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Exhibit 5.1

 

        Wachtell, Lipton, Rosen & Katz       

MARTIN LIPTON

HERBERT M. WACHTELL

BERNARD W. NUSSBAUM

LAWRENCE B. PEDOWITZ

PAUL VIZCARRONDO, JR.

PETER C. HEIN

HAROLD S. NOVIKOFF

KENNETH B. FORREST

MEYER G. KOPLOW

THEODORE N. MIRVIS

EDWARD D. HERLIHY

DANIEL A. NEFF

ERIC M. ROTH

ANDREW R.  BROWNSTEIN

MICHAEL H. BYOWITZ

PAUL K. ROWE

MARC WOLINSKY

DAVID GRUENSTEIN

STEPHEN G. GELLMAN

STEVEN A. ROSENBLUM

    

STEPHANIE J. SELIGMAN

JOHN F. SAVARESE

SCOTT K. CHARLES

DAVID S. NEILL

JODI J. SCHWARTZ

ADAM O. EMMERICH

GEORGE T. CONWAY III

RALPH M. LEVENE

RICHARD G. MASON

MICHAEL J. SEGAL

DAVID M. SILK

ROBIN PANOVKA

DAVID A. KATZ

ILENE KNABLE GOTTS

DAVID M. MURPHY

JEFFREY M. WINTNER

TREVOR S. NORWITZ

BEN M. GERMANA

ANDREW J. NUSSBAUM

RACHELLE SILVERBERG

  

51 WEST 52ND STREET

NEW YORK, N.Y. 10019-6150

TELEPHONE: (212) 403-1000

FACSIMILE: (212) 403-2000

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GEORGE A. KATZ (1965-1989)

JAMES H. FOGELSON (1967-1991)

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OF COUNSEL

 

DAVID C. BRYAN

STEVEN A. COHEN

DEBORAH L. PAUL

DAVID C. KARP

RICHARD K. KIM

JOSHUA R. CAMMAKER

MARK GORDON

JOSEPH D. LARSON

LAWRENCE S. MAKOW

JEANNEMARIE O’BRIEN

WAYNE M. CARLIN

STEPHEN R. DiPRIMA

NICHOLAS G. DEMMO

IGOR KIRMAN

JONATHAN M. MOSES

T. EIKO STANGE

DAVID A. SCHWARTZ

JOHN F. LYNCH

WILLIAM SAVITT

ERIC M. ROSOF

    

MARTIN J.E. ARMS

GREGORY E. OSTLING

DAVID B. ANDERS

ADAM J. SHAPIRO

NELSON O. FITTS

JEREMY L. GOLDSTEIN

JOSHUA M. HOLMES

DAVID E. SHAPIRO

DAMIAN G. DIDDEN

ANTE VUCIC

IAN BOCZKO

MATTHEW M. GUEST

DAVID E. KAHAN

DAVID K. LAM

BENJAMIN M. ROTH

JOSHUA A. FELTMAN

ELAINE P. GOLIN

EMIL A. KLEINHAUS

KARESSA L. CAIN

       

WILLIAM T. ALLEN

PETER C. CANELLOS

DAVID M. EINHORN

THEODORE GEWERTZ

RICHARD D. KATCHER

THEODORE A. LEVINE

DOUGLAS K. MAYER

ROBERT B. MAZUR

PHILIP MINDLIN

ROBERT M. MORGENTHAU

    

ERIC S. ROBINSON

PATRICIA A. ROBINSON*

LEONARD M. ROSEN

MICHAEL W. SCHWARTZ

ELLIOTT V. STEIN

WARREN R. STERN

PATRICIA A. VLAHAKIS

J. BRYAN WHITWORTH

AMY R. WOLF

      
       

* ADMITTED IN THE DISTRICT OF COLUMBIA

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COUNSEL

      
       

DAVID M. ADLERSTEIN

MICHELE J. ALEXANDER

LOUIS J. BARASH

DIANNA CHEN

ANDREW J.H. CHEUNG

PAMELA EHRENKRANZ

KATHRYN GETTLES-ATWA

    

