Atmus Filtration Technologies Inc.

Evaluation of Disclosure Controls and Procedures

The Company’s disclosure controls and procedures are designed to ensure that information required to be disclosed by the Company in the reports that it files or submits under the Securities Exchange Act of 1934, as amended (the “Exchange Act”) is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms, and that such information is accumulated and communicated to management, including its Chief Executive Officer and Chief Financial Officer, as appropriate to allow timely decisions regarding required disclosure.

As requiredby Rule 13a-15(b) under the Exchange Act, our management, with the participation of our Chief Executive Officer and Chief Financial Officer, carried out an evaluation of the effectiveness of our disclosure controls and procedures as of September 30, 2025. Based upon their evaluation, our Chief Executive Officer and Chief Financial Officer concluded that our disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act) were effective as of September 30, 2025.

Changes in Internal Control over Financial Reporting

The Company is in the process of implementing a broad, multi-year, technology transformation project to modernize enterprise resource planning, middleware and legacy systems to achieve better process efficiencies across customer service, merchandising, sourcing, payroll and accounting through the use of various solutions. During the quarter ended September 30, 2025, the Company continued to implement a new enterprise resource planning system for several of our locations. There have been no material additional implementations during the quarter ended September 30, 2025. As the Company’stechnology transformation project continues, the Company continues to emphasize the maintenance of effective internal controls and assessment of the design and operating effectiveness of key control activities throughout development and deployment of each phase and will evaluate as additional phases are deployed.

There were no other changes in the Company’s internal control over financial reporting (as defined in Rule 13a-15(f) under the Exchange Act) that materially affected, or were reasonably likely to materially affect, Atmus’ internal control over financial reporting during the quarter ended September 30, 2025.

Part II - Other Information