IBC Banks Rio Grande Walmart In-store Branch is a member of International Bancshares Corporation (NASDAQ: IBOC), a more than $11.8 billion multi-bank financial holding company headquartered in Laredo, Texas, with over 185 facilities, more than 285 ATMs serving about 89 communities in Texas and Oklahoma. In 2016, IBC celebrated its 50th anniversary since opening its doors for business in 1966. IBC Banks slogan We Do More reflects the banks dedication to the growth and success of both the customers and the communities it serves. International Bancshares was ranked 22nd on Forbes prestigious list of 100 Best Banks in America in 2019. IBC Bank Zapata has been serving the Brush Country area since 1984 and has a retail branch network of 10 locations.