FGBI / First Guaranty Bancshares, Inc. - Arquivamentos da SEC, Relatório Anual, Declaração de Procuração

First Guaranty Bancshares, Inc.
US ˙ NasdaqGM ˙ US32043P1066

Estatísticas Básicas
LEI 549300600XNPWN48W622
CIK 1408534
SEC Filings
All companies that sell securities in the United States must register with the Securities and Exchange Commission (SEC) and file reports on a regular basis. These reports include company annual reports (10K, 10Q), news updates (8K), investor presentations (found in 8Ks), insider trades (form 4), ownership reports (13D, and 13G), and reports related to the specific securities sold, such as registration statements and prospectus. This page shows recent SEC filings related to First Guaranty Bancshares, Inc.
SEC Filings (Chronological Order)
Esta página fornece uma lista completa e cronológica de Arquivamentos da SEC, excluindo os arquivamentos de propriedade que fornecemos em outro lugar.
June 4, 2026 8-K

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 Date of Report (Date of earliest event reported): June 4, 2026 FIRST GUARANTY BANCS

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 Date of Report (Date of earliest event reported): June 4, 2026 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Number

May 22, 2026 8-K

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 Date of Report (Date of earliest event reported): May 21, 2026 FIRST GUARANTY BANCS

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 Date of Report (Date of earliest event reported): May 21, 2026 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Number

May 13, 2026 10-Q

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, 2026 ☐ TRANSITION REPORT PURSUANT TO

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, 2026 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, I

May 12, 2026 ARS

ARS

2025 ANNUAL REPORT fgb.net ® 1 HONORING 48 YEARS OF LEADERSHIP AND DEDICATION IN MEMORY OF For 48 years, Bill gave his all to the bank. His dedication wasn’t just to FGB's mission, but to its people and its future. He believed deeply in what we stood for, and that belief showed in everything he did. His service did not simply influence our story; it helped write it. Serving on the Board was deeply

May 7, 2026 EX-99.1

FI R ST G UA R A N TY B A N CS H A R ES , I N C. Po st O ffi ce B ox 2 00 9 H am m on d, L ou is ia na 7 04 04 -2 00 9 PR ES O R TE D FI R ST -C LA SS M A IL U. S. P O ST AG E PA ID B AT O N R O UG E, L A PE R M IT N O . 9 84 FIRST GUARANTY BANCSHARE

a20261stquarterreport FI R ST G UA R A N TY B A N CS H A R ES , I N C. Po st O ffi ce B ox 2 00 9 H am m on d, L ou is ia na 7 04 04 -2 00 9 PR ES O R TE D FI R ST -C LA SS M A IL U. S. P O ST AG E PA ID B AT O N R O UG E, L A PE R M IT N O . 9 84 FIRST GUARANTY BANCSHARES, INC. 1st Quarter Report 2026 At A Glance (unaudited) Member FDIC fgb.net | Total Assets $4.0 Billion Deposits $3.5 Billion Lo

May 7, 2026 8-K

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 Date of Report (Date of earliest event reported): May 7, 2026 FIRST GUARANTY BANCSH

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 Date of Report (Date of earliest event reported): May 7, 2026 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Number)

May 5, 2026 8-K

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 Date of Report (Date of earliest event reported): April 29, 2026 FIRST GUARANTY BAN

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 Date of Report (Date of earliest event reported): April 29, 2026 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Numb

May 1, 2026 8-K

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 Date of Report (Date of earliest event reported): May 1, 2026 FIRST GUARANTY BANCSH

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 Date of Report (Date of earliest event reported): May 1, 2026 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Number)

April 27, 2026 8-K

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 Date of Report (Date of earliest event reported): April 27, 2026 FIRST GUARANTY BAN

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 Date of Report (Date of earliest event reported): April 27, 2026 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Numb

April 27, 2026 EX-99.1

First Guaranty Bancshares, Inc. Announces First Quarter 2026 Financial Results

EXHIBIT 99.1 APRIL 27, 2026 NEWS FOR IMMEDIATE RELEASE CONTACT: ERIC J. DOSCH, CFO 985.375.0308 First Guaranty Bancshares, Inc. Announces First Quarter 2026 Financial Results Hammond, Louisiana, April 27, 2026 – 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 mo

April 22, 2026 8-K

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 Date of Report (Date of earliest event reported): April 16, 2026 FIRST GUARANTY BAN

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 Date of Report (Date of earliest event reported): April 16, 2026 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Numb

April 21, 2026 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. __ )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitted by Rule 14a 6(e)(2)) x Defin

March 31, 2026 10-K

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, 2025 ☐ TRANSITION REPORT PURSUANT TO SECTI

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, 2025 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 BANCSHAR

March 24, 2026 8-K

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 Date of Report (Date of earliest event reported): March 20, 2026 FIRST GUARANTY BAN

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 Date of Report (Date of earliest event reported): March 20, 2026 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Numb

March 24, 2026 EX-10.1

SECOND AMENDMENT TO THE PROMISSORY NOTE This SECOND AMENDMENT TO THE PROMISSORY NOTE (this "Amendment") is made and entered into in respect of that certain Promissory Note, dated October 5, 2023 (the "Note"), by and between First Guaranty Bancshares,

ex101secondamendmenttoth SECOND AMENDMENT TO THE PROMISSORY NOTE This SECOND AMENDMENT TO THE PROMISSORY NOTE (this "Amendment") is made and entered into in respect of that certain Promissory Note, dated October 5, 2023 (the "Note"), by and between First Guaranty Bancshares, Inc.

March 24, 2026 EX-10.2

SECOND AMENDMENT TO THE FIRST GUARANTY BANCSHARES' INC. FLOATING RATE SUBORDINATED NOTE DUE MARCH28,2O34 ThiS SECOND AMENDMENT TO THE FIRST GUARANTY BANCSHARES, INC. FLOATING RATE SUBORDINATED NOTE DUE MARCH28,2034 (this "Amendment") is made and ente

ex102secondamendmenttoth SECOND AMENDMENT TO THE FIRST GUARANTY BANCSHARES' INC. FLOATING RATE SUBORDINATED NOTE DUE MARCH28,2O34 ThiS SECOND AMENDMENT TO THE FIRST GUARANTY BANCSHARES, INC. FLOATING RATE SUBORDINATED NOTE DUE MARCH28,2034 (this "Amendment") is made and entered into in respect of that certain First Guaranty Bancshares, Inc. Floating Rate Subordinated Note due March 28, 2034 (the "

March 17, 2026 8-K

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 Date of Report (Date of earliest event reported): March 17, 2026 FIRST GUARANTY BAN

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 Date of Report (Date of earliest event reported): March 17, 2026 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Numb

March 10, 2026 EX-99.1

First Guaranty Bancshares, Inc. Announces Sale of Texas Operations

EXHIBIT 99.1 March 10, 2026 NEWS FOR IMMEDIATE RELEASE CONTACT: ERIC J. DOSCH, CFO 985.375.0308 First Guaranty Bancshares, Inc. Announces Sale of Texas Operations Hammond, Louisiana, March 10, 2026 – First Guaranty Bancshares, Inc. ("First Guaranty") (NASDAQ: FGBI), the holding company for First Guaranty Bank, announced that it has executed a definitive purchase and assumption agreement for the sa

March 10, 2026 8-K

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 Date of Report (Date of earliest event reported): March 10, 2026 FIRST GUARANTY BAN

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 Date of Report (Date of earliest event reported): March 10, 2026 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Numb

February 20, 2026 8-K

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 Date of Report (Date of earliest event reported): February 20, 2026 FIRST GUARANTY

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 Date of Report (Date of earliest event reported): February 20, 2026 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File N

February 20, 2026 EX-99.1

PR ES O R TE D FI R ST -C LA SS M A IL U. S. P O ST AG E PA ID B AT O N R O UG E, L A PE R M IT N O . 9 84 Total Assets $4.1 Billion Deposits $3.6 Billion Locations 30 ATMs 40 $2.5 Million 4Q 2025 Earnings $(56.0) Million YTD2025 Earnings 130 Consecu

a20254thquarterreport PR ES O R TE D FI R ST -C LA SS M A IL U. S. P O ST AG E PA ID B AT O N R O UG E, L A PE R M IT N O . 9 84 Total Assets $4.1 Billion Deposits $3.6 Billion Locations 30 ATMs 40 $2.5 Million 4Q 2025 Earnings $(56.0) Million YTD2025 Earnings 130 Consecutive dividends paid and counting 91 Years in Banking Total Loans $2.1 Billion Member FDIC FIRST GUARANTY BANCSHARES, INC. 4th Qu

February 9, 2026 8-K

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 Date of Report (Date of earliest event reported): February 9, 2026 FIRST GUARANTY B

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 Date of Report (Date of earliest event reported): February 9, 2026 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Nu

January 28, 2026 EX-99.1

First Guaranty Bancshares, Inc. Announces Fourth Quarter and Fiscal Year 2025 Results

EXHIBIT 99.1 January 28, 2026 NEWS FOR IMMEDIATE RELEASE CONTACT: ERIC J. DOSCH, CFO 985.375.0308 First Guaranty Bancshares, Inc. Announces Fourth Quarter and Fiscal Year 2025 Results Hammond, Louisiana, January 28, 2026 – First Guaranty Bancshares, Inc. ("First Guaranty") (NASDAQ: FGBI), the holding company for First Guaranty Bank, announced its unaudited financial results for the quarter and yea

January 28, 2026 8-K

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 Date of Report (Date of earliest event reported): January 28, 2026 FIRST GUARANTY B

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 Date of Report (Date of earliest event reported): January 28, 2026 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Nu

December 10, 2025 8-K

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 Date of Report (Date of earliest event reported): December 10, 2025 FIRST GUARANTY

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 Date of Report (Date of earliest event reported): December 10, 2025 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File N

December 4, 2025 EX-99.1

EX-99.1 PRESS RELEASE

EXHIBIT 99.1 Dear Shareholders, We are pleased to announce the appointment of Evan Singer as Chief Lending Officer at First Guaranty Bank. The previous Chief Lending Officer resigned in November to pursue other opportunities. Evan brings over 16 years of banking experience and a proven record of leadership in credit and lending. His return to First Guaranty Bank marks a significant step forward in

December 4, 2025 8-K

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 Date of Report (Date of earliest event reported): December 4, 2025 FIRST GUARANTY B

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 Date of Report (Date of earliest event reported): December 4, 2025 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Nu

November 17, 2025 10-Q

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, 2025 ☐ TRANSITION REPORT PURSUANT

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, 2025 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 BANCSHARE

November 14, 2025 8-K

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 Date of Report (Date of earliest event reported): November 14, 2025 FIRST GUARANTY

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 Date of Report (Date of earliest event reported): November 14, 2025 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File N

November 14, 2025 EX-99.1

PR ES O R TE D FI R ST -C LA SS M A IL U. S. P O ST AG E PA ID B AT O N R O UG E, L A PE R M IT N O . 9 84 Total Assets $3.8 Billion Deposits $3.4 Billion Locations 31 ATMs 40 $(45.0) Million 3Q 2025 Earnings $(58.5) Million YTD2025 Earnings 129 Cons

a20253rdquarterreportxd PR ES O R TE D FI R ST -C LA SS M A IL U. S. P O ST AG E PA ID B AT O N R O UG E, L A PE R M IT N O . 9 84 Total Assets $3.8 Billion Deposits $3.4 Billion Locations 31 ATMs 40 $(45.0) Million 3Q 2025 Earnings $(58.5) Million YTD2025 Earnings 129 Consecutive dividends paid and counting 91 Years in Banking Total Loans $2.3 Billion Member FDIC FIRST GUARANTY BANCSHARES, INC. 3

