X0306 4 2016-12-07 0 0000031462 ECOLAB INC. ECL 0001471500 Beck Christophe 370 WABASHA STREET NORTH SAINT PAUL MN 55102 0 1 0 0 EVP & Pres-Global Water Common Stock 17675 D Common Stock 1098.729 I By Ecolab Savings Plan Employee Stock Option (Right to Buy) 117.73 2016-12-07 4 A 0 23833 0 A 2017-12-07 2026-12-07 Common Stock 23833 23833 D Number of UNITS in the Ecolab Stock Fund of the Ecolab Savings Plan (401(k) Plan) as of November 30, 2016. Includes 3.234 UNITS acquired since the reporting person's last report. (The 1,098.729 UNITS are the equivalent of approximately 2,025 SHARES of the issuer's Common Stock.) The option will be 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. /s/ David F. Duvick, as Attorney-In-Fact for Christophe Beck 2016-12-09