144 0001989181 XXXXXXXX LIVE 0000031462 Ecolab Inc. 001-09328 1 Ecolab Place St. Paul MN 55102 1-800-232-6522 Cook Gregory B Officer Common Stock Morgan Stanley Smith Barney LLC - Executive Services 200 W Civic Center Drive 4th Floor Sandy UT 84070 4567 1298855 280328603 08/11/2026 NYSE Common Stock 05/04/2026 Restricted Stock Unit Vesting Issuer N 8396 05/04/2026 Employee compensation Y 08/11/2026 Corinne Lawson, as Attorney-in-Fact for Gregory B. Cook