X0306 4 2020-02-26 0 0000031462 ECOLAB INC. ECL 0001198753 BAKER DOUGLAS M JR 1 ECOLAB PLACE SAINT PAUL MN 55102 1 1 0 0 Chairman and CEO Common Stock 2020-02-26 4 A 0 41509 0 A 619657 D Common Stock 2020-02-26 4 F 0 18929 195.740 D 600728 D Common Stock 7050 I By Wife Common Stock 72850 I By Julie M. Baker 2012 Irrevocable Trust Common Stock 72500 I By Douglas M. Baker, Jr. 2012 Irrevocable Trust Common Stock 5653.151 I By Ecolab Savings Plan Reflects the reporting person's payment of minimum statutory tax obligations by withholding shares of Ecolab Common Stock incident to the vesting of performance-based restricted stock units in accordance with Rule 16b-3. Number of UNITS in the Ecolab Stock Fund of the Ecolab Savings Plan (401(k) Plan) as of January 31, 2020. (The 5,653.151 UNITS are the equivalent of approximately 10,364 SHARES of the issuer's Common Stock.) /s/ David F. Duvick, as Attorney-in-Fact for Douglas M. Baker, Jr. 2020-02-28