In 2005, Cinergy announced a friendly acquisition by the larger Charlotte, North Carolina-based Duke Energy. The acquisition was completed on April 3, 2006. The combined company retains the Duke Energy name. Until the acquisition, Cinergy still operated under the names of the three local utilities (e.g., Cinergy/CG&E in Cincinnati); since the acquisition, the names of the three former Cinergy utilities and Duke Power, the former Duke Energy utility subsidiary, have been phased out, although signs bearing the former logos still remain at some substations. Duke, in partnership with railway company CSX, continued to host the annual train display in Cinergy's former headquarters until 2011, when the display was donated to the Cincinnati Museum Center at Union Terminal.