 BOSTON--BUSINESS WIRE--908 Devices Inc., a pioneer of purpose-built handheld and desktop mass spec devices for chemical and biomolecular analysis, today announced the closing of its upsized initial public offering of shares of its common stock, with 7,475,000 shares offered and sold by the Company at a public offering price of 20.00 per share, which includes the full exercise of the underwriters option to purchase an additional 975,000 shares of common stock from the Company. The shares beg 