<TABLE> <S> <C>

<PAGE>
<ARTICLE> 9
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
FINANCIAL STATEMENTS OF CITIZENS NATIONAL BANK OF TEXAS AT MARCH 31, 2000, AND
FOR THE THREE MONTHS THEN ENDED AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO
SUCH FINANCIAL STATEMENTS
</LEGEND>
<MULTIPLIER> 1,000

<S>                             <C>
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-2000
<PERIOD-START>                             JAN-01-2000
<PERIOD-END>                               MAR-31-2000
<CASH>                                          13,460
<INT-BEARING-DEPOSITS>                              58
<FED-FUNDS-SOLD>                                     0
<TRADING-ASSETS>                                     0
<INVESTMENTS-HELD-FOR-SALE>                    125,238
<INVESTMENTS-CARRYING>                         115,975
<INVESTMENTS-MARKET>                           110,398
<LOANS>                                        146,938
<ALLOWANCE>                                      1,423
<TOTAL-ASSETS>                                 417,013
<DEPOSITS>                                     348,811
<SHORT-TERM>                                    26,500
<LIABILITIES-OTHER>                              2,332
<LONG-TERM>                                      8,000
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                         5,086
<OTHER-SE>                                      26,284
<TOTAL-LIABILITIES-AND-EQUITY>                 417,013
<INTEREST-LOAN>                                  3,405
<INTEREST-INVEST>                                3,806
<INTEREST-OTHER>                                     0
<INTEREST-TOTAL>                                 7,211
<INTEREST-DEPOSIT>                               3,024
<INTEREST-EXPENSE>                               3,523
<INTEREST-INCOME-NET>                            3,688
<LOAN-LOSSES>                                      195
<SECURITIES-GAINS>                                   0
<EXPENSE-OTHER>                                  2,664
<INCOME-PRETAX>                                  1,535
<INCOME-PRE-EXTRAORDINARY>                       1,535
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     1,271
<EPS-BASIC>                                       0.26
<EPS-DILUTED>                                     0.26
<YIELD-ACTUAL>                                    7.39
<LOANS-NON>                                        208
<LOANS-PAST>                                       210
<LOANS-TROUBLED>                                    26
<LOANS-PROBLEM>                                    444
<ALLOWANCE-OPEN>                                 1,327
<CHARGE-OFFS>                                      144
<RECOVERIES>                                        45
<ALLOWANCE-CLOSE>                                1,200
<ALLOWANCE-DOMESTIC>                             1,423
<ALLOWANCE-FOREIGN>                                  0
<ALLOWANCE-UNALLOCATED>                              0


</TABLE>