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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, 2009

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 has submitted electronically and posted on its
corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such
files).    Yes   ̈    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   |  |  ̈  (Do not check if a smaller reporting company) |  | 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, 2009, there were 46,395,329 outstanding 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



|                               |  |                                                                                                                                                                        |  |   
|------------------------------ |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------- |  | --
|                               |  | Page                                                                                                                                                                  
|PART I  FINANCIAL INFORMATION |  |                                                                                                                                                                       
|                               |  |                                                                                                                                                                       
|Item 1.                        |  | Financial Statements                                                                                                                                                   |  | 3 
|                               |  |                                                                                                                                                                       
|                               |  | Condensed Consolidated Balance Sheets as of September 30, 2009 and December 31, 2008
(unaudited)                                                                       |  | 3 
|                               |  | Condensed Consolidated Statements of Income for the Three and Nine Months Ended September 30, 2009 and 2008
 (unaudited)                                               |  | 4 
|                               |  | Condensed Consolidated Statements of Changes in Shareholders Equity for the Year Ended December 31, 2008
and for the Nine Months Ended September 30, 2009 (unaudited) |  | 5 
|                               |  | Condensed Consolidated Statements of Cash Flows for the Nine Months Ended September 30, 2009 and 2008 (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                                                                                  |  | 18
|                               |  |                                                                                                                                                                       
|Item 3.                        |  | Quantitative and Qualitative Disclosures about Market Risk                                                                                                             |  | 34
|                               |  |                                                                                                                                                                       
|Item 4.                        |  | Controls and Procedures                                                                                                                                                |  | 34
|                               | 
|PART II  OTHER INFORMATION    |  |                                                                                                                                                                       
|                               |  |                                                                                                                                                                       
|Item 1.                        |  | Legal Proceedings                                                                                                                                                      |  | 35
|                               |  |                                                                                                                                                                       
|Item 1A.                       |  | Risk Factors                                                                                                                                                           |  | 35
|                               |  |                                                                                                                                                                       
|Item 2.                        |  | Unregistered Sales of Equity Securities and Use of Proceeds                                                                                                            |  | 35
|                               |  |                                                                                                                                                                       
|Item 3.                        |  | Defaults upon Senior Securities                                                                                                                                        |  | 35
|                               |  |                                                                                                                                                                       
|Item 4.                        |  | Submission of Matters to a Vote of Security Holders                                                                                                                    |  | 35
|                               |  |                                                                                                                                                                       
|Item 5.                        |  | Other Information                                                                                                                                                      |  | 35
|                               |  |                                                                                                                                                                       
|Item 6.                        |  | Exhibits                                                                                                                                                               |  | 35
|                               | 
|Signatures                     |  | 36                                                                                                                                                                    



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 30,2009                 |           |   | December 31,2008 |  
|                                                                                                                                                                                                                                                                     |  | (In thousands, except share data) |          
|ASSETS                                                                                                                                                                                                                                                               |  |                                   |           |   |                  |   |           |  
|Cash and due from banks                                                                                                                                                                                                                                              |  | $                                 | 120,932   |   |                  | $ | 212,335   |  
|Federal funds sold                                                                                                                                                                                                                                                   |  |                                   | 35,930    |   |                  |   | 16,298    |  
|                                                                                                                                                                                                                                                                     |  |                                   |           |   |                  |   |           |  
|Total cash and cash equivalents                                                                                                                                                                                                                                      |  |                                   | 156,862   |   |                  |   | 228,633   |  
|Interest bearing deposits in financial institutions                                                                                                                                                                                                                  |  |                                   |          |   |                  |   | 106       |  
|Securities available for sale, at fair value (amortized cost of $603,828 and $802,086, respectively)                                                                                                                                                                 |  |                                   | 630,517   |   |                  |   | 817,244   |  
|Securities held to maturity, at cost (fair value of $3,741,212 and $3,408,981, respectively)                                                                                                                                                                         |  |                                   | 3,624,540 |   |                  |   | 3,343,157 |  
|Loans held for investment                                                                                                                                                                                                                                            |  |                                   | 3,406,137 |   |                  |   | 3,566,958 |  
|Loans held for sale                                                                                                                                                                                                                                                  |  |                                   |          |   |                  |   | 99        |  
|Allowance for credit losses                                                                                                                                                                                                                                          |  |                                   | (47,312   | ) |                  |   | (36,970   | )
|                                                                                                                                                                                                                                                                     |  |                                   |           |   |                  |   |           |  
|Loans, net                                                                                                                                                                                                                                                           |  |                                   | 3,358,825 |   |                  |   | 3,530,087 |  
|Accrued interest receivable                                                                                                                                                                                                                                          |  |                                   | 31,197    |   |                  |   | 34,617    |  
|Goodwill                                                                                                                                                                                                                                                             |  |                                   | 876,958   |   |                  |   | 874,654   |  
|Core deposit intangibles, net of accumulated amortization of $38,922 and $31,287, respectively                                                                                                                                                                       |  |                                   | 37,825    |   |                  |   | 38,196    |  
|Bank premises and equipment, net                                                                                                                                                                                                                                     |  |                                   | 149,725   |   |                  |   | 123,638   |  
|Other real estate owned                                                                                                                                                                                                                                              |  |                                   | 12,738    |   |                  |   | 4,450     |  
|Bank Owned Life Insurance (BOLI)                                                                                                                                                                                                                                     |  |                                   | 47,761    |   |                  |   | 46,794    |  
|Federal Home Loan Bank stock                                                                                                                                                                                                                                         |  |                                   | 18,306    |   |                  |   | 15,483    |  
|Leased assets                                                                                                                                                                                                                                                        |  |                                   | 505       |   |                  |   | 928       |  
|Other assets                                                                                                                                                                                                                                                         |  |                                   | 11,573    |   |                  |   | 14,377    |  
|                                                                                                                                                                                                                                                                     |  |                                   |           |   |                  |   |           |  
|TOTAL ASSETS                                                                                                                                                                                                                                                         |  | $                                 | 8,957,332 |   |                  | $ | 9,072,364 |  
|                                                                                                                                                                                                                                                                     |  |                                   |           |   |                  |   |           |  
|LIABILITIES AND SHAREHOLDERS EQUITY                                                                                                                                                                                                                                 |  |                                   |           |   |                  |   |           |  
|LIABILITIES:                                                                                                                                                                                                                                                         |  |                                   |           |   |                  |   |           |  
|Deposits:                                                                                                                                                                                                                                                            |  |                                   |           |   |                  |   |           |  
|Noninterest-bearing                                                                                                                                                                                                                                                  |  | $                                 | 1,473,189 |   |                  | $ | 1,522,983 |  
|Interest-bearing                                                                                                                                                                                                                                                     |  |                                   | 5,644,804 |   |                  |   | 5,780,314 |  
|                                                                                                                                                                                                                                                                     |  |                                   |           |   |                  |   |           |  
|Total deposits                                                                                                                                                                                                                                                       |  |                                   | 7,117,993 |   |                  |   | 7,303,297 |  
|Other borrowings                                                                                                                                                                                                                                                     |  |                                   | 253,855   |   |                  |   | 229,395   |  
|Securities sold under repurchase agreements                                                                                                                                                                                                                          |  |                                   | 100,636   |   |                  |   | 96,017    |  
|Accrued interest payable                                                                                                                                                                                                                                             |  |                                   | 8,169     |   |                  |   | 14,625    |  
|Other liabilities                                                                                                                                                                                                                                                    |  |                                   | 57,379    |   |                  |   | 81,659    |  
|Junior subordinated debentures                                                                                                                                                                                                                                       |  |                                   | 92,265    |   |                  |   | 92,265    |  
|                                                                                                                                                                                                                                                                     |  |                                   |           |   |                  |   |           |  
|Total liabilities                                                                                                                                                                                                                                                    |  |                                   | 7,630,297 |   |                  |   | 7,817,258 |  
|                                                                                                                                                                                                                                                                     |  |                                   |           |   |                  |   |           |  
|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; 46,189,990 and 46,116,801 shares issued at September 30, 2009 and
December 31, 2008, respectively; 46,152,902 and 46,079,713 shares outstanding at September 30, 2009 and December 31, 2008, respectively |  |                                   | 46,190    |   |                  |   | 46,117    |  
|Capital surplus                                                                                                                                                                                                                                                      |  |                                   | 869,451   |   |                  |   | 867,380   |  
|Retained earnings                                                                                                                                                                                                                                                    |  |                                   | 394,654   |   |                  |   | 332,363   |  
|Accumulated other comprehensive income  net unrealized gain on available for sale securities, net of tax of $9,341 and
$5,305, respectively                                                                                                                         |  |                                   | 17,347    |   |                  |   | 9,853     |  
|Less treasury stock, at cost, 37,088 shares                                                                                                                                                                                                                          |  |                                   | (607      | ) |                  |   | (607      | )
|                                                                                                                                                                                                                                                                     |  |                                   |           |   |                  |   |           |  
|Total shareholders equity                                                                                                                                                                                                                                           |  |                                   | 1,327,035 |   |                  |   | 1,255,106 |  
|                                                                                                                                                                                                                                                                     |  |                                   |           |   |                  |   |           |  
|TOTAL LIABILITIES AND SHAREHOLDERS EQUITY                                                                                                                                                                                                                           |  | $                                 | 8,957,332 |   |                  | $ | 9,072,364 |  
|                                                                                                                                                                                                                                                                     |  |                                   |           |   |                  |   |           |  

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,
|                                                      |  | 2009                                          |         | 2008                           |   | 2009   |  | 2008
|                                                      |  | (Dollars in thousands, except per share data)
|INTEREST INCOME:                                      |  |                                               |         |                                |   |        |  |      |         |  |   |        
|Loans, including fees                                 |  | $                                             | 54,809  |                                | $ | 56,925 |  | $    | 165,859 |  | $ | 171,393
|Securities                                            |  |                                               | 46,812  |                                |   | 27,834 |  |      | 143,990 |  |   | 78,473 
|Federal funds sold                                    |  |                                               | 74      |                                |   | 84     |  |      | 180     |  |   | 1,418  
|Deposits in financial institutions                    |  |                                               |        |                                |   | 3      |  |      |        |  |   | 6      
|                                                      |  |                                               |         |                                |   |        |  |      |         |  |   |        
|Total interest income                                 |  |                                               | 101,695 |                                |   | 84,846 |  |      | 310,029 |  |   | 251,290
|                                                      |  |                                               |         |                                |   |        |  |      |         |  |   |        
|                                                      |  |                                               |         |                               
|INTEREST EXPENSE:                                     |  |                                               |         |                                |   |        |  |      |         |  |   |        
|Deposits                                              |  |                                               | 22,694  |                                |   | 23,874 |  |      | 77,772  |  |   | 78,029 
|Junior subordinated debentures                        |  |                                               | 879     |                                |   | 1,410  |  |      | 2,957   |  |   | 4,987  
|Federal funds purchased and other borrowings          |  |                                               | 389     |                                |   | 1,125  |  |      | 1,340   |  |   | 2,693  
|Securities sold under repurchase agreements           |  |                                               | 320     |                                |   | 631    |  |      | 948     |  |   | 1,809  
|                                                      |  |                                               |         |                                |   |        |  |      |         |  |   |        
|Total interest expense                                |  |                                               | 24,282  |                                |   | 27,040 |  |      | 83,017  |  |   | 87,518 
|                                                      |  |                                               |         |                                |   |        |  |      |         |  |   |        
|                                                      |  |                                               |         |                               
|NET INTEREST INCOME                                   |  |                                               | 77,413  |                                |   | 57,806 |  |      | 227,012 |  |   | 163,772
|PROVISION FOR CREDIT LOSSES                           |  |                                               | 7,250   |                                |   | 1,700  |  |      | 20,275  |  |   | 3,867  
|                                                      |  |                                               |         |                                |   |        |  |      |         |  |   |        
|NET INTEREST INCOME AFTER PROVISION FOR CREDIT LOSSES |  |                                               | 70,163  |                                |   | 56,106 |  |      | 206,737 |  |   | 159,905
|                                                      |  |                                               |         |                                |   |        |  |      |         |  |   |        
|                                                      |  |                                               |         |                               
|NONINTEREST INCOME:                                   |  |                                               |         |                                |   |        |  |      |         |  |   |        
|Customer service fees                                 |  |                                               | 13,554  |                                |   | 11,348 |  |      | 38,789  |  |   | 32,581 
|Other                                                 |  |                                               | 1,682   |                                |   | 1,769  |  |      | 6,597   |  |   | 6,281  
|                                                      |  |                                               |         |                                |   |        |  |      |         |  |   |        
|Total noninterest income                              |  |                                               | 15,236  |                                |   | 13,117 |  |      | 45,386  |  |   | 38,862 
|                                                      |  |                                               |         |                                |   |        |  |      |         |  |   |        
|                                                      |  |                                               |         |                               
|NONINTEREST EXPENSE:                                  |  |                                               |         |                                |   |        |  |      |         |  |   |        
|Salaries and employee benefits                        |  |                                               | 21,507  |                                |   | 17,526 |  |      | 64,649  |  |   | 50,407 
|Net occupancy expense                                 |  |                                               | 3,624   |                                |   | 3,088  |  |      | 11,116  |  |   | 8,765  
|Data processing                                       |  |                                               | 1,446   |                                |   | 1,319  |  |      | 5,063   |  |   | 3,971  
|Core deposit intangible amortization                  |  |                                               | 2,479   |                                |   | 2,562  |  |      | 7,635   |  |   | 7,513  
|Depreciation expense                                  |  |                                               | 2,100   |                                |   | 1,955  |  |      | 6,170   |  |   | 5,812  
|Impairment write-down on securities                   |  |                                               |        |                                |   | 14,025 |  |      |        |  |   | 14,025 
|Other                                                 |  |                                               | 10,045  |                                |   | 5,755  |  |      | 34,891  |  |   | 15,717 
|                                                      |  |                                               |         |                                |   |        |  |      |         |  |   |        
|Total noninterest expense                             |  |                                               | 41,201  |                                |   | 46,230 |  |      | 129,524 |  |   | 106,210
|                                                      |  |                                               |         |                                |   |        |  |      |         |  |   |        
|                                                      |  |                                               |         |                               
|INCOME BEFORE INCOME TAXES                            |  |                                               | 44,198  |                                |   | 22,993 |  |      | 122,599 |  |   | 92,557 
|PROVISION FOR INCOME TAXES                            |  |                                               | 14,876  |                                |   | 7,546  |  |      | 41,289  |  |   | 30,735 
|                                                      |  |                                               |         |                                |   |        |  |      |         |  |   |        
|                                                      |  |                                               |         |                               
|NET INCOME                                            |  | $                                             | 29,322  |                                | $ | 15,447 |  | $    | 81,310  |  | $ | 61,822 
|                                                      |  |                                               |         |                                |   |        |  |      |         |  |   |        
|                                                      |  |                                               |         |                               
|EARNINGS PER SHARE                                    |  |                                               |         |                                |   |        |  |      |         |  |   |        
|Basic                                                 |  | $                                             | 0.64    |                                | $ | 0.34   |  | $    | 1.76    |  | $ | 1.37   
|                                                      |  |                                               |         |                                |   |        |  |      |         |  |   |        
|                                                      |  |                                               |         |                               
|Diluted                                               |  | $                                             | 0.63    |                                | $ | 0.33   |  | $    | 1.76    |  | $ | 1.37   
|                                                      |  |                                               |         |                                |   |        |  |      |         |  |   |        

