0001710482 2026-08-18 2026-08-18 0001710482 false 8-K 2026-08-18 John Marshall Bancorp, Inc. VA 001-41315 81-5424879 1943 Isaac Newton Square Suite 100 Reston VA 20190 703 584-0840 false false false false Common Stock, par value $0.01 per share JMSB NASDAQ true true