Proto Labs, Inc. (NYSE: PRLB), a leading online and technology-enabled quick-turn manufacturer, today announced that it will be presenting at the William Blair & Company 32nd Annual Growth Stock Conference on June 12th at 2:50pm. The conference will be in Chicago and attendance to the conference is by invitation only.

Brad Cleveland, President and CEO, and Jack Judd, CFO, will review the company’s current business developments and recent financial results. To hear both the live and the archived presentation go to the link: http://wsw.com/webcast/blair44/prlb/. The Company will offer an audio webcast of its presentation under the investors section of the Company’s website, www.protolabs.com, for 30 days.

About Proto Labs, Inc.

Proto Labs, Inc. is a leading online and technology-enabled quick-turn manufacturer of custom parts for prototyping and short-run production. Proto Labs provides “Real Parts, Really Fast” to product developers worldwide. Proto Labs utilizes computer numerical control (CNC) machining and injection molding to manufacture custom parts for our customers. For more information, visit www.protolabs.com.