SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549-1004 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (date of earliest event reported): February 17, 2004 Ciphergen Biosystems, Inc. (Exact name of Registrant as specified in its charter) Delaware 000-31617 33-059-5156 (State or other jurisdiction of [Commission File (I.R.S. Employer incorporation or organization) Number] Identification Number) 6611 Dumbarton Circle Fremont, CA 94555 (Address of principal executive offices) (510) 505-2100 (Registrant's telephone number, including area code) Item 9. Regulation FD Disclosure (pursuant to "Item 12. Results of Operations and Financial Condition"). A copy of the press release issued February 17, 2004 by the Registrant announcing Financial Results for the Fourth Quarter and Fiscal Year 2003 is filed under Items 9 and 12 of this Current Report on Form 8-K as Exhibit 99.1. SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. Ciphergen Biosystems, Inc. (Registrant) Date: February 17, 2004 By: /s/ William E. Rich --------------------------------- William E. Rich President and Chief Executive Officer EXHIBIT INDEX Exhibit Number Description - ----------- -------------------------------------------------------------- 99.1 Press Release issued by Ciphergen Biosystems, Inc. on February 17, 2004