American Business Bank (OTCMKTS:AMBZ) (OTCMKTS:AMBZ) is a California-based commercial bank founded in 2006 and headquartered in Irvine. As a subsidiary of American Business Bancorp, Inc., the institution focuses on serving small to mid-sized businesses through a full suite of banking and lending solutions. Its client base spans a variety of industries, including commercial real estate, manufacturing, professional services, and technology, reflecting a commitment to supporting the diverse needs of growing companies.
The bank’s core activities include commercial real estate lending for owner-occupied and investment properties, equipment financing, business term loans, revolving lines of credit, and government-backed SBA and USDA offerings. Complementing its lending capabilities, American Business Bank provides treasury management services such as online cash management, automated clearinghouse (ACH) transactions, wire transfers, merchant services, and controlled disbursement. Deposit products range from business checking and savings accounts to money market instruments, designed to optimize working capital for corporate clients.
Primarily serving Southern California, the bank maintains a network of branches across Orange County, Los Angeles, the Inland Empire, San Diego, and Santa Barbara. With local decision-making authority and a deep understanding of regional market dynamics, American Business Bank aims to deliver timely credit approvals and customized service. Its geographical footprint enables close client relationships and rapid responsiveness to business challenges.
The leadership team is spearheaded by founder and Chief Executive Officer Stephen A. Mustari, supported by seasoned professionals in commercial banking, credit administration, and risk management. Under their guidance, the bank emphasizes personalized service, careful risk assessment, and strategic growth. American Business Bank continues to leverage its middle-market expertise to provide tailored financial solutions that foster business development and long-term client success.
