Ternium Investments S.À R.L. entered into a share purchase agreement to acquire an additional 21.8% stake in Usinas Siderúrgicas de Minas Gerais S.A. (BOVESPA:USIM5) from Nippon Steel Corporation (TSE:5401) and Mitsubishi Corporation (TSE:8058) for approximately $320 million on November 5, 2025. Pursuant to the transaction, Ternium would pay $2.06 per ordinary share, which would result in an aggregate purchase price of approximately $315.2 million in cash for 153.1 million ordinary shares, increasing its participation in the Usiminas control group from 51.5% to 83.1%. The transaction will be financed with cash on hand. Upon the closing of the Transaction, the T/T Group will hold a relative interest of approximately 92.95% of the shares subject to the Shareholders' Agreement, while PU will maintain its 7.05% of such Subject Shares. In relation to the total common shares issued by Usiminas, the T/T Group will hold 71.02% (including the ordinary shares issued by Usiminas owned by Ternium that are not subject to the Shareholders? Agreement, and without disregarding the shares held in treasury). As a result of the Transaction, the NSC Group will cease to be part of the Usinas Siderúrgicas' controlling group and Shareholders' Agreement. The rights and obligations of the PU under the Shareholders' Agreement, including voting and nomination rights, will not change.

The transaction is subject to approval by Brazil's antitrust authorities.

Pinheiro Neto Advogados acted as legal advisor to Nippon Steel Corporation and Mitsubishi Corporation.

Ternium Investments S.À R.L. completed the acquisition of an additional 21.8% stake in Usinas Siderúrgicas de Minas Gerais S.A. (BOVESPA:USIM5) from Nippon Steel Corporation (TSE:5401) and Mitsubishi Corporation (TSE:8058) on February 10, 2026.