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 |   | TreasuryStock |   |  | TotalShareholdersEquity |       
|                                                                                                 |  | Shares                                          |  | Amount         |        |                  |   |         |                                    
|                                                                                                 |  | (In thousands, except share and per share data) | 
|                                                                                                 |  |                                                 |  |                |        |                  |  
|BALANCE AT JANUARY 1, 2008                                                                       |  | 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                                                                                       |  |                                                 |  |                |        |                  |   |         |                                     |   | 84,507        |   |  |                          |        |  |   |      |   |  |   | 84,507    |  
|Net change in unrealized gain on available for sale securities (net of tax of $4,542)            |  |                                                 |  |                |        |                  |   |         |                                     |   |               |   |  |                          | 8,436  |  |   |      |   |  |   | 8,436     |  
|                                                                                                 |  |                                                 |  |                |        |                  |   |         |                                     |   |               |   |  |                          |        |  |   |      |   |  |   |           |  
|Total comprehensive income                                                                       |  |                                                 |  |                |        |                  |   |         |                                     |   |               |   |  |                          |        |  |   |      |   |  |   | 92,943    |  
|Common stock issued in connection with the 1stChoice acquisition                                 |  | 1,757,752                                       |  |                | 1,758  |                  |   | 54,385  |                                     |   |               |   |  |                          |        |  |   |      |   |  |   | 56,143    |  
|Common stock issued in connection with the exercise of stock options and restricted stock awards |  | 170,726                                         |  |                | 171    |                  |   | 2,427   |                                     |   |               |   |  |                          |        |  |   |      |   |  |   | 2,598     |  
|Stock based compensation expense                                                                 |  |                                                 |  |                |        |                  |   | 1,542   |                                     |   |               |   |  |                          |        |  |   |      |   |  |   | 1,542     |  
|Cash dividends declared, $0.513 per share                                                        |  |                                                 |  |                |        |                  |   |         |                                     |   | (23,377       | ) |  |                          |        |  |   |      |   |  |   | (23,377   | )
|                                                                                                 |  |                                                 |  |                |        |                  |   |         |                                     |   |               |   |  |                          |        |  |   |      |   |  |   |           |  
|                                                                                                 |  |                                                 |  |                |        |                  |  
|BALANCE AT DECEMBER 31, 2008                                                                     |  | 46,116,801                                      |  |                | 46,117 |                  |   | 867,380 |                                     |   | 332,363       |   |  |                          | 9,853  |  |   | (607 | ) |  |   | 1,255,106 |  
|Comprehensive income:                                                                            |  |                                                 |  |                |        |                  |   |         |                                     |   |               |   |  |                          |        |  |   |      |   |  |   |           |  
|Net income                                                                                       |  |                                                 |  |                |        |                  |   |         |                                     |   | 81,310        |   |  |                          |        |  |   |      |   |  |   | 81,310    |  
|Net change in unrealized gain on available for sale securities (net of tax of $4,036)            |  |                                                 |  |                |        |                  |   |         |                                     |   |               |   |  |                          | 7,494  |  |   |      |   |  |   | 7,494     |  
|                                                                                                 |  |                                                 |  |                |        |                  |   |         |                                     |   |               |   |  |                          |        |  |   |      |   |  |   |           |  
|Total comprehensive income                                                                       |  |                                                 |  |                |        |                  |   |         |                                     |   |               |   |  |                          |        |  |   |      |   |  |   | 88,804    |  
|Common stock issued in connection with the exercise of stock options and restricted stock awards |  | 73,189                                          |  |                | 73     |                  |   | 1,184   |                                     |   |               |   |  |                          |        |  |   |      |   |  |   | 1,257     |  
|Stock based compensation expense                                                                 |  |                                                 |  |                |        |                  |   | 887     |                                     |   |               |   |  |                          |        |  |   |      |   |  |   | 887       |  
|Cash dividends declared, $0.413 per share                                                        |  |                                                 |  |                |        |                  |   |         |                                     |   | (19,019       | ) |  |                          |        |  |   |      |   |  |   | (19,019   | )
|                                                                                                 |  |                                                 |  |                |        |                  |   |         |                                     |   |               |   |  |                          |        |  |   |      |   |  |   |           |  
|BALANCE AT SEPTEMBER 30, 2009                                                                    |  | 46,189,990                                      |  | $              | 46,190 |                  | $ | 869,451 |                                     | $ | 394,654       |   |  | $                        | 17,347 |  | $ | (607 | ) |  | $ | 1,327,035 |  
|                                                                                                 |  |                                                 |  |                |        |                  |   |         |                                     |   |               |   |  |                          |        |  |   |      |   |  |   |           |  

See notes to interim condensed consolidated financial statements.



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##### Table of Contents

PROSPERITY BANCSHARES, INC. ® AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(UNAUDITED)



|                                                                                   |  |                                |          |   |      |   |          |  
|---------------------------------------------------------------------------------- |  | ------------------------------ | -------- | - | ---- | - | -------- | -
|                                                                                   |  | Nine Months EndedSeptember 30, |         
|                                                                                   |  | 2009                           |          |   | 2008 |  
|                                                                                   |  | (Dollars in thousands)         |         
|                                                                                   |  |                               
|CASH FLOWS FROM OPERATING ACTIVITIES:                                              |  |                                |          |   |      |   |          |  
|Net income                                                                         |  | $                              | 81,310   |   |      | $ | 61,822   |  
|Adjustments to reconcile net income to net cash provided by operating activities:  |  |                                |          |   |      |   |          |  
|Depreciation and amortization                                                      |  |                                | 13,805   |   |      |   | 13,325   |  
|Provision for credit losses                                                        |  |                                | 20,275   |   |      |   | 3,867    |  
|Net (accretion) amortization of discount/ premium on investments                   |  |                                | (972     | ) |      |   | (2,313   | )
|Net amortization of loan and deposit premiums                                      |  |                                | (5,644   | ) |      |   | (1,646   | )
|Net (gain) loss on sale of other real estate                                       |  |                                | (552     | ) |      |   | 648      |  
|Net gain on sale of premises, equipment and other assets                           |  |                                | (277     | ) |      |   | (715     | )
|Net gain on held for sale loans                                                    |  |                                |         |   |      |   | (229     | )
|Proceeds from held for sale loans                                                  |  |                                | 99       |   |      |   | 11,076   |  
|Stock-based compensation expense                                                   |  |                                | 887      |   |      |   | 1,111    |  
|Impairment write-down of securities                                                |  |                                |         |   |      |   | 14,025   |  
|Decrease (increase) in other assets and accrued interest receivable                |  |                                | 2,540    |   |      |   | (987     | )
|Decrease in accrued interest payable and other liabilities                         |  |                                | (33,295  | ) |      |   | (4,989   | )
|                                                                                   |  |                                |          |   |      |   |          |  
|Net cash provided by operating activities                                          |  |                                | 78,176   |   |      |   | 94,995   |  
|                                                                                   |  |                                |          |   |      |   |          |  
|                                                                                   |  |                               
|CASH FLOWS FROM INVESTING ACTIVITIES:                                              |  |                                |          |   |      |   |          |  
|Proceeds from maturities and principal paydowns of held to maturity securities     |  |                                | 664,477  |   |      |   | 436,614  |  
|Purchase of held to maturity securities                                            |  |                                | (945,836 | ) |      |   | (885,047 | )
|Proceeds from maturities and principal paydowns of available for sale securities   |  |                                | 799,173  |   |      |   | 582,039  |  
|Purchase of available for sale securities                                          |  |                                | (599,999 | ) |      |   | (549,962 | )
|Net decrease in loans                                                              |  |                                | 125,881  |   |      |   | 53,813   |  
|Purchase of bank premises and equipment                                            |  |                                | (33,597  | ) |      |   | (6,222   | )
|Net decrease in interest-bearing deposits in financial institutions                |  |                                | 106      |   |      |   | 331      |  
|Proceeds from sale of bank premises, equipment, other real estate and other assets |  |                                | 19,739   |   |      |   | 14,341   |  
|Purchase of Banco Popular branches                                                 |  |                                | (50      | ) |      |   | (440     | )
|Cash and cash equivalents acquired in the purchase of Banco Popular branches       |  |                                |         |   |      |   | 112,788  |  
|Purchase of 1stChoice Bancorp                                                      |  |                                | (17      | ) |      |   | (19,129  | )
|Cash and cash equivalents acquired in the purchase of 1stChoice Bancorp            |  |                                |         |   |      |   | 84,240   |  
|Purchase of Franklin Bank branches                                                 |  |                                | (836     | ) |      |   |         |  
|Purchase of Texas United Bancshares, Inc.                                          |  |                                |         |   |      |   | (74      | )
|                                                                                   |  |                                |          |   |      |   |          |  
|Net cash provided by (used in) investing activities                                |  |                                | 29,041   |   |      |   | (176,708 | )
|                                                                                   |  |                                |          |   |      |   |          |  

(Table continued on following page)



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##### Table of Contents

|                                                             |  |                                |          |   |      |   |          |  
|------------------------------------------------------------ |  | ------------------------------ | -------- | - | ---- | - | -------- | -
|                                                             |  | Nine Months EndedSeptember 30, |         
|                                                             |  | 2009                           |          |   | 2008 |  
|                                                             |  | (Dollars in thousands)         |         
|CASH FLOWS FROM FINANCING ACTIVITIES:                        |  |                                |          |   |      |   |          |  
|Net (decrease) increase in noninterest-bearing deposits      |  | $                              | (52,610  | ) |      | $ | 15       |  
|Net decrease in interest-bearing deposits                    |  |                                | (137,695 | ) |      |   | (273,248 | )
|Net proceeds of other short-term borrowings                  |  |                                | 26,000   |   |      |   | 190,000  |  
|Repayments of other long-term borrowings                     |  |                                | (1,540   | ) |      |   | (1,795   | )
|Net increase in securities sold under repurchase agreements  |  |                                | 4,619    |   |      |   | 15,729   |  
|Redemption of junior subordinated debentures                 |  |                                |         |   |      |   | (20,620  | )
|Proceeds from exercise of stock options                      |  |                                | 1,257    |   |      |   | 2,513    |  
|Payments of cash dividends                                   |  |                                | (19,019  | ) |      |   | (17,041  | )
|                                                             |  |                                |          |   |      |   |          |  
|Net cash used in financing activities                        |  |                                | (178,988 | ) |      |   | (104,447 | )
|                                                             |  |                                |          |   |      |   |          |  
|                                                             |  |                               
|NET DECREASE IN CASH AND CASH EQUIVALENTS                    |  | $                              | (71,771  | ) |      | $ | (186,160 | )
|CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD               |  |                                | 228,633  |   |      |   | 371,090  |  
|                                                             |  |                                |          |   |      |   |          |  
|CASH AND CASH EQUIVALENTS, END OF PERIOD                     |  | $                              | 156,862  |   |      | $ | 184,930  |  
|                                                             |  |                                |          |   |      |   |          |  
|                                                             |  |                               
|NONCASH ACTIVITIES:                                          |  |                                |          |   |      |   |          |  
|Stock issued in connection with the acquisition of 1stChoice |  | $                              |         |   |      | $ | 56,142   |  
|                                                             |  |                               
|SUPPLEMENTAL DISCLOSURES:                                    |  |                                |          |   |      |   |          |  
|Cash paid for income taxes                                   |  | $                              | 44,300   |   |      | $ | 34,600   |  
|Cash paid for interest                                       |  |                                | 89,255   |   |      |   | 89,755   |  

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, 2009

(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, 2008. Operating results for the nine month period ended September 30, 2009 are not necessarily indicative of the results that may be expected for the year ending
December 31, 2009 or any other period.

Accounting Standards Codification. The Financial Accounting Standards
Boards (FASB) Accounting Standards Codification (ASC) became effective on July 1, 2009. At that date, the ASC became FASBs officially recognized source of authoritative U.S. generally accepted accounting
principles (GAAP) applicable to all public and non-public non-governmental entities, superseding existing FASB, American Institute of Certified Public Accountants (AICPA), Emerging Issues Task Force (EITF) and related
literature. Rules and interpretive releases of the SEC under the authority of federal securities laws are also sources of authoritative GAAP for SEC registrants. All other accounting literature is considered non-authoritative. The switch to the ASC
affects the way companies refer to U.S. GAAP in financial statements and accounting policies. Citing particular content in the ASC involves specifying the unique numeric path to the content through the Topic, Subtopic, Section and Paragraph
structure.

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,
|                                                           |  | 2009                                     |        | 2008                           |   | 2009   |  | 2008
|                                                           |  | (In thousands, except per share amounts)
|                                                           |  |                                          |        |                               
|Net income available to common shareholders                |  | $                                        | 29,322 |                                | $ | 15,447 |  | $    | 81,310 |  | $ | 61,822
|                                                           |  |                                          |        |                               
|Weighted average common shares outstanding                 |  |                                          | 46,125 |                                |   | 46,065 |  |      | 46,106 |  |   | 45,038
|Potential dilutive common shares                           |  |                                          | 222    |                                |   | 237    |  |      | 137    |  |   | 179   
|                                                           |  |                                          |        |                                |   |        |  |      |        |  |   |       
|Weighted average common shares and equivalents outstanding |  |                                          | 46,347 |                                |   | 46,302 |  |      | 46,243 |  |   | 45,217
|                                                           |  |                                          |        |                                |   |        |  |      |        |  |   |       
|                                                           |  |                                          |        |                               
|Basic earnings per common share                            |  | $                                        | 0.64   |                                | $ | 0.34   |  | $    | 1.76   |  | $ | 1.37  
|                                                           |  |                                          |        |                                |   |        |  |      |        |  |   |       
|Diluted earnings per common share                          |  | $                                        | 0.63   |                                | $ | 0.33   |  | $    | 1.76   |  | $ | 1.37  
|                                                           |  |                                          |        |                                |   |        |  |      |        |  |   |       

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, 2009 and 2008 that would have had an anti-dilutive effect on the above computation.



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PROSPERITY BANCSHARES, INC. ®AND SUBSIDIARIES

NOTES TO INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS(Continued)

SEPTEMBER 30, 2009

(UNAUDITED)



3. NEW AUTHORITATIVE ACCOUNTING GUIDANCE

As discussed in Note 1  Basis of Presentation, on July 1, 2009, the Accounting Standards Codification became FASBs
officially recognized source of authoritative U.S. generally accepted accounting principles applicable to all public and non-public non-governmental entities, superseding existing FASB, AICPA, EITF and related literature. Rules and interpretive
releases of the SEC under the authority of federal securities laws are also sources of authoritative GAAP for SEC registrants. All other accounting literature is considered non-authoritative. The switch to the ASC affects the way companies refer to
U.S. GAAP in financial statements and accounting policies. Citing particular content in the ASC involves specifying the unique numeric path to the content through the Topic, Subtopic, Section and Paragraph structure.

