Notice on the Decision Regarding Matters Related to Share Buyback and Cancellation of Treasury Stock (Based on the Provisions of Article 459, Paragraph 1 of the Companies Act Regarding the Acquisition of Treasury Stock and Article 178 of the Companies Act Regarding the Cancellation of Treasury Stock)

Overview of Capital Policy

Nippon Steel Mining Co., Ltd. resolved on February 27, 2026, at the Board of Directors meeting matters related to the acquisition and cancellation of treasury stock. The target for acquisition is the Company's common stock, with a maximum acquisition of 5,000,000 shares (6.3% of total issued shares), and the total acquisition price ceiling is 10 billion yen. The acquisition period is from April 1, 2026, to January 29, 2027, with the acquisition method being market purchase on the Tokyo Stock Exchange. All acquired treasury stock is planned to be cancelled on March 31, 2027.

Shareholder Return and Future Outlook

This share buyback and cancellation is part of a flexible and agile capital policy responding to changes in the business environment, aiming to improve capital efficiency and enhance shareholder returns. As of December 31, 2025, the number of treasury shares held is 1,234,412 shares. Going forward, the Company intends to improve capital efficiency while ensuring financial soundness, considering reviews of mining development projects and asset disposal plans.