SAN DIEGO--(BUSINESS WIRE)--Sequenom, Inc. (NASDAQ:SQNM) today announced that it has filed a preliminary prospectus supplement to an automatically effective shelf registration statement with the Securities and Exchange Commission relating to a proposed public offering of 5,500,000 shares of its common stock. In connection with this offering, Sequenom plans to grant to the underwriters a 30-day option to purchase up to an additional 825,000 shares of common stock. All of the shares are being offered by Sequenom. Sequenom expects the net proceeds from the offering to be used for the development of diagnostic tests for use on its MassARRAY(R) system and other platforms, and for general corporate purposes.