X0609 4 2026-08-18 0 0000031462 ECOLAB INC. ECL 0001471500 Beck Christophe false 1 ECOLAB PLACE ST. PAUL MN 55102 1 1 0 0 CHAIRMAN, PRESIDENT & CEO 0 Common Stock 2026-08-18 4 S 0 17862 280.138 D 72932.118 D Common Stock 1755.391 I By Ecolab Savings Plan This transaction was executed in multiple trades at prices ranging from $279.950 to $280.400, inclusive. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. Number of UNITS in the Ecolab Stock Fund of the Ecolab Savings Plan (401(k) Plan) as of July 31, 2026. Includes 19.783 UNITS acquired since the reporting person's last report. (The 1,755.391 UNITS are the equivalent of approximately 3,221 SHARES of the issuer's Common Stock.) /s/ Corinne Lawson, as Attorney-in-Fact for Christophe Beck 2026-08-20