MainStreet Bancshares

MainStreet Bancshares, also known as MainStreet Bank, is a financial institution headquartered in the United States of America. The organization provides banking services, including deposit accounts and lending products, to personal and business customers. Its operations rely on a core banking platform that processes transactions and manages customer information. The bank’s services are delivered domestically, consistent with its U.S. headquarters location. As a regulated entity, MainStreet Bancshares is subject to oversight by federal and state banking authorities.

On March 1, 2025, MainStreet Bancshares disclosed that a third‑party vendor supporting its core banking platform experienced a data breach. The breach exposed personal information of a small subset of the bank’s customers. The company confirmed that its own systems were not compromised and that no unauthorized transactions or fund transfers resulted from the incident. In response, MainStreet Bancshares notified regulators, offered affected customers credit‑monitoring services, and terminated its relationship with the vendor. It described the incident as having no material impact on its operations, financial condition, or reputation. The disclosure appeared in an SEC Form 8‑K filing and was also covered by industry news sources.