UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                                  SCHEDULE 13G
                   Under the Securities Exchange Act of 1934
                              (Amendment No. 2005)

                             TRUSTMARK CORPORATION
                                (Name of Issuer)

                                  COMMON STOCK
                         (Title of Class of Securities)

                                   898402102
                                 (CUSIP Number)

                               December 31, 2005
            (Date of Event Which Requires Filing of this Statement)


Check the appropriate box to designate the rule pursuant to which this Schedule
is filed:

                                [X] Rule 13d-1(b)
                                [ ] Rule 13d-1(c)
                                [ ] Rule 13d-1(d)

*The remainder of this cover page shall be filled out for a reporting  person's
initial filing on this form with respect to  the subject class  of  securities,
and for any subsequent  amendment containing  information which would alter the
disclosures provided in a prior cover page.

The  information required  in the remainder  of this  cover page  shall  not be
deemed to be "filed" for the purpose of  Section 18 of  the Securities Exchange
Act of 1934 ("Act") or  otherwise subject  to the liabilities  of that  section
of the Act but shall  be subject to all  other  provisions of the Act (however,
see the Notes).






CUSIP No. 898402102

1.  NAME OF REPORTING PERSON
    I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

    Trustmark National Bank, as trustee
    64-0180810

2.  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

    (a)  [ ]
    (b)  [ ]

3.   SEC USE ONLY

4.  CITIZENSHIP OR PLACE OF ORGANIZATION

    Organized under the laws of the United States

NUMBER OF       5.   SOLE VOTING POWER        1,267,277
SHARES
BENEFICIALLY    6.   SHARED VOTING POWER        131,623
OWNED BY
EACH            7.   SOLE DISPOSITIVE POWER   1,267,277
REPORTING
PERSON          8.   SHARED DISPOSITIVE POWER   131,623
WITH:

9.   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

     1,398,900

10.  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES

     [ ]

11.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

     2.5%

12.  TYPE OF REPORTING PERSON

     BK



CUSIP No. 898402102

Item 1(a) Name of Issuer:

          Trustmark Corporation

Item 1(b) Address of Issuer's Principal Executive Offices:

          248 East Capitol Street
          Jackson, Mississippi 39201

Item 2(a) Name of Person Filing:

          Trustmark National Bank, as trustee

Item 2(b) Address of Principal Business Office:

          248 East Capitol Street
          Jackson, Mississippi 39201

Item 2(c) Citizenship:

          Organized under the laws of the United States

Item 2(d) Title of Class of Securities:

          Common Stock

Item 2(e) CUSIP Number:

          898402102

Item 3    Type of Person:

          (b) Bank [x] Bank as defined in section 3(a)(6) of the Act (15
              U.S.C. 78c).

Item 4    Ownership:

          (a) Amount beneficially owned:  1,398,900
          (b) Percent of class:  2.5%
          (c) Number of shares as to which the person has:
                  (i)   Sole power to vote or to direct the vote
                        1,267,277

                  (ii)  Shared power to vote or to direct the vote
                        131,623

                  (iii) Sole power to dispose or to direct the disposition of
                        1,267,277

                  (iv)  Shared power to dispose or to direct the disposition of
                        131,623

Item 5    Ownership of Five Percent or Less of a Class:

          N/A



CUSIP No. 898402102

Item 6    Ownership of More than Five Percent on Behalf of Another Person:

          The  shares  referred  to in this Schedule 13G are held  by  Trustmark
          National Bank as trustee of various trust accounts. Trustmark National
          Bank does not  have the  right to  receive  the dividends  from  these
          shares or to receive proceeds from the sale of these shares. Trustmark
          National Bank is not  aware of any individual  trust or beneficiary or
          related group of trusts or beneficiaries  who own more than 5% of this
          stock.

Item 7    Identification  and Classification  of the Subsidiary  Which  Acquired
          the Security Being Reported on by the Parent Holding Company:

          N/A

Item 8    Identification and Classification of Members of the Group:

          N/A

Item 9    Notice of Dissolution of Group:

          N/A

Item 10   Certification:

          By signing  below  I  certify  that, to  the best  of my knowledge and
          belief, the securities referred to above were acquired and are held in
          the ordinary course of business and were not acquired and are not held
          for the purpose of or with the effect of changing  or  influencing the
          control of the issuer of the securities  and were not acquired and are
          not held in  connection with  or as a  participant in any  transaction
          having that purpose or effect.

Signature:

After reasonable inquiry  and to the best  of my knowledge and belief, I certify
that the information set forth in this statement is true, complete and correct.

Date:            February 13, 2006

Signature:       /s/ Louis E. Greer

Name and Title:  Louis E. Greer
                 Senior Vice President
                 And Chief Accounting Officer