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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549





FORM 10-Q





(Mark One)

|x |  | QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
|- |  | ---------------------------------------------------------------------------------------

FOR THE QUARTERLY PERIOD ENDED SEPTEMBER 30, 2008

OR



| ̈ |  | TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
|- |  | ----------------------------------------------------------------------------------------

FOR THE TRANSITION PERIOD FROM              TO

COMMISSION FILE NUMBER: 000-25051

PROSPERITY BANCSHARES, INC.®

(Exact name of registrant as
specified in its charter)



|                                                               |  |                                     
|-------------------------------------------------------------- |  | ------------------------------------
|TEXAS                                                          |  | 74-2331986                          
|(State or other jurisdiction of incorporation or organization) |  | (I.R.S. Employer Identification No.)

Prosperity Bank Plaza

4295 San Felipe

Houston, Texas 77027

(Address of principal executive offices, including zip code)

(713) 693-9300

(Registrants telephone number, including area code)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934
during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  x    No   ̈

Indicate by check mark whether the registrant is
a large accelerated filer, an accelerated filer, a non-accelerated filer or a smaller reporting company. See definitions of accelerated filer, large accelerated filer and smaller reporting company in Rule 12b-2 of
the Exchange Act:



| |  |                            |  |                      |  |                                               |  |                              |  | 
| |  | -------------------------- |  | -------------------- |  | --------------------------------------------- |  | ---------------------------- |  | 
| |  | Large Accelerated Filer  x |  | Accelerated Filer   ̈ |  | Non-accelerated Filer   ̈                      |  | Smaller Reporting Company   ̈ |  | 
| |  |                            |  |                      |  | (Do not check if a smaller reporting company) |  |                              |  | 

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange
Act).    Yes   ̈    No  x

As of November 1, 2008, there were outstanding 46,077,613 shares of the registrants Common Stock, par value $1.00 per share.









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##### Table of Contents

PROSPERITY
BANCSHARES, INC.® AND SUBSIDIARIES

INDEX TO FORM 10-Q



|                               |  |                                                                                                                                                                                     |  |   
|------------------------------ |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |  | --
|PART I - FINANCIAL INFORMATION |  | Page                                                                                                                                                                               
|                               |  |                                                                                                                                                                                    
|Item 1.                        |  | Financial Statements                                                                                                                                                                |  | 3 
|                               |  | Condensed Consolidated Balance Sheets as of September 30, 2008 (unaudited) and December 31, 2007
(unaudited)                                                                        |  | 3 
|                               |  | Condensed Consolidated Statements of Income for the Three and Nine Months Ended September 
30, 2008 and 2007 (unaudited)                                                            |  | 4 
|                               |  | Condensed Consolidated Statements of Changes in Shareholders Equity for the Year Ended December 
31, 2007 (unaudited) and for the Nine Months Ended September 30, 2008 (unaudited) |  | 5 
|                               |  | Condensed Consolidated Statements of Cash Flows for the Nine Months Ended September 30, 2008 and 2007
(unaudited)                                                                   |  | 6 
|                               |  | Notes to Interim Condensed Consolidated Financial Statements (unaudited)                                                                                                            |  | 8 
|Item 2.                        |  | Managements Discussion and Analysis of Financial Condition and Results of Operations                                                                                               |  | 16
|Item 3.                        |  | Quantitative and Qualitative Disclosures about Market Risk                                                                                                                          |  | 32
|Item 4.                        |  | Controls and Procedures                                                                                                                                                             |  | 32
|                               | 
|PART II - OTHER INFORMATION    |  |                                                                                                                                                                                    
|                               |  |                                                                                                                                                                                    
|Item 1.                        |  | Legal Proceedings                                                                                                                                                                   |  | 32
|Item 1A.                       |  | Risk Factors                                                                                                                                                                        |  | 32
|Item 2.                        |  | Unregistered Sales of Equity Securities and Use of Proceeds                                                                                                                         |  | 33
|Item 3.                        |  | Defaults upon Senior Securities                                                                                                                                                     |  | 33
|Item 4.                        |  | Submission of Matters to a Vote of Security Holders                                                                                                                                 |  | 33
|Item 5.                        |  | Other Information                                                                                                                                                                   |  | 33
|Item 6.                        |  | Exhibits                                                                                                                                                                            |  | 33
|Signatures                     |  | 35                                                                                                                                                                                 



2



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##### Table of Contents

PART I  FINANCIAL INFORMATION

ITEM 1. FINANCIAL STATEMENTS

PROSPERITY BANCSHARES, INC®. AND SUBSIDIARIES

CONDENSED CONSOLIDATED BALANCE SHEETS

(UNAUDITED)



|                                                                                                                                                                                                                                                                     |  |                                   |           |   |                  |   |           |  
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |  | --------------------------------- | --------- | - | ---------------- | - | --------- | -
|                                                                                                                                                                                                                                                                     |  | September 30,2008                 |           |   | December 31,2007 |  
|                                                                                                                                                                                                                                                                     |  | (In thousands, except share data) |          
|ASSETS                                                                                                                                                                                                                                                               |  |                                   |           |   |                  |   |           |  
|Cash and due from banks                                                                                                                                                                                                                                              |  | $                                 | 159,386   |   |                  | $ | 178,247   |  
|Federal funds sold                                                                                                                                                                                                                                                   |  |                                   | 25,544    |   |                  |   | 192,843   |  
|                                                                                                                                                                                                                                                                     |  |                                   |           |   |                  |   |           |  
|Total cash and cash equivalents                                                                                                                                                                                                                                      |  |                                   | 184,930   |   |                  |   | 371,090   |  
|Interest bearing deposits in financial institutions                                                                                                                                                                                                                  |  |                                   | 204       |   |                  |   | 200       |  
|Securities available for sale, at fair value (amortized cost of $228,057 and $258,264, respectively)                                                                                                                                                                 |  |                                   | 229,278   |   |                  |   | 260,444   |  
|Securities held to maturity, at cost (fair value of $2,084,632 and $1,597,598 ,respectively)                                                                                                                                                                         |  |                                   | 2,065,125 |   |                  |   | 1,597,162 |  
|Loans held for investment                                                                                                                                                                                                                                            |  |                                   | 3,248,518 |   |                  |   | 3,132,025 |  
|Loans held for sale                                                                                                                                                                                                                                                  |  |                                   | 99        |   |                  |   | 10,946    |  
|Allowance for credit losses                                                                                                                                                                                                                                          |  |                                   | (33,981   | ) |                  |   | (32,543   | )
|                                                                                                                                                                                                                                                                     |  |                                   |           |   |                  |   |           |  
|Loans, net                                                                                                                                                                                                                                                           |  |                                   | 3,214,636 |   |                  |   | 3,110,428 |  
|Accrued interest receivable                                                                                                                                                                                                                                          |  |                                   | 25,214    |   |                  |   | 27,940    |  
|Goodwill                                                                                                                                                                                                                                                             |  |                                   | 811,916   |   |                  |   | 753,909   |  
|Core deposit intangibles, net of accumulated amortization of $29,003 and $21,490, respectively                                                                                                                                                                       |  |                                   | 44,974    |   |                  |   | 46,069    |  
|Bank premises and equipment, net                                                                                                                                                                                                                                     |  |                                   | 123,823   |   |                  |   | 120,044   |  
|Other real estate owned                                                                                                                                                                                                                                              |  |                                   | 7,538     |   |                  |   | 10,207    |  
|Bank Owned Life Insurance (BOLI)                                                                                                                                                                                                                                     |  |                                   | 46,751    |   |                  |   | 45,486    |  
|Federal Home Loan Bank stock                                                                                                                                                                                                                                         |  |                                   | 16,701    |   |                  |   | 5,558     |  
|Leased assets                                                                                                                                                                                                                                                        |  |                                   | 2,362     |   |                  |   | 3,559     |  
|Other assets                                                                                                                                                                                                                                                         |  |                                   | 14,457    |   |                  |   | 20,247    |  
|                                                                                                                                                                                                                                                                     |  |                                   |           |   |                  |   |           |  
|TOTAL ASSETS                                                                                                                                                                                                                                                         |  | $                                 | 6,787,909 |   |                  | $ | 6,372,343 |  
|                                                                                                                                                                                                                                                                     |  |                                   |           |   |                  |   |           |  
|LIABILITIES AND SHAREHOLDERS EQUITY                                                                                                                                                                                                                                 |  |                                   |           |   |                  |   |           |  
|LIABILITIES:                                                                                                                                                                                                                                                         |  |                                   |           |   |                  |   |           |  
|Deposits:                                                                                                                                                                                                                                                            |  |                                   |           |   |                  |   |           |  
|Noninterest-bearing                                                                                                                                                                                                                                                  |  | $                                 | 1,263,407 |   |                  | $ | 1,168,069 |  
|Interest-bearing                                                                                                                                                                                                                                                     |  |                                   | 3,841,435 |   |                  |   | 3,798,338 |  
|                                                                                                                                                                                                                                                                     |  |                                   |           |   |                  |   |           |  
|Total deposits                                                                                                                                                                                                                                                       |  |                                   | 5,104,842 |   |                  |   | 4,966,407 |  
|Other borrowings                                                                                                                                                                                                                                                     |  |                                   | 219,671   |   |                  |   | 31,466    |  
|Securities sold under repurchase agreements                                                                                                                                                                                                                          |  |                                   | 100,310   |   |                  |   | 84,581    |  
|Accrued interest payable                                                                                                                                                                                                                                             |  |                                   | 9,524     |   |                  |   | 11,761    |  
|Other liabilities                                                                                                                                                                                                                                                    |  |                                   | 32,117    |   |                  |   | 37,812    |  
|Junior subordinated debentures                                                                                                                                                                                                                                       |  |                                   | 92,265    |   |                  |   | 112,885   |  
|                                                                                                                                                                                                                                                                     |  |                                   |           |   |                  |   |           |  
|Total liabilities                                                                                                                                                                                                                                                    |  |                                   | 5,558,729 |   |                  |   | 5,244,912 |  
|                                                                                                                                                                                                                                                                     |  |                                   |           |   |                  |   |           |  
|COMMITMENTS AND CONTINGENCIES                                                                                                                                                                                                                                        |  |                                   |          |   |                  |   |          |  
|SHAREHOLDERS EQUITY:                                                                                                                                                                                                                                                |  |                                   |           |   |                  |   |           |  
|Preferred stock, $1 par value; 20,000,000 shares authorized; none issued or outstanding                                                                                                                                                                              |  |                                   |          |   |                  |   |          |  
|Common stock, $1 par value; 200,000,000 shares authorized; 46,109,126 and 44,188,323 shares issued at September 30, 2008 and
December 31, 2007, respectively; 46,072,038 and 44,151,235 shares outstanding at September 30, 2008 and December 31, 2007, respectively |  |                                   | 46,109    |   |                  |   | 44,188    |  
|Capital surplus                                                                                                                                                                                                                                                      |  |                                   | 866,871   |   |                  |   | 809,026   |  
|Retained earnings                                                                                                                                                                                                                                                    |  |                                   | 316,014   |   |                  |   | 273,407   |  
|Accumulated other comprehensive income  net unrealized gain on available for sale securities, net of tax of $427 and $763, respectively                                                                                                                             |  |                                   | 793       |   |                  |   | 1,417     |  
|Less treasury stock, at cost, 37,088 shares                                                                                                                                                                                                                          |  |                                   | (607      | ) |                  |   | (607      | )
|                                                                                                                                                                                                                                                                     |  |                                   |           |   |                  |   |           |  
|Total shareholders equity                                                                                                                                                                                                                                           |  |                                   | 1,229,180 |   |                  |   | 1,127,431 |  
|                                                                                                                                                                                                                                                                     |  |                                   |           |   |                  |   |           |  
|TOTAL LIABILITIES AND SHAREHOLDERS EQUITY                                                                                                                                                                                                                           |  | $                                 | 6,787,909 |   |                  | $ | 6,372,343 |  
|                                                                                                                                                                                                                                                                     |  |                                   |           |   |                  |   |           |  

See notes to interim condensed consolidated financial statements.



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PROSPERITY BANCSHARES,
INC.® AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF INCOME

(UNAUDITED)



|                                                      |  |                                               |        |                                |   |        |  |      |         |  |   |        
|----------------------------------------------------- |  | --------------------------------------------- | ------ | ------------------------------ | - | ------ |  | ---- | ------- |  | - | -------
|                                                      |  | Three Months EndedSeptember 30,               |        | Nine Months EndedSeptember 30,
|                                                      |  | 2008                                          |        | 2007                           |   | 2008   |  | 2007
|                                                      |  | (Dollars in thousands, except per share data)
|INTEREST INCOME:                                      |  |                                               |        |                                |   |        |  |      |         |  |   |        
|Loans, including fees                                 |  | $                                             | 56,925 |                                | $ | 64,036 |  | $    | 171,393 |  | $ | 185,919
|Securities:                                           |  |                                               |        |                                |   |        |  |      |         |  |   |        
|Taxable                                               |  |                                               | 26,871 |                                |   | 22,116 |  |      | 75,291  |  |   | 63,596 
|Nontaxable                                            |  |                                               | 913    |                                |   | 946    |  |      | 2,785   |  |   | 2,665  
|70% nontaxable preferred dividends                    |  |                                               | 50     |                                |   | 254    |  |      | 397     |  |   | 760    
|Federal funds sold                                    |  |                                               | 84     |                                |   | 648    |  |      | 1,418   |  |   | 2,216  
|Deposits in financial institutions                    |  |                                               | 3      |                                |   | 4      |  |      | 6       |  |   | 12     
|                                                      |  |                                               |        |                                |   |        |  |      |         |  |   |        
|Total interest income                                 |  |                                               | 84,846 |                                |   | 88,004 |  |      | 251,290 |  |   | 255,168
|                                                      |  |                                               |        |                                |   |        |  |      |         |  |   |        
|                                                      |  |                                               |        |                               
|INTEREST EXPENSE:                                     |  |                                               |        |                                |   |        |  |      |         |  |   |        
|Deposits                                              |  |                                               | 23,874 |                                |   | 31,794 |  |      | 78,029  |  |   | 92,328 
|Junior subordinated debentures                        |  |                                               | 1,410  |                                |   | 2,358  |  |      | 4,987   |  |   | 7,852  
|Federal funds purchased and other borrowings          |  |                                               | 1,125  |                                |   | 1,548  |  |      | 2,693   |  |   | 3,867  
|Securities sold under repurchase agreements           |  |                                               | 631    |                                |   | 935    |  |      | 1,809   |  |   | 2,319  
|                                                      |  |                                               |        |                                |   |        |  |      |         |  |   |        
|Total interest expense                                |  |                                               | 27,040 |                                |   | 36,635 |  |      | 87,518  |  |   | 106,366
|                                                      |  |                                               |        |                                |   |        |  |      |         |  |   |        
|                                                      |  |                                               |        |                               
|NET INTEREST INCOME                                   |  |                                               | 57,806 |                                |   | 51,369 |  |      | 163,772 |  |   | 148,802
|PROVISION FOR CREDIT LOSSES                           |  |                                               | 1,700  |                                |   | 75     |  |      | 3,867   |  |   | 640    
|                                                      |  |                                               |        |                                |   |        |  |      |         |  |   |        
|NET INTEREST INCOME AFTER PROVISION FOR CREDIT LOSSES |  |                                               | 56,106 |                                |   | 51,294 |  |      | 159,905 |  |   | 148,162
|                                                      |  |                                               |        |                                |   |        |  |      |         |  |   |        
|                                                      |  |                                               |        |                               
|NONINTEREST INCOME:                                   |  |                                               |        |                                |   |        |  |      |         |  |   |        
|Customer service fees                                 |  |                                               | 11,348 |                                |   | 10,785 |  |      | 32,581  |  |   | 29,908 
|Other                                                 |  |                                               | 1,769  |                                |   | 3,374  |  |      | 6,281   |  |   | 9,767  
|                                                      |  |                                               |        |                                |   |        |  |      |         |  |   |        
|Total noninterest income                              |  |                                               | 13,117 |                                |   | 14,159 |  |      | 38,862  |  |   | 39,675 
|                                                      |  |                                               |        |                                |   |        |  |      |         |  |   |        
|                                                      |  |                                               |        |                               
|NONINTEREST EXPENSE:                                  |  |                                               |        |                                |   |        |  |      |         |  |   |        
|Salaries and employee benefits                        |  |                                               | 17,526 |                                |   | 16,365 |  |      | 50,407  |  |   | 48,163 
|Net occupancy expense                                 |  |                                               | 3,088  |                                |   | 2,665  |  |      | 8,765   |  |   | 7,759  
|Data processing                                       |  |                                               | 1,319  |                                |   | 1,290  |  |      | 3,971   |  |   | 3,447  
|Core deposit intangible amortization                  |  |                                               | 2,562  |                                |   | 2,586  |  |      | 7,513   |  |   | 7,297  
|Depreciation expense                                  |  |                                               | 1,955  |                                |   | 1,895  |  |      | 5,812   |  |   | 5,656  
|Impairment write-down on securities                   |  |                                               | 14,025 |                                |   |       |  |      | 14,025  |  |   |       
|Other                                                 |  |                                               | 5,755  |                                |   | 5,286  |  |      | 15,717  |  |   | 15,108 
|                                                      |  |                                               |        |                                |   |        |  |      |         |  |   |        
|Total noninterest expense                             |  |                                               | 46,230 |                                |   | 30,087 |  |      | 106,210 |  |   | 87,430 
|                                                      |  |                                               |        |                                |   |        |  |      |         |  |   |        
|                                                      |  |                                               |        |                               
|INCOME BEFORE INCOME TAXES                            |  |                                               | 22,993 |                                |   | 35,366 |  |      | 92,557  |  |   | 100,407
|PROVISION FOR INCOME TAXES                            |  |                                               | 7,546  |                                |   | 11,518 |  |      | 30,735  |  |   | 33,336 
|                                                      |  |                                               |        |                                |   |        |  |      |         |  |   |        
|                                                      |  |                                               |        |                               
|NET INCOME                                            |  | $                                             | 15,447 |                                | $ | 23,848 |  | $    | 61,822  |  | $ | 67,071 
|                                                      |  |                                               |        |                                |   |        |  |      |         |  |   |        
|                                                      |  |                                               |        |                               
|EARNINGS PER SHARE                                    |  |                                               |        |                                |   |        |  |      |         |  |   |        
|Basic                                                 |  | $                                             | 0.34   |                                | $ | 0.54   |  | $    | 1.37    |  | $ | 1.58   
|                                                      |  |                                               |        |                                |   |        |  |      |         |  |   |        
|                                                      |  |                                               |        |                               
|Diluted                                               |  | $                                             | 0.33   |                                | $ | 0.54   |  | $    | 1.37    |  | $ | 1.56   
|                                                      |  |                                               |        |                                |   |        |  |      |         |  |   |        

See notes to interim condensed consolidated financial statements.