November 10, 2025 NT 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 12b-25 NOTIFICATION OF LATE FILING

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 12b-25 NOTIFICATION OF LATE FILING (Check one): ☐ Form 10-K ☐ Form 20-F ☐ Form 11-K ☒ Form 10-Q ☐ Form 10-D ☐ Form N-CEN ☐ Form N-CSR For Period Ended: September 30, 2025 ☐ Transition Report on Form 10-K ☐ Transition Report on Form 20-F ☐ Transition Report on Form 11-K ☐ Transition Report on Form 10-Q ☐ Transition Report

November 5, 2025 8-K

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 Date of Report (Date of earliest event reported): November 5, 2025 FIRST GUARANTY B

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 Date of Report (Date of earliest event reported): November 5, 2025 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Nu

October 31, 2025 8-K

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 Date of Report (Date of earliest event reported): October 31, 2025 FIRST GUARANTY B

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 Date of Report (Date of earliest event reported): October 31, 2025 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Nu

October 31, 2025 EX-99.1

First Guaranty Bancshares, Inc. Announces Third Quarter 2025 Financial Results

EXHIBIT 99.1 OCTOBER 31, 2025 NEWS FOR IMMEDIATE RELEASE CONTACT: ERIC J. DOSCH, CFO 985.375.0308 First Guaranty Bancshares, Inc. Announces Third Quarter 2025 Financial Results Hammond, Louisiana, October 31, 2025 – 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

October 10, 2025 D

D

X0708 D LIVE 0001408534 First Guaranty Bancshares, Inc. 400 EAST THOMAS STREET HAMMOND LA LOUISIANA 70401 985-345-7685 LOUISIANA None None Corporation true Michael R. Mineer 400 East Thomas Street Hammond LA LOUISIANA 70401 Executive Officer Eric Dosch 400 East Thomas Street Hammond LA LOUISIANA 70401 Executive Officer Marshall T. Reynolds 400 East Thomas Street Hammond LA LOUISIANA 70401 Director

August 25, 2025 8-K

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 Date of Report (Date of earliest event reported): August 25, 2025 FIRST GUARANTY BA

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 Date of Report (Date of earliest event reported): August 25, 2025 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Num

August 25, 2025 EX-99.1

P R E S O R T E D F IR S T -C L A S S M A IL U .S . P O S TA G E P A ID B A T O N R O U G E , L A P E R M IT N O . 9 8 4 Total Assets $4.0Billion Deposits $3.5Billion Locations 31 ATMs 42 $(7.3)Million 2Q 2025 Earnings $(13.5)Million YTD2025 Earnings

a20252ndquarterreportxd P R E S O R T E D F IR S T -C L A S S M A IL U .S . P O S TA G E P A ID B A T O N R O U G E , L A P E R M IT N O . 9 8 4 Total Assets $4.0Billion Deposits $3.5Billion Locations 31 ATMs 42 $(7.3)Million 2Q 2025 Earnings $(13.5)Million YTD2025 Earnings 128 Consecutive dividends paid and counting 91 Years in Banking Total Loans $2.4 Billion Member FDIC FIRST GUARANTY BANCSHARE

August 25, 2025 8-K

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 Date of Report (Date of earliest event reported): August 21, 2025 FIRST GUARANTY BA

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 Date of Report (Date of earliest event reported): August 21, 2025 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Num

August 18, 2025 EX-99.1

First Guaranty Bancshares, Inc. Announces Second Quarter 2025 Financial Results

EXHIBIT 99.1 AUGUST 18, 2025 NEWS FOR IMMEDIATE RELEASE CONTACT: ERIC J. DOSCH, CFO 985.375.0308 First Guaranty Bancshares, Inc. Announces Second Quarter 2025 Financial Results Hammond, Louisiana, August 18, 2025 – First Guaranty Bancshares, Inc. ("First Guaranty") (NASDAQ: FGBI), the holding company for First Guaranty Bank, announced its unaudited financial results for the second quarter and six

August 18, 2025 8-K/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K/A CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 31, 2025 FIRST GUARANTY BA

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K/A CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 31, 2025 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Num

August 18, 2025 10-Q

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, 2025 ☐ TRANSITION REPORT PURSUANT TO S

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, 2025 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, IN

August 11, 2025 NT 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 12b-25 NOTIFICATION OF LATE FILING

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 12b-25 NOTIFICATION OF LATE FILING (Check one): ☐ Form 10-K ☐ Form 20-F ☐ Form 11-K ☒ Form 10-Q ☐ Form 10-D ☐ Form N-CEN ☐ Form N-CSR For Period Ended: June 30, 2025 ☐ Transition Report on Form 10-K ☐ Transition Report on Form 20-F ☐ Transition Report on Form 11-K ☐ Transition Report on Form 10-Q ☐ Transition Report on Fo

August 1, 2025 EX-99.1

First Guaranty Bancshares, Inc. Announces Second Quarter 2025 Financial Results

EXHIBIT 99.1 JULY 31, 2025 NEWS FOR IMMEDIATE RELEASE CONTACT: ERIC J. DOSCH, CFO 985.375.0308 First Guaranty Bancshares, Inc. Announces Second Quarter 2025 Financial Results Hammond, Louisiana, July 31, 2025 – First Guaranty Bancshares, Inc. ("First Guaranty") (NASDAQ: FGBI), the holding company for First Guaranty Bank, announced its unaudited financial results for the second quarter and six mont

August 1, 2025 8-K

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 Date of Report (Date of earliest event reported): July 31, 2025 FIRST GUARANTY BANC

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 Date of Report (Date of earliest event reported): July 31, 2025 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Numbe

July 21, 2025 8-K

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 Date of Report (Date of earliest event reported): July 17, 2025 FIRST GUARANTY BANC

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 Date of Report (Date of earliest event reported): July 17, 2025 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Numbe

July 15, 2025 8-K/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K/A CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 30, 2025 FIRST GUARANTY BA

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K/A CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 30, 2025 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Num

July 7, 2025 8-K

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 Date of Report (Date of earliest event reported): June 30, 2025 FIRST GUARANTY BANC

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 Date of Report (Date of earliest event reported): June 30, 2025 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Numbe

June 18, 2025 EX-10.1

d as of June 16, 2025, by and between First Gua

EXHIBIT 10.1 EXCHANGE AGREEMENT by and between FIRST GUARANTY BANKSHARES, INC. AND EDGAR RAY SMITH III Dated as of June 16, 2025 TABLE OF CONTENTS ARTICLE 1 DEFINITIONS .................................................................................................................... 1 1.1 Definitions ................................................................................................

June 18, 2025 EX-16.1

EX-16.1

EXHIBIT 16.1 June 18, 2025 Securities and Exchange Commission 100 F Street, N.E. Washington, D.C. 20549 Ladies and Gentleman: We have read the statements made by of First Guaranty Bancshares, Inc. under Item 4.01 of its Current Report on Form 8-K, dated June 18, 2025, and are in agreement with the statements concerning our firm contained within such Item 4.01. Respectfully submitted, /s/ GRIFFITH,

June 18, 2025 8-K

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 Date of Report (Date of earliest event reported): June 16, 2025 FIRST GUARANTY BANC

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 Date of Report (Date of earliest event reported): June 16, 2025 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Numbe

June 18, 2025 8-K

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 Date of Report (Date of earliest event reported): June 13, 2025 FIRST GUARANTY BANC

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 Date of Report (Date of earliest event reported): June 13, 2025 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Numbe

June 9, 2025 EX-10.2

First Amendment to the First Guaranty Bancshares, Inc. Floating Rate Subordinated Note due March 28, 2034, dated as of June 4, 2025, by and between First Guaranty Bancshares, Inc. and Smith & Tate Investment, L.L.C.

EXHIBIT 10.2 FIRST AMENDMENT to THE FIRST GUARANTY BANCSHARES, INC. FLOATING RATE SUBORDINATED NOTE DUE MARCH 28, 2034 This FIRST Amendment to THE FIRST GUARANTY BANCSHARES, INC. FLOATING RATE SUBORDINATED NOTE DUE mARCH 28, 2034 (this “Amendment”) is made and entered into in respect of that certain First Guaranty Bancshares, Inc. Floating Rate Subordinated Note due March 28, 2034 (the “Subordinat

June 9, 2025 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits

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 Date of Report (Date of earliest event reported): June 4, 2025 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Number

June 9, 2025 EX-10.1

First Amendment to the Promissory Note, date as of June 4, 2025, by and between First Guaranty Bancshares, Inc. and Smith & Tate Investment, L.L.C. (15).

EXHIBIT 10.1 FIRST AMENDMENT TO THE PROMISSORY NOTE This FIRST Amendment to THE PROMISSORY NOTE (this “Amendment”) is made and entered into in respect of that certain Promissory Note, dated October 5, 2023 (the “Note”), by and between First Guaranty Bancshares, Inc. (the “Company”) and Smith & Tate Investment, L.L.C. (the “Noteholder”), as successor to Burke & Herbert Bank & Trust Company, as succ

May 20, 2025 8-K

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 Date of Report (Date of earliest event reported): May 15, 2025 FIRST GUARANTY BANCS

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 Date of Report (Date of earliest event reported): May 15, 2025 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Number

May 20, 2025 8-K

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 Date of Report (Date of earliest event reported): May 15, 2025 FIRST GUARANTY BANCS

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 Date of Report (Date of earliest event reported): May 15, 2025 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Number

May 12, 2025 10-Q

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, 2025 ☐ TRANSITION REPORT PURSUANT TO

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, 2025 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, I

May 12, 2025 8-K

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 Date of Report (Date of earliest event reported): May 12, 2025 FIRST GUARANTY BANCS

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 Date of Report (Date of earliest event reported): May 12, 2025 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Number

May 12, 2025 EX-99.1

Total Assets $3.8 Billion Deposits $3.3 Billion Locations 31 ATMs 42 1Q 2025 Earnings (unaudited) 127 Consecutive dividends paid and counting 91 Years in Banking Total Loans $2.5 Billion Have Questions? Vanessa Drew | [email protected] NASDAQ

Total Assets $3.8 Billion Deposits $3.3 Billion Locations 31 ATMs 42 1Q 2025 Earnings (unaudited) 127 Consecutive dividends paid and counting 91 Years in Banking Total Loans $2.5 Billion Have Questions? Vanessa Drew | [email protected] NASDAQ Symbol: FGBI We’re Social: FI R ST G UA R A N TY B A N CS H A R ES , I N C. Po st O ffi ce B ox 2 00 9 H am m on d, L ou is ia na 7 04 04 -2 00 9 PR

April 29, 2025 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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 Date of Report (Date of earliest event reported): April 29, 2025 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Numb

April 29, 2025 EX-99.1

First Guaranty Bancshares, Inc. Announces First Quarter 2025 Financial Results

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 mo

April 23, 2025 ARS

ARS

9 Decades of Commitment to Customer Service 1 2024 FIRST GUARANTY BANCSHARES, INC.

April 21, 2025 8-K

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 Date of Report (Date of earliest event reported): April 17, 2025 FIRST GUARANTY BAN

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 Date of Report (Date of earliest event reported): April 17, 2025 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Numb

April 18, 2025 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. __ )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitted by Rule 14a 6(e)(2)) x Defin

March 27, 2025 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

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 Date of Report (Date of earliest event reported): March 20, 2025 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Numb

March 17, 2025 EX-19.1

First Guaranty Bancshares, Inc. Insider Trading Policy

exhibit191f06insidertrad Approved: January 16, 2025 Page 1 FIRST GUARANTY BANCSHARES, INC.

