BEUSAN JOINS COMMERCE BANK AS RETAIL BANKING OFFICER

(Columbia, MO – February 2, 2009) – Teresa Maledy, president, Commerce Bank, Central Missouri Region, recently announced that Gianina Beusan has joined Commerce as Retail Banking Officer and Branch Manager for the company’s Business Loop Banking Center, 500 Business Loop 70 West, Columbia. In her position, she is responsible for business development and customer service related to the branch’s banking and lending services for consumers and small business.

Beusan has more than 10 years banking experience and has a Bachelor’s of Science degree in Business Administration degree. Active in the community, Beusan works as a volunteer instructor for the Columbia Health Department teaching basic banking skills to the local Latin community.

About Commerce Bank

Commerce Bank, N.A. is a subsidiary of Commerce Bancshares, Inc. (NASDAQ: CBSH), a $17.5 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†