X0306 4 2020-05-01 0 0000031462 ECOLAB INC. ECL 0001471500 Beck Christophe 1 ECOLAB PLACE SAINT PAUL MN 55102 0 1 0 0 President & COO Common Stock 2020-05-01 4 M 0 2100 48.055 A 34383 D Common Stock 2020-05-01 4 F 0 1246 189.530 D 33137 D Common Stock 2020-05-01 4 M 0 30700 55.595 A 63837 D Common Stock 2020-05-01 4 F 0 18897 189.530 D 44940 D Common Stock 1211.774 D Employee Stock Option (Right to Buy) 48.055 2020-05-01 4 M 0 2100 0 D 2011-12-01 2020-12-01 Common Stock 2100 0 D Employee Stock Option (Right to Buy) 55.595 2020-05-01 4 M 0 30700 0 D 2012-12-01 2021-12-01 Common Stock 30700 0 D Reflects the reporting person's payment of the exercise price and withholding taxes for a stock option issued in accordance with Rule 16b-3 by delivering or withholding shares of Ecolab common stock. Number of UNITS in the Ecolab Stock Fund of the Ecolab Savings Plan (401(k) Plan) as of March 31, 2020. Includes 57.603 UNITS acquired since the reporting person's last report. (The 1,211.774 UNITS are the equivalent of approximately 2,226 SHARES of the issuer's Common Stock.) The option became 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. The date listed in the "Date Exercisable" column represents the first anniversary date of the date of grant. /s/ David F. Duvick, as Attorney-in-Fact for Christophe Beck 2020-05-04