Company Update

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 March 14, 2019 Date of Report (Date of earliest event reported)     TRUSTMARK CORPORATION (Exact name of registrant as specified in its charter) Mississippi 000-03683 64-0471500 (State or other jurisdiction of incorporation) (Commission File Number) (IRS Employer Identification No.) 248 East Capitol Street, Jackson, Mississippi 39201   (Address of principal executive offices) (Zip Code)     Registrant’s telephone number, including area code: (601) 208-5111 Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2).  Emerging growth company  ☐   If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  ☐ Item 8.01. Other Events. Trustmark Corporation (the “Company”) today announced that, effective April 1, 2019, the Board of Directors has authorized a new stock repurchase program under which $100,000,000 of its outstanding common shares may be acquired through March 31, 2020. The adoption of the Company’s share repurchase program follows the receipt of non-objection from the Board of Governors of the Federal Reserve System. The shares may be purchased from time to time at prevailing market prices, through open market or privately negotiated transactions, depending on market conditions. There is no guarantee as to the number of shares that may be repurchased by the Company, and the Company may discontinue purchases at any time at management’s discretion. As of March 14 , 2019, the Company had approximately 64.9 million shares outstanding. SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. TRUSTMARK CORPORATION BY: /s/ Louis E. Greer Louis E. Greer Treasurer and Principal Financial Officer DATE: March 14, 2019