Ecolab (ECL) 4: LARSON MICHAEL bought 2,300 shares of Common Stock at $115.… (Mar 30, 2026)

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-03-27 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: ECOLAB INC. (ECL) CIK: 0000031462 --- Reporting Owner --- Name: LARSON MICHAEL CIK: 0001098825 Role: Director --- Non-Derivative Transactions --- [Transaction #1] Security: Common Stock Date: 2026-03-27 | Code: M (Exercise of derivative) Shares: +2,300 | Price: $115.08 Total Value: $264,672.50 Shares Owned After: 19,848.43 | Ownership: D (Direct) [Transaction #2] Security: Common Stock Date: 2026-03-27 | Code: F (Payment of exercise/tax) Shares: -1,006 | Price: $262.88 Total Value: $264,462.31 Shares Owned After: 18,842.43 | Ownership: D (Direct) Footnotes: [F1] Reflects the reporting person's payment of the exercise price for a stock option issued in accordance with Rule 16b-3 by delivering or withholding shares of Ecolab common stock. --- Derivative Transactions --- [Transaction #1] Security: Non-Employee Stock Option (Right to Buy) Date: 2026-03-27 | Code: M (Exercise of derivative) Shares: -2,300 | Price: $0.00 Exercisable: N/A | Expires: 2026-05-05 Shares Owned After: 0 | Ownership: D (Direct) Footnotes: [F2] The option became 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 last day of the fourth three-month period following its date of grant. The date listed in the "Date Exercisable" column represents the first vesting date. --- Footnotes (Complete Index) --- F1: Reflects the reporting person's payment of the exercise price for a stock option issued in accordance with Rule 16b-3 by delivering or withholding shares of Ecolab common stock. F2: The option became 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 last day of the fourth three-month period following its date of grant. The date listed in the "Date Exercisable" column represents the first vesting date. --- Signature --- /s/ /s/ Corinne Lawson, as Attorney-in-Fact for Michael Larson (2026-03-30)