Fourthstone reports 6.02% stake in Investar

Rhea-AI Filing Summary

Fourthstone group reports passive 13G/A stake in Investar Holding Corp. Fourthstone LLC and related entities report beneficial ownership of 827,389 shares of Common Stock, representing 6.02% of the class based on 13,750,025 shares outstanding as of March 12, 2026. The filing lists additional Fourthstone-related holdings across affiliated vehicles (examples include 647,255 and 180,134 shares). The Reporting Persons state the shares were acquired in the ordinary course of business and not to influence control of the issuer.

Insights

Institutional Ownership Analyst

Passive 13G/A discloses a meaningful 6.02% stake in Investar as of March 12, 2026.

The filing shows Fourthstone LLC directly holds 827,389 shares and related entities hold additional positions (e.g., 647,255, 180,134). The reported 13,750,025 share base is the issuer figure used to compute percentages.

Because the filing is a Schedule 13G/A, the group characterizes the position as passive; cash‑flow treatment and any future disposition plans are not disclosed in the excerpt.

Securities Compliance Counsel

Schedule 13G/A format and certifications indicate passive investment status.

The Reporting Persons certify the securities "were not acquired and are not held for the purpose of or with the effect of changing or influencing the control" of the issuer. The filing lists shared voting and dispositive power figures for each entity for transparency under Section 13.

Investors and counterparties should note percentages are computed using the issuer's Form 10‑K share count dated March 12, 2026; subsequent filings could change reported percentages.

Key Figures

Fourthstone direct holdings: 827,389 shares Percent of class: 6.02% Shares outstanding used: 13,750,025 shares +4 more

7 metrics

Fourthstone direct holdings 827,389 shares Directly held by Fourthstone LLC

Percent of class 6.02% Based on 13,750,025 shares outstanding as of March 12, 2026

Shares outstanding used 13,750,025 shares Outstanding share count referenced from issuer Form 10‑K

Fourthstone Master Opportunity Fund Ltd 647,255 shares Affiliated holding shown on cover page

Fourthstone GP LLC 180,134 shares Affiliated holding shown on cover page

Fourthstone QP Opportunity Fund 178,482 shares Affiliated holding shown on cover page

Fourthstone Small‑Cap Financials Fund 1,652 shares Affiliated holding shown on cover page

Key Terms

beneficially owned, shared dispositive power, Schedule 13G/A, percent of class

4 terms

beneficially owned regulatory

"Amount beneficially owned: Fourthstone LLC acquired the Issuer's shares in the ordinary course"

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.

shared dispositive power regulatory

"Shared Dispositive Power 827,389.00"

Schedule 13G/A regulatory

"This is being filed by Fourthstone LLC... (Schedule 13G/A amendment)"

A Schedule 13G/A is an amended public filing with the U.S. securities regulator that updates a previous Schedule 13G, disclosing when an individual or group holds a substantial (typically over 5%) stake in a company and is claiming a passive, non‑controlling intent. Investors monitor these updates because rising or falling holdings can signal changing confidence, potential future moves, or shifts in voting power — like watching a public ledger where large shareholders quietly adjust their positions.

percent of class financial

"The percentages reported in Row 11 ... are based on 13,750,025 shares of Common Stock outstanding"

Percent of class is the portion of a specific category of securities—such as a company’s common shares, preferred shares, or a bond series—that takes part in or approves a corporate action (vote, consent, tender, etc.). Investors watch this number because it reveals how much support or opposition exists within that particular shareholder group; like counting how many members of a club back a proposal, it can determine whether a plan passes or how influence is distributed.

FAQ

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

What stake does Fourthstone report in Investar (ISTR)?

The filing reports Fourthstone LLC beneficially owns 827,389 shares, equal to 6.02% of common stock based on 13,750,025 shares outstanding as of March 12, 2026.

Does the 13G/A state Fourthstone seeks control of Investar (ISTR)?

No. The Reporting Persons certify the shares "were not acquired and are not held for the purpose nor with the effect of influencing the control" of the issuer, indicating a passive investment posture.

Are there other Fourthstone-related holdings disclosed in the filing?

Yes. Examples shown include Fourthstone Master Opportunity Fund Ltd with 647,255 shares (4.71%) and Fourthstone GP LLC with 180,134 shares (1.31%), as listed on the cover pages.

What share count does the filing use to compute percentages for ISTR?

Percentages are based on 13,750,025 shares of Common Stock outstanding as of March 12, 2026, per the issuer's Form 10‑K cited in the filing.

Who signed the amendment to the Schedule 13G/A for ISTR?

Signatories include Amy M. Stone (Chief Executive Officer) and L. Phillip Stone, IV (Managing Member of Fourthstone GP LLC and principal owner of Fourthstone LLC), with dates shown as May 15, 2026.

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

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Accepted by SEC EDGAR 05/15/2026 - 04:54 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. 1)

Investar Holding Corp

(Name of Issuer)

Common Stock, $1.00 par value per share

(Title of Class of Securities)

46134L105

(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): 46134L105

1

Names of Reporting Persons

Fourthstone LLC

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

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 827,389.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 827,389.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

827,389.00

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)

6.02 %

12

Type of Reporting Person (See Instructions)

IA

Comment for Type of Reporting Person: See Item 4 for a description of the information reported in rows (6), (8), (9) and (11).

SCHEDULE 13G

CUSIP Number(s): 46134L105

1

Names of Reporting Persons

Fourthstone Master Opportunity Fund Ltd

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

CAYMAN ISLANDS

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 647,255.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 647,255.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

647,255.00

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)

4.71 %

12

Type of Reporting Person (See Instructions)

OO

Comment for Type of Reporting Person: See Item 4 for a description of the information reported in rows (6), (8), (9) and (11).

