X0306 4 2017-12-04 0 0000031462 ECOLAB INC. ECL 0001433832 Berger Larry L 1 ECOLAB PLACE SAINT PAUL MN 55102 0 1 0 0 Executive VP & CTO Common Stock 2017-12-04 4 S 0 5197 137.370 D 33110 D Common Stock 69.856 D Number of UNITS in the Ecolab Stock Fund of the Ecolab Savings Plan (401(k) Plan) as of November 30, 2017. Includes 0.587 UNITS acquired since the reporting person's last report. (The 69.856 UNITS are the equivalent of approximately 128 SHARES of the issuer's Common Stock.) /s/ David F. Duvick, as Attorney-in-Fact for Larry L. Berger 2017-12-06