COMMERCE BANCSHARES, INC. 9CBSH) ANNOUNCES PRESENTATION TO ANALYSTS AND INVESTORS AUGUST 9 AND 10, 2010

(St. Louis, MO – August 3, 2010) – Commerce Bancshares, Inc. (NASDAQ: CBSH) announced today that Charles G. Kim, chief financial officer, and Jeffery D. Aberdeen, controller of Commerce Bancshares, Inc., will make a presentation to small groups of analysts and investors in San Francisco, Calif., and Portland, Ore., on August 9 and 10, 2010.

The presentation will be an update of the company's financial performance and general business plan. The presentation will be available via www.commercebank.com/ir.

About Commerce Bank

Commerce Bancshares Inc. (NASDAQ: CBSH) is an $18.4 billion regional bank holding company. For more than 140 years, Commerce has been meeting the financial services needs of individuals and businesses. Commerce provides a diversified line of financial services, including business and personal banking, wealth management, financial planning, and investments through its affiliated companies. Commerce operates in the Midwest, primarily in Missouri, Kansas, Illinois, Oklahoma and Colorado with more than 370 locations and also has operating subsidiaries involved in mortgage banking, credit related insurance, venture capital and real estate activities.

For additional information contact:

Email: mymoney@commercebank.com†