Initial Statement of Beneficial Ownership

This filing reports Benjamin Steinbruch's initial statement of beneficial ownership for NATIONAL STEEL CO (SID). Steinbruch directly owns 500,022 common shares. Additionally, he indirectly owns 45,706,242 shares through Rio Iaco Participacoes S.A. and 552,412,693 shares through Vicunha Acos S.A., the controlling shareholder. Steinbruch holds the positions of CEO and Board Member. The filing is dated April 7, 2026, with the period of report being April 30, 2025.