TULSA, OK--(Marketwire - October 22, 2009) - AAON, INC. (NASDAQ: AAON), a leading manufacturer of heating and cooling products, announced that for the sixth year, it has been named one of "America's 200 Best Small Companies" by Forbes magazine. AAON is ranked #58 in the November 2, 2009 issue.

Previous listings include:
150th on the Forbes 200 Best Small Companies in 2008
133rd on the Forbes 200 Best Small Companies in 2007
128th on the Forbes 200 Best Small Companies in 2003
51st on the Forbes 200 Best Small Companies in 2002
36th on the Forbes 200 Best Small Companies in 2001

To qualify, companies must have annual revenue between $5 million and $750 million, be publicly traded for at least a year and have a stock price no lower than $5. Rankings are based on earnings growth, sales growth and return on equity in the past 12 months and over five years. Forbes also compares the company's stock performance with that of its industry peers.

Shares of last year's 200 Best Small Companies List members outpaced the Russell by 10 percentage points.

Norm Asbjornson, President & CEO of AAON, said, "We are very honored to be recognized as one of 'America's Best 200 Small Companies.' This ranking reflects the hard work, dedication and commitment of every employee at AAON. Our primary focus at AAON has been, and will continue to be, on delivering consistent and profitable growth to our shareholders."

About AAON

AAON is engaged in the engineering, manufacturing, marketing and sale of air conditioning and heating equipment consisting of standard, semi-custom and custom rooftop units, chillers, packaged mechanical rooms, air handling units, make-up air units, heat recovery units, condensing units and coils. Since the founding of AAON in 1988, AAON has maintained a commitment to design, develop, manufacture and deliver heating and cooling products to perform beyond all expectations and demonstrate the value of AAON to our customers. For more information, please visit www.aaon.com.

Contact Information: Contact: Jerry R. Levine Phone: (914) 244-0292 Fax: (914) 244-0295