| Name of Subsidiary | State or Other Jurisdiction of Incorporation or Organization | Percentage of Voting Securities Owned by Cullen/Frost Bankers, Inc. | |||||||||
| Cullen/Frost Capital Trust II | Delaware | 100% | |||||||||
| Main Plaza Corporation | Texas | 100% | |||||||||
| Frost Capital Markets, Inc. | Texas | 100% | |||||||||
| Frost Bank | Texas | 100% | |||||||||
| Frost Insurance Agency, Inc. | Texas | 100% | |||||||||
| Frost Brokerage Services, Inc. | Texas | 100% | |||||||||
| Frost Investment Advisors, LLC | Texas | 100% | |||||||||
| Frost Investment Services, LLC | Texas | 100% | |||||||||
| Tri-Frost Corporation | Texas | 100% | |||||||||
| Carton Service Corporation | Texas | 100% | |||||||||