Thibeaux reports 404,223 shares (6.2%) in Red River Bancshares

Red River Bancshares, Inc. owner disclosure: Simeon A. Thibeaux reports beneficial ownership of 404,223 shares of common stock, representing 6.2% of the class.

Rhea-AI Filing Summary

Red River Bancshares, Inc. owner disclosure: Simeon A. Thibeaux reports beneficial ownership of 404,223 shares of common stock, representing 6.2% of the class. He holds 337,812 shares with sole voting and dispositive power and 66,411 shares with shared voting and dispositive power via S3 Dynamics, L.P.

The filing states Mr. Thibeaux is sole trustee of two trusts holding a combined 337,812 shares and is one of three managers of S3 Management, L.L.C., which is the general partner of S3 Dynamics, L.P., holding 66,411 shares.

Insights

Corporate Governance Analyst

Beneficial ownership shows a concentrated stake with mixed direct and indirect control.

The filing documents 404,223 shares (6.2%) beneficially owned by Simeon A. Thibeaux, with 337,812 shares held through two trusts where he is sole trustee and 66,411 shares held via S3 Dynamics, L.P.

This ownership structure combines direct trustee control and indirect partnership interests; subsequent disclosures that change voting or dispositive arrangements would be the primary developments to watch in future filings.

Key Figures

Beneficial ownership: 404,223 shares Percent of class: 6.2% Sole voting power: 337,812 shares +1 more

4 metrics

Beneficial ownership 404,223 shares total beneficially owned

Percent of class 6.2% percent of common stock

Sole voting power 337,812 shares sole power to vote/direct disposition via two trusts

Shared voting power 66,411 shares held by S3 Dynamics, L.P.

Key Terms

Beneficially owned, Sole trustee, S3 Dynamics, L.P., Sole general partner

4 terms

Beneficially owned regulatory

"Amount beneficially owned: 404,223"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

Sole trustee legal

"The Reporting Person is the sole trustee of each of the JCSJ Trust and the AKS Trust"

S3 Dynamics, L.P. other

"Shares are held by S3 Dynamics, L.P."

Sole general partner legal

"The sole general partner of S3 Dynamics, L.P. is S3 Management, L.L.C."

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What stake does Simeon A. Thibeaux report in RRBI?

Mr. Thibeaux reports beneficial ownership of 404,223 shares, representing 6.2% of Red River Bancshares' common stock. The holding combines trust-held shares and limited-partnership interests described in the filing.

How many RRBI shares does Mr. Thibeaux control solely?

He has sole voting and dispositive power over 337,812 shares. These shares are held of record by two trusts for which he is the sole trustee, as stated in the filing.

What portion of the position is held indirectly via S3 Dynamics, L.P.?

The filing shows 66,411 shares with shared voting and dispositive power held by S3 Dynamics, L.P., whose general partner is S3 Management, L.L.C., where Mr. Thibeaux is one of three managers.

Does the filing describe how the trusts and partnerships are related?

Yes. The filing states the JCSJ and AKS Trusts hold the sole-trustee shares and that S3 Management, L.L.C. is the sole general partner of S3 Dynamics, L.P., with Mr. Thibeaux a manager and advisor to related trusts.

When was this beneficial ownership disclosed?

The Schedule 13G/A was signed by Simeon A. Thibeaux on 04/22/2026, per the filing, reflecting the disclosed beneficial ownership and authority descriptions as presented.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 04/22/2026 - 03:11 PM EDT Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 8)

Red River Bancshares, Inc.

(Name of Issuer)

Common stock, no par value per share

(Title of Class of Securities)

75686R202

(CUSIP Number)

03/31/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 75686R202

1

Names of Reporting Persons

Simeon A. Thibeaux

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

LOUISIANA

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 337,812.00
6	Shared Voting Power 66,411.00
7	Sole Dispositive Power 337,812.00
8	Shared Dispositive Power 66,411.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

404,223.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

6.2 %

12

Type of Reporting Person (See Instructions)

IN

Comment for Type of Reporting Person: Shares identified as subject to sole voting power (line 5) and sole dispositive power (line 7) consist of 170,573 shares of Common Stock held of record by the John Charles Simpson Jr. Trust ("JCSJ Trust") and 167,239 shares of Common Stock held of record by the Angela Katherine Simpson Trust ("AKS Trust"). The Reporting Person is the sole trustee of each of the JCSJ Trust and the AKS Trust. Shares identified as subject to shared voting power (line 6) and shared dispositive power (line 8) are held by S3 Dynamics, L.P. The sole general partner of S3 Dynamics, L.P. is S3 Management, L.L.C., which has management authority over S3 Dynamics, L.P., and Mr. Thibeaux is one of three managers of S3 Management, L.L.C. Mr. Thibeaux is also the trustee or an investment advisor of trusts owning 100% of the limited partnership interests in S3 Dynamics, L.P.

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Red River Bancshares, Inc.
(b)	Address of issuer's principal executive offices: 1412 Centre Court Drive, Suite 301, Alexandria, Louisiana, 71301
Item 2.
(a)	Name of person filing: Simeon A. Thibeaux
(b)	Address or principal business office or, if none, residence: 1412 Centre Court Drive, Suite 301, Alexandria, LA 71301
(c)	Citizenship: State of Louisiana
(d)	Title of class of securities: Common stock, no par value per share
(e)	CUSIP No.: 75686R202
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: 404,223
(b)	Percent of class: 6.2 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 337,812. Consists of 170,573 shares of Common Stock held of record by the John Charles Simpson Jr. Trust ("JCSJ Trust") and 167,239 shares of Common Stock held of record by the Angela Katherine Simpson Trust ("AKS Trust"). The Reporting Person is the sole trustee of each of the JCSJ Trust and the AKS Trust.
	(ii) Shared power to vote or to direct the vote: 66,411. Shares are held by S3 Dynamics, L.P. The sole general partner of S3 Dynamics, L.P. is S3 Management, L.L.C., which has management authority over S3 Dynamics, L.P., and Mr. Thibeaux is one of three managers of S3 Management, L.L.C. Mr. Thibeaux is also the trustee or an investment advisor of trusts owning 100% of the limited partnership interests in S3 Dynamics, L.P.
	(iii) Sole power to dispose or to direct the disposition of: 337,812. Consists of 170,573 shares of Common Stock held of record by the JCSJ Trust and 167,239 shares of Common Stock held of record by the AKS Trust. The Reporting Person is the sole trustee of each of the JCSJ Trust and the AKS Trust.
	(iv) Shared power to dispose or to direct the disposition of: 66,411. Shares are held by S3 Dynamics, L.P. The sole general partner of S3 Dynamics, L.P. is S3 Management, L.L.C., which has management authority over S3 Dynamics, L.P., and Mr. Thibeaux is one of three managers of S3 Management, L.L.C. Mr. Thibeaux is also the trustee or an investment advisor of trusts owning 100% of the limited partnership interests in S3 Dynamics, L.P.
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Simeon A. Thibeaux

Signature:	/s/ Simeon A. Thibeaux
Name/Title:	Simeon A. Thibeaux
Date:	04/22/2026