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 1017, 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)	(I.R.S. Employer
incorporation or organization)		Identification Number)

400 East Thomas Street
Hammond, Louisiana		70401
(Address of principal executive offices)		(Zip Code)


(985) 345-7685
(Registrant’s telephone number, including area code)

Not Applicable
(Former name or former address, if changed since last report)

Check the appropriate box if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

☐ Written communications pursuant to Rule 425 under Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Securities registered pursuant to Section 12(b) of the Act:

Title of each class

Trading Symbol(s)

Name of each exchange on which registered

Common Stock, $1 par value

FGBI

The Nasdaq Stock Market LLC

Depositary Shares (each representing a 1/40th interest in a share of 6.75% Series A Fixed-Rate Non-Cumulative perpetual preferred stock)

FGBIP

The Nasdaq Stock Market LLC

Item 78.01 ~~Regulation~~Other ~~FD Disclosure~~Events

On ~~March~~February 1019, 2026, the Board of Directors of First Guaranty Bancshares, Inc. (“"First Guaranty”") ~~issued~~declared a ~~press~~quarterly ~~release~~cash ~~announcing~~dividend ~~that~~on ~~its wholly-owned banking subsidiary,~~ First Guaranty's ~~Bank~~outstanding ~~(the~~shares ~~“Bank”),~~of ~~entered~~common ~~into~~stock anof ~~agreement~~$0.01 ~~with~~per ~~Armstrong~~share. ~~Bank,~~The ~~Muskogee,~~dividend ~~Oklahoma,~~will tobe ~~sell~~payable ~~the~~to ~~Bank's~~shareholders ~~Texas~~of ~~operations,~~record ~~consisting~~as of ~~five~~March ~~branches and related deposits~~27, ~~loans~~2026 and ~~certain~~is ~~other~~expected ~~assets,~~ to ~~Armstrong~~be ~~Bank.~~paid ~~The~~on ~~press~~March ~~release~~31, ~~announcing~~2026. ~~the~~This ~~transaction~~ is ~~attached~~the as131st ~~Exhibit~~consecutive ~~99.1,~~quarterly ~~and~~dividend ispaid ~~incorporated~~to ~~herein~~common ~~by reference~~shareholders.

The information in this Item 7.01 and Exhibit 99.1 shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933.

Item 9.01 Financial Statements and Exhibits

Exhibit 99.1 Press Release dated March 10, 2026.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

	FIRST GUARANTY BANCSHARES, INC.
	(Registrant)
Date: March 10, 2026
Date: March 17, 2026
	By:	/s/Eric J. Dosch
		Eric J. Dosch
		Chief Financial Officer

INDEX TO EXHIBITS

Exhibit Number			Description
Exhibit 99.1			First Guaranty Bancshares, Inc. Press Release dated March 10, 2026.

Filing Compare · First Guaranty Bancshares, Inc.