HOUSTON, Jan. 20, 2012 /PRNewswire/ -- Prosperity Bancshares, Inc.® (NYSE: PB), the parent company of Prosperity Bank®, reported net income for the quarter ended December 31, 2011 of $36.406 million or $0.77 per diluted common share, an increase in net income of $3.608 million or 11.0%, compared with $32.798 million or $0.70 per diluted common share for the same period in 2010. Prosperity also reported net income for the year ended December 31, 2011 of $141.749 million or $3.01 per diluted common share, up 11.0% from 2010 net income of $127.708 million and up 10.3% from 2010 diluted earnings per common share of $2.73.

"We are proud of our performance in 2011. We finished the year with record net income of $141.749 million, an 11.0% increase over 2010. For the full year, our loans increased 8.1% or $280.883 million while our deposits also increased 8.1% or $605.334 million," said David Zalman, Prosperity's Chairman and Chief Executive Officer. "Our entire team is honored to have been recognized by Forbes as the 'Best Bank in America' in their 2012 rankings. This recognition is the result of all of our associates hard work and dedication and reflects our industry leading asset quality, our strong earnings, and our continued focus on building shareholder value," concluded Zalman.

Prosperity's management uses certain non-GAAP (generally accepted accounting principles) financial measures to evaluate its performance. Specifically, Prosperity reviews tangible book value per share, return on average tangible common equity and the tangible equity to tangible assets ratio. Prosperity has included in this Earnings Release information relating to these non-GAAP financial measures for the applicable periods presented. Please refer to the "Notes to Selected Financial Data" at the end of this Earnings Release for a reconciliation of these non-GAAP financial measures.

Results of operations for the three months ended December 31, 2011

For the three months ended December 31, 2011, net income was $36.406 million compared with $32.798 million for the same period in 2010. Net income per diluted common share was $0.77 for the three months ended December 31, 2011 compared with $0.70 for the same period in 2010. Returns on average assets, average common equity and average tangible common equity for the three months ended December 31, 2011 were 1.50%, 9.35% and 23.86%, respectively. Prosperity's efficiency ratio (excluding net gains and losses on the sale of assets) was 40.77% for the three months ended December 31, 2011.

Net interest income before provision for credit losses for the quarter ended December 31, 2011 increased 0.7% to $80.087 million compared with $79.509 million during the same period in 2010 and decreased 3.0% or $2.451 million compared with $82.538 million during the three months ended September 30, 2011. The net interest margin on a tax equivalent basis decreased to 3.82% for the three months ended December 31, 2011 compared with 3.99% for the same period in 2010 and decreased 20 basis points from 4.02% for the three months ended September 30, 2011. The 20 basis point linked quarter decrease was impacted by increased amortization expense from the securities portfolio. Amortization expense for the three months ended December 31, 2011 increased $2.086 million on a linked quarter basis to $9.670 million. At December 31, 2011, the Company had $68.194 million in premium remaining on its securities portfolio.

Non-interest income increased $160 thousand or 1.2% to $14.065 million for the three months ended December 31, 2011 compared with $13.905 million for the same period in 2010. The increase was mainly attributable to an increase in debit card and ATM card income, partially offset by a decrease NSF fees.

Non-interest expense decreased $2.842 million or 6.9% to $38.385 million for the three months ended December 31, 2011 compared with $41.227 million during the same period in 2010. The decrease was mainly attributable to a decrease in ORE expenses and reduced FDIC assessments.

Loans at December 31, 2011 were $3.766 billion, an increase of $280.883 million or 8.1%, compared with $3.485 billion at December 31, 2010. Loans increased 0.8% (3.0% annualized) or $28.276 million on a linked quarter basis compared with loans of $3.737 billion at September 30, 2011.

Deposits at December 31, 2011 were $8.060 billion, an increase of $605.334 million or 8.1% compared with $7.455 billion at December 31, 2010. Linked quarter deposits increased $261.515 million or 3.4% (13.4% annualized) from $7.799 billion at September 30, 2011.

Average loans increased 9.6% or $328.225 million to $3.750 billion for the quarter ended December 31, 2011 compared with $3.422 billion for the same period of 2010. Linked quarter average loans increased 1.5% or $55.884 million from $3.694 billion at September 30, 2011. Average deposits increased 6.0% to $7.899 billion for the quarter ended December 31, 2011 compared with $7.453 billion for the same period of 2010. Linked quarter average deposits increased 3.2% or $246.534 million from $7.653 billion at September 30, 2011.

At December 31, 2011, construction loans totaled $482.140 million, consisting of approximately $136 million of single family residential construction loans; $43 million of land development loans; $61 million of raw land loans; $87 million of residential lot loans; $50 million of commercial lot loans; and $105 million of commercial construction and other construction loans. This is a decrease of $8.053 million from construction loans at September 30, 2011.

At December 31, 2011, Prosperity had $9.823 billion in total assets, $3.766 billion in loans and $8.060 billion in deposits. Assets, loans and deposits at December 31, 2011 increased by 3.7%, 8.1% and 8.1%, respectively, compared with their level at December 31, 2010.

Asset Quality

Non-performing assets totaled $12.052 million or 0.14% of quarterly average earning assets at December 31, 2011 compared with $15.842 million or 0.20% of quarterly average earning assets at December 31, 2010 and $13.363 million or 0.16% of quarterly average earnings assets at September 30, 2011. The allowance for credit losses was 1.37% of total loans at December 31, 2011, 1.40% at September 30, 2011 and 1.48% of total loans at December 31, 2010.

The provision for credit losses was $1.150 million for the three months ended December 31, 2011 and $2.900 million for the three months ended December 31, 2010. Net charge offs were $2.069 million for the three months ended December 31, 2011 and $2.670 million for the three months ended December 31, 2010.


    Non-performing
     assets          Dec 31, 2011         Sept 30, 2011 Dec 31, 2010
    (In thousands)

                        Amount                  #          Amount             #        Amount             #
                        ------                 ---         ------            ---       ------            ---
                     (Unaudited)                        (Unaudited)                  (Unaudited)
    Commercial                       $767            17               $1,440      17              $1,317      17
    Construction                    4,649            28                5,042      30               8,469      46
    1-4 family
     (including home
     equity)                        3,689            38                3,894      38               3,933      38
    Commercial real
     estate
     (including
     multi-family)                  2,877             9                2,885      11               2,022       6
    Agriculture                        49             3                   51       3                  11       1
    Consumer                           21             4                   51       4                  90      13
                                      ---           ---                  ---     ---                 ---     ---
    Total                         $12,052            99              $13,363     103             $15,842     121
                                  =======           ===              =======     ===             =======     ===


    Net Charge-
     offs        Three Months Ended       Three Months Ended       Three Months Ended
    (In
     thousands)     Dec 31, 2011             Sept 30, 2011            Dec 31, 2010
                    ------------             -------------            ------------
                    (Unaudited)               (Unaudited)             (Unaudited)
    Commercial                       $676                      $7                      $855
    Construction                      153                    (197)                    1,014
    1-4 family
     (including
     home
     equity)                          843                     134                       314
    Commercial
     real
     estate
     (including
     multi-
     family)                          218                     271                       285
    Agriculture                        --                      --                        --
    Consumer                          179                     153                       202
                                      ---                     ---                       ---
    Total                          $2,069                    $368                    $2,670
                                   ======                    ====                    ======

The provision for credit losses was $5.200 million for the twelve months ended December 31, 2011; a decrease of $8.385 million compared with $13.585 million for the twelve months ended December 31, 2010. Net charge offs were $5.190 million for the twelve months ended December 31, 2011 and $13.864 million for the twelve months ended December 31, 2010.

