Proto Labs, a manufacturer of quick-turn, low-volume molded custom parts for prototyping, raised $68.8 million by offering 4.3 million shares at $16.00, above the range of $13.00 to $15.00. The market cap is now $393.1 million, up from a proposed $342.3 million valuation. On Friday, Proto Labs will begin trading on the NYSE under the symbol PRLB. Jefferies and Piper Jaffray were the bookrunners on the deal.
