Comparison of Cumulative Total Return

Among RPM International Inc., the S&P 500 Index and two Peer Groups

This graph compares the cumulative ten-year total return provided shareholders on RPM International Inc.’s common stock relative to the cumulative total returns of the S&P 500 Index and two customized peer groups whose individual companies are listed in footnotes 1 and 2 below. An investment of $100 (with reinvestment of all dividends) is assumed to have been made in RPM common stock, in each of the peer groups, and the index on 5/31/2007, and their relative performance is tracked through 5/31/2017.

(1) The prior peer group includes: Akzo Nobel N.V., Ferro Corporation, GCP Applied Technologies Inc., H.B. Fuller Company, Masco Corporation, PPG Industries, Inc. and The Sherwin-Williams Company.

(2) The current peer group includes: Akzo Nobel N.V., Axalta Coating Systems Ltd, Ferro Corporation, GCP Applied Technologies Inc., H.B. Fuller Company, Masco Corporation, PPG Industries, Inc. and The Sherwin-Williams Company.

With appreciation in RPM’s stock price, an investment in the company is attractive to both individual and institutional investors. RPM’s total return – share price appreciation plus dividends reinvested – has outpaced the Standard & Poor’s 500 by 70 percent over the past 10 years, as shown in the chart above.