EX-21 4 iboc-20251231xex21.htm EX-21

Exhibit 21

List of Subsidiaries

Subsidiaries of International Bancshares Corporation

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Name | ​ ​ ​ | State of Incorporation or Organization | ​ ​ ​ | Business | ​ ​ ​ | % of Ownership |
IBC Trading Company | ​ | Texas | ​ | Export Trading | ​ | 100 | %
IBC Capital Corporation | ​ | Delaware | ​ | Investments | ​ | 100 | %
IBC Charitable and Community Development Corporation | ​ | Texas | ​ | Community Development | ​ | 100 | %
Premier Tierra Holdings, Inc. | ​ | Texas | ​ | Liquidating Subsidiary | ​ | 100 | %
International Bank of Commerce | ​ | Texas | ​ | State Bank | ​ | 100 | %
Commerce Bank | ​ | Texas | ​ | State Bank | ​ | 100 | %
International Bank of Commerce, Zapata | ​ | Texas | ​ | State Bank | ​ | 100 | %
International Bank of Commerce, Brownsville | ​ | Texas | ​ | State Bank | ​ | 100 | %
International Bank of Commerce, Oklahoma | ​ | Oklahoma | ​ | State Bank | ​ | 100 | %
WCMH, LLC | ​ | Texas | ​ | Merchant Banking | ​ | 100 | %
Diamond Beach Holdings, LLC | ​ | Texas | ​ | Merchant Banking | ​ | 100 | %
Gulfstar Merchant Banking I, Ltd. | ​ | Texas | ​ | Merchant Banking | ​ | 70 | %
Gulfstar Merchant Banking II, Ltd. | ​ | Texas | ​ | Merchant Banking | ​ | 70 | %
Gulfstar Merchant Banking III, Ltd. | ​ | Texas | ​ | Merchant Banking | ​ | 50 | %
Gulfstar Merchant Banking IV, Ltd. | ​ | Texas | ​ | Merchant Banking | ​ | 50 | %
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