Frost Bank is a subsidiary of Cullen/Frost Bankers, Inc., a financial holding company, headquartered in San Antonio, Texas. The company provides a wide range of banking, investments, and insurance services to businesses and individuals in Texas. Frost Bank has over 130 branches across Texas and offers online banking services to its customers. The bank was founded in 1868 by Thomas Claiborne Frost and has been serving Texans for over 150 years.