Western Alliance Bancorporation operates as the bank holding company for Western Alliance Bank that provides various banking products and related services primarily in Arizona, California, and Nevada. It operates through Commercial and Consumer Related segments. The company offers deposit products, including checking, savings, and money market accounts, as well as fixed-rate and fixed maturity certificates of deposit accounts; demand deposits; and treasury management and residential mortgage products and services. It also provides commercial and industrial loan products, such as working capital lines of credit, loans to technology companies, inventory and accounts receivable lines, mortgage warehouse lines, equipment loans and leases, and other commercial loans; commercial real estate loans, which are secured by multi-family residential properties, professional offices, industrial facilities, retail centers, hotels, and other commercial properties; construction and land development loans for single family and multi-family residential projects, industrial/warehouse properties, office buildings, retail centers, medical office facilities, and residential lot developments; and consumer loans. In addition, the company provides other financial services, such as internet banking, wire transfers, electronic bill payment and presentment, funds transfer and other digital payment offerings, lock box services, courier, and cash management services. Further, the company holds certain investment securities, municipal and non-profit loans, and leases; invests primarily in low-income housing tax credits and small business investment corporations; and holds certain real estate loans and related securities. Western Alliance Bancorporation was founded in 1994 and is headquartered in Phoenix, Arizona.

Westamerica Bancorporation operates as a bank holding company for the Westamerica Bank that provides various banking products and services to individual and commercial customers. The company accepts various deposit products, including retail savings and checking accounts, as well as certificates of deposit. Its loan portfolio includes commercial, commercial and residential real estate, real estate construction, and consumer installment loans, as well as indirect automobile loans. The company was formerly known as Independent Bankshares Corporation and changed its name to Westamerica Bancorporation in 1983. The company was founded in 1884 and is headquartered in San Rafael, California.

California BanCorp. operates as the bank holding company for California Bank of Commerce, N.A. that provides various financial products to individuals, professionals, and small- to medium-sized businesses in California. The company offers checking, personal and business savings, and money market accounts, as well as certificates of deposit. It also provides home equity lines of credit, business loans and lines of credit, commercial real estate and construction loans, small business administration loans, letters of credit, and personal and business credit cards. In addition, the company provides cash vault, sweep accounts, and remote deposit capture services; online and mobile banking services; courier service; lockbox services; and merchant services. The company was formerly known as Southern California Bancorp and changed its name to California BanCorp. in August 2024. California BanCorp. was founded in 2001 and is headquartered in San Diego, California.

BayCom Corp operates as the bank holding company for United Business Bank that provides various financial services to small and mid-sized businesses, service professionals, and individuals. The company provides demand, savings, money market, and time deposit accounts. It offers commercial and multifamily real estate loans, including owner-occupied and investor real estate loans; commercial and industrial loans, such as equipment loans and working capital lines of credit; small business administration loans; construction and land loans; agriculture-related loans; and consumer loans comprising installment loans, unsecured and secured personal lines of credit, and overdraft protection. In addition, the company provides online and mobile banking, automated teller machine, remote deposit capture, night depository, courier, direct deposit, treasury management, wire transfer, automated clearing house, debit cards, cashier's and travelers checks, letters of credit, lockbox, positive pay, reverse positive pay, and account reconciliation services, as well as zero balance accounts and sweep accounts, including loan sweep. It operates through a network of full-service banking branches in Northern and Southern California; Las Vegas, Nevada; Denver, Colorado; Custer, Delta, and Grand counties, Colorado; and Seattle, Washington and Central New Mexico. The company was formerly known as Bay Commercial Bank and changed its name to BayCom Corp in January 2017. BayCom Corp was incorporated in 2004 and is headquartered in Walnut Creek, California.

Oak Valley Bancorp operates as the bank holding company for Oak Valley Community Bank that provides a range of commercial banking services to individuals and small to medium-sized businesses in the Central Valley and the Eastern Sierras. The company's deposits products include checking and savings, money market, health savings, and individual retirement accounts, as well as certificates of deposit. It also offers commercial real estate loans, commercial business lending and trade finance, and small business administration lending, as well as consumer loans, including automobile loans, home mortgages, credit lines, and other personal loans. In addition, the company provides online and mobile banking, remote deposit capture, merchant, night depository, extended hours, wire transfer of funds, note collection services, and automated teller machines. The company was incorporated in 1990 and is headquartered in Oakdale, California.

Western New England Bancorp, Inc. operates as the holding company for Westfield Bank that provides a range of commercial and retail banking products and services to individuals and businesses. The company accepts various deposit accounts, including interest-bearing and noninterest-bearing checking, commercial checking, business, nonprofit and municipal checking, savings, money market and sweep, individual retirement, and other savings accounts; time deposits; certificates of deposit; and interest on lawyer's trust accounts. It also offers residential real estate loans, including first mortgages, home equity loans, and home equity lines, and secured by one-to-four family residential properties; commercial and industrial loans, such as letters of credit, revolving lines of credit, working capital, equipment financing, and term loans; commercial mortgage loans; construction and land development loans; home equity loans comprising home equity revolving loans and lines of credit; and consumer loans, including automobile, spa and pool, collateral, and personal lines of credit. In addition, the company provides automated teller machine (ATM), telephone and online banking, remote deposit capture, cash management, overdraft and safe deposit facility, and night deposit services. The company was formerly known as Westfield Financial, Inc. and changed its name to Western New England Bancorp, Inc. in October 2016. The company was founded in 1853 and is headquartered in Westfield, Massachusetts.

United Security Bancshares operates as the bank holding company for United Security Bank, a state-chartered bank that provides a range of commercial banking services to the business and professional community, and individuals in California. The company accepts various deposit products, including personal and business checking accounts, savings accounts, interest-bearing negotiable order of withdrawal accounts, money market accounts, and time certificates of deposit. It also provides real estate mortgage, commercial and industrial, real estate construction and development, and consumer loans, as well as agricultural, installment, and student loans. In addition, the company offers online and mobile banking, safe deposit boxes, wire transfers, payroll direct deposit, cashier's check, cash management, and foreign draft services, as well as interactive teller machines; and person-to-person and bank-to-bank transfers for consumer customers. United Security Bancshares was founded in 1987 and is headquartered in Fresno, California.

Central Valley Community Bancorp operates as the bank holding company for the Central Valley Community Bank that provides various commercial banking services to small and middle-market businesses and individuals in the central valley area of California. The company accepts demand, savings, and time deposits; certificates of deposit; and non-interest-bearing demand deposits, as well as provides NOW and money market accounts. It also provides products, such as commercial and industrial loans, as well as loans secured by crop production and livestock; owner occupied and investor commercial real estate, real estate construction and other land, agricultural real estate, and other real estate loans; and equity loans and lines of credit, and installment and other consumer loans. In addition, the company offers domestic and international wire transfer, inquiry, account status, bill paying, account transfers, and cash management and other customary banking services. Central Valley Community Bancorp was founded in 1979 and is based in Fresno, California.