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PROSPERITY BANCSHARES,
INC.®AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF
CHANGES IN SHAREHOLDERS EQUITY

(UNAUDITED)



|                                                                                                 |  |                                                 |  |                |        |                  |   |         |                                            |   |         |               |  |   |                          |   |  |   |      |   |  |   |           |  
|------------------------------------------------------------------------------------------------ |  | ----------------------------------------------- |  | -------------- | ------ | ---------------- | - | ------- | ------------------------------------------ | - | ------- | ------------- |  | - | ------------------------ | - |  | - | ---- | - |  | - | --------- | -
|                                                                                                 |  | Common Stock                                    |  | CapitalSurplus |        | RetainedEarnings |   |         | AccumulatedOtherComprehensiveIncome
(Loss) |   |         | TreasuryStock |  |   | TotalShareholdersEquity |  
|                                                                                                 |  | Shares                                          |  | Amount         |        |                  |   |         |                                           
|                                                                                                 |  | (In thousands, except share and per share data) | 
|BALANCE AT JANUARY 1, 2007                                                                       |  | 32,829,873                                      |  | $              | 32,830 |                  | $ | 425,557 |                                            | $ | 209,581 |               |  | $ | (2,950                   | ) |  | $ | (607 | ) |  | $ | 664,411   |  
|Comprehensive Income:                                                                            |  |                                                 |  |                |        |                  |   |         |                                            |   |         |               |  |   |                          |   |  |   |      |   |  |   |           |  
|Net income                                                                                       |  |                                                 |  |                |        |                  |   |         |                                            |   | 84,151  |               |  |   |                          |   |  |   |      |   |  |   | 84,151    |  
|Net change in unrealized gain on available for sale securities.                                  |  |                                                 |  |                |        |                  |   |         |                                            |   |         |               |  |   | 4,367                    |   |  |   |      |   |  |   | 4,367     |  
|                                                                                                 |  |                                                 |  |                |        |                  |   |         |                                            |   |         |               |  |   |                          |   |  |   |      |   |  |   |           |  
|Total comprehensive income                                                                       |  |                                                 |  |                |        |                  |   |         |                                            |   |         |               |  |   |                          |   |  |   |      |   |  |   | 88,518    |  
|Common stock issued in connection with the exercise of stock options and restricted stock awards |  | 337,148                                         |  |                | 337    |                  |   | 3,148   |                                            |   |         |               |  |   |                          |   |  |   |      |   |  |   | 3,485     |  
|Common stock issued in connection with the TXUI acquisition                                      |  | 10,769,942                                      |  |                | 10,770 |                  |   | 370,116 |                                            |   |         |               |  |   |                          |   |  |   |      |   |  |   | 380,886   |  
|Common stock issued in connection with the Bank of Navasota acquisition                          |  | 251,360                                         |  |                | 251    |                  |   | 8,237   |                                            |   |         |               |  |   |                          |   |  |   |      |   |  |   | 8,488     |  
|Stock based compensation expense                                                                 |  |                                                 |  |                |        |                  |   | 1,968   |                                            |   |         |               |  |   |                          |   |  |   |      |   |  |   | 1,968     |  
|Cash dividends declared, $0.425 per share                                                        |  |                                                 |  |                |        |                  |   |         |                                            |   | (20,325 | )             |  |   |                          |   |  |   |      |   |  |   | (20,325   | )
|                                                                                                 |  |                                                 |  |                |        |                  |   |         |                                            |   |         |               |  |   |                          |   |  |   |      |   |  |   |           |  
|BALANCE AT DECEMBER 31, 2007                                                                     |  | 44,188,323                                      |  |                | 44,188 |                  |   | 809,026 |                                            |   | 273,407 |               |  |   | 1,417                    |   |  |   | (607 | ) |  |   | 1,127,431 |  
|Cumulative effectsplit dollar insurance adjustment                                              |  |                                                 |  |                |        |                  |   |         |                                            |   | (2,174  | )             |  |   |                          |   |  |   |      |   |  |   | (2,174    | )
|Comprehensive income:                                                                            |  |                                                 |  |                |        |                  |   |         |                                            |   |         |               |  |   |                          |   |  |   |      |   |  |   |           |  
|Net income                                                                                       |  |                                                 |  |                |        |                  |   |         |                                            |   | 61,822  |               |  |   |                          |   |  |   |      |   |  |   | 61,822    |  
|Net change in unrealized (loss) gain on available for sale securities                            |  |                                                 |  |                |        |                  |   |         |                                            |   |         |               |  |   | (624                     | ) |  |   |      |   |  |   | (624      | )
|                                                                                                 |  |                                                 |  |                |        |                  |   |         |                                            |   |         |               |  |   |                          |   |  |   |      |   |  |   |           |  
|Total comprehensive income                                                                       |  |                                                 |  |                |        |                  |   |         |                                            |   |         |               |  |   |                          |   |  |   |      |   |  |   | 61,198    |  
|Common stock issued in connection with the 1stChoice acquisition                                 |  | 1,757,752                                       |  |                | 1,758  |                  |   | 54,384  |                                            |   |         |               |  |   |                          |   |  |   |      |   |  |   | 56,142    |  
|Common stock issued in connection with the exercise of stock options and restricted stock awards |  | 163,051                                         |  |                | 163    |                  |   | 2,350   |                                            |   |         |               |  |   |                          |   |  |   |      |   |  |   | 2,513     |  
|Stock based compensation expense                                                                 |  |                                                 |  |                |        |                  |   | 1,111   |                                            |   |         |               |  |   |                          |   |  |   |      |   |  |   | 1,111     |  
|Cash dividends declared, $0.375 per share                                                        |  |                                                 |  |                |        |                  |   |         |                                            |   | (17,041 | )             |  |   |                          |   |  |   |      |   |  |   | (17,041   | )
|                                                                                                 |  |                                                 |  |                |        |                  |   |         |                                            |   |         |               |  |   |                          |   |  |   |      |   |  |   |           |  
|BALANCE AT SEPTEMBER 30, 2008                                                                    |  | 46,109,126                                      |  | $              | 46,109 |                  | $ | 866,871 |                                            | $ | 316,014 |               |  | $ | 793                      |   |  | $ | (607 | ) |  | $ | 1,229,180 |  
|                                                                                                 |  |                                                 |  |                |        |                  |   |         |                                            |   |         |               |  |   |                          |   |  |   |      |   |  |   |           |  

See notes to interim condensed consolidated financial statements.



5



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##### Table of Contents

PROSPERITY BANCSHARES,
INC.® AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(UNAUDITED)



|                                                                                    |  |                                |          |   |      |   |          |  
|----------------------------------------------------------------------------------- |  | ------------------------------ | -------- | - | ---- | - | -------- | -
|                                                                                    |  | Nine Months EndedSeptember 30, |         
|                                                                                    |  | 2008                           |          |   | 2007 |  
|                                                                                    |  | (Dollars in thousands)         |         
|CASH FLOWS FROM OPERATING ACTIVITIES:                                               |  |                                |          |   |      |   |          |  
|Net income                                                                          |  | $                              | 61,822   |   |      | $ | 67,071   |  
|Adjustments to reconcile net income to net cash provided by operating activities:   |  |                                |          |   |      |   |          |  
|Depreciation and amortization                                                       |  |                                | 13,325   |   |      |   | 12,953   |  
|Provision for credit losses                                                         |  |                                | 3,867    |   |      |   | 640      |  
|Net (accretion) amortization of discount/premium on investments                     |  |                                | (2,313   | ) |      |   | (6,120   | )
|Net amortization of loan and deposit premiums                                       |  |                                | (1,646   | ) |      |   |         |  
|Net loss (gain) on sale of other real estate                                        |  |                                | 648      |   |      |   | (552     | )
|Net gain on sale of securities                                                      |  |                                |         |   |      |   | (58      | )
|Net gain on sale of premises, equipment and other assets                            |  |                                | (715     | ) |      |   | (182     | )
|Net gain on held for sale loans                                                     |  |                                | (229     | ) |      |   | (1,202   | )
|Fundings of held for sale loans                                                     |  |                                |         |   |      |   | (49,466  | )
|Proceeds from held for sale loans                                                   |  |                                | 11,076   |   |      |   | 155,804  |  
|Stock-based compensation expense                                                    |  |                                | 1,111    |   |      |   | 1,491    |  
|Earnings on life insurance policies                                                 |  |                                | (1,265   | ) |      |   | (1,351   | )
|Impairment write-down of securities                                                 |  |                                | 14,025   |   |      |   |         |  
|Decrease in other assets and accrued interest receivable                            |  |                                | 278      |   |      |   | 14,581   |  
|(Decrease) increase in accrued interest payable and other liabilities               |  |                                | (4,989   | ) |      |   | 555      |  
|                                                                                    |  |                                |          |   |      |   |          |  
|Net cash provided by operating activities                                           |  |                                | 94,995   |   |      |   | 194,164  |  
|                                                                                    |  |                                |          |   |      |   |          |  
|CASH FLOWS FROM INVESTING ACTIVITIES:                                               |  |                                |          |   |      |   |          |  
|Proceeds from maturities and principal paydowns of held to maturity securities      |  |                                | 436,614  |   |      |   | 235,867  |  
|Purchase of held to maturity securities                                             |  |                                | (885,047 | ) |      |   | (382,154 | )
|Proceeds from maturities and principal paydowns of available for sale securities    |  |                                | 582,039  |   |      |   | 819,266  |  
|Proceeds from the sales of available for sale securities                            |  |                                |         |   |      |   | 349,224  |  
|Purchase of available for sale securities                                           |  |                                | (549,962 | ) |      |   | (960,992 | )
|Net decrease in loans                                                               |  |                                | 53,813   |   |      |   | 176,535  |  
|Purchase of bank premises and equipment                                             |  |                                | (6,222   | ) |      |   | (5,595   | )
|Net decrease in interest-bearing deposits in financial institutions                 |  |                                | 331      |   |      |   | 100      |  
|Proceeds from sale of bank premises, equipment, other real estate and other assets  |  |                                | 14,341   |   |      |   | 7,371    |  
|Purchase of Banco Popular branches                                                  |  |                                | (440     | ) |      |   |         |  
|Cash and cash equivalents acquired in the purchase of Banco Popular branches        |  |                                | 112,788  |   |      |   |         |  
|Purchase of 1stChoice
Bancorp                                                       |  |                                | (19,129  | ) |      |   |         |  
|Cash and cash equivalents acquired in the purchase of 1stChoice Bancorp             |  |                                | 84,240   |   |      |   |         |  
|Purchase of The Bank of Navasota                                                    |  |                                |         |   |      |   | (8,751   | )
|Cash and cash equivalents acquired in the purchase of The Bank of Navasota          |  |                                |         |   |      |   | 19,175   |  
|Purchase of Texas United Bancshares, Inc.                                           |  |                                | (74      | ) |      |   | (2,024   | )
|Cash and cash equivalents acquired in the purchase of Texas United Bancshares, Inc. |  |                                |         |   |      |   | 114,469  |  
|                                                                                    |  |                                |          |   |      |   |          |  
|Net cash (used in) provided by investing activities                                 |  |                                | (176,708 | ) |      |   | 362,491  |  
|                                                                                    |  |                                |          |   |      |   |          |  

(Table continued on following page)



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##### Table of Contents

PROSPERITY BANCSHARES, INC.® AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(UNAUDITED)



|                                                                                 |  |                                |          |   |      |   |          |  
|-------------------------------------------------------------------------------- |  | ------------------------------ | -------- | - | ---- | - | -------- | -
|                                                                                 |  | Nine Months EndedSeptember 30, |         
|                                                                                 |  | 2008                           |          |   | 2007 |  
|                                                                                 |  | (Dollars in thousands)         |         
|CASH FLOWS FROM FINANCING ACTIVITIES:                                            |  |                                |          |   |      |   |          |  
|Net increase (decrease) in noninterest-bearing deposits                          |  | $                              | 15       |   |      | $ | (81,218  | )
|Net decrease in interest-bearing deposits                                        |  |                                | (273,248 | ) |      |   | (251,797 | )
|Net proceeds (repayments) of other short-term borrowings                         |  |                                | 190,000  |   |      |   | (212,809 | )
|Repayments of other long-term borrowings                                         |  |                                | (1,795   | ) |      |   | (9,451   | )
|Net increase in securities sold under repurchase agreements                      |  |                                | 15,729   |   |      |   | 16,063   |  
|Redemption of junior subordinated debentures                                     |  |                                | (20,620  | ) |      |   | (32,475  | )
|Proceeds from exercise of stock options                                          |  |                                | 2,513    |   |      |   | 2,655    |  
|Payments of cash dividends                                                       |  |                                | (17,041  | ) |      |   | (14,806  | )
|                                                                                 |  |                                |          |   |      |   |          |  
|Net cash used in financing activities                                            |  |                                | (104,447 | ) |      |   | (583,838 | )
|                                                                                 |  |                                |          |   |      |   |          |  
|NET DECREASE CASH AND CASH EQUIVALENTS                                           |  | $                              | (186,160 | ) |      | $ | (27,183  | )
|CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD                                   |  |                                | 371,090  |   |      |   | 269,721  |  
|                                                                                 |  |                                |          |   |      |   |          |  
|CASH AND CASH EQUIVALENTS, END OF PERIOD                                         |  | $                              | 184,930  |   |      | $ | 242,538  |  
|                                                                                 |  |                                |          |   |      |   |          |  
|                                                                                 |  |                               
|NONCASH ACTIVITIES:                                                              |  |                                |          |   |      |   |          |  
|Stock issued in connection with the acquisition of 1stChoice                     |  | $                              | 56,142   |   |      | $ |         |  
|Stock issued in connection with the acquisition of The Bank of Navasota          |  |                                |         |   |      |   | 8,488    |  
|Stock issued in connection with the acquisition of Texas United Bancshares, Inc. |  |                                |         |   |      |   | 380,886  |  
|                                                                                 |  |                               
|SUPPLEMENTAL DISCLOSURES:                                                        |  |                                |          |   |      |   |          |  
|Cash paid for interest                                                           |  | $                              | 89,755   |   |      | $ | 104,945  |  
|Cash paid for income taxes                                                       |  |                                | 34,600   |   |      |   | 22,400   |  

See notes to interim condensed consolidated financial statements.



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##### Table of Contents

PROSPERITY BANCSHARES,
INC.®AND SUBSIDIARIES

NOTES
TO INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

SEPTEMBER 30, 2008

(UNAUDITED)

1. BASIS OF PRESENTATION

The interim condensed consolidated financial statements include the accounts of Prosperity
Bancshares, Inc.® (the Company) and its wholly-owned subsidiaries, Prosperity Bank® (the Bank) and
Prosperity Holdings of Delaware, L.L.C. All significant intercompany transactions and balances have been eliminated.

The accompanying
unaudited interim condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles for interim financial information and with the rules and regulations of the Securities and Exchange
Commission. Accordingly, they do not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements. In the opinion of management, the statements reflect all adjustments necessary
for a fair presentation of the financial position, results of operations and cash flows of the Company on a consolidated basis, and all such adjustments are of a normal recurring nature. These financial statements and the notes thereto should be
read in conjunction with the Companys Annual Report on Form 10-K for the year ended December 31, 2007. Operating results for the nine month period ended September 30, 2008 are not necessarily indicative of the results that may be
expected for the year ending December 31, 2008 or any other period.

2. EARNINGS PER SHARE

The following table illustrates the computation of basic and diluted earnings per share:



|                                                           |  |                                                  |        |                                |   |        |  |      |        |  |   |       
|---------------------------------------------------------- |  | ------------------------------------------------ | ------ | ------------------------------ | - | ------ |  | ---- | ------ |  | - | ------
|                                                           |  | Three Months EndedSeptember 30,                  |        | Nine Months EndedSeptember 30,
|                                                           |  | 2008                                             |        | 2007                           |   | 2008   |  | 2007
|                                                           |  | (Dollars in thousands, except per share amounts)
|Net income available to common shareholders                |  | $                                                | 15,447 |                                | $ | 23,848 |  | $    | 61,822 |  | $ | 67,071
|Weighted average common shares outstanding                 |  |                                                  | 46,065 |                                |   | 43,910 |  |      | 45,038 |  |   | 42,521
|Potential dilutive common shares                           |  |                                                  | 237    |                                |   | 344    |  |      | 179    |  |   | 413   
|                                                           |  |                                                  |        |                                |   |        |  |      |        |  |   |       
|Weighted average common shares and equivalents outstanding |  |                                                  | 46,302 |                                |   | 44,254 |  |      | 45,217 |  |   | 42,934
|                                                           |  |                                                  |        |                                |   |        |  |      |        |  |   |       
|Basic earnings per common share                            |  | $                                                | 0.34   |                                | $ | 0.54   |  | $    | 1.37   |  | $ | 1.58  
|                                                           |  |                                                  |        |                                |   |        |  |      |        |  |   |       
|Diluted earnings per common share                          |  | $                                                | 0.33   |                                | $ | 0.54   |  | $    | 1.37   |  | $ | 1.56  
|                                                           |  |                                                  |        |                                |   |        |  |      |        |  |   |       

Basic earnings per share is computed by dividing net income by the weighted average number of
shares outstanding during the applicable period. Diluted earnings per share is computed using the weighted-average number of shares determined for the basic computation plus the dilutive effect of stock options and non-vested restricted stock
granted using the treasury stock method. There were no stock options exercisable at September 30, 2008 and 2007 that would have had an anti-dilutive effect on the above computation.



