Hancock Whitney Corporation to acquire Trustmark Corporation Creating long-term value for shareholders through compelling combination
TRUSTMARK CORP (TRMK) filed an SEC Form 8-K — Regulation FD Disclosure. Exhibit 99.1 FOR IMMEDIATE RELEASE November 12, 2026 For more information: Ashleigh Flower Wilshire SVP, Head of Investor Relations 504.299.5076 ashleigh.wilshire@hancockwhitney.com F. Joseph Rein, Jr. EVP, Chief Corporate Strategy Officer 601.208.6898 jrein@trustmark.com Hancock

