0001710482 2026-10-01 2026-10-01 0001710482 1 2026-10-01 2026-10-01 iso4217:USD pure shares S-4 S-4 EX-FILING FEES 0001710482 John Marshall Bancorp, Inc. N/A N/A S-4 John Marshall Bancorp, Inc. false Equity Common stock, par value $0.01 per share true 10826600 248037406.00 0.000087 21579.25 248037406.00 21579.25 0.00 0.00 21579.25 true Represents the maximum number of shares of common stock, par value $0.01 per share, of John Marshall Bancorp, Inc., or JMSB, issuable upon the completion of the merger of Eagle Financial Services, Inc., or EFSI, and JMSB pursuant to the Agreement and Plan of Merger, dated as of September 7, 2026, by and among JMSB, George Sub, Inc. and EFSI, in exchange for shares of common stock of EFSI, par value $2.50 per share, or EFSI common stock. Estimated solely for the purpose of calculating the registration fee required by Section 6(b) of the Securities Act of 1933, or Securities Act, and computed pursuant to Rule 457(c) and 457(f)(1) under the Securities Act. The proposed maximum aggregate offering price was calculated as the product of (i) $45.82, the average of the high and low sales prices of EFSI common stock as reported on the Nasdaq on September 29, 2026 and (ii) 5,413,300, the estimated maximum number of shares of EFSI common stock that may be exchanged in connection with the merger, including in connection with shares of EFSI common stock subject to restricted stock awards. 5413300 45.82 248037406.00 248037406.00