Results of operations for the twelve months ended December 31, 2011

For the twelve months ended December 31, 2011, net income was $141.749 million compared with $127.708 million for the same period in 2010. Net income per diluted common share was $3.01 for the twelve months ended December 31, 2011 compared with $2.73 for the same period in 2010.

Returns on average assets, average common equity and average tangible common equity for the twelve months ended December 31, 2011 were 1.47%, 9.36% and 25.11%, respectively. Prosperity's efficiency ratio (excluding net gains and losses on the sale of assets) was 42.76% for the twelve months ended December 31, 2011.

Net interest income before provision for credit losses for the twelve months ended December 31, 2011 increased $8.520 million or 2.7%, to $326.668 million compared with $318.148 million during the same period in 2010. The net interest margin on a tax equivalent basis decreased to 3.98% for the twelve months ended December 31, 2011 compared with 4.04% for the same period in 2010.

Non-interest income increased $2.210 million or 4.1% to $56.043 million for the twelve months ended December 31, 2011 compared with $53.833 million for the same period in 2010. The increase was mainly attributable to an increase in debit card and ATM card income and a decrease in loss on sale of ORE, partially offset by a decrease NSF fees.

Non-interest expense decreased $2.849 million or 1.7% to $163.745 million for the twelve months ended December 31, 2011 compared with $166.594 million for the same period in 2010. The decrease was due primarily to decreases in FDIC assessments, CDI amortization, ORE expenses and other non-interest expenses partially offset by an increase in salaries and benefits expense.

Conference Call

Prosperity's management team will host a conference call on Friday, January 20, 2012 at 10:30 a.m. Eastern Standard Time (9:30 a.m. Central Standard Time) to discuss Prosperity's fourth quarter and full year 2011 earnings. Individuals and investment professionals may participate in the call by dialing 800-862-9098, the reference code is PBTX.

Alternatively, individuals may listen to the live webcast of the presentation by visiting Prosperity's website at www.prosperitybanktx.com. The webcast may be accessed directly from Prosperity's Investor Relations page by clicking on the "4(th) Quarter Results and Webcast" link.

Prosperity Transfers Listing to NYSE Under Symbol "PB"

Prosperity transferred the listing of its common stock from the NASDAQ Global Select Market to the New York Stock Exchange (NYSE). The Company began trading, under the new ticker symbol "PB" on the NYSE on December 28, 2011.

Acquisition of The Bank Arlington

On January 19, 2012, Prosperity announced the signing of a definitive agreement to acquire The Bank Arlington. The Bank Arlington operates one (1) banking office in Arlington, Texas, in the Dallas/Fort Worth CMSA. As of December 31, 2011, The Bank Arlington reported total assets of $37.3 million, total loans of $21.3 million and total deposits of $32.8 million.

Under the terms of the definitive agreement, Prosperity will issue up to 138,600 shares of Prosperity common stock for all outstanding shares of The Bank Arlington capital stock, subject to certain conditions and potential adjustments.

Acquisition of East Texas Financial Services, Inc.

On December 9, 2011, Prosperity announced the signing of a definitive agreement to acquire East Texas Financial Services, Inc. (OTC BB: FFBT) and its wholly-owned subsidiary, First Federal Bank Texas ("Firstbank").

East Texas Financial Services operates four (4) banking offices in the Tyler MSA, including three (3) locations in Tyler, Texas and one (1) location in Gilmer, Texas. As of December 31, 2011, First Federal Bank reported total assets of $199.0 million, total loans of $163.1 million and total deposits of $126.7 million.

Under the terms of the definitive agreement, Prosperity will issue up to 531,000 shares of Prosperity common stock for all outstanding shares of East Texas Financial Services capital stock, subject to certain conditions and potential adjustments.

Acquisition of Texas Bankers, Inc.

On January 1, 2012, Prosperity completed the previously announced acquisition of Texas Bankers, Inc. and its wholly-owned subsidiary, Bank of Texas, Austin, Texas. The transaction continues Prosperity's strategic growth and expansion of the franchise in Central Texas.

The three (3) Bank of Texas banking offices in the Austin, Texas CMSA consist of a location in Rollingwood, which upon operational integration will be consolidated with Prosperity's Westlake location and remain in Bank of Texas' Rollingwood banking office; one banking center in downtown Austin, which upon operational integration will be consolidated into Prosperity's downtown Austin location; and another banking center in Thorndale. Prosperity now operates thirty-four (34) banking centers in the Central Texas area including Austin and San Antonio.

Texas Bankers, Inc. reported total assets of $77.0 million, total loans of $27.6 million and total deposits of $70.4 million on December 31, 2011.

Under the terms of the agreement, Prosperity issued 314,953 shares of Prosperity common stock for all outstanding shares of Texas Bankers capital stock which resulted in a premium of $5.2 million.

Prosperity Bancshares, Inc.®

Prosperity Bancshares Inc.®, recently named "America's Best Bank" by Forbes is a $9.8 billion Houston, Texas based regional financial holding company, formed in 1983. Operating under a community banking philosophy and seeking to develop broad customer relationships based on service and convenience, Prosperity offers a variety of traditional loan and deposit products to its customers, which consist primarily of small and medium sized businesses and consumers. In addition to established banking products, Prosperity offers a complete line of services including: Internet Banking services at http://www.prosperitybanktx.com, Retail Brokerage Services, MasterMoney Debit Cards, and 24 hour voice response banking. Prosperity currently operates one hundred seventy five (175) full service banking locations; fifty-nine (59) in the Houston area; twenty (20) in the South Texas area including Corpus Christi and Victoria; thirty-one (31) in the Dallas/Fort Worth area; twenty-one (21) in the East Texas area; thirty-four (34) in the Central Texas area including Austin and San Antonio; and ten (10) in the Bryan/College Station area.


