content: <PAGE>
  
  ===============================================================================
  <TABLE>
  <CAPTION>
                                                                                |------------------------------|
                                                                                |        OMB APPROVAL          |
                                                                                |------------------------------|
                                                                                | OMB Number:        3235-0101 |
                                                                                | Expires:     August 31, 2003 |
                                  UNITED STATES                                 | Estimated average burden     |
                        SECURITIES AND EXCHANGE COMMISSION                      | hours per response...... 2.0 |
                              WASHINGTON, D.C. 20549                            |------------------------------|
                                                                                       +-----------------------+
                                                                                       |     SEC USE ONLY      |
                                    FORM 144                                           +-----------------------+
                                                                                       | DOCUMENT SEQUENCE NO. |
                                                                                       |                       |
                     NOTICE OF PROPOSED SALE OF SECURITIES                             +-----------------------+
              PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933                    | CUSIP NUMBER          |
                                                                                       |                       |
              ATTENTION: Transmit for filing 3 copies of this form                     +-----------------------+
                         concurrently with either placing an order                     | WORK LOCATION         |
                         with a broker to execute sale or executing                    |                       |
                         a sale directly with a market maker.                          +-----------------------+
  ------------------------------------------------------------------------------------------------------------------------------------
  <S>                                                                          <C>                              <C>
  1 (a) NAME OF ISSUER  (Please type or print)                                 (b) IRS IDENT. NO.               (c) S.E.C. FILE NO.
  
          Prosperity Bancshares, Inc.                                               74-2331986                       000-25051
  ------------------------------------------------------------------------------------------------------------------------------------
  1 (d) ADDRESS OF ISSUER             STREET           CITY           STATE          ZIP CODE                   (e) TELEPHONE NO.
                                                                                                                ---------------------
                                 4925 San Felipe     Houston          Texas           77027                      AREA CODE |  NUMBER
  
                                                                                                                    713      693-9300
  ------------------------------------------------------------------------------------------------------------------------------------
  2 (a) NAME OF PERSON FOR WHOSE ACCOUNT THE SECURITIES ARE TO BE SOLD         (b) IRS INDENT. NO.              (c) RELATIONSHIP
                                                                                                                    TO ISSUER
                                                                                   76-0663128
        HF Properties, Ltd.                                                                                         Affiliate
  ------------------------------------------------------------------------------------------------------------------------------------
  2 (d) ADDRESS                       STREET           CITY           STATE          ZIP CODE
  
        55 Waugh Drive, Suite 1111                    Houston         Texas            77007
  ------------------------------------------------------------------------------------------------------------------------------------
  </TABLE>
  INSTRUCTION: The person filing this notice should contact the issuer to obtain
  the I.R.S. Identification Number and the S.E.C. File Number.
  <TABLE>
  <CAPTION>
  ------------------------------------------------------------------------------------------------------------------------------------
   3(a)            (b)                                SEC USE ONLY  (c)          (d)          (e)          (f)           (g)
    Title of the   Name and Address of Each Broker   --------------  Number of   Aggregate     Number of   Approximate   Name of Each
      Class of     Through Whom the Securities are    Broker-Dealer   Shares       Market       Shares     Date of Sale   Securities
     Securities   to be Offered or Each Market Maker   File Number   or Other      Value       or Other    (See instr.    Exchange
     To be Sold    who is Acquiring the Securities                    Units      (See instr.     Units        3(f))       (See instr.
                                                                    To be Sold      3(d))     Outstanding  (MO. DAY YR.)     3(g))
                                                                    (See instr.               (See instr.
                                                                       3(c))                     3(e))
  ------------------------------------------------------------------------------------------------------------------------------------
  <S>             <C>                                 <C>           <C>          <C>          <C>          <C>           <C>
  ------------------------------------------------------------------------------------------------------------------------------------
  Common Stock    Keefe Bruyette & Woods, Inc.
                  787 7th Avenue, 4th Floor                            80,000   $1,421,600(1)   18,943,483    03/19/03      Nasdaq
                  New York, New York 10019
  ------------------------------------------------------------------------------------------------------------------------------------
  
