MainStreet Bank 401(k) Retirement Plan - 31 Dec 2025 SCHEDULE 13G Report for MainStreet Bancshares, Inc. Common Stock, par value $4.00 per share (MNSB)

Filing Manager: MainStreet Bank 401(k) Retirement Plan
Reporting Manager: MainStreet Bank 401(k) Retirement Plan
Security: MainStreet Bancshares, Inc. Common Stock, par value $4.00 per share
Symbol: MNSB
Shares outstanding: 7,524,765 shares
Disclosed Ownership: 383,763 shares
Ownership: 5.1%
Form type: SCHEDULE 13G
Filing time: 24 Feb 2026, 16:11:30 UTC
Date of event: 31 Dec 2025
SEC: View on sec.gov

Reporting Managers (1)

Name	Ownership	Shares Owned	sole voting power	shared voting power	Signature	Title	CIK
MainStreet Bank 401(k) Retirement Plan	5.1%	383,763	0	383,763	/s/ Richard A. Vari	Richard A. Vari/Plan Administrator