ECL: Leadership change

Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers . ​ On May 7, 2026, the Board of Directors (the “Board”) of Ecolab Inc. (the “Company”) elected Bryce L. Mewhorter to the position of Senior Vice President and Corporate Controller, including to serve as the Company’s principal accounting officer, effective on the first day after the Company files its Quarterly Report on Form 10-Q for the second quarter of 2026. Jennifer J. Bradway will continue to serve in her current role as Senior Vice President and Corporate Controller until the effectiveness of Mr. Mewhorter’s election. Ms. Bradway will then assume a different position at the Company. ​ Mr. Mewhorter, age 51, currently serves as Senior Vice President of Finance Global Water, a position he has held since 2019. He joined the Company in 1998 and held positions of increasing responsibility in Institutional and Corporate Planning and Analysis before assuming finance leadership positions as Controller Food Safety Specialties, Controller Global QSR, Vice President of Finance North America Institutional, Senior Vice President of Finance Global Institutional and Senior Vice President of Finance Global Water. ​ Mr. Mewhorter will participate in the Company’s regular compensation arrangements for executive officers. Additional information about the Company’s executive compensation program can be found in the proxy statement (the “Proxy Statement”) for the Company’s 2026 Annual Meeting of Stockholders (the “Annual Meeting”). ​ There are no transactions between each of Mr. Mewhorter (and his immediate family) and the Company that require disclosure in accordance with Item 404(a) of Regulation S-K. ​ ​ Item 5.07 Submission of