UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (MARK ONE) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2025 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to ____ Commission file number 001-38481 UMB FINANCIAL CORPORATION (Exact name of registrant as specified in its charter) (State or other jurisdiction of incor ...

Exhibit 99.1 UMB Financial Corporation News Release 1010 Grand Boulevard Kansas City, MO 64106 816.860.7000 umb.com //FOR IMMEDIATE RELEASE// Media Contact: Stephanie Hollander: 816.729.1027 Investor Relations Contact: Kay Gregory: 816.860.7106 UMB Financial Corporation Reports Second Quarter 2025 Results Second Quarter 2025 Financial Highlights (i) A non-GAAP financial measure reconciled later in this release to the nearest comparable GAAP measure. • GAAP net income available to common shareholders of $215 ...