    Bryan/College
     Station Area -      Dallas/Fort Worth Area -                                 Mount Vernon       Cleveland
                          Dallas - Abrams CentreBalch
                          SpringsCamp WisdomCedar HillCentral
                          ExpresswayEast RennerFriscoFrisco-
                          West
                          IndependenceKiestMcKinneyMcKinney-
                          StonebridgeMidwayPreston
                          ForestPreston RoadRed OakSachse The
                          Colony Turtle CreekWestmoreland Fort
                          Worth -Haltom
                          CityKellerRoanokeStockyards  Other
                          Dallas/Fort Worth Locations -
                          AzleEnnisGainesvilleMesquiteMuensterSangerWaxahachie
                           East Texas Area - AthensAthens-
                           SouthBlooming
                          GroveCantonCarthageCorsicanaCrockettEustaceGrapelandGun
                          Barrel
    Bryan                 CityJacksonvilleKerensLongview                          Palestine          East Bernard
    Bryan-East                                                                    Rusk               El Campo
    Bryan-North                                                                   Seven Points       Dayton
    Caldwell                                                                      Teague             Galveston
    College Station                                                               Tyler              Groves
    Greens Prairie                                                                Tyler-University   Hempstead
    Madisonville                                                                  Winnsboro          Hitchcock
    Navasota                                                                                         Katy
    Rock Prairie                                                                  Houston Area -     Liberty
    Wellborn Road                                                                                    Magnolia
                                                                                                     Mont Belvieu
    Central Texas Area -                                                          Houston -          Nederland
                                                                                  Aldine             Needville
    Austin -                                                                      Allen Parkway      Shadow Creek
    183                                                                           Bellaire           Sweeny
    Allandale                                                                     Beltway            Tomball
    Cedar Park                                                                    Clear Lake         Waller
    Congress                                                                      Copperfield        West Columbia
    Lakeway                                                                       Cypress            Wharton
    Liberty Hill                                                                  Downtown           Winnie
    Northland                                                                     Eastex             Wirt
    Oak Hill                                                                      Fairfield
    Parmer Lane                                                                   First Colony
    Research Blvd                                                                 Gessner
    Westlake                                                                      Gladebrook
                                                                                  Harrisburg         South Texas Area -
                                                                                  Heights
    Other Central Texas                                                           Highway 6 West     Corpus Christi -
    Locations -                                                                   Hillcroft          Airline
    Bastrop                                                                       Little York        Carmel
    Cuero                                                                         Medical Center     Northwest
    Dime Box                                                                      Memorial Drive     Saratoga
    Dripping Springs                                                              Northside          Water Street
    Elgin                                                                         Pasadena
    Flatonia                                                                      Pecan Grove
    Georgetown                                                                    Piney Point        Other South Texas
    Gonzales                                                                      River Oaks         Locations -
    Hallettsville                                                                 Royal Oaks         Alice
    Kingsland                                                                     Sugar Land         Aransas Pass
    La Grange                                                                     SW Medical Center  Beeville
    Lexington                                                                     Tanglewood         Edna
    New Braunfels                                                                 Uptown             Goliad
    Pleasanton                                                                    Waugh Drive        Kingsville
    Round Rock                                                                    West University    Mathis
    San Antonio                                                                   Woodcreek          Padre Island
    Schulenburg                                                                                      Palacios
    Seguin                                                                                           Port Lavaca
    Smithville                                                                    Other Houston Area Portland
    Thorndale                                                                     Locations -        Rockport
    Weimar                                                                        Angleton           Sinton
    Yoakum                                                                        Bay City           Victoria
    Yorktown                                                                      Beaumont           Victoria-North
                                                                                  Cinco Ranch

In connection with the proposed merger of East Texas Financial Services, Inc. into Prosperity, Prosperity has filed with the Securities and Exchange Commission a registration statement on Form S-4 to register the shares of Prosperity's common stock to be issued to the stockholders of East Texas Financial Services. The registration statement includes a proxy statement/prospectus which will be sent to the stockholders of East Texas Financial Services seeking their approval of the proposed transaction.

WE URGE INVESTORS AND SECURITY HOLDERS TO READ THE REGISTRATION STATEMENT ON FORM S-4, THE PROXY STATEMENT/PROSPECTUS INCLUDED WITHIN THE REGISTRATION STATEMENT ON FORM S-4 AND ANY OTHER RELEVANT DOCUMENTS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION IN CONNECTION WITH THE PROPOSED TRANSACTION BECAUSE THEY CONTAIN IMPORTANT INFORMATION ABOUT PROSPERITY, EAST TEXAS FINANCIAL SERVICES AND THE PROPOSED TRANSACTION.

In connection with the proposed merger of The Bank Arlington into Prosperity Bank, Prosperity will file with the Securities and Exchange Commission a registration statement on Form S-4 to register the shares of Prosperity's common stock to be issued to the shareholders The Bank Arlington. The registration statement will include a proxy statement/prospectus which will be sent to the shareholders of The Bank Arlington seeking their approval of the proposed transaction.

WE URGE INVESTORS AND SECURITY HOLDERS TO READ THE REGISTRATION STATEMENT ON FORM S-4, THE PROXY STATEMENT/PROSPECTUS INCLUDED WITHIN THE REGISTRATION STATEMENT ON FORM S-4 AND ANY OTHER RELEVANT DOCUMENTS TO BE FILED WITH THE SECURITIES AND EXCHANGE COMMISSION IN CONNECTION WITH THE PROPOSED TRANSACTION BECAUSE THEY CONTAIN IMPORTANT INFORMATION ABOUT PROSPERITY, THE BANK ARLINGTON AND THE PROPOSED TRANSACTION.

Investors and security holders may obtain free copies of these documents through the website maintained by the Securities and Exchange Commission at http://www.sec.gov. Documents filed with the SEC by Prosperity will be available free of charge by directing a request by telephone or mail to Prosperity Bancshares, Inc., Prosperity Bank Plaza, 4295 San Felipe, Houston, Texas 77027 Attn: Investor Relations. Prosperity's telephone number is (281) 269-7199.

"Safe Harbor" Statement under the Private Securities Litigation Reform Act of 1995: This release contains, and the remarks by Prosperity's management on the conference call may contain, forward-looking statements within the meaning of the securities laws that are based on current expectations, assumptions, estimates and projections about Prosperity, and its subsidiaries. These forward-looking statements are not guarantees of future performance and are subject to risks and uncertainties, many of which are outside of Prosperity's control, which may cause actual results to differ materially from those expressed or implied by the forward-looking statements. These risks and uncertainties include but are not limited to whether Prosperity can: successfully identify acquisition targets and integrate the businesses of acquired companies and banks; continue to sustain its current internal growth rate or total growth rate; provide products and services that appeal to its customers; continue to have access to debt and equity capital markets; and achieve its sales objectives. Other risks include, but are not limited to: the possibility that credit quality could deteriorate; actions of competitors; changes in laws and regulations (including changes in governmental interpretations of regulations and changes in accounting standards); a deterioration or downgrade in the credit quality and credit agency ratings of the securities in Prosperity's securities portfolio; customer and consumer demand, including customer and consumer response to marketing; effectiveness of spending, investments or programs; fluctuations in the cost and availability of supply chain resources; economic conditions, including currency rate fluctuations and interest rate fluctuations; weather; and the stock price volatility associated with "small-cap" companies. These and various other factors are discussed in Prosperity's Annual Report on Form 10-K for the year ended December 31, 2010 and other reports and statements Prosperity has filed with the SEC. Copies of the SEC filings for Prosperity Bancshares'® may be downloaded from the Internet at no charge from www.prosperitybanktx.com.


                                                         Prosperity Bancshares, Inc.(R)
                                                              Financial Highlights
                                         (Dollars and share amounts in thousands, except per share data)

                                     Three Months Ended                    Twelve Months Ended
                                        Dec 31, 2011                           Dec 31, 2010              Dec 31, 2011          Dec 31, 2010
                                        ------------                           ------------              ------------          ------------
    Selected Earnings and Per           (Unaudited)                            (Unaudited)                (Unaudited)           (Unaudited)
    Share Data

    Total interest income                                $89,658                                $92,436               $371,908              $384,537
    Total interest expense                                 9,571                                 12,927                 45,240                66,389
                                                           -----                                 ------                 ------                ------
    Net interest income                                   80,087                                 79,509                326,668               318,148
    Provision for credit losses                            1,150                                  2,900                  5,200                13,585
                                                           -----                                  -----                  -----                ------
    Net interest income after
         provision for credit losses                      78,937                                 76,609                321,468               304,563

    Total non-interest income                             14,065                                 13,905                 56,043                53,833
    Total non-interest expense                            38,385                                 41,227                163,745               166,594
                                                          ------                                 ------                -------               -------
    Net income before taxes                               54,617                                 49,287                213,766               191,802
    Federal income taxes                                  18,211                                 16,489                 72,017                64,094
                                                          ------                                 ------                 ------                ------

    Net income                                           $36,406                                $32,798               $141,749              $127,708
                                                         =======                                =======               ========              ========

    Basic earnings per share                               $0.78                                  $0.70                  $3.03                 $2.74

    Diluted earnings per share                             $0.77                                  $0.70                  $3.01                 $2.73

