X0306 4 2019-03-08 0 0000031462 ECOLAB INC. ECL 0001275967 HANDLEY THOMAS W 1 ECOLAB PLACE SAINT PAUL MN 55102 0 1 0 0 President and COO Common Stock 2019-03-08 4 F 0 2957 166.22 D 132593.819 D Common Stock 7403 I By child #1 trust Common Stock 7403 I By child #2 trust Common Stock 569.258 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, 2019. (The 569.258 UNITS are the equivalent of approximately 1,045 SHARES of the issuer's Common Stock.) /s/ David F. Duvick, as Attorney-in-Fact for Thomas W. Handley 2019-03-08