v3.26.3
STATEMENTS OF CONSOLIDATED STOCKHOLDERS' EQUITY (UNAUDITED) - USD ($)
$ in Millions
Total
Common Stock
Additional Paid in Capital
Retained Earnings
Treasury Stock
Accumulated Other Comprehensive Income (Loss)
Beginning balance at Dec. 31, 2024 $ 743.1 $ 0.2 $ 1,117.0 $ 81.3 $ (475.9) $ 20.5
Beginning balance (shares) at Dec. 31, 2024   16,095,898        
Net income 21.6     21.6    
Other comprehensive income (loss), net of tax 2.6         2.6
Common shares issued (including impacts from Long-Term Incentive programs) (shares)   84,115        
Cancellation of shares to cover tax withholdings upon common shares issued (1.8)   (1.8)      
Cancellation of shares to cover tax withholdings upon common shares issued (shares)   (25,637)        
Cash dividends declared [1] (12.9)     (12.9)    
Amortization of unearned equity compensation 4.2   4.2      
Ending balance at Mar. 31, 2025 756.8 $ 0.2 1,119.4 90.0 (475.9) 23.1
Ending balance (shares) at Mar. 31, 2025   16,154,376        
Beginning balance at Dec. 31, 2024 743.1 $ 0.2 1,117.0 81.3 (475.9) 20.5
Beginning balance (shares) at Dec. 31, 2024   16,095,898        
Net income [2] 84.3          
Other comprehensive income (loss), net of tax 6.2          
Ending balance at Sep. 30, 2025 806.1 $ 0.2 1,128.0 127.1 (475.9) 26.7
Ending balance (shares) at Sep. 30, 2025   16,206,255        
Beginning balance at Mar. 31, 2025 756.8 $ 0.2 1,119.4 90.0 (475.9) 23.1
Beginning balance (shares) at Mar. 31, 2025   16,154,376        
Net income 23.2     23.2    
Other comprehensive income (loss), net of tax 4.1         4.1
Common shares issued (including impacts from Long-Term Incentive programs) 0.4   0.4      
Common shares issued (including impacts from Long-Term Incentive programs) (shares)   23,582        
Cancellation of shares to cover tax withholdings upon common shares issued (shares)   (219)        
Cash dividends declared [1] (12.8)     (12.8)    
Amortization of unearned equity compensation 4.3   4.3      
Ending balance at Jun. 30, 2025 776.0 $ 0.2 1,124.1 100.4 (475.9) 27.2
Ending balance (shares) at Jun. 30, 2025   16,177,739        
Net income 39.5     39.5    
Other comprehensive income (loss), net of tax (0.5)         (0.5)
Common shares issued (including impacts from Long-Term Incentive programs) 0.1   0.1      
Common shares issued (including impacts from Long-Term Incentive programs) (shares)   42,894        
Cancellation of shares to cover tax withholdings upon common shares issued (1.1)   (1.1)      
Cancellation of shares to cover tax withholdings upon common shares issued (shares)   (14,378)        
Cash dividends declared [1] (12.8)     (12.8)    
Amortization of unearned equity compensation 4.9   4.9      
Ending balance at Sep. 30, 2025 806.1 $ 0.2 1,128.0 127.1 (475.9) 26.7
Ending balance (shares) at Sep. 30, 2025   16,206,255        
Beginning balance at Dec. 31, 2025 $ 826.1 $ 0.2 1,132.5 142.5 (475.9) 26.8
Beginning balance (shares) at Dec. 31, 2025 16,210,443 16,210,443 [3]        
Net income $ 62.5     62.5    
Other comprehensive income (loss), net of tax 5.2         5.2
Common shares issued (including impacts from Long-Term Incentive programs) (shares) [3]   199,737        
Cancellation of shares to cover tax withholdings upon common shares issued (8.8)   (8.8)      
Cancellation of shares to cover tax withholdings upon common shares issued (shares) [3]   (70,056)        
Cash dividends declared [4] (13.6)     (13.6)    
Amortization of unearned equity compensation 5.9   5.9      
Ending balance at Mar. 31, 2026 877.3 $ 0.2 1,129.6 191.4 (475.9) 32.0
Ending balance (shares) at Mar. 31, 2026 [3]   16,340,124        
Beginning balance at Dec. 31, 2025 $ 826.1 $ 0.2 1,132.5 142.5 (475.9) 26.8
Beginning balance (shares) at Dec. 31, 2025 16,210,443 16,210,443 [3]        
Net income [2] $ 190.3          
Other comprehensive income (loss), net of tax (7.3)          
Ending balance at Sep. 30, 2026 $ 975.5 $ 0.2 1,138.1 293.6 (475.9) 19.5
Ending balance (shares) at Sep. 30, 2026 16,349,886 16,349,886 [3]        
Beginning balance at Mar. 31, 2026 $ 877.3 $ 0.2 1,129.6 191.4 (475.9) 32.0
Beginning balance (shares) at Mar. 31, 2026 [3]   16,340,124        
Net income 96.8     96.8    
Other comprehensive income (loss), net of tax (22.3)         (22.3)
Common shares issued (including impacts from Long-Term Incentive programs) 0.4   0.4      
Common shares issued (including impacts from Long-Term Incentive programs) (shares) [3]   9,230        
Cancellation of shares to cover tax withholdings upon common shares issued (0.1)   (0.1)      
Cancellation of shares to cover tax withholdings upon common shares issued (shares) [3]   (262)        
Cash dividends declared [4] (12.8)     (12.8)    
Amortization of unearned equity compensation 4.5   4.5      
Ending balance at Jun. 30, 2026 943.8 $ 0.2 1,134.4 275.4 (475.9) 9.7
Ending balance (shares) at Jun. 30, 2026 [3]   16,349,092        
Net income 31.0     31.0    
Other comprehensive income (loss), net of tax 9.8         9.8
Common shares issued (including impacts from Long-Term Incentive programs) (shares) [3]   1,250        
Cancellation of shares to cover tax withholdings upon common shares issued (shares) [3]   (456)        
Cash dividends declared [4] (12.8)     (12.8)    
Amortization of unearned equity compensation 3.7   3.7      
Ending balance at Sep. 30, 2026 $ 975.5 $ 0.2 $ 1,138.1 $ 293.6 $ (475.9) $ 19.5
Ending balance (shares) at Sep. 30, 2026 16,349,886 16,349,886 [3]        
[1] Dividends declared per common share were $0.77 for the quarters ended March 31, 2025, June 30, 2025, and September 30, 2025.
[2] See Note 11 for supplemental cash flow information.
[3] At September 30, 2026, 793,179 shares were available for awards under the Kaiser Aluminum Corporation 2021 Equity and Incentive Compensation Plan, as amended and restated.
[4] Dividends declared per common share were $0.77 for the quarters ended March 31, 2026, June 30, 2026, and September 30, 2026.