  ------------------------------------------------------------------------------------------------------------------------------------
  </TABLE>
  INSTRUCTIONS:
  1.(a) Name of Issuer
    (b) Issuer's I.R.S. Identification Number
    (c) Issuer's S.E.C. file number, if any
    (d) Issuer's address, including zip code
    (e) Issuer's telephone number, including area code
  2.(a) Name of person for whose account the securities are to be sold
    (b) Such person's I.R.S. identification number, if such person is an entity
    (c) Such person's relationship to the issuer (e.g., officer, director,
        10% stockholder, or member of immediate family of any of the foregoing)
    (d) Such person's address, including zip code
  3.(a) Title of the class of securities being sold
    (b) Name and address of each broker through whom the securities are intended
        to be sold
    (c) Number of shares or other units to be sold (if debt securities, give the
        aggregate face amount)
    (d) Aggregate market value of the securities to be sold as of a specified
        date within 10 days prior to the filing of this notice
    (e) Number of shares or other units of the class outstanding, or if debt
        securities the face amount thereof outstanding, as shown
        by the most recent report or statement published by the issuer
    (f) Approximate date on which the securities are sold
    (g) Name of each securities exchange, if any, on which the securities are
        intended to be sold
  
  ------------
  (1)  Based on the closing price of the Common Stock of Prosperity Bancshares on
       March 17, 2003 of $17.77 per share.
  
  <PAGE>
  
                         TABLE I--SECURITIES TO BE SOLD
     Furnish the following information with respect to the acquisition of the
       securities to be sold and with respect to the payment of all or any
            part of the purchase price or other consideration therefor:
  <TABLE>
  <CAPTION>
  ------------------------------------------------------------------------------------------------------------------------------------
    Title of    Date You                                        Name of Person from Whom Acquired      Amount of   Date of    Nature
    the Class   Acquired  Nature of Acquisition Transaction  (If gift, also give date donor acquired)  Securities  Payment  of Payment
                                                                                                        Acquired
  ------------------------------------------------------------------------------------------------------------------------------------
  <S>           <C>       <C>                                <C>                                       <C>         <C>     <C>
  ------------------------------------------------------------------------------------------------------------------------------------
  Common Stock   02/23/01  Pursuant to the merger of Commercial   Prosperity Bancshares, Inc.         807,550(2)  02/23/01 Exchange of
                           Bancshares, Inc. and Prosperity                                                                 shares of
                           Bancshares, Inc.                                                                                Commercial
                                                                                                                           Bancshares,
                                                                                                                           Inc. common
                                                                                                                           stock
  ------------------------------------------------------------------------------------------------------------------------------------
  </TABLE>
  INSTRUCTIONS:
  1. If the securities were purchased and full payment therefor was not made in
     cash at the time of purchase, explain in the table or in a note thereto the
     nature of the consideration given. If the consideration consisted of any note
     or other obligation, or if payment was made in installments describe the
     arrangement and state when the note or other obligation was discharged in
     full or the last installment paid.
  2. If within two years after the acquisition of the securities the person for
     whose account they are to be sold had any short positions, put or other
     option to dispose of securities referred to in paragraph (d)(3) of Rule 144,
     furnish full information with respect thereto.
  ===============================================================================
                TABLE II--SECURITIES SOLD DURING THE PAST 3 MONTHS
    Furnish the following information as to all securities of the issuer sold
      during the past 3 months by the person for whose account the securities
                                  are to be sold.
  <TABLE>
  ------------------------------------------------------------------------------------------------------------------------------------
                                                                                                      Amount of
               Name and Address of Seller             Title of Securities Sold       Date of Sale     Securities     Gross Proceeds
                                                                                                         Sold
  ------------------------------------------------------------------------------------------------------------------------------------
  <S>                                                 <C>                            <C>              <C>            <C>
  ------------------------------------------------------------------------------------------------------------------------------------
  Ned S. Holmes Profit Sharing Plan                       Common Stock                12/19/02            7,500         $138,750
  55 Waugh Drive, Suite 1111
  Houston, Texas 77007
  ------------------------------------------------------------------------------------------------------------------------------------
  </TABLE>
  REMARKS:
  
  (2)  Has been adjusted to give effect to the 2 for 1 stock split effective
       May 31, 2002.
  
  INSTRUCTIONS:
  See the definition of "person" in paragraph (a) of Rule 144. Information is to
  be given not only as to the person for whose account the securities are to be
  sold but also as to all other persons included in that definition. In addition,
  information shall be given as to sales by all persons whose sales are required
  by paragraph (e) of Rule 144 to be aggregated with sales for the account of the
  person filing this notice.
  ATTENTION:
  The Person for whose account the securities to which this notice relates are to
  be sold hereby represents by signing this notice that he does not know any
  material adverse information in regard to the current and prospective operations
  of the Issuer of the securities to be sold which has not been publicly
  disclosed.
  