    Period end shares outstanding                         46,910                                 46,684                 46,910                46,684
    Weighted average shares
         outstanding (basic)                              46,893                                 46,671                 46,846                46,621
    Weighted average shares
         outstanding (diluted)                            47,028                                 46,818                 47,017                46,832



                                                         Prosperity Bancshares, Inc.(R)
                                                              Financial Highlights
                                                             (Dollars in thousands)

                                   Three Months Ended                        Twelve Months Ended
                                      Dec 31, 2011                              Dec 31, 2010                Dec 31, 2011             Dec 31, 2010
                                      ------------                              ------------                ------------             ------------
    Balance Sheet Averages            (Unaudited)                                (Unaudited)                (Unaudited)               (Unaudited)

    Total loans                                       $3,749,923                                $3,421,698               $3,648,701               $3,394,502
    Investment securities                              4,596,017                                 4,542,433                4,625,833                4,508,918
    Federal funds sold and
         other earning assets                             62,035                                    14,305                   26,879                   48,944
                                                          ------                                    ------                   ------                   ------
    Total earning assets                               8,407,975                                 7,978,436                8,301,413                7,952,364
    Allowance for credit losses                          (51,713)                                  (51,551)                 (51,871)                 (52,151)
    Cash and due from banks                              136,856                                   133,620                  131,374                  130,554
    Goodwill                                             924,537                                   923,687                  924,506                  907,548
    Core Deposit Intangibles (CDI)                        21,890                                    29,822                   24,767                   32,532
    Other real estate                                      9,803                                    13,121                   10,220                   14,490
    Fixed assets, net                                    160,261                                   160,177                  159,983                  158,667
    Other assets                                         119,870                                   133,839                  128,492                  134,376
                                                         -------                                   -------                  -------                  -------
    Total assets                                      $9,729,479                                $9,321,151               $9,628,884               $9,278,380
                                                      ==========                                ==========               ==========               ==========


    Non-interest bearing deposits                     $1,924,037                                $1,661,448               $1,800,102               $1,567,676
    Interest bearing deposits                          5,975,081                                 5,791,726                5,951,094                5,965,063
                                                       ---------                                 ---------                ---------                ---------
    Total deposits                                     7,899,118                                 7,453,174                7,751,196                7,532,739
    Securities sold under
         repurchase agreements                            60,999                                    77,759                   68,049                   81,623
    Federal funds purchased and
         other borrowings                                 66,834                                   198,677                  152,716                  109,260
    Junior subordinated
         debentures                                       85,055                                    92,265                   86,557                   92,265
    Other liabilities                                     60,628                                    54,429                   56,617                   56,334
    Shareholders' equity(A)                            1,556,845                                 1,444,847                1,513,749                1,406,159
                                                       ---------                                 ---------                ---------                ---------
    Total liabilities and equity                      $9,729,479                                $9,321,151               $9,628,884               $9,278,380
                                                      ==========                                ==========               ==========               ==========

    (A)  Includes $14,515 and $17,516,
     in after-tax unrealized gains on
     available for sale securities for
     the three month periods ending
     December 31, 2011 and December
     31, 2010, respectively,  and
     $14,680 and $17,693 for the
     twelve month periods ending
     December 31, 2011 and December
     31, 2010, respectively.



                                                                                                                                         Prosperity Bancshares, Inc.(R)
                                                                                                                                              Financial Highlights
                                                                                                                                             (Dollars in thousands)

                                                                                                                                       Three Months Ended                         Twelve Months Ended
                                                                                                                                          Dec 31, 2011                                Dec 31, 2010                                 Dec 31, 2011                                 Dec 31, 2010
                                                                                                                                          ------------                                ------------                                 ------------                                 ------------
               Income Statement Data                                                                                                     (Unaudited)                                (Unaudited)                                  (Unaudited)                                   (Unaudited)

               Interest on loans                                                                                                                            $53,899                                    $52,722                                       $214,273                                $209,711
               Interest on securities                                                                                                                        35,719                                     39,708                                        157,580                                 174,707
               Interest on federal funds sold and
                    other earning assets                                                                                                                         40                                          6                                             55                                     119
                                                                                                                                                                ---                                        ---                                            ---                                     ---
               Total interest income                                                                                                                         89,658                                     92,436                                        371,908                                 384,537
                                                                                                                                                             ------                                     ------                                         ------                                 -------
               Interest expense - deposits                                                                                                                    8,682                                     11,749                                         40,975                                  61,509
               Interest expense - debentures                                                                                                                    632                                        803                                          2,984                                   3,250
               Interest expense - other                                                                                                                         257                                        375                                          1,281                                   1,630
                                                                                                                                                                ---                                        ---                                            ---                                   -----
               Total interest expense                                                                                                                         9,571                                     12,927                                         45,240                                  66,389
                                                                                                                                                              -----                                      -----                                         ------                                  ------
               Net interest income(B)                                                                                                                        80,087                                     79,509                                        326,668                                 318,148
               Provision for credit losses                                                                                                                    1,150                                      2,900                                          5,200                                  13,585
                                                                                                                                                              -----                                      -----                                          -----                                   -----
               Net interest income after
                    provision for credit losses                                                                                                              78,937                                     76,609                                        321,468                                 304,563
                                                                                                                                                             ------                                     ------                                         ------                                 -------
               Non-sufficient funds (NSF) fees                                                                                                                5,860                                      6,905                                         24,442                                  27,580
               Debit card and ATM card income                                                                                                                 4,189                                      3,261                                         15,391                                  12,582
               Service charges on deposit accounts                                                                                                            2,515                                      2,614                                          9,981                                  10,088
               Net gain on sale of assets                                                                                                                        --                                          2                                            377                                     402
               Net (loss) gain on sale of ORE                                                                                                                  (473)                                      (915)                                          (904)                                 (4,262)
               Net loss on sale of securities                                                                                                                    --                                         --                                           (581)                                     --
               Other non-interest income                                                                                                                      1,974                                      2,038                                          7,337                                   7,443
                                                                                                                                                              -----                                      -----                                          -----                                   -----
               Total non-interest income                                                                                                                     14,065                                     13,905                                         56,043                                  53,833
                                                                                                                                                             ------                                     ------                                         ------                                  ------

               Salaries and benefits(C)                                                                                                                      21,258                                     21,421                                         92,057                                  86,980
               CDI amortization                                                                                                                               1,879                                      2,172                                          7,780                                   9,016
               Net occupancy and equipment                                                                                                                    3,655                                      3,975                                         14,634                                  15,153
               Depreciation                                                                                                                                   2,051                                      1,999                                          8,150                                   8,313
               Data processing
                and software amortization                                                                                                                     1,417                                      1,515                                          6,823                                   6,222
               Regulatory assessments and FDIC   insurance                                                                                                    1,518                                      2,812                                          8,901                                  11,039
               ORE Expense                                                                                                                                      680                                      1,013                                          1,501                                   3,483
               Other non-interest expense                                                                                                                     5,927                                      6,320                                         23,899                                  26,388
                                                                                                                                                              -----                                      -----                                          -----                                  ------
               Total non-interest expense                                                                                                                    38,385                                     41,227                                        163,745                                 166,594
                                                                                                                                                             ------                                     ------                                         ------                                 -------
               Net income before taxes                                                                                                                       54,617                                     49,287                                        213,766                                 191,802
               Federal income taxes                                                                                                                          18,211                                     16,489                                         72,017                                  64,094
                                                                                                                                                             ------                                     ------                                         ------                                  ------
               Net income available
               to common shareholders                                                                                                                       $36,406                                    $32,798                                       $141,749                                $127,708
                                                                                                                                                            =======                                    =======                                        =======                                ========

    (B) Net interest income on a tax equivalent basis would be $80,937 and $80,238 for the three months ended December 31, 2011 and December 31, 2010, respectively, and $330,282 and $321,049 for the twelve months ended December 31, 2011 and December 31, 2010, respectively.

