UMB FINANCIAL CORP

The Sarbanes-Oxley Act of 2002, as amended, requires the Chief Executive Officer and the Chief Financial Officer to make certain certifications under this Form 10-Q with respect to the Company’s disclosure controls and procedures and internal control over financial reporting. The Company has a Code of Ethics that expresses the values that drive employee behavior and maintains the Company’s commitment to the highest standards of ethics.

Disclosure Controls and Procedures

The Company’s management, with the participation of the Company's Chief Executive Officer and Chief Financial Officer, evaluated the effectiveness of the Company's “disclosure controls and procedures” (as such term is defined in Rule 13a-15(e) and Rule 15d-15(e) under the Securities Exchange Act of 1934, as amended (the Exchange Act)) as of the end of the period covered by this Form 10-Q. Based on such evaluation, the Company’s Chief Executive Officer and Chief Financial Officer concluded that, as of the end of the period covered by this Form 10-Q, the Company’s disclosure controls and procedures were effective for ensuring that the Company’s SEC filings are recorded, processed, summarized, and reported within the time period required and that information required to be disclosed by the Company is accumulated and communicated to the Company’s management, including its Chief Executive Officer and Chief Financial Officer, as appropriate to allow timely decisions regarding required disclosures.

Internal Control Over Financial Reporting

There has been no change in the Company’s internal control over financial reporting (as such term is defined in Rule 13a-15(f) under the Exchange Act) during the three months ended September 30, 2026 that has materially affected, or is reasonably likely to materially affect, the Company’s internal control over financial reporting.