SCHEDULE 13G

CUSIP Number(s): 46134L105

1

Names of Reporting Persons

Fourthstone GP LLC

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

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 180,134.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 180,134.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

180,134.00

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)

1.31 %

12

Type of Reporting Person (See Instructions)

OO

Comment for Type of Reporting Person: See Item 4 for a description of the information reported in rows (6), (8), (9) and (11).

SCHEDULE 13G

CUSIP Number(s): 46134L105

1

Names of Reporting Persons

Fourthstone QP Opportunity Fund LP

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

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 178,482.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 178,482.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

178,482.00

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)

1.30 %

12

Type of Reporting Person (See Instructions)

PN

Comment for Type of Reporting Person: See Item 4 for a description of the information reported in rows (6), (8), (9) and (11).

SCHEDULE 13G

CUSIP Number(s): 46134L105

1

Names of Reporting Persons

Fourthstone Small-Cap Financials Fund LP

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

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 1,652.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 1,652.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

1,652.00

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)

0.01 %

12

Type of Reporting Person (See Instructions)

PN

Comment for Type of Reporting Person: See Item 4 for a description of the information reported in rows (6), (8), (9) and (11).

SCHEDULE 13G

CUSIP Number(s): 46134L105

1

Names of Reporting Persons

L. Phillip Stone, IV

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

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 827,389.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 827,389.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

827,389.00

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)

6.02 %

12

Type of Reporting Person (See Instructions)

IN

Comment for Type of Reporting Person: See Item 4 for a description of the information reported in rows (6), (8), (9) and (11).

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Investar Holding Corp
(b)	Address of issuer's principal executive offices: 10500 COURSEY BLVD, THIRD FLOOR, BATON ROUGE, LA 70816
Item 2.
(a)	Name of person filing: This Schedule 13G is being filed by Fourthstone LLC, a Delaware Limited Liability Company and Investment Adviser ("Fourthstone"). The persons reporting information on this Schedule 13G include, in addition to Fourthstone, a company incorporated in the Cayman Islands ("Fourthstone Master Opportunity Fund"), a Delaware Limited Partnership ("Fourthstone QP Opportunity"), a Delaware Limited Partnership ("Fourthstone Small-Cap Financials"), a Delaware Limited Liability Company ("Fourthstone GP, " General Partner of Fourthstone QP Opportunity and Fourthstone Small-Cap Financials), and L. Phillip Stone, IV, a citizen of the United States of America, who is the Managing Member of Fourthstone and Fourthstone GP (each, a "Reporting Person" and, together, the "Reporting Persons"). Fourthstone directly holds 827,389 shares of Common Stock on behalf of its advisory clients. Each of the Reporting Persons listed in this filing certify 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 effect.
(b)	Address or principal business office or, if none, residence: The principal business address of each of the Reporting Persons is as follows: The registered office of Fourthstone LLC, Fourthstone Master Opportunity Fund Ltd., Fourthstone GP LLC, Fourthstone QP Opportunity Fund LP, Fourthstone Small-Cap Financials Fund LP is 575 Maryville Centre Drive, Suite 110, St. Louis, MO 63141.
(c)	Citizenship: See response to Item 4 of each of the cover pages.
(d)	Title of class of securities: Common Stock, $1.00 par value per share
(e)	CUSIP No.: 46134L105
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: Fourthstone LLC acquired the Issuer's shares in the ordinary course of business as a registered investment adviser and not with the purpose nor with the effect of influencing the control of the Issuer. Fourthstone GP LLC is the general partner of and may be deemed to beneficially own securities owned by Fourthstone QP Opportunity Fund LP and Fourthstone Small-Cap Financials Fund LP. L. Phillip Stone, IV, is the Managing Member of Fourthstone LLC and Fourthstone GP and may be deemed to beneficially own securities owned by Fourthstone. The percentages reported in Row 11 of each cover page are based on 13,750,025 shares of Common Stock (as defined below) of the Issuer (as defined below) outstanding as of March 12, 2026, based on the Issuer's Form 10-K filed on March 16, 2026.
(b)	Percent of class: 6.02 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: See responses to Item 5 on each cover page.
	(ii) Shared power to vote or to direct the vote: See responses to Item 6 on each cover page.
	(iii) Sole power to dispose or to direct the disposition of: See responses to Item 7 on each cover page.
	(iv) Shared power to dispose or to direct the disposition of: See responses to Item 8 on each cover page.
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 acquired and are held in the ordinary course of business and 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.

Fourthstone LLC

Signature:	Amy M. Stone
Name/Title:	Chief Executive Officer
Date:	05/15/2026

Fourthstone Master Opportunity Fund Ltd

Signature:	Amy M. Stone
Name/Title:	Chief Executive Officer
Date:	05/15/2026

Fourthstone GP LLC

Signature:	L. Phillip Stone, IV
Name/Title:	Managing Member of Fourthstone GP LLC
Date:	05/15/2026

Fourthstone QP Opportunity Fund LP

Signature:	Amy M. Stone
Name/Title:	Chief Executive Officer
Date:	05/15/2026

Fourthstone Small-Cap Financials Fund LP

Signature:	Amy M. Stone
Name/Title:	Chief Executive Officer
Date:	05/15/2026

L. Phillip Stone, IV

Signature:	L. Phillip Stone, IV
Name/Title:	Self, Principal owner of Fourthstone LLC
Date:	05/15/2026