International Bancshares (IBOC) is a bank holding company headquartered in Laredo, Texas, operating five subsidiary banks across Texas and Oklahoma. IBOC's core business is commercial and retail banking — taking deposits and making loans to businesses and individuals. IBOC operates 166 facilities and 247 ATMs across 75 communities, selling banking services through traditional branch networks, retail locations in shopping malls, and online and mobile banking. IBOC's primary customers are small- and mid-sized businesses, though the banks have expanded into consumer banking and mortgage lending. A distinctive feature of IBOC's franchise is its deep integration into the U.S.-Mexico border economy: roughly 32% of total deposits come from individuals and businesses domiciled in Mexico, and IBOC actively facilitates cross-border commerce through letters of credit, commercial loans, and foreign exchange services. IBOC earns money primarily through net interest income — the spread between what it earns on loans and investments and what it pays on deposits. The large base of Mexican-domiciled deposits is a key differentiator, providing low-cost, stable funding. Beyond interest income, IBOC earns fees from letters of credit, foreign exchange, credit cards, and escrow services. IBOC also holds a 50% interest in Gulfstar Group, an investment banking firm, though this is secondary to the core banking business. IBOC runs a heavily capitalized balance sheet, reflecting a conservative approach to capital management.