  
                     03/18/03
  ----------------------------------------------
                 DATE OF NOTICE
  
               /s/ Ned S. Holmes
  ----------------------------------------------
      Ned S. Holmes, Managing General Partner
  
    The notice shall be signed by the person for whose account the securities
        are to be sold. At least one copy of the notice shall be manually
             signed. Any copies not manually signed shall bear typed
                              or printed signatures.
  -------------------------------------------------------------------------------
       ATTENTION: Intentional misstatements or omission of facts constitute
                 Federal Criminal Violations (See 18 U.S.C. 1001).
  -------------------------------------------------------------------------------
metadata_documents: [{"type": "144", "sequence": "1", "filename": "d144.txt", "description": "FORM 144 HF PROPERTIES", "secsgml_size_bytes": 14209}]
text: ===============================================================================
  |------------------------------|
                                                                                |        OMB APPROVAL          |
                                                                                |------------------------------|
                                                                                | OMB Number:        3235-0101 |
                                                                                | Expires:     August 31, 2003 |
                                  UNITED STATES                                 | Estimated average burden     |
                        SECURITIES AND EXCHANGE COMMISSION                      | hours per response...... 2.0 |
                              WASHINGTON, D.C. 20549                            |------------------------------|
                                                                                       +-----------------------+
                                                                                       |     SEC USE ONLY      |
                                    FORM 144                                           +-----------------------+
                                                                                       | DOCUMENT SEQUENCE NO. |
                                                                                       |                       |
                     NOTICE OF PROPOSED SALE OF SECURITIES                             +-----------------------+
              PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933                    | CUSIP NUMBER          |
                                                                                       |                       |
              ATTENTION: Transmit for filing 3 copies of this form                     +-----------------------+
                         concurrently with either placing an order                     | WORK LOCATION         |
                         with a broker to execute sale or executing                    |                       |
                         a sale directly with a market maker.                          +-----------------------+
  ------------------------------------------------------------------------------------------------------------------------------------
  1 (a) NAME OF ISSUER  (Please type or print)                                 (b) IRS IDENT. NO.               (c) S.E.C. FILE NO.
  
          Prosperity Bancshares, Inc.                                               74-2331986                       000-25051
  ------------------------------------------------------------------------------------------------------------------------------------
  1 (d) ADDRESS OF ISSUER             STREET           CITY           STATE          ZIP CODE                   (e) TELEPHONE NO.
                                                                                                                ---------------------
                                 4925 San Felipe     Houston          Texas           77027                      AREA CODE |  NUMBER
  
                                                                                                                    713      693-9300
  ------------------------------------------------------------------------------------------------------------------------------------
  2 (a) NAME OF PERSON FOR WHOSE ACCOUNT THE SECURITIES ARE TO BE SOLD         (b) IRS INDENT. NO.              (c) RELATIONSHIP
                                                                                                                    TO ISSUER
                                                                                   76-0663128
        HF Properties, Ltd.                                                                                         Affiliate
  ------------------------------------------------------------------------------------------------------------------------------------
  2 (d) ADDRESS                       STREET           CITY           STATE          ZIP CODE
  
        55 Waugh Drive, Suite 1111                    Houston         Texas            77007
  ------------------------------------------------------------------------------------------------------------------------------------
  INSTRUCTION: The person filing this notice should contact the issuer to obtain
  the I.R.S. Identification Number and the S.E.C. File Number.
  ------------------------------------------------------------------------------------------------------------------------------------
   3(a)            (b)                                SEC USE ONLY  (c)          (d)          (e)          (f)           (g)
    Title of the   Name and Address of Each Broker   --------------  Number of   Aggregate     Number of   Approximate   Name of Each
      Class of     Through Whom the Securities are    Broker-Dealer   Shares       Market       Shares     Date of Sale   Securities
     Securities   to be Offered or Each Market Maker   File Number   or Other      Value       or Other    (See instr.    Exchange
     To be Sold    who is Acquiring the Securities                    Units      (See instr.     Units        3(f))       (See instr.
                                                                    To be Sold      3(d))     Outstanding  (MO. DAY YR.)     3(g))
                                                                    (See instr.               (See instr.
                                                                       3(c))                     3(e))
  ------------------------------------------------------------------------------------------------------------------------------------
  ------------------------------------------------------------------------------------------------------------------------------------
  Common Stock    Keefe Bruyette & Woods, Inc.
                  787 7th Avenue, 4th Floor                            80,000   $1,421,600(1)   18,943,483    03/19/03      Nasdaq
                  New York, New York 10019
  ------------------------------------------------------------------------------------------------------------------------------------
  
