(FUEL) Prices Initial Public Offering

REDWOOD CITY, Calif., Sept. 20, 2013 — Rocket Fuel Inc. today announced the pricing of its initial public offering of 4,000,000 shares of common stock at a price to the public of $29.00 per share. All of the shares are being offered by Rocket Fuel. The shares are expected to begin trading on the NASDAQ Global Select Market on September 20, 2013 under the symbol “FUEL”. In addition, the underwriters have a 30-day option to purchase up to 600,000 additional shares of common stock at the initial public offering price from certain existing stockholders of Rocket Fuel to cover over-allotments, if any. None of Rocket Fuel’s executive officers are participating in the offering as selling stockholders.

Credit Suisse and Citigroup are acting as joint bookrunners for the offering. Needham & Company, Oppenheimer & Co., Piper Jaffray, BMO Capital Markets, and LUMA Securities are acting as co-managers.

A registration statement relating to these securities was declared effective by the Securities and Exchange Commission on September 19, 2013. The offering will be made only by means of a prospectus. A copy of the prospectus may be obtained by mail from the offices of Credit Suisse Securities (USA) LLC, Attention: Prospectus Department, One Madison Avenue, New York, New York, 10010, by calling (800) 221-1037, or by emailing a request to newyork.prospectus@credit-suisse.com; or Citigroup Global Markets Inc. c/o Broadridge Financial Solutions, 1155 Long Island Ave., Edgewood, NY 11717, by calling (800) 831-9146, or by emailing batprospectusdept@citi.com.

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

CONTACT: Investor Relations Contact:

         Alex Wellins
         The Blueshirt Group
         415-217-5861
         alex@blueshirtgroup.com

         Media Relations Contact:

         Jessica Cheney
         Atomic
         415-593-1400, ext. 1688
         rocketfuel@atomicpr.com