Nanosphere Prices Public Offering of Common Stock, 13.64M Shares Priced at $2.20 (NSPH)

Nanosphere NSPH, a leader in the development and commercialization of advanced molecular diagnostics systems, today announced the pricing of its previously announced underwritten public offering of 13,640,000 shares of its common stock at a public offering price of $2.20 per share. In connection with the offering, the Company has also granted the underwriters a 30-day option to purchase up to an additional 2,046,000 shares of common stock to cover over-allotments, if any. Piper Jaffray & Co. is acting as the sole book-running manager and Roth Capital Partners, LLC is acting as co-manager for the offering. Net proceeds from the sale of the shares after underwriting discounts and commissions and other offering expenses are expected to be approximately $27.9 million. If the underwriters exercise their over-allotment option in full, net proceeds from the offering will be approximately $32.1 million. The offering is subject to customary closing conditions and is expected to close on Friday, May 13, 2011.