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##### Table of Contents

PROSPERITY BANCSHARES, INC.®AND SUBSIDIARIES

NOTES TO
INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

SEPTEMBER 30, 2008

(UNAUDITED)



3. NEW ACCOUNTING STANDARDS

Statements of Financial Accounting Standards

SFAS No. 141(R), Business Combinations (Revised 2007).SFAS 141R replaces SFAS 141, Business Combinations, and applies to all transactions and other events in which one entity obtains control
over one or more other businesses. SFAS 141R requires an acquirer, upon initially obtaining control of another entity, to recognize the assets, liabilities and any non-controlling interest in the acquiree at fair value as of the acquisition
date. Contingent consideration is required to be recognized and measured at fair value on the date of acquisition rather than at a later date when the amount of that consideration may be determinable beyond a reasonable doubt. This fair value
approach replaces the cost-allocation process required under SFAS 141 whereby the cost of an acquisition was allocated to the individual assets acquired and liabilities assumed based on their estimated fair value. SFAS 141R requires
acquirers to expense acquisition-related costs as incurred rather than allocating such costs to the assets acquired and liabilities assumed, as was previously the case under SFAS 141. Under SFAS 141R, the requirements of SFAS 146,
Accounting for Costs Associated with Exit or Disposal Activities, would have to be met in order to accrue for a restructuring plan in purchase accounting. Pre-acquisition contingencies are to be recognized at fair value, unless it is a
non-contractual contingency that is not likely to materialize, in which case, nothing should be recognized in purchase accounting and, instead, that contingency would be subject to the probable and estimable recognition criteria of SFAS 5,
Accounting for Contingencies. SFAS 141R is effective for the Company beginning on January 1, 2009. The Company is currently evaluating the impact of the adoption of SFAS 141R on the Companys accounting for business
combinations closing on or after January 1, 2009.

SFAS No. 157, Fair Value Measurements.SFAS 157
defines fair value, establishes a framework for measuring fair value in generally accepted accounting principles, and expands disclosures about fair value measurements. SFAS 157 was effective for the Company on January 1, 2008 and its
adoption did not have a significant impact on the Companys financial statements. The implementation of SFAS 157 resulted in expanded disclosures about assets and liabilities measured at fair value as discussed in Note 4.

SFAS No. 159, The Fair Value Option for Financial Assets and Financial LiabilitiesIncluding an amendment of FASB Statement
No. 115.SFAS 159 permits entities to choose to measure eligible items at fair value at specified election dates. Unrealized gains and losses on items for which the fair value option has been elected are reported in earnings at
each subsequent reporting date. The fair value option (i) may be applied instrument by instrument, with certain exceptions, (ii) is irrevocable (unless a new election date occurs) and (iii) is applied only to entire instruments and
not to portions of instruments. The Company adopted SFAS No. 159 effective January 1, 2008. The Company elected not to measure any eligible items using the fair value option in accordance with SFAS 159. Accordingly, SFAS 159 did
not have any impact on the Companys financial statements.

SFAS No. 160, Noncontrolling Interest in Consolidated
Financial Statements, an amendment of ARB Statement No. 51.SFAS 160 amends Accounting Research Bulletin (ARB) No. 51, Consolidated Financial Statements, to establish accounting and reporting standards for the
non-controlling interest in a subsidiary and for the deconsolidation of a subsidiary. SFAS 160 clarifies that a non-controlling interest in a subsidiary, which is sometimes referred to as minority interest, is an ownership interest in the
consolidated entity that should be reported as a component of equity in the consolidated financial statements. Among other requirements, SFAS 160 requires consolidated net income to be reported at amounts that include the amounts attributable
to both the parent and the non-controlling interest. It also requires disclosure, on the face of the consolidated income statement, of the amounts of consolidated net income attributable to the parent and to the non-controlling interest.
SFAS 160 is effective for the Company on January 1, 2009 and is not expected to have a significant impact on the Companys financial statements.



9



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##### Table of Contents

PROSPERITY BANCSHARES, INC.®AND SUBSIDIARIES

NOTES TO
INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

SEPTEMBER 30, 2008

(UNAUDITED)



Financial Accounting Standards Board Staff Positions and Interpretations

FASB Staff Position (FSP) No. 157-2.FSP 157-2 delays the effective date of SFAS 157,Fair Value Measurements, for nonfinancial assets
and nonfinancial liabilities, except for items that are recognized or disclosed at fair value in the financial statements on a recurring basis (at least annually). The delay is intended to allow the FASB and constituents additional time to consider
the effect of various implementation issues that have arisen, or that may arise, from the application of SFAS 157. This FSP defers the effective date of SFAS 157 to fiscal years beginning after November 15, 2008, and interim periods within
those fiscal years for items within the scope of this FSP. FSP 157-2 will be effective for the Company on January 1, 2009 and is not expected to have a significant impact on the Companys financial statements.

FASB Staff Position No. 157-3.On October 10, 2008, the FASB issued FASB Staff Position 157- 3 (FSP 157-3) Determining
the Fair Value of a Financial Asset When the Market for That Asset Is Not Active. FSP 157-3 applies to financial assets within the scope of SFAS 157. FSP 157-3 clarifies the application of SFAS 157 in a market that is not active and provides an
example to illustrate key considerations in determining the fair value of a financial asset when the market for that financial asset is not active. In situations in which there is little, if any, market activity for an asset at the measurement date,
the fair value measurement objective remains the same, that is, the price that would be received by the holder of the financial asset in an orderly transaction (an exit price notion) that is not a forced liquidation or distressed sale at the
measurement date. Additionally, in determining fair value for a financial asset, the use of a reporting entitys own assumptions about future cash flows and appropriately risk-adjusted discount rates is acceptable when relevant observable
inputs are not available. Broker (or pricing service) quotes may be an appropriate input when measuring fair value, but they are not necessarily determinative if an active market does not exist for the financial asset. FSP 157-3 was effective for
the Company on September 30, 2008 and did not have a significant impact on the Companys financial statements.

Emerging
Issues Task Force Issues

Emerging Issues Task Force (EITF) Issue No. 06-4, Accounting for Deferred
Compensation and Postretirement Benefit Aspects of Endorsement Split Dollar Life Insurance Arrangements.EITF 06-4 requires the recognition of a liability and related compensation expense for endorsement split-dollar life insurance
policies that provide a benefit to an employee that extends to post-retirement periods. Under EITF 06-4, life insurance policies purchased for the purpose of providing such benefits do not effectively settle an entitys obligation to the
employee. Accordingly, the entity must recognize a liability and related compensation expense during the employees active service period based on the future cost of insurance to be incurred during the employees retirement. If the entity
has agreed to provide the employee with a death benefit, then the liability for the future death benefit should be recognized by following the guidance in SFAS 106, Employers Accounting for Postretirement Benefits Other Than
Pensions. The Company adopted EITF 06-4 effective as of January 1, 2008 as a change in accounting principle through a cumulative-effect adjustment to retained earnings. The amount of the adjustment reduced retained earnings by $2.2
million.

SEC Staff Accounting Bulletins

SAB No. 109, Written Loan Commitments Recorded at Fair Value Through Earnings.SAB No. 109 supersedes SAB 105, Application of Accounting Principles to Loan
Commitments, and indicates that the expected net future cash flows related to the associated servicing of the loan should be included in the measurement of all written loan commitments that are accounted for at fair value through earnings. The
guidance in SAB 109 is applied on a prospective basis to derivative loan commitments issued or modified in fiscal quarters beginning after December 15, 2007. The adoption of SAB 109 did not significantly impact the Companys
financial statements.

4. FAIR VALUE DISCLOSURES

Effective January 1, 2008, the Company adopted SFAS 157 and SFAS 159, which address aspects of the expanding application of fair value accounting.



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##### Table of Contents

PROSPERITY BANCSHARES, INC.®AND SUBSIDIARIES

NOTES TO
INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

SEPTEMBER 30, 2008

(UNAUDITED)



SFAS 157 defines fair value, establishes a framework for measuring fair value and expands disclosure
of fair value measurements. Under SFAS 159, the Company may elect to report select financial assets and liabilities at fair value on an instrument-by-instrument basis with changes in fair value reported in earnings. After the initial adoption,
the election is made at the acquisition of a financial asset or financial liability and it may not be revoked. Additionally, the transition provisions of SFAS 159 permit a one-time election for existing positions at the adoption date with a
cumulative-effect adjustment included in beginning retained earnings and future changes in fair value reported in earnings. The Company elected not to measure any eligible items using the fair value option at adoption date in accordance with SFAS
159.

Fair Value Hierarchy

SFAS 157
specifies a hierarchy of valuation techniques based on whether the inputs to those valuation techniques are observable or unobservable. In accordance with SFAS 157, these inputs are summarized in the three broad levels listed below:



| |  |  | Level 1  Quoted prices in active markets for identical assets or liabilities. Level 1 assets include US Treasury securities that are highly liquid and are
actively traded in over-the-counter markets.
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Level 2  Other significant observable inputs (including quoted prices in active markets for similar assets or liabilities) or other inputs that are observable
or can be corroborated by observable market data for substantially the full term of the assets or liabilities. Level 2 assets include US government and agency mortgage-backed debt securities, corporate securities, municipal bonds and CRA funds.
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Level 3  Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. Level
3 assets and liabilities include financial instruments whose value is determined using pricing models, discounted cash flow methodologies, or similar techniques, as well as instruments for which the determination of fair values requires significant
management judgment or estimation.
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

In determining the appropriate levels, the Company performs a detailed analysis of
the assets and liabilities that are subject to SFAS 157.

The following table presents fair value measurements as of September 30,
2008:



|                                                    |  |                        |     |         |   |         |  |       |   |  |   |        
|--------------------------------------------------- |  | ---------------------- | --- | ------- | - | ------- |  | ----- | - |  | - | -------
|                                                    |  | Level 1                |     | Level 2 |   | Level 3 |  | Total
|                                                    |  | (Dollars in thousands)
|Measured on a recurring basis:                      |  |                        |     |         |   |         |  |       |   |  |   |        
|Interest bearing deposits in financial institutions |  | $                      | 204 |         | $ |        |  | $     |  |  | $ | 204    
|Available for sale securities (at fair value)       |  |                        | 500 |         |   | 228,778 |  |       |  |  |   | 229,278
|                                                    |  |                        |     |         |   |         |  |       |   |  |   |        
|TOTAL                                               |  | $                      | 704 |         | $ | 228,778 |  | $     |  |  | $ | 229,482
|                                                    |  |                        |     |         |   |         |  |       |   |  |   |        



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##### Table of Contents

PROSPERITY BANCSHARES, INC.®AND SUBSIDIARIES

NOTES TO
INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

SEPTEMBER 30, 2008

(UNAUDITED)



5. GOODWILL AND CORE DEPOSIT INTANGIBLES

Changes in the carrying amount of the Companys goodwill and core deposit intangibles (CDI) for nine months ended September 30, 2008 were as
follows:



|                                                         |  |                        |         |   |                            |   |        |  
|-------------------------------------------------------- |  | ---------------------- | ------- | - | -------------------------- | - | ------ | -
|                                                         |  | Goodwill               |         |   | Net CoreDepositIntangibles |  
|                                                         |  | (Dollars in thousands) |        
|Balance as of December 31, 2007                          |  | $                      | 753,909 |   |                            | $ | 46,069 |  
|Amortization                                             |  |                        |        |   |                            |   | (7,513 | )
|Acquisition of 1stChoice
Bancorp                         |  |                        | 47,860  |   |                            |   | 5,355  |  
|Acquisition of Banco Popular branches                    |  |                        | 12,889  |   |                            |   | 1,063  |  
|Acquisition of The Bank of Navasota                      |  |                        | 426     |   |                            |   |       |  
|Acquisitions prior to December 31, 2007 (deferred taxes) |  |                        | (3,168  | ) |                            |   |       |  
|                                                         |  |                        |         |   |                            |   |        |  
|Balance as of September 30, 2008                         |  | $                      | 811,916 |   |                            | $ | 44,974 |  
|                                                         |  |                        |         |   |                            |   |        |  

Purchase accounting adjustments to prior
year acquisitions were made to adjust deferred tax asset and liability balances. Goodwill is recorded on the acquisition date of each entity. The Company may record subsequent adjustments to goodwill for amounts undeterminable at acquisition date,
such as deferred taxes and real estate valuations, and therefore the goodwill amounts reflected in the table above may change accordingly. The Company initially records the total premium paid on acquisitions as goodwill. After finalizing the
valuation, core deposit intangibles are identified and reclassified from goodwill to core deposit intangibles on the balance sheet. This reclassification has no effect on total assets, liabilities, shareholders equity, net income or cash
flows. The Company has not completed its assessment of the fair values of the acquired 1stChoice assets and liabilities and therefore the
allocation of the purchase price to such assets and liabilities is subject to revision. Management performs an annual evaluation of whether any impairment of the goodwill and other intangibles has occurred. If any such impairment is determined, a
write down is recorded. As of September 30, 2008, there were no impairments recorded on goodwill.

Core deposit intangibles are
amortized on an accelerated basis over their estimated lives, which the Company has determined to be between 8 and 10 years. Gross core deposit intangibles outstanding were $74.0 million and $67.6 million at September 30, 2008 and
December 31, 2007, respectively. Net core deposit intangibles outstanding were $45.0 million and $46.1 million at the same dates, respectively. Amortization expense related to intangible assets totaled $2.6 million for both the three months
ended September 30, 2008 and 2007 and $7.5 million and $7.3 million for the nine months ended September 30, 2008 and 2007, respectively. The estimated aggregate future amortization expense for intangible assets remaining as of
September 30, 2008 is as follows (dollars in thousands):



|           |  |   |       
|---------- |  | - | ------
|2008       |  | $ | 2,607 
|2009       |  |   | 8,608 
|2010       |  |   | 7,553 
|2011       |  |   | 6,393 
|2012       |  |   | 5,151 
|Thereafter |  |   | 14,662
|           |  |   |       
|Total      |  | $ | 44,974
|           |  |   |       



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##### Table of Contents

PROSPERITY BANCSHARES, INC.®AND SUBSIDIARIES

NOTES TO
INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

SEPTEMBER 30, 2008

(UNAUDITED)



6. STOCK BASED COMPENSATION

The Company had two stock-based employee compensation plans at September 30, 2008 and five stock option plans assumed in connection with acquisitions
under which no additional options will be granted. Prior to 2003, the Company accounted for those plans under the recognition and measurement provisions of APB Opinion No. 25, Accounting for Stock Issued to Employees, and related
Interpretations. The Company adopted SFAS 123 on January 1, 2003 and prospectively adopted SFAS 123(R) on January 1, 2006. The Company recognized $1.1 million and $1.5 million in stock-based compensation expense for the nine months
ended September 30, 2008 and 2007, respectively and $470,000 and $534,000 in stock-based compensation expense for the three months ended September 30, 2008 and 2007, respectively. There was approximately $235,000 and $315,000 of income tax
benefit recorded for the stock-based compensation expense for the nine months ended September 30, 2008 and 2007, respectively, and $113,000 and $115,000 of income tax benefit recorded for the stock-based compensation expense for the three
months ended September 30, 2008 and 2007, respectively.

The Company has granted shares of common stock subject to forfeiture
restrictions (restricted stock) to certain directors and associates under the Companys 2004 Stock Incentive Plan. The awardee is not entitled to the delivery of the shares until the forfeiture restrictions lapse, which is generally
over a 1 to 5 year period; however the awardee is entitled to receive dividends on and vote the shares prior to the lapse of such restrictions. The shares granted do not have a cost to the awardee and the only requirement of the lapse of the
forfeiture restriction is continued service to the Company. Compensation cost related to restricted stock is calculated based on the fair value of the shares at the date of grant. If the awardee leaves the Company before the forfeiture restrictions
lapse, the unvested shares are forfeited. As of September 30, 2008, there were 81,733 shares of restricted stock outstanding with a weighted average grant date fair value of $32.42.

Stock options are issued at the current market price on the date of the grant, subject to a pre-determined vesting period with a contractual term of 10
years. Options assumed in connection with acquisitions have contractual terms as established in the original option grant agreements entered into prior to acquisition. The fair value of stock options granted is estimated at the date of grant using
the Black-Scholes option-pricing model. Stock-based compensation expense is recognized ratably over the requisite service period for all awards.

