Trustmark Corporation to Announce First Quarter Financial Results April 27 and Conduct Earnings Conference Call April 28

Trustmark Corporation (Nasdaq:TRMK) will announce its first quarter 2021 financial results in a news release on Tuesday, April 27, 2021, after close of the market. Duane A. Dewey, President and Chief Executive Officer, will conduct a conference call with analysts on Wednesday, April 28, 2021, at 8:30 a.m. Central Time to discuss the Corporation’s financial results. Interested parties may listen to the conference call by dialing [phone] or by clicking on the link provided under the Investor Relations section of our website at www.trustmark.com. A replay of the conference call will also be available through Wednesday, May 12, 2021, in archived format at the same web address or by calling [phone], passcode 10153927.

Trustmark is a financial services company providing banking and financial solutions through 181 offices in Alabama, Florida, Mississippi, Tennessee and Texas.

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Trustmark Contacts: Investors: Thomas C. Owens Treasurer and Principal Financial Officer 601-208-7853

F. Joseph Rein, Jr. Senior Vice President 601-208-6898

Media: Melanie A. Morgan Senior Vice President 601-208-2979