FASB ASC Topic 320, InvestmentsDebt and Equity Securities. New authoritative accounting guidance under ASC Topic
320, InvestmentsDebt and Equity Securities, (i) changes existing guidance for determining whether an impairment is other than temporary to debt securities and (ii) replaces the existing requirement that the entitys
management assert it has both the intent and ability to hold an impaired security until recovery with a requirement that management assert: (a) it does not have the intent to sell the security; and (b) it is more likely than not it will
not have to sell the security before recovery of its cost basis. Under ASC Topic 320, 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 to the extent the impairment is related to credit losses. The amount of the impairment related to other factors is recognized in other comprehensive income. The Company adopted the provisions of the new authoritative
accounting guidance under ASC Topic 320 during the first quarter of 2009. Adoption of the new guidance did not significantly impact the Companys financial statements.

FASB ASC Topic 805, Business Combinations. On January 1, 2009, new authoritative accounting guidance under ASC Topic
805, Business Combinations, became applicable to the Companys accounting for business combinations closing on or after January 1, 2009. ASC Topic 805 applies to all transactions and other events in which one entity obtains
control over one or more other businesses. ASC Topic 805 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 previous accounting guidance whereby the cost of an acquisition was allocated to the individual assets acquired and liabilities assumed based on their estimated fair value. ASC Topic
805 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 prior accounting guidance. Assets acquired and liabilities
assumed in a business combination that arise from contingencies are to be recognized at fair value if fair value can be reasonably estimated. If fair value of such an asset or liability cannot be reasonably estimated, the asset or liability would
generally be recognized in accordance with ASC Topic 450, Contingencies. Under ASC Topic 805, the requirements of ASC Topic 420, Exit or Disposal Cost Obligations, 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 ASC Topic 450, Contingencies. Adoption of the new guidance will have a significant impact on the Companys accounting for business
combinations closing on or after January 1, 2009.



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PROSPERITY BANCSHARES, INC. ®AND SUBSIDIARIES

NOTES TO INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS(Continued)

SEPTEMBER 30, 2009

(UNAUDITED)



FASB ASC Topic 820, Fair Value Measurements and Disclosures.New
authoritative accounting guidance under ASC Topic 820, Fair Value Measurements and Disclosures, affirms that the objective of fair value when the market for an asset is not active is the price that would be received to sell the asset in
an orderly transaction, and clarifies and includes additional factors for determining whether there has been a significant decrease in market activity for an asset when the market for that asset is not active. ASC Topic 820 requires an entity to
base its conclusion about whether a transaction was not orderly on the weight of the evidence. The new accounting guidance amended prior guidance to expand certain disclosure requirements. The Company adopted the new authoritative accounting
guidance under ASC Topic 820 during the first quarter of 2009. Adoption of the new guidance did not significantly impact the Companys financial statements.

Further new authoritative accounting guidance (Accounting Standards Update No. 2009-5) under ASC Topic 820 provides guidance for measuring the fair value of a liability in circumstances in which a
quoted price in an active market for the identical liability is not available. In such instances, a reporting entity is required to measure fair value utilizing a valuation technique that uses (i) the quoted price of the identical liability
when traded as an asset, (ii) quoted prices for similar liabilities or similar liabilities when traded as assets, or (iii) another valuation technique that is consistent with the existing principles of ASC Topic 820, such as an income
approach or market approach. The new authoritative accounting guidance also clarifies that when estimating the fair value of a liability, a reporting entity is not required to include a separate input or adjustment to other inputs relating to the
existence of a restriction that prevents the transfer of the liability. The forgoing new authoritative accounting guidance under ASC Topic 820 will be effective for the Companys financial statements beginning October 1, 2009 and is not
expected to have a significant impact on the Companys financial statements.

FASB ASC Topic 825 Financial
Instruments. New authoritative accounting guidance under ASC Topic 825, Financial Instruments, requires an entity to provide disclosures about the fair value of financial instruments in interim financial information and amends
prior guidance to require those disclosures in summarized financial information at interim reporting periods. The new interim disclosures required under Topic 825 are included in Note 4Fair Value Disclosures.

FASB ASC Topic 855, Subsequent Events. New authoritative accounting guidance under ASC Topic 855, Subsequent
Events, establishes general standards of accounting for and disclosure of events that occur after the balance sheet date but before financial statements are issued or available to be issued. ASC Topic 855 defines (i) the period after the
balance sheet date during which a reporting entitys management should evaluate events or transactions that may occur for potential recognition or disclosure in the financial statements, (ii) the circumstances under which an entity should
recognize events or transactions occurring after the balance sheet date in its financial statements, and (iii) the disclosures an entity should make about events or transactions that occurred after the balance sheet date. The new authoritative
accounting guidance under ASC Topic 855 became effective for the Companys financial statements for periods ending after June 15, 2009 and did not have a significant impact on the Companys financial statements.

In June 2009, the FASB issued SFAS No. 166, Accounting for Transfers of Financial Assets, which is a revision to SFAS
No. 140. It requires more information about transfers of financial assets, including securitization transactions and a companys continuing exposure to the risks related to the transfer of financial assets. It eliminates the concept of a
qualifying special-purpose entity and changes the requirements for derecognizing financial assets. SFAS No. 166 is effective for first annual reporting period beginning after November 15, 2009. The Company is evaluating SFAS
No. 166 but does not expect that it will have a significant impact on its consolidated financial statements.



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PROSPERITY BANCSHARES, INC. ®AND SUBSIDIARIES

NOTES TO INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS(Continued)

SEPTEMBER 30, 2009

(UNAUDITED)



In June 2009, the FASB issued SFAS No. 167, Amendments to FASB Interpretation
No. 46(R), which is a revision to FIN No. 46(R), Consolidation of Variable Interest Entities.It improves financial reporting by enterprises involved with variable interest entities and changes how a company determines when an
entity that is insufficiently capitalized or is not controlled through voting (or similar rights) should be consolidated. The determination of whether a company is required to consolidate an entity is based on, among other things, an entitys
purpose and design and a companys ability to direct the activities of the entity that most significantly impact the entitys economic performance. SFAS No. 167 is effective for first annual reporting period beginning after
November 15, 2009. The Company is evaluating SFAS No. 167 but does not expect that it will have a significant impact on its consolidated financial statements.

4. FAIR VALUE DISCLOSURES

Effective January 1, 2008, the Company
adopted FASB ASC Topic 820, Fair Value Measurement and Disclosures. ASC Topic 820, which defines fair value, addresses aspects of the expanding application of fair value accounting and establishes a consistent framework for measuring fair
value. Fair values represent the estimated price that would be received from selling an asset or paid to transfer a liability, otherwise knows as an exit price.

Fair Value Hierarchy

ASC Topic 820 specifies a hierarchy of valuation techniques based on whether the inputs to those valuation techniques are observable or unobservable. In accordance with ASC Topic 820, 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. The Companys 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 ASC Topic 820.

The following table presents
fair value measurements as of September 30, 2009:



|                                              |  |                        |   |         |   |         |  |       |   |  |   |        
|--------------------------------------------- |  | ---------------------- | - | ------- | - | ------- |  | ----- | - |  | - | -------
|                                              |  | Level 1                |   | Level 2 |   | Level 3 |  | Total
|                                              |  | (Dollars in thousands)
|                                              |  |                        |   |        
|Measured on a recurring basis:                |  |                        |   |         |   |         |  |       |   |  |   |        
|Available for sale securities (at fair value) |  | $                      |  |         | $ | 630,517 |  | $     |  |  | $ | 630,517
|                                              |  |                        |   |         |   |         |  |       |   |  |   |        
|                                              |  |                        |   |        
|TOTAL                                         |  | $                      |  |         | $ | 630,517 |  | $     |  |  | $ | 630,517
|                                              |  |                        |   |         |   |         |  |       |   |  |   |        



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PROSPERITY BANCSHARES, INC. ®AND SUBSIDIARIES

NOTES TO INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS(Continued)

SEPTEMBER 30, 2009

(UNAUDITED)



Certain assets and liabilities are measured at fair value on a non-recurring basis; that
is, the instruments are not measured at fair value on an ongoing basis but are subject to fair value adjustments in certain circumstances (for example, when there is evidence of impairment). These instruments include other real
estate owned, repossessed assets and impaired loans per ASC Topic 310, Receivables. For the three months ended September 30, 2009, the Company had additions to impaired loans of $5.5 million and additions to other real estate owned
of $5.1 million, all of which were outstanding September 30, 2009. The remaining financial assets and financial liabilities measured at fair value on a non-recurring basis that were recorded in 2009 and remained outstanding at
September 30, 2009 were not significant.

The fair value of an asset or liability is the price that would be received to
sell that asset or paid to transfer that liability in an orderly transaction occurring in the principal market (or most advantageous market in the absence of a principal market) for such asset or liability. In estimating fair value, the Corporation
utilizes valuation techniques that are consistent with the market approach, the income approach and/or the cost approach. Such valuation techniques are consistently applied. Inputs to valuation techniques include the assumptions that market
participants would use in pricing an asset or liability. FASB ASC Topic 820 establishes a fair value hierarchy for valuation inputs that gives the highest priority to quoted prices in active markets for identical assets or liabilities and the lowest
priority to unobservable inputs

These fair value disclosures represent the Companys estimates based on relevant market
information and information about the financial instruments. Fair value estimates are based on judgments regarding future expected loss experience, current economic conditions, risk characteristics of the various instruments, and other factors.
These estimates are subjective in nature and involve uncertainties and matters of significant judgment and therefore cannot be determined with precision. Changes in the above methodologies and assumptions could significantly affect the estimates.

The following methods and assumptions were used to estimate the fair value of each class of financial instruments for which
it is practicable to estimate that value:

Cash and Cash EquivalentsFor these short-term instruments, the
carrying amount is a reasonable estimate of fair value.

Federal Funds SoldThe carrying amount is a reasonable
estimate of fair value.

SecuritiesFor securities held as investments, fair value equals quoted market price, if
available. If a quoted market price is not available, fair value is estimated using quoted market prices for similar securities.

Loans Held for InvestmentFor certain homogeneous categories of loans (such as some residential mortgages and other consumer loans), fair value is estimated by discounting the future cash flows using the risk-free Treasury rate
for the applicable maturity, adjusted for servicing and credit risk. The carrying value of variable rate loans approximates fair value because the loans reprice frequently to current market rates.

DepositsThe fair value of demand deposits, savings accounts and certain money market deposits is the amount payable on demand
at the reporting date. The fair value of fixed-maturity certificates of deposit is estimated using the rates currently offered for deposits of similar remaining maturities.

Junior Subordinated DebenturesThe fair value of the junior subordinated debentures was calculated using the quoted market
prices, if available. If quoted market prices are not available, fair value is estimated using quoted market prices for similar subordinated debentures.

Other BorrowingsRates currently available to the Company for debt with similar terms and remaining maturities are used to estimate the fair value of existing debt using a discounted cash
flows methodology.

Securities Sold Under Repurchase AgreementsThe fair value of securities sold under repurchase
agreements is the amount payable on demand at the reporting date.



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PROSPERITY BANCSHARES, INC. ®AND SUBSIDIARIES

NOTES TO INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS(Continued)

SEPTEMBER 30, 2009

(UNAUDITED)



Off-Balance Sheet Financial InstrumentsThe fair value of commitments to
extend credit and standby letters of credit is estimated using the fees currently charged to enter into similar agreements, taking into account the remaining terms of the agreement and the present creditworthiness of the counterparties.

FASB ASC Topic 825, Financial Instruments, requires disclosure of the fair value of financial assets and financial liabilities,
including those financial assets and financial liabilities that are not measured and reported at fair value on a recurring basis or non-recurring basis. The carrying amount and estimated fair values of the Companys financial instruments are as
follows:



|                                                                           |  |                        |           |                      |   |          
|-------------------------------------------------------------------------- |  | ---------------------- | --------- | -------------------- | - | ---------
|                                                                           |  | September 30, 2009    
|                                                                           |  | Carrying Amount        |           | Estimated Fair Value
|                                                                           |  | (Dollars in thousands)
|Financial assets:                                                          |  |                        |           |                      |   |          
|Cash and due from banks                                                    |  | $                      | 120,932   |                      | $ | 120,932  
|Federal funds sold                                                         |  |                        | 35,930    |                      |   | 35,930   
|Available for sale securities                                              |  |                        | 630,517   |                      |   | 630,517  
|Held to maturity securities                                                |  |                        | 3,624,540 |                      |   | 3,741,212
|Loans held for investment and for sale, net of allowance for credit losses |  |                        | 3,358,825 |                      |   | 3,384,882
|                                                                           |  |                        |           |                      |   |          
|Total                                                                      |  | $                      | 7,770,744 |                      | $ | 7,913,473
|                                                                           |  |                        |           |                      |   |          
|                                                                           |  |                       
|Financial liabilities:                                                     |  |                        |           |                      |   |          
|Deposits                                                                   |  | $                      | 7,117,993 |                      | $ | 7,141,027
|Other borrowings                                                           |  |                        | 253,855   |                      |   | 255,520  
|Securities sold under repurchase agreements                                |  |                        | 100,636   |                      |   | 100,636  
|Junior subordinated debentures                                             |  |                        | 92,265    |                      |   | 82,077   
|                                                                           |  |                        |           |                      |   |          
|Total                                                                      |  | $                      | 7,564,749 |                      | $ | 7,579,260
|                                                                           |  |                        |           |                      |   |          

The Companys off-balance sheet commitments are funded at current market rates
at the date they are drawn upon. It is managements opinion that the fair value of these commitments would approximate their carrying value, if drawn upon.

The fair value estimates presented herein are based on pertinent information available to management as of the dates indicated. Although management is not aware of any factors that would significantly
affect the estimated fair value amounts, such amounts have not been comprehensively revalued for purposes of these financial statements since those dates and, therefore, current estimates of fair value may differ significantly from the amounts
presented herein.

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,
2009 were as follows:



|                                       |  |                        |         |                          |   |        |  
|-------------------------------------- |  | ---------------------- | ------- | ------------------------ | - | ------ | -
|                                       |  | Goodwill               |         | Core Deposit Intangibles |  
|                                       |  | (Dollars in thousands) |        
|                                       |  |                       
|Balance as of December 31, 2008        |  | $                      | 874,654 |                          | $ | 38,196 |  
|Amortization                           |  |                        |        |                          |   | (7,635 | )
|Acquisition of Banco Popular branches  |  |                        | 50      |                          |   |       |  
|Acquisition of 1stChoice Bancorp, Inc. |  |                        | 17      |                          |   |       |  
|Acquisition of Franklin Bank branches  |  |                        | 2,237   |                          |   | 7,264  |  
|                                       |  |                        |         |                          |   |        |  
|Balance as of September 30, 2009       |  | $                      | 876,958 |                          | $ | 37,825 |  
|                                       |  |                        |         |                          |   |        |  



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##### Table of Contents

PROSPERITY BANCSHARES, INC. ®AND SUBSIDIARIES

NOTES TO INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS(Continued)

SEPTEMBER 30, 2009

(UNAUDITED)



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. Management performs an evaluation
annually, and more frequently if a triggering event occurs, 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, 2009, there were no
impairments recorded on goodwill or other intangibles.

