Plains Acquisition Corporation operates as a bank holding company for Plains State Bank that provides banking products and services for individual and business customers in Texas. It offers checking, savings, business, and money markets accounts; new and used auto, home improvement, and other consumer related loans; treasury management services; and online and mobile banking services. The company also provides business loans, including startups, business acquisitions, commercial real estate, commercial building construction, expansion/modernization, leasehold improvement, inventory, equipment-machinery purchase, refinancing, business debt consolidation, working capital, and lines of credit loans. The company was founded in 1957 and is based in Humble, Texas.