ECOLAB INC.

As of September 30, 2026, we carried out an evaluation, under the supervision and with the participation of our management, including our Chairman, President and Chief Executive Officer and our Chief Financial Officer, of the effectiveness of the design and operation of our disclosure controls and procedures. Based upon that evaluation, our Chairman, President and Chief Executive Officer and our Chief Financial Officer concluded that our disclosure controls and procedures are effective.

During the period July 1, 2026 through September 30, 2026, there were no changes in our internal control over financial reporting that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

We are continuing our implementation of our enterprise resource planning (“ERP”) system upgrades, which are expected to occur in phases over the next several years. These upgrades, which include supply chain and certain finance functions, are expected to improve the efficiency of certain financial and related transactional processes. These upgrades of the ERP systems will affect the processes that constitute our internal control over financial reporting and will require testing for effectiveness.