Japan IR -

4008 Sumitomo Seika Chemicals Company, Limited

2026/03/25

Notice Regarding Status of Share Buyback and Completion of Acquisition (Share Buyback Based on Provisions of Article 459, Paragraph 1 of the Companies Act and Articles of Incorporation)

Acquired 30,700 shares of treasury stock totaling JPY 204,327,000 between March 1 and March 24, 2026; the buyback initiated on November 12, 2025, concluded with a cumulative total of 173,500 shares acquired at JPY 999,397,000.

#SumitomoSeikaChemicals #ShareBuyback #JapaneseStocks

4008 Sumitomo Seika Chemicals Company, Limited

2026/03/03

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

In February 2026, 35,100 shares of treasury stock were acquired at a purchase price of 221,451,000 yen, bringing the cumulative total to 142,800 shares acquired at a total purchase price of 795,070,000 yen.

#SumitomoSeikaChemicals #TreasuryStockAcquisition #CapitalPolicy

4008 Sumitomo Seika Chemicals Company, Limited

2026/01/30

Notice of Resignation of Director Who is an Audit and Supervisory Committee Member

Independent Outside Director (Audit and Supervisory Committee Member) Mr. Fujio Yoshiike resigned effective January 30, 2026, due to health reasons.

#SumitomoSeikaChemicals #ExecutivePersonnel #IR

#SumitomoSeikaChemicals

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