Companhia Siderúrgica Nacional Annual Report on Form 20-F Filing

Companhia Siderúrgica Nacional (CSN) announced on April 30, 2026, that it has filed its Annual Report on Form 20-F for the fiscal year ended December 31, 2025, with the U.S. Securities and Exchange Commission. The report is available to shareholders and holders of American depositary shares, who can request a hard copy of the complete audited financial statements free of charge. The Annual Report can also be accessed on CSN's Investor Relations website at www.ri.csn.com.br. The filing was authorized by Benjamin Steinbruch, CEO, and Antonio Marco Campos Rabello, CFO and Investor Relations Officer. The report may contain forward-looking statements based on current management views and estimates, subject to risks and uncertainties that could cause actual results to differ from expectations.