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): ~~May 26~~July 6, 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 1/40th interest in a share of 7.50% Series A Fixed-Rate Non-Cumulative Perpetual Preferred Stock)	MNSBP	The Nasdaq Stock Market LLC
Depositary Shares (each representing a 1/40th 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 ~~May~~July 266, 2026, MainStreet Bancshares, Inc. (the “"Company”") ~~the~~announced ~~holding~~that ~~company~~it ~~for~~will ~~MainStreet~~conduct ~~Bank,~~a ~~announced~~virtual ~~that~~webcast ~~since~~and ~~the~~quarterly ~~beginning~~earnings ofconference ~~the~~call ~~second~~on ~~quarter~~Monday, ~~the~~July ~~Company~~20, ~~has repurchased 207~~2026,~~000~~ ~~shares of outstanding common stock~~ at an2:00 ~~average price of $24~~p.~~09 per share under its current stock repurchase program~~m. ~~The~~Eastern ~~shares~~Time ~~were~~during ~~repurchased~~which ~~in accordance with~~ the ~~limitations~~Company ~~set~~will ~~forth~~discuss insecond ~~Rule~~quarter results ~~10b-18~~as ofwell ~~the~~as ~~Securities~~provide ~~and~~an ~~Exchange~~update on ~~Commission~~recent ~~and other applicable legal requirements~~activities. AsInvestors ofthat ~~March~~are ~~31,~~interested ~~2025,~~in ~~our~~attending ~~tangible book value was $25.63. The share repurchase program does not obligate~~ the ~~Company~~virtual towebcast ~~repurchase~~should ~~any~~contact ~~dollar~~Hattie ~~amount~~Lester orby ~~number~~email ofat ~~shares,~~[email protected] ~~and the program may be extended, suspended,~~ or ~~discontinued~~by phone at ~~any time~~(571)-375-1364.

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: May 26, 2026	By:	/s/ Richard A. Vari
Date: July 6, 2026	By:	/s/ Richard A. Vari
		Name: Richard A. Vari
		Title: Chief Financial Officer

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