X0306 4 2013-03-12 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 2013-03-12 4 M 0 25000 35.63 A 35360 D Common Stock 2013-03-12 4 F 0 16973 79.11 D 18387 D Common Stock 66.276 I By Ecolab Savings Plan Employee Stock Option (Right to Buy) 35.63 2013-03-12 4 M 0 25000 0.00 D 2009-12-03 2018-12-03 Common Stock 25000 3300 D Reflects the reporting person's payment of the exercise price and witholding 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 February 28, 2013. (The 66.276 UNITS are the equivalent of approximtely 123 shares of the issuer's Common Stock.) Option granted under the Ecolab Inc. 2005 Stock Incentive Plan. 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. David F. Duvick, as Attorney-in-Fact for Larry L. Berger 2013-03-13