The fair value of options was estimated using an option-pricing model with the following weighted average assumptions:



|                        |  |               |   |  |       |  
|----------------------- |  | ------------- | - |  | ----- | -
|                        |  | September 30, |  
|                        |  | 2008          |   |  | 2007  |  
|Expected life in years  |  | 5.02          |   |  | 4.57  |  
|Risk free interest rate |  | 4.14          | % |  | 4.20  | %
|Volatility              |  | 21.22         | % |  | 20.98 | %
|Dividend yield          |  | 1.21          | % |  | 1.23  | %



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PROSPERITY BANCSHARES, INC.®AND SUBSIDIARIES

NOTES TO
INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

SEPTEMBER 30, 2008

(UNAUDITED)



A summary of changes in outstanding vested and unvested options during the nine months ended
September 30, 2008 is set forth below:



|                                         |  |                  |   |  |                                |       |                                           |      |                          |   |      
|---------------------------------------- |  | ---------------- | - |  | ------------------------------ | ----- | ----------------------------------------- | ---- | ------------------------ | - | -----
|                                         |  | Number ofOptions |   |  | Weighted AverageExercise Price |       | Weighted AverageRemaining ContractualTerm |      | Aggregate IntrinsicValue
|                                         |  | (In thousands)   |   |  |                                |       |                                           |      | (In thousands)          
|Options outstanding, beginning of period |  | 1,088            |   |  | $                              | 23.26 |                                           |      |                          |   |      
|Options granted                          |  | 5                |   |  |                                | 24.43 |                                           |      |                          |   |      
|Options forfeited                        |  | (14              | ) |  |                                | 20.98 |                                           |      |                          |   |      
|Options exercised                        |  | (153             | ) |  |                                | 16.41 |                                           |      |                          |   |      
|                                         |  |                  |   |  |                                |       |                                           |      |                          |   |      
|Options outstanding, end of period       |  | 926              |   |  | $                              | 24.46 |                                           | 5.58 |                          | $ | 8,822
|                                         |  |                  |   |  |                                |       |                                           |      |                          |   |      
|Options vested or expected to vest       |  | 898              |   |  | $                              | 24.23 |                                           | 5.49 |                          | $ | 8,766
|                                         |  |                  |   |  |                                |       |                                           |      |                          |   |      
|Options exercisable, end of period       |  | 307              |   |  | $                              | 17.36 |                                           | 4.12 |                          | $ | 5,108
|                                         |  |                  |   |  |                                |       |                                           |      |                          |   |      



A total of 5,000 options were granted during the nine months ended September 30, 2008 and 50,000 options were granted during the nine months ended September 30, 2007. The total intrinsic value of the options
exercised during the nine month periods ended September 30, 2008 and 2007 was $2.7 million and $7.4 million, respectively. The total fair value of options vested during the nine month periods ended September 30, 2008 and 2007 was $385,000
and $296,000, respectively.

A summary of changes in unvested options is set forth below:



|                                                  |  |                                 |   |      |                                      |      |                  |     |   |                                      |   |     
|------------------------------------------------- |  | ------------------------------- | - | ---- | ------------------------------------ | ---- | ---------------- | --- | - | ------------------------------------ | - | ----
|                                                  |  | Nine Months Ended September 30,
|                                                  |  | 2008                            |   | 2007
|                                                  |  | Number ofOptions                |   |      | Weighted AverageGrant Date FairValue |      | Number ofOptions |     |   | Weighted AverageGrant Date FairValue
|                                                  |  | (In thousands)                  |   |      |                                      |      | (In thousands)   |     |   |                                     
|Unvested options outstanding, beginning of period |  | 707                             |   |      | $                                    | 6.52 |                  | 778 |   |                                      | $ | 5.93
|Options granted                                   |  | 5                               |   |      |                                      | 3.85 |                  | 50  |   |                                      |   | 8.39
|Unvested options forfeited                        |  | (3                              | ) |      |                                      | 5.52 |                  | (21 | ) |                                      |   | 5.16
|Options vested                                    |  | (90                             | ) |      |                                      | 4.29 |                  | (94 | ) |                                      |   | 3.13
|                                                  |  |                                 |   |      |                                      |      |                  |     |   |                                      |   |     
|Unvested options outstanding, end of period       |  | 619                             |   |      | $                                    | 6.82 |                  | 713 |   |                                      | $ | 6.49
|                                                  |  |                                 |   |      |                                      |      |                  |     |   |                                      |   |     

The Company received $2.5 million and $2.7 million in cash from the exercise of stock options
during the nine month periods ended September 30, 2008 and 2007, respectively. There was no tax benefit realized from option exercises of the stock-based compensation arrangements during the nine month periods ended September 30, 2008 and
2007.

As of September 30, 2008, there was $2.3 million of total unrecognized compensation expense related to unvested stock-based
compensation arrangements. That cost is expected to be recognized over a weighted average period of 2.0 years.



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##### Table of Contents

PROSPERITY BANCSHARES, INC.®AND SUBSIDIARIES

NOTES TO
INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

SEPTEMBER 30, 2008

(UNAUDITED)



7. SECURITIES

In the third quarter of 2008, as a result of actions taken in September 2008 by the United States Treasury Department and the Federal Housing Finance Agency with respect to Fannie Mae and Freddie Mac, the Company recorded an
other-than-temporary impairment write-down on its Fannie Mae and Freddie Mac perpetual preferred stock, of $14.0 million pre-tax ($9.1 million after-tax) which represents the Companys full carrying cost of its investment.

8. RECENT ACQUISITIONS

On January 10, 2008, the
Company completed its acquisition of six (6) Houston retail branches from Banco Popular North America. In connection with the acquisition, the Company assumed approximately $125.0 million in deposits. Since January 11, 2008, all six
(6) locations have been operating as full service banking centers of Prosperity Bank.

On June 1, 2008, the Company completed its acquisition of 1stChoice Bancorp, Inc and its wholly-owned subsidiary, 1stChoice Bank. 1stChoice Bancorp operated two
(2) banking offices in Houston, Texas, with one location in South Houston and another in the Heights area. Prosperitys Heights banking center was consolidated with the 1stChoice Bancorp Heights location, with the resulting banking center being located in 1stChoices Heights banking office. As of March 31, 2008, 1st Choice Bancorp had, on a consolidated basis, total assets of $313.9 million, loans of $198.9 million, deposits of $285.1 million and stockholders equity of $27.5
million. Under the terms of the definitive agreement, Prosperity issued 1,757,752 shares of Prosperity common stock plus approximately $18,758,000 in cash for all outstanding shares of 1stChoice.



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##### Table of Contents

ITEM 2. MANAGEMENTS DISCUSSION AND ANALYSIS OF
FINANCIAL CONDITION AND RESULTS OF OPERATIONS

Special Cautionary Notice Regarding Forward-Looking Statements

Statements and financial discussion and analysis contained in this quarterly report on Form 10-Q that are not historical facts are forward-looking
statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. The Company intends such forward-looking statements to be covered by the safe harbor provisions for
forward-looking statements contained in the Private Securities Litigation Reform Act of 1995 and are including this statement for purposes of invoking these safe harbor provisions. These forward-looking statements include information about possible
or assumed future results of the Companys operations or performance. By using any of the words believe, expect, anticipate, estimate, continue, intend, may,
will, should, or similar expressions, the Company identifies these forward-looking statements. Many possible factors or events could affect the future financial results and performance of the Company and could cause those
financial results or performance to differ materially from those expressed in the forward-looking statement. These possible events or factors include, without limitation:



| |  | changes in interest rates and market prices, which could reduce the Companys net interest margins, asset valuations and expense expectations;
|- |  | ----------------------------------------------------------------------------------------------------------------------------------------------



| |  | changes in the levels of loan prepayments and the resulting effects on the value of the Companys loan portfolio;
|- |  | -----------------------------------------------------------------------------------------------------------------



| |  | changes in local economic and business conditions which adversely affect the Companys customers and their ability to transact profitable business with the
company, including the ability of the Companys borrowers to repay their loans according to their terms or a change in the value of the related collateral;
|- |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  | volatility and disruption in national and international financial markets;
|- |  | --------------------------------------------------------------------------



| |  | increased competition for deposits and loans adversely affecting rates and terms;
|- |  | ---------------------------------------------------------------------------------



| |  | the timing, impact and other uncertainties of future acquisitions, including the Companys ability to identify suitable future acquisition candidates, the
success or failure in the integration of their operations, and the ability to enter new markets successfully and capitalize on growth opportunities;
|- |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  | increased credit risk in the Companys assets and increased operating risk caused by a material change in commercial, consumer and/or real estate loans as a
percentage of the total loan portfolio;
|- |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  | the failure of assumptions underlying the establishment of and provisions made to the allowance for credit losses;
|- |  | ------------------------------------------------------------------------------------------------------------------



| |  | changes in the availability of funds resulting in increased costs or reduced liquidity;
|- |  | ---------------------------------------------------------------------------------------



| |  | increased asset levels and changes in the composition of assets and the resulting impact on the Companys capital levels and regulatory capital ratios;
|- |  | -------------------------------------------------------------------------------------------------------------------------------------------------------



| |  | the Companys ability to acquire, operate and maintain cost effective and efficient systems without incurring unexpectedly difficult or expensive but necessary
technological changes;
|- |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  | the loss of senior management or operating personnel and the potential inability to hire qualified personnel at reasonable compensation levels;
|- |  | -----------------------------------------------------------------------------------------------------------------------------------------------



| |  | government intervention in the U.S. financial system;
|- |  | -----------------------------------------------------



| |  | changes in statutes and government regulations or their interpretations applicable to financial holding companies and the Companys present and future banking
and other subsidiaries, including changes in tax requirements and tax rates;
|- |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  | acts of terrorism, an outbreak of hostilities or other international or domestic calamities, weather or other acts of God and other matters beyond the
Companys control; and
|- |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  | other risks and uncertainties listed from time to time in the Companys reports and documents filed with the Securities and Exchange Commission.
|- |  | ------------------------------------------------------------------------------------------------------------------------------------------------



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##### Table of Contents

A forward-looking statement may include a statement of the assumptions or bases underlying the
forward-looking statement. The Company believes it has chosen these assumptions or bases in good faith and that they are reasonable. However, the Company cautions you that assumptions or bases almost always vary from actual results, and the
differences between assumptions or bases and actual results can be material. The Company undertakes no obligation to publicly update or otherwise revise any forward-looking statements, whether as a result of new information, future events or
otherwise.

RECENT ACQUISITIONS

On January 10, 2008, the Company completed its acquisition of six (6) Houston retail branches from Banco Popular North America. In connection with the acquisition, the Company assumed approximately $125.0
million in deposits. Since January 11, 2008, all six (6) locations have been operating as full service banking centers of Prosperity Bank.

On June 1, 2008, the Company completed its acquisition of 1st Choice Bancorp, Inc and its
wholly-owned subsidiary, 1stChoice Bank. 1st Choice operated two (2) banking offices in Houston, Texas, with one location in South Houston and
another in the Heights area. Prosperitys Heights banking center was consolidated with the 1stChoice Heights location, with the resulting
banking center being located in 1stChoices Heights banking office. As of March 31, 2008, 1stChoice had, on a consolidated basis, total assets of $313.9 million, loans of $198.9 million, deposits of $285.1 million and stockholders equity of $27.5 million. Under the
terms of the definitive agreement, Prosperity issued 1,757,752 shares of Prosperity common stock plus approximately $18,758,000 in cash for all outstanding shares of 1stChoice.

RECENT DEVELOPMENTS

On October 3, 2008, the Troubled Asset Relief Program (TARP) was signed into law. TARP gave the U.S. Department of the Treasury
(Treasury Department) authority to deploy up to $700 billion into the financial system with an objective of improving liquidity in capital markets. On October 14, 2008, the Treasury Department announced the Capital Purchase Program
(CPP), which provides for direct equity investment of perpetual preferred stock by the Treasury Department in qualified financial institutions. The program is voluntary and requires an institution to comply with a number of restrictions
and provisions, including limits on executive compensation, stock redemptions and declaration of dividends. Applications must be submitted by November 14, 2008 and are subject to approval by the Treasury Department. The CPP provides for the
purchase by the Treasury Department of perpetual senior preferred stock in an aggregate amount ranging from 1% to 3% of a participants risk-weighted assets. The senior preferred stock will pay cumulative dividends at a rate of 5% per
year, until the fifth anniversary of the Treasury Department investment, and at a rate of 9% per year thereafter. The CPP also requires a participant to issue to the Treasury Department warrants to purchase common stock equal to 15% of the
capital invested by the Treasury.

The terms of the CPP could reduce investment returns to the Companys shareholders by restricting
increases in dividends paid on the Companys common stock without the Treasury Departments consent, diluting existing shareholders interests and restricting capital management practices. Although the Company and Prosperity Bank meet
all applicable regulatory capital requirements and Prosperity Bank remains well capitalized, the Company is evaluating whether to participate in the CPP. Participation in the program is not automatic and is subject to approval by the Treasury
Department.

Also on October 14, 2008, the systemic risk exception to the FDIC Act was enacted, enabling the FDIC to temporarily
provide a 100% guarantee of the senior debt of all FDIC-insured institutions and their holding companies, as well as deposits in non-interest bearing transaction deposit accounts under a Temporary Liquidity Guarantee Program. Coverage under the
Temporary Liquidity Guarantee Program is available until December 5, 2008 without charge and thereafter at a cost of 75 basis points per annum for senior unsecured debt and 10 basis points per annum for non-interest bearing transaction
deposits. The Company is evaluating whether to participate in the Temporary Liquidity Guarantee Program.

OVERVIEW

The Company, a Texas corporation, was formed in 1983 as a vehicle to acquire the
former Allied First Bank in Edna, Texas which was chartered in 1949 as The First National Bank of Edna. The Company is a registered financial holding company that derives substantially all of its revenues and income from the operation of its bank
subsidiary, Prosperity Bank® (Prosperity Bank® or the Bank). The Bank provides a wide array of financial
products and services to small and medium-sized businesses and consumers. At September 30, 2008, the Bank operated one hundred thirty-one (131) full-service banking locations; with forty-six (46) in the Greater Houston Consolidated
Metropolitan Statistical Area (CMSA), thirty-three (33) in the South Texas area including Corpus Christi and Victoria, twenty-four (24) in the Central Texas area including Austin, San



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##### Table of Contents

Antonio and Bryan/College Station, two (2) in East Texas and twenty-six (26) in the Dallas/Fort Worth, Texas area. The Greater Houston CMSA
includes Austin, Brazoria, Chambers, Fort Bend, Galveston, Harris, Liberty, Montgomery, San Jacinto and Waller counties. The Companys headquarters are located at Prosperity Bank Plaza, 4295 San Felipe in Houston, Texas and its telephone number
is (713) 693-9300. The Companys website address is www.prosperitybanktx.com. Information contained on the Companys website is not incorporated by reference into this quarterly report on Form 10-Q and is not part of this or
any other report.

The Company generates the majority of its revenues from interest income on loans, service charges on customer accounts
and income from investment in securities. The revenues are partially offset by interest expense paid on deposits and other borrowings and non-interest expenses such as administrative and occupancy expenses. Net interest income is the difference
between interest income on earning assets such as loans and securities and interest expense on liabilities such as deposits and borrowings which are used to fund those assets. The level of interest rates and the volume and mix of earning assets and
interest-bearing liabilities impact net interest income and margin.

Three principal
components of the Companys growth strategy are internal growth, stringent cost control practices and strategic merger transactions. The Company focuses on continual internal growth. Each banking center is operated as a separate profit center,
maintaining separate data with respect to its net interest income, efficiency ratio, deposit growth, loan growth and overall profitability. Banking center presidents and managers are accountable for performance in these areas and compensated
accordingly. The Company also focuses on maintaining stringent cost control practices and policies. The Company has invested significantly in the infrastructure required to centralize many of its critical operations, such as data processing and loan
application processing. Management believes that this centralized infrastructure can accommodate substantial additional growth while enabling the Company to minimize operational costs through certain economies of scale. The Company also intends to
continue to seek expansion opportunities. During 2007, forty-one (41) banking centers were acquired in the acquisition of Texas United Bancshares, Inc. (the TXUI acquisition). The acquisition of The Bank of Navasota, N.A. (the
Navasota acquisition) was completed on September 1, 2007 and added one (1) banking center. On January 10, 2008, the Company purchased six (6) branches of Banco Popular North America and on June 1, 2008 the
Company purchased 1stChoice Bancorp (the 1stChoice acquisition), adding one (1) banking center in Houston after the consolidation of an existing Prosperity location into the 1stChoice Heights location.

As a result of actions taken in early September 2008 by the Treasury Department and the Federal Housing
Finance Agency (FHFA) with respect to Fannie Mae and Freddie Mac, the Company recorded an other-than-temporary impairment and took a non-cash charge of $14.0 million pre-tax ($9.1 million after-tax) to its earnings for the third quarter
of 2008 related to the full carrying cost of its investments in perpetual preferred securities issued by Fannie Mae and Freddie Mac. The value of these securities decreased materially and it is unclear if and when the value will improve.

Total assets were $6.79 billion at September 30, 2008 compared with $6.37 billion at
December 31, 2007, an increase of $415.6 million or 6.5%. Total loans were $3.25 billion at September 30, 2008 compared with $3.14 billion at December 31, 2007, an increase of $105.6 million or 3.4%. Total deposits were $5.10 billion
at September 30, 2008 compared with $4.97 billion December 31, 2007, an increase of $138.4 million or 2.8%. Shareholders equity increased $101.7 million or 9.0%, to $1.23 billion at September 30, 2008 compared with $1.13 billion
at December 31, 2007. The increases were primarily due to the acquisition of 1stChoice and the branches of Banco Popular.

CRITICAL ACCOUNTING POLICIES

The Companys accounting policies are integral to understanding the financial results reported. Accounting policies are described in detail in Note 1 to the consolidated financial statements included in the Companys Annual Report
on Form 10-K for the year ended December 31, 2007. The Company believes that of its significant accounting policies, the following may involve a higher degree of judgment and complexity:

Allowance for Credit LossesThe allowance for credit losses is established through charges to earnings in the form of a provision for credit
losses. Management has established an allowance for credit losses which it believes is adequate for estimated losses in the Companys loan portfolio. Based on an evaluation of the loan portfolio, management presents a monthly review of the
allowance for credit losses to the Banks Board of Directors, indicating any change in the allowance since the last review and any recommendations as to adjustments in the allowance. In making its evaluation, management considers factors such
as historical loan loss experience, industry diversification of the Companys commercial loan portfolio, the amount of nonperforming assets and related collateral, the volume, growth and composition of the Companys loan portfolio, current
economic changes that may affect the borrowers ability to pay and the value of collateral, the evaluation of the Companys loan portfolio through its internal loan review process and other relevant factors. Portions of the allowance may
be allocated for specific credits; however, the entire allowance is available for any credit that, in managements judgment, should be charged off.



