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): JANUARY 8, 2001 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 NUMBER] (I.R.S. EMPLOYER INCORPORATION OR ORGANIZATION) IDENTIFICATION NUMBER) 6611 DUMBARTON CIRCLE FREMONT, CA 94555 (ADDRESS OF PRINCIPAL EXECUTIVE OFFICES) (510) 505-2100 (REGISTRANT'S TELEPHONE NUMBER, INCLUDING AREA CODE) ITEM 5. OTHER EVENTS On January 8, 2001, Ciphergen Biosystems, Inc. issued a press release announcing that its preliminary revenue forecast for the fourth quarter ending December 31, 2000, will be approximately $3 million, or approximately 10-15% below previous company expectations. The press release is attached as Exhibit 99.2 to this Form 8-K. ITEM 7. FINANCIAL STATEMENTS AND EXHIBITS (c) Exhibits. EXHIBIT NUMBER DESCRIPTION - ----------------- ------------------------------------------------------------------- 99.2 Ciphergen Biosystems, Inc. Press Release issued January 8, 2001. 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: January 8, 2001 By: /s/ William Rich --------------------------------------- William E. Rich President and Chief Executive Officer -2- EXHIBIT INDEX EXHIBIT NUMBER DESCRIPTION - ----------------- ------------------------------------------------------------------- 99.2 Ciphergen Biosystems, Inc. Press Release issued January 8, 2001. -3-