First Regional Bancorp operates as a holding company, which provides financial services. It operates in three segments: Core Bank Operations, Trust Administrative Services and Trust Services. The Core Bank Operations segment engages in the accepting funds from the general public and originating commercial and real estate loans for small and midsize businesses in Southern California. The Trust Administrative Services segment provides administrative services for self-directed retirement plans. The Trust Services segment engages in the providing of trust services for living trusts, investment agency accounts, IRA rollovers, and all forms of court-related matters. The company was founded on February 18, 1981 and is headquartered in Los Angeles, U.S.