During the nine months ended September 30, 2009, Company
completed the valuation of the assets acquired and liabilities assumed in the Franklin Bank acquisition and allocated $7.3 million to core deposit intangibles and allocated $7.2 million to certificates of deposit. Both amounts had previously been
reflected in goodwill as of December 31, 2008 pending the completed valuations.

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 $76.7 million and $69.5 million at September 30, 2009 and December 31, 2008,
respectively. Net core deposit intangibles outstanding were $37.8 million and $38.2 million at the same dates, respectively. Amortization expense related to intangible assets totaled $2.5 million and $2.6 million for the three months ended
September 30, 2009 and 2008 and $7.6 million and $7.5 million for the nine months ended September 30, 2009 and 2008, respectively. The estimated aggregate future amortization expense for intangible assets remaining as of September 30,
2009 is as follows (dollars in thousands):



|               |  |   |       
|-------------- |  | - | ------
|Remaining 2009 |  | $ | 2,349 
|               | 
|2010           |  |   | 8,753 
|               | 
|2011           |  |   | 7,420 
|               | 
|2012           |  |   | 6,033 
|               | 
|2013           |  |   | 4,190 
|               | 
|Thereafter     |  |   | 9,080 
|               |  |   |       
|               | 
|Total          |  | $ | 37,825
|               |  |   |       

6. STOCK BASED COMPENSATION

At September 30, 2009, the Company had three stock-based employee compensation plans adopted by the Company and five stock option plans
assumed in connection with acquisitions under which no additional options will be granted. Two of the three plans adopted by the Company have expired and therefore no additional awards may be issued under those plans. The Company accounts for
stock-based employee compensation plans using the fair-value-based method of accounting in accordance with FASB ASC Topic 718, Stock Compensation.ASC Topic 718 was effective for companies in 2006, however, the Company had been recognizing
compensation expense since January 1, 2003. The Companys results of operations reflect compensation expense for all employee stock-based compensation, including the unvested portion of stock options granted prior to 2003. ASC Topic 718
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. The Company recognized $887,000 and $1.1 million in stock-based compensation expense for the nine months ended September 30, 2009 and 2008, respectively, and $267,000 and $470,000 in stock-based compensation expense
for the three months ended September 30, 2009 and 2008, respectively. There was approximately $201,000 and $235,000 of income tax benefit recorded for the stock-based compensation expense for the nine months ended September 30, 2009 and
2008, respectively, and $56,000 and $113,000 of income tax benefit recorded for the stock-based compensation expense for the three months ended September 30, 2009 and 2008, respectively.



14



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##### Table of Contents

PROSPERITY BANCSHARES, INC. ®AND SUBSIDIARIES

NOTES TO INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS(Continued)

SEPTEMBER 30, 2009

(UNAUDITED)



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, 2009, there were 50,922 shares of restricted stock outstanding with a weighted average grant date fair value of $31.19.

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, |  
|                        |  | 2009          |   |  | 2008  |  
|Expected life in years  |  | 5.08          |   |  | 5.02  |  
|Risk free interest rate |  | 3.94          | % |  | 4.14  | %
|Volatility              |  | 21.29         | % |  | 21.22 | %
|Dividend yield          |  | 1.25          | % |  | 1.21  | %

A summary of changes in outstanding vested and unvested options during the nine
months ended September 30, 2009 is set forth below:



|                                         |  |                  |   |  |                                |       |                                           |      |                          |   |      
|---------------------------------------- |  | ---------------- | - |  | ------------------------------ | ----- | ----------------------------------------- | ---- | ------------------------ | - | -----
|                                         |  | Number ofOptions |   |  | Weighted AverageExercise Price |       | Weighted AverageRemaining ContractualTerm |      | Aggregate IntrinsicValue
|                                         |  | (In thousands)   |   |  |                                |       |                                           |      | (In thousands)          
|                                         |  |                  |   | 
|Options outstanding, beginning of period |  | 918              |   |  | $                              | 24.58 |                                           |      |                          |   |      
|Options granted                          |  | 72               |   |  |                                | 30.64 |                                           |      |                          |   |      
|Options forfeited                        |  | (21              | ) |  |                                | 28.40 |                                           |      |                          |   |      
|Options exercised                        |  | (76              | ) |  |                                | 16.55 |                                           |      |                          |   |      
|                                         |  |                  |   |  |                                |       |                                           |      |                          |   |      
|                                         |  |                  |   | 
|Options outstanding, end of period       |  | 893              |   |  | $                              | 25.66 |                                           | 5.15 |                          | $ | 8,157
|                                         |  |                  |   |  |                                |       |                                           |      |                          |   |      
|                                         |  |                  |   | 
|Options vested or expected to vest       |  | 866              |   |  | $                              | 25.48 |                                           | 5.08 |                          | $ | 8,069
|                                         |  |                  |   |  |                                |       |                                           |      |                          |   |      
|                                         |  |                  |   | 
|Options exercisable, end of period       |  | 352              |   |  | $                              | 21.40 |                                           | 4.01 |                          | $ | 4,712
|                                         |  |                  |   |  |                                |       |                                           |      |                          |   |      



A total of 72,500 options were granted during the nine months ended September 30, 2009 and 5,000 options were granted during the nine months ended September 30, 2008. The total intrinsic value
of the options exercised during the nine month periods ended September 30, 2009 and 2008 was $1.4 million and $2.7 million, respectively. The total fair value of options vested during the nine month periods ended September 30, 2009 and
2008 was $263,000 and $385,000, respectively.



15



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##### Table of Contents

PROSPERITY BANCSHARES, INC. ®AND SUBSIDIARIES

NOTES TO INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS(Continued)

SEPTEMBER 30, 2009

(UNAUDITED)



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



|                                                  |  |                                 |   |      |                                       |      |                  |     |   |                                       |   |     
|------------------------------------------------- |  | ------------------------------- | - | ---- | ------------------------------------- | ---- | ---------------- | --- | - | ------------------------------------- | - | ----
|                                                  |  | Nine Months Ended September 30,
|                                                  |  | 2009                            |   | 2008
|                                                  |  | Number ofOptions                |   |      | Weighted AverageGrant Date Fair Value |      | Number ofOptions |     |   | Weighted AverageGrant Date Fair Value
|                                                  |  | (In thousands)                  |   |      |                                       |      | (In thousands)   |     |   |                                      
|                                                  |  |                                 |   |     
|Unvested options outstanding, beginning of period |  | 529                             |   |      | $                                     | 6.83 |                  | 707 |   |                                       | $ | 6.52
|Options granted                                   |  | 72                              |   |      |                                       | 6.31 |                  | 5   |   |                                       |   | 3.85
|Unvested options forfeited                        |  | (15                             | ) |      |                                       | 6.98 |                  | (3  | ) |                                       |   | 5.52
|Options vested                                    |  | (45                             | ) |      |                                       | 5.70 |                  | (90 | ) |                                       |   | 4.29
|                                                  |  |                                 |   |      |                                       |      |                  |     |   |                                       |   |     
|Unvested options outstanding, end of period       |  | 541                             |   |      | $                                     | 6.82 |                  | 619 |   |                                       | $ | 6.82
|                                                  |  |                                 |   |      |                                       |      |                  |     |   |                                       |   |     

The Company received $1.3 million and $2.5 million in cash from the exercise of stock
options during the nine month periods ended September 30, 2009 and 2008, respectively. There was no tax benefit realized from option exercises of the stock-based compensation arrangements during the nine month periods ended September 30,
2009 and 2008.

As of September 30, 2009, there was $907,000 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 2.2 years.

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 or
$9.1 million after-tax (write-down on securities), which represents the Companys full carrying cost of its investment.

8. CONTRACTUAL OBLIGATIONS AND OFF-BALANCE SHEET ITEMS

Contractual Obligations

The following table summarizes the Companys contractual obligations and other commitments to make future payments as of
September 30, 2009 (other than deposit obligations). The payments do not include prepayment options that may be available to the Company. 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, 2009 are summarized below. Payments for junior subordinated debentures include interest of $71.9 million that will be paid over the future periods. The future
interest payments were calculated using the current rate in effect at September 30, 2009. With respect to floating interest rates, the payments were determined based on the 3-month LIBOR in effect at September 30, 2009. The current
principal balance of the junior subordinated debentures at September 30, 2009 was $92.3 million. Payments for FHLB notes payable include interest of $5.4 million that will be paid over the future periods. Payments related to leases are based on
actual payments specified in underlying contracts.



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##### Table of Contents

PROSPERITY BANCSHARES, INC. ®AND SUBSIDIARIES

NOTES TO INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS(Continued)

SEPTEMBER 30, 2009

(UNAUDITED)



|                                     |  |                        |       |                 |   |                 |  |            |        |       |   |         |  |   |        
|------------------------------------ |  | ---------------------- | ----- | --------------- | - | --------------- |  | ---------- | ------ | ----- | - | ------- |  | - | -------
|                                     |  | Payments due in:      
|                                     |  | RemainingFiscal 2009   |       | Fiscal2010-2011 |   | Fiscal2012-2013 |  | Thereafter |        | Total
|                                     |  | (Dollars in thousands)
|                                     |  |                        |       |                 |  
|Junior subordinated debentures       |  | $                      | 805   |                 | $ | 6,444           |  | $          | 6,444  |       | $ | 150,521 |  | $ | 164,214
|Federal Home Loan Bank notes payable |  |                        | 1,146 |                 |   | 15,703          |  |            | 3,356  |       |   | 13,048  |  |   | 33,253 
|Operating leases                     |  |                        | 1,150 |                 |   | 7,671           |  |            | 5,376  |       |   | 2,108   |  |   | 16,305 
|                                     |  |                        |       |                 |   |                 |  |            |        |       |   |         |  |   |        
|Total                                |  | $                      | 3,101 |                 | $ | 29,818          |  | $          | 15,176 |       | $ | 165,677 |  | $ | 213,772
|                                     |  |                        |       |                 |   |                 |  |            |        |       |   |         |  |   |        

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, 2009 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 2009   |        | Fiscal2010-2011 |   | Fiscal2012-2013 |  | Thereafter |       | Total
|                             |  | (Dollars in thousands)
|                             |  |                        |        |                 |  
|Standby letters of credit    |  | $                      | 4,735  |                 | $ | 9,624           |  | $          | 587   |       | $ |        |  | $ | 14,946 
|Commitments to extend credit |  |                        | 79,006 |                 |   | 274,850         |  |            | 6,009 |       |   | 150,079 |  |   | 509,944
|                             |  |                        |        |                 |   |                 |  |            |       |       |   |         |  |   |        
|Total                        |  | $                      | 83,741 |                 | $ | 284,474         |  | $          | 6,596 |       | $ | 150,079 |  | $ | 524,890
|                             |  |                        |        |                 |   |                 |  |            |       |       |   |         |  |   |        

9. SUBSEQUENT EVENTS

The Company adopted FASB ASC Topic 855, Subsequent Eventson June 15, 2009 which requires management to evaluate, as of each
reporting period, events or transactions that occur after the balance sheet date through the date that the financial statements are issued or are available to be issued. It does not change the recognition and disclosure requirements in AU
Section 560 for Type I and Type II subsequent events; however, FASB ASC Topic 855 refers to them as recognized (Type I) and nonrecognized subsequent events (Type II). The Company must consider supplementing historical financial statements with
the pro forma impact of nonrecognized subsequent events if the event is so significant that disclosure of the event could be best made through the use of pro forma financial data. ASC Topic 855 is effective prospectively for interim or annual
financial periods ending after June 15, 2009. The adoption of this pronouncement did not have a significant impact on the Companys financial statements. The Company evaluated all events and transactions that occurred after the balance
sheet date through November 6, 2009 and determined no reportable subsequent events existed.



17



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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 made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. Forward-looking statements are based on assumptions and involve a number of risks and uncertainties, many of which are
beyond the Companys control. Many possible events or factors could affect the future financial results and performance of the Company and could cause such results or performance to differ materially from those expressed in the forward-looking
statements. These possible events or factors include, without limitation:



| |  | changes in the strength of the United States economy in general and the strength of the local economies in which the Company conducts operations
resulting in, among other things, a deterioration in credit quality or reduced demand for credit, including the result and effect on the Companys loan portfolio and allowance for credit losses;
|- |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  | 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;
|- |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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



| |  | the timing, impact and other uncertainties of any 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;
|- |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  | the incurrence and possible impairment of goodwill associated with an acquisition and possible adverse short-term effects on the results of operations;
|- |  | -------------------------------------------------------------------------------------------------------------------------------------------------------



| |  | 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 concentration of our loan portfolio in loans collateralized by real estate;
|- |  | -------------------------------------------------------------------------------



| |  | 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;
|- |  | ---------------------------------------------------------------------------------------



| |  | a deterioration or downgrade in the credit quality and credit agency ratings of the securities in the Companys securities portfolio;
|- |  | -------------------------------------------------------------------------------------------------------------------------------------



| |  | 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;
|- |  | -----------------------------------------------------



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##### Table of Contents

| |  | 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.
|- |  | ------------------------------------------------------------------------------------------------------------------------------------------------

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.

Managements Discussion and Analysis of Financial Condition and Results of Operations analyzes the major
elements of the Companys interim consolidated financial statements and accompanying notes. This section should be read in conjunction with the Companys interim consolidated financial statements and accompanying notes included elsewhere
in this report and with the consolidated financial statements and accompanying notes and other detailed information appearing in the Companys Annual Report on Form 10-K for the year ended December 31, 2008.

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. As of September 30, 2009, the Bank operated one hundred fifty-eight (158) full-service banking
locations; with fifty-one (51) in the Greater Houston Consolidated Metropolitan Statistical Area (CMSA), twenty-seven (27) in the South Texas area including Corpus Christi and Victoria, twenty-seven (27) in the Central
Texas area including Austin and San Antonio, twenty (20) in East Texas, nine (9) in Bryan/College Station and twenty-four (24) 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 (281) 269-7199. 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. On January 10, 2008, the Company purchased six (6) branches of Banco Popular North America. On June 1, 2008 the Company purchased 1stChoice Bancorp, Inc. (the 1stChoice acquisition) which added one (1) banking center after consolidation. On November 7, 2008, the
Bank assumed approximately $3.6 billion of deposits and acquired certain assets from the Federal Deposit Insurance Corporation (FDIC), acting in its capacity as receiver for Franklin Bank (the Franklin acquisition or the
Franklin Bank acquisition). The transaction added thirty-three (33) banking centers after consolidations with existing Prosperity Bank locations.



