Earnings Per Share

3 Months Ended

Mar. 31, 2022

Basic earnings per share (“EPS”) is computed by dividing net income attributable to Amkor common stockholders by the weighted-average number of common shares outstanding during the period. The weighted-average number of common shares outstanding is reduced for treasury stock.

Diluted EPS is computed based on the weighted-average number of common shares outstanding plus the effect of dilutive potential common shares outstanding during the period. Dilutive potential common shares include outstanding stock options, performance-vested restricted stock units, time-vested restricted stock units and unvested restricted shares.

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


	For the Three Months Ended March 31,
	2022		2021
	(In thousands, except per share data)
Net income attributable to Amkor common stockholders	$	170,663	$	119,809




Weighted-average number of common shares outstanding - basic	244,403		243,267
Effect of dilutive securities:
Share-based awards	1,597		1,862
Weighted-average number of common shares outstanding - diluted	246,000		245,129
Net income attributable to Amkor per common share:
Basic	$	0.70	$	0.49
Diluted	0.69		0.49

There were no anti-dilutive shares for the three months ended March 31, 2022 and 2021.