  ------------------------------------------------------------------------------------------------------------------------------------
  INSTRUCTIONS:
  1.(a) Name of Issuer
    (b) Issuer's I.R.S. Identification Number
    (c) Issuer's S.E.C. file number, if any
    (d) Issuer's address, including zip code
    (e) Issuer's telephone number, including area code
  2.(a) Name of person for whose account the securities are to be sold
    (b) Such person's I.R.S. identification number, if such person is an entity
    (c) Such person's relationship to the issuer (e.g., officer, director,
        10% stockholder, or member of immediate family of any of the foregoing)
    (d) Such person's address, including zip code
  3.(a) Title of the class of securities being sold
    (b) Name and address of each broker through whom the securities are intended
        to be sold
    (c) Number of shares or other units to be sold (if debt securities, give the
        aggregate face amount)
    (d) Aggregate market value of the securities to be sold as of a specified
        date within 10 days prior to the filing of this notice
    (e) Number of shares or other units of the class outstanding, or if debt
        securities the face amount thereof outstanding, as shown
        by the most recent report or statement published by the issuer
    (f) Approximate date on which the securities are sold
    (g) Name of each securities exchange, if any, on which the securities are
        intended to be sold
  
  ------------
  (1)  Based on the closing price of the Common Stock of Prosperity Bancshares on
       March 17, 2003 of $17.77 per share.
  TABLE I--SECURITIES TO BE SOLD
     Furnish the following information with respect to the acquisition of the
       securities to be sold and with respect to the payment of all or any
            part of the purchase price or other consideration therefor:
  ------------------------------------------------------------------------------------------------------------------------------------
    Title of    Date You                                        Name of Person from Whom Acquired      Amount of   Date of    Nature
    the Class   Acquired  Nature of Acquisition Transaction  (If gift, also give date donor acquired)  Securities  Payment  of Payment
                                                                                                        Acquired
  ------------------------------------------------------------------------------------------------------------------------------------
  ------------------------------------------------------------------------------------------------------------------------------------
  Common Stock   02/23/01  Pursuant to the merger of Commercial   Prosperity Bancshares, Inc.         807,550(2)  02/23/01 Exchange of
                           Bancshares, Inc. and Prosperity                                                                 shares of
                           Bancshares, Inc.                                                                                Commercial
                                                                                                                           Bancshares,
                                                                                                                           Inc. common
                                                                                                                           stock
  ------------------------------------------------------------------------------------------------------------------------------------
  INSTRUCTIONS:
  1. If the securities were purchased and full payment therefor was not made in
     cash at the time of purchase, explain in the table or in a note thereto the
     nature of the consideration given. If the consideration consisted of any note
     or other obligation, or if payment was made in installments describe the
     arrangement and state when the note or other obligation was discharged in
     full or the last installment paid.
  2. If within two years after the acquisition of the securities the person for
     whose account they are to be sold had any short positions, put or other
     option to dispose of securities referred to in paragraph (d)(3) of Rule 144,
     furnish full information with respect thereto.
  ===============================================================================
                TABLE II--SECURITIES SOLD DURING THE PAST 3 MONTHS
    Furnish the following information as to all securities of the issuer sold
      during the past 3 months by the person for whose account the securities
                                  are to be sold.
  
  ------------------------------------------------------------------------------------------------------------------------------------
                                                                                                      Amount of
               Name and Address of Seller             Title of Securities Sold       Date of Sale     Securities     Gross Proceeds
                                                                                                         Sold
  ------------------------------------------------------------------------------------------------------------------------------------
  ------------------------------------------------------------------------------------------------------------------------------------
  Ned S. Holmes Profit Sharing Plan                       Common Stock                12/19/02            7,500         $138,750
  55 Waugh Drive, Suite 1111
  Houston, Texas 77007
  ------------------------------------------------------------------------------------------------------------------------------------
  REMARKS:
  
  (2)  Has been adjusted to give effect to the 2 for 1 stock split effective
       May 31, 2002.
  
  INSTRUCTIONS:
  See the definition of "person" in paragraph (a) of Rule 144. Information is to
  be given not only as to the person for whose account the securities are to be
  sold but also as to all other persons included in that definition. In addition,
  information shall be given as to sales by all persons whose sales are required
  by paragraph (e) of Rule 144 to be aggregated with sales for the account of the
  person filing this notice.
  ATTENTION:
  The Person for whose account the securities to which this notice relates are to
  be sold hereby represents by signing this notice that he does not know any
  material adverse information in regard to the current and prospective operations
  of the Issuer of the securities to be sold which has not been publicly
  disclosed.
  
                     03/18/03
  ----------------------------------------------
                 DATE OF NOTICE
  
               /s/ Ned S. Holmes
  ----------------------------------------------
      Ned S. Holmes, Managing General Partner
  
    The notice shall be signed by the person for whose account the securities
        are to be sold. At least one copy of the notice shall be manually
             signed. Any copies not manually signed shall bear typed
                              or printed signatures.
  -------------------------------------------------------------------------------
       ATTENTION: Intentional misstatements or omission of facts constitute
                 Federal Criminal Violations (See 18 U.S.C. 1001).
  -------------------------------------------------------------------------------