National Headquarters and Midwest Regional Trading Center (Carmel, Indiana)

ACES' national headquarters is located in Carmel, Indiana. The Carmel office also houses ACES' Midwest Regional Trading Center (RTC). ACES has three other RTCs in North Carolina, Minnesota, and Arizona.

East Regional Trading Center (Raleigh, North Carolina)

ACES' East Regional Trading Center (RTC) opened in December 2001, in Cary, North Carolina. In the summer of 2011, the East RTC relocated to Raleigh. The new building in Raleigh provides additional space for future expansion of the East RTC.

North Regional Trading Center (Maple Grove, Minnesota)

ACES' North Regional Trading Center (RTC) is located in Maple Grove, Minnesota and is housed within the same building as Great River Energy's headquarters. Great River Energy is one of ACES' Members. The eighth largest city in Minnesota, Maple Grove serves as the retail, cultural, and medical center of the northwest region of the Minneapolis-Saint Paul metropolitan area.

West Regional Trading Center (Benson, Arizona)

ACES' West Regional Trading Center (RTC) is located in Benson, Arizona, and is housed within the same building as Arizona Electric Power Cooperative's (AEPCO) headquarters. AEPCO is one of ACES' Members. Benson served as the rail shipping point for the booming town of Tombstone when the Southern Pacific Railroad came through southern Arizona in 1880. Today, the city is best known as the gateway to Kartchner Caverns State Park.