19



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##### Table of Contents

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 $8.96 billion at September 30, 2009 compared with $9.07 billion at December 31, 2008, a
decrease of $115.0 million or 1.3%. Total loans were $3.41 billion at September 30, 2009 compared with $3.57 billion at December 31, 2008, a decrease of $160.8 million or 4.5%. Total deposits were $7.12 billion at September 30, 2009
compared with $7.30 billion December 31, 2008, a decrease of $185.3 million or 2.5%. Shareholders equity increased $71.9 million or 5.7%, to $1.33 billion at September 30, 2009 compared with $1.26 billion at December 31, 2008.

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, 2008. 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. Charge-offs occur when loans are deemed to be uncollectible. The
allowance for credit losses includes allowance allocations calculated in accordance with FASB ASC Topic 310, Receivables, and allowance allocations determined in accordance with FASB ASC Topic 450,
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, 2009, management does not believe any of its goodwill is impaired
as of September 30, 2009. While the Company believes no impairment existed at September 30, 2009 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 accounts for stock-based employee compensation plans using the fair value-based method of
accounting in accordance with FASB ASC Topic 718, Stock Compensation.ASC 718 was effective for companies in 2006; however, the Company had been recognizing compensation expense since January 1, 2003. The Companys results of
operations reflect compensation expense for all employee stock-based compensation, including the unvested portion of stock options granted prior to 2003. ASC 718 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 subjective assumptions.



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Other Than Temporarily Impaired 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 $29.3 million ($0.63 per common share on a diluted basis) for the quarter ended September 30, 2009 compared with $15.4 million ($0.33 per common share
on a diluted basis) for the quarter ended September 30, 2008, an increase in net income of $13.9 million, or 89.8%. Net income for the three months ended September 30, 2008 included 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 8.93% and 5.04%, returns on average assets of 1.32% and 0.91% and efficiency ratios of 44.46% and 45.43% for the
quarters ended September 30, 2009 and 2008, 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, 2009, net income available to common shareholders was $81.3 million ($1.76 per common share on a diluted basis) compared with $61.8 million ($1.37 per common
share on a diluted basis) for the same period in 2008, an increase in net income of $19.5 million or 31.5%. The Company posted returns on average common equity of 8.39% and 6.97%, returns on average assets of 1.22% and 1.25% and efficiency ratios of
47.60% and 45.65% for the nine months ended September 30, 2009 and 2008, respectively.

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 $78.1 million for the quarter ended September 30, 2009
compared with $58.5 million for the quarter ended September 30, 2008, an increase of $19.6 million, or 33.6%. 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 $7.60 billion for the quarter ended September 30, 2009 compared with $5.60 billion for the quarter ended September 30,
2008, an increase of $2.00 billion, or 35.7%. The increase in average interest-earning assets was primarily attributable to increases in average loans and securities in the quarter ended September 30, 2009 compared with the quarter ended
September 30, 2008 resulting from the Franklin Bank acquisition.

The net interest margin on a tax equivalent basis
decreased 7 basis points to 4.08% for the quarter ended September 30, 2009 compared with 4.15% for the quarter ended September 30, 2008. The average rate paid on interest-bearing liabilities decreased 92 basis points from 2.53% for the
quarter ended September 30, 2008 compared with 1.61% for the quarter ended September 30, 2009, while the average yield on earning assets decreased 72 basis points from 6.03% for the quarter ended September 30, 2008 compared with 5.31%
for the quarter ended September 30, 2009. Average interest-bearing liabilities increased $1.75 billion and average interest-earning assets increased $2.00 billion for the same periods.

Net interest income on a tax equivalent basis increased $63.1 million, or 38.0%, to $229.1 million for the nine months ended
September 30, 2009 compared with $166.0 million for the same period in 2008. 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
Franklin Bank 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, 2009 decreased 7 basis
points to 4.03% compared with 4.10% for the same period in 2008. The average rate paid on interest-bearing liabilities decreased 98 basis points from 2.83% for the nine months ended September 30, 2008 compared with 1.85% for the same period in
2009 and the average yield on earning assets decreased 75 basis points from 6.21% for the nine months ended September 30, 2008 compared with 5.46% for the nine months ended September 30, 2009.



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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, 2009 and 2008 and the nine months ended September 30, 2009
and 2008. 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, |          
|                                                          |  | 2009                             |           |   | 2008                |  
|                                                          |  | AverageOutstandingBalance        |           |   | InterestEarned/Paid |   | AverageYield/Rate (4) |  |      | AverageOutstandingBalance |  |   | InterestEarned/Paid |   | AverageYield/Rate (4) |  
|                                                          |  | (Dollars in thousands)           |          
|Assets                                                    |  |                                  |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |        |  |      |  
|Interest-earning assets:                                  |  |                                  |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |        |  |      |  
|Loans                                                     |  | $                                | 3,431,061 |   |                     | $ | 54,809                |  | 6.34 | %                         |  | $ | 3,289,203           |   |                       | $ | 56,925 |  | 6.89 | %
|Securities (1)                                            |  |                                  | 4,062,796 |   |                     |   | 46,812                |  | 4.61 |                           |  |   | 2,292,571           |   |                       |   | 27,834 |  | 4.86 |  
|Federal funds sold and other temporary investments        |  |                                  | 107,008   |   |                     |   | 74                    |  | 0.27 |                           |  |   | 18,854              |   |                       |   | 87     |  | 1.84 |  
|                                                          |  |                                  |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |        |  |      |  
|Total interest-earning assets                             |  |                                  | 7,600,865 |   |                     |   | 101,695               |  | 5.31 | %                         |  |   | 5,600,628           |   |                       |   | 84,846 |  | 6.03 | %
|                                                          |  |                                  |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |        |  |      |  
|Less allowance for credit losses                          |  |                                  | (43,610   | ) |                     |   |                       |  |      |                           |  |   | (33,746             | ) |                       |   |        |  |      |  
|                                                          |  |                                  |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |        |  |      |  
|Total interest-earning assets, net of allowance           |  |                                  | 7,557,255 |   |                     |   |                       |  |      |                           |  |   | 5,566,882           |   |                       |   |        |  |      |  
|Noninterest-earning assets                                |  |                                  | 1,310,292 |   |                     |   |                       |  |      |                           |  |   | 1,234,567           |   |                       |   |        |  |      |  
|                                                          |  |                                  |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |        |  |      |  
|                                                          |  |                                  |           |   |                     |  
|Total assets                                              |  | $                                | 8,867,547 |   |                     |   |                       |  |      |                           |  | $ | 6,801,449           |   |                       |   |        |  |      |  
|                                                          |  |                                  |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |        |  |      |  
|                                                          |  |                                  |           |   |                     |  
|Liabilities and shareholders equity                      |  |                                  |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |        |  |      |  
|Interest-bearing liabilities:                             |  |                                  |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |        |  |      |  
|Interest-bearing demand deposits                          |  | $                                | 1,092,719 |   |                     | $ | 2,253                 |  | 0.82 | %                         |  | $ | 712,741             |   |                       | $ | 1,565  |  | 0.87 | %
|Savings and money market accounts                         |  |                                  | 1,969,427 |   |                     |   | 4,579                 |  | 0.92 |                           |  |   | 1,439,838           |   |                       |   | 6,783  |  | 1.87 |  
|Certificates of deposit                                   |  |                                  | 2,685,834 |   |                     |   | 15,862                |  | 2.34 |                           |  |   | 1,767,712           |   |                       |   | 15,526 |  | 3.49 |  
|Junior subordinated debentures                            |  |                                  | 92,265    |   |                     |   | 879                   |  | 3.78 |                           |  |   | 92,265              |   |                       |   | 1,410  |  | 6.08 |  
|Securities sold under repurchase agreements               |  |                                  | 109,961   |   |                     |   | 320                   |  | 1.15 |                           |  |   | 95,533              |   |                       |   | 631    |  | 2.63 |  
|Federal funds purchased and other borrowings              |  |                                  | 49,539    |   |                     |   | 389                   |  | 3.12 |                           |  |   | 146,172             |   |                       |   | 1,125  |  | 3.06 |  
|                                                          |  |                                  |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |        |  |      |  
|Total interest-bearing liabilities                        |  |                                  | 5,999,745 |   |                     |   | 24,282                |  | 1.61 | %                         |  |   | 4,254,261           |   |                       |   | 27,040 |  | 2.53 | %
|                                                          |  |                                  |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |        |  |      |  
|Noninterest-bearing liabilities:                          |  |                                  |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |        |  |      |  
|Noninterest-bearing demand deposits                       |  |                                  | 1,475,878 |   |                     |   |                       |  |      |                           |  |   | 1,266,924           |   |                       |   |        |  |      |  
|Other liabilities                                         |  |                                  | 77,913    |   |                     |   |                       |  |      |                           |  |   | 55,105              |   |                       |   |        |  |      |  
|                                                          |  |                                  |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |        |  |      |  
|                                                          |  |                                  |           |   |                     |  
|Total liabilities                                         |  |                                  | 7,553,536 |   |                     |   |                       |  |      |                           |  |   | 5,576,290           |   |                       |   |        |  |      |  
|                                                          |  |                                  |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |        |  |      |  
|                                                          |  |                                  |           |   |                     |  
|Shareholders equity                                      |  |                                  | 1,314,011 |   |                     |   |                       |  |      |                           |  |   | 1,225,159           |   |                       |   |        |  |      |  
|                                                          |  |                                  |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |        |  |      |  
|                                                          |  |                                  |           |   |                     |  
|Total liabilities and shareholders' equity                |  | $                                | 8,867,547 |   |                     |   |                       |  |      |                           |  | $ | 6,801,449           |   |                       |   |        |  |      |  
|                                                          |  |                                  |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |        |  |      |  
|                                                          |  |                                  |           |   |                     |  
|Net interest rate spread                                  |  |                                  |           |   |                     |   |                       |  | 3.70 | %                         |  |   |                     |   |                       |   |        |  | 3.50 | %
|                                                          |  |                                  |           |   |                     |  
|Net interest income and margin (2)                        |  |                                  |           |   |                     | $ | 77,413                |  | 4.04 | %                         |  |   |                     |   |                       | $ | 57,806 |  | 4.11 | %
|                                                          |  |                                  |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |        |  |      |  
|Net interest income and margin (tax-equivalent basis) (3) |  |                                  |           |   |                     | $ | 78,111                |  | 4.08 | %                         |  |   |                     |   |                       | $ | 58,471 |  | 4.15 | %
|                                                          |  |                                  |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |        |  |      |  



|(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.
|--- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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|                                                          |  |                                 |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |         |  |      |  
|--------------------------------------------------------- |  | ------------------------------- | --------- | - | ------------------- | - | --------------------- |  | ---- | ------------------------- |  | - | ------------------- | - | --------------------- | - | ------- |  | ---- | -
|                                                          |  | Nine Months Ended September 30, |          
|                                                          |  | 2009                            |           |   | 2008                |  
|                                                          |  | AverageOutstandingBalance       |           |   | InterestEarned/Paid |   | AverageYield/Rate (4) |  |      | AverageOutstandingBalance |  |   | InterestEarned/Paid |   | AverageYield/Rate (4) |  
|                                                          |  | (Dollars in thousands)          |          
|Assets                                                    |  |                                 |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |         |  |      |  
|Interest-earning assets:                                  |  |                                 |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |         |  |      |  
|Loans                                                     |  | $                               | 3,477,972 |   |                     | $ | 165,859               |  | 6.38 | %                         |  | $ | 3,212,176           |   |                       | $ | 171,393 |  | 7.13 | %
|Securities (1)                                            |  |                                 | 4,019,370 |   |                     |   | 143,990               |  | 4.78 |                           |  |   | 2,134,396           |   |                       |   | 78,473  |  | 4.90 |  
|Federal funds sold and other temporary investments        |  |                                 | 98,782    |   |                     |   | 180                   |  | 0.24 |                           |  |   | 61,264              |   |                       |   | 1,424   |  | 3.10 |  
|                                                          |  |                                 |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |         |  |      |  
|Total interest-earning assets                             |  |                                 | 7,596,124 |   |                     |   | 310,029               |  | 5.46 | %                         |  |   | 5,407,836           |   |                       |   | 251,290 |  | 6.21 | %
|                                                          |  |                                 |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |         |  |      |  
|Less allowance for credit losses                          |  |                                 | (40,045   | ) |                     |   |                       |  |      |                           |  |   | (32,839             | ) |                       |   |         |  |      |  
|                                                          |  |                                 |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |         |  |      |  
|Total interest-earning assets, net of allowance           |  |                                 | 7,556,079 |   |                     |   |                       |  |      |                           |  |   | 5,374,997           |   |                       |   |         |  |      |  
|Noninterest-earning assets                                |  |                                 | 1,312,906 |   |                     |   |                       |  |      |                           |  |   | 1,213,656           |   |                       |   |         |  |      |  
|                                                          |  |                                 |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |         |  |      |  
|                                                          |  |                                 |           |   |                     |  
|Total assets                                              |  | $                               | 8,868,985 |   |                     |   |                       |  |      |                           |  | $ | 6,588,653           |   |                       |   |         |  |      |  
|                                                          |  |                                 |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |         |  |      |  
|                                                          |  |                                 |           |   |                     |  
|Liabilities and shareholders equity                      |  |                                 |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |         |  |      |  
|Interest-bearing liabilities:                             |  |                                 |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |         |  |      |  
|Interest-bearing demand deposits                          |  | $                               | 1,069,884 |   |                     | $ | 6,557                 |  | 0.82 | %                         |  | $ | 775,730             |   |                       | $ | 6,338   |  | 1.09 | %
|Savings and money market accounts                         |  |                                 | 1,884,542 |   |                     |   | 15,255                |  | 1.08 |                           |  |   | 1,354,694           |   |                       |   | 20,875  |  | 2.06 |  
|Certificates of deposit                                   |  |                                 | 2,807,532 |   |                     |   | 55,960                |  | 2.66 |                           |  |   | 1,712,402           |   |                       |   | 50,816  |  | 3.96 |  
|Junior subordinated debentures                            |  |                                 | 92,265    |   |                     |   | 2,957                 |  | 4.28 |                           |  |   | 101,429             |   |                       |   | 4,987   |  | 6.57 |  
|Securities sold under repurchase agreements               |  |                                 | 95,488    |   |                     |   | 948                   |  | 1.33 |                           |  |   | 81,390              |   |                       |   | 1,809   |  | 2.97 |  
|Federal funds purchased and other borrowings              |  |                                 | 53,733    |   |                     |   | 1,340                 |  | 3.33 |                           |  |   | 106,572             |   |                       |   | 2,693   |  | 3.38 |  
|                                                          |  |                                 |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |         |  |      |  
|Total interest-bearing liabilities                        |  |                                 | 6,003,444 |   |                     |   | 83,017                |  | 1.85 | %                         |  |   | 4,132,217           |   |                       |   | 87,518  |  | 2.83 | %
|                                                          |  |                                 |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |         |  |      |  
|Noninterest-bearing liabilities:                          |  |                                 |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |         |  |      |  
|Noninterest-bearing demand deposits                       |  |                                 | 1,490,911 |   |                     |   |                       |  |      |                           |  |   | 1,212,379           |   |                       |   |         |  |      |  
|Other liabilities                                         |  |                                 | 82,492    |   |                     |   |                       |  |      |                           |  |   | 61,405              |   |                       |   |         |  |      |  
|                                                          |  |                                 |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |         |  |      |  
|                                                          |  |                                 |           |   |                     |  
|Total liabilities                                         |  |                                 | 7,576,847 |   |                     |   |                       |  |      |                           |  |   | 5,406,001           |   |                       |   |         |  |      |  
|                                                          |  |                                 |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |         |  |      |  
|                                                          |  |                                 |           |   |                     |  
|Shareholders equity                                      |  |                                 | 1,292,138 |   |                     |   |                       |  |      |                           |  |   | 1,182,652           |   |                       |   |         |  |      |  
|                                                          |  |                                 |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |         |  |      |  
|                                                          |  |                                 |           |   |                     |  
|Total liabilities and shareholders equity                |  | $                               | 8,868,985 |   |                     |   |                       |  |      |                           |  | $ | 6,588,653           |   |                       |   |         |  |      |  
|                                                          |  |                                 |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |         |  |      |  
|                                                          |  |                                 |           |   |                     |  
|Net interest rate spread                                  |  |                                 |           |   |                     |   |                       |  | 3.61 | %                         |  |   |                     |   |                       |   |         |  | 3.38 | %
|                                                          |  |                                 |           |   |                     |  
|Net interest income and margin (2)                        |  |                                 |           |   |                     | $ | 227,012               |  | 4.00 | %                         |  |   |                     |   |                       | $ | 163,772 |  | 4.05 | %
|                                                          |  |                                 |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |         |  |      |  
|                                                          |  |                                 |           |   |                     |  
|Net interest income and margin (tax-equivalent basis) (3) |  |                                 |           |   |                     | $ | 229,096               |  | 4.03 | %                         |  |   |                     |   |                       | $ | 165,995 |  | 4.10 | %
|                                                          |  |                                 |           |   |                     |   |                       |  |      |                           |  |   |                     |   |                       |   |         |  |      |  



|(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.
|--- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



