Pacific Mercantile Bank, operating under parent holding company Pacific Mercantile Bancorp, provided commercial banking and customized financing services to regional businesses. The financial institution offered commercial lending, treasury management, and specialized debt facilities for middle-market enterprises.

In October 2021, Banc of California completed an all-stock acquisition of the bank for approximately $235 million. Following the completion of the merger, the institution was fully integrated into Banc of California, National Association.