SAN DIEGO, Calif. /ScoopCloud/ -- Bank of Southern California, N.A. (OTC Pink: BCAL) and CalWest Bancorp (OTCBB: CALW), today announced the signing of a definitive agreement and plan of merger (the "Agreement") whereby CalWest Bank will merge with and into Bank of Southern California. The merger is subject to customary closing conditions, including the receipt of all regulatory approvals and the approval of the shareholders of CALW and BCAL.