COMMERCE BANK KU CARD TEXTBOOK SWEEPSTAKES

Winner receives $500 bookstore gift certificate

(Lawrence, KS – October 27, 2009) – Devinee Fitzgerald of Wichita, KS has won a $500 Commerce Bank gift certificate for the KU Bookstore in the Kansas Union in the Commerce Bank “KU Card Textbook” Sweepstakes. The 19-year old is a student at The University of Kansas, where she is majoring in Advertising.

Participants in the sweepstakes were entered to win by answering online questions about the KU Card on the microsite of the Commerce Bank website and completing a register-to-win form online at www.commercebank.com/kucard. The winner was drawn on October 1, 2009.

“Commerce Bank sponsored this promotion to help students learn about the functions of their KU ID Card, including the ability to pay for their purchases at the KU Bookstore on campus and at thousands of retailers nationwide,” said Mark Heider, President of Commerce Bank, Lawrence. “College students like Devinee find that it’s an easy and convenient way to make purchases. We are happy to award Devinee the $500 gift certificate.”

"I am absolutely thrilled about winning,” said Devinee. “I never expect to win drawings like this and it definitely made my day when I got the call!"

The Commerce Bank branch, on the campus of The University of Kansas, opened in 1998. It is a full-service branch serving the students, staff and faculty of The University of Kansas.

About Commerce Bank

Commerce Bank, N.A. is a subsidiary of Commerce Bancshares, Inc. (NASDAQ: CBSH), an $18 billion regional bank holding company. For more than 140 years, Commerce Bank has been meeting the financial services needs of individuals and businesses. Commerce Bank provides a diversified line of financial services, including business and personal banking, wealth management and estate planning and investments through its subsidiary and affiliated companies. Commerce Bank currently operates in approximately 350 locations in Missouri, Kansas, Illinois, Oklahoma and Colorado. Commerce Bancshares also has operating subsidiaries involved in mortgage banking, leasing, credit-related insurance, venture capital and real estate activities.

For additional information contact:

Email: mymoney@commercebank.com†