Notice Regarding the Status of Treasury Stock Acquisition (Based on the Provisions of Article 165, Paragraph 2 of the Companies Act)

Overview of Treasury Stock Acquisition

TOSOH CORPORATION has implemented treasury stock acquisition pursuant to the resolution of the Board of Directors dated August 5, 2025, in accordance with the provisions of Article 165, Paragraph 3 of the Companies Act. The acquisition targets common shares, with an upper limit of 17,000,000 shares and a maximum acquisition price of 25 billion yen. The acquisition period is from August 6, 2025, to March 31, 2026. The actual acquisition in December 2025 was 909,400 shares for 2,115,977,500 yen, bringing the cumulative total number of shares acquired to 8,246,400 shares and the cumulative acquisition cost to 18,755,423,400 yen. The method of acquisition is market purchase under a discretionary trading contract.

Impact on Shareholders and Future Outlook

This treasury stock acquisition aims to obtain up to 5.34% of the total outstanding shares excluding treasury stock and is intended to improve capital efficiency as part of shareholder returns. The acquisition period will continue until March 31, 2026, and additional acquisitions are expected. There is no specific mention of cancellation of acquired shares or future capital policy plans, so continued attention to future developments is warranted.