23



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##### 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, |       
|                                                   |  | 2009 vs. 2008                    |       
|                                                   |  | Increase (Decrease)Due
to        |        |   | Total |  
|                                                   |  | Volume                           |        |   | Rate  |   |        
|                                                   |  | (Dollars in thousands)           |       
|Interest-earning assets:                           |  |                                  |        |   |       |   |         |   |  |   |        |  
|Loans                                              |  | $                                | 2,455  |   |       | $ | (4,571  | ) |  | $ | (2,116 | )
|Securities                                         |  |                                  | 21,492 |   |       |   | (2,514  | ) |  |   | 18,978 |  
|Federal funds sold and other temporary investments |  |                                  | 407    |   |       |   | (420    | ) |  |   | (13    | )
|                                                   |  |                                  |        |   |       |   |         |   |  |   |        |  
|Total increase in interest income                  |  |                                  | 24,354 |   |       |   | (7,505  | ) |  |   | 16,849 |  
|                                                   |  |                                  |        |   |       |   |         |   |  |   |        |  
|                                                   |  |                                  |       
|Interest-bearing liabilities:                      |  |                                  |        |   |       |   |         |   |  |   |        |  
|Interest-bearing demand deposits                   |  |                                  | 834    |   |       |   | (146    | ) |  |   | 688    |  
|Savings and money market accounts                  |  |                                  | 2,495  |   |       |   | (4,699  | ) |  |   | (2,204 | )
|Certificates of deposit                            |  |                                  | 8,064  |   |       |   | (7,728  | ) |  |   | 336    |  
|Junior subordinated debentures                     |  |                                  |       |   |       |   | (531    | ) |  |   | (531   | )
|Securities sold under repurchase agreements        |  |                                  | 95     |   |       |   | (406    | ) |  |   | (311   | )
|Federal funds purchased and other borrowings       |  |                                  | (744   | ) |       |   | 8       |   |  |   | (736   | )
|                                                   |  |                                  |        |   |       |   |         |   |  |   |        |  
|Total increase in interest expense                 |  |                                  | 10,744 |   |       |   | (13,502 | ) |  |   | (2,758 | )
|                                                   |  |                                  |        |   |       |   |         |   |  |   |        |  
|Increase in net interest income                    |  | $                                | 13,610 |   |       | $ | 5,997   |   |  | $ | 19,607 |  
|                                                   |  |                                  |        |   |       |   |         |   |  |   |        |  
|                                                   | 
|                                                   |  | Nine Months Ended September 30,  |       
|                                                   |  | 2009 vs. 2008                    |       
|                                                   |  | Increase (Decrease)Due
to        |        |   | Total |  
|                                                   |  | Volume                           |        |   | Rate  |   |        
|                                                   |  | (Dollars in thousands)           |       
|Interest-earning assets:                           |  |                                  |        |   |       |   |         |   |  |   |        |  
|Loans                                              |  | $                                | 14,182 |   |       | $ | (19,716 | ) |  | $ | (5,534 | )
|Securities                                         |  |                                  | 69,303 |   |       |   | (3,786  | ) |  |   | 65,517 |  
|Federal funds sold and other temporary investments |  |                                  | 872    |   |       |   | (2,116  | ) |  |   | (1,244 | )
|                                                   |  |                                  |        |   |       |   |         |   |  |   |        |  
|Total increase in interest income                  |  |                                  | 84,357 |   |       |   | (25,618 | ) |  |   | 58,739 |  
|                                                   |  |                                  |        |   |       |   |         |   |  |   |        |  
|                                                   |  |                                  |       
|Interest-bearing liabilities:                      |  |                                  |        |   |       |   |         |   |  |   |        |  
|Interest-bearing demand deposits                   |  |                                  | 2,403  |   |       |   | (2,184  | ) |  |   | 219    |  
|Savings and money market accounts                  |  |                                  | 8,165  |   |       |   | (13,785 | ) |  |   | (5,620 | )
|Certificates of deposit                            |  |                                  | 32,498 |   |       |   | (27,354 | ) |  |   | 5,144  |  
|Junior subordinated debentures                     |  |                                  | (451   | ) |       |   | (1,579  | ) |  |   | (2,030 | )
|Securities sold under repurchase agreements        |  |                                  | 313    |   |       |   | (1,174  | ) |  |   | (861   | )
|Federal funds purchased and other borrowings       |  |                                  | (1,335 | ) |       |   | (18     | ) |  |   | (1,353 | )
|                                                   |  |                                  |        |   |       |   |         |   |  |   |        |  
|Total increase in interest expense                 |  |                                  | 41,593 |   |       |   | (46,094 | ) |  |   | (4,501 | )
|                                                   |  |                                  |        |   |       |   |         |   |  |   |        |  
|Increase (decrease) in net interest income         |  | $                                | 42,764 |   |       | $ | 20,476  |   |  | $ | 63,240 |  
|                                                   |  |                                  |        |   |       |   |         |   |  |   |        |  

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.



24



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##### 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 $7.3 million provision for credit losses for the quarter ended September 30, 2009 and
a $1.7 million provision for the quarter ended September 30, 2008. The Company made a $20.3 million provision for credit losses for the nine months ended September 30, 2009 and a $3.9 million provision for the nine months ended
September 30, 2008. Both increases were primarily due to increased charge-offs and a general weakening of the economy. The ratio of the allowance for credit losses to end of period nonperforming loans was 536.7% at September 30, 2009
compared with 379.7% at December 31, 2008. The ratio of allowance for credit losses to total loans was 1.39% at September 30, 2009 compared with 1.04% at December 31, 2008. For the quarter ended September 30, 2009, net
charge-offs were $2.6 million compared with net charge-offs of $1.8 million for the quarter ended September 30, 2008. Net charge-offs were $9.9 million for the nine months ended September 30, 2009 compared with $4.6 million for the nine
months ended September 30, 2008.

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 rental and currency handling fees. Noninterest income totaled $15.2 million for the three months ended September 30, 2009 compared with $13.1 million for the same period in 2008, an increase
of $2.1 million, or 16.2%. Noninterest income increased $6.5 million, or 16.8%, to $45.4 million for the nine months ended September 30, 2009 compared with $38.9 million for the same period in 2008. The increases during both periods were
primarily due to increases in insufficient funds charges and customer service charges which mainly resulted from an increase in the number of accounts due to the acquisition of Franklin Bank and increases in net gain on sale of other real estate. As
of September 30, 2009, the Franklin Bank acquisition added approximately 88,000 deposit accounts.

The net gain on sale
of other real estate was $115,000 for the three months ended September 30, 2009 compared with a net loss of $210,000 for the three months ended September 30, 2008. The net gain on sale of other real estate was $552,000 for the nine months
ended September 30, 2009 compared with a net loss of $648,000 for the same period in 2008.

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



|                                             |  |                                 |        |   |                                |   |        |      |  |      |        |  |   |        |  
|-------------------------------------------- |  | ------------------------------- | ------ | - | ------------------------------ | - | ------ | ---- |  | ---- | ------ |  | - | ------ | -
|                                             |  | Three Months EndedSeptember 30, |        |   | Nine Months EndedSeptember 30, |  
|                                             |  | 2009                            |        |   | 2008                           |   |        | 2009 |  | 2008 |       
|                                             |  | (Dollars in thousands)          |       
|Service charges on deposit accounts          |  | $                               | 13,554 |   |                                | $ | 11,348 |      |  | $    | 38,789 |  | $ | 32,581 |  
|Banking-related service fees                 |  |                                 | 500    |   |                                |   | 522    |      |  |      | 1,491  |  |   | 1,446  |  
|Brokered mortgage income                     |  |                                 | 59     |   |                                |   | 74     |      |  |      | 269    |  |   | 296    |  
|Investment and trust income                  |  |                                 | 99     |   |                                |   | 104    |      |  |      | 467    |  |   | 272    |  
|Income from leased assets                    |  |                                 | 78     |   |                                |   | 315    |      |  |      | 245    |  |   | 997    |  
|Bank owned life insurance income (BOLI)      |  |                                 | 336    |   |                                |   | 408    |      |  |      | 1,002  |  |   | 1,313  |  
|Net (loss) gain on sale of assets            |  |                                 | (20    | ) |                                |   | 34     |      |  |      | 277    |  |   | 715    |  
|Net gain on sale of securities               |  |                                 |       |   |                                |   |       |      |  |      |       |  |   |       |  
|Net gain (loss) on sale of other real estate |  |                                 | 115    |   |                                |   | (210   | )    |  |      | 552    |  |   | (648   | )
|Net gain on sale of held for sale loans      |  |                                 |       |   |                                |   | 46     |      |  |      |       |  |   | 229    |  
|Other noninterest income                     |  |                                 | 515    |   |                                |   | 476    |      |  |      | 2,294  |  |   | 1,661  |  
|                                             |  |                                 |        |   |                                |   |        |      |  |      |        |  |   |        |  
|Total noninterest income                     |  | $                               | 15,236 |   |                                | $ | 13,117 |      |  | $    | 45,386 |  | $ | 38,862 |  
|                                             |  |                                 |        |   |                                |   |        |      |  |      |        |  |   |        |  

Noninterest Expense

Noninterest expense totaled $41.2 million for the quarter ended September 30, 2009 compared with $46.2 million for the quarter ended
September 30, 2008, a decrease of $5.0 million, or 10.9%. The decrease 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 during
the third quarter of 2008, partially offset by increases in salaries and employee benefits, increases in FDIC insurance premiums and increases in general operating expenses related to the acquisition of Franklin Bank. Noninterest



25



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##### Table of Contents

expense totaled $129.5 million for the nine months ended September 30, 2009 compared with $106.2 million for the nine months ended September 30, 2008, an increase of $23.3 million, or
22.0%. The increase was primarily due to increases in salaries and employee benefits and increases in general operating expenses and occupancy and equipment expenses related to the acquisition of Franklin Bank and increases in FDIC insurance
premiums, partially offset by the $14.0 million pre-tax impairment charge on the write-down of Fannie Mae and Freddie Mac perpetual preferred securities in 2008. The following table presents, for the periods indicated, the major categories of
noninterest expense:



|                                              |  |                                 |        |                                |   |        |  |      |         |  |   |        
|--------------------------------------------- |  | ------------------------------- | ------ | ------------------------------ | - | ------ |  | ---- | ------- |  | - | -------
|                                              |  | Three Months EndedSeptember 30, |        | Nine Months EndedSeptember 30,
|                                              |  | 2009                            |        | 2008                           |   | 2009   |  | 2008
|                                              |  | (Dollars in thousands)         
|                                              |  |                                 |        |                               
|Salaries and employee benefits (1)            |  | $                               | 21,507 |                                | $ | 17,526 |  | $    | 64,649  |  | $ | 50,407 
|                                              |  |                                 |        |                                |   |        |  |      |         |  |   |        
|Non-staff expenses:                           |  |                                 |        |                                |   |        |  |      |         |  |   |        
|Occupancy and equipment expense               |  |                                 | 3,624  |                                |   | 3,088  |  |      | 11,116  |  |   | 8,765  
|Depreciation                                  |  |                                 | 2,100  |                                |   | 1,955  |  |      | 6,170   |  |   | 5,812  
|Data processing                               |  |                                 | 1,446  |                                |   | 1,319  |  |      | 5,063   |  |   | 3,971  
|Communications expense                        |  |                                 | 2,034  |                                |   | 1,631  |  |      | 6,365   |  |   | 4,800  
|Professional fees                             |  |                                 | 637    |                                |   | 486    |  |      | 2,004   |  |   | 1,030  
|Regulatory assessments and FDIC insurance     |  |                                 | 2,436  |                                |   | 346    |  |      | 11,189  |  |   | 892    
|Ad valorem and franchise taxes                |  |                                 | 934    |                                |   | 750    |  |      | 2,808   |  |   | 2,111  
|Core deposit intangibles amortization         |  |                                 | 2,479  |                                |   | 2,562  |  |      | 7,635   |  |   | 7,513  
|Impairment charge on write-down of securities |  |                                 |       |                                |   | 14,025 |  |      |        |  |   | 14,025 
|Other                                         |  |                                 | 4,004  |                                |   | 2,542  |  |      | 12,525  |  |   | 6,884  
|                                              |  |                                 |        |                                |   |        |  |      |         |  |   |        
|Total non-staff expenses                      |  |                                 | 19,694 |                                |   | 28,704 |  |      | 64,875  |  |   | 55,803 
|                                              |  |                                 |        |                                |   |        |  |      |         |  |   |        
|                                              |  |                                 |        |                               
|Total noninterest expense                     |  | $                               | 41,201 |                                | $ | 46,230 |  | $    | 129,524 |  | $ | 106,210
|                                              |  |                                 |        |                                |   |        |  |      |         |  |   |        



|(1) | Includes stock-based compensation expense of $267,000 and $470,000 for the three months ended September 30, 2009 and 2008, respectively, and $887,000 and $1.1
million for the nine months ended September 30, 2009 and 2008, respectively.
|--- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Salaries and employee benefit
expenses were $21.5 million for the quarter ended September 30, 2009 compared with $17.5 million for the quarter ended September 30, 2008, an increase of $4.0 million, or 22.7%. For the nine months ended September 30, 2009, salaries
and employee benefit expenses were $64.7 million, an increase of 14.2 million or 28.3% compared with $50.4 million for the nine months ended September 30, 2008. The increase during both periods was principally due to an increase in staff
related to the acquisition of Franklin Bank, routine annual salary increases and incentive programs. The number of full-time equivalent (FTE) associates employed by the Company was 1,608 at September 30, 2009 and 1,366 at September 30,
2008.

