Polypore International (NYSE: PPO) develops, manufactures, and markets highly specialized polymer-based membranes used in separation and filtration processes. The company operates under two business segments: Energy Storage and Separations Media. Polypore serves customers globally with strategically located manufacturing facilities in the major geographic markets of North America, Europe, and Asia. It has manufacturing facilities or sales offices in ten countries serving six continents. For more information visit the company’s Web site at: www.polypore.net

William Blair & Company is a global investment banking and asset management firm committed to building enduring relationships with clients and providing expertise and solutions to meet their evolving needs. An independent and employee-owned firm, William Blair is based in Chicago, and has office locations in 10 cities, including London, New York, Shanghai, and Zurich. For more information on William Blair & Company, visit www.williamblair.com

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