144 0001902394 XXXXXXXX LIVE 0000031462 ECOLAB INC. 001-09328 1 ECOLAB PLACE ST. PAUL MN 55102 651-250-2492 Jennifer J. Bradway Officer Common Stock Morgan Stanley Smith Barney LLC - Executive Services

200 W Civic Center Drive 4th Floor Sandy UT 84070

807 223232 283624912 08/13/2025 NYSE Common Stock 08/13/2025 Employee stock option exercise Issuer N 993 08/13/2025 Broker-assisted cashless exercise Y 08/13/2025 /s/ Corinne Lawson, as Attorney-in-Fact for Jennifer J. Bradway