Exhibit 99.1

UMB Financial Corporation Reports First Quarter 2016 Earnings of $36.2 million,

or $0.74 per Diluted Share

KANSAS CITY, Mo. (April 26, 2016) – UMB Financial Corporation (Nasdaq: UMBF), a diversified financial holding company, announced earnings for the first quarter 2016 of $36.2 million or $0.74 per diluted share, compared to $29.6 million or $0.60 per diluted share in the fourth quarter 2015 (linked quarter) and $33.8 million or $0.74 per diluted share during the first quarter 2015.

On a non-GAAP operating basis, which is reconciled to comparable GAAP financial measures later in this release, net operating income for the first quarter 2016 was $38.6 million or $0.79 per diluted share, compared to $34.2 million or $0.70 per diluted share on a linked quarter basis and $33.0 million or $0.73 per diluted share for the first quarter 2015.

“UMB began the year by posting another quarter of double-digit year-over-year loan growth and making good progress against our expense initiatives implemented in 2015,” said Mariner Kemper, chairman and chief executive officer. “Total loan balances increased 29.4 percent from March 31, 2015 to March 31, 2016. Loans produced by legacy UMB lenders increased 16.0 percent during that period, once again outpacing industry averages. In addition, we recognized savings of $4.9 million in the first quarter related to our efficiency initiative. I am pleased with the results we’ve posted and look forward to our continued growth.”

Net interest income

Noninterest income

Noninterest expense

Efficiency Initiatives

In 2015, the company announced efficiency initiatives with cost savings expected to be recognized as follows: $6.8 million in 2015, $22.6 million in 2016, and annualized savings of $32.9 million in 2017 and beyond. As an update, the company recognized $9.5 million of these cost savings in 2015, and $4.9 million in the first quarter 2016, and expects to recognize an additional $15.9 million in the remainder of 2016 and annualized savings of $32.9 million beginning in 2017.

Conference Call

The company plans to host a conference call to discuss its first quarter 2016 earnings results on April 27, 2016 at 8:30 a.m. (CT). Interested parties may access the call by dialing (toll-free) 877-267-8760 or (U.S.) 412-542-4148 and requesting to join the UMB Financial call. The live call can also be accessed by visiting the investor relations area of umbfinancial.com or by using the following the link:

UMB Financial 1Q 2016 Conference Call

A replay of the conference call may be heard through May 12, 2016, by calling (toll-free) 877-344-7529 or (U.S.) 412-317-0088. The replay pass code required for playback is 10083904. The call replay may also be accessed via the company’s website umbfinancial.com by visiting the investor relations area.

Non-GAAP Financial Information

In this release, we provide information using net operating income, operating earnings per share (operating EPS), operating return on average equity (operating ROE), operating return on average assets (operating ROA), operating noninterest expense, and operating efficiency ratio, all of which are non-GAAP financial measures. This information supplements the results that are reported according to generally accepted accounting principles (GAAP) and should not be viewed in isolation from, or as a substitute for, GAAP results. The differences between the non-GAAP financial measures—net operating income, operating EPS, operating ROE, operating ROA, operating noninterest expense and operating efficiency ratio—and the comparable GAAP financial measures are reconciled later in this release. The company believes that these non-GAAP financial measures and the reconciliations may be useful to investors because they adjust for acquisition- and severance-related items that management does not believe reflect the company’s fundamental operating performance.

Net operating income for the relevant period is defined as GAAP net income, adjusted to reflect the after-tax impact of excluding the following: (i) fair value adjustments to contingent consideration for the acquisitions of Prairie Capital Management, LLC and Reams Asset Management Company, (ii) expenses related to the acquisition of Marquette, and (iii) non-acquisition severance expense. Operating EPS (basic and diluted) is calculated as net operating income, divided by the company’s average number of shares outstanding (basic and diluted) for the relevant period. Operating ROE is calculated as net operating income, divided by the company’s average total shareholders’ equity for the relevant period. Operating ROA is calculated as net operating income, divided by the company’s average assets for the relevant period. Operating noninterest expense for the relevant period is defined as GAAP noninterest expense, adjusted to reflect the pre-tax impact of non-GAAP adjustments described in clauses i-iii above. Operating efficiency ratio is calculated as the company’s operating noninterest expense, less amortization of other intangibles, divided by the company’s tax equivalent net interest income plus noninterest income less gains on sales of securities available for sale.

Forward-Looking Statements:

This release contains, and our other communications may contain, forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. These statements can be identified by the fact that they do not relate strictly to historical or current facts—such as our statements about expected cost savings and other results of efficiency initiatives and our statements about asset sensitivity. Forward-looking statements often use words such as “believe,” “expect,” “anticipate,” “intend,” “estimate,” “project,” “outlook,” “forecast,” “target,” “trend,” “plan,” “goal,” or other words of comparable meaning or future-tense or conditional verbs such as “may,” “will,”

“should,” “would,” or “could.” Forward-looking statements convey our expectations, intentions, or forecasts about future events, circumstances, results, or aspirations. All forward-looking statements are subject to assumptions, risks, and uncertainties, which may change over time and many of which are beyond our control. You should not rely on any forward-looking statement as a prediction or guarantee about the future. Our actual future objectives, strategies, plans, prospects, performance, condition, or results may differ materially from those set forth in any forward-looking statement. Some of the factors that may cause actual results or other future events, circumstances, or aspirations to differ from those in forward-looking statements are described in our Annual Report on Form 10-K for the year ended December 31, 2015, our subsequent Quarterly Reports on Form 10-Q or Current Reports on Form 8-K, or other applicable documents that are filed or furnished with the SEC. Any forward-looking statement made by us or on our behalf speaks only as of the date that it was made. We do not undertake to update any forward-looking statement to reflect the impact of events, circumstances, or results that arise after the date that the statement was made. You, however, should consult further disclosures (including disclosures of a forward-looking nature) that we may make in any subsequent Annual Report on Form 10-K, Quarterly Report on Form 10-Q, Current Report on Form 8-K, or other applicable document that is filed or furnished with the SEC.

About UMB:

UMB Financial Corporation (Nasdaq: UMBF) is a diversified financial holding company headquartered in Kansas City, Mo., offering complete banking services, asset servicing and institutional investment management to customers. UMB operates banking and wealth management centers throughout Missouri, Illinois, Colorado, Kansas, Oklahoma, Nebraska, Arizona and Texas, as well as two national specialty-lending businesses. Subsidiaries of the holding company include companies that offer services to mutual funds and alternative-investment entities and registered investment advisors that offer equity and fixed income strategies to institutions and individual investors. For more information, visit umb.com, umbfinancial.com, blog.umb.com or follow us on Twitter at @UMBBank, Facebook at facebook.com/UMBBank and LinkedIn at linkedin.com/company/umb-bank.

Operating noninterest expense and operating efficiency ratio non-GAAP reconciliation

(unaudited, dollars in thousands)