X0306 4 2018-03-09 0 0000031462 ECOLAB INC. ECL 0001198768 SCHMECHEL DANIEL J 1 ECOLAB PLACE SAINT PAUL MN 55102 0 1 0 0 CFO and Treasurer Common Stock 2018-03-09 4 F 0 2202 131.18 D 142981.806 D Common Stock 2844.806 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 February 28, 2018. (The 2,844.806 UNITS are the equivalent of approximately 5,232 SHARES of the issuer's Common Stock.) /s/ David F. Duvick, Attorney-in-Fact for Daniel J. Schmechel 2018-03-13