March 17, 2025 10-K

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 ☐ TRANSITION REPORT PURSUANT TO SECTI

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 BANCSHAR

March 17, 2025 EX-97.1

Clawback policy

EXHIBIT 97.1 FIRST GUARANTY BANCSHARES, INC. POLICY FOR THE RECOVERY OF ERRONEOUSLY AWARDED COMPENSATION A.OVERVIEW In accordance with the applicable rules of the Nasdaq Stock Market (the “Nasdaq Rules”), Section 10D and Rule 10D-1 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), the Board of First Guaranty Bancshares, Inc. (the “Company”) has adopted this Policy (the “Poli

March 17, 2025 8-K

Other Events

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 Date of Report (Date of earliest event reported): March 13, 2025 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Numb

February 5, 2025 EX-99.1

FI R ST G UA R A N TY B A N CS H A R ES , I N C. Po st O ffi ce B ox 2 00 9 H am m on d, L ou is ia na 7 04 04 -2 00 9 PR ES O R TE D FI R ST -C LA SS M A IL U. S. P O ST AG E PA ID B AT O N R O UG E, L A PE R M IT N O . 9 84 FIRST GUARANTY BANCSHARE

FI R ST G UA R A N TY B A N CS H A R ES , I N C. Po st O ffi ce B ox 2 00 9 H am m on d, L ou is ia na 7 04 04 -2 00 9 PR ES O R TE D FI R ST -C LA SS M A IL U. S. P O ST AG E PA ID B AT O N R O UG E, L A PE R M IT N O . 9 84 FIRST GUARANTY BANCSHARES, INC. 4th Quarter Report fgb.net | 2024 At A Glance (unaudited) Total Assets $4.0 Billion Deposits $3.5 Billion Locations 35 ATMs 54 $1.0 Million 4Q

February 5, 2025 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

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 Date of Report (Date of earliest event reported): February 5, 2025 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Nu

February 5, 2025 EX-99.1

Financial Data as of Fourth Quarter 2024 CERTAIN IMPORTANT INFORMATION CAUTION REGARDING FORWARD LOOKING STATEMENTS This presentation contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and

fgbi4thqtr2024investorpr Financial Data as of Fourth Quarter 2024 CERTAIN IMPORTANT INFORMATION CAUTION REGARDING FORWARD LOOKING STATEMENTS This presentation contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended with respect to the financial condition, liquidity, results of operations, and future performance of the business of First Guaranty Bancshares, Inc.

February 5, 2025 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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 Date of Report (Date of earliest event reported): February 5, 2025 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Nu

January 30, 2025 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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 Date of Report (Date of earliest event reported): January 30, 2025 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Nu

January 30, 2025 EX-99.1

First Guaranty Bancshares, Inc. Announces Fourth Quarter and Fiscal Year 2024 Results

EXHIBIT 99.1 January 30, 2025 NEWS FOR IMMEDIATE RELEASE CONTACT: ERIC J. DOSCH, CFO 985.375.0308 First Guaranty Bancshares, Inc. Announces Fourth Quarter and Fiscal Year 2024 Results Hammond, Louisiana, January 30, 2025 – First Guaranty Bancshares, Inc. ("First Guaranty") (NASDAQ: FGBI), the holding company for First Guaranty Bank, announced its unaudited financial results for the quarter and yea

January 21, 2025 8-K

Other Events

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 Date of Report (Date of earliest event reported): January 16, 2025 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Nu

December 26, 2024 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

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 Date of Report (Date of earliest event reported): December 19, 2024 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File N

December 17, 2024 8-K

Other Events

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 Date of Report (Date of earliest event reported): December 16, 2024 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File N

November 12, 2024 10-Q

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 ☐ TRANSITION REPORT PURSUANT

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 BANCSHARE

November 8, 2024 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

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 Date of Report (Date of earliest event reported): November 8, 2024 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Nu

November 8, 2024 EX-99.1

Financial Data as of Third Quarter 2024 CERTAIN IMPORTANT INFORMATION CAUTION REGARDING FORWARD LOOKING STATEMENTS This presentation contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and

Financial Data as of Third Quarter 2024 CERTAIN IMPORTANT INFORMATION CAUTION REGARDING FORWARD LOOKING STATEMENTS This presentation contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended with respect to the financial condition, liquidity, results of operations, and future performance of the business of First Guaranty Bancshares, Inc.

October 30, 2024 EX-99.1

FI R ST G UA R A N TY B A N CS H A R ES , I N C. Po st O ffi ce B ox 2 00 9 H am m on d, L ou is ia na 7 04 04 -2 00 9 PR ES O R TE D FI R ST -C LA SS M A IL U. S. P O ST AG E PA ID B AT O N R O UG E, L A PE R M IT N O . 9 84 FIRST GUARANTY BANCSHARE

a20243rdquarterreport FI R ST G UA R A N TY B A N CS H A R ES , I N C. Po st O ffi ce B ox 2 00 9 H am m on d, L ou is ia na 7 04 04 -2 00 9 PR ES O R TE D FI R ST -C LA SS M A IL U. S. P O ST AG E PA ID B AT O N R O UG E, L A PE R M IT N O . 9 84 FIRST GUARANTY BANCSHARES, INC. 3rd Quarter Report fgb.net | 2024 At A Glance (unaudited) Total Assets $3.9 Billion Deposits $3.4 Billion Locations 35 A

October 30, 2024 8-K

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 Date of Report (Date of earliest event reported): October 30, 2024 FIRST GUARANTY B

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 Date of Report (Date of earliest event reported): October 30, 2024 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Nu

October 30, 2024 8-K

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 Date of Report (Date of earliest event reported): October 30, 2024 FIRST GUARANTY B

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 Date of Report (Date of earliest event reported): October 30, 2024 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Nu

October 30, 2024 EX-99.1

First Guaranty Bancshares, Inc. Announces Third Quarter 2024 Financial Results

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

October 21, 2024 8-K

Other Events

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 Date of Report (Date of earliest event reported): October 17, 2024 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Nu

September 30, 2024 EX-99.1

NASDAQ: FGBI 400 East Thomas St., Hammond, LA 70401 888.375.3093 fgb.netFIRST GUARANTY BANCSHARES, INC. September 30, 2024 Dear Shareholders, First Guaranty initiated a change to its business strategy on July 23, 2024. Our new strategy includes slowi

NASDAQ: FGBI 400 East Thomas St., Hammond, LA 70401 888.375.3093 fgb.netFIRST GUARANTY BANCSHARES, INC. September 30, 2024 Dear Shareholders, First Guaranty initiated a change to its business strategy on July 23, 2024. Our new strategy includes slowing the trajectory of asset growth, utilizing more automation with leaner staff, and further increasing our capital position. First Guaranty is making

September 30, 2024 8-K

Financial Statements and Exhibits, Other Events

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 Date of Report (Date of earliest event reported): September 30, 2024 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File

August 19, 2024 8-K

Other Events

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 Date of Report (Date of earliest event reported): August 15, 2024 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Num

August 9, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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 Date of Report (Date of earliest event reported): August 9, 2024 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Numb

August 9, 2024 10-Q

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 ☐ TRANSITION REPORT PURSUANT TO S

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 ☐ 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, IN

August 9, 2024 EX-99.1

FI R ST G UA R A N TY B A N CS H A R ES , I N C. Po st O ffi ce B ox 2 00 9 H am m on d, L ou is ia na 7 04 04 -2 00 9 PR ES O R TE D FI R ST -C LA SS M A IL U. S. P O ST AG E PA ID B AT O N R O UG E, L A PE R M IT N O . 9 84 FIRST GUARANTY BANCSHARE

FI R ST G UA R A N TY B A N CS H A R ES , I N C. Po st O ffi ce B ox 2 00 9 H am m on d, L ou is ia na 7 04 04 -2 00 9 PR ES O R TE D FI R ST -C LA SS M A IL U. S. P O ST AG E PA ID B AT O N R O UG E, L A PE R M IT N O . 9 84 FIRST GUARANTY BANCSHARES, INC. 2nd Quarter Report fgb.net | 2024 At A Glance (unaudited) Total Assets $3.6 Billion Deposits $3.0 Billion Locations 35 ATMs 50 $7.2 Million 2Q

July 23, 2024 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

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 Date of Report (Date of earliest event reported): July 23, 2024 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Numbe

July 23, 2024 EX-99.1

First Guaranty Bancshares, Inc. Announces Key Developments and Second Quarter 2024 Financial Results

EXHIBIT 99.1 JULY 23, 2024 NEWS FOR IMMEDIATE RELEASE CONTACT: ERIC J. DOSCH, CFO 985.375.0308 First Guaranty Bancshares, Inc. Announces Key Developments and Second Quarter 2024 Financial Results Hammond, Louisiana, July 23, 2024 – First Guaranty Bancshares, Inc. ("First Guaranty") (NASDAQ: FGBI), the holding company for First Guaranty Bank, announced its key developments and unaudited financial r

July 23, 2024 EX-99.2

Financial Data as of Second Quarter 2024 2 CERTAIN IMPORTANT INFORMATION CAUTION REGARDING FORWARD LOOKING STATEMENTS This presentation contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, a

Financial Data as of Second Quarter 2024 2 CERTAIN IMPORTANT INFORMATION CAUTION REGARDING FORWARD LOOKING STATEMENTS This presentation contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended with respect to the financial condition, liquidity, results of operations, and future performance of the business of First Guaranty Bancshares, Inc.

July 22, 2024 8-K

Other Events

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 Date of Report (Date of earliest event reported): July 18, 2024 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Numbe

July 1, 2024 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits

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 Date of Report (Date of earliest event reported): June 28, 2024 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Numbe

July 1, 2024 EX-10.1

Lease Agreements, dated June 28, 2024, by and between First Guaranty Bank and FGB Partners, L.L.C. (18)

1 LEASE AGREEMENT BY: FGB PARTNERS, LLC UNTO: FIRST GUARANTY BANK FGB PARTNERS, LLC (referred to as Landlord), a Louisiana limited liability company, with a mailing address of 11239 Highway 16, Amite, Louisiana 70422, appearing herein through its duly authorized Member/Manager, William K.

