Houston, TX August 25, 2008

The Sterling Group, L.P. completes the sale of Hudson Products Holdings, Inc.

The Sterling Group, L.P., a middle-market private equity firm based in Houston, Texas, today announced that they have finalized the sale of Hudson Products Holdings, Inc. to Riverstone Holdings LLC.

Since 1939, Hudson Products ( has designed and manufactured air-cooled heat exchanger equipment to serve the oil, gas, and petrochemical processing industries. Through continuous innovation, Hudson became the pioneer in this field, developing internationally recognized trademarks such as Fin-Fan® Air-Cooled Heat Exchangers, Hy-Fin® Extruded Finned Tubing, and Tuf-Lite® and Tuf-Lite II® FRP Axial Flow Fans for Air coolers, cooling towers, condensers, chillers, and HVAC applications. Hudson’s premier products and reputation for supplying the highest quality, reliability, and service in the industry has resulted in an installed base of over 35,000 ACHE’s and 200,000 fans throughout the world.

“Hudson exemplifies our investment philosophy – to partner with management and employees, focusing on strategic initiatives to grow the business and create value for all the shareholders. Hudson, under the leadership of Chris Yunkun, has focused on these initiatives and improved performance significantly since our acquisition of Hudson in December 2006,” said Kevin Garland, a Partner of The Sterling Group.

The Hudson sale represents the first sale of a portfolio company in Sterling Group Partners II, a $470 million fund controlled by The Sterling Group, L.P.

About The Sterling Group, L.P.
Founded in 1982, The Sterling Group ( is a private equity investment firm that targets controlling interests in basic manufacturing, industrial services and distribution companies. Typical enterprise values of these companies range from $100 million to $500 million. Sterling has sponsored the buyout of over 30 portfolio companies and numerous add-on acquisitions for a total transaction value of approximately $8 billion. Currently, Sterling has $600 million of committed capital under management through two funds, including Sterling Group Partners II, L.P. Current portfolio companies include North American Energy Partners Inc., Propex Inc., Panolam Industries International, Inc., CST Industries, Inc., Roofing Supply Group, LLC, BTEC Turbines LP, and Universal Fiber Systems.

About Riverstone Holdings LLC
Riverstone Holdings LLC, an energy and power-focused private equity firm in 2000, has approximately $14.8 billion under management across six investment funds. Riverstone conducts buyout and growth capital investments in the midstream, exploration & production, oilfield service, power, and renewable sectors of the energy industry. With offices in New York, London and Houston, the firm has committed approximately $8.5 billion to more than 50 investments in North America, Latin America, Europe and Asia. For more information, visit

For additional information, please contact:
The Sterling Group, L.P.
Kevin Garland, Partner
(713) 877-8257