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 ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2024 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from ______________ to ______________. Commission file number: 001-37621 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 26-051355 ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Number) (I.R.S. Employer incorporation or organization) Identification Number) 400 East Thomas Street Hammond, Louisiana 70401 (Address of principal executive offices) (Zip Code) FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 5, 2025 FIRST GUARANTY BANCSHA ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2024 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT For the transition period from __________ to __________ Commission File Number: 001-37621 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 26-0513559 (State ...

EXHIBIT 99.1 OCTOBER 30, 2024 NEWS FOR IMMEDIATE RELEASE CONTACT: ERIC J. DOSCH, CFO 985.375.0308 First Guaranty Bancshares, Inc. Announces Third Quarter 2024 Financial Results Hammond, Louisiana, October 30, 2024 – First Guaranty Bancshares, Inc. ("First Guaranty") (NASDAQ: FGBI), the holding company for First Guaranty Bank, announced its unaudited financial results for the third quarter and nine months ending September 30, 2024. Financial Highlights for the third quarter and nine months ended September 30 ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2024 or (State or other jurisdiction incorporation or organization) (I.R.S. Employer Identification Number) 400 East Thomas Street Hammond, Louisiana 70401 (Address of principal executive offices) (Zip Code) ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT For the t ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2024 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT For the transition period from __________ to __________ Commission File Number: 001-37621 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 26-0513559 (State or ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2023 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from ______________ to ______________. Commission file number: 001-37621 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 26-051355 ...

Form 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2023 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT For the transition period from __________ to __________ UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Commission File Number: 001-37621 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 26-0513559 (State ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2023 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT For the transition period from __________ to __________ Commission File Number: 001-37621 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 26-0513559 (State or o ...