Trustmark National Bank to purchase Oxford, MS branch offices of SOUTHBank, F.S.B.

  Trustmark National Bank to purchase Oxford, MS branch offices of SOUTHBank,
  F.S.B.

Business Wire

JACKSON, Miss. -- March 29, 2013

Trustmark National Bank, a subsidiary of Trustmark Corporation (NASDAQ:TRMK),
today announced the signing of a definitive Branch Purchase and Assumption
Agreement pursuant to which it will acquire the two branches of SOUTHBank,
F.S.B., serving the Oxford, Mississippi, market. The Agreement contemplates
the assumption of selected deposit accounts of approximately $11.8 million as
well as the purchase of the physical branch offices. The proposed transaction,
which is subject to regulatory approval and customary closing conditions, is
expected to be completed during the summer of 2013.

Gerard R. Host, President and CEO of Trustmark, stated, “We look forward to
welcoming the Oxford customers and associates of SOUTHBank to the Trustmark
family. This transaction provides our existing Oxford customers with the added
convenience of well-positioned banking offices on the Courthouse Square and
Jackson Avenue. We will be communicating directly with each deposit customer
of SOUTHBank’s Oxford offices with detailed information about the transition
of their deposit accounts to Trustmark. At this time, SOUTHBank and Trustmark
customers should continue to conduct their banking business as usual, using
existing branches, checks and ATM or debit cards. Following system changes and
conversion, customers of SOUTHBank’s Oxford offices will have an expanded
offering of products and services, as well as the added convenience provided
by approximately 220 Trustmark banking centers in Alabama, Florida,
Mississippi, Tennessee and Texas.”

Additional Information

Trustmark Corporation is a financial services company providing banking and
financial solutions through approximately 220 offices in Alabama, Florida,
Mississippi, Tennessee and Texas.

Forward-Looking Statements

Certain statements contained in this document constitute forward-looking
statements within the meaning of the Private Securities Litigation Reform Act
of 1995. You can identify forward-looking statements by words such as “may,”
“hope,” “will,” “should,” “expect,” “plan,” “anticipate,” “intend,” “believe,”
“estimate,” “predict,” “potential,” “continue,” “could,” “future” or the
negative of those terms or other words of similar meaning. You should read
statements that contain these words carefully because they discuss our future
expectations or state other “forward-looking” information. These
forward-looking statements include, but are not limited to, statements
relating to anticipated future operating and financial performance measures,
including net interest margin, credit quality, business initiatives, growth
opportunities and growth rates, among other things, and encompass any
estimate, prediction, expectation, projection, opinion, anticipation, outlook
or statement of belief included therein as well as the management assumptions
underlying these forward-looking statements. You should be aware that the
occurrence of the events described under the caption “Risk Factors” in
Trustmark’s filings with the Securities and Exchange Commission could have an
adverse effect on our business, results of operations and financial condition.
Should one or more of these risks materialize, or should any such underlying
assumptions prove to be significantly different, actual results may vary
significantly from those anticipated, estimated, projected or expected.

Risks that could cause actual results to differ materially from current
expectations of Management include, but are not limited to, changes in the
level of nonperforming assets and charge-offs, local, state and national
economic and market conditions, including the extent and duration of the
current volatility in the credit and financial markets, changes in our ability
to measure the fair value of assets in our portfolio, material changes in the
level and/or volatility of market interest rates, the performance and demand
for the products and services we offer, including the level and timing of
withdrawals from our deposit accounts, the costs and effects of litigation and
of unexpected or adverse outcomes in such litigation, our ability to attract
noninterest-bearing deposits and other low-cost funds, competition in loan and
deposit pricing, as well as the entry of new competitors into our markets
through de novo expansion and acquisitions, economic conditions, including the
potential impact of the European financial crisis on the U.S. economy and the
markets we serve, and monetary and other governmental actions designed to
address the level and volatility of interest rates and the volatility of
securities, currency and other markets, the enactment of legislation and
changes in existing regulations, or enforcement practices, or the adoption of
new regulations, changes in accounting standards and practices, including
changes in the interpretation of existing standards, that affect our
consolidated financial statements, changes in consumer spending, borrowings
and savings habits, technological changes, changes in the financial
performance or condition of our borrowers, changes in our ability to control
expenses, changes in our compensation and benefit plans, greater than expected
costs or difficulties related to the integration of acquisitions or new
products and lines of business, natural disasters, environmental disasters,
acts of war or terrorism, the ability to maintain relationships with
customers, employees or suppliers as well as the ability to successfully
integrate the business and realize cost savings and any other synergies from
the BancTrust Financial Group, Inc., (BancTrust) merger as well as the risk
that the credit ratings of the combined company or its subsidiaries may be
different from what the companies expect, and other risks described in our
filings with the Securities and Exchange Commission.

Although we believe that the expectations reflected in such forward-looking
statements are reasonable, we can give no assurance that such expectations
will prove to be correct. Except as required by law, we undertake no
obligation to update or revise any of this information, whether as the result
of new information, future events or developments or otherwise.

Contact:

Trustmark Corporation
Investor Contacts:
Louis E. Greer, 601-208-2310
Treasurer and Principal Financial Officer
or
F. Joseph Rein, Jr., 601-208-6898
Senior Vice President
or
Media Contact:
Melanie A. Morgan, 601-208-2979
Senior Vice President