Group American Electric Power Company, Inc.

Ohio Power Co. engages in the generation, transmission, and distribution of electric power to retail customers. It also supplies and markets electric power at wholesale to other electric utility companies, municipalities, and other market participants. The principal industries served by the company include: primary metals, chemicals and allied products, health services, electronic machinery, petroleum refining, and rubber and plastic products. The company was founded in 1907 and is headquartered in Columbus, OH.

Appalachian Power Co. engages in the generation, transmission and distribution of electric power to retail customers in the south-western portion of Virginia. It also supplies and markets electric power at wholesale to electric utility companies, municipalities and other market participants. The company was founded in 1926 and is headquartered in Columbus, OH.

AEP Texas, Inc. engages in the transmission and distribution of electric power. It focuses on petroleum and coal products manufacturing, chemical manufacturing, oil and gas extraction, pipeline transportation, and support activities for mining. The company was founded in 1925 and is headquartered in Columbus, OH.

AEP Transmission Co. LLC owns and operates power line transmissions. The company was founded on February 1, 2006 and is headquartered in Columbus, OH.

American Electric Power Service Corp. provides management and engineering solutions. It offers engineering, technical, and drafting services. The company was founded in 1937 and is headquartered in Columbus, OH.

Public Service Company of Oklahoma engages in the generation, transmission, and distribution of electric power to retail customers. It also supplies and markets electric power at wholesale to other electric utility companies, municipalities, rural electric cooperatives and other market participants. The company was founded by Frederick William Insull on May 29, 1913 and is headquartered in Tulsa, OK.

Kentucky Power Co. engages in the generation, transmission and distribution of electric power. It serves retail customers in eastern Kentucky. It provides delivering electricity and custom energy solutions. The company was founded on July 21, 1919 and is headquartered in Columbus, OH.

Indiana Michigan Power Co. engages in the business of generation, transmission, and distribution of electric power. The firm is also involved in supplying and marketing electric power at wholesale to other electric utilities, municipalities, and rural electric cooperatives. The company was founded on May 11, 1907 and is headquartered in Columbus, OH.

AEP Energy, Inc. retails and supplies natural gas and electricity. It provides to the residential consumers, industrial facilities, and commercial entities. The company was founded by Guy H. Morgan and Aaron D. Rasty in 2002 and is headquartered in Chicago, IL.

Southwestern Electric Power Co. engages in the business of generating, transmitting and distributing electric power. The firm is also involved in manufacturing petroleum, coal, food, paper, and chemicals; and oil and gas extraction. The company was founded in 1912 and is headquartered in Columbus, OH.