Proto Labs (NYSE: PRLB) is an online and technology-enabled quick-turn manufacturer of custom parts for prototyping and short-run production. Proto Labs provides its solutions to product developers through locations in the United States, the United Kingdom, Germany, Japan, Italy, France, and Spain. Proto Labs utilizes computer numerical control (CNC) machining and injection molding to manufacture custom parts for its customers. For more information visit the company’s Web site at: www.protolabs.com

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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