Ecolab (ECL)

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-05-15 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: ECOLAB INC. (ECL) CIK: 0000031462 --- Reporting Owner --- Name: Green Eric Mark CIK: 0001336007 Role: Director --- Derivative Transactions --- [Transaction #1] Security: Non-Employee Director Stock Option (Right to Buy) Date: 2026-05-15 | Code: A (Grant or award) Shares: +732 | Price: $0.00 Exercisable: N/A | Expires: 2036-05-15 Shares Owned After: 732 | Ownership: D (Direct) Footnotes: [F1] The option will become exercisable, on a cumulative basis, as to 25% of the option shares (excluding any fractional portion less than one share), on the last day of each of the first, second and third three-month periods following its date of grant and as to the remaining shares on the earlier of the last day of the fourth three-month period following its date of grant or the company's next annual meeting date; provided, however, that if a Change in Control of the Company (as that term is defined in the Ecolab Inc. 2001 Non-Employee Director Stock Option and Deferred Compensation Plan) will occur, then the option will become immediately exercisable in full. The date listed in the Date Exercisable column represents the first vesting date. --- Holdings --- [Holding #1] Security: Common Stock Ownership: D (Direct) --- Footnotes (Complete Index) --- F1: The option will become exercisable, on a cumulative basis, as to 25% of the option shares (excluding any fractional portion less than one share), on the last day of each of the first, second and third three-month periods following its date of grant and as to the remaining shares on the earlier of the last day of the fourth three-month period following its date of grant or the company's next annual meeting date; provided, however, that if a Change in Control of the Company (as that term is defined in the Ecolab Inc. 2001 Non-Employee Director Stock Option and Deferred Compensation Plan) will occur, then the option will become immediately exercisable in full. The date listed in the Date Exercisable column represents the first vesting date. --- Signature --- /s/ /s/ Corinne Lawson, as Attorney-in-Fact for Eric M. Green (2026-05-19)