PAULA N. GORDON

NANCY B. GREENBAUM

MAURA R. GROSSMAN

MARK A. KOENIG

J. AUSTIN LYONS

AMANDA N. PERSAUD

JEFFREY A. WATIKER

      

 

August 7, 2012

Trustmark Corporation

248 East Capitol Street

Jackson, Mississippi 39201

Ladies and Gentlemen:

We have acted as special counsel to Trustmark Corporation, a Mississippi corporation (the “Company”), and are furnishing this opinion letter to the Company in connection with its filing of a Registration Statement on Form S-4 (the “Registration Statement,” which term does not include any other document or agreement whether or not specifically referred to therein or attached as an exhibit or schedule thereto) with the U.S. Securities and Exchange Commission (the “SEC”) on July 6, 2012. The Registration Statement relates to the registration under the U.S. Securities Act of 1933, as amended (the “Securities Act”), of the offering by the Company of up to 2,245,923 shares (the “Shares”) of the Company’s common stock, no par value (the “Common Stock”), which may be issued to the shareholders of BancTrust Financial Group, Inc., an Alabama corporation (“BancTrust”), in connection with the merger of BancTrust with and into Trustmark, as contemplated by the Agreement and Plan of Reorganization, dated as of May 28, 2012 (the “Merger Agreement”), by and between the Company and BancTrust (the “Merger”).

For the purposes of giving the opinion contained herein, we have examined the Registration Statement, the Merger Agreement, the articles of incorporation of the Company, as amended, the amended and restated bylaws of the Company, and a specimen certificate representing the Common Stock. We have also examined the originals, or duplicates or certified or conformed copies, of such corporate records, agreements, documents and other instruments and have made such other investigations as we have deemed relevant and necessary in connection with the opinion set forth below. As to questions of fact material to this opinion, we have relied, with your approval, upon certificates or comparable documents of public officials and of officers and representatives of the Company.

In making such examination and rendering the opinion set forth below, we have assumed without verification the genuineness of all signatures, the authenticity of all documents submitted to us as originals, the authenticity of the originals of such documents submitted to us as certified copies, the conformity to originals of all documents submitted to us as copies and the authenticity of the originals of such documents, that all documents submitted to us as certified copies are true and correct copies of such originals, and the legal capacity of all individuals executing any of the foregoing documents. In rendering the opinion set forth below, we have also assumed that (a) prior to the issuance of any Shares pursuant to the Merger Agreement, the Registration Statement, as then amended, will have become effective under the Securities Act and such effectiveness will not have been terminated or rescinded and (b) if issued in physical form, certificates representing the Shares in the form of the specimen certificate examined by us have been manually signed by an authorized officer of the transfer agent and registrar for the Common Stock and registered by such transfer agent and registrar or, if issued in book entry form, an appropriate account statement evidencing Shares credited to the recipients’ accounts maintained with the transfer agent has been issued by said transfer agent.


Based on the foregoing, and subject to the qualifications, assumptions and limitations set forth herein, we are of the opinion that when the Registration Statement has been declared effective by the SEC and the Shares have been issued and paid for in accordance with the terms and conditions set forth in the Merger Agreement, the Shares will be validly issued, fully paid and nonassessable.

We are members of the Bar of the State of New York and we express no opinion herein as to any law other than the federal laws of the United States and the laws of the State of New York.

We hereby consent to be named in the Registration Statement and in the related joint proxy statement/prospectus contained therein as the attorneys who passed upon the legality of the Shares and to the filing of a copy of this opinion as Exhibit 5.1 to the Registration Statement. In giving such consent, we do not thereby admit that we are in the category of persons whose consent is required under Section 7 of the Securities Act. We assume no obligation to advise you or any other person, or to make any investigations, as to any legal developments or factual matters arising subsequent to the date of effectiveness of the Registration Statement that might affect the opinion expressed herein.

Very truly yours,

/s/ Wachtell, Lipton, Rosen & Katz