June 14, 2024 8-K

Other Events

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 Date of Report (Date of earliest event reported): June 14, 2024 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Numbe

June 4, 2024 EX-99.1

FIRST GUARANTY BANCSHARES, INC APPOINTS MINEER AS PRESIDENT AND CEO

EXHIBIT 99.1 For Immediate Release Contact: Desiree Simmons, Chief Administrative Officer First Guaranty Bank (985) 375-0473/[email protected] FIRST GUARANTY BANCSHARES, INC APPOINTS MINEER AS PRESIDENT AND CEO Hammond, LA, June 3, 2024 – First Guaranty Bancshares, Inc. announced Michael Mineer has been appointed as First Guaranty Bancshares, Inc. and First Guaranty Bank’s President and CEO. He wi

June 4, 2024 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

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 Date of Report (Date of earliest event reported): May 28, 2024 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Number

May 29, 2024 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

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 Date of Report (Date of earliest event reported): May 28, 2024 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Number

May 29, 2024 EX-99.1

FIRST GUARANTY BANCSHARES, INC ANNOUNCES CEO RETIREMENT

EXHIBIT 99.1 For Immediate Release Contact: Desiree Simmons, Chief Administrative Officer First Guaranty Bank (985) 375-0473/[email protected] FIRST GUARANTY BANCSHARES, INC ANNOUNCES CEO RETIREMENT Hammond, LA, May 29, 2024 – First Guaranty Bancshares, Inc. announced today that Alton Lewis will retire from his role as President and Chief Executive Officer of First Guaranty Bancshares, Inc. and Fi

May 17, 2024 8-K

Submission of Matters to a Vote of Security Holders

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 Date of Report (Date of earliest event reported): May 16, 2024 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Number

May 10, 2024 10-Q

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 ☐ TRANSITION REPORT PURSUANT TO

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, I

May 10, 2024 8-K

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 Date of Report (Date of earliest event reported): May 10, 2024 FIRST GUARANTY BANCS

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 Date of Report (Date of earliest event reported): May 10, 2024 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Number

May 10, 2024 EX-99.1

Total Assets $3.6 Billion Deposits $3.1 Billion Locations 35 ATMs 49 $2.3 Million 1Q 2024 Earnings (unaudited) 123 Consecutive dividends paid and counting 90 Years in Banking Total Loans $2.8 Billion Have Questions? Vanessa Drew | InvestorRelations@f

a20241stxquarterreportx Total Assets $3.6 Billion Deposits $3.1 Billion Locations 35 ATMs 49 $2.3 Million 1Q 2024 Earnings (unaudited) 123 Consecutive dividends paid and counting 90 Years in Banking Total Loans $2.8 Billion Have Questions? Vanessa Drew | [email protected] NASDAQ Symbol: FGBI We’re Social: FI R ST G UA R A N TY B A N CS H A R ES , I N C. Po st O ffi ce B ox 2 00 9 H am m on

April 29, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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 Date of Report (Date of earliest event reported): April 29, 2024 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Numb

April 29, 2024 EX-99.1

Financial Data as of First Quarter 2024 2 CERTAIN IMPORTANT INFORMATION CAUTION REGARDING FORWARD LOOKING STATEMENTS This presentation contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, an

Financial Data as of First Quarter 2024 2 CERTAIN IMPORTANT INFORMATION CAUTION REGARDING FORWARD LOOKING STATEMENTS This presentation contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended with respect to the financial condition, liquidity, results of operations, and future performance of the business of First Guaranty Bancshares, Inc.

April 29, 2024 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

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 Date of Report (Date of earliest event reported): April 29, 2024 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Numb

April 29, 2024 EX-99.1

FIRST GUARANTY BANCSHARES, INC. AND SUBSIDIARY CONSOLIDATED BALANCE SHEETS (unaudited) (in thousands, except share data) March 31, 2024 December 31, 2023 Assets Cash and cash equivalents: Cash and due from banks $ 331,592 $ 286,114 Federal funds sold

EXHIBIT 99.1 FIRST GUARANTY BANCSHARES, INC. AND SUBSIDIARY CONSOLIDATED BALANCE SHEETS (unaudited) (in thousands, except share data) March 31, 2024 December 31, 2023 Assets Cash and cash equivalents: Cash and due from banks $ 331,592 $ 286,114 Federal funds sold 465 341 Cash and cash equivalents 332,057 286,455 Investment securities: Available for sale, at fair value 37,752 83,485 Held to maturit

April 22, 2024 8-K

Financial Statements and Exhibits, Other Events

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 Date of Report (Date of earliest event reported): April 22, 2024 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Numb

April 22, 2024 EX-99.1

FOR IMMEDIATE RELEASE CONTACT: Alton Lewis, CEO First Guaranty Bank (985) 375-0350 First Guaranty Bank Bridgeport, WV Branch Officially Opens Hammond, LA, April 22, 2024 – The First Guaranty Bank Bridgeport, West Virginia branch is officially open in

FOR IMMEDIATE RELEASE CONTACT: Alton Lewis, CEO First Guaranty Bank (985) 375-0350 First Guaranty Bank Bridgeport, WV Branch Officially Opens Hammond, LA, April 22, 2024 – The First Guaranty Bank Bridgeport, West Virginia branch is officially open in its new location at 1000 Jerry Dove Dr in the Market Place business complex in Bridgeport.

April 22, 2024 8-K

Other Events

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 Date of Report (Date of earliest event reported): April 18, 2024 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Numb

April 17, 2024 ARS

ARS

ANNUAL REPORT 2023 2023 FIRST GUARANTY BANCSHARES, INC. ANNUAL REPORT FIRST GUARANTY BANCSHARES, INC. FORWARDFGB is a resilient community bank. FGB is a balance-sheet focused, strong fortress bank. FGB is moving FORWARD 1Book Value Growth Per One 1993 Share [1] (per common share) First Guaranty has paid $105,190,000 in Cash Dividends to common shareholders since 1993. Book Value per one 1993 share

April 12, 2024 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. __ )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitted by Rule 14a 6(e)(2)) x Defin

April 3, 2024 EX-4.1

Subordinated Note, dated as of March 28, 2024, by and between First Guaranty Bancshares, Inc. and Smith & Tate Investments L.L.C. (17)

Exhibit 4.1 SUBORDINATED NOTE CERTIFICATE FIRST GUARANTY BANCSHARES, INC. FLOATING RATE SUBORDINATED NOTE DUE MARCH 28, 2034 THE INDEBTEDNESS EVIDENCED BY THIS SUBORDINATED NOTE IS SUBORDINATED AND JUNIOR IN RIGHT OF PAYMENT TO SENIOR INDEBTNESS (AS DEFINED IN SECTION 3 OF THIS SUBORDINATED NOTE) OF FIRST GUARANTY BANCSHARES, INC. (THE “COMPANY”), INCLUDING OBLIGATIONS OF THE COMPANY TO ITS GENERA

April 3, 2024 EX-10.1

Exhibit 10.1

Exhibit 10.1 SUBORDINATED NOTE PURCHASE AGREEMENT This SUBORDINATED NOTE PURCHASE AGREEMENT (this “Agreement”) is dated as of March 28, 2024, and is made by and among First Guaranty Bancshares, Inc., a Louisiana corporation (“Company”), and the purchaser of the Subordinated Note identified on the signature pages hereto (the “Purchaser”). RECITALS WHEREAS, Company has requested that the Purchaser p

April 3, 2024 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

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 Date of Report (Date of earliest event reported): March 28, 2024 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Numb

April 3, 2024 8-K

Financial Statements and Exhibits, Other Events

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 Date of Report (Date of earliest event reported): April 1, 2024 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Numbe

April 3, 2024 EX-99.1

Exhibit 99.1

March 15, 2024 EX-97.1

Clawback policy

EXHIBIT 97.1 FIRST GUARANTY BANCSHARES, INC. POLICY FOR THE RECOVERY OF ERRONEOUSLY AWARDED COMPENSATION A.OVERVIEW In accordance with the applicable rules of the Nasdaq Stock Market (the “Nasdaq Rules”), Section 10D and Rule 10D-1 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), the Board of First Guaranty Bancshares, Inc. (the “Company”) has adopted this Policy (the “Poli

March 15, 2024 10-K

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 ☐ TRANSITION REPORT PURSUANT TO SECTI

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 BANCSHAR

February 21, 2024 8-K

Other Events

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 Date of Report (Date of earliest event reported): February 15, 2024 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File N

February 14, 2024 SC 13D/A

FGBI / First Guaranty Bancshares, Inc. / Hood William K - SCHEDULE 13D/A Activist Investment

SC 13D/A 1 whood20240214csc13da.htm SCHEDULE 13D/A SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 4)* First Guaranty Bancshares, Inc. (Name of Issuer) Common Stock, $1.00 par value per share (Title of Class of Securities) 32043P106 (CUSIP Number) William K. Hood 11239 Highway 16 Amite, LA 70422 (985) 748-7118 (Name, A

February 14, 2024 SC 13D/A

FGBI / First Guaranty Bancshares, Inc. / Smith Edgar R. III - SCHEDULE 13D/A Activist Investment

SC 13D/A 1 esmith20240214csc13da.htm SCHEDULE 13D/A SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 5)* First Guaranty Bancshares, Inc. (Name of Issuer) Common Stock, $1.00 par value per share (Title of Class of Securities) 32043P106 (CUSIP Number) Edgar R. Smith III 63399 Highway 51 North Roseland, LA 70456 (985) 748-

February 14, 2024 SC 13D/A

FGBI / First Guaranty Bancshares, Inc. / Smith Edgar R. III - SCHEDULE 13D/A Activist Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 4)* First Guaranty Bancshares, Inc. (Name of Issuer) Common Stock, $1.00 par value per share (Title of Class of Securities) 32043P106 (CUSIP Number) Edgar R. Smith III 63399 Highway 51 North Roseland, LA 70456 (985) 748-6572 (Name, Address and Telephone Number of Person A

February 14, 2024 SC 13D/A

FGBI / First Guaranty Bancshares, Inc. / REYNOLDS MARSHALL T - SCHEDULE 13D/A Activist Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 1)* First Guaranty Bancshares, Inc. (Name of Issuer) Common Stock, $1.00 par value per share (Title of Class of Securities) 32043P106 (CUSIP Number) Marshall T. Reynolds 2450-90 First Avenue Huntington, West Virginia 25704 (304) 528-2791 (Name, Address and Telephone Numbe

February 14, 2024 SC 13D/A

FGBI / First Guaranty Bancshares, Inc. / Hood William K - SCHEDULE 13D/A Activist Investment

SC 13D/A 1 whood20240214sc13da.htm SCHEDULE 13D/A SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 3)* First Guaranty Bancshares, Inc. (Name of Issuer) Common Stock, $1.00 par value per share (Title of Class of Securities) 32043P106 (CUSIP Number) William K. Hood 11239 Highway 16 Amite, LA 70422 (985) 748-7118 (Name, Ad

February 14, 2024 SC 13G

FGBI / First Guaranty Bancshares, Inc. / REYNOLDS DOUGLAS V - SCHEDULE 13G Passive Investment

SC 13G 1 dreynolds20240214sc13g.htm SCHEDULE 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 First Guaranty Bancshares, Inc. (Name of Issuer) Common Stock, par value $1.00 per share (Title of Class of Securities) 32043P106 (CUSIP Number) December 31, 2023 (Date of Event Which Requires Filing of this Statement) Check

February 13, 2024 8-K

Financial Statements and Exhibits, Other Events

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 Date of Report (Date of earliest event reported): February 13, 2024 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File N

February 13, 2024 EX-99.1

Exhibit 99.1

February 9, 2024 EX-99.1

FIRST GUARANTY BANCSHARES, INC. FI R ST G UA R A N TY B A N CS H A R ES , I N C. Po st O ffi ce B ox 2 00 9 H am m on d, L ou is ia na 7 04 04 -2 00 9 PR ES O R TE D FI R ST -C LA SS M A IL U. S. P O ST AG E PA ID B AT O N R O UG E, L A PE R M IT N O

FIRST GUARANTY BANCSHARES, INC. FI R ST G UA R A N TY B A N CS H A R ES , I N C. Po st O ffi ce B ox 2 00 9 H am m on d, L ou is ia na 7 04 04 -2 00 9 PR ES O R TE D FI R ST -C LA SS M A IL U. S. P O ST AG E PA ID B AT O N R O UG E, L A PE R M IT N O . 9 84 At A Glance (unaudited) Bank Officers Total Assets $3.6 Billion Deposits $3.0 Billion 4th Quarter Report fgb.net | Locations 36 ATMs 49 $1.3 M

February 9, 2024 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

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 Date of Report (Date of earliest event reported): February 9, 2024 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Nu

February 9, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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 Date of Report (Date of earliest event reported): February 9, 2024 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Nu

February 9, 2024 EX-99.1

MARCH 2020 INVESTOR PRESENTATION Financial Data as of: Fourth Quarter 2023 NASDAQ: FGBI www.fgb.net 2 CERTAIN IMPORTANT INFORMATION CAUTION REGARDING FORWARD LOOKING STATEMENTS This presentation contains forward-looking statements within the meaning

MARCH 2020 INVESTOR PRESENTATION Financial Data as of: Fourth Quarter 2023 NASDAQ: FGBI www.

