In what will become one of the year’s most significant bank mergers, Iberiabank has announced that it is merging with Memphis’ First Horizon. The new bank will set up headquarters in Memphis, Tennessee. It will operate under the First Horizon name. Daryl G. Byrd will lead the company as executive chairman of the board of directors, and D. Bryan Jordan will be chief executive officers. Additionally, four people from each company will have a seat on the new board of directors.