Material Event (Form 8-K)

Item 8.01 Other Events.

On October 16, 2025, the Board of Directors of MainStreet Bancshares, Inc. authorized a new stock repurchase program (the "New Stock Repurchase Program") to repurchase up to $10.0 million of the Company's outstanding common stock. This New Stock Repurchase Program will replace and supersede the Company's existing stock repurchase program which was originally announced on May 19, 2022. The timing, number and purchase price of stock repurchased under the New Stock Repurchase Program will be determined by management at its discretion and will depend on a number of factors, including the market price of the shares, general market and economic conditions, applicable legal requirements and other conditions, and there is no assurance that the Company will purchase any stock under the program. Stock repurchases under the New Stock Repurchase Program will be made from time to time, on the open market, in privately negotiated transactions or in such other manner as will comply with applicable law and regulations, at the discretion of Company management. The Company currently anticipates that the New Stock Repurchase Program will extend over an 18-month time frame, or earlier if the shares have been repurchased. The New Stock Repurchase Program may be extended, modified, suspended, or discontinued at any time.