February 5, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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 Date of Report (Date of earliest event reported): February 05, 2024 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File N

February 5, 2024 EX-99.1

First Guaranty Bancshares, Inc. Announces Fourth Quarter 2023 Results

EXHIBIT 99.1 February 5, 2024 NEWS FOR IMMEDIATE RELEASE CONTACT: ERIC J. DOSCH, CFO 985.375.0308 First Guaranty Bancshares, Inc. Announces Fourth Quarter 2023 Results Hammond, Louisiana, February 5, 2024 – First Guaranty Bancshares, Inc. ("First Guaranty") (NASDAQ: FGBI), the holding company for First Guaranty Bank, announced its unaudited financial results for the quarter and year ending Decembe

January 22, 2024 8-K

Other Events

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 Date of Report (Date of earliest event reported): January 18, 2024 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Nu

January 16, 2024 LETTER

LETTER

United States securities and exchange commission logo January 16, 2024 Eric J. Dosch Chief Financial Officer First Guaranty Bancshares, Inc. 400 East Thomas Street Hammond, LA 70401 Re: First Guaranty Bancshares, Inc. Form 10-K for Fiscal Year Ended December 31, 2022 File No. 001-37621 Dear Eric J. Dosch: We have completed our review of your filing. We remind you that the company and its managemen

January 2, 2024 EX-99.1

First Guaranty Bancshares, Inc. Letter to Shareholders

EXHIBIT 99.1 December 29, 2023 First Guaranty Bancshares, Inc. Letter to Shareholders Dear Shareholders, With this letter you are receiving your 122nd consecutive quarterly cash dividend. That is impressive. It is more impressive when you consider the financial times we have gone through in the last year. In the fourth quarter of 2023, First Guaranty continued to grow. Assets as of the end of the

January 2, 2024 8-K

Financial Statements and Exhibits, Other Events

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 Date of Report (Date of earliest event reported): December 29, 2023 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File N

December 28, 2023 CORRESP

FIRST GUARANTY BANCSHARES, INC.

FIRST GUARANTY BANCSHARES, INC. December 28, 2023 VIA EDGAR Securities and Exchange Commission Division of Corporate Finance 100 F Street, N.E. Washington, D.C. 20549 Re: First Guaranty Bancshares, Inc. Form 10-K for Fiscal Year Ended December 31, 2022 File No. 001-37621 Ms. Garrett and Mr. Schroeder: First Guaranty Bancshares, Inc. (“First Guaranty”) is providing the following response to the com

December 26, 2023 8-K

Unregistered Sales of Equity Securities

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 Date of Report (Date of earliest event reported): December 19, 2023 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File N

December 21, 2023 LETTER

LETTER

United States securities and exchange commission logo December 21, 2023 Eric J. Dosch Chief Financial Officer First Guaranty Bancshares, Inc. 400 East Thomas Street Hammond, LA 70401 Re: First Guaranty Bancshares, Inc. Form 10-K for Fiscal Year Ended December 31, 2022 File No. 001-37621 Dear Eric J. Dosch: We have limited our review of your filing to the financial statements and related disclosure

November 21, 2023 8-K

Other Events

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 Date of Report (Date of earliest event reported): November 16, 2023 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File N

November 9, 2023 10-Q

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, 2023 ☐ TRANSITION REPORT PURSUANT

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, 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 BANCSHARE

October 31, 2023 EX-99.1

FIRST GUARANTY BANCSHARES, INC. FI R ST G UA R A N TY B A N CS H A R ES , I N C. Po st O ffi ce B ox 2 00 9 H am m on d, L ou is ia na 7 04 04 -2 00 9 PR ES O R TE D FI R ST -C LA SS M A IL U. S. P O ST AG E PA ID B AT O N R O UG E, L A PE R M IT N O

FIRST GUARANTY BANCSHARES, INC. FI R ST G UA R A N TY B A N CS H A R ES , I N C. Po st O ffi ce B ox 2 00 9 H am m on d, L ou is ia na 7 04 04 -2 00 9 PR ES O R TE D FI R ST -C LA SS M A IL U. S. P O ST AG E PA ID B AT O N R O UG E, L A PE R M IT N O . 9 84 At A Glance (unaudited) Bank Officers Total Assets $3.4 Billion Deposits $2.8 Billion 3rd Quarter Report fgb.net | Locations 36 ATMs 49 $1.8 M

October 31, 2023 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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 Date of Report (Date of earliest event reported): October 31, 2023 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Nu

October 27, 2023 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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 Date of Report (Date of earliest event reported): October 27, 2023 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Nu

October 27, 2023 EX-99.1

First Guaranty Bancshares, Inc. Announces Third Quarter 2023 Results

EXHIBIT 99.1 OCTOBER 27, 2023 NEWS FOR IMMEDIATE RELEASE CONTACT: ERIC J. DOSCH, CFO 985.375.0308 First Guaranty Bancshares, Inc. Announces Third Quarter 2023 Results Hammond, Louisiana, October 27, 2023 – First Guaranty Bancshares, Inc. ("First Guaranty") (NASDAQ: FGBI), the holding company for First Guaranty Bank, announced its unaudited financial results for the quarter ending September 30, 202

October 27, 2023 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

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 Date of Report (Date of earliest event reported): October 27, 2023 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Nu

October 27, 2023 EX-99.1

MARCH 2020 INVESTOR PRESENTATION Financial Data as of: Third Quarter 2023 NASDAQ: FGBI www.fgb.net 2 CERTAIN IMPORTANT INFORMATION CAUTION REGARDING FORWARD LOOKING STATEMENTS This presentation contains forward-looking statements within the meaning o

MARCH 2020 INVESTOR PRESENTATION Financial Data as of: Third Quarter 2023 NASDAQ: FGBI www.

October 23, 2023 8-K

Other Events

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 Date of Report (Date of earliest event reported): October 19, 2023 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Nu

October 12, 2023 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

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 Date of Report (Date of earliest event reported): October 5, 2023 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Num

October 12, 2023 EX-10.2

Promissory Note (Term Loan) issued to Summit Community Bank, Inc. on October 5, 2023. (14)

Exhibit 10.2 PROMISSORY NOTE $40,312,500.00 Charleston, West Virginia October 5, 2023 FOR VALUE RECEIVED, the undersigned FIRST GUARANTY BANCSHARES, INC., a Louisiana corporation having an address of 400 East Thomas Street, Hammond, Louisiana 70401 (“Borrower”), does hereby promise to pay to the order of SUMMIT COMMUNITY BANK, INC., a West Virginia state banking corporation (“Lender”) at its Charl

October 12, 2023 EX-10.1

Loan Agreement, dated as of October 5, 2023, by and between First Guaranty Bancshares, Inc. and Summit Community Bank, Inc. (

Exhibit 10.1 LOAN AGREEMENT among SUMMIT COMMUNITY BANK, INC. and FIRST GUARANTY BANCSHARES, INC. October 5, 2023 LOAN AGREEMENT THIS LOAN AGREEMENT is made and entered into as of the 5th day of October 2023, by and among SUMMIT COMMUNITY BANK, INC., a West Virginia state banking corporation having an address of 310 North Main Street, Moorefield, West Virginia 26836 (“Lender”), FIRST GUARANTY BANC

October 12, 2023 EX-10.4

Stock Pledge and Security Agreement, dated as of October 5, 2023, by First Guaranty Bancshares, Inc. in favor of Summit Community Bank, Inc. (16)

Exhibit 10.4 STOCK PLEDGE AND SECURITY AGREEMENT THIS STOCK PLEDGE AND SECURITY AGREEMENT (this “Agreement”), dated October 5, 2023, is made by FIRST GUARANTY BANCSHARES, INC., a Louisiana corporation having an address of 400 East Thomas Street, Hammond, Louisiana 70401 (“Pledgor”), in favor of SUMMIT COMMUNITY BANK, INC., a West Virginia state banking corporation having an address of 310 North Ma

October 12, 2023 EX-10.3

Promissory Note (Line of Credit) issued to Summit Community Bank, Inc. on October 5, 2023. (15)

Exhibit 10.3 PROMISSORY NOTE $20,000,000.00 Charleston, West Virginia October 5, 2023 FOR VALUE RECEIVED, the undersigned FIRST GUARANTY BANCSHARES, INC., a Louisiana corporation having an address of 400 East Thomas Street, Hammond, Louisiana 70401 (“Borrower”), does hereby promise to pay to the order of SUMMIT COMMUNITY BANK, INC., a West Virginia state banking corporation (“Lender”) at its Charl

October 2, 2023 8-K

Financial Statements and Exhibits, Other Events

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 Date of Report (Date of earliest event reported): September 29, 2023 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File

October 2, 2023 EX-99.1

First Guaranty Bancshares, Inc. Letter to Shareholders

EXHIBIT 99.1 September 29, 2023 First Guaranty Bancshares, Inc. Letter to Shareholders Dear Shareholders, With this letter you are receiving your 121st consecutive quarterly cash dividend. That makes 30 years. In the third quarter of 2023, First Guaranty has continued its growth. Assets grew to approximately $3,370,000,000 powered by continued growth of the loan portfolio. Deposits also continued

September 1, 2023 SC 13D/A

FGBI / First Guaranty Bancshares Inc / Smith Edgar R. III - SCHEDULE 13D/A Activist Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 3)* First Guaranty Bancshares, Inc. (Name of Issuer) Common Stock, $1.00 par value per share (Title of Class of Securities) 32043P106 (CUSIP Number) Edgar R. Smith III 63399 Highway 51 North Roseland, LA 70456 (985) 748-6572 (Name, Address and Telephone Number of Person A

August 31, 2023 S-8

As filed with the Securities and Exchange Commission on August 31, 2023

As filed with the Securities and Exchange Commission on August 31, 2023 Registration No.

August 31, 2023 EX-FILING FEES

Filing Fee Table

Exhibit 107 Calculation of Filing Fee Tables Form S-8 (Form Type) FIRST GUARANTY BANCSHARES, INC.

August 21, 2023 8-K

Other Events

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 Date of Report (Date of earliest event reported): August 17, 2023 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Num

August 16, 2023 EX-99.1

MARCH 2020 INVESTOR PRESENTATION Financial Data as of: Second Quarter 2023 NASDAQ: FGBI www.fgb.net 2 CERTAIN IMPORTANT INFORMATION CAUTION REGARDING FORWARD LOOKING STATEMENTS This presentation contains forward-looking statements within the meaning

fgbi2ndqtr2023investorpr MARCH 2020 INVESTOR PRESENTATION Financial Data as of: Second Quarter 2023 NASDAQ: FGBI www.

