Related Party Transactions and Outside Related Director Information

Cass Information Systems, Inc. (CASS)

3/16/2006 Proxy Information

Some of the directors and executive officers of the Company, and members of their immediate families and firms and corporations with which they are associated, have had transactions with the Company's subsidiary bank, including borrowings and investments in depository accounts. All such loans and investments have been made in the ordinary course of business, and on substantially the same terms, including interest rates charged or paid and collateral required, as those prevailing at the same time for comparable transactions with unaffiliated persons, and did not involve more than the normal risk of collectibility or present other unfavorable features. As of December 31, 2005, the aggregate indebtedness to officers and directors of the Company and to firms and corporations in which they have at least a 10% beneficial interest was approximately $4,042,292, which represents approximately 5% of the Company's consolidated shareholders' equity at that date.

Mr. Krieg served as the President of Cass Bank & Trust Company (presently known as Cass Commercial Bank, the banking subsidiary of Cass Information Systems, Inc.) from 1964 to 1969. He became Chief Executive Officer and Chairman of Cass Information Systems, Inc. in 1969 and 1974, respectively. He also served as Chief Executive Officer and Chairman of Cass Commercial Corporation (the predecessor name of Cass Information Systems, Inc.) until 1992.