RPM INTERNATIONAL INC.

RPM International Inc. is a New York Stock Exchange-listed company with approximately 127.6 million shares of common stock outstanding as of 14 August 2026, the record date stated in its proxy statement filed with the SEC. As a widely held public company, ownership of RPM International Inc. is disclosed mainly through Schedule 13G filings made by institutional investment managers holding 5% or more of its common stock, rather than through a conventional private shareholder register.

The most recent Schedule 13G filings identified on the SEC’s EDGAR system, both covering the period ended 31 March 2026 and filed in late April 2026, show Vanguard-affiliated investment managers separately reporting beneficial ownership of 6,709,171 shares (5.23%) and 7,177,004 shares (5.60%) of RPM International Inc. common stock. These verified figures differ from the Vanguard and iShares Core S&P Mid-Cap ETF holdings and percentages shown elsewhere on this profile; that data could not be corroborated against the most recently filed SEC disclosures and may reflect an earlier or differently calculated snapshot. No other holder of 5% or more could be independently confirmed from a primary source at the time of research.

Data availability for RPM International Inc. is best described as major shareholders only: SEC rules require public disclosure only for holders of 5% or more of a class of stock, so the large majority of RPM International Inc.’s shareholder base, including most individual and smaller institutional holders, is not itemized in any public filing. No ultimate beneficial owner has been identified for RPM International Inc.; its largest disclosed shareholders are investment-management firms holding shares on behalf of pooled fund clients rather than individuals, and no filing reviewed identifies any shareholder with a controlling stake.

RPM International Inc. lists 17 executive officers on its official corporate website as of the September 2026 research date, all shown as active with no resignation, removal or termination recorded in the sources reviewed. The senior officers are Frank C. Sullivan, Chairman and Chief Executive Officer; David C. Dennsteadt, President and Chief Operating Officer; Russell L. Gordon, Vice President and Chief Financial Officer; and Tracy D. Crandall, Vice President – General Counsel and Chief Compliance Officer. Specific appointment dates are not disclosed for most of these roles in the sources reviewed, other than the recent change described below. Nationality is not officially disclosed for any RPM International Inc. officer in the sources available; U.S. corporate and securities filings of this kind do not require nationality disclosure. Where a Medina, Ohio address appears against an officer in company records, this is the company’s corporate headquarters and correspondence address rather than a personal residence, and it should not be read as evidence of an officer’s nationality or country of residence.

Recent officer changes: effective 17 July 2026, RPM International Inc. named David C. Dennsteadt as President and Chief Operating Officer. Dennsteadt previously served as Executive Vice President overseeing the company’s corporate administrative functions, a role he had held since 2025, having earlier served as Group President of RPM International Inc.’s Performance Coatings Group from 2018 to 2025. The appointment, which expanded his responsibilities to include strategy and oversight of RPM International Inc.’s operating groups and corporate development, was announced in an official company release and reported in a Form 8-K filed with the SEC.

Data availability: officer information for RPM International Inc. in the sources reviewed reflects current appointments only; historical or resigned officers were not itemized, and appointment dates for officers other than the July 2026 change were not disclosed in the sources available.

RPM International Inc. does not disclose a parent company in its filings with the U.S. Securities and Exchange Commission. As a New York Stock Exchange-listed company with dispersed institutional and public ownership, no corporate parent has been identified for RPM International Inc., and it functions as the ultimate parent of its own consolidated corporate group.

RPM International Inc.’s Exhibit 21 filing accompanying its Form 10-K for the fiscal year ended 31 May 2023, the most recent version of this exhibit reviewed for this profile, lists numerous direct and indirect subsidiaries through which the group conducts its coatings, sealants and building-materials businesses. These include Rust-Oleum Corporation, DAP Products Inc., DAP Global Inc., Carboline Company and Carboline Global Inc. (all Delaware entities) and Tremco Incorporated (an Ohio entity), together with related Tremco holding entities. RPM International Inc.’s public filings identify these as consolidated subsidiaries but do not report individual ownership percentages for each, consistent with standard SEC Exhibit 21 disclosure practice, which lists subsidiary names and jurisdictions rather than percentage stakes.

Data availability for RPM International Inc.’s group structure is best described as partial: the existence, names and jurisdictions of numerous operating subsidiaries are confirmed through SEC filings, but ownership percentages are not disclosed, and a more recent Exhibit 21 filing may list additional, renamed or divested entities that were not independently checked for this profile.