August 16, 2023 8-K

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 Date of Report (Date of earliest event reported): August 16, 2023 FIRST GUARANTY BA

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 Date of Report (Date of earliest event reported): August 16, 2023 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Num

August 9, 2023 EX-99.1

FIRST GUARANTY BANCSHARES, INC. FI R S T G U A R A N TY B A N C S H A R E S , IN C . P o s t O ffi c e B o x 2 0 0 9 H a m m o n d , L o u is ia n a 7 0 4 0 4 -2 0 0 9 P R E S O R T E D F IR S T -C L A S S M A IL U .S . P O S TA G E P A ID B A T O N

a2023secondquarterreport FIRST GUARANTY BANCSHARES, INC. FI R S T G U A R A N TY B A N C S H A R E S , IN C . P o s t O ffi c e B o x 2 0 0 9 H a m m o n d , L o u is ia n a 7 0 4 0 4 -2 0 0 9 P R E S O R T E D F IR S T -C L A S S M A IL U .S . P O S TA G E P A ID B A T O N R O U G E , L A P E R M IT N O . 9 8 4 At A Glance (unaudited) Bank Officers Total Assets $3.2Billion Deposits $2.8Billion 20

August 9, 2023 8-K

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 Date of Report (Date of earliest event reported): August 9, 2023 FIRST GUARANTY BAN

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 Date of Report (Date of earliest event reported): August 9, 2023 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Numb

August 9, 2023 10-Q

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 ☐ TRANSITION REPORT PURSUANT TO S

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, IN

August 8, 2023 EX-99.1

First Guaranty Bancshares, Inc. Announces Second Quarter 2023 Results

EXHIBIT 99.1 AUGUST 8, 2023 NEWS FOR IMMEDIATE RELEASE CONTACT: ERIC J. DOSCH, CFO 985.375.0308 First Guaranty Bancshares, Inc. Announces Second Quarter 2023 Results Hammond, Louisiana, August 8, 2023 – First Guaranty Bancshares, Inc. ("First Guaranty") (NASDAQ: FGBI), the holding company for First Guaranty Bank, announced its unaudited financial results for the quarter ending June 30, 2023. Resil

August 8, 2023 8-K

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 Date of Report (Date of earliest event reported): August 8, 2023 FIRST GUARANTY BAN

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 Date of Report (Date of earliest event reported): August 8, 2023 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Numb

July 27, 2023 RW

First Guaranty Bancshares, Inc. 400 East Thomas Street Hammond, Louisiana

First Guaranty Bancshares, Inc. 400 East Thomas Street Hammond, Louisiana July 27, 2023 VIA EDGAR United States Securities and Exchange Commission Division of Corporate Finance 100 F Street, NE Washington, D.C. 20549-3628 Re: First Guaranty Bancshares, Inc. Request for Withdrawal of Registration Statement on Form S-4 File No. 333-270770 Ladies and Gentlemen: Pursuant to Rule 477 of the Securities

July 24, 2023 8-K

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 Date of Report (Date of earliest event reported): July 20, 2023 FIRST GUARANTY BANC

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 Date of Report (Date of earliest event reported): July 20, 2023 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Numbe

July 10, 2023 EX-99.1

First Guaranty Bancshares, Inc. and Lone Star Bank Mutually Agree to Terminate Merger Agreement as Market Conditions Have Changed since January 6, 2023

EXHIBIT 99.1 JULY 10, 2023 FOR IMMEDIATE RELEASE CONTACT: ALTON LEWIS, CEO AND ERIC DOSCH, CFO 985.375.0350 / 985.375.0308 First Guaranty Bancshares, Inc. and Lone Star Bank Mutually Agree to Terminate Merger Agreement as Market Conditions Have Changed since January 6, 2023 Hammond, Louisiana, July 10, 2023 – First Guaranty Bancshares, Inc. (Nasdaq: FGBI) (“First Guaranty”) and Lone Star Bank (“Lo

July 10, 2023 EX-10.1

Agreement and Release, dated July 10, 2023, by and among First Guaranty Bancshares, Inc., First Guaranty Bank and Lone Star Bank (13)

MUTUAL TERMINATION AGREEMENT AND RELEASE THIS MUTUAL TERMINATION AGREEMENT AND RELEASE (this “Agreement”), is entered into as of July 10, 2023, by and among First Guaranty Bancshares, Inc.

July 10, 2023 8-K

Termination of a Material Definitive Agreement, Financial Statements and Exhibits, Other Events

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 Date of Report (Date of earliest event reported): July 10, 2023 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Numbe

July 5, 2023 EX-99.1

First Guaranty Bancshares, Inc. Letter to Shareholders

EXHIBIT 99.1 June 30, 2023 First Guaranty Bancshares, Inc. Letter to Shareholders Dear Shareholders, 120 consecutive quarterly dividends. That is 30 years of consecutive quarterly dividends. How is that for an investment? It continues. Our loan demand continues to be strong, up slightly from the end of the first quarter 2023. In response to the pressure we are feeling in interest expense, our loan

July 5, 2023 8-K

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 Date of Report (Date of earliest event reported): June 30, 2023 FIRST GUARANTY BANC

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 Date of Report (Date of earliest event reported): June 30, 2023 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Numbe

June 7, 2023 EX-99.1

ADJOURNMENT OF LONE STAR BANK SPECIAL MEETING OF SHAREHOLDERS UNTIL JULY 11, 2023

EXHIBIT 99.1 JUNE 7, 2023 NEWS FOR IMMEDIATE RELEASE CONTACT: ALTON LEWIS, CEO AND ERIC DOSCH, CFO 985.375.0350 / 985.375.0308 ADJOURNMENT OF LONE STAR BANK SPECIAL MEETING OF SHAREHOLDERS UNTIL JULY 11, 2023 HOUSTON, TEXAS, June 7, 2023 – First Guaranty Bancshares, Inc. (Nasdaq: FGBI) (“First Guaranty”) previously filed a proxy statement/prospectus with respect to a special meeting of the shareho

June 7, 2023 8-K

Financial Statements and Exhibits, Other Events

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 Date of Report (Date of earliest event reported): June 7, 2023 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Number

June 5, 2023 SC 13D/A

FGBI / First Guaranty Bancshares Inc / Hood William K - SCHEDULE 13D/A Activist Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 2)* First Guaranty Bancshares, Inc. (Name of Issuer) Common Stock, $1.00 par value per share (Title of Class of Securities) 32043P106 (CUSIP Number) William K. Hood 11239 Highway 16 Amite, LA 70422 (985) 748-7118 (Name, Address and Telephone Number of Person Authorized to

June 2, 2023 SC 13D/A

FGBI / First Guaranty Bancshares Inc / Smith Edgar R. III - SCHEDULE 13D/A Activist Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 2)* First Guaranty Bancshares, Inc. (Name of Issuer) Common Stock, $1.00 par value per share (Title of Class of Securities) 32043P106 (CUSIP Number) Edgar R. Smith III 63399 Highway 51 North Roseland, LA 70456 (985) 748-6572 (Name, Address and Telephone Number of Person A

June 2, 2023 EX-99.1

UNITED STATES OF AMERICA Before the SECURITIES AND EXCHANGE COMMISSION SECURITIES EXCHANGE ACT OF 1934 Release No. 97631 / May 31, 2023 ADMINISTRATIVE PROCEEDING File No. 3-21474 In the Matter of FIRST GUARANTY BANCSHARES, INC., Respondent. ORDER INS

orderinsitutingcease-and UNITED STATES OF AMERICA Before the SECURITIES AND EXCHANGE COMMISSION SECURITIES EXCHANGE ACT OF 1934 Release No.

June 2, 2023 8-K

Financial Statements and Exhibits, Other Events

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 Date of Report (Date of earliest event reported): May 31, 2023 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Number

June 2, 2023 425

Filed by First Guaranty Bancshares, Inc. Pursuant to Rule 425 under the Securities Act of 1933 Subject Company: Lone Star Bank Commission File Number: 001-37621 June 1, 2023 “We have been frustrated by the unfair beating our stock has taken in recent

fgbi425lsb Filed by First Guaranty Bancshares, Inc. Pursuant to Rule 425 under the Securities Act of 1933 Subject Company: Lone Star Bank Commission File Number: 001-37621 June 1, 2023 “We have been frustrated by the unfair beating our stock has taken in recent months, and the completion of the offering with the 100% participation of Directors shows our belief in our Bank, which has been in operat

May 24, 2023 8-K

Regulation FD Disclosure, Unregistered Sales of Equity Securities

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 Date of Report (Date of earliest event reported): May 23, 2023 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Number

May 24, 2023 EX-99.1

FIRST GUARANTY BANCSHARES, INC. ANNOUNCES PRIVATE PLACEMENT

EXHIBIT 99.1 May 23, 2023 NEWS FOR IMMEDIATE RELEASE CONTACT: ALTON LEWIS, CEO AND ERIC DOSCH, CFO 985.375.0350 / 985.375.0308 FIRST GUARANTY BANCSHARES, INC. ANNOUNCES PRIVATE PLACEMENT HAMMOND, LOUISIANA, May 23, 2023 – First Guaranty Bancshares, Inc. (“First Guaranty”) (NASDAQ: FGBI), the holding company for First Guaranty Bank, announced today that it has completed a private placement offering

May 22, 2023 8-K

Other Events

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 Date of Report (Date of earliest event reported): May 18, 2023 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Number

May 19, 2023 8-K

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 Date of Report (Date of earliest event reported): May 18, 2023 FIRST GUARANTY BANCS

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 Date of Report (Date of earliest event reported): May 18, 2023 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Number

May 10, 2023 10-Q

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, 2023 ☐ TRANSITION REPORT PURSUANT TO

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, 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, I

April 28, 2023 424B3

PROXY STATEMENT/PROSPECTUS MERGER PROPOSED—YOUR VOTE IS VERY IMPORTANT

424B3 1 fgbi-424b3042823.htm FORM 424B3 Filed pursuant to Rule 424(b)(3) Registration Statement No. 333-270770 PROXY STATEMENT/PROSPECTUS MERGER PROPOSED—YOUR VOTE IS VERY IMPORTANT To the Shareholders of Lone Star Bank: On January 6, 2023, First Guaranty Bancshares, Inc. (or “First Guaranty”), First Guaranty Bank, First Guaranty’s wholly-owned banking subsidiary and a Louisiana state bank (or “Fi

April 26, 2023 EX-99.1

MARCH 2020 INVESTOR PRESENTATION Financial Data as of: First Quarter 2023 NASDAQ: FGBI www.fgb.net 2 CERTAIN IMPORTANT INFORMATION CAUTION REGARDING FORWARD LOOKING STATEMENTS This presentation contains forward-looking statements within the meaning o

fgbi1stqtr2023investorpr MARCH 2020 INVESTOR PRESENTATION Financial Data as of: First Quarter 2023 NASDAQ: FGBI www.