    (C) Salaries and benefits includes equity compensation expenses of $972 and $825 for the three months ended December 31, 2011 and December 31, 2010, respectively, and $3,576 and $3,037 for the twelve months ended December 31, 2011 and December 31, 2010, respectively.


                                                    Prosperity Bancshares, Inc.(R)
                                                         Financial Highlights
                                   (Dollars and share amounts in thousands, except per share data)

                                        As of and for the                   As of and for the
                                       Three Months Ended                  Twelve Months Ended
                                          Dec 31, 2011                        Dec 31, 2010            Dec 31, 2011         Dec 31, 2010
                                          ------------                        ------------            ------------         ------------
    Common Share and                       (Unaudited)                         (Unaudited)             (Unaudited)         (Unaudited)
         Other Data
    Employees - FTE                                         1,664                               1,708                1,664                1,708

    Book value per share                                   $33.41                              $31.11               $33.41               $31.11
    Tangible book value per share                          $13.25                              $10.70               $13.25               $10.70


    Period end shares outstanding                          46,910                              46,684               46,910               46,684
    Weighted average shares
         outstanding (basic)                               46,893                              46,671               46,846               46,621
    Weighted average shares
         outstanding (diluted)                             47,028                              46,818               47,017               46,832

    Non-accrual loans                                      $3,578                              $4,439               $3,578               $4,439
    Accruing loans 90 or more
         days past due                                         --                                 189                   --                  189
    Restructured loans                                         --                                  --                   --                   --
                                                              ---                                 ---                  ---                  ---
    Total non-performing loans                              3,578                               4,628                3,578                4,628
    Repossessed assets                                        146                                 161                  146                  161
    Other real estate                                       8,328                              11,053                8,328               11,053
                                                            -----                              ------                -----               ------
      Total non-performing assets                         $12,052                             $15,842              $12,052              $15,842

    Allowance for credit losses at
         end of period                                    $51,594                             $51,584              $51,594              $51,584

    Net charge-offs                                        $2,069                              $2,670               $5,190              $13,864

    Basic earnings per share                                $0.78                               $0.70                $3.03                $2.74

    Diluted earnings per share                              $0.77                               $0.70                $3.01                $2.73


                                                   Prosperity Bancshares, Inc.(R)
                                                        Financial Highlights

                                       Three Months Ended                 Twelve Months Ended
                                          Dec 31, 2011                        Dec 31, 2010            Dec 31, 2011         Dec 31, 2010
                                          ------------                        ------------            ------------         ------------
    Performance Ratios                     (Unaudited)                        (Unaudited)              (Unaudited)          (Unaudited)

    Return on average
         assets (annualized)                                 1.50%                              1.41%                1.47%                1.38%
    Return on average common
         equity (annualized)                                 9.35%                              9.08%                9.36%                9.08%
    Return on average tangible
         common equity (annualized)                         23.86%                             26.70%               25.11%               27.40%
    Net interest margin(D)
         (tax equivalent) (annualized)                       3.82%                              3.99%                3.98%                4.04%

    Efficiency ratio(E)                                     40.77%                             44.13%               42.76%               44.83%

    Asset Quality Ratios

    Non-performing assets to
         average earning assets                              0.14%                              0.20%                0.15%                0.20%
    Non-performing assets to loans
         and other real estate                               0.32%                              0.45%                0.32%                0.45%
    Net charge-offs
         to average loans                                    0.06%                              0.08%                0.14%                0.41%
    Allowance for credit losses to
         total loans                                         1.37%                              1.48%                1.37%                1.48%

    Common Stock Market Price

    High                                                   $41.74                             $39.96               $46.87               $43.66

    Low                                                    $31.31                             $30.37               $30.91               $28.27

    Period end market price                                $40.35                             $39.28               $40.35               $39.28

    (D) Net interest margin for all
     periods presented is calculated
     on an actual 365 day basis.

    (E) Prosperity's efficiency
     ratio is calculated by dividing
     total non-interest expense
     (excluding credit loss
     provisions) by net interest
     income plus non-interest
     income (excluding net gains and
     losses on the sale of assets
     and securities).  Additionally,
     taxes are not part of this
     calculation.

                                                                                      Prosperity Bancshares, Inc.(R)
                                                                                           Financial Highlights
                                                                                          (Dollars in thousands)

                                           Dec 31, 2011             Sept 30, 2011                June 30, 2011            Mar 31, 2011
                                           ------------             -------------                -------------            ------------
                                            (Unaudited)              (Unaudited)                  (Unaudited)              (Unaudited)
    Loan Portfolio

    Commercial                                            $439,854              11.7%                           $451,541              12.1%   $455,791  12.4%   $460,066  12.9%
    Construction                                           482,140              12.8%                            490,193              13.1%    483,581  13.2%    494,159  13.8%
    1-4 family residential                               1,007,266              26.8%                            981,388              26.3%    941,250  25.7%    882,807  24.7%
    Home equity                                            146,999               3.8%                            139,553               3.7%    131,213   3.6%    123,696   3.4%
    Commercial real estate                               1,441,226              38.3%                          1,426,704              38.2%  1,411,501  38.5%  1,385,031  38.8%
    Agriculture                                            170,234               4.5%                            168,011               4.5%    160,780   4.4%    144,535   4.1%
    Consumer                                                78,187               2.1%                             80,240               2.1%     81,132   2.2%     82,626   2.3%
                                                            ------                                                ------                        ------            ------
    Total Loans                                         $3,765,906                                            $3,737,630                    $3,665,248        $3,572,920
                                                        ==========                                            ==========                    ==========        ==========

    Deposit Types

    Non-interest bearing DDA                            $1,972,226              24.5%                         $1,861,907              23.9% $1,788,756  23.3% $1,730,427  22.2%
    Interest bearing DDA                                 1,532,701              19.0%                          1,332,914              17.1%  1,358,649  17.7%  1,432,766  18.3%
    Money Market                                         2,042,243              25.3%                          1,995,248              25.6%  1,878,679  24.5%  2,014,674  25.8%
    Savings                                                514,780               6.4%                            498,451               6.4%    471,082   6.1%    454,649   5.8%
    Time < $100                                            968,806              12.0%                          1,005,672              12.9%  1,037,492  13.6%  1,072,343  13.7%
    Time > $100                                          1,029,498              12.8%                          1,104,547              14.1%  1,133,034  14.8%  1,111,525  14.2%
                                                         ---------                                             ---------                     ---------         ---------
    Total Deposits                                      $8,060,254                                            $7,798,739                    $7,667,692        $7,816,384
                                                        ==========                                            ==========                    ==========        ==========


    Loan to Deposit Ratio                                     46.7%                                                 47.9%                         47.8%             45.7%

    Construction Loans

    Single family residential construction                $136,030              28.2%                           $126,926              25.9%   $124,995  25.8%   $112,175  22.7%
    Land development                                        43,084               8.9%                             44,400               9.1%     46,405   9.6%     50,600  10.2%
    Raw land                                                61,177              12.7%                             64,178              13.1%     69,769  14.4%     70,074  14.2%
    Residential lots                                        86,848              18.0%                             88,600              18.1%     86,515  17.9%     86,359  17.5%
    Commercial lots                                         49,645              10.3%                             54,016              11.0%     54,419  11.3%     50,543  10.2%
    Commercial Construction and other                      105,356              21.9%                            112,073              22.8%    101,478  21.0%    124,408  25.2%
                                                           -------                                               -------                       -------           -------
    Total Construction Loans                              $482,140                                              $490,193                      $483,581          $494,159
                                                          ========                                              ========                      ========          ========

