Notice Regarding the Status of Treasury Stock Acquisition (Acquisition of Treasury Stock Based on Provisions of Article 459, Paragraph 1 of the Companies Act)

Overview of Capital Policy

Sumitomo Seika Chemicals Company, Limited has conducted treasury stock acquisitions based on the resolution of the Board of Directors dated November 12, 2025, in accordance with Article 459, Paragraph 1 of the Companies Act and Article 26 of its Articles of Incorporation. The number of shares acquired in February 2026 was 35,100 shares at a purchase price of 221,451,000 yen, with the acquisition period from February 1 to February 28, 2026. The cumulative number of shares acquired amounts to 142,800 shares at a total purchase price of 795,070,000 yen. The acquisition method was market purchases on the Tokyo Stock Exchange (through a discretionary trading agreement with a securities company), with an acquisition limit of 210,000 shares and a total purchase price limit of 1 billion yen.

Impact on Shareholders and Future Outlook

The treasury stock acquired represents approximately 1.6% of the total number of outstanding shares. Acquisitions will continue within the set limits through March 31, 2026. The purpose of the treasury stock acquisition is to enhance shareholder value and improve capital efficiency, which may contribute to curbing dilution. Future acquisition status will be disclosed as appropriate.