X0303 4 2010-05-10 0 0000031462 ECOLAB INC ECL 0001189430 LEVIN JERRY W J. W. LEVIN PARTNERS, LLC 9 WEST 57TH STREET, 26TH FLOOR NEW YORK NY 10019 1 0 0 0 Common Stock 2010-05-10 4 S 0 45000 48.6417 D 45006.81 D The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $48.51 to $48.70, inclusive. The reporting person undertakes to provide to Ecolab Inc., any security holder of Ecolab Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (1) to this Form 4. /s/David F. Duvick, Attorney-in-Fact for Jerry Levin 2010-05-12