First Tennessee Brokerage Memphis is a financial services company based in Memphis, Tennessee. It is a subsidiary of First Horizon National Corporation. The company utilizes the First Tennessee Bank name in the state of Tennessee, its primary market and where it has dominant market share. First Tennessee is the only major bank headquartered in the state. Until lately, it had expanded into Northern Virginia (2003), Maryland (2003), Georgia and Texas, selling these expansions to be able to concentrate on its core market during the mortgage crisis.