Notice Regarding the Status of Share Buyback and Completion of Acquisition (Based on the Provisions of Article 165, Paragraph 2 of the Companies Act Relating to the Acquisition of Treasury Stock)

Overview of Share Buyback

Tosoh Corporation conducted a share buyback of common shares based on the board resolution dated August 5, 2025. The upper limit on the number of shares to be acquired was set at 17,000,000 shares, with the upper limit on acquisition price at 25 billion yen, and the acquisition period was from August 6, 2025, to March 31, 2026. During the period from March 1 to March 24, 2026, the company acquired 746,700 shares at a total price of 1,821,496,800 yen. With this, the acquisition under the aforementioned board resolution has been completed.

Impact on Shareholders and Future Outlook

The company has completed cumulative share buybacks of 10,717,500 shares at an acquisition price of 24,999,797,950 yen, representing approximately 5.34% of the total issued shares. The method of acquisition was market purchase under a discretionary trading contract, implemented as part of efforts to improve capital efficiency and enhance shareholder returns. Information regarding future cancellation of treasury stock or capital policy is currently unavailable; however, the completion of this acquisition may lead to a review of the capital structure.