X0306 4 2014-12-03 0 0000031462 ECOLAB INC ECL 0001433832 Berger Larry L 370 WABASHA STREET N SAINT PAUL MN 55102 0 1 0 0 Executive VP & CTO Common Stock 24307 D Common Stock 67.452 I By Ecolab Savings Plan Employee Stock Option (Right to Buy) 107.685 2014-12-03 4 A 0 12235 0.00 A 2015-12-03 2024-12-03 Common Stock 12235 12235 D Number of UNITS in the Ecolab Stock Fund of the Ecolab Savings Plan (401(k) Plan) as of November 30, 2014. Includes 0.171 UNITS acquired since the reporting person's last report. (The 67.452 UNITS are the equivalent of approximately 125 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. David F. Duvick, as Attorney-in-Fact for Larry L. Berger 2014-12-05