THE CORPORATE LIBRARY

Related Party Transactions and Outside Related Director Information

Commerce Bancshares, Inc. (CBSH)

3/13/2006 Proxy Information

Mr. Jonathan Kemper is the brother of David W. Kemper.

Directors and officers of the Company and the nominees for directors and their associates have deposit accounts with the subsidiary banks of the Company, and some directors, nominees for directors and officers and their associates also have other transactions with the subsidiary banks, including loans in the ordinary course of business, all of which were made on substantially the same terms, including interest rates and collateral, as those prevailing at the time for comparable transactions with other persons, and did not involve more than normal risk of collectibility or present other unfavorable features. All such loans were made pursuant to 12 USC 375(b) and Regulation O promulgated thereunder. As of December 31, 2005, all such loans were current.

Messrs. David Kemper and Jonathan Kemper are directors of Tower Properties Company (Tower) and together with members of their immediate families own beneficially approximately 65% of the outstanding stock of Tower.

During 2005, subsidiaries of the Company paid Tower $508,749 for rentals, $103,878 for leasing fees, $97,690 for operation of parking garages, $1,431,682 for building management fees, $2,503,265 for other property construction and repair costs and $206,617 for interest paid on deposits with the CompanyÕs principal banking subsidiary.

3/11/2005 Proxy Information

Mr. Jonathan Kemper is the brother of David W. Kemper.

Directors and officers of the Company and the nominees for directors and their associates have deposit accounts with the subsidiary banks of the Company, and some directors, nominees for directors and officers and their associates also have other transactions with the subsidiary banks, including loans in the ordinary course of business, all of which were made on substantially the same terms, including interest rates and collateral, as those prevailing at the time for comparable transactions with other persons, and did not involve more than normal risk of collectibility or present other unfavorable features. All such loans were made pursuant to 12 USC 375(b) and Regulation O promulgated thereunder. As of December 31, 2004, all such loans were current.

Messrs. David Kemper and Jonathan Kemper are directors of Tower Properties Company (Tower) and together with members of their immediate families own beneficially approximately 66% of the outstanding stock of Tower.

During 2004, subsidiaries of the Company paid Tower $1,412,775 for rentals, $92,542 for leasing fees, $46,461 for operation of parking garages, $1,314,971 for building management fees, $2,472,905 for other property construction and repair costs and $127,364 for interest paid on deposits with the CompanyÕs principal banking subsidiary.

On December 22, 2004, Commerce Bank, N.A., a subsidiary of the Company, entered into an agreement with Tower to purchase a multi-story office building and garage in downtown Kansas City for $10,750,000. On December 29, 2004, Commerce Bank, N.A., a subsidiary of the Company, entered into an agreement with Tower to purchase a multi-story garage in downtown Kansas City, adjoining the office building and garage previously mentioned, for $7,250,000. The purpose of the purchases is to provide suitable office space and parking relating to the relocation of the bankÕs back-office check and deposit operations. Tower had previously owned the multi-story office building and garage for more than ten years as well as the land for the multi-story garage. The multi-story garage building, however, was newly constructed and placed into service in December 2003. TowerÕs cost of construction of the multi-story garage building was $7,403,000 while the underlying land had a cost of $584,000. On February 28, 2005, the first phase of the transaction was completed and resulted in the acquisition of the building, which has 215,000 square feet of rentable area, and an incorporated parking garage beneath the building. Approximately thirty days following that date, the purchase of the adjoining parking garage is scheduled to close. The Board of Directors and Audit Committee of the Company approved the purchase with Messrs. David W. Kemper and Jonathan M. Kemper abstaining from the vote. The Board of Directors and Audit Committee considered an independent appraisal by Integra Realty Resources of Kansas City, Missouri and an independent search for comparable alternative space within a reasonable proximity to the purchased property.

3/12/2004 Proxy Information

Mr. David Kemper is the brother of Jonathan M. Kemper.

During 2003, subsidiaries of the Company paid Tower Properties Company $1,815,429 in rentals, $559,655 in leasing fees, $43,257 for operation of parking garages, $1,231,999 for building management fees, $1,527,567 for other property construction and repair costs and $102,752 for interest paid on deposits with the CompanyÕs principal banking subsidiary. Messrs. David Kemper and Jonathan Kemper are directors of Tower Properties Company and together with members of their immediate families own beneficially approximately 46% of the outstanding stock of Tower Properties Company.

3/12/2003 Proxy Information

During 2002, subsidiaries of the Company paid Tower Properties Company $1,488,865 in rentals, $19,410 in leasing fees, $38,119 for operation of parking garages, $1,129,320 for building management fees, and $2,652,294 for other property construction and repair costs. Messrs. David Kemper and Jonathan Kemper are directors of Tower Properties Company and together with members of their immediate families own beneficially approximately 48% of the outstanding stock of Tower Properties Company.

Mr. David Kemper is the brother of Jonathan M. Kemper.