                                                                                                                           Prosperity Bancshares, Inc.(R)
                                                                                                                                Financial Highlights
                                                                                                                               (Dollars in thousands)

                                                                                           Dec 31, 2011                           Sept 30, 2011                         June 30, 2011                         Mar 31, 2011                           Dec 31, 2010
                                                                                           ------------                           -------------                         -------------                         ------------                           ------------
    Balance Sheet Data                                                                      (Unaudited)                            (Unaudited)                           (Unaudited)                           (Unaudited)                            (Unaudited)
     (at period end)

    Total loans                                                                                           $3,765,906                            $3,737,630                            $3,665,248                            $3,572,920                            $3,485,023
    Investment securities(F)                                                                               4,658,936                             4,430,530                             4,641,664                             4,798,642                             4,617,116
    Federal funds sold                                                                                           642                                   294                                   350                                   517                                   393
    Allowance for credit losses                                                                              (51,594)                              (52,513)                              (51,932)                              (51,760)                              (51,584)
    Cash and due from banks                                                                                  212,800                               211,261                               145,910                               145,521                               158,975
    Goodwill                                                                                                 924,537                               924,537                               924,537                               924,537                               924,258
    Core deposit intangibles                                                                                  20,996                                22,874                                24,799                                26,742                                28,776
    Other real estate                                                                                          8,328                                 8,216                                 8,841                                10,465                                11,053
    Fixed assets, net                                                                                        159,656                               160,099                               160,119                               159,050                               159,053
    Other assets                                                                                             122,464                               124,159                               137,611                               136,313                               143,509
                                                                                                             -------                               -------                               -------                               -------                               -------
    Total assets                                                                                          $9,822,671                            $9,567,087                            $9,657,147                            $9,722,947                            $9,476,572
                                                                                                          ==========                            ==========                            ==========                            ==========                            ==========

    Demand deposits                                                                                       $1,972,226                            $1,861,907                            $1,788,756                            $1,730,427                            $1,673,190
    Interest bearing deposits                                                                              6,088,028                             5,936,832                             5,878,936                             6,085,957                             5,781,730
                                                                                                           ---------                             ---------                             ---------                             ---------                             ---------
    Total deposits                                                                                         8,060,254                             7,798,739                             7,667,692                             7,816,384                             7,454,920
    Securities sold under
         repurchase agreements                                                                                54,883                                66,166                                91,288                                51,847                                60,659
    Federal funds purchased and
         other borrowings                                                                                     12,790                                13,583                               248,839                               228,092                               374,433
    Junior subordinated debentures                                                                            85,055                                85,055                                85,055                                85,055                                92,265
    Other liabilities                                                                                         42,424                                62,205                                52,625                                61,071                                41,956
                                                                                                              ------                                ------                                ------                                ------                                ------
    Total liabilities                                                                                      8,255,406                             8,025,748                             8,145,499                             8,242,449                             8,024,233
    Shareholders' equity(G)                                                                                1,567,265                             1,541,339                             1,511,648                             1,480,498                             1,452,339
                                                                                                           ---------                             ---------                             ---------                             ---------                             ---------
    Total liabilities and equity                                                                          $9,822,671                            $9,567,087                            $9,657,147                            $9,722,947                            $9,476,572
                                                                                                          ==========                            ==========                            ==========                            ==========                            ==========


    (F) Includes $20,726, $24,278, $23,647, $21,088 and $22,007 in unrealized gains on available for sale securities for the quarterly periods ending  December 31, 2011, September 30, 2011, June 30, 2011, March 31, 2011 and December 31, 2010,
     respectively.
    (G) Includes $13,472, $15,781, $15,371, $13,707 and $14,304 in after-tax unrealized gains on available for sale securities for the quarterly periods ending December 31, 2011, September 30, 2011, June 30, 2011, March 31, 2011 and December 31,
     2010, respectively.

                                                                               Prosperity Bancshares, Inc.(R)
                                                                                    Financial Highlights
                                                                                   (Dollars in thousands)

                                                   Three Months Ended
                                                      Dec 31, 2011                      Sept 30, 2011               June 30, 2011          Mar 31, 2011          Dec 31, 2010
                                                      ------------                      -------------               -------------          ------------          ------------
    Income Statement Data              (Unaudited)                                       (Unaudited)                 (Unaudited)            (Unaudited)          (Unaudited)

    Interest on loans                                                 $53,899                               $54,471               $53,703               $52,200               $52,722
    Interest on securities                                             35,719                                38,714                41,943                41,204                39,708
    Interest on federal funds
      sold and other earning assets                                        40                                     4                     6                     5                     6
                                                                          ---                                   ---                   ---                   ---                   ---
        Total interest income                                          89,658                                93,189                95,652                93,409                92,436
                                                                       ------                                ------                ------                ------                ------
    Interest expense- deposits                                          8,682                                 9,717                11,064                11,512                11,749
    Interest expense- debentures                                          632                                   607                   598                 1,147                   803
    Interest expense- other                                               257                                   327                   360                   337                   375
                                                                          ---                                   ---                   ---                   ---                   ---
        Total interest expense                                          9,571                                10,651                12,022                12,996                12,927
                                                                        -----                                ------                ------                ------                ------
        Net interest income                                            80,087                                82,538                83,630                80,413                79,509
    Provision for credit losses                                         1,150                                   950                 1,400                 1,700                 2,900
                                                                        -----                                   ---                 -----                 -----                 -----
        Net interest income after
          provision for credit losses                                  78,937                                81,588                82,230                78,713                76,609
                                                                       ------                                ------                ------                ------                ------
    Non-sufficient funds (NSF) fees                                     5,860                                 6,249                 6,226                 6,107                 6,905
    Debit card and ATM card income                                      4,189                                 3,941                 3,809                 3,452                 3,261
    Service charges on
            deposits accounts                                           2,515                                 2,472                 2,511                 2,483                 2,614
    Net gain on sale of assets                                             --                                    17                   195                   165                     2
    Net loss on sale of ORE                                              (473)                                   95                  (366)                 (160)                 (915)
    Net loss on the sale of securities                                     --                                    --                  (581)                   --                    --
    Other non-interest income                                           1,974                                 1,807                 1,736                 1,820                 2,038
                                                                        -----                                 -----                 -----                 -----                 -----
        Total non-interest income                                      14,065                                14,581                13,530                13,867                13,905
    Salaries and benefits                                              21,258                                23,601                23,994                23,204                21,421
    CDI amortization                                                    1,879                                 1,924                 1,943                 2,034                 2,172
    Net occupancy and equipment                                         3,655                                 3,784                 3,547                 3,648                 3,975
    Depreciation                                                        2,051                                 2,041                 2,037                 2,021                 1,999
    Data processing
         and software amortization                                      1,417                                 1,954                 1,780                 1,672                 1,515
    Regulatory assessments and                                          1,518                                 1,488                 2,894                 3,001                 2,812
         FDIC insurance
    ORE expense                                                           680                                   235                   294                   292                 1,013
    Other non-interest expense                                          5,927                                 6,124                 6,025                 5,823                 6,320
                                                                        -----                                 -----                 -----                 -----                 -----
        Total non-interest expense                                     38,385                                41,151                42,514                41,695                41,227
                                                                       ------                                ------                ------                ------                ------
        Net income before taxes                                        54,617                                55,018                53,246                50,885                49,287
                                                                                                                                   ------
    Federal income taxes                                               18,211                                18,645                18,154                17,007                16,489
                                                                       ------                                ------                ------                ------                ------
        Net income available
           to common shareholders                                     $36,406                               $36,373               $35,092               $33,878               $32,798
                                                                      =======                               =======               =======               =======               =======


