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 (“PSUs”), time-vested restricted stock units (“RSUs”) and shares associated with the conversion of debt instruments.


	For the Three Months Ended June 30,				For the Six Months Ended June 30,
	2026		2025		2026		2025
	(In thousands, except per share data)
Net income attributable to Amkor common stockholders	$	173,753	$	54,417	$	257,104	$	75,545




Weighted-average number of common shares outstanding - basic	247,912		247,090		247,732		246,973
Effect of dilutive securities:
Share-based awards	2,066		716		2,098		869

Weighted-average number of common shares outstanding - diluted	249,978		247,806		249,830		247,842
Net income attributable to Amkor per common share:
Basic	$	0.70	$	0.22	$	1.04	$	0.31
Diluted	0.70		0.22		1.03		0.30

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 June 30,		For the Six Months Ended June 30,
	2026	2025	2026	2025
	(In thousands)
Share-based awards	—	984	8	378

There were no potentially dilutive common shares issuable pursuant to the $1.15 billion aggregate principal amount of our 0.00% convertible senior notes due 2031 (the “2031 Notes”) for the three and six months ended June 30, 2026, as the average market price of our common stock did not exceed the applicable conversion price during those periods. Refer to Note 11 for additional information on the 2031 Notes.