ROCKVILLE, Md.--(BUSINESS WIRE)--Human Genome Sciences, Inc. (Nasdaq:HGSI) today announced the pricing of its underwritten public offering of 15,500,000 newly issued shares of its common stock at a price to the public of $26.75 per share. The size of the offering was increased from the originally announced 12,500,000 shares. The Company also granted the underwriters a 30-day option to purchase up to an additional 2,325,000 shares of the Company’s common stock. The offering is expected to close on December 8, 2009, subject to customary closing conditions. The Company anticipates net proceeds from the offering of approximately $397 million.