Non-staff expenses decreased $9.0 million, or 31.4%, to $19.7 million for the quarter ended September 30, 2009
compared with $28.7 million during the same period in 2008. The decrease 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 during the
third quarter of 2008, partially offset by increases in general operating expenses related to the acquisition of Franklin Bank and increases in FDIC insurance premiums. Non-staff expenses increased $9.1 million, or 16.3%, to $64.9 million for the
nine months ended September 30, 2009 compared to $55.8 million during the same period in 2008. The increase was primarily due to increases in general operating expenses and occupancy and equipment expenses related to the acquisition of Franklin
Bank and increases in FDIC insurance premiums, including a special assessment of $4.3 million accrued as of June 30, 2009, partially offset by 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 in 2008.

Income Taxes

Income tax expense increased $7.3 million, or 97.1%, to $14.9 million for the quarter ended September 30, 2009 compared with $7.5
million for the same period in 2008. For the nine months ended September 30, 2009, income tax expense totaled $41.3 million, an increase of $10.6 million or 34.3% compared with $30.7 million for the same period in 2008. Both increases were
primarily attributable to higher pretax net earnings for the quarter and nine months ended September 30, 2009 when compared to the same periods in 2008. The effective tax rates for the three months ended September 30, 2009 and 2008 and the
nine months ended September 30, 2009 and 2008 were 33.7%, 32.8%, 33.7% and 33.2%, respectively.



26



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##### Table of Contents

FINANCIAL CONDITION

Loan Portfolio

Total loans were $3.41 billion at September 30, 2009, a decrease of $160.8 million or 4.5% compared with $3.57 billion at December 31, 2008.

The following table summarizes the loan portfolio of the Company by type of loan as of September 30, 2009 and December 31, 2008:



|                                    |  |                        |           |         |                  |   |        |   |           |  |       |  
|----------------------------------- |  | ---------------------- | --------- | ------- | ---------------- | - | ------ | - | --------- |  | ----- | -
|                                    |  | September 30,2009      |           |         | December 31,2008 |  
|                                    |  | Amount                 |           | Percent |                  |   | Amount |   | Percent   | 
|                                    |  | (Dollars in thousands) |          
|Commercial and industrial           |  | $                      | 415,746   |         | 12.2             | % |        | $ | 482,476   |  | 13.5  | %
|Real estate:                        |  |                        |           |         |                  |   |        |   |           |  |       |  
|Construction and land development   |  |                        | 564,106   |         | 16.6             |   |        |   | 666,081   |  | 18.7  |  
|1-4 family residential              |  |                        | 692,885   |         | 20.3             |   |        |   | 668,097   |  | 18.7  |  
|Home equity                         |  |                        | 116,873   |         | 3.4              |   |        |   | 107,048   |  | 3.0   |  
|Commercial mortgages                |  |                        | 1,262,242 |         | 37.1             |   |        |   | 1,268,340 |  | 35.6  |  
|Farmland                            |  |                        | 95,884    |         | 2.8              |   |        |   | 96,970    |  | 2.7   |  
|Multifamily residential             |  |                        | 74,212    |         | 2.2              |   |        |   | 75,063    |  | 2.1   |  
|Agriculture                         |  |                        | 49,292    |         | 1.4              |   |        |   | 48,679    |  | 1.3   |  
|Consumer (net of unearned discount) |  |                        | 110,795   |         | 3.3              |   |        |   | 137,639   |  | 3.9   |  
|Other                               |  |                        | 24,102    |         | 0.7              |   |        |   | 16,664    |  | 0.5   |  
|                                    |  |                        |           |         |                  |   |        |   |           |  |       |  
|Total loans                         |  | $                      | 3,406,137 |         | 100.0            | % |        | $ | 3,567,057 |  | 100.0 | %
|                                    |  |                        |           |         |                  |   |        |   |           |  |       |  

Nonperforming Assets

The Company had $21.9 million in nonperforming assets at September 30, 2009 and $14.4 million in nonperforming assets at
December 31, 2008, an increase of $7.6 million or 52.6%. The ratio of nonperforming assets to loans and other real estate was 0.64% at September 30, 2009 compared with 0.40% at December 31, 2008.

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.

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



|                                                          |  |                        |        |   |                  |   |        |  
|--------------------------------------------------------- |  | ---------------------- | ------ | - | ---------------- | - | ------ | -
|                                                          |  | September 30,2009      |        |   | December 31,2008 |  
|                                                          |  | (Dollars in thousands) |       
|                                                          |  |                       
|Nonaccrual loans                                          |  | $                      | 2,878  |   |                  | $ | 2,142  |  
|Accruing loans 90 or more days past due                   |  |                        | 5,938  |   |                  |   | 7,594  |  
|                                                          |  |                        |        |   |                  |   |        |  
|Total nonperforming loans                                 |  |                        | 8,816  |   |                  |   | 9,736  |  
|Repossessed assets                                        |  |                        | 366    |   |                  |   | 182    |  
|Other real estate                                         |  |                        | 12,738 |   |                  |   | 4,450  |  
|                                                          |  |                        |        |   |                  |   |        |  
|Total nonperforming assets                                |  | $                      | 21,920 |   |                  | $ | 14,368 |  
|                                                          |  |                        |        |   |                  |   |        |  
|Nonperforming assets to total loans and other real estate |  |                        | 0.64   | % |                  |   | 0.40   | %



27



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##### Table of Contents

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, 2009, the allowance for credit losses amounted to $47.3 million, or 1.39% of total loans, compared with $37.0 million, or 1.04% of total
loans, at December 31, 2008.

Set forth below is an analysis of the allowance for credit losses for the nine months ended
September 30, 2009 and the year ended December 31, 2008:



|                                                        |  |                                                      |           |   |                                              |   |           |  
|------------------------------------------------------- |  | ---------------------------------------------------- | --------- | - | -------------------------------------------- | - | --------- | -
|                                                        |  | As of and for theNine Months EndedSeptember 30,
2009 |           |   | As of and for theYear EndedDecember 31, 2008 |  
|                                                        |  | (Dollars in thousands)                               |          
|                                                        |  |                                                     
|Average loans outstanding                               |  | $                                                    | 3,477,972 |   |                                              | $ | 3,250,447 |  
|                                                        |  |                                                      |           |   |                                              |   |           |  
|                                                        |  |                                                     
|Gross loans outstanding at end of period                |  | $                                                    | 3,406,137 |   |                                              | $ | 3,567,057 |  
|                                                        |  |                                                      |           |   |                                              |   |           |  
|                                                        |  |                                                     
|Allowance for credit losses at beginning of period      |  | $                                                    | 36,970    |   |                                              | $ | 32,543    |  
|Balance acquired with acquisitions                      |  |                                                      |          |   |                                              |   | 2,182     |  
|Provision for credit losses                             |  |                                                      | 20,275    |   |                                              |   | 9,867     |  
|Charge-offs:                                            |  |                                                      |           |   |                                              |   |           |  
|Commercial and industrial                               |  |                                                      | (1,962    | ) |                                              |   | (2,799    | )
|Real estate and agriculture                             |  |                                                      | (6,807    | ) |                                              |   | (3,650    | )
|Consumer                                                |  |                                                      | (2,294    | ) |                                              |   | (2,733    | )
|Recoveries:                                             |  |                                                      |           |   |                                              |   |           |  
|Commercial and industrial                               |  |                                                      | 181       |   |                                              |   | 308       |  
|Real estate and agriculture                             |  |                                                      | 226       |   |                                              |   | 220       |  
|Consumer                                                |  |                                                      | 723       |   |                                              |   | 1,032     |  
|                                                        |  |                                                      |           |   |                                              |   |           |  
|Net charge-offs                                         |  |                                                      | (9,933    | ) |                                              |   | (7,622    | )
|                                                        |  |                                                      |           |   |                                              |   |           |  
|Allowance for credit losses at end of period            |  | $                                                    | 47,312    |   |                                              | $ | 36,970    |  
|                                                        |  |                                                      |           |   |                                              |   |           |  
|Ratio of allowance to end of period loans               |  |                                                      | 1.39      | % |                                              |   | 1.04      | %
|Ratio of net charge-offs to average loans (annualized)  |  |                                                      | 0.38      | % |                                              |   | 0.23      | %
|Ratio of allowance to end of period nonperforming loans |  |                                                      | 536.7     | % |                                              |   | 379.7     | %

Securities

Carrying cost of securities totaled $4.26 billion at September 30, 2009 compared with $4.16 billion at December 31, 2008, an
increase of $94.7 million or 2.3%. At September 30, 2009, securities represented 47.5% of total assets compared with 45.9% of total assets at December 31, 2008.



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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 30,2009 |           | December 31,2008
|                                                                     |  | (In thousands)   
|U.S. Treasury securities and obligations of U.S. government agencies |  | $                 | 46,379    |                  | $ | 151,147  
|States and political subdivisions                                    |  |                   | 82,179    |                  |   | 84,569   
|Corporate debt securities                                            |  |                   | 3,226     |                  |   | 3,221    
|Collateralized mortgage obligations                                  |  |                   | 316,589   |                  |   | 179,389  
|Mortgage-backed securities                                           |  |                   | 3,764,707 |                  |   | 3,711,629
|Qualified Zone Academy Bond (QZAB)                                   |  |                   | 8,000     |                  |   | 8,000    
|Equity securities                                                    |  |                   | 7,288     |                  |   | 7,288    
|                                                                     |  |                   |           |                  |   |          
|Total amortized cost                                                 |  | $                 | 4,228,368 |                  | $ | 4,145,243
|                                                                     |  |                   |           |                  |   |          
|Total fair value                                                     |  | $                 | 4,371,729 |                  | $ | 4,226,225
|                                                                     |  |                   |           |                  |   |          

Management evaluates securities for other-than-temporary impairment
(OTTI) at least on a quarterly basis, and more frequently when economic or market conditions warrant such an evaluation. The investment securities portfolio is evaluated for OTTI by segregating the portfolio into two general segments and
applying the appropriate OTTI model. Investment securities classified as available for sale or held-to-maturity are generally evaluated for OTTI under FASB ASC Topic 320, Investments- Debt and Equity Securities. Certain purchased beneficial
interests, including non-agency mortgage-backed securities, asset-backed securities, and collateralized debt obligations, that had credit ratings at the time of purchase of below AA are evaluated using the model outlined in ASC Topic 325,
Investments-Other. The Company currently does not own any securities that are accounted for under ASC Topic 325.

In
determining OTTI under ASC Topic 320, management considers many factors, including: (1) the length of time and the extent to which the fair value has been less than cost, (2) the financial condition and near-term prospects of the issuer,
(3) whether the market decline was affected by macroeconomic conditions, and (4) whether the entity has the intent to sell the debt security or more likely than not will be required to sell the debt security before its anticipated
recovery. The assessment of whether an other-than-temporary decline exists involves a high degree of subjectivity and judgment and is based on the information available to management at a point in time. If applicable, the second segment of the
portfolio uses the OTTI guidance provided by ASC Topic 325 that is specific to purchased beneficial interests that, on the purchase date, were rated below AA. Under the ASC Topic 325 model, the Company compares the present value of the remaining
cash flows as estimated at the preceding evaluation date to the current expected remaining cash flows. An OTTI is deemed to have occurred if there has been an adverse change in the remaining expected future cash flows.

When OTTI occurs under either model, the amount of the other-than-temporary-impairment recognized in earnings depends on whether an entity
intends to sell the security or more likely than not will be required to sell the security before recovery of its amortized cost basis less any current-period credit loss. If an entity intends to sell or more likely than not will be required to sell
the security before recovery of its amortized cost basis less any current-period credit loss, the OTTI shall be recognized in earnings equal to the entire difference between the investments amortized cost basis and its fair value at the
balance sheet date. If an entity does not intend to sell the security and it is not more likely than not that the entity will be required to sell the security before recovery of its amortized cost basis less any current-period loss, the OTTI shall
be separated into the amount representing the credit loss and the amount related to all other factors. The amount of the total OTTI related to the credit loss is determined based on the present value of cash flows expected to be collected and is
recognized in earnings. The amount of the total OTTI related to other factors shall be recognized in other comprehensive income, net of applicable taxes. The previous amortized cost basis less the OTTI recognized in earnings shall become the new
amortized cost basis of the investment.

Management believes the Company does not intend to sell any debt securities or more
likely than not will not be required to sell any debt securities before their anticipated recovery, at which time the Company will receive full value for the securities. Furthermore, 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, 2009 for a period of time sufficient for an entire recovery of the cost basis of the securities. The unrealized losses are largely due to increases in market
interest rates over the yields available at the time the underlying securities were purchased. The fair value is expected to recover as the securities approach their maturity date or repricing date or if market yields for such investments decline.
Management does not believe any of the securities are impaired due to reasons of credit quality. Accordingly, as of September 30, 2009, management believes any impairment in the Companys securities are temporary and no impairment loss has
been realized in the Companys consolidated income statement.



