Press Release

Harmonic Announces Offering of 12,900,000 Shares of Common Stock

October 23, 2007

SUNNYVALE, Calif.--(BUSINESS WIRE)--Oct. 23, 2007--Harmonic Inc. (Nasdaq:HLIT) today announced that it plans to offer, subject to market and other conditions, 12,900,000 shares of its common stock pursuant to an effective shelf registration statement on file with the Securities and Exchange Commission. Harmonic also expects to grant to the underwriters an over-allotment option to purchase up to an additional 1,935,000 shares of common stock in connection with the offering. All of the shares are being offered by Harmonic.

The sole book-running manager of the offering is Merrill Lynch & Co., the co-lead manager of the offering is Lehman Brothers and the co-managers of the offering are Jefferies & Company and Merriman Curhan Ford & Co. When available, a copy of the prospectus relating to the offering may be obtained from Merrill Lynch at 4 World Financial Center, 250 Vesey Street, New York, NY 10281, or from the offices of any of the co-managers identified above.

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 jurisdiction in which such offer, solicitation or sale would be unlawful prior to the registration or qualification under the securities laws of any such jurisdiction.

Forward-Looking Statements

This press release contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934, including statements related to Harmonic's expectations as to the completion, timing and size of any public offering. These statements are subject to risks and uncertainties that could cause actual results and events to differ materially from those anticipated, including those more fully described in Harmonic's filings with the Securities and Exchange Commission, including its annual report on Form 10-K, its quarterly reports on Form 10-Q and its current reports on Form 8-K. Harmonic does not undertake to update any forward-looking statements.

EDITOR'S NOTE -- Product and company names used herein are trademarks or registered trademarks of their respective owners.


    CONTACT: Harmonic Inc.
             Chief Financial Officer
             Robin N. Dickson, 408-542-2500
             or
             StreetConnect
             Investor Relations
             Michael Newman, 408-542-2760

    SOURCE: Harmonic Inc.