Trustmark Corporation is the holding company for Trustmark National Bank, which has more than 150 locations, mainly in Mississippi, but also in East Texas, the Florida panhandle, and Tennessee, where it also operates its Somerville Bank & Trust subsidiary. Focusing on individuals and small businesses, Trustmark offers a range of financial products and services such as checking and savings accounts, certificates of deposit, credit cards, insurance, investments, and trust services. Trustmark National Bank traces its roots to 1889 when it was first chartered in Mississippi.