MainStreet Bancshares (MNSB) 401(k) Plan Holds 5.1% Stake

Rhea-AI Filing Summary

MainStreet Bancshares, Inc. Schedule 13G reports that the MainStreet Bank 401(k) Retirement Plan, through its administrator Richard A. Vari, beneficially owns 383,763 shares of common stock, representing 5.1% of the class as of 12/31/2025.

The filing states the Plan holds shared voting power and shared dispositive power over 383,763 shares. The Plan is subject to ERISA and Delaware Charter Guarantee & Trust Company dba Principal Trust Company serves as Trustee; participants may direct the Trustee how to vote. The certification is signed by Richard A. Vari as Plan Administrator on 02/24/2026.

Insights

Institutional Ownership Analyst

401(k) plan disclosed a passive, >5% stake with shared voting power.

The Schedule 13G shows the MainStreet Bank 401(k) Retirement Plan beneficially owns 383,763 shares, equal to 5.1% as of 12/31/2025. Ownership is recorded as shared voting and dispositive power rather than sole control.

Because the Plan is governed by ERISA and a trustee votes per participant directions, trading or voting activity will depend on participant instructions and trustee procedures; subsequent filings would show any change in the passive ownership position.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

MainStreet Bancshares, Inc.

(Name of Issuer)

Common Stock, par value $4.00 per share

(Title of Class of Securities)

56064Y100

(CUSIP Number)

12/31/2025

(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)

SCHEDULE 13G

CUSIP No. 56064Y100

1

Names of Reporting Persons

MainStreet Bank 401(k) Retirement Plan

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

VIRGINIA

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 383,763.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 383,763.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

383,763.00

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)

5.1 %

12

Type of Reporting Person (See Instructions)

EP

Comment for Type of Reporting Person: MainStreet Bancshares, Inc. on behalf of MainStreet Bank 401(k) Retirement Plan

SCHEDULE 13G

Item 1.
(a)	Name of issuer: MainStreet Bancshares, Inc.
(b)	Address of issuer's principal executive offices: 10089 FAIRFAX BOULEVARD, FAIRFAX, VIRGINIA, 22030.
Item 2.
(a)	Name of person filing: Richard A. Vari, as Administrator for the Plan
(b)	Address or principal business office or, if none, residence: 10089 Fairfax Boulevard, Fairfax, VA 22030
(c)	Citizenship: Virginia
(d)	Title of class of securities: Common Stock, par value $4.00 per share
(e)	CUSIP No.: 56064Y100
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: 383,763
(b)	Percent of class: 5.1 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 0
	(ii) Shared power to vote or to direct the vote: 383,763 The Plan is subject to the Employee Retirement Income Security Act of 1974 ("ERISA"). Delaware Charter Guarantee & Trust Company dba Principal Trust Company acts as Trustee of the Plan (the "Trust"). The Trust is subject to fiduciary duties under ERISA and the Trust agreements. Before each meeting of shareholders, Plan participants may direct the Trustee how to vote at such meeting or any adjournment thereof. If participants have not directed the Trustee on how to vote, the Trustee shall vote such securities in the same proportion as those shares for which the Trustee has received proper direction.
	(iii) Sole power to dispose or to direct the disposition of: 0
	(iv) Shared power to dispose or to direct the disposition of: 383,763
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 foreign regulatory scheme applicable to Employee Benefit Plan is substantially comparable to the regulatory scheme applicable to the functionally equivalent U.S. institution(s). I also undertake to furnish to the Commission staff, upon request, information that would otherwise be disclosed in a Schedule 13D.

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.

MainStreet Bank 401(k) Retirement Plan

Signature:	/s/ Richard A. Vari
Name/Title:	Richard A. Vari/Plan Administrator
Date:	02/24/2026

FAQ

What stake does the MainStreet Bank 401(k) Retirement Plan hold in MNSB?

The Plan beneficially owns 383,763 shares, representing 5.1% of the common stock as of 12/31/2025. The ownership is reported on a Schedule 13G filed and certified by the Plan Administrator.

Who filed the Schedule 13G for MNSB and when was it signed?

The filing was submitted on behalf of the Plan by Richard A. Vari as Plan Administrator and signed on 02/24/2026. The filing identifies the Plan and the Trustee responsible for voting procedures.

Does the Plan have sole voting control over the shares reported for MNSB?

No. The Schedule 13G reports 0 shares with sole voting power and 383,763 shares with shared voting power. Voting is administered by the Trustee under participant directions per ERISA rules.

Who acts as Trustee for the MainStreet Bank 401(k) Retirement Plan?

The filing names Delaware Charter Guarantee & Trust Company dba Principal Trust Company as Trustee. The Trustee votes shares according to participant directions or proportionally for undirected shares.

Is this Schedule 13G an active or passive ownership disclosure for MNSB?

The Schedule 13G describes the Plan's holding consistent with institutional/beneficial ownership reporting; it records shared voting and dispositive power but does not assert active control over corporate decisions.