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##### Table of Contents

Charge-offs occur when loans are deemed to be uncollectible. The allowance for credit losses includes allowance allocations calculated in accordance with
Statement of Financial Accounting Standards (SFAS) No. 114, Accounting by Creditors for Impairment of a Loan, as amended by SFAS 118, and allowance allocations determined in accordance with SFAS No. 5,
Accounting for Contingencies.

GoodwillGoodwill and intangible assets that have indefinite useful lives are
subject to an annual impairment test and more frequently if circumstances indicate their value may not be recoverable. Goodwill is tested for impairment using a two-step process that begins with an estimation of the fair value of each of the
Companys reporting units compared with its carrying value. If the carrying amount exceeds the fair value of a reporting unit, a second test is conducted comparing the implied fair value of the reporting units goodwill to its carrying
value to measure the amount of impairment. Intangible assets that are not amortized will be tested for impairment at least annually by comparing the fair values of those assets to their carrying values. Other identifiable intangible assets that are
subject to amortization are amortized on an accelerated basis over the years expected to be benefited, which the Company believes is between eight and ten years. These amortizable intangible assets are reviewed for impairment if circumstances
indicate their value may not be recoverable based on a comparison of fair value to carrying value. Based on the Companys annual goodwill impairment test as of September 30, 2008, management does not believe any of its goodwill is impaired
as of September 30, 2008. While the Company believes no impairment existed at September 30, 2008 under accounting standards applicable at that date, different conditions or assumptions, or changes in cash flows or profitability, if
significantly negative or unfavorable, could have a material adverse effect on the outcome of the Companys impairment evaluation and financial condition or future results of operations.

Stock-Based CompensationThe Company adopted the provisions of SFAS No. 123R Share-Based Payment (Revised 2004), on
January 1, 2006 and its adoption did not have a material impact on the Companys financial statements. The Company had previously adopted SFAS No. 123 on January 1, 2003. Among other things, SFAS No. 123R eliminates the
ability to account for stock-based compensation using the intrinsic value based method of accounting and requires that such transactions be recognized as compensation expense in the income statement based on their fair values on the date of the
grant. SFAS No. 123R requires that management make assumptions including stock price volatility and employee turnover that are utilized to measure compensation expense. The fair value of stock options granted is estimated at the date of grant
using the Black-Scholes option-pricing model. This model requires the input of highly subjective assumptions.

Valuation of
SecuritiesThe Companys available for sale securities portfolio is reported at fair value. When the fair value of a security is below its amortized cost, and depending on the length of time the condition exists and the extent the fair
market value is below amortized cost, additional analysis is performed to determine whether an impairment exists. Available for sale and held to maturity securities are analyzed quarterly for possible other-than-temporary impairment. The analysis
considers (i) the length of time and the extent to which the fair value has been less than cost, (ii) the financial condition and near-term prospects of the issuer, and (iii) the intent and ability of the Company to retain its
investment in the issuer for a period of time sufficient to allow for any anticipated recovery in fair value. Often, the information available to conduct these assessments is limited and rapidly changing, making estimates of fair value subject to
judgment. If actual information or conditions are different than estimated, the extent of the impairment of the security may be different than previously estimated, which could have a material effect on the Companys results of operations and
financial condition.

RESULTS OF OPERATIONS

Net income available to common shareholders was $15.4 million ($0.33 per common share on a diluted basis) for the quarter ended September 30, 2008 compared with $23.8 million ($0.54 per common share on a diluted
basis) for the quarter ended September 30, 2007, a decrease in net income of $8.4 million, or 35.2%. The decrease was due to a $9.1 million after-tax ($14.0 million pre-tax) impairment charge on Fannie Mae and Freddie Mac perpetual preferred
securities. The Company posted returns on average common equity of 5.04% and 8.67%, returns on average assets of 0.91% and 1.53% and efficiency ratios of 45.30% and 46.41% for the quarters ended September 30, 2008 and 2007, respectively. The
efficiency ratio is calculated by dividing total non-interest expense (excluding credit loss provisions) by net interest income plus noninterest income (excluding net gains and losses on the sale of securities and assets and impairment write-down on
securities). Additionally, taxes are not part of this calculation.

For the nine months ended September 30, 2008, net income available
to common shareholders was $61.8 million ($1.37 per common share on a diluted basis) compared with $67.1 million ($1.56 per common share on a diluted basis) for the same period in 2007, a decrease in net income of $5.2 million or 7.8%. The decrease
was due to a $9.1 million after-tax ($14.0 million pre-tax) impairment charge on Fannie Mae and Freddie Mac perpetual preferred securities. The Company posted returns on average common equity of 6.97% and 8.62%, returns on average assets of 1.25%
and 1.47% and efficiency ratios of 45.51% and 46.58% for the nine months ended September 30, 2008 and 2007, respectively.



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##### Table of Contents

Net Interest Income

The Companys net interest income is affected by changes in the amount and mix of interest-earning assets and interest-bearing liabilities, referred to as a volume change. It is also affected by
changes in yields earned on interest-earning assets and rates paid on interest-bearing deposits and other borrowed funds, referred to as a rate change.

Net interest income on a tax equivalent basis was $58.5 million for the quarter ended
September 30, 2008 compared with $52.2 million for the quarter ended September 30, 2007, an increase of $6.3 million, or 12.1%. Net interest income increased as a result of an increase in average interest-earning assets and rates paid on
interest-bearing liabilities decreasing at a faster pace than the yield on interest-earning assets. Interest-earning assets increased to $5.60 billion for the quarter ended September 30, 2008 compared with $5.09 billion for the quarter ended
September 30, 2007, an increase of $513.6 million, or 10.1%. The increase in average interest-earning assets was primarily attributable to increases in average loans and securities in the quarter ended September 30, 2008 compared with the
quarter ended September 30, 2007 resulting from the 1stChoice and Bank of Navasota acquisitions.

The net interest margin on a tax equivalent basis increased to 4.15% for the quarter ended September 30, 2008 compared with 4.07% for the quarter
ended September 30, 2007. The average rate paid on interest-bearing liabilities decreased 120 basis points from 3.73% for the quarter ended September 30, 2007 compared with 2.53% for the quarter ended September 30, 2008, while the
average yield on earning assets decreased 83 basis points from 6.86% for the quarter ended September 30, 2007 compared with 6.03% for the quarter ended September 30, 2008. Average interest-bearing liabilities increased $357.9 million and
average interest-earning assets increased $513.6 million for the same periods.

Net
interest income on a tax equivalent basis increased $14.9 million, or 9.9%, to $166.0 million for the nine months ended September 30, 2008 compared with $151.1 million for the same period in 2007. This increase was mainly attributable to higher
average interest-earning assets resulting from an increase in average loans and securities due to the acquisition of 1stChoice and Bank of Navasota
and the full-year effect of the TXUI acquisition and rates paid on interest-bearing liabilities decreasing at a faster pace than the yield on interest-earning assets. The net interest margin on a tax equivalent basis for the nine months ended
September 30, 2007 increased 6 basis points to 4.10% compared with 4.04% for the same period in 2007. The average rate paid on interest-bearing liabilities decreased 84 basis points from 3.67% for the nine months ended September 30, 2007
compared with 2.83% for the same period in 2008 and the average yield on earning assets decreased 61 basis points from 6.82% for the nine months ended September 30, 2007 compared with 6.21% for the nine months ended September 30, 2008.



20



---

##### Table of Contents

The following tables set forth, for each category of interest-earning assets and interest-bearing
liabilities, the average amounts outstanding, the interest earned or paid on such amounts, and the average rate earned or paid for the quarters ended September 30, 2008 and 2007 and the nine months ended September 30, 2008 and 2007. The
tables also set forth the average rate paid on total interest-bearing liabilities, and the net interest margin on average total interest-earning assets for the same periods. Except as indicated in the footnotes, no tax-equivalent adjustments were
made and all average balances are daily average balances. Any nonaccruing loans have been included in the table as loans carrying a zero yield.



|                                                          |  |                                  |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |        |  |      |  
|--------------------------------------------------------- |  | -------------------------------- | --------- | - | ------------------- | - | --------------------- |  | ---- | ------------------------- |  | - | ------------------- | - | --------------------- | - | ------ |  | ---- | -
|                                                          |  | Three Months Ended September 30, |          
|                                                          |  | 2008                             |           |   | 2007                |  
|                                                          |  | AverageOutstandingBalance        |           |   | InterestEarned/Paid |   | AverageYield/Rate (4) |  |      | AverageOutstandingBalance |  |   | InterestEarned/Paid |   | AverageYield/Rate (4) |  
|                                                          |  | (Dollars in thousands)           |          
|Assets                                                    |  |                                  |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |        |  |      |  
|Interest-earning assets:                                  |  |                                  |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |        |  |      |  
|Loans                                                     |  | $                                | 3,289,203 |   |                     | $ | 56,925                |  | 6.89 | %                         |  | $ | 3,143,076           |   |                       | $ | 64,036 |  | 8.08 | %
|Securities (1)                                            |  |                                  | 2,292,571 |   |                     |   | 27,834                |  | 4.86 |                           |  |   | 1,892,030           |   |                       |   | 23,316 |  | 4.93 |  
|Federal funds sold and other temporary investments        |  |                                  | 18,854    |   |                     |   | 87                    |  | 1.84 |                           |  |   | 51,880              |   |                       |   | 652    |  | 4.99 |  
|                                                          |  |                                  |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |        |  |      |  
|Total interest-earning assets                             |  |                                  | 5,600,628 |   |                     |   | 84,846                |  | 6.03 | %                         |  |   | 5,086,986           |   |                       |   | 88,004 |  | 6.86 | %
|                                                          |  |                                  |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |        |  |      |  
|Less allowance for credit losses                          |  |                                  | (33,746   | ) |                     |   |                       |  |      |                           |  |   | (35,862             | ) |                       |   |        |  |      |  
|                                                          |  |                                  |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |        |  |      |  
|Total interest-earning assets, net of allowance           |  |                                  | 5,566,882 |   |                     |   |                       |  |      |                           |  |   | 5,051,124           |   |                       |   |        |  |      |  
|Noninterest-earning assets                                |  |                                  | 1,234,567 |   |                     |   |                       |  |      |                           |  |   | 1,182,150           |   |                       |   |        |  |      |  
|                                                          |  |                                  |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |        |  |      |  
|Total assets                                              |  | $                                | 6,801,449 |   |                     |   |                       |  |      |                           |  | $ | 6,233,274           |   |                       |   |        |  |      |  
|                                                          |  |                                  |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |        |  |      |  
|Liabilities and shareholders equity                      |  |                                  |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |        |  |      |  
|Interest-bearing liabilities:                             |  |                                  |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |        |  |      |  
|Interest-bearing demand deposits                          |  | $                                | 712,741   |   |                     | $ | 1,565                 |  | 0.87 | %                         |  | $ | 795,016             |   |                       | $ | 3,880  |  | 1.94 | %
|Savings and money market accounts                         |  |                                  | 1,439,838 |   |                     |   | 6,783                 |  | 1.87 |                           |  |   | 1,214,542           |   |                       |   | 9,503  |  | 3.10 |  
|Certificates of deposit                                   |  |                                  | 1,767,712 |   |                     |   | 15,526                |  | 3.49 |                           |  |   | 1,567,848           |   |                       |   | 18,411 |  | 4.66 |  
|Junior subordinated debentures                            |  |                                  | 92,265    |   |                     |   | 1,410                 |  | 6.08 |                           |  |   | 119,328             |   |                       |   | 2,358  |  | 7.84 |  
|Securities sold under repurchase agreements               |  |                                  | 95,533    |   |                     |   | 631                   |  | 2.63 |                           |  |   | 82,973              |   |                       |   | 935    |  | 4.47 |  
|Federal funds purchased and other borrowings              |  |                                  | 146,172   |   |                     |   | 1,125                 |  | 3.06 |                           |  |   | 116,609             |   |                       |   | 1,548  |  | 5.27 |  
|                                                          |  |                                  |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |        |  |      |  
|Total interest-bearing liabilities                        |  |                                  | 4,254,261 |   |                     |   | 27,040                |  | 2.53 | %                         |  |   | 3,896,316           |   |                       |   | 36,635 |  | 3.73 | %
|                                                          |  |                                  |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |        |  |      |  
|Noninterest-bearing liabilities:                          |  |                                  |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |        |  |      |  
|Noninterest-bearing demand deposits                       |  |                                  | 1,266,924 |   |                     |   |                       |  |      |                           |  |   | 1,170,352           |   |                       |   |        |  |      |  
|Other liabilities                                         |  |                                  | 55,105    |   |                     |   |                       |  |      |                           |  |   | 66,678              |   |                       |   |        |  |      |  
|                                                          |  |                                  |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |        |  |      |  
|Total liabilities                                         |  |                                  | 5,576,290 |   |                     |   |                       |  |      |                           |  |   | 5,133,346           |   |                       |   |        |  |      |  
|                                                          |  |                                  |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |        |  |      |  
|Shareholders equity                                      |  |                                  | 1,225,159 |   |                     |   |                       |  |      |                           |  |   | 1,099,928           |   |                       |   |        |  |      |  
|                                                          |  |                                  |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |        |  |      |  
|Total liabilities and shareholders equity                |  | $                                | 6,801,449 |   |                     |   |                       |  |      |                           |  | $ | 6,233,274           |   |                       |   |        |  |      |  
|                                                          |  |                                  |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |        |  |      |  
|Net interest rate spread                                  |  |                                  |           |   |                     |   |                       |  | 3.50 | %                         |  |   |                     |   |                       |   |        |  | 3.13 | %
|Net interest income and margin (2)                        |  |                                  |           |   |                     | $ | 57,806                |  | 4.11 | %                         |  |   |                     |   |                       | $ | 51,369 |  | 4.01 | %
|                                                          |  |                                  |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |        |  |      |  
|Net interest income and margin (tax-equivalent basis) (3) |  |                                  |           |   |                     | $ | 58,471                |  | 4.15 | %                         |  |   |                     |   |                       | $ | 52,182 |  | 4.07 | %
|                                                          |  |                                  |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |        |  |      |  



|(1) |  | Yield is based on amortized cost and does not include any component of unrealized gains or losses.
|--- |  | --------------------------------------------------------------------------------------------------



|(2) |  | The net interest margin is equal to net interest income divided by average interest-earning assets.
|--- |  | ---------------------------------------------------------------------------------------------------



|(3) |  | In order to make pretax income and resultant yields on tax-exempt investments and loans comparable to those on taxable investments and loans, a tax-equivalent adjustment has been
computed using a federal income tax rate of 35%.
|--- |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|(4) |  | Annualized. Average yield and average rate are calculated on an actual/365 or actual/366 day basis except for the average yield on securities which is calculated on a 30/360 day
basis.
|--- |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