                                                                  Prosperity Bancshares, Inc.(R)
                                                                       Financial Highlights

                                       Three Months Ended
                                          Dec 31, 2011                      Sept. 30, 2011             June 30, 2011         Mar 31, 2011         Dec 31, 2010
                                          ------------                      --------------             -------------         ------------         ------------
    Comparative Quarterly                  (Unaudited)                        (Unaudited)               (Unaudited)           (Unaudited)          (Unaudited)
    Asset Quality, Performance
         & Capital Ratios

    Return on average
         assets (annualized)                                1.50%                                1.52%                 1.45%                1.42%                1.41%
    Return on average common
         equity (annualized)                                9.35%                                9.51%                 9.36%                9.22%                9.08%
    Return on average tangible
         equity (annualized)                               23.86%                               25.03%                25.56%               26.22%               26.70%
    Net interest margin
         (tax equivalent) (annualized)                      3.82%                                4.02%                 4.06%                4.02%                3.99%

    Employees - FTE                                        1,664                                1,678                 1,675                1,672                1,708

    Efficiency ratio                                       40.77%                               42.38%                43.58%               44.30%               44.13%
    Non-performing assets to
         average earning assets                             0.14%                                0.16%                 0.15%                0.16%                0.20%
    Non-performing assets to loans
         and other real estate                              0.32%                                0.36%                 0.35%                0.36%                0.45%
    Net charge-offs to
         average loans                                      0.06%                                0.01%                 0.03%                0.04%                0.08%
    Allowance for credit losses to
         total loans                                        1.37%                                1.40%                 1.42%                1.45%                1.48%

    Book value per share                                  $33.41                               $32.87                $32.24               $31.65               $31.11

    Tangible book value per share                         $13.25                               $12.67                $11.99               $11.31               $10.70

    Tier 1 risk-based capital                              15.90%                               15.47%                14.72%               14.00%               13.64%

    Total risk-based capital                               17.09%                               16.69%                15.93%               15.21%               14.87%

    Tier 1 leverage capital                                 7.89%                                7.70%                 7.24%                6.97%                6.87%

    Tangible equity to tangible assets                      7.00%                                6.89%                 6.46%                6.03%                5.86%

    Equity to assets                                       15.96%                               16.11%                15.65%               15.23%               15.33%

                                                                                                        Prosperity Bancshares, Inc.(R)
                                                                                                   Supplemental Financial Data (Unaudited)
                                                                                                            (Dollars in thousands)

                                                    Three Months Ended December 31,   Three Months Ended December 31,
                                                                  2011                              2010
    YIELD ANALYSIS                                             Average                        Interest Earned                    Average                         Average                 Interest Earned             Average
                                                               Balance                        / Interest Paid                   Yield/Rate                       Balance                 / Interest Paid           Yield/Rate
                                                               -------                        ---------------                   ----------                       -------                 ---------------           ----------

    Interest Earning Assets:
    Loans                                                                $3,749,923                           $53,899                         5.70%                        $3,421,698                 $52,722                 6.11%
    Investment securities                                                 4,596,017                            35,719                         3.11%                         4,542,433                  39,708                 3.50%
    Federal funds sold and other
       earning assets                                                        62,035                                40                         0.26%                            14,305                       6                 0.17%
                                                                             ------                               ---                                                          ------                     ---
      Total interest earning assets                                       8,407,975                           $89,658                         4.23%                         7,978,436                 $92,436                 4.60%
                                                                          ---------                                                                                         ---------
    Allowance for credit losses                                             (51,713)                                                                                          (51,551)
    Non-interest earning assets                                           1,373,217                                                                                         1,394,266
                                                                          ---------                                                                                         ---------
      Total assets                                                       $9,729,479                                                                                        $9,321,151
                                                                         ==========                                                                                        ==========

    Interest Bearing Liabilities:
    Interest bearing demand
     deposits                                                            $1,363,900                            $1,450                         0.42%                        $1,291,312                  $1,772                 0.54%
    Savings and money market
     deposits                                                             2,553,227                             2,450                         0.38%                         2,229,295                   3,189                 0.57%
    Certificates and other time
     deposits                                                             2,057,954                             4,782                         0.92%                         2,271,119                   6,788                 1.19%
    Securities sold under
     repurchase agreements                                                   60,999                                63                         0.41%                            77,759                     110                 0.56%
    Federal funds purchased and
     other borrowings                                                        66,834                               194                         1.15%                           198,677                     265                 0.53%
    Junior subordinated debentures                                           85,055                               632                         2.95%                            92,265                     803                 3.45%
                                                                             ------                               ---                                                          ------                     ---
      Total interest bearing
       liabilities                                                       $6,187,969                            $9,571      0.61%(H)                                        $6,160,427                 $12,927 0.83%(H)
                                                                                                               ------                                                                                 -------
    Non-interest bearing liabilities:
    Non-interest bearing demand
     deposits                                                            $1,924,037                                                                                        $1,661,448
    Other liabilities                                                        60,628                                                                                            54,429
                                                                             ------                                                                                            ------
      Total liabilities                                                  $8,172,634                                                                                        $7,876,304
                                                                         ----------                                                                                        ----------
    Shareholders' equity                                                 $1,556,845                                                                                        $1,444,847
                                                                         ----------                                                                                        ----------
      Total liabilities and
       shareholders' equity                                              $9,729,479                                                                                        $9,321,151
                                                                         ==========                                                                                        ==========

    Net Interest Income & Margin                                                                              $80,087                         3.78%                                                   $79,509                 3.95%
                                                                                                              =======                                                                                 =======

    Net Interest Income & Margin
         (tax equivalent)                                                                                     $80,937                         3.82%                                                   $80,238                 3.99%
                                                                                                              =======                                                                                 =======

    (H) The Company's total cost of funds, including non-interest bearing deposits was 0.47% and 0.66% for the three months ended December 31, 2011 and December 31, 2010, respectively.


                                                                                                           Prosperity Bancshares, Inc.(R)
                                                                                                      Supplemental Financial Data (Unaudited)
                                                                                                               (Dollars in thousands)

                                                    Twelve Months Ended December 31,   Twelve Months Ended December 31,
                                                                   2011                              2010
    YIELD ANALYSIS                                              Average                        Interest Earned                      Average                         Average               Interest Earned               Average
                                                                Balance                        / Interest Paid                    Yield/Rate                        Balance               / Interest Paid             Yield/Rate
                                                                -------                        ---------------                    ----------                        -------               ---------------             ----------

    Interest Earning Assets:
    Loans                                                                 $3,648,701                           $214,273                          5.87%                        $3,394,502               $209,711                  6.18%
    Investment securities                                                  4,625,833                            157,580                          3.41%                         4,508,918                174,707                  3.87%
    Federal funds sold and other
         earning assets                                                       26,879                                 55                          0.20%                            48,944                    119                  0.24%
                                                                              ------                                ---                                                           ------                    ---
      Total interest earning assets                                        8,301,413                           $371,908                          4.48%                         7,952,364               $384,537                  4.84%
                                                                           ---------                                                                                           ---------
    Allowance for credit losses                                              (51,871)                                                                                            (52,151)
    Non-interest earning assets                                            1,379,342                                                                                           1,378,167
                                                                           ---------                                                                                           ---------
      Total assets                                                        $9,628,884                                                                                          $9,278,380
                                                                          ==========                                                                                          ==========

