Trustmark, Banctrust Aends Merger for Early 2013 Close, Says Latest Possible Closing February 28

Trustmark Corporation

(“Trustmark”) and BancTrust Financial Group, Inc.

(“BancTrust”) announced that the definitive agreement dated May 28, 2012, pursuant to which BancTrust will merge into Trustmark has been amended to accommodate the closing of the merger in early 2013. As such, the latest possible closing date for the merger has been extended from December 31, 2012, to February 28, 2013. This extension provides additional time in which to receive regulatory approval as well as to ensure a smooth transition and operational conversion to Trustmark systems in early 2013. All other material aspects of the definitive agreement remain unchanged.