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 34 th Annual Growth Stock Conference on June 11 th at 2:20 pm Eastern Time. The conference will be in Chicago and attendance to the conference is by invitation only. Victoria Holt, 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/blair48/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 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” by utilizing injection molding, computer numerical control (CNC) machining and additive manufacturing to produce custom parts for product designers and engineers worldwide. For more information, visit protolabs.com.