Notice of Resolution on Matters Concerning Share Buyback (Acquisition of Treasury Stock pursuant to Article 165, Paragraph 2 of the Companies Act)

Overview of Capital Policy

Shin-Etsu Chemical Company, Limited resolved on share buyback based on Article 165, Paragraph 3 of the Companies Act at the Board of Directors meeting held on April 28, 2026, as part of its capital policy centered on shareholder returns. The target for acquisition is the company's common shares, with the maximum number of shares to be acquired set at 45 million shares (2.42% of the total issued shares), and the total acquisition amount capped at JPY 250 billion. The acquisition period is approximately one year from May 21, 2026 to April 27, 2027.

Shareholder Returns and Financial Policy

The company’s basic policy is to prioritize financial discipline while striving to expand business earnings and to appropriately and stably return the fruits to shareholders. Taking into account return on equity and cost of capital, the company flexibly conducts share buybacks depending on stock price levels and other circumstances, with the current resolution being part of such efforts. As of March 31, 2026, the number of treasury shares held was approximately 128.28 million shares, and this acquisition aims to further enhance capital efficiency.