EXHIBIT 99.1 APRIL 29, 2025 NEWS FOR IMMEDIATE RELEASE CONTACT: ERIC J. DOSCH, CFO 985.375.0308 First Guaranty Bancshares, Inc. Announces First Quarter 2025 Financial Results Hammond, Louisiana, April 29, 2025 – First Guaranty Bancshares, Inc. ("First Guaranty") (NASDAQ: FGBI), the holding company for First Guaranty Bank, announced its unaudited financial results for the first quarter and three months ending March 31, 2025. Financial Highlights for the first quarter ended March 31, 2025, are as follows: • F ...