COMMERCE BANK ANNOUNCES NEW BRANCH MANAGER

(Springfield, MO – September 16, 2010) – John Himmel, Chairman, Commerce Bank, Springfield Region, recently announced that Jolene Elliott has been promoted to Assistant Vice President and Branch Manager of Commerce Bank’s Sunshine Banking Center, 3301 E. Sunshine. As branch manager, Elliott is responsible for business development and customer service related to the bank’s consumer banking, lending and small business services.

Elliott has 15 years of banking experience and prior to her promotion was a part of Commerce Bank’s branch manager trainee program. Active in the community, Elliott is a volunteer through Commerce Bank’s United Way and Relay for Life initiatives and a past member of Junior League of Springfield.

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 Bank 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 370 locations in the Central United States. Commerce Bancshares 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†