v3.25.2
CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY (Unaudited) - USD ($)
shares in Thousands, $ in Thousands
Total
Total Amkor Stockholders’ Equity
Common Stock
Additional Paid- In Capital
Retained Earnings
Accumulated Other Comprehensive Income (Loss)
Treasury Stock
Noncontrolling Interest in Subsidiaries
Balance at beginning of period, common stock (in shares) at Dec. 31, 2023     292,167          
Balance at beginning of period at Dec. 31, 2023 $ 3,995,035 $ 3,962,308 $ 292 $ 2,008,170 $ 2,159,831 $ 16,350 $ (222,335) $ 32,727
Balance at beginning of period, treasury stock (in shares) at Jun. 30, 2024             (46,340)  
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Net income 127,044 125,794     125,794     1,250
Other comprehensive income (loss) (12,136) (12,136)       (12,136)    
Treasury stock acquired through surrender of shares for tax withholding (in shares)             (61)  
Treasury stock acquired through surrender of shares for tax withholding (1,822) (1,822)         $ (1,822)  
Issuance of stock through share-based compensation plans (in shares)     475          
Issuance of stock through share-based compensation plans 2,815 2,815 $ 1 2,814        
Share-based compensation 11,528 11,528   11,528        
Cash dividends declared (38,830) (38,830)     (38,830)      
Subsidiary dividends to non-controlling interests (300)             (300)
Balance at end of period, common stock (in shares) at Jun. 30, 2024     292,642          
Balance at end of period at Jun. 30, 2024 4,083,334 4,049,657 $ 293 2,022,512 2,246,795 4,214 $ (224,157) 33,677
Balance at end of period, treasury stock (in shares) at Dec. 31, 2023             (46,279)  
Balance at beginning of period, common stock (in shares) at Mar. 31, 2024     292,494          
Balance at beginning of period at Mar. 31, 2024 4,030,608 3,997,127 $ 292 2,014,782 2,199,300 6,910 $ (224,157) 33,481
Balance at beginning of period, treasury stock (in shares) at Jun. 30, 2024             (46,340)  
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Net income 67,258 66,897     66,897     361
Other comprehensive income (loss) (2,696) (2,696)       (2,696)    
Issuance of stock through share-based compensation plans (in shares)     148          
Issuance of stock through share-based compensation plans 1,460 1,460 $ 1 1,459        
Share-based compensation 6,271 6,271   6,271        
Cash dividends declared (19,402) (19,402)     (19,402)      
Subsidiary dividends to non-controlling interests (165)             (165)
Balance at end of period, common stock (in shares) at Jun. 30, 2024     292,642          
Balance at end of period at Jun. 30, 2024 $ 4,083,334 4,049,657 $ 293 2,022,512 2,246,795 4,214 $ (224,157) 33,677
Balance at end of period, treasury stock (in shares) at Mar. 31, 2024             (46,340)  
Balance at beginning of period, common stock (in shares) at Dec. 31, 2024 246,684   293,052          
Balance at beginning of period at Dec. 31, 2024 $ 4,183,165 4,149,545 $ 293 2,031,643 2,335,132 7,510 $ (225,033) 33,620
Balance at beginning of period, treasury stock (in shares) at Jun. 30, 2025 (46,435)           (46,435)  
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Net income $ 76,905 75,545     75,545     1,360
Other comprehensive income (loss) 4,789 4,789       4,789    
Treasury stock acquired through surrender of shares for tax withholding (in shares)             (67)  
Treasury stock acquired through surrender of shares for tax withholding (1,481) (1,481)         $ (1,481)  
Issuance of stock through share-based compensation plans (in shares)     525          
Issuance of stock through share-based compensation plans 902 902 $ 1 901        
Share-based compensation 9,004 9,004   9,004        
Cash dividends declared (40,880) (40,880)     (40,880)      
Subsidiary dividends to non-controlling interests $ (330)             (330)
Balance at end of period, common stock (in shares) at Jun. 30, 2025 247,142   293,577          
Balance at end of period at Jun. 30, 2025 $ 4,232,074 4,197,424 $ 294 2,041,548 2,369,797 12,299 $ (226,514) 34,650
Balance at end of period, treasury stock (in shares) at Dec. 31, 2024 (46,368)           (46,368)  
Balance at beginning of period, common stock (in shares) at Mar. 31, 2025     293,482          
Balance at beginning of period at Mar. 31, 2025 $ 4,190,590 4,156,410 $ 293 2,036,608 2,335,830 10,031 $ (226,352) 34,180
Balance at beginning of period, treasury stock (in shares) at Jun. 30, 2025 (46,435)           (46,435)  
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Net income $ 55,052 54,417     54,417     635
Other comprehensive income (loss) 2,268 2,268       2,268    
Treasury stock acquired through surrender of shares for tax withholding (in shares)             (8)  
Treasury stock acquired through surrender of shares for tax withholding (162) (162)         $ (162)  
Issuance of stock through share-based compensation plans (in shares)     95          
Issuance of stock through share-based compensation plans 132 132 $ 1 131        
Share-based compensation 4,809 4,809   4,809        
Cash dividends declared (20,450) (20,450)     (20,450)      
Subsidiary dividends to non-controlling interests $ (165)             (165)
Balance at end of period, common stock (in shares) at Jun. 30, 2025 247,142   293,577          
Balance at end of period at Jun. 30, 2025 $ 4,232,074 $ 4,197,424 $ 294 $ 2,041,548 $ 2,369,797 $ 12,299 $ (226,514) $ 34,650
Balance at end of period, treasury stock (in shares) at Mar. 31, 2025             (46,427)