v3.26.1
RELATED-PARTY BALANCES AND TRANSACTIONS (Tables)
12 Months Ended
Dec. 31, 2025
Notes and other explanatory information [abstract]  
Schedule of transactions with subsidiaries, jointly controlled entities, associates, exclusive funds and other related parties
                               
    Consolidated
    12/31/2025   12/31/2024
    Associates   Joint-ventures and Joint Operation   Other related parties   Total   Associates   Joint-ventures and Joint Operation   Other related parties   Total
Assets                                
 Current Assets                                 
Cash and cash equivalents(1)         1,979,060    1,979,060        912,533   912,533
Financial investments                    860,591   860,591
Trade receivables 6  73,045   24,254        97,299   88,750    3,230    191    92,171
Dividends receivable 9  19,477   2,187   54,362    76,026     127,386   74,050   201,436
Borrowings 9   4,147        4,147      5,315        5,315
Other receivables 9   2   1,829    1,831     2   1,829    1,831
     92,522   30,590   2,035,251    2,158,363   88,750   135,933   1,849,194    2,073,877
 Non-current Assets                                 
Financial investments                    142,423   142,423
Borrowings 9  6,024   2,131,858        2,137,882    3,789    1,899,239        1,903,028
Actuarial liabilities 9       53,328    53,328       47,708    47,708
Other receivables 9                1,792,579        1,792,579
     6,024   2,131,858   53,328    2,191,210    3,789    3,691,818    190,131    3,885,738
     98,546   2,162,448   2,088,579    4,349,573   92,539    3,827,751   2,039,325    5,959,615
Liabilities                                
Current Liabilities                                 
Trade payables    19,493    171,345    864    191,702   13,676   217,289    184,892   415,857
Accounts payable 19   24,400   92,892    117,292   23,245   22,571    140,991   186,807
Provision for consumption 19   25,841        25,841          
     19,493    221,586   93,756    334,835   36,921   239,860    325,883   602,664
 Non-current Liabilities                                 
Accounts payable 19               20,850        20,850
                      20,850        20,850
     19,493    221,586   93,756    334,835   36,921   260,710    325,883   623,514
                                 
                                 
    Consolidated
    12/31/2025   12/31/2024
    Associates   Joint-ventures and Joint Operation   Other related parties   Total   Associates   Joint-ventures and Joint Operation   Other related parties   Total
P & L                                
Sales   2,144,285   49,231    79    2,193,595    2,357,816   21,362    903    2,380,081
Cost and expenses      (2,117,736)   (334,768)   (2,452,504)    (179,022)   (2,190,343)   (227,090)   (2,596,455)
Financial income (expenses)                      
Interest 30  2,235    220,698   83,874    306,807    2,508   155,291   38,588   196,387
Exchange rate variations andmonetary, net         24,040    24,040        141,190   141,190
Financial investments (2)         (191,986)   (191,986)       (632,612)    (632,612)
Dividends receivable                   42,347    42,347
Other income and expenses   (219,635)   1,796   5,687   (212,152)          
    1,926,885    (1,846,011)   (413,074)   (332,200)    2,181,302   (2,013,690)   (636,674)    (469,062)
(1)For better presentation, certain amounts have been reclassified. The balance of ‘Cash and cash equivalents’, previously presented together with ‘Financial investments’, is presented separately in 2025.
(2)Following the disposal of the shares of Usiminas, which reduced the Company’s interest to 4.99% in both common and preferred shares, Usiminas is no longer considered a related party of the Group. Accordingly, the balance presented relates exclusively to the period in which Usiminas was classified as a related party.
Schedule of key management personnel
           
    12/31/2025   12/31/2024   12/31/2023
    P&L
Short-term benefits for employees and officers   77,885   71,248   62,478
Post-employment benefits    840    814    450
  78,725   72,062   62,928
Schedule of guarantees
                                     
  Currency   Maturities   Borrowings Tax foreclosure Others Total
          12/31/2025   12/31/2024   12/31/2025   12/31/2024   12/31/2025   12/31/2024   12/31/2025   12/31/2024
Transnordestina Logísitca R$   Up to 09/19/2056 and Indefinite   3,251,444    3,966,722    10,869    10,717   4,972   4,828    3,267,285    3,982,267
Subsidiaries R$   Up to 01/10/2028 and Indefinite   368,590    2,079,693         600   1,920   369,190    2,081,613
Total in R$         3,620,034    6,046,415    10,869    10,717   5,572   6,748    3,636,475    6,063,880
                                       
CSN Inova Ventures US$   01/28/2028   1,300,000    1,300,000                  1,300,000    1,300,000
CSN Resources US$   Up to 04/08/2032   2,233,000    2,230,000                  2,233,000    2,230,000
Total in US$         3,533,000    3,530,000                3,533,000    3,530,000
Lusosider Aços Planos €   Indefinite                 75,000   75,000    75,000    75,000
Total em €                   75,000   75,000    75,000    75,000
Total in R$         19,279,934    21,858,819       481,725   482,723    19,761,659    22,341,542
          22,899,968    27,905,234    10,869    10,717   487,297   489,471    23,398,134    28,405,422