A method for visualizing corporate hierarchies is provided. The method comprises receiving a selection of a first company stored in a database and retrieving, from the database, an ultimate parent company of the first company. All other known companies with the same ultimate parent company as the first company are then retrieved from the database. An interactive hierarchical tree diagram is displayed in an interface, wherein the first company, the ultimate parent company, and the other known companies with the same ultimate parent company are displayed as nodes according to parent/child relationships among the companies. Also displayed in the interface, adjacent to the tree diagram, is a collapsible nested tree list comprising the first company, the ultimate parent company, and the other known companies with the same ultimate parent company. The tree diagram and nested tree list have synchronized responses to user input.