[3] UMB operates banking and wealth management centers in Missouri, Illinois, Colorado, Kansas, Oklahoma, Nebraska, Arizona and North Texas.

In 2004, Peter deSilva became the president and Mariner Kemper became chairman and CEO of UMB Financial Corporation.

[4][12] In June 2015, UMB acquired Marquette Financial Companies, which expanded its operations into the U.S states of Minnesota, Texas and Arizona.

[13][14][15] In April 2017, the firm sold Reams Asset Management and Scouts Investments to Raymond James Financial for $172.5 million.

[16] As of December 2019, UMB has 91 branches located across eight U.S. states: Missouri, Illinois, Colorado, Kansas, Oklahoma, Nebraska, Arizona and Texas.