    Interest Bearing Liabilities:
    Interest bearing demand
     deposits                                                             $1,393,501                             $7,416                          0.53%                        $1,336,400                 $8,994                  0.67%
    Savings and money market
     deposits                                                              2,421,735                             11,836                          0.49%                         2,189,695                 15,159                  0.69%
    Certificates and other time
     deposits                                                              2,135,858                             21,723                          1.02%                         2,438,968                 37,356                  1.53%
    Securities sold under
     repurchase agreements                                                    68,049                                369                          0.54%                            81,623                    595                  0.73%
    Federal funds purchased and other borrowings
                                                                             152,716                                912                          0.60%                           109,260                  1,035                  0.95%
    Junior subordinated debentures                                            86,557                              2,984                          3.45%                            92,265                  3,250                  3.52%
                                                                              ------                              -----                                                           ------                  -----
      Total interest bearing
       liabilities                                                         6,258,416                            $45,240     0.72%(I)                                           6,248,211                $66,389 1.06%(I)
                                                                           ---------                                                                                           ---------
    Non-interest bearing liabilities:
    Non-interest bearing demand
     deposits                                                              1,800,102                                                                                           1,567,676
    Other liabilities                                                         56,617                                                                                              56,334
                                                                              ------                                                                                              ------
      Total liabilities                                                    8,115,135                                                                                           7,872,221
    Shareholders' equity                                                   1,513,749                                                                                           1,406,159
                                                                           ---------                                                                                           ---------
      Total liabilities and
       shareholders' equity                                               $9,628,884                                                                                          $9,278,380
                                                                          ==========                                                                                          ==========

    Net Interest Income & Margin                                                                               $326,668                          3.94%                                                 $318,148                  4.00%
                                                                                                               ========                                                                                ========

    Net Interest Income & Margin
         (tax equivalent)                                                                                      $330,282                          3.98%                                                 $321,049                  4.04%
                                                                                                               ========                                                                                ========

    (I) The Company's total cost of funds, including non-interest bearing deposits was 0.56% and 0.85% for the years ended December 31, 2011 and December 31, 2010, respectively.

Prosperity Bancshares, Inc.®
Notes to Selected Financial Data
(Dollars and share amounts in thousands, except per share data)

Consolidated Financial Highlights

NOTES TO SELECTED FINANCIAL DATA

Prosperity's management uses certain non-GAAP (generally accepted accounting principles) financial measures to evaluate its performance. Specifically, Prosperity reviews tangible book value per share, return on average tangible common equity and the tangible equity to tangible assets ratio for internal planning and forecasting purposes. Prosperity has included in this Earnings Release information relating to these non-GAAP financial measures for the applicable periods presented. Prosperity believes these non-GAAP financial measures provide information useful to investors in understanding Prosperity's financial results and Prosperity believes that its presentation, together with the accompanying reconciliations, provides a complete understanding of factors and trends affecting Prosperity's business and allows investors to view performance in a manner similar to management, the entire financial services sector, bank stock analysts and bank regulators. Further, Prosperity believes that these non-GAAP measures provide useful information by excluding certain items that may not be indicative of its core operating earnings and business outlook. These non-GAAP measures should not be considered a substitute for GAAP basis measures and results and Prosperity strongly encourages investors to review its consolidated financial statements in their entirety and not to rely on any single financial measure. Because non-GAAP financial measures are not standardized, it may not be possible to compare these financial measures with other companies' non-GAAP financial measures having the same or similar names.

                                                                                  Three months ended
                                                                                  ------------------
                                        Return on average tangible common equity:   Dec 31,              Sept 30,             June 30,                 Mar 31,                 Dec 31,
                                                                                                    2011                 2011                  2011                    2011                   2010
                                                                                                    ----                 ----                  ----                    ----                   ----
                                                                                  (unaudited)          (unaudited)           (unaudited)             (unaudited)             (unaudited)
                                                                                   ----------           ----------           ----------               ----------             ----------
    Net income                                                                                   $36,406              $36,373               $35,092                 $33,878                $32,798
                                                                                                 -------              -------               -------                 -------                -------
    Average shareholders' equity                                                               1,556,845            1,529,718             1,499,385               1,469,048              1,444,847
    Less: Average goodwill and other intangible assets                                          (946,427)            (948,351)             (950,265)               (952,123)              (953,509)
                                                                                                --------             --------              --------                --------               --------
           Average tangible shareholders' equity                                                $610,418             $581,367              $549,120                $516,925               $491,338
    Return on average tangible common  equity:                                                     23.86%               25.03%                25.56%                  26.22%                 26.70%

    Tangible book value per share:
    Shareholders' equity                                                                      $1,567,265           $1,541,339            $1,511,648              $1,480,498             $1,452,339
    Less: Goodwill and other intangible assets                                                  (945,533)            (947,411)             (949,336)               (951,279)              (953,034)
                                                                                                --------             --------              --------                --------               --------
             Tangible shareholders' equity                                                      $621,732             $593,928              $562,312                $529,219               $499,305

    Period end shares outstanding                                                                 46,910               46,893                46,888                  46,782                 46,684
    Tangible book value per share:                                                                $13.25               $12.67                $11.99                  $11.31                 $10.70

    Tangible equity to tangible assets ratio:
    Tangible shareholders' equity                                                               $621,732             $593,928              $562,312                $529,219               $499,305

    Total assets                                                                              $9,822,671           $9,567,087            $9,657,147              $9,722,947             $9,476,572
    Less: Goodwill and other intangible assets                                                  (945,533)            (947,411)             (949,336)               (951,279)              (953,034)
                                                                                                --------             --------              --------                --------               --------
           Tangible assets                                                                    $8,877,138           $8,619,676            $8,707,811              $8,771,668             $8,523,538

    Tangible equity to tangible assets ratio:                                                       7.00%                6.89%                 6.46%                   6.03%                  5.86%

                                                                        Prosperity Bancshares, Inc.(R)
                                                                 Notes to Selected Financial Data (Unaudited)
                                                       (Dollars and share amounts in thousands, except per share data)

                                                                                                             Twelve Months Ended
                                                                                                                 Dec 31, 2011                Dec 31, 2010
    Return on average tangible common equity:                                                                    (unaudited)                  (unaudited)
    Net income                                                                                                                     $141,749                 $127,708
                                                                                                                                   --------                 --------
    Average shareholders' equity                                                                                                  1,513,749                1,406,159
    Less: Average goodwill and other intangible assets                                                                             (949,273)                (940,080)
                                                                                                                                   --------                 --------
             Average tangible shareholders' equity                                                                                 $564,476                 $466,079
    Return on average tangible common equity:                                                                                         25.11%                   27.40%

    Tangible book value per share:
    Shareholders equity                                                                                                          $1,567,265               $1,452,339
    Less: Goodwill and other intangible assets                                                                                     (945,533)                (953,034)
                                                                                                                                   --------                 --------
             Tangible shareholders' equity                                                                                         $621,732                 $499,305

    Period end shares outstanding                                                                                                    46,910                   46,684
    Tangible book value per share:                                                                                                   $13.25                   $10.70

    Tangible equity to tangible assets ratio:
    Tangible shareholders' equity                                                                                                  $621,732                 $499,305

    Total assets                                                                                                                 $9,822,671               $9,476,572
    Less: Goodwill and other intangible assets                                                                                     (945,533)                (953,034)
                                                                                                                                   --------                 --------
           Tangible assets                                                                                                       $8,877,138               $8,523,538

    Tangible equity to tangible assets ratio:                                                                                          7.00%                    5.86%

SOURCE Prosperity Bancshares, Inc.