California Bank & Trust, one of the leading banks in California, is a subsidiary of Zions Bancorporation. Formed in 1998, it offers services in three categories: personal, commercial and small business banking. California Bank & Trust is the result of merging three institutions acquired separately by Zions Bancorporation: Sumitomo Bank of California, San Diego-based Grossmont Bank and First Pacific National Bank. Greenwich Associates, one of the leading global financial services research and consulting firms, has awarded California Bank & Trust 14 Excellence Awards for small business and middle market banking.