21



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##### Table of Contents

|                                                          |  |                                 |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |         |  |      |  
|--------------------------------------------------------- |  | ------------------------------- | --------- | - | ------------------- | - | --------------------- |  | ---- | ------------------------- |  | - | ------------------- | - | --------------------- | - | ------- |  | ---- | -
|                                                          |  | Nine Months Ended September 30, |          
|                                                          |  | 2008                            |           |   | 2007                |  
|                                                          |  | AverageOutstandingBalance       |           |   | InterestEarned/Paid |   | AverageYield/Rate (4) |  |      | AverageOutstandingBalance |  |   | InterestEarned/Paid |   | AverageYield/Rate (4) |  
|                                                          |  | (Dollars in thousands)          |          
|Assets                                                    |  |                                 |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |         |  |      |  
|Interest-earning assets:                                  |  |                                 |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |         |  |      |  
|Loans                                                     |  | $                               | 3,212,176 |   |                     | $ | 171,393               |  | 7.13 | %                         |  | $ | 3,078,065           |   |                       | $ | 185,919 |  | 8.08 | %
|Securities (1)                                            |  |                                 | 2,134,396 |   |                     |   | 78,473                |  | 4.90 |                           |  |   | 1,865,847           |   |                       |   | 67,021  |  | 4.79 |  
|Federal funds sold and other temporary investments        |  |                                 | 61,264    |   |                     |   | 1,424                 |  | 3.10 |                           |  |   | 58,117              |   |                       |   | 2,228   |  | 5.13 |  
|                                                          |  |                                 |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |         |  |      |  
|Total interest-earning assets                             |  |                                 | 5,407,836 |   |                     |   | 251,290               |  | 6.21 | %                         |  |   | 5,002,029           |   |                       |   | 255,168 |  | 6.82 | %
|                                                          |  |                                 |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |         |  |      |  
|Less allowance for credit losses                          |  |                                 | (32,839   | ) |                     |   |                       |  |      |                           |  |   | (34,742             | ) |                       |   |         |  |      |  
|                                                          |  |                                 |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |         |  |      |  
|Total interest-earning assets, net of allowance           |  |                                 | 5,374,997 |   |                     |   |                       |  |      |                           |  |   | 4,967,287           |   |                       |   |         |  |      |  
|Noninterest-earning assets                                |  |                                 | 1,213,656 |   |                     |   |                       |  |      |                           |  |   | 1,119,480           |   |                       |   |         |  |      |  
|                                                          |  |                                 |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |         |  |      |  
|Total assets                                              |  | $                               | 6,588,653 |   |                     |   |                       |  |      |                           |  | $ | 6,086,767           |   |                       |   |         |  |      |  
|                                                          |  |                                 |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |         |  |      |  
|Liabilities and shareholders equity                      |  |                                 |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |         |  |      |  
|Interest-bearing liabilities:                             |  |                                 |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |         |  |      |  
|Interest-bearing demand deposits                          |  | $                               | 775,730   |   |                     | $ | 6,338                 |  | 1.09 | %                         |  | $ | 830,770             |   |                       | $ | 12,803  |  | 2.06 | %
|Savings and money market accounts                         |  |                                 | 1,354,694 |   |                     |   | 20,875                |  | 2.06 |                           |  |   | 1,211,118           |   |                       |   | 26,800  |  | 2.96 |  
|Certificates of deposit                                   |  |                                 | 1,712,402 |   |                     |   | 50,816                |  | 3.96 |                           |  |   | 1,536,277           |   |                       |   | 52,725  |  | 4.59 |  
|Junior subordinated debentures                            |  |                                 | 101,429   |   |                     |   | 4,987                 |  | 6.57 |                           |  |   | 128,522             |   |                       |   | 7,852   |  | 8.17 |  
|Securities sold under repurchase agreements               |  |                                 | 81,390    |   |                     |   | 1,809                 |  | 2.97 |                           |  |   | 72,724              |   |                       |   | 2,319   |  | 4.26 |  
|Federal funds purchased and other borrowings              |  |                                 | 106,572   |   |                     |   | 2,693                 |  | 3.38 |                           |  |   | 97,757              |   |                       |   | 3,867   |  | 5.29 |  
|                                                          |  |                                 |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |         |  |      |  
|Total interest-bearing liabilities                        |  |                                 | 4,132,217 |   |                     |   | 87,518                |  | 2.83 | %                         |  |   | 3,877,168           |   |                       |   | 106,366 |  | 3.67 | %
|                                                          |  |                                 |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |         |  |      |  
|Noninterest-bearing liabilities:                          |  |                                 |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |         |  |      |  
|Noninterest-bearing demand deposits                       |  |                                 | 1,212,379 |   |                     |   |                       |  |      |                           |  |   | 1,123,452           |   |                       |   |         |  |      |  
|Other liabilities                                         |  |                                 | 61,405    |   |                     |   |                       |  |      |                           |  |   | 48,678              |   |                       |   |         |  |      |  
|                                                          |  |                                 |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |         |  |      |  
|Total liabilities                                         |  |                                 | 5,406,001 |   |                     |   |                       |  |      |                           |  |   | 5,049,298           |   |                       |   |         |  |      |  
|                                                          |  |                                 |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |         |  |      |  
|Shareholders equity                                      |  |                                 | 1,182,652 |   |                     |   |                       |  |      |                           |  |   | 1,037,469           |   |                       |   |         |  |      |  
|                                                          |  |                                 |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |         |  |      |  
|Total liabilities and shareholders equity                |  | $                               | 6,588,653 |   |                     |   |                       |  |      |                           |  | $ | 6,086,767           |   |                       |   |         |  |      |  
|                                                          |  |                                 |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |         |  |      |  
|Net interest rate spread                                  |  |                                 |           |   |                     |   |                       |  | 3.38 | %                         |  |   |                     |   |                       |   |         |  | 3.15 | %
|Net interest income and margin (2)                        |  |                                 |           |   |                     | $ | 163,772               |  | 4.05 | %                         |  |   |                     |   |                       | $ | 148,802 |  | 3.98 | %
|                                                          |  |                                 |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |         |  |      |  
|Net interest income and margin (tax-equivalent basis) (3) |  |                                 |           |   |                     | $ | 165,995               |  | 4.10 | %                         |  |   |                     |   |                       | $ | 151,088 |  | 4.04 | %
|                                                          |  |                                 |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |         |  |      |  



|(1) |  | Yield is based on amortized cost and does not include any component of unrealized gains or losses.
|--- |  | --------------------------------------------------------------------------------------------------



|(2) |  | The net interest margin is equal to net interest income divided by average interest-earning assets.
|--- |  | ---------------------------------------------------------------------------------------------------



|(3) |  | In order to make pretax income and resultant yields on tax-exempt investments and loans comparable to those on taxable investments and loans, a tax-equivalent adjustment has been
computed using a federal income tax rate of 35%.
|--- |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|(4) |  | Annualized. Average yield and average rate are calculated on an actual/365 or actual/366 day basis except for the average yield on securities which is calculated on a 30/360 day
basis.
|--- |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



22



---

##### Table of Contents

The following tables present the dollar amount of changes in interest income and interest expense for the
major components of interest-earning assets and interest-bearing liabilities and distinguish between the increase (decrease) related to outstanding balances and the volatility of interest rates. For purposes of these tables, changes attributable to
both rate and volume which cannot be segregated have been allocated to rate.



|                                                   |  |                                  |        |   |      |   |         |       |  |   |         |  
|-------------------------------------------------- |  | -------------------------------- | ------ | - | ---- | - | ------- | ----- |  | - | ------- | -
|                                                   |  | Three Months Ended September 30, |       
|                                                   |  | 2008 vs. 2007                    |       
|                                                   |  | Increase (Decrease)Due to        |        |   |      |  
|                                                   |  | Volume                           |        |   | Rate |   |         | Total | 
|                                                   |  | (Dollars in thousands)           |       
|Interest-earning assets:                           |  |                                  |        |   |      |   |         |       |  |   |         |  
|Loans                                              |  | $                                | 2,977  |   |      | $ | (10,088 | )     |  | $ | (7,111  | )
|Securities                                         |  |                                  | 4,936  |   |      |   | (418    | )     |  |   | 4,518   |  
|Federal funds sold and other temporary investments |  |                                  | (415   | ) |      |   | (150    | )     |  |   | (565    | )
|                                                   |  |                                  |        |   |      |   |         |       |  |   |         |  
|Total increase in interest income                  |  |                                  | 7,498  |   |      |   | (10,656 | )     |  |   | (3,158  | )
|                                                   |  |                                  |        |   |      |   |         |       |  |   |         |  
|Interest-bearing liabilities:                      |  |                                  |        |   |      |   |         |       |  |   |         |  
|Interest-bearing demand deposits                   |  |                                  | (402   | ) |      |   | (1,913  | )     |  |   | (2,315  | )
|Savings and money market accounts                  |  |                                  | 1,763  |   |      |   | (4,483  | )     |  |   | (2,720  | )
|Certificates of deposit                            |  |                                  | 2,347  |   |      |   | (5,232  | )     |  |   | (2,885  | )
|Junior subordinated debentures                     |  |                                  | (535   | ) |      |   | (413    | )     |  |   | (948    | )
|Securities sold under repurchase agreements        |  |                                  | 142    |   |      |   | (446    | )     |  |   | (304    | )
|Federal funds purchased and other borrowings       |  |                                  | 392    |   |      |   | (815    | )     |  |   | (423    | )
|                                                   |  |                                  |        |   |      |   |         |       |  |   |         |  
|Total increase in interest expense                 |  |                                  | 3,707  |   |      |   | (13,302 | )     |  |   | (9,595  | )
|                                                   |  |                                  |        |   |      |   |         |       |  |   |         |  
|Increase in net interest income                    |  | $                                | 3,791  |   |      | $ | 2,646   |       |  | $ | 6,437   |  
|                                                   |  |                                  |        |   |      |   |         |       |  |   |         |  
|                                                   | 
|                                                   |  | Nine Months Ended September 30,  |       
|                                                   |  | 2008 vs. 2007                    |       
|                                                   |  | Increase (Decrease)Due to        |        |   |      |  
|                                                   |  | Volume                           |        |   | Rate |   |         | Total | 
|                                                   |  | (Dollars in thousands)           |       
|Interest-earning assets:                           |  |                                  |        |   |      |   |         |       |  |   |         |  
|Loans                                              |  | $                                | 8,100  |   |      | $ | (22,626 | )     |  | $ | (14,526 | )
|Securities                                         |  |                                  | 9,646  |   |      |   | 1,806   |       |  |   | 11,452  |  
|Federal funds sold and other temporary investments |  |                                  | 121    |   |      |   | (925    | )     |  |   | (804    | )
|                                                   |  |                                  |        |   |      |   |         |       |  |   |         |  
|Total increase in interest income                  |  |                                  | 17,867 |   |      |   | (21,745 | )     |  |   | (3,878  | )
|                                                   |  |                                  |        |   |      |   |         |       |  |   |         |  
|Interest-bearing liabilities:                      |  |                                  |        |   |      |   |         |       |  |   |         |  
|Interest-bearing demand deposits                   |  |                                  | (848   | ) |      |   | (5,617  | )     |  |   | (6,465  | )
|Savings and money market accounts                  |  |                                  | 3,177  |   |      |   | (9,102  | )     |  |   | (5,925  | )
|Certificates of deposit                            |  |                                  | 6,045  |   |      |   | (7,954  | )     |  |   | (1,909  | )
|Junior subordinated debentures                     |  |                                  | (1,655 | ) |      |   | (1,210  | )     |  |   | (2,865  | )
|Securities sold under repurchase agreements        |  |                                  | 276    |   |      |   | (786    | )     |  |   | (510    | )
|Federal funds purchased and other borrowings       |  |                                  | 349    |   |      |   | (1,523  | )     |  |   | (1,174  | )
|                                                   |  |                                  |        |   |      |   |         |       |  |   |         |  
|Total increase in interest expense                 |  |                                  | 7,344  |   |      |   | (26,192 | )     |  |   | (18,848 | )
|                                                   |  |                                  |        |   |      |   |         |       |  |   |         |  
|Increase (decrease) in net interest income         |  | $                                | 10,523 |   |      | $ | 4,447   |       |  | $ | 14,970  |  
|                                                   |  |                                  |        |   |      |   |         |       |  |   |         |  

Provision for Credit Losses

Management actively monitors the Companys asset quality and provides specific loss provisions when necessary. Provisions for credit losses are charged to income to bring the total allowance for credit losses to
a level deemed appropriate by management of the Company based on such factors as historical credit loss experience, industry diversification of the commercial loan portfolio, the amount of nonperforming loans and related collateral, the volume
growth and composition of the loan portfolio, current economic conditions that may affect the borrowers ability to pay and the value of collateral, the evaluation of the loan portfolio through the internal loan review function and other
relevant factors.



23



---

##### Table of Contents

Loans are charged-off against the allowance for credit losses when appropriate. Although management
believes it uses the best information available to make determinations with respect to the provision for credit losses, future adjustments may be necessary if economic conditions differ from the assumptions used in making the initial determinations.

The Company made a $1.7 million provision for credit losses for the quarter ended September 30, 2008 and a $75,000 provision for the
quarter ended September 30, 2007. The Company made a $3.9 million provision for credit losses for the nine months ended September 30, 2008 and a $640,000 provision for the nine months ended September 30, 2007. Both increases were
primarily due to increased charge-offs. The ratio of the allowance for credit losses to end of period nonperforming loans was 496.8% at September 30, 2008 compared with 634.7% at December 31, 2007. The ratio of allowance for credit losses
to total loans was 1.05% at September 30, 2008 compared with 1.04% at December 31, 2007. For the quarter ended September 30, 2008, net charge-offs were $1.8 million compared with net charge-offs of $1.3 million for the quarter ended
September 30, 2007. Net charge-offs were $4.6 million for the nine months ended September 30, 2008 compared with $2.5 million for the nine months ended September 30, 2007.

Noninterest Income

The Companys primary
sources of noninterest income are service charges on deposit accounts, which includes insufficient funds charges and other banking-related service fees. Noninterest income does not include loan origination fees which are recognized over the life of
the related loan as an adjustment to yield using the interest method. Banking-related service fees include check cashing fees, official check fees, safe deposit box rent and currency handling fees. Noninterest income totaled $13.1 million for the
three months ended September 30, 2008 compared with $14.2 million for the same period in 2007, a decrease of $1.0 million, or 7.4%. Noninterest income decreased $813,000, or 2.0%, to $38.9 million for the nine months ended September 30,
2008 compared with $39.7 million for the same period in 2007. The decreases during both periods were primarily due to decreases in gains on sales of held for sale loans and sales of other real estate, partially offset by an increase in insufficient
funds charges and customer service charges which mainly resulted from an increase in the number of accounts due to the acquisition of 1stChoice,
Bank of Navasota and the six branches of Banco Popular. At September 30, 2008, the three acquisitions added approximately 22,000 deposit accounts and over 10,000 debit cards.

The net gain on sale of held for sale loans was $46,000 for the three months ended September 30, 2008 compared with $269,000 for the three months
ended September 30, 2007. The net gain on sale of held for sale loans was $229,000 for the nine months ended September 30, 2008 compared with $1.2 million for the same period in 2007. In February 2007, the Company acquired a mortgage
operations division in the TXUI acquisition that originated mortgage loans for sale into the secondary market. Beginning in the fourth quarter of 2007, the Company ceased originating mortgage loans for sale into the secondary market. The Company
will continue to recognize gains and losses in future periods on loans originated prior to September 30, 2007.

Investment and trust
income was $104,000 for the three months ended September 30, 2008 compared with $170,000 for the three months ended September 30, 2007. Investment and trust income was $272,000 for the nine months ended September 30, 2008 compared
with $1.1 million for the same period in 2007. The decrease in both periods was due to the dissolution in the second quarter of 2007 of the trust department acquired in the TXUI acquisition.

The net loss on sale of other real estate was $210,000 for the three months ended September 30, 2008 compared with a net gain of $452,000 for the
three months ended September 30, 2007. The net loss on sale of other real estate was $648,000 for the nine months ended September 30, 2008 compared with a net gain of $552,000 for the same period in 2007.



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The following table presents, for the periods indicated, the major categories of noninterest income:



|                                             |  |                                 |        |                                |      |   |        |  |   |        |   |  |   |       
|-------------------------------------------- |  | ------------------------------- | ------ | ------------------------------ | ---- | - | ------ |  | - | ------ | - |  | - | ------
|                                             |  | Three Months EndedSeptember 30, |        | Nine Months EndedSeptember 30,
|                                             |  | 2008                            |        |                                | 2007 |   | 2008   |  |   | 2007  
|                                             |  | (Dollars in thousands)         
|Service charges on deposit accounts          |  | $                               | 11,348 |                                |      | $ | 10,785 |  | $ | 32,581 |   |  | $ | 29,908
|Banking-related service fees                 |  |                                 | 522    |                                |      |   | 445    |  |   | 1,446  |   |  |   | 1,287 
|Brokered mortgage income                     |  |                                 | 74     |                                |      |   | 188    |  |   | 296    |   |  |   | 574   
|Investment and trust income                  |  |                                 | 104    |                                |      |   | 170    |  |   | 272    |   |  |   | 1,146 
|Income from leased assets                    |  |                                 | 315    |                                |      |   | 353    |  |   | 997    |   |  |   | 980   
|Bank owned life insurance income (BOLI)      |  |                                 | 408    |                                |      |   | 504    |  |   | 1,313  |   |  |   | 1,402 
|Net gain on sale of assets                   |  |                                 | 34     |                                |      |   | 187    |  |   | 715    |   |  |   | 182   
|Net gain on sale of securities               |  |                                 |       |                                |      |   | 58     |  |   |       |   |  |   | 58    
|Net (loss) gain on sale of other real estate |  |                                 | (210   | )                              |      |   | 452    |  |   | (648   | ) |  |   | 552   
|Net gain on sale of held for sale loans      |  |                                 | 46     |                                |      |   | 269    |  |   | 229    |   |  |   | 1,202 
|Other noninterest income                     |  |                                 | 476    |                                |      |   | 748    |  |   | 1,661  |   |  |   | 2,384 
|                                             |  |                                 |        |                                |      |   |        |  |   |        |   |  |   |       
|Total noninterest income                     |  | $                               | 13,117 |                                |      | $ | 14,159 |  | $ | 38,862 |   |  | $ | 39,675
|                                             |  |                                 |        |                                |      |   |        |  |   |        |   |  |   |       

Noninterest Expense

Noninterest expense totaled $46.2 million for the quarter ended September 30, 2008 compared with $30.1 million for the quarter ended September 30, 2007, an increase of $16.1 million, or 53.7%. Noninterest
expense totaled $106.2 million for the nine months ended September 30, 2008 compared with $87.4 million for the nine months ended September 30, 2007, an increase of $18.8 million, or 21.5%. The increase in both periods was primarily due to
the Company taking a $14.0 million pre-tax impairment charge on the write-down of its Fannie Mae and Freddie Mac perpetual preferred securities and an increase in salaries and employee benefits. The following table presents, for the periods
indicated, the major categories of noninterest expense:



|                                              |  |                                 |        |                                |   |        |  |      |         |  |   |       
|--------------------------------------------- |  | ------------------------------- | ------ | ------------------------------ | - | ------ |  | ---- | ------- |  | - | ------
|                                              |  | Three Months EndedSeptember 30, |        | Nine Months EndedSeptember 30,
|                                              |  | 2008                            |        | 2007                           |   | 2008   |  | 2007
|                                              |  | (Dollars in thousands)         
|Salaries and employee benefits (1)            |  | $                               | 17,526 |                                | $ | 16,365 |  | $    | 50,407  |  | $ | 48,163
|                                              |  |                                 |        |                                |   |        |  |      |         |  |   |       
|Non-staff expenses:                           |  |                                 |        |                                |   |        |  |      |         |  |   |       
|Occupancy and equipment expense               |  |                                 | 3,088  |                                |   | 2,665  |  |      | 8,765   |  |   | 7,759 
|Depreciation                                  |  |                                 | 1,955  |                                |   | 1,895  |  |      | 5,812   |  |   | 5,656 
|Data processing                               |  |                                 | 1,319  |                                |   | 1,290  |  |      | 3,971   |  |   | 3,447 
|Communications expense                        |  |                                 | 1,631  |                                |   | 1,665  |  |      | 4,800   |  |   | 4,639 
|Professional fees                             |  |                                 | 486    |                                |   | 408    |  |      | 1,030   |  |   | 1,244 
|Regulatory assessments and FDIC insurance     |  |                                 | 346    |                                |   | 218    |  |      | 892     |  |   | 756   
|Ad valorem and franchise taxes                |  |                                 | 750    |                                |   | 689    |  |      | 2,111   |  |   | 1,974 
|Core deposit intangibles amortization         |  |                                 | 2,562  |                                |   | 2,586  |  |      | 7,513   |  |   | 7,297 
|Impairment charge on write-down of securities |  |                                 | 14,025 |                                |   |       |  |      | 14,025  |  |   |      
|Other                                         |  |                                 | 2,542  |                                |   | 2,306  |  |      | 6,884   |  |   | 6,495 
|                                              |  |                                 |        |                                |   |        |  |      |         |  |   |       
|Total non-staff expenses                      |  |                                 | 28,704 |                                |   | 13,722 |  |      | 55,803  |  |   | 39,267
|                                              |  |                                 |        |                                |   |        |  |      |         |  |   |       
|Total noninterest expense                     |  | $                               | 46,230 |                                | $ | 30,087 |  | $    | 106,210 |  | $ | 87,430
|                                              |  |                                 |        |                                |   |        |  |      |         |  |   |       



|(1) |  | Includes stock-based compensation expense of $470,000 and $534,000 for the three months ended September 30, 2008 and 2007, respectively, and $1.1 million and $1.5 million for
the nine months ended September 30, 2008 and 2007, respectively.
|--- |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Salaries and employee benefit expenses were $17.5
million for the quarter ended September 30, 2008 compared with $16.4 million for the quarter ended September 30, 2007, an increase of $1.2 million, or 7.1%. For the nine months ended September 30, 2008, salaries and employee benefit
expenses were $50.4 million, an increase of 2.2 million or 4.7% compared with $48.2 million for the nine months ended September 30, 2007. The increase during both periods was principally due to



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##### Table of Contents

routine annual salary increases and incentive programs. The number of full-time equivalent (FTE) associates employed by the Company was 1,366 at
September 30, 2008 and 1,369 at September 30, 2007.

