Limelight Networks Files Registration Statement for Proposed Initial Public Offering

TEMPE, AZ – March 26, 2007 – Limelight Networks, Inc. today announced it has filed a registration statement on Form S-1 with the U.S. Securities and Exchange Commission relating to the proposed initial public offering of its common stock. The shares of common stock to be sold in the offering are expected to be offered by Limelight Networks and certain of its stockholders.

Goldman, Sachs & Co. will act as sole book-runner, Morgan Stanley will act as joint lead manager and Jefferies Broadview, Piper Jaffray and Friedman Billings Ramsey will act as co-managers for the offering. The number of shares to be sold and the price range for the proposed offering have not yet been determined.

A registration statement relating to these securities has been filed with the Securities and Exchange Commission, but has not yet become effective. These securities may not be sold nor may offers to buy be accepted prior to the time the registration statement becomes effective. Further, this press release does not constitute either 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.

The offering will be made only by means of a prospectus. When available, copies of the preliminary prospectus related to the offering can be obtained from the prospectus department of Goldman, Sachs & Co., Attn: Prospectus Department, 85 Broad Street, New York, New York 10004, via fax at 212-902-9316 or via e-mail at prospectus-ny@ny.email.gs.com or from the prospectus department of Morgan Stanley, 180 Varick Street, New York, NY 10014, via telephone at 1-866-718-1649 or via email at prospectus@morganstanley.com.