Company: FGBI
Filing Date: 2025-04-18
Form Type: DEF 14A
Source: 0001408534-25-000019
Chunk: 0

Company: First Guaranty Bancshares, Inc.
Filing Date: 2025-04-18
Form: DEF 14A
Chunk 0
---
### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION

#### Washington, D.C. 20549

#### SCHEDULE 14A
<div align='center'>Proxy Statement Pursuant to Section 14(a) of

the Securities Exchange Act of 1934 (Amendment No. __ )</div>

| Filed by the Registrantx                    |     |                                                                                 |
| Filed by a Party other than the Registranto |     |                                                                                 |
| 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                                           |     | Definitive Proxy Statement                                                      |
| o                                           |     | Definitive Additional Materials                                                 |
| o                                           |     | Soliciting Material under §240.14a-12                                           |

| First Guaranty Bancshares, Inc.                                          |     |                                                                                                     |
| (Name of Registrant as Specified In Its Charter)                         |     |                                                                                                     |
| (Name of Person(s) Filing Proxy Statement, if other than the Registrant) |     |                                                                                                     |
| Payment of Filing Fee (Check all boxes that apply):                      |     |                                                                                                     |
| x                                                                        |     | No fee required.                                                                                    |
| o                                                                        |     | Fee paid previously with preliminary materials.                                                     |
| o                                                                        |     | Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a6(i)(1) and 0-11. |

#### FIRST GUARANTY BANCSHARES, INC.
<div align='center'>400 East Thomas Street

Hammond, Louisiana 70401</div>

### NOTICE OF ANNUAL MEETING OF SHAREHOLDERS

#### TO BE HELD ON MAY 15, 2025
To the Shareholders of First Guaranty Bancshares, Inc.:

You are cordially invited to attend the 2025 Annual Meeting of Shareholders (the "Meeting") of First Guaranty Bancshares, Inc. ("First Guaranty" or the "Company") which will be held in the FGB Center, 206 South Orange Street, Hammond, Louisiana, on Thursday, May 15, 2025, at 2:00 p.m., local time, for the purpose of considering and voting upon the following matters