X0306 4 2019-12-03 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 2019-06-03 5 G 0 E 274 0 D 554304 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 5639.440 I By Ecolab Savings Plan Employee Stock Option (Right to Buy) 184.390 2019-12-03 4 A 0 114381 0 A 2020-12-03 2029-12-03 Common Stock 114381 114381 D Number of UNITS in the Ecolab Stock Fund of the Ecolab Savings Plan (401(k) Plan) as of November 30, 2019. Includes 39.847 UNITS acquired since the reporting person's last report. (The 5,639.44 UNITS are the equivalent of approximately 10,344 SHARES of the issuer's Common Stock.) The option will be exercisable, on a cumulative basis, as to one-third of the option shares (excluding any fractional portion less than one share), on each of the first and second anniversaries of the date of grant and as to the remaining shares on the third anniversary of the date of grant. /s/ David F. Duvick, as Attorney-in-Fact for Douglas M. Baker, Jr. 2019-12-05