Banc of California to Acquire Pacific Mercantile Bancorp

Banc of California and PacWest Bancorp to Combine in All-Stock Merger with $400M Investment from Warburg Pincus and Centerbridge

July 25, 2023

Financial Services

Banc of California and PacWest Bancorp have signed a definitive agreement to combine in an all‑stock merger under which PacWest will merge into Banc of California. Concurrent with closing, affiliates of Warburg Pincus and Centerbridge will invest $400 million of newly issued equity to support balance‑sheet repositioning and scale the combined California-focused business bank.

Columbia Banking System to Acquire Pacific Premier Bancorp

September 2, 2025

Financial Services

Columbia Banking System, Inc. (Columbia) entered into a definitive all-stock merger agreement to acquire Pacific Premier Bancorp, Inc. Columbia will receive Pacific Premier in a stock-for-stock exchange (0.9150 Columbia shares for each Pacific Premier share). The transaction received required regulatory approvals and was later reported as closed as of August 31, 2025.

BayCom Corp Acquires Pacific Enterprise Bancorp

February 1, 2022

Financial Services

BayCom Corp signed an agreement to acquire Pacific Enterprise Bancorp in an all-stock transaction valued at approximately $53.1 million. BayCom completed the acquisition effective February 1, 2022, expanding its presence in Orange County, California and its SBA/government-guaranteed lending resources.

PCB Financial Acquires Northern California Bancorp and Monterey County Bank

September 5, 2024

Financial Services

PCB Financial, Inc. has completed a merger to acquire Northern California Bancorp, Inc. and its wholly owned subsidiary Monterey County Bank; the bank will become a privately held subsidiary of PCB. The transaction is intended to infuse capital and expand lending and treasury products to better serve local small and medium-sized businesses in Monterey County.

BMO Financial Group to Acquire Bank of the West for $16.3 Billion

December 20, 2021

Financial Services

BMO Financial Group, together with its subsidiary BMO Harris Bank N.A., signed a definitive agreement to purchase Bank of the West and its subsidiaries from BNP Paribas. The $16.3 billion cash deal is expected to close by the end of calendar 2022, subject to customary regulatory approvals, and will expand BMO’s U.S. presence—especially in California.

Southern California Bancorp Acquires Bank of Santa Clarita

October 1, 2021

Financial Services

Southern California Bancorp completed the previously announced merger with Bank of Santa Clarita, combining the community bank into its wholly owned subsidiary Bank of Southern California, N.A. The deal expands Southern California Bancorp's commercial banking footprint into the Santa Clarita Valley and creates a combined bank with approximately $2.2 billion in pro forma assets.