Plains Acquisition Corporation operates as a bank holding company for Plains State Bank that provides banking products and services for individual and small and medium-sized businesses in the United States. The company offers checking, savings, business, and money markets accounts; certificate of deposit; consumer and business credit cards; business term, SBA, commercial real estate, equipment, and other consumer related loans; treasury management services; and online and mobile banking services. Plains Acquisition Corporation was founded in 1957 and is headquartered in Humble, Texas.