144 0001471500 XXXXXXXX LIVE 0000031462 Ecolab Inc. 001-09328 1 Ecolab Place St. Paul MN 55102 1-800-232-6522 Christophe Beck Officer Common Stock U.S. Bank N.A. 1555 N. River Center Drive Suite 302 Milwaukee WI 53212 17862 4927054 280328603 08/18/2026 NYSE Common Stock 02/21/2019 Performance-based restricted stock unit vesting Issuer N 1055 02/21/2019 Employee compensation Common Stock 05/01/2020 Employee stock option exercise Issuer N 10820 05/01/2020 Net exercise Common Stock 08/02/2021 Employee stock option exercise Issuer N 5987 08/02/2021 Broker-assisted cashless exercise Y 08/18/2026 Corinne Lawson, as Attorney-in-Fact for Christophe Beck