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The following tables present the amortized cost and fair value of securities classified as
available for sale at September 30, 2009:



|                                                                      |  |                        |         |                      |   |                       |  |   |           |   |  |   |        
|--------------------------------------------------------------------- |  | ---------------------- | ------- | -------------------- | - | --------------------- |  | - | --------- | - |  | - | -------
|                                                                      |  | September 30, 2009    
|                                                                      |  | AmortizedCost          |         | GrossUnrealizedGains |   | GrossUnrealizedLosses |  |   | FairValue
|                                                                      |  | (Dollars in thousands)
|                                                                      |  |                        |         |                     
|U.S. Treasury securities and obligations of U.S. government agencies. |  | $                      | 1,017   |                      | $ | 32                    |  | $ |          |   |  | $ | 1,049  
|                                                                      |  |                        |         |                     
|States and political subdivisions (including QZAB)                    |  |                        | 57,283  |                      |   | 2,980                 |  |   | (303      | ) |  |   | 59,960 
|                                                                      |  |                        |         |                     
|Corporate debt securities and other                                   |  |                        | 9,014   |                      |   | 16                    |  |   |          |   |  |   | 9,030  
|                                                                      |  |                        |         |                     
|Collateralized mortgage obligations                                   |  |                        | 1,224   |                      |   |                      |  |   | (25       | ) |  |   | 1,199  
|                                                                      |  |                        |         |                     
|Mortgage-backed securities                                            |  |                        | 535,291 |                      |   | 24,093                |  |   | (105      | ) |  |   | 559,279
|                                                                      |  |                        |         |                      |   |                       |  |   |           |   |  |   |        
|Total                                                                 |  | $                      | 603,829 |                      | $ | 27,121                |  | $ | (433      | ) |  | $ | 630,517
|                                                                      |  |                        |         |                      |   |                       |  |   |           |   |  |   |        

The following tables present the amortized cost and fair value of securities
classified as held-to-maturity at September 30, 2009:



|                                                                     |  |                        |           |                      |   |                       |  |   |           |   |  |   |          
|-------------------------------------------------------------------- |  | ---------------------- | --------- | -------------------- | - | --------------------- |  | - | --------- | - |  | - | ---------
|                                                                     |  | September 30, 2009    
|                                                                     |  | AmortizedCost          |           | GrossUnrealizedGains |   | GrossUnrealizedLosses |  |   | FairValue
|                                                                     |  | (Dollars in thousands)
|                                                                     |  |                        |           |                     
|U.S. Treasury securities and obligations of U.S. government agencies |  | $                      | 45,362    |                      | $ | 1,865                 |  | $ |          |   |  | $ | 47,227   
|                                                                     |  |                        |           |                     
|States and political subdivisions                                    |  |                        | 32,896    |                      |   | 901                   |  |   | (1,134    | ) |  |   | 32,663   
|                                                                     |  |                        |           |                     
|Corporate debt securities                                            |  |                        | 1,500     |                      |   |                      |  |   | (15       | ) |  |   | 1,485    
|                                                                     |  |                        |           |                     
|Collateralized mortgage obligations                                  |  |                        | 315,365   |                      |   | 3,346                 |  |   | (1,178    | ) |  |   | 317,533  
|                                                                     |  |                        |           |                     
|Mortgage-backed securities                                           |  |                        | 3,229,417 |                      |   | 113,074               |  |   | (187      | ) |  |   | 3,342,304
|                                                                     |  |                        |           |                      |   |                       |  |   |           |   |  |   |          
|Total                                                                |  | $                      | 3,624,540 |                      | $ | 119,186               |  | $ | (2,514    | ) |  | $ | 3,741,212
|                                                                     |  |                        |           |                      |   |                       |  |   |           |   |  |   |          



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Bank Premises and Equipment

Premises and equipment, net of accumulated depreciation, totaled $149.7 million and $123.6 million at September 30, 2009 and
December 31, 2008, respectively, an increase of $26.1 million or 21.1%. The increase was primarily due to the former Franklin Bank locations that were not acquired by the Bank until the first quarter of 2009 and totaled $29.3 million.

Deposits

Total deposits were $7.12 billion at September 30, 2009 compared with $7.30 billion at December 31, 2008, a decrease of $185.3 million or 2.5%. At September 30, 2009, noninterest-bearing
deposits accounted for approximately 20.7% of total deposits compared with 20.9% of total deposits at December 31, 2008. Interest-bearing demand deposits totaled $5.64 billion or 79.3% of total deposits at September 30, 2009 compared with
$5.78 billion or 79.1% of total deposits at December 31, 2008.

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



|                                |  |                                    |           |             |                            |   |                |   |             |  |      |  
|------------------------------- |  | ---------------------------------- | --------- | ----------- | -------------------------- | - | -------------- | - | ----------- |  | ---- | -
|                                |  | Nine Months EndedSeptember 30,2009 |           |             | Year EndedDecember 31,2008 |  
|                                |  | AverageBalance                     |           | AverageRate |                            |   | AverageBalance |   | AverageRate | 
|                                |  | (Dollars in thousands)             |          
|                                |  |                                    |           |            
|Interest-bearing demand         |  | $                                  | 1,069,884 |             | 0.82                       | % |                | $ | 791,739     |  | 1.01 | %
|Regular savings                 |  |                                    | 319,773   |             | 0.58                       |   |                |   | 253,090     |  | 0.74 |  
|Money market savings            |  |                                    | 1,564,769 |             | 1.18                       |   |                |   | 1,158,052   |  | 2.24 |  
|Time deposits                   |  |                                    | 2,807,532 |             | 2.66                       |   |                |   | 1,997,152   |  | 3.60 |  
|                                |  |                                    |           |             |                            |   |                |   |             |  |      |  
|Total interest-bearing deposits |  |                                    | 5,761,958 |             | 1.80                       |   |                |   | 4,200,033   |  | 2.56 |  
|Noninterest-bearing deposits    |  |                                    | 1,490,911 |             |                           |   |                |   | 1,271,408   |  |     |  
|                                |  |                                    |           |             |                            |   |                |   |             |  |      |  
|Total deposits                  |  | $                                  | 7,252,869 |             | 1.43                       | % |                | $ | 5,471,441   |  | 1.97 | %
|                                |  |                                    |           |             |                            |   |                |   |             |  |      |  

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, 2009, the Company had $226.0 million in FHLB advances and $27.9 million in FHLB long-term
notes payable compared with $200.0 million in FHLB advances and $29.4 million in FHLB long-term notes payable at December 31, 2008. The weighted average interest rate paid on the FHLB notes payable at period end was 5.4%. The maturity dates on
the FHLB notes payable range from the years 2009 to 2028 and have interest rates ranging from 3.08% to 6.10%. The highest outstanding balance of FHLB advances during 2009 was $230.0 million compared with $280.0 million during 2008. The Company had
no federal funds purchased at September 30, 2009 or December 31, 2008.

At September 30, 2009, the Company had
$100.6 million in securities sold under repurchase agreements compared with $96.0 million at December 31, 2008, an increase of $4.6 million or 4.8%. The increase was due to normal customer activity.

The following table presents the Companys borrowings at September 30, 2009 and December 31, 2008:



|                                            |  |                   |         |                  |   |        
|------------------------------------------- |  | ----------------- | ------- | ---------------- | - | -------
|                                            |  | September 30,2009 |         | December 31,2008
|                                            |  | (In thousands)   
|                                            |  |                  
|FHLB advances                               |  | $                 | 226,000 |                  | $ | 200,000
|FHLB long-term notes payable                |  |                   | 27,855  |                  |   | 29,395 
|                                            |  |                   |         |                  |   |        
|Total other borrowings                      |  |                   | 253,855 |                  |   | 229,395
|Securities sold under repurchase agreements |  |                   | 100,636 |                  |   | 96,017 
|                                            |  |                   |         |                  |   |        
|Total                                       |  | $                 | 354,491 |                  | $ | 325,412
|                                            |  |                   |         |                  |   |        



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Junior Subordinated Debentures

At September 30, 2009 and December 31, 2008, the Company had outstanding $92.3 million in junior subordinated debentures issued to
the Companys unconsolidated subsidiary trusts.

A summary of pertinent information related to the Companys eight
issues of junior subordinated debentures outstanding at September 30, 2009 is set forth in the table below:



|                               |  |                |  |                                     |            |                  |                                            |                                      |   |                 |  |               
|------------------------------ |  | -------------- |  | ----------------------------------- | ---------- | ---------------- | ------------------------------------------ | ------------------------------------ | - | --------------- |  | --------------
|Description                    |  | Issuance Date  |  | TrustPreferredSecuritiesOutstanding |            | Interest Rate(1) |                                            | JuniorSubordinatedDebt Owed toTrusts |   | MaturityDate(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 |                  | 3 month LIBOR + 2.85%(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  |                  | 3 month LIBOR + 2.85%(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, 2009 was 0.287%.
|--- | ----------------------------------------------------------------

|(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 3-month LIBOR plus
3.00%.
|--- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------

|(4) | The debentures bore a fixed interest rate of 6.50% until December 30, 2008, when the rate began to float on a quarterly basis based on the 3-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 bore a fixed interest rate until January 23, 2009, when the rate began to float on a quarterly basis based on the 3-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 largest source of funds is deposits and its largest use of funds is loans. The Company does not expect a change in the source or use of its funds in the foreseeable future.
Although access to purchased funds from correspondent banks and overnight advances from the Federal Home Loan Bank-Dallas 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, has generally created an adequate liquidity position.

As of September 30, 2009, the Company had outstanding $509.9 million in commitments to extend credit and $15.0 million in commitments
associated with outstanding standby letters of credit. Since commitments associated with letters of credit and commitments to extend credit may expire unused, the total outstanding may not necessarily reflect the actual future cash funding
requirements.



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The Company has no exposure to future cash requirements associated with known uncertainties
or capital expenditures of a material nature.

Asset liquidity is provided by cash and assets which are readily marketable or
which will mature in the near future. As of September 30, 2009, the Company had cash and cash equivalents of $156.9 million compared with $228.6 million at December 31, 2008, a decrease of $71.8 million. The decrease was primarily due to a
decrease in deposits of $190.3 million, purchases of securities of $1.55 billion, purchases of premises and equipment of $33.6 million, dividends paid of $19.0 million and a decrease in other liabilities of $33.3 million, partially offset by
proceeds from the maturities and repayments of securities of $1.46 billion, a decrease in loans of $125.5 million, net earnings of $81.3 million, proceeds from the sale of bank premises, equipment and ORE of $19.7 million, a provision for credit
losses of $20.3 million, proceeds from short-term borrowings of $26.0 million and depreciation and amortization of $13.8 million.

Contractual Obligations

The following table summarizes the Companys contractual obligations and other
commitments to make future payments as of September 30, 2009 (other than deposit obligations). The payments do not include pre-payment options that may be available to the Company. 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, 2009 are summarized below. Payments for junior subordinated debentures include interest of $71.9 million that
will be paid over the future periods. The future interest payments were calculated using the current rate in effect at September 30, 2009. With respect to floating interest rates, the payments were determined based on the 3-month LIBOR in
effect at September 30, 2009. The current principal balance of the junior subordinated debentures at September 30, 2009 was $92.3 million. Payments for FHLB notes payable include interest of $5.4 million that will be paid over the future
periods. Payments related to leases are based on actual payments specified in underlying contracts.



|                                     |  |                        |       |                 |   |                 |  |            |        |       |   |         |  |   |        
|------------------------------------ |  | ---------------------- | ----- | --------------- | - | --------------- |  | ---------- | ------ | ----- | - | ------- |  | - | -------
|                                     |  | Payments due in:      
|                                     |  | RemainingFiscal 2009   |       | Fiscal2010-2011 |   | Fiscal2012-2013 |  | Thereafter |        | Total
|                                     |  | (Dollars in thousands)
|                                     |  |                        |       |                 |  
|Junior subordinated debentures       |  | $                      | 805   |                 | $ | 6,444           |  | $          | 6,444  |       | $ | 153,722 |  | $ | 167,415
|Federal Home Loan Bank notes payable |  |                        | 1,146 |                 |   | 15,703          |  |            | 3,356  |       |   | 13,048  |  |   | 33,253 
|Operating leases                     |  |                        | 1,150 |                 |   | 7,671           |  |            | 5,376  |       |   | 2,282   |  |   | 16,479 
|                                     |  |                        |       |                 |   |                 |  |            |        |       |   |         |  |   |        
|Total                                |  | $                      | 3,101 |                 | $ | 29,818          |  | $          | 15,176 |       | $ | 169,052 |  | $ | 217,147
|                                     |  |                        |       |                 |   |                 |  |            |        |       |   |         |  |   |        

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, 2009 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 2009   |        | Fiscal2010-2011 |   | Fiscal2012-2013 |  | Thereafter |       | Total
|                             |  | (Dollars in thousands)
|                             |  |                        |        |                 |  
|Standby letters of credit    |  | $                      | 4,735  |                 | $ | 9,624           |  | $          | 587   |       | $ |        |  | $ | 14,946 
|Commitments to extend credit |  |                        | 79,006 |                 |   | 274,850         |  |            | 6,009 |       |   | 150,079 |  |   | 509,944
|                             |  |                        |        |                 |   |                 |  |            |       |       |   |         |  |   |        
|Total                        |  | $                      | 83,741 |                 | $ | 284,474         |  | $          | 6,596 |       | $ | 150,079 |  | $ | 524,890
|                             |  |                        |        |                 |   |                 |  |            |       |       |   |         |  |   |        

Capital Resources

Total shareholders equity was $1.33 billion at September 30, 2009 compared with $1.26 billion at December 31, 2008, an
increase of $71.9 million or 5.7%. The increase was due primarily to net earnings of $81.3 million, the issuance of



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common stock in connection with the exercise of stock options of $1.3 million and a change in unrealized gain on available for sale securities of $7.5 million, partially offset by dividends paid
of $19.0 million for the nine months ended September 30, 2009.

Both the Board of Governors of the Federal Reserve System
with respect to the Company, and the Federal Deposit Insurance Corporation 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, 2009:



|                                         |  |       |  
|---------------------------------------- |  | ----- | -
|Consolidated Capital Ratios:             |  |       |  
|Total capital (to risk weighted assets)  |  | 13.01 | %
|Tier 1 capital (to risk weighted assets) |  | 11.85 | %
|Tier 1 capital (to average assets)       |  | 6.09  | %

As of September 30, 2009, the Banks risk-based capital ratios were above
the levels required for the Bank to be designated as well capitalized by the FDIC. To be designated as well capitalized, the minimum ratio requirements for the Banks total risk-based capital, Tier 1 risk-based capital,
and Tier 1 to average assets (leverage) capital ratios must be 10.0%, 6.0% and 5.0%, respectively. 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, 2009:



|                                         |  |       |  
|---------------------------------------- |  | ----- | -
|Capital Ratios (Bank Only):              |  |       |  
|Total capital (to risk weighted assets)  |  | 12.54 | %
|Tier 1 capital (to risk weighted assets) |  | 11.38 | %
|Tier 1 capital (to average assets)       |  | 5.85  | %

The Bank is participating in the deposit insurance component of the FDIC Temporary
Liquidity Guarantee Program (TGLP), which increases deposit insurance on noninterest-bearing transaction account deposits on balances up to $250,000 through December 31, 2013. The Company and the Bank elected to not participate in
the U.S. Department of Treasury Capital Purchase Program, which is a part of the Troubled Asset Relief Program.



|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 March 2, 2009 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.



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##### Table of Contents

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, 2009 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
|------- | -----------------

The
Company and the Bank are defendants, from time to time, in legal actions arising from transactions conducted in the ordinary course of business. The Company and Bank believe, after consultations with legal counsel, that the ultimate liability, if
any, arising from such actions will not have a material adverse effect on their consolidated financial statements.



|ITEM 1A. | RISK FACTORS
|-------- | ------------

There have
been no material changes in the Companys risk factors from those disclosed in the Companys Annual Report on Form 10-K for the year ended December 31, 2008.



|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:



|              |  |                                                                                                                                                                                                                                                
|------------- |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|ExhibitNumber |  | 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)   
|              | 
|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                                                                                                                     



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##### Table of Contents

|       |  |                                                                                                                                                   
|------ |  | --------------------------------------------------------------------------------------------------------------------------------------------------
|       | 
|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.
|-- | --------------------------------------------------

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: 11/06/09 |  | /S/    DAVID
ZALMAN                 
|               |  | David Zalman                        
|               |  | Chairman and Chief Executive Officer
|               | 
|Date: 11/06/09 |  | /S/    DAVID
HOLLAWAY               
|               |  | David Hollaway                      
|               |  | Chief Financial Officer             



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