#1 Reflects the reporting person's payment of the exercise price for a stock option issued in accordance with Rule 16b-3 by delivering or withholding shares of Ecolab common stock.

#1 Represents the third (out of four) vesting of units from the grant of 9,379 restricted stock units made on February 25, 2021. The vesting schedule for the grant provided for the units to vest, subject to continued employment, as to one-fourth of the units (excluding any fractional portion less than one unit), on each of the first, second and third anniversaries of the date of grant and as to the remaining units on the fourth anniversary of the date of grant. Restricted stock units convert into common stock on a one-for-one basis.

#2 Reflects the reporting person's payment of minimum statutory tax obligations by withholding shares of Ecolab Common Stock incident to the vesting of restricted stock units in accordance with Rule 16b-3.

#1 Represents the third (out of four) vesting of units from the grant of 9,379 restricted stock units made on February 25, 2021. The vesting schedule for the grant provided for the units to vest, subject to continued employment, as to one-fourth of the units (excluding any fractional portion less than one unit), on each of the first, second and third anniversaries of the date of grant and as to the remaining units on the fourth anniversary of the date of grant. Restricted stock units convert into common stock on a one-for-one basis.

#2 Reflects the reporting person's payment of minimum statutory tax obligations by withholding shares of Ecolab Common Stock incident to the vesting of restricted stock units in accordance with Rule 16b-3.

#1 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.