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

Date of Report (Date of earliest event reported): March 325, 2026

MainStreet Bancshares, Inc.

(Exact name of Registrant as Specified in Its Charter)

Virginia	001-38817	81-2871064
(State or Other Jurisdiction of Incorporation)	(Commission File Number)	(IRS Employer Identification No.)

10089 Fairfax Boulevard, Fairfax, VA		22030
(Address of Principal Executive Offices)		(Zip Code)

(703) 481-4567

(Registrant’s Telephone Number, Including Area Code)

Not Applicable

(Former Name or Former Address, if Changed Since Last Report)

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 (see General Instructions A.2. below):

☐ 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:

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common Stock	MNSB	The Nasdaq Stock Market LLC
Depositary Shares (each representing a 1/40^th interest in a share of 7.50% Series A Fixed-Rate Non-Cumulative Perpetual Preferred Stock)	MNSBP	The Nasdaq Stock Market LLC

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 87.01 ~~Other~~Regulation ~~Events~~FD Disclosure.

On March 325, 2026, MainStreet Bancshares, Inc. (the “"Company”") issued ~~the~~a ~~holding~~press ~~company~~release ~~for~~regarding ~~MainStreet~~an ~~Bank,~~addition ~~announced~~to ~~that~~MainStreet ~~since~~Bank's ~~the~~Board ~~beginning~~ of ~~the~~Directors. ~~year,~~A ~~the~~copy ~~Company has repurchased 174,280 shares~~ of ~~outstanding common stock at an average price of $22.45~~ ~~per share under its current stock repurchase program. The shares were repurchased in accordance with~~ the ~~limitations~~related ~~set~~press ~~forth~~release inis ~~Rule~~attached ~~10b-18~~hereto ofas ~~the~~Exhibit ~~Securities and Exchange Commission and other applicable legal requirements~~99. ~~As of December 31~~1, ~~2025,~~is ~~our~~hereby ~~tangible~~incorporated ~~book~~by ~~value was $25.52. The share repurchase program does not obligate the Company to repurchase any dollar amount or number of shares~~reference, and ~~the~~will ~~program may~~ be ~~extended,~~posted ~~suspended,~~on orthe ~~discontinued~~Company’s ~~at any time~~website.

Item 9.01 Other Events.

(d) Exhibits.

Exhibit Number		Description
99.1		Press Release, dated March 25, 2026.
104		Cover Page Interactive Data File (embedded within the Inline XBRL document).

The information furnished under Items 7.01 and 9.01 of this Current Report on Form 8-K, including the exhibits, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that Section, and it shall not be deemed incorporated by reference in any filing under the Exchange Act, or the Securities Act of 1933, as amended, except as expressly set forth by specific reference in such filing to this Form 8-K.

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.

	MAINSTREET BANCSHARES, INC
Date: March 3, 2026	By:	/s/ Richard A. Vari
Date: March 25, 2026	By:	/s/ Richard A. Vari
		Name: Richard A. Vari
		Title: Chief Financial Officer

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