<PAGE>
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): OCTOBER 30, 2000
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)
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ITEM 5. OTHER EVENTS
On October 30, 2000, Ciphergen Biosystems, Inc. issued a press release
announcing that Ciphergen Biosystems, Inc. was filing an amended complaint in
its lawsuit against Molecular Analytical Systems, Inc. and LumiCyte, Inc. The
press release is attached as Exhibit 99.1 to this Form 8-K.
On October 30, 2000, Molecular Analytical Systems, Inc. and LumiCyte, Inc.
filed a cross complaint against Ciphergen Biosystems, Inc.
ITEM 7. FINANCIAL STATEMENTS AND EXHIBITS
(c) Exhibits.
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<CAPTION>
EXHIBIT
NUMBER DESCRIPTION
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<C> <S>
99.1 Ciphergen Biosystems, Inc. Press Release issued October 30, 2000.
</TABLE>
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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: November 8, 2000 BY: /s/ William E. Rich
-------------------------------------
William E. Rich
President and Chief Executive Officer
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EXHIBIT INDEX
<TABLE>
<CAPTION>
EXHIBIT
NUMBER DESCRIPTION
------------ -----------------------------------------------------------------
<C> <S>
99.1 Ciphergen Biosystems, Inc. Press Release, issued October 30, 2000
</TABLE>
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