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Share Capital and Capital Surplus (Tables)
12 Months Ended
Dec. 31, 2025
TextBlock 1 [Abstract]  
Summary of Share Capital
(a)
Share capital as of December 31, 2024 and 2025 are as follows:
 
(Share, in Won)
  
2024
    
2025
 
Authorized shares
     200,000,000        200,000,000  
Par value
  
5,000        5,000  
Issued shares(*1,2)
     82,624,377        80,932,952  
Shared capital(*3)
  
 482,403,125,000        482,403,125,000  
 
(*1)
As of December 31, 2025, total number of American Depository Receipts (ADRs) outstanding in overseas stock market amounts to 9,159,020 and such ADRs are equivalent to 2,289,755 shares of common stock.
(*2)
Pursuant to the resolution of the Board of Directors’ meeting on February 19, 2025, the controlling company decided to retire
 1,691,425
shares using distributable profits, and it was completed on March 31, 2025. As a result, as of December 31, 2025, the the controlling company’s total number of issued shares has decreased. 
(*3)
As of December 31, 2025, the difference between the ending balance of common stock and the aggregate par value of issued common stock is
77,738 million due to retirement of 15,547,673 treasury stocks.
Changes in Issued Common Stock
(b)
Changes 
in issued common stock for the years ended December 31, 2024 and 2025 are as follows:
 
(share)
 
2024
   
2025
 
   
Issued
shares
   
Treasury
shares
   
Number of
outstanding
shares
   
Issued
shares
   
Treasury
shares
   
Number of
outstanding
shares
 
Beginning
    84,571,230       (8,695,023     75,876,207       82,624,377       (7,003,598     75,620,779  
Acquisition of treasury shares
    —        (255,428     (255,428     —        —        —   
Retirement of treasury shares
    (1,946,853     1,946,853       —        (1,691,425     1,691,425       —   
 
 
 
   
 
 
   
 
 
   
 
 
   
 
 
   
 
 
 
Ending
    82,624,377       (7,003,598     75,620,779       80,932,952       (5,312,173     75,620,779  
 
 
 
   
 
 
   
 
 
   
 
 
   
 
 
   
 
 
 
Summary of Capital Surplus
(c)
Capital surplus as of December 31, 2024 and 2025 are as follows:
 
(in millions of Won)
  
2024
    
2025
 
Share premium
  
463,825        463,825  
Gain on disposal of treasury shares
     808,994        808,994  
Other capital surplus
     385,531        421,753  
  
 
 
    
 
 
 
  
1,658,350        1,694,572