SAN FRANCISCO, Jan. 22, 2014 /PRNewswire/ -- Nektar Therapeutics (Nasdaq: NKTR ) ("Nektar") today announced the pricing of its previously announced underwritten public offering of 8,500,000 shares of its common stock at a public offering price of $12.75 per share. In connection with this offering, Nektar has also granted to the underwriters a 30-day option to purchase up to an additional 1,275,000 shares of common stock.