April 26, 2023 8-K

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 Date of Report (Date of earliest event reported): April 26, 2023 FIRST GUARANTY BAN

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 Date of Report (Date of earliest event reported): April 26, 2023 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Numb

April 26, 2023 8-K

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 Date of Report (Date of earliest event reported): April 26, 2023 FIRST GUARANTY BAN

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 Date of Report (Date of earliest event reported): April 26, 2023 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Numb

April 26, 2023 EX-99.1

2023 1st Quarter Report FIRST GUARANTY BANCSHARES, INC. FI R ST G UA R A N TY B A N CS H A R ES , I N C. Po st O ffi ce B ox 2 00 9 H am m on d, L ou is ia na 7 04 04 -2 00 9 PR ES O R TE D FI R ST -C LA SS M A IL U. S. P O ST AG E PA ID B AT O N R O

a2023firstquarterreport 2023 1st Quarter Report FIRST GUARANTY BANCSHARES, INC. FI R ST G UA R A N TY B A N CS H A R ES , I N C. Po st O ffi ce B ox 2 00 9 H am m on d, L ou is ia na 7 04 04 -2 00 9 PR ES O R TE D FI R ST -C LA SS M A IL U. S. P O ST AG E PA ID B AT O N R O UG E, L A PE R M IT N O . 9 84 Member FDIC Locations 36 ATMs 49 $3.5 Million 1Q2023 Earnings (unaudited) At A Glance (unaudit

April 26, 2023 EX-99.1

First Guaranty Bancshares, Inc. Announces First Quarter 2023 Results

EXHIBIT 99.1 APRIL 26, 2023 NEWS FOR IMMEDIATE RELEASE CONTACT: ERIC J. DOSCH, CFO 985.375.0308 First Guaranty Bancshares, Inc. Announces First Quarter 2023 Results Hammond, Louisiana, April 26, 2023 – First Guaranty Bancshares, Inc. ("First Guaranty") (NASDAQ: FGBI), the holding company for First Guaranty Bank, announced its unaudited financial results for the quarter ending March 31, 2023. Extra

April 26, 2023 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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 Date of Report (Date of earliest event reported): April 26, 2023 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Numb

April 25, 2023 CORRESP

First Guaranty Bancshares, Inc. 400 East Thomas Street Hammond, Louisiana 70401 April 25, 2023

First Guaranty Bancshares, Inc. 400 East Thomas Street Hammond, Louisiana 70401 April 25, 2023 VIA EDGAR Securities and Exchange Commission 100 F Street, NE Washington, D.C. 20549 Re: First Guaranty Bancshares, Inc. Registration Statement on Form S-4 (File No. 333-270770) Request for Acceleration Ladies and Gentlemen: First Guaranty Bancshares, Inc., a Louisiana corporation (the “Registrant”), her

April 24, 2023 EX-99.6

Form of Proxy for holders of shares of common stock of Lone Star Bank

First Guaranty Bancshares, Inc. S-4/A Exhibit 99.6 LONE STAR BANK 2600 south gessner road, suite 100 houston, TEXAS 77063 THIS PROXY IS SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS I hereby appoint Greg Bernica and Jeff Berkley, and either of them, with full power of substitution, to be my attorneys and proxies at the special meeting of shareholders of Lone Star Bank (“Lone Star”) to be held on J

April 24, 2023 8-K

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 Date of Report (Date of earliest event reported): April 20, 2023 FIRST GUARANTY BAN

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 Date of Report (Date of earliest event reported): April 20, 2023 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Numb

April 24, 2023 S-4/A

As filed with the Securities and Exchange Commission on April 24, 2023

As filed with the Securities and Exchange Commission on April 24, 2023 Registration No.

April 24, 2023 EX-99.4

Consent of Performance Trust Capital Partners, LLC.

First Guaranty Bancshares, Inc. S-4/A Exhibit 99.4 April 24, 2023 Consent of Performance Trust Capital Partners, LLC Performance Trust Capital Partners, LLC hereby consents to the inclusion of our opinion letter to the board of directors of Lone Star Bank as Annex E to, and the references to our firm and such opinion in, the proxy statement/prospectus that is part of this Amendment No. 1 to the Re

April 10, 2023 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. __ )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitted by Rule 14a 6(e)(2)) x Defin

April 10, 2023 ARS

ARS

ANNUAL REPORT 2022 2022 FIRST GUARANTY BANCSHARES, INC. ANNUAL REPORT FIRST GUARANTY BANCSHARES, INC.First Guaranty Bancshares Annual Report 2022 1 First Guaranty Bank is the #1 Best Small Bank in the U.S. for the THIRD YEAR IN A ROW We are excited to announce that for the third year in a row, we've been named the Best Small Bank in the U.S. and Louisiana by Newsweek. Newsweek partnered with Lendi

April 6, 2023 EX-99.1

JOINT FILING AGREEMENT

EXHIBIT 99.1 JOINT FILING AGREEMENT The undersigned agree that the foregoing statement on Schedule 13D (including any and all amendments thereto) is being filed with the Securities and Exchange Commission on behalf of each of the undersigned pursuant to Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended, and further agree that this Joint Filing Agreement be included as an Exhibit

April 6, 2023 SC 13D/A

FGBI / First Guaranty Bancshares Inc / Hood William K - SCHEDULE 13D/A Activist Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 1)* First Guaranty Bancshares, Inc. (Name of Issuer) Common Stock, $1.00 par value per share (Title of Class of Securities) 32043P106 (CUSIP Number) William K. Hood 11239 Highway 16 Amite, LA 70422 (985) 748-7118 (Name, Address and Telephone Number of Person Authorized to

March 31, 2023 8-K

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 Date of Report (Date of earliest event reported): March 31, 2023 FIRST GUARANTY BAN

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 Date of Report (Date of earliest event reported): March 31, 2023 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Numb

March 31, 2023 EX-99.1

First Guaranty Bancshares, Inc. Letter to Shareholders

EXHIBIT 99.1 March 31, 2023 First Guaranty Bancshares, Inc. Letter to Shareholders Dear Shareholders, The end of the first quarter of 2023 seems to be bringing brighter skies. Enclosed you will find your dividend check for the first quarter of 2023. This represents the 119th consecutive quarterly dividend issued by First Guaranty Bancshares, Inc. That is strong! The combination of our continued st

March 30, 2023 LETTER

LETTER

United States securities and exchange commission logo March 30, 2023 Alton B. Lewis, Jr. President and Chief Executive Officer First Guaranty Bancshares, Inc. 400 East Hammond Street Hammond, Louisiana 70401 Re: First Guaranty Bancshares, Inc. Registration Statement on Form S-4 Filed March 23, 2023 File No. 333-270770 Dear Alton B. Lewis, Jr.: This is to advise you that we have not reviewed and wi

March 23, 2023 EX-99.5

Consent of Jeff A. Berkley

EX-99.5 8 ex99-5.htm CONSENT OF JEFF A. BERKLEY First Guaranty Bancshares, Inc. S-4 Exhibit 99.5 Consent of Jeff A. Berkley Pursuant to Rule 438 promulgated under the Securities Act of 1933, as amended (the “Securities Act”), I hereby consent to being named in the Registration Statement on Form S-4 (the “Registration Statement”) of First Guaranty Bancshares, Inc., and all amendments and supplement

March 23, 2023 EX-99.4

Consent of Performance Trust Capital Partners, LLC.

First Guaranty Bancshares, Inc. S-4 Exhibit 99.4 March 23, 2023 Consent of Performance Trust Capital Partners, LLC Performance Trust Capital Partners, LLC hereby consents to the inclusion of our opinion letter to the board of directors of Lone Star Bank as Annex E to, and the references to our firm and such opinion in, the proxy statement/prospectus that is part of the Registration Statement on Fo

March 23, 2023 EX-FILING FEES

Filing Fee Table

First Guaranty Bancshares, Inc. S-4 Exhibit 107 Calculation of Filing Fee Tables Form S-4 (Form Type) First Guaranty Bancshares, Inc. (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered and Carry Forward Securities Security Type Security Class Title Fee Calculation or Carry Forward Rule Amount Registered Proposed Maximum Offering Price Per Unit Maximum Aggregate Offeri

March 23, 2023 S-4

Power of Attorney

As filed with the Securities and Exchange Commission on March 23, 2023 Registration No.

March 16, 2023 10-K

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, 2022 ☐ TRANSITION REPORT PURSUANT TO SECTI

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, 2022 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 BANCSHAR

March 16, 2023 EX-4.5

Description of Preferred Stock. (10)

EXHIBIT 4.5 Description of Preferred Stock The following summary contains a description of the general terms of our preferred stock. The rights of the holders of our preferred stock are governed by First Guaranty Bancshares’ restated articles of incorporation, as amended (the “Articles of Incorporation”), and by the Louisiana Business Corporation Act. Series A Preferred Stock We are authorized to

March 16, 2023 EX-4.3

Description of Common Stock. (8)

EXHIBIT 4.3 Description of Common Stock The following summary contains a description of the general terms of our common stock. Each share of common stock has the same relative rights as, and is identical in all respects to, each other share of common stock. The rights of the holders of our common stock are governed by First Guaranty Bancshares’ restated articles of incorporation, as amended (the “

February 21, 2023 SC 13D/A

FGBI / First Guaranty Bancshares Inc / Smith Edgar R. III - SCHEDULE 13D/A Activist Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 1)* First Guaranty Bancshares, Inc. (Name of Issuer) Common Stock, $1.00 par value per share (Title of Class of Securities) 32043P106 (CUSIP Number) Edgar R. Smith III 63399 Highway 51 North Roseland, LA 70456 (985) 748-6572 (Name, Address and Telephone Number of Person A

February 17, 2023 8-K

Other Events

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 Date of Report (Date of earliest event reported): February 16, 2023 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File N

February 16, 2023 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

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 Date of Report (Date of earliest event reported): February 16, 2023 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File N

February 16, 2023 EX-99.1

MARCH 2020 INVESTOR PRESENTATION Financial Data as of: Fourth Quarter 2022 NASDAQ: FGBI www.fgb.net 2 CERTAIN IMPORTANT INFORMATION CAUTION REGARDING FORWARD LOOKING STATEMENTS This presentation contains forward-looking statements within the meaning

MARCH 2020 INVESTOR PRESENTATION Financial Data as of: Fourth Quarter 2022 NASDAQ: FGBI www.

