144 0001788697 XXXXXXXX LIVE 0001693577 MainStreet Bancshares, Inc. 001-38817 10089 FAIRFAX BOULEVARD FAIRFAX VA 22030 703-481-4567 Vari, Richard A. (MNSB) Officer Common Stock Vanguard Brokerage Services

P.O. Box 1170 Valley Forge PA 19482

4516 103868.00 7117438 06/01/2026 NASDAQ Common Stock 01/01/2022 Restricted Stock Vesting Issuer N 1616 01/01/2022 Compensation Common Stock 01/01/2023 Restricted Stock Vesting Issuer N 1300 01/01/2023 Compensation Common Stock 01/01/2026 Restricted Stock Vesting Issuer N 1600 01/01/2026 Compensation Y 05/28/2026 /s/ Richard A. Vari