021		2020
	(In thousands, except per share data)
Net income attributable to Amkor common stockholders	$	119,809	$	63,889




Weighted-average number of common shares outstanding - basic	243,267		240,919
Effect of dilutive securities:
Share-based awards	1,862		414
Weighted-average number of common shares outstanding - diluted	245,129		241,333
Net income attributable to Amkor per common share:
Basic	$	0.49	$	0.27
Diluted	0.49		0.26

Summary of potential shares of common stock excluded from diluted earnings per share

The following table summarizes the potential shares of common stock that were excluded from diluted EPS because the effect of including these potential shares was anti-dilutive:


	For the Three Months Ended March 31,
	2021	2020
	(In thousands)
Share-based awards	—	4,321