Earnings Per Share

12 Months Ended

Dec. 31, 2023

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, PSUs, RSUs and unvested restricted shares.

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


	For the Year Ended December 31,
	2023		2022		2021
	(In thousands, except per share data)





Net income attributable to Amkor common stockholders	$	359,813	$	765,823	$	642,995

Weighted-average number of common shares outstanding — basic	245,628		244,676		243,878
Effect of dilutive securities:
Share-based awards	1,548		1,529		1,826
Weighted-average number of common shares outstanding — diluted	247,176		246,205		245,704
Net income attributable to Amkor per common share:
Basic	$	1.46	$	3.13	$	2.64
Diluted	$	1.46	$	3.11	$	2.62

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 Year Ended December 31,
	2023	2022	2021
	(In thousands)
Share-based awards	2	180	112