California Bank & Trust is a multifaceted and diverse banking and investment services company and is a subsidiary of Zions Bancorporation. California Bank & Trust is one of the largest California-based banks with approximately 10 billion in asset and has over 90 branch offices throughout the United States. The company operates as a combination of various financial institutions that include Antelope Valley Bank, Regency Bank, Grossmont Bank and Commerce Security Bank. It offers products, resources and financing solutions for various businesses and individuals. California Bank & Trust provides wealth consultation, Internet banking, cash management, international banking, and commercial and small business lending services. The company maintains an office in Laguna Hills, Calif.