HOUSTON, Sept. 23, 2010 /PRNewswire-FirstCall/ — Kraton Performance Polymers, Inc. (NYSE: KRA), a leading global producer of styrenic block copolymers, announced today the pricing of the secondary public offering of 8,000,000 shares of its common stock held by affiliates of TPG Capital, L.P. and J.P. Morgan Partners, LLC at a price of $26.50 per share. the underwriters will have a 30-day option to purchase up to an additional 1,200,000 shares of common stock from the affiliates of TPG Capital, L.P. and J.P. Morgan Partners, LLC at the public offering price less the underwriting discount to cover over-allotments, if any.

The Company will not receive any proceeds from the offering, and the total number of shares of common stock outstanding will not change as a result of this offering.

Credit Suisse Securities (USA) LLC, BofA Merrill Lynch, Morgan Stanley & Co. Incorporated and Oppenheimer & Co. Inc. are the bookrunning managers of the offering.

A registration statement relating to these securities has been declared effective by the Securities and Exchange Commission. the offering will be made only by means of the written prospectus forming part of the effective registration statement. a copy of the final prospectus relating to the offering, when available, may be obtained from: Credit Suisse Securities (USA) LLC, Attn: Credit Suisse Prospectus Department, One Madison Avenue, New York, NY 10010, Phone: 1-800-221-1037; BofA Merrill Lynch, 4 World Financial Center, New York, NY 10080, Attn: Prospectus Department or email [email protected]; KeyBanc Capital Markets, Attn: Prospectus Delivery Department, 127 Public Square, 6th Floor, Cleveland, OH 44114 or by calling (216) 689-0421; Morgan Stanley & Co. Incorporated, Attn: Prospectus Department, 180 Varick Street, New York, NY 10014 or [email protected]; Oppenheimer & Co. Inc. Attn: Syndicate Prospectus Department, 300 Madison Ave., 4th Floor, New York, New York 10017, Phone (212) 667-8563, Fax (212) 667-6141, or [email protected]; or UBS Securities LLC, Attn: Prospectus Department, 299 Park Avenue, New York, NY 10171.

This press release shall not constitute an offer to sell or a solicitation of an offer to buy, nor shall there be any sale of these securities in any state or jurisdiction in which such an offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such state or jurisdiction.