X0304 4/A 2011-12-01 2011-12-05 0 0000031462 ECOLAB INC ECL 0001343564 Fyrwald J Erik ECOLAB INC. 370 WABASHA STREET N. ST. PAUL MN 55102 0 1 0 0 President Common Stock 2011-12-01 4 A 0 125968 A 125968 D Employee Stock Option (Right to Buy) 40.53 2011-12-01 4 A 0 56294 0.00 A 2011-12-01 2021-02-11 Common Stock 56294 56294 D Employee Stock Option (Right to Buy) 32.35 2011-12-01 4 A 0 49431 0.00 A 2011-12-01 2020-02-09 Common Stock 49431 49431 D Employee Stock Option (Right to Buy) 17.55 2011-12-01 4 A 0 113074 0.00 A 2011-12-01 2019-02-12 Common Stock 113074 113074 D Employee Stock Option (Right to Buy) 30.67 2011-12-01 4 A 0 27183 0.00 A 2018-03-07 Common Stock 27183 27183 D Employee Stock Option (Right to Buy) 30.67 2011-12-01 4 A 0 227659 0.00 A 2011-12-01 2018-03-07 Common Stock 227659 227659 D The indicated number of shares represents the number of shares of the common stock of Ecolab, Inc. ("Ecolab") issuable to the reporting person as merger consideration pursuant to the Agreement and Plan of Merger dated as of July 19, 2011 (the "Merger Agreement") between and among Ecolab, Sustainability Partners Corporation and Nalco Holding Company ("Nalco") based on the individual stock-cash election made by the reporting person in accordance with the Merger Agreement with respect to the outstanding shares of Nalco common stock beneficially owned by the reporting person as of immediately prior to the effective time of the merger contemplated by the Merger Agreement. The adjustment and reallocation calculations provided for in the Merger Agreement have been completed as of the date of this report and the indicated number of shares reflects the actual number of shares of Ecolab common stock issuable to the reporting person as merger consideration pursuant to the Merger Agreement. These options were reported in Mr. Fyrwald's Form 4 filed on December 5, 2011. Due to rounding calculations, Columns 5, 7 and 9 of Table II provided an inaccurate number of shares of Ecolab Inc. common stock, in the aggregate, that each such options were converted into pursuant to the Merger Agreement. This amended report includes corrected information in Columns 5, 7 and 9 of Table II. Acquired pursuant to the Merger Agreement upon the conversion of stock options to purchase 82,836 shares of Nalco common stock at an exercise price of $27.54 per share. Acquired pursuant to the Merger Agreement upon the conversion of stock options to purchase 72,738 shares of Nalco common stock at an exercise price of $21.98 per share. Acquired pursuant to the Merger Agreement upon the conversion of stock options to purchase 166,387 shares of Nalco common stock at an exercise price of $11.92 per share. Acquired pursuant to the Merger Agreement upon the conversion of stock options to purchase 40,000 shares of Nalco common stock at an exercise price of $20.84 per share. The option vests in four equal annual installments beginning on December 31, 2008. Acquired pursuant to the Merger Agreement upon the conversion of stock options to purchase 335,000 shares of Nalco common stock at an exercise price of $20.84 per share. David F. Duvick, as Attorney-in-Fact for J. Erik Frywald 2011-12-09