X0609 4 2026-04-17 0000110621 RPM INTERNATIONAL INC/DE/ RPM 0001622407 Kastner Janeen B. false 2628 PEARL ROAD MEDINA OH 44256 false true false false VP Corp. Benefits/Risk Mgmt. false Common Stock, $0.01 par value 2026-04-17 4 M false 30000 50.99 A 154057 D Common Stock, $0.01 par value 2026-04-17 4 D false 13931 109.81 D 140126 D Common Stock, $0.01 par value 2026-04-17 4 F false 5452 109.81 D 134704 D Common Stock, $0.01 par value 1117 I By 401(k) Plan Stock Appreciation Rights 50.99 2026-04-17 4 M false 30000 0 D Common Stock 30000 190000 D Approximate number of shares of Common Stock held as of April 17, 2026 in the account of the Reporting Person by Fidelity Trust Management Company, as Trustee of the RPM International Inc. 401(k) Trust and Plan, as amended. Includes an aggregate of 7,837 unvested restricted shares of Common Stock, 16,121 vested restricted shares of Common Stock held in escrow until the Reporting Person's retirement and 5,540 shares of Common Stock, issued as Performance Earned Restricted Stock. The Stock Appreciation Rights vested on July 25, 2017, 2018, 2019 and 2020. Stock Appreciation Rights granted in exempt transactions under Rule 16b-3. These Stock Appreciation Rights vest in four equal annual installments commencing one year after the date of grant. These Stock Appreciation Rights were granted between 2017 and 2025 and expire 10 years from the date of grant. /s/ Janeen B. Kastner, by Gregory J. Dziak, here attorney-in-fact pursuant to Power of Attorney dated October 9, 2014 on file with the Commission 2026-04-21