David C. Dennsteadt's Stock Appreciation Rights and Common Stock Holdings

The filing details the ownership of David C. Dennsteadt, Executive Vice President of RPM International Inc., as of October 2, 2025. Dennsteadt holds 29,422 shares of Common Stock directly and through the company's deferred compensation plan, as well as 575 shares indirectly via the RPM International Inc. 401(k) Plan. Additionally, he holds several Stock Appreciation Rights (SARs) with varying expiration dates and exercise prices, totaling 167,300 SARs. These SARs are either fully vested or vest in installments starting from July 2023 through July 2026. The filing also includes a Power of Attorney granted to several individuals to act on Dennsteadt's behalf for SEC filings and related matters.