Non-staff expenses increased $15.0 million, or 109.2%, to $28.7 million for
the quarter ended September 30, 2008 compared with $13.7 million during the same period in 2007. Non-staff expenses increased $16.5 million, or 42.1%, to $55.8 million for the nine months ended September 30, 2008 compared to $39.3 million
during the same period in 2007. The increases during both periods were principally due to the Company taking the $14.0 million pre-tax impairment charge and the increase in general operating costs associated with the acquisitions completed in 2007
and 2008.

Income Taxes

Income tax
expense decreased $4.0 million, or 34.5%, to $7.5 million for the quarter ended September 30, 2008 compared with $11.5 million for the same period in 2007. For the nine months ended September 30, 2008, income tax expense totaled $30.7
million, a decrease of $2.6 million or 7.8% compared with $33.3 million for the same period in 2007. Both decreases were primarily attributable to lower pretax net earnings for the quarter and nine months ended September 30, 2008 when compared
to the same periods in 2007. The effective tax rates for the three months ended September 30, 2008 and 2007 and the nine months ended September 30, 2008 and 2007 were 32.8%, 32.6%, 33.2% and 33.2%, respectively.

FINANCIAL CONDITION

Loan Portfolio

Total loans were $3.25 billion at September 30, 2008, an increase of $105.7
million or 3.4% compared with $3.14 billion at December 31, 2007. The increase was primarily due to loans acquired in the 1stChoice
acquisition. At September 30, 2008, loans outstanding acquired from 1stChoice totaled $182.8 million.

The following table summarizes the loan portfolio of the Company by type of loan as of September 30, 2008 and December 31, 2007:



|                                    |  |                        |           |         |                  |   |        |   |           |  |       |  
|----------------------------------- |  | ---------------------- | --------- | ------- | ---------------- | - | ------ | - | --------- |  | ----- | -
|                                    |  | September 30,2008      |           |         | December 31,2007 |  
|                                    |  | Amount                 |           | Percent |                  |   | Amount |   | Percent   | 
|                                    |  | (Dollars in thousands) |          
|Commercial and industrial           |  | $                      | 453,674   |         | 14.0             | % |        | $ | 436,338   |  | 13.9  | %
|Real estate:                        |  |                        |           |         |                  |   |        |   |           |  |       |  
|Construction and land development   |  |                        | 626,443   |         | 19.3             |   |        |   | 683,171   |  | 21.7  |  
|1-4 family residential              |  |                        | 574,583   |         | 17.7             |   |        |   | 526,338   |  | 16.7  |  
|Home equity                         |  |                        | 95,962    |         | 3.0              |   |        |   | 93,877    |  | 3.0   |  
|Commercial mortgages                |  |                        | 1,167,802 |         | 35.9             |   |        |   | 1,075,285 |  | 34.3  |  
|Farmland                            |  |                        | 82,272    |         | 2.5              |   |        |   | 63,873    |  | 2.0   |  
|Multifamily residential             |  |                        | 61,417    |         | 1.9              |   |        |   | 73,424    |  | 2.3   |  
|Agriculture                         |  |                        | 50,851    |         | 1.6              |   |        |   | 50,146    |  | 1.6   |  
|Consumer (net of unearned discount) |  |                        | 119,188   |         | 3.6              |   |        |   | 123,213   |  | 3.9   |  
|Other                               |  |                        | 16,425    |         | 0.5              |   |        |   | 17,306    |  | 0.6   |  
|                                    |  |                        |           |         |                  |   |        |   |           |  |       |  
|Total loans                         |  | $                      | 3,248,617 |         | 100.0            | % |        | $ | 3,142,971 |  | 100.0 | %
|                                    |  |                        |           |         |                  |   |        |   |           |  |       |  

Nonperforming Assets

The Company had $14.5 million in nonperforming assets at September 30, 2008 and $15.4 million in nonperforming assets at December 31, 2007, a decrease of $854,000 or 5.5%. The ratio of nonperforming assets
to loans and other real estate was 0.45% at September 30, 2008 compared with 0.49% at December 31, 2007.

The Company generally
places a loan on nonaccrual status and ceases accruing interest when the payment of principal or interest is delinquent for 90 days, or earlier in some cases if the collection of the principal is deemed unlikely, unless the loan is in the process of
collection and the underlying collateral fully supports the carrying value of the loan. The Company generally charges off all loans before attaining nonaccrual status.



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##### Table of Contents

The following table presents information regarding nonperforming assets as of the dates indicated:



|                                                          |  |                        |        |   |                  |   |        |  
|--------------------------------------------------------- |  | ---------------------- | ------ | - | ---------------- | - | ------ | -
|                                                          |  | September 30,2008      |        |   | December 31,2007 |  
|                                                          |  | (Dollars in thousands) |       
|Nonaccrual loans                                          |  | $                      | 2,757  |   |                  | $ | 1,035  |  
|Restructured loans                                        |  |                        |       |   |                  |   |       |  
|Accruing loans 90 or more days past due                   |  |                        | 4,083  |   |                  |   | 4,092  |  
|                                                          |  |                        |        |   |                  |   |        |  
|Total nonperforming loans                                 |  |                        | 6,840  |   |                  |   | 5,127  |  
|Repossessed assets                                        |  |                        | 158    |   |                  |   | 56     |  
|Other real estate                                         |  |                        | 7,538  |   |                  |   | 10,207 |  
|                                                          |  |                        |        |   |                  |   |        |  
|Total nonperforming assets                                |  | $                      | 14,536 |   |                  | $ | 15,390 |  
|                                                          |  |                        |        |   |                  |   |        |  
|Nonperforming assets to total loans and other real estate |  |                        | 0.45   | % |                  |   | 0.49   | %

Allowance for Credit Losses

Management actively monitors the Companys asset quality and provides specific loss allowances when necessary. Loans are charged-off against the allowance for credit losses when appropriate. Although management
believes it uses the best information available to make determinations with respect to the allowance for credit losses, future adjustments may be necessary if economic conditions differ from the assumptions used in making the initial determinations.
As of September 30, 2008, the allowance for credit losses amounted to $34.0 million, or 1.05% of total loans, compared with $32.5 million, or 1.04% of total loans, at December 31, 2007.

Set forth below is an analysis of the allowance for credit losses for the nine months ended September 30, 2008 and the year ended December 31,
2007:



|                                                        |  |                                                      |           |   |                                              |   |           |  
|------------------------------------------------------- |  | ---------------------------------------------------- | --------- | - | -------------------------------------------- | - | --------- | -
|                                                        |  | As of and for theNine Months EndedSeptember 30, 2008 |           |   | As of and for theYear EndedDecember 31, 2007 |  
|                                                        |  | (Dollars in thousands)                               |          
|Average loans outstanding                               |  | $                                                    | 3,212,176 |   |                                              | $ | 3,092,797 |  
|                                                        |  |                                                      |           |   |                                              |   |           |  
|Gross loans outstanding at end of period                |  | $                                                    | 3,248,617 |   |                                              | $ | 3,142,971 |  
|                                                        |  |                                                      |           |   |                                              |   |           |  
|Allowance for credit losses at beginning of period      |  | $                                                    | 32,543    |   |                                              | $ | 23,990    |  
|Balance acquired with acquisitions                      |  |                                                      | 2,182     |   |                                              |   | 13,386    |  
|Provision for credit losses                             |  |                                                      | 3,867     |   |                                              |   | 760       |  
|Charge-offs:                                            |  |                                                      |           |   |                                              |   |           |  
|Commercial and industrial                               |  |                                                      | (1,206    | ) |                                              |   | (1,045    | )
|Real estate and agriculture                             |  |                                                      | (2,727    | ) |                                              |   | (4,143    | )
|Consumer                                                |  |                                                      | (1,927    | ) |                                              |   | (2,974    | )
|Recoveries:                                             |  |                                                      |           |   |                                              |   |           |  
|Commercial and industrial                               |  |                                                      | 264       |   |                                              |   | 1,175     |  
|Real estate and agriculture                             |  |                                                      | 179       |   |                                              |   | 208       |  
|Consumer                                                |  |                                                      | 806       |   |                                              |   | 1,186     |  
|                                                        |  |                                                      |           |   |                                              |   |           |  
|Net charge-offs                                         |  |                                                      | (4,611    | ) |                                              |   | (5,593    | )
|                                                        |  |                                                      |           |   |                                              |   |           |  
|Allowance for credit losses at end of period            |  | $                                                    | 33,981    |   |                                              | $ | 32,543    |  
|                                                        |  |                                                      |           |   |                                              |   |           |  
|Ratio of allowance to end of period loans               |  |                                                      | 1.05      | % |                                              |   | 1.04      | %
|Ratio of net charge-offs to average loans (annualized)  |  |                                                      | 0.19      | % |                                              |   | 0.18      | %
|Ratio of allowance to end of period nonperforming loans |  |                                                      | 496.8     | % |                                              |   | 634.7     | %



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##### Table of Contents

Securities

Carrying cost of securities totaled $2.29 billion at September 30, 2008 compared with $1.86
billion at December 31, 2007, an increase of $436.8 million or 23.5%. The increase was principally due to securities acquired in the 1stChoice
acquisition. At September 30, 2008, securities represented 33.8% of total assets compared with 29.2% of total assets at December 31, 2007.

The following table summarizes the amortized cost of securities as of the dates shown (available-for-sale securities are not adjusted for unrealized gains or losses):



|                                                                     |  |                   |           |                  |   |          
|-------------------------------------------------------------------- |  | ----------------- | --------- | ---------------- | - | ---------
|                                                                     |  | September 30,2008 |           | December 31,2007
|                                                                     |  | (In thousands)   
|U.S. Treasury securities and obligations of U.S. government agencies |  | $                 | 65,829    |                  | $ | 229,119  
|70% nontaxable preferred stock                                       |  |                   |          |                  |   | 14,025   
|States and political subdivisions                                    |  |                   | 84,527    |                  |   | 87,517   
|Corporate debt securities                                            |  |                   | 3,220     |                  |   | 3,215    
|Collateralized mortgage obligations                                  |  |                   | 188,899   |                  |   | 223,952  
|Mortgage-backed securities                                           |  |                   | 1,935,419 |                  |   | 1,282,338
|Qualified Zone Academy Bond (QZAB)                                   |  |                   | 8,000     |                  |   | 8,000    
|Equity securities                                                    |  |                   | 7,288     |                  |   | 7,260    
|                                                                     |  |                   |           |                  |   |          
|Total amortized cost                                                 |  | $                 | 2,293,182 |                  | $ | 1,855,426
|                                                                     |  |                   |           |                  |   |          
|Total fair value                                                     |  | $                 | 2,313,910 |                  | $ | 1,858,042
|                                                                     |  |                   |           |                  |   |          

In the third quarter of 2008, as a result of actions taken in September 2008 by the Treasury
Department and FHFA with respect to Fannie Mae and Freddie Mac, the Company recorded an other-than-temporary impairment write-down on its Fannie Mae and Freddie Mac perpetual preferred stock, included in the table above as 70% nontaxable preferred
stock, of $14.0 million pre-tax ($9.1 million after-tax) which represents the Companys full carrying cost of its investment.

Declines in the fair value of held-to-maturity and available-for-sale securities below their cost that are deemed to be other than temporary are reflected in earnings as realized losses. In estimating other-than-temporary impairment losses,
management considers, among other things, (i) the length of time and the extent to which the fair value has been less than cost, (ii) the financial condition and near-term prospects of the issuer, and (iii) the intent and ability of
the Company to retain its investment in the issuer for a period of time sufficient to allow for any anticipated recovery in fair value.

Management has the ability and intent to hold the securities classified as held to maturity until they mature, at which time the Company will receive full value for the securities. Further, management has the ability and intent to hold the
securities classified as available for sale that were in a loss position as of September 30, 2008 for a period of time sufficient for a recovery of cost. Management has determined the unrealized losses are largely due to increases in market
interest rates over the yields available at the time the underlying securities were purchased and expects the fair value to recover as the securities approach their maturity date or repricing date or if market yields for such investments decline.
Management has determined none of the Companys securities are impaired due to reasons of credit quality. Accordingly, as of September 30, 2008, management has determined any impairment in the Companys securities is temporary and no
impairment loss has been realized in the Companys consolidated income statement other than the $14.0 million pre-tax charge related to the Companys Fannie Mae and Freddie Mac perpetual preferred stock described above.

Bank Premises and Equipment

Premises and equipment, net of accumulated depreciation, totaled $123.8 million and $120.0 million at September 30, 2008 and December 31, 2007, respectively, an increase of $3.8 million or 3.2%. The increase
was primarily due to banking centers added from the acquisition of 1stChoice and the six branches of Banco Popular.

Deposits

Total deposits were $5.10 billion at
September 30, 2008 compared with $4.97 billion at December 31, 2007, an increase of $138.4 million or 2.8%. The increase was primarily due to deposits assumed in the acquisition of six branches of



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##### Table of Contents

Banco Popular and 1stChoice. At September 30,
2008, deposits attributed to these two acquisitions totaled $381.0 million. At September 30, 2008, noninterest-bearing deposits accounted for approximately 24.8% of total deposits compared with 23.5% of total deposits at December 31, 2007.
Interest-bearing demand deposits totaled $3.84 billion or 75.2% of total deposits at September 30, 2008 compared with $3.80 billion or 76.5% of total deposits at December 31, 2007.

The following table summarizes the daily average balances and weighted average rates paid on deposits for the periods presented below:



|                                |  |                                    |           |             |                            |   |                |   |             |  |      |  
|------------------------------- |  | ---------------------------------- | --------- | ----------- | -------------------------- | - | -------------- | - | ----------- |  | ---- | -
|                                |  | Nine Months EndedSeptember 30,2008 |           |             | Year EndedDecember 31,2007 |  
|                                |  | AverageBalance                     |           | AverageRate |                            |   | AverageBalance |   | AverageRate | 
|                                |  | (Dollars in thousands)             |          
|Interest-bearing demand         |  | $                                  | 775,730   |             | 1.09                       | % |                | $ | 829,757     |  | 1.97 | %
|Regular savings                 |  |                                    | 242,431   |             | 0.75                       |   |                |   | 222,397     |  | 0.99 |  
|Money market savings            |  |                                    | 1,112,263 |             | 2.34                       |   |                |   | 983,187     |  | 3.34 |  
|Time deposits                   |  |                                    | 1,712,402 |             | 3.96                       |   |                |   | 1,549,064   |  | 4.60 |  
|                                |  |                                    |           |             |                            |   |                |   |             |  |      |  
|Total interest-bearing deposits |  |                                    | 3,842,826 |             | 2.71                       |   |                |   | 3,584,405   |  | 3.42 |  
|Noninterest-bearing deposits    |  |                                    | 1,212,379 |             |                           |   |                |   | 1,143,114   |  |     |  
|                                |  |                                    |           |             |                            |   |                |   |             |  |      |  
|Total deposits                  |  | $                                  | 5,055,205 |             | 2.06                       | % |                | $ | 4,727,519   |  | 2.60 | %
|                                |  |                                    |           |             |                            |   |                |   |             |  |      |  

Other Borrowings

The Company utilizes borrowings to supplement deposits to fund its lending and investment activities. Borrowings consist of funds from the Federal Home Loan Bank (FHLB) and correspondent banks. FHLB
advances are considered short-term, overnight borrowings. At September 30, 2008, the Company had $219.7 million in FHLB borrowings, of which $190.0 million consisted of FHLB advances and $29.7 million consisted of long-term FHLB notes payable
compared with $31.5 million in FHLB borrowings at December 31, 2007, all of which consisted of long-term FHLB notes payable. The $188.2 million increase was primarily attributable to the $190.0 million outstanding FHLB advance. The maturity
dates on the FHLB notes payable range from the years 2009 to 2028 and have interest rates ranging from 3.08% to 6.12%. The highest outstanding balance of FHLB advances during the nine months ended September 30, 2008 was $280.0 million compared
with $240.0 million during the year ended December 31, 2007. The Company had no federal funds purchased at September 30, 2008 or December 31, 2007.

At September 30, 2008, the Company had $100.3 million in securities sold under repurchase agreements compared with $84.6 million at December 31, 2007, an increase of $15.7 million or 18.6%. The increase was
primarily due to normal customer activity.

