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

November 24, 2025

Date of Report (Date of earliest event reported)

Red River Bancshares, Inc.

(Exact Name of Registrant as Specified in Charter)

(318) 561-4000

Registrant’s telephone number, including area code

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the 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))

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

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. ☐

Item. 5.02    Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

On November 24, 2025, Michael J. Brown notified the board of directors (the “Board”) of Red River Bancshares, Inc. (the “Company”) that he is resigning as a director of the Company and Red River Bank (the “Bank”), its wholly-owned subsidiary, effective November 24, 2025. Mr. Brown has served as a director of the Company and the Bank since January 25, 2024.

Blake Chatelain, President and Chief Executive Officer of the Company and the Bank, stated, “Michael has been a tremendous asset to our Company since joining. His advice and counsel have helped guide the Company and the Bank over the past two years, and we are grateful for his service.”

Michael Brown added, “I have enjoyed serving as a director for the Company and the Bank over the past couple of years, and I look forward to watching this organization’s continued success.”

Mr. Brown’s resignation is due to personal reasons and is not due to any disagreement with the Company or the Bank on any matter.

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.

Dated: November 28, 2025