AAON, Inc. engages in the engineering, manufacturing, marketing and sale of air conditioning and heating equipment. It operates through the following segments: Units, Parts-External, Parts-Internal, and Other. Read More Its products include air handling units, self contained units, packaged rooftop units, geothermal heat units, controls, and coils. The company was founded by Norman H. Asbjornson on August 18, 1987 and is headquartered in Tulsa, OK. The listed name for AAON is AAON, Inc. Common Stock.