The following table presents the Companys borrowings at September 30, 2008 and
December 31, 2007:



|                                            |  |                   |         |                  |   |        
|------------------------------------------- |  | ----------------- | ------- | ---------------- | - | -------
|                                            |  | September 30,2008 |         | December 31,2007
|                                            |  | (In thousands)   
|FHLB advances                               |  | $                 | 190,000 |                  | $ |       
|FHLB long-term notes payable                |  |                   | 29,671  |                  |   | 31,466 
|                                            |  |                   |         |                  |   |        
|Total other borrowings                      |  |                   | 219,671 |                  |   | 31,466 
|Securities sold under repurchase agreements |  |                   | 100,310 |                  |   | 84,581 
|                                            |  |                   |         |                  |   |        
|Total                                       |  | $                 | 319,981 |                  | $ | 116,047
|                                            |  |                   |         |                  |   |        

Junior Subordinated Debentures

At September 30, 2008 and December 31, 2007, the Company had outstanding $92.3 million and $112.9 million, respectively, in junior subordinated
debentures issued to the Companys unconsolidated subsidiary trusts. The decrease of $20.6 million was due to the Companys redemption of $10.3 million in junior subordinated debentures issued to each of SNB Statutory Trust II and SNB
Capital Trust III on June 26, 2008 and April 7, 2008, respectively. Each issue of debentures



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redeemed bore interest at a floating rate of 3 month LIBOR + 3.15%. The trusts in turn redeemed in full the trust preferred securities and common securities
they issued.

A summary of pertinent information related to the Companys eight issues of junior subordinated debentures outstanding
at September 30, 2008 is set forth in the table below:



|                               |  |                |  |                                     |            |                  |                                             |                                      |   |                  |  |               
|------------------------------ |  | -------------- |  | ----------------------------------- | ---------- | ---------------- | ------------------------------------------- | ------------------------------------ | - | ---------------- |  | --------------
|Description                    |  | Issuance Date  |  | TrustPreferredSecuritiesOutstanding |            | Interest Rate(1) |                                             | JuniorSubordinatedDebt Owed toTrusts |   | Maturity Date(2)
|Prosperity Statutory Trust II  |  | July 31, 2001  |  | $                                   | 15,000,000 |                  | 3 month LIBOR + 3.58%, not to exceed 12.50% |                                      | $ | 15,464,000       |  | July 31, 2031 
|Prosperity Statutory Trust III |  | Aug. 15, 2003  |  |                                     | 12,500,000 |                  | 3 month LIBOR +3.00%(3)                     |                                      |   | 12,887,000       |  | Sept. 17, 2033
|Prosperity Statutory Trust IV  |  | Dec. 30, 2003  |  |                                     | 12,500,000 |                  | 6.50%(4)                                    |                                      |   | 12,887,000       |  | Dec. 30, 2033 
|SNB Capital Trust IV(5)        |  | Sept. 25, 2003 |  |                                     | 10,000,000 |                  | 3 month LIBOR +3.00%                        |                                      |   | 10,310,000       |  | Sept. 25, 2033
|TXUI Statutory Trust I(6)      |  | Sept. 07, 2000 |  |                                     | 7,000,000  |                  | 10.60%                                      |                                      |   | 7,210,000        |  | Sept. 07, 2030
|TXUI Statutory Trust II(6)     |  | Dec. 19, 2003  |  |                                     | 5,000,000  |                  | 6.45%(7)                                    |                                      |   | 5,155,000        |  | Dec. 19, 2033 
|TXUI Statutory Trust III(6)    |  | Nov. 30, 2005  |  |                                     | 15,500,000 |                  | 3 month LIBOR +1.39%                        |                                      |   | 15,980,000       |  | Dec. 15, 2035 
|TXUI Statutory Trust IV(6)     |  | Mar. 31, 2006  |  |                                     | 12,000,000 |                  | 3 month LIBOR +1.39%                        |                                      |   | 12,372,000       |  | June 30, 2036 



|(1) |  | The 3-month LIBOR in effect as of September 30, 2008 was 4.05%.
|--- |  | ---------------------------------------------------------------

|(2) |  | All debentures are callable five years from issuance date except for TXUI Statutory Trust I which is callable ten years from issuance date.
|--- |  | -------------------------------------------------------------------------------------------------------------------------------------------

|(3) |  | The debentures bore a fixed interest rate of 6.50% until September 17, 2008, when the rate began to float on a quarterly basis based on the three-month LIBOR plus 3.00%.
|--- |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|(4) |  | The debentures bear a fixed interest rate until December 30, 2008, when the rate begins to float on a quarterly basis based on the three-month LIBOR plus 2.85%.
|--- |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------

|(5) |  | Assumed in connection with the SNB acquisition on April 1, 2006.
|--- |  | ----------------------------------------------------------------

|(6) |  | Assumed in connection with the TXUI acquisition on January 31, 2007.
|--- |  | --------------------------------------------------------------------

|(7) |  | The debentures bear a fixed interest rate until December 19, 2008, when the rate begins to float on a quarterly basis based on the three-month LIBOR plus 2.85%.
|--- |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------

Liquidity

Liquidity
involves the Companys ability to raise funds to support asset growth or reduce assets to meet deposit withdrawals and other payment obligations, to maintain reserve requirements and otherwise to operate the Company on an ongoing basis. The
Companys liquidity needs have primarily been met by growth in core deposits and the issuance of junior subordinated debentures. Although access to purchased funds from correspondent banks is available and has been utilized on occasion to take
advantage of investment opportunities, the Company does not generally rely on these external funding sources. The cash and federal funds sold position, supplemented by amortizing investment and loan portfolios, have generally created an adequate
liquidity position.



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##### Table of Contents

Asset liquidity is provided by cash and assets which are readily marketable or which will mature in the
near future. As of September 30, 2008, the Company had cash and cash equivalents of $184.9 million compared with $371.1 million at December 31, 2007. The decrease of $186.2 million is primarily related to a reduction in federal funds sold
of $167.3 million.

Contractual Obligations

The following table summarizes the Companys contractual obligations and other commitments to make future payments as of September 30, 2008 (other than deposit obligations). The Companys future cash payments associated with
its contractual obligations pursuant to its junior subordinated debentures, FHLB notes payable and operating leases as of September 30, 2008 are summarized below. Payments for FHLB notes payable includes interest of $6.9 million that will be
paid over the future periods presented. Payments related to leases are based on actual payments specified in underlying contracts.



|                                     |  |                      |       |                 |   |                 |  |            |       |       |   |         |  |   |        
|------------------------------------ |  | -------------------- | ----- | --------------- | - | --------------- |  | ---------- | ----- | ----- | - | ------- |  | - | -------
|                                     |  | Payments due in:    
|                                     |  | RemainingFiscal 2008 |       | Fiscal2009-2010 |   | Fiscal2011-2012 |  | Thereafter |       | Total
|                                     |  | (In thousands)      
|Junior subordinated debentures       |  | $                    |      |                 | $ |                |  | $          |      |       | $ | 92,265  |  | $ | 92,265 
|Federal Home Loan Bank notes payable |  |                      | 448   |                 |   | 17,621          |  |            | 4,013 |       |   | 14,440  |  |   | 36,522 
|Operating leases                     |  |                      | 889   |                 |   | 5,412           |  |            | 2,975 |       |   | 2,688   |  |   | 11,964 
|                                     |  |                      |       |                 |   |                 |  |            |       |       |   |         |  |   |        
|Total                                |  | $                    | 1,337 |                 | $ | 23,033          |  | $          | 6,988 |       | $ | 109,393 |  | $ | 140,751
|                                     |  |                      |       |                 |   |                 |  |            |       |       |   |         |  |   |        

Off-Balance Sheet Items

In the normal course of business, the Company enters into various transactions, which, in accordance with accounting principles generally accepted in the United States, are not included in its consolidated balance
sheets. The Company enters into these transactions to meet the financing needs of its customers. These transactions include commitments to extend credit and standby letters of credit, which involve, to varying degrees, elements of credit risk and
interest rate risk in excess of the amounts recognized in the consolidated balance sheets.

The Companys commitments associated with
outstanding standby letters of credit and commitments to extend credit as of September 30, 2008 are summarized below. Since commitments associated with letters of credit and commitments to extend credit may expire unused, the amounts shown do
not necessarily reflect the actual future cash funding requirements.



|                             |  |                      |         |                 |   |                 |  |            |       |       |   |        |  |   |        
|---------------------------- |  | -------------------- | ------- | --------------- | - | --------------- |  | ---------- | ----- | ----- | - | ------ |  | - | -------
|                             |  | RemainingFiscal 2008 |         | Fiscal2009-2010 |   | Fiscal2011-2012 |  | Thereafter |       | Total
|                             |  | (In thousands)      
|Standby letters of credit    |  | $                    | 14,315  |                 | $ | 12,206          |  | $          | 962   |       | $ | 347    |  | $ | 27,830 
|Commitments to extend credit |  |                      | 190,848 |                 |   | 341,224         |  |            | 8,477 |       |   | 98,708 |  |   | 639,257
|                             |  |                      |         |                 |   |                 |  |            |       |       |   |        |  |   |        
|Total                        |  | $                    | 205,163 |                 | $ | 353,430         |  | $          | 9,439 |       | $ | 99,055 |  | $ | 667,087
|                             |  |                      |         |                 |   |                 |  |            |       |       |   |        |  |   |        

Capital Resources

Total shareholders equity was $1.23 billion at September 30, 2008 compared with $1.13
billion at December 31, 2007, an increase of $101.7 million or 9.0%. The increase was due primarily to net earnings of $61.8 million, the issuance of common stock in connection with the 1stChoice acquisition of $56.1 million and the issuance of common stock in connection with the exercise of stock options of $2.5 million, partially offset by dividends paid of $17.0
million for the nine months ended September 30, 2008.

Both the Board of Governors of the Federal Reserve System with respect to the
Company, and the Federal Deposit Insurance Corporation (FDIC) with respect to the Bank, have established certain minimum risk-based capital standards that apply to bank holding companies and federally insured banks. The following table
sets forth the Companys total risk-based capital, Tier 1 risk-based capital, and Tier 1 to average assets (leverage) ratios as of September 30, 2008:



|                                         |  |       |  
|---------------------------------------- |  | ----- | -
|Consolidated Capital Ratios:             |  |       |  
|Total capital (to risk weighted assets)  |  | 14.21 | %
|Tier 1 capital (to risk weighted assets) |  | 13.24 | %
|Tier 1 capital (to average assets)       |  | 7.75  | %



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As of September 30, 2008, the Banks risk-based capital ratios were above the levels required
for the Bank to be designated as well capitalized by the FDIC. The following table sets forth the Banks total risk-based capital, Tier 1 risk-based capital, and Tier 1 to average assets (leverage) capital ratios as of
September 30, 2008:



|                                         |  |       |  
|---------------------------------------- |  | ----- | -
|Capital Ratios (Bank Only):              |  |       |  
|Total capital (to risk weighted assets)  |  | 13.62 | %
|Tier 1 capital (to risk weighted assets) |  | 12.64 | %
|Tier 1 capital (to average assets)       |  | 7.39  | %

ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES
ABOUT MARKET RISK

The Company manages market risk, which for the Company is primarily interest rate risk, through its Asset Liability
Committee which is composed of senior officers of the Company, in accordance with policies approved by the Companys Board of Directors.

The Company uses simulation analysis to examine the potential effects of market changes on net interest income and market value. The Company considers macroeconomic variables, Company strategy, liquidity and other factors as it quantifies
market risk. See the Companys Annual Report on Form 10-K, Item 7 Managements Discussion and Analysis of Financial Condition and Results of Operations-Interest Rate Sensitivity and Liquidity which was filed on
February 29, 2008 for further discussion.

ITEM 4. CONTROLS AND PROCEDURES

Evaluation of disclosure controls and procedures.As of the end of the period covered by this report, the Company carried out an evaluation,
under the supervision and with the participation of its management, including its Chief Executive Officer and Chief Financial Officer, of the effectiveness of the design and operation of its disclosure controls and procedures. In designing and
evaluating the disclosure controls and procedures, management recognizes that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objectives, and management
was required to apply judgment in evaluating its controls and procedures. Based on this evaluation, the Companys Chief Executive Officer and Chief Financial Officer concluded that the Companys disclosure controls and procedures (as
defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934 (the Exchange Act)) were effective as of the end of the period covered by this report.

Changes in internal control over financial reporting. There were no changes in the Companys internal control over financial reporting (as
such term is defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act) during the quarter ended September 30, 2008 that have materially affected, or are reasonably likely to materially affect, the Companys internal control
over financial reporting.

PART II  OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS

Not Applicable

ITEM 1A. RISK FACTORS

Except for the addition of the risk factors described below, there has been no material change in the risk factors previously disclosed under Item
1A. Risk Factors of the Companys 2007 Annual Report on Form 10-K for the year ended December 31, 2007 filed with the Securities and Exchange Commission on February 29, 2008.

The current economic environment poses significant challenges for the Company and could adversely affect its financial condition and results of operations.

The Company is operating in a challenging and uncertain economic environment, including generally uncertain conditions nationally and
locally in its markets. Financial institutions continue to be affected by declines in the real estate market and constrained financial markets. The Company retains direct exposure to the residential and commercial real estate markets, and it is
affected by these events. Continued declines in real estate values, home sales volumes and financial stress on borrowers as a result of the uncertain economic environment, including job losses, could have an adverse affect on the Companys
borrowers



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or their customers, which could adversely affect the Companys financial conditions and results of operations. In addition, a possible national economic
recession or further deterioration in local economic conditions in the Companys markets could drive losses beyond that which is provided for in its allowance for loan losses and result in the following consequences:



| |  |  | increases in loan delinquencies;
| | - |  | --------------------------------



| |  |  | increases in nonperforming assets and foreclosures;
| | - |  | ---------------------------------------------------



| |  |  | decreases in demand for the Companys products and services, which could adversely affect its liquidity position; and
| | - |  | ---------------------------------------------------------------------------------------------------------------------



| |  |  | decreases in the value of the collateral securing the Companys loans, especially real estate, which could reduce customers borrowing power.
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------

Treasury and the FDIC have initiated programs to address economic stabilization, yet the efficacy of these programs in
stabilizing the economy and the banking system at large are uncertain. Further, details as to the Companys participation or access to such programs and their subsequent impact on the Companys business, prospects, financial condition and
results of operation remain uncertain.

Current levels of market volatility are unprecedented and could adversely impact the Companys results of
operation and access to capital.

The capital and credit markets have been experiencing volatility and disruption for more than 12
months. In recent weeks, the volatility and disruption has reached unprecedented levels. In some cases, the markets have produced downward pressure on stock prices and credit capacity for certain issuers without regard to those issuers
underlying financial strength. If the current levels of market disruption and volatility continue or worsen, there can be no assurance that the Company will not experience further adverse effects, which may be material, on its ability to access
capital and on its results of operations.

ITEM 2. UNREGISTERED SALES OF EQUITY SECURITIES
AND USE OF PROCEEDS



| | a. |  | Not applicable
| | -- |  | --------------

| | b. |  | Not applicable
| | -- |  | --------------

| | c. |  | Not applicable
| | -- |  | --------------

ITEM 3. DEFAULTS UPON SENIOR SECURITIES

Not applicable

ITEM 4. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS

Not applicable

ITEM 5. OTHER INFORMATION

Not applicable

ITEM 6. EXHIBITS



| | a. |  | Exhibits:
| | -- |  | ---------



|               |  |                                                                                                                                                                                                                                                
|-------------- |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|Exhibit Number |  | Description of Exhibit                                                                                                                                                                                                                         
|3.1            |  | Amended and Restated Articles of Incorporation of Prosperity Bancshares, Inc. (incorporated herein by reference to Exhibit 3.1 to the Companys Registration Statement on Form S-1
(Registration No. 333-63267) (the Registration Statement))
|               | 
|3.2            |  | Articles of Amendment to Amended and Restated Articles of Incorporation of Prosperity Bancshares, Inc. (incorporated herein by reference to Exhibit 3.2 to the Companys Quarterly Report
on Form 10-Q for the quarter ended March 31, 2006)   



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|     |    |  |                                                                                                                                                                                   
|---- | -- |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|3.3  |    |  | Amended and Restated Bylaws of Prosperity Bancshares, Inc. (incorporated herein by reference to Exhibit 3.1 to the Companys Current Report on Form 8-K filed on October 19,
2007)
|     |   
|4.1  |    |  | Form of certificate representing shares of the Companys common stock (incorporated by reference to Exhibit 4 to the Registration Statement)                                      
|     |   
|31.1 | *  |  | Certification of the Chief Executive Officer pursuant to Rule 13a-14(a) of the Securities Exchange Act of 1934, as amended                                                        
|     |   
|31.2 | *  |  | Certification of the Chief Financial Officer pursuant to Rule 13a-14(a) of the Securities Exchange Act of 1934, as amended                                                        
|     |   
|32.1 | ** |  | Certification of the Chief Executive Officer pursuant to 18 U.S.C. Section 1350, adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002                                
|     |   
|32.2 | ** |  | Certification of the Chief Financial Officer pursuant to 18 U.S.C. Section 1350, adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002                                



|* |  | Filed with this Quarterly Report on Form 10-Q.
|- |  | ----------------------------------------------

|** |  | Furnished with this Quarterly Report on Form 10-Q.
|-- |  | --------------------------------------------------



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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the
undersigned thereunto duly authorized.



| |  |                               |  |                                     
| |  | ----------------------------- |  | ------------------------------------
| |  | PROSPERITY BANCSHARES, INC.SM
| |  | (Registrant)                 
| |  |                              
| |  | Date: 11/06/08                |  | /s/ David Zalman                    
| |  |                               |  | David Zalman                        
| |  |                               |  | Chairman and Chief Executive Officer
| |  |                              
| |  | Date: 11/06/08                |  | /s/ David Hollaway                  
| |  |                               |  | David Hollaway                      
| |  |                               |  | Chief Financial Officer             



35