LEXINGTON, Mass.--(BUSINESS WIRE)--Imprivata®, (NYSE: IMPR), the healthcare IT security company, today announced the pricing of the previously announced underwritten public offering of 4,566,666 shares of its common stock by existing stockholders as identified in the prospectus supplement relating to the offering. In addition, the selling stockholders have granted the underwriters a 30-day option to purchase up to an additional 684,999 shares of common stock from the selling stockholders. All o