February 14, 2023 EX-99.1

Joint Filing Agreement*

EX-99.1 2 ex475507.htm EXHIBIT 99.1 EXHIBIT 99.1 JOINT FILING AGREEMENT The undersigned agree that the foregoing statement on Schedule 13D (including any and all amendments thereto) is being filed with the Securities and Exchange Commission on behalf of each of the undersigned pursuant to Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended, and further agree that this Joint Filing

February 14, 2023 EX-99.1

Joint Filing Agreement

EX-99.1 2 ex475574.htm EXHIBIT 99.1 EXHIBIT 99.1 JOINT FILING AGREEMENT The undersigned agree that the foregoing statement on Schedule 13D (including any and all amendments thereto) is being filed with the Securities and Exchange Commission on behalf of each of the undersigned pursuant to Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended, and further agree that this Joint Filing

February 14, 2023 SC 13D

FGBI / First Guaranty Bancshares, Inc. / Hood William K - SCHEDULE 13D Activist Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. )* First Guaranty Bancshares, Inc. (Name of Issuer) Common Stock, $1.00 par value per share (Title of Class of Securities) 32043P106 (CUSIP Number) William K. Hood 11239 Highway 16 Amite, LA 70422 (985) 748-7118 (Name, Address and Telephone Number of Person Authorized to

February 14, 2023 EX-99.1

JOINT FILING AGREEMENT

EXHIBIT 99.1 JOINT FILING AGREEMENT The undersigned agree that the foregoing statement on Schedule 13D (including any and all amendments thereto) is being filed with the Securities and Exchange Commission on behalf of each of the undersigned pursuant to Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended, and further agree that this Joint Filing Agreement be included as an Exhibit

February 14, 2023 SC 13G

FGBI / First Guaranty Bancshares, Inc. / REYNOLDS DOUGLAS V - SCHEDULE 13G Passive Investment

SC 13G 1 dreynolds20230213sc13g.htm SCHEDULE 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 First Guaranty Bancshares, Inc. (Name of Issuer) Common Stock, par value $1.00 per share (Title of Class of Securities) 32043P106 (CUSIP Number) December 31, 2022 (Date of Event Which Requires Filing of this Statement) Check

February 14, 2023 SC 13D

FGBI / First Guaranty Bancshares, Inc. / REYNOLDS MARSHALL T - SCHEDULE 13D Activist Investment

SC 13D 1 mreyn20230214sc13d.htm SCHEDULE 13D SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. )* First Guaranty Bancshares, Inc. (Name of Issuer) Common Stock, $1.00 par value per share (Title of Class of Securities) 32043P106 (CUSIP Number) Marshall T. Reynolds 2450-90 First Avenue Huntington, West Virginia 25704 (304)

February 14, 2023 SC 13D

FGBI / First Guaranty Bancshares, Inc. / Smith Edgar R. III - SCHEDULE 13D Activist Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. )* First Guaranty Bancshares, Inc. (Name of Issuer) Common Stock, $1.00 par value per share (Title of Class of Securities) 32043P106 (CUSIP Number) Edgar R. Smith III 63399 Highway 51 North Roseland, LA 70456 (985) 748-6572 (Name, Address and Telephone Number of Person Au

February 1, 2023 EX-99.1

FIRST GUARANTY BANCSHARES, INC. FI R ST G UA R A N TY B A N CS H A R ES , I N C. FI R ST G UA R A N TY B A N CS H A R ES , I N C. Po st O ffi ce B ox 2 00 9 H am m on d, L ou is ia na 7 04 04 -2 00 9 PR ES O R TE D FI R ST -C LA SS M A IL U. S. P O S

FIRST GUARANTY BANCSHARES, INC. FI R ST G UA R A N TY B A N CS H A R ES , I N C. FI R ST G UA R A N TY B A N CS H A R ES , I N C. Po st O ffi ce B ox 2 00 9 H am m on d, L ou is ia na 7 04 04 -2 00 9 PR ES O R TE D FI R ST -C LA SS M A IL U. S. P O ST AG E PA ID B AT O N R O UG E, L A PE R M IT N O . 9 84 At A Glance (unaudited) Bank Officers Total Assets $3.2 Billion Deposits $2.7 Billion *Office

February 1, 2023 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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 Date of Report (Date of earliest event reported): February 1, 2023 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Nu

January 31, 2023 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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 Date of Report (Date of earliest event reported): January 31, 2023 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Nu

January 31, 2023 EX-99.1

First Guaranty Bancshares, Inc. Announces Fourth Quarter 2022 Results

EXHIBIT 99.1 January 31, 2023 NEWS FOR IMMEDIATE RELEASE CONTACT: ERIC J. DOSCH, CFO 985.375.0308 First Guaranty Bancshares, Inc. Announces Fourth Quarter 2022 Results Hammond, Louisiana, January 31, 2023 – First Guaranty Bancshares, Inc. ("First Guaranty") (NASDAQ: FGBI), the holding company for First Guaranty Bank, announced its unaudited financial results for the quarter and year ending Decembe

January 23, 2023 8-K

Other Events

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 Date of Report (Date of earliest event reported): January 19, 2023 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Nu

January 9, 2023 EX-99.1

First Guaranty Bancshares, Inc. and Lone Star Bank: A Match Made in Bluebonnet Heaven

EX-99.1 4 fgbi-ex991lonestarpressrel.htm PRESS RELEASE DATED JANUARY 9, 2023 EXHIBIT 99.1 JANUARY 9, 2023 FOR IMMEDIATE RELEASE CONTACT: ALTON LEWIS, CEO AND ERIC DOSCH, CFO 985.375.0350 / 985.375.0308 First Guaranty Bancshares, Inc. and Lone Star Bank: A Match Made in Bluebonnet Heaven HAMMOND, Louisiana & HOUSTON, Texas, January 9, 2023 – First Guaranty Bancshares, Inc. (Nasdaq: FGBI) – First Gu

January 9, 2023 EX-99.2

FIRST GUARANTY BANK EXPANDS FOOTPRINT IN TEXAS MARKET Copperfield Branch 7630 Highway 6 North Houston, TX 77095 Columbus Branch 1515 Fannin St., Suite D Columbus, TX 78934 Gessner Branch 2600 South Gessner Rd., Suite 100 Houston, TX 77063 Sealy Branc

EX-99.2 5 acquisitionlsbtermsoftr.htm MAP OF EXISTING LOCATIONS FIRST GUARANTY BANK EXPANDS FOOTPRINT IN TEXAS MARKET Copperfield Branch 7630 Highway 6 North Houston, TX 77095 Columbus Branch 1515 Fannin St., Suite D Columbus, TX 78934 Gessner Branch 2600 South Gessner Rd., Suite 100 Houston, TX 77063 Sealy Branch 307 Main Street Sealy, TX 77474

January 9, 2023 8-K

Regulation FD Disclosure, Entry into a Material Definitive Agreement, Financial Statements and Exhibits

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 Date of Report (Date of earliest event reported): January 6, 2023 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Num

January 9, 2023 EX-10.1

Exhibit 10.1

EXECUTION VERSION FORM OF VOTING AGREEMENT THIS VOTING AGREEMENT (this “Agreement”) is dated as of January 6, 2023 by and between the undersigned holder (“Shareholder”) of common stock of Lone Star Bank, a Texas banking association (“Lone Star”), and First Guaranty Bancshares, Inc.

January 9, 2023 EX-2.1

Agreement and Plan of Merger by and among First Guaranty Bancshares, Inc., First Guaranty Bank and Lone Star Bank dated January 6, 2023 (included as Annex A to the proxy statement/prospectus, which forms a part of this registration statement on Form S-4).

EX-2.1 2 fgbi-ex21agreementandplano.htm AGREEMENT AND PLAN OF MERGER EXECUTION VERSION AGREEMENT AND PLAN OF MERGER by and among FIRST GUARANTY BANCSHARES, INC. FIRST GUARANTY BANK AND LONE STAR BANK Dated as of January 6, 2023 TABLE OF CONTENTS Article I THE MERGER 2 1.01 The Merger. 2 1.02 Articles, Certificate of Formation and Bylaws; Officers and Directors. 2 1.03 Effective Time; Closing. 3 1.

December 30, 2022 8-K

Financial Statements and Exhibits, Other Events

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 Date of Report (Date of earliest event reported): December 30, 2022 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File N

December 30, 2022 EX-99.1

First Guaranty Bancshares, Inc. Letter to Shareholders

EX-99.1 2 fgbi-ex991lettertosharehol.htm LETTER TO SHAREHOLDERS EXHIBIT 99.1 December 30, 2022 First Guaranty Bancshares, Inc. Letter to Shareholders Dear Shareholders, The fourth quarter of 2022 has concluded and with its conclusion we also reached the end of the year of 2022. 2022 has been an extremely successful year for First Guaranty Bancshares, Inc. As a result, you are receiving your 118th

December 16, 2022 8-K

Financial Statements and Exhibits, Changes in Registrant's Certifying Accountant

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 Date of Report (Date of earliest event reported): December 15, 2022 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File N

December 16, 2022 EX-16.1

Exhibit 16.1

Exhibit 16.1 December 15, 2022 Securities and Exchange Commission 100 F Street, N.E. Washington, DC 20549 Re: First Guaranty Bancshares, Inc. Dear Sir or Madam: We have read Item 4.01 of First Guaranty Bancshares, Inc?s Current Report on Form 8-K dated December 15, 2022 and we agree with the statements concerning our firm contained therein. We have no basis to agree or disagree with any other matt

November 21, 2022 8-K

Other Events

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 Date of Report (Date of earliest event reported): November 17, 2022 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File N

November 21, 2022 EX-99

First Guaranty Bank named Best Small Bank in America and Louisiana by Newsweek for the Third Year in a Row

EXHIBIT 99.1 NOVEMBER 21, 2022 NEWS FOR IMMEDIATE RELEASE CONTACT: ALTON B. LEWIS, CEO AND ERIC J. DOSCH, CFO 985.375.0350/985.375.0308 First Guaranty Bank named Best Small Bank in America and Louisiana by Newsweek for the Third Year in a Row HAMMOND, LA, November 21, 2022 ? For the third year in a row, First Guaranty Bank has been named the Best Small Bank in America and Louisiana by Newsweek, a

November 21, 2022 8-K

Financial Statements and Exhibits, Other Events

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 Date of Report (Date of earliest event reported): November 21, 2022 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File N

November 15, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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 Date of Report (Date of earliest event reported): November 15, 2022 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File N

November 15, 2022 EX-99.1

FIRST GUARANTY BANCSHARES, INC. FI R ST G UA R A N TY B A N CS H A R ES , I N C. FI R ST G UA R A N TY B A N CS H A R ES , I N C. Po st O ffi ce B ox 2 00 9 H am m on d, L ou is ia na 7 04 04 -2 00 9 PR ES O R TE D FI R ST -C LA SS M A IL U. S. P O S

FIRST GUARANTY BANCSHARES, INC. FI R ST G UA R A N TY B A N CS H A R ES , I N C. FI R ST G UA R A N TY B A N CS H A R ES , I N C. Po st O ffi ce B ox 2 00 9 H am m on d, L ou is ia na 7 04 04 -2 00 9 PR ES O R TE D FI R ST -C LA SS M A IL U. S. P O ST AG E PA ID B AT O N R O UG E, L A PE R M IT N O . 9 84 At A Glance (unaudited) Bank Officers Total Assets $3.1 Billion Deposits $2.7 Billion *Office

November 9, 2022 10-Q

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, 2022 ☐ TRANSITION REPORT PURSUANT

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, 2022 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 BANCSHARE

November 7, 2022 8-K

Financial Statements and Exhibits, Other Events

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 Date of Report (Date of earliest event reported): November 7, 2022 FIRST GUARANTY BANCSHARES, INC. (Exact name of registrant as specified in its charter) Louisiana 001-37621 26-0513559 (State or other jurisdiction (Commission File Nu

November 7, 2022 EX-99.1

FIRST GUARANTY BANK RECEIVES REGULATORY APPROVAL FOR NEW BRANCHES IN MIDEAST MARKET FGB solidifies move into Mideast Market with official regulatory approval

EXHIBIT 99.1 NOVEMBER 7, 2022 NEWS FOR IMMEDIATE RELEASE CONTACT: ALTON B. LEWIS, CEO AND ERIC J. DOSCH, CFO 985.375.0350/985.375.0308 FIRST GUARANTY BANK RECEIVES REGULATORY APPROVAL FOR NEW BRANCHES IN MIDEAST MARKET FGB solidifies move into Mideast Market with official regulatory approval HAMMOND, LA, November 7, 2022 ? First Guaranty has received approval from its primary regulators to open fu

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