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Investors in Proto Labs (NYSE:PRLB) have unfortunately lost 72% over the last three years [Yahoo! Finance]

Proto Labs, Inc. Common stock  (PRLB) 
Last proto labs, inc. common stock earnings: 4/30 06:00 am Check Earnings Report
PDF So take a moment to sympathize with the long term shareholders of Proto Labs, Inc. NYSE:PRLB ), who have seen the share price tank a massive 72% over a three year period [Read more]