Business Description

As used herein, the “Company,” “we,” “our,” and “us” refer to MainStreet Bancshares, Inc., and the “Bank” refers to MainStreet Bank. Overview MainStreet Bancshares, Inc. is a financial holding company that owns 100% of MainStreet Bank and MainStreet Community Capital, LLC. On October 12, 2021, the Company filed an election to be a financial holding company with the Board of Governors of the Federal Reserve System (the “Federal Reserve”). The Company elected financial holding company status in order to engage in a broader range of financial activities than are permitted for bank holding companies generally. We emphasize providing responsive and personalized services to our clients. Due to the consolidation of financial institutions in our primary market area, we believe there is a significant opportunity for a local bank to provide a full range of financial services. By offering highly professional, personalized banking products and service delivery methods and employing advanced banking technologies, we seek to distinguish ourselves from larger, regional banks operating in our market area and are able to compete effectively with other community banks. MainStreet Bancshares, Inc. MainStreet Bancshares Inc. is a bank holding company incorporated under the laws of the Commonwealth of Virginia whose principal activity is the ownership and management of MainStreet Bank and MainStreet Community Capital, LLC. The Company is authorized to issue 15,000,000 shares of common stock, par value $4.00 per share. Additionally, the Company is authorized to issue 2,000,000 shares of preferred stock, par value $1.00 per share. There were 7,496,571, shares of common stock outstanding and 28,750 shares of 7.50% Series A Fixed-Rate Non-Cumulative Perpetual Preferred Stock outstanding at December 31, 2025. At that date, there were also outstanding 1,150,000 depositary shares, each representing a 1/40 th interest in a share of the Company’s Series A Preferred Stock, with a liquidation preference of $1,000 per share (equivalent to $25 per depositary share). The Company is a registered bank holding company which is governed under the Bank Holding Company Act of 1956, as amended (the “Bank Holding Act”), that has elected to be a financial holding company. As such, is subject to inspection, examination, and supervision by the Federal Reserve. The Company’s executive offices are located at 10089 Fairfax Boulevard, Fairfax, Virginia. Our telephone number is (703) 481-4567, and our internet address is www.mstreetbank.com. The information contained on our website shall not be considered part of this Form 10-K, and the reference to our website does not constitute incorporation by reference of the information contained on the website. The Company acquired the property located in Middleburg, VA during 2025 but the branch officially commenced retail banking operations on February 9, 2026. MainStreet Bank MainStreet Bank is a community commercial bank incorporated in and chartered by the Commonwealth of Virginia. The Bank is a member of the Federal Reserve Bank of Richmond, and its deposits are insured by the FDIC. The Bank opened for business on May 26, 2004, and is headquartered in Fairfax, Virginia. We currently operate seven Bank branches; located in Herndon, Fairfax, McLean, Clarendon, Leesburg, and Middleburg, Virginia, and one in Washington D.C. The Bank is a community bank focused on serving the borrowing, cash management and depository needs of retail customers, small to medium-sized businesses, and professionals. We believe we have a solid franchise that meets the financial needs of our clients and communities by providing an array of personalized products and services delivered by seasoned banking professionals with decisions made at the local level. We believe a significant customer base in our market prefers to do business with a local institution that has a local management team, a local Board of Directors and local founders and that this customer base may not be satisfied with the responsiveness of larger regional banks. By providing quality services, coupled with the opportunities provided by the economies in our market area, we have generated and expect to continue to generate organic growth. We service Northern Virginia as well as the greater Washington, D.C. metropolitan area. Our goal is to deliver a customized and targeted mix of products and services that meets or exceeds customer expectations.…