Ecolab (ECL)

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-09-11 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: ECOLAB INC. (ECL) CIK: 0000031462 --- Reporting Owner --- Name: Green Eric Mark CIK: 0001336007 Role: Director --- Non-Derivative Transactions --- [Transaction #1] Security: Common Stock Date: 2026-09-11 | Code: P (Open market purchase) Shares: +3,370 | Price: $276.58 Total Value: $932,064.49 Shares Owned After: 7,627.28 | Ownership: D (Direct) Footnotes: [F1] This transaction was executed in multiple trades at prices ranging from $276.370 to $276.890, inclusive. The price reported above reflects the weighted average purchase 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. [Transaction #2] Security: Common Stock Date: 2026-09-11 | Code: P (Open market purchase) Shares: +320 | Price: $277.29 Total Value: $88,733.12 Shares Owned After: 7,947.28 | Ownership: D (Direct) Footnotes: [F2] This transaction was executed in multiple trades at prices ranging from $277.120 to $277.410, inclusive. The price reported above reflects the weighted average purchase 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. --- Footnotes (Complete Index) --- F1: This transaction was executed in multiple trades at prices ranging from $276.370 to $276.890, inclusive. The price reported above reflects the weighted average purchase 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: This transaction was executed in multiple trades at prices ranging from $277.120 to $277.410, inclusive. The price reported above reflects the weighted average purchase 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. --- Signature --- /s/ /s/ Youhao Dong, as Attorney-in-Fact for Eric M. Green (2026-09-14)