144 0001589791 XXXXXXXX LIVE 0000031462 ECOLAB INC. 001-09328 1 ECOLAB PLACE ST. PAUL MN 55102 651-250-3323 Suzanne M. Vautrinot Director Common Stock Wells Fargo Clearing Services

1 North Jefferson Avenue St. Louis MO 63103

1004 255247 281437502 05/27/2026 NYSE Common Stock 05/22/2026 Non-Employee Director Stock Option Exercise Issuer N 1004 05/22/2026 Net exercise Y 05/27/2026 /s/ Corinne Lawson, as Attorney-in-Fact for Suzanne M. Vautrinot