Proto Labs Announces Exercise in Full of Over-Allotment Option and Completion of Initial Public Offering

Proto Labs, Inc.

today announced the completion of its initial public offering of 4,945,000 shares of common stock, including 645,000 shares sold pursuant to the full exercise of an over-allotment option previously granted to the underwriters. All shares were offered by Proto Labs at a price to the public of $16.00 per share. The gross proceeds to Proto Labs from this offering were approximately $79.1 million, before deducting the underwriting discounts and commissions and other estimated offering expenses payable by Proto Labs.