Union Planters Bank was a United States financial institution and multi-state bank holding corporation headquartered in Memphis, Tennessee prior to being acquired by Regions Financial Corporation. With over $34 billion in assets, Union Planters Bank was the largest bank in Tennessee and among the thirty largest bank holding companies in the United States. Union Planters operated over 760 banking centers in the states of Alabama, Arkansas, Florida, Illinois, Indiana, Iowa, Kentucky, Louisiana, Mississippi, Missouri, Tennessee, and Texas.