ECOLAB INC. (ECL) · Insider Trading (Form 4) SEC Filing

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-06-09 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: ECOLAB INC. (ECL) CIK: 0000031462 --- Reporting Owner --- Name: Brown Darrell R CIK: 0001727287 Role: Officer (Co-COO - Global Markets) --- Non-Derivative Transactions --- [Transaction #1] Security: Common Stock Date: 2026-06-09 | Code: M (Exercise of derivative) Shares: +10,000 | Price: $117.73 Total Value: $1,177,300.00 Shares Owned After: 42,733.364 | Ownership: D (Direct) [Transaction #2] Security: Common Stock Date: 2026-06-09 | Code: S (Open market sale) Shares: -10,000 | Price: $260.89 Total Value: $2,608,870.00 Shares Owned After: 32,733.364 | Ownership: D (Direct) Footnotes: [F1] This transaction was executed in multiple trades at prices ranging from $260.80 to $261.06, inclusive. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. --- Derivative Transactions --- [Transaction #1] Security: Employee Stock Option (Right to Buy) Date: 2026-06-09 | Code: M (Exercise of derivative) Shares: -10,000 | Price: $0.00 Exercisable: N/A | Expires: 2026-12-07 Shares Owned After: 0 | Ownership: D (Direct) Footnotes: [F2] The option became exercisable, on a cumulative basis, as to one-third of the option shares (excluding any fractional portion less than one share), on each of the first and second anniversaries of the date of grant and as to the remaining shares on the third anniversary of the date of grant. The date listed in the "Date Exercisable" column represents the first anniversary date of the grant. --- Footnotes (Complete Index) --- F1: This transaction was executed in multiple trades at prices ranging from $260.80 to $261.06, inclusive. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. F2: The option became exercisable, on a cumulative basis, as to one-third of the option shares (excluding any fractional portion less than one share), on each of the first and second anniversaries of the date of grant and as to the remaining shares on the third anniversary of the date of grant. The date listed in the "Date Exercisable" column represents the first anniversary date of the grant. --- Signature --- /s/ /s/ Youhao Dong, as Attorney-in-Fact for Darrell R. Brown (2026-06-10)