424B3 1 a2117683z424b3.htm 424B3
Filed Pursuant to Rule 424(b)(3)
Registration No. 333-106434		   PROSPECTUS SUPPLEMENT
To Prospectus Dated August 5, 2003

Ciphergen Biosystems, Inc.

1,250,000 Shares
of
Common Stock

        This Prospectus Supplement, together with the Prospectus dated August 5, 2003 listed above, is to be used by certain holders of the above-referenced shares of common stock or by their transferees, pledges or other successors in interest in connection with the offer and sale of the above-referenced shares of common stock.

        The table captioned "Selling Stockholders" commencing on page 10 of the Prospectus is hereby amended to delete the selling stockholder, "LumiCyte, Inc.," and to add the following selling stockholders.

 
   Shares
Beneficially
Owned
Prior
to Offering
    
   Shares Beneficially Owned
After Offering (1)
 
   Number of
Shares
Being
Offered
Name of Selling Stockholder
  Number
   Percent
Redleaf Group, Inc.   408,101   408,101   0   *
TLH&M, LLC   3,177   3,177   0   *
GCWF Investment Partners II   2,056   2,056   0   *
The UCLA Foundation   934   934   0   *
Michael G. and Olwen Page   6,058   4,112   1,946   *
TD Origen Capital Fund, L.P.   74,774   74,774   0   *
TD Javelin Capital Fund II, L.P.   74,774   74,774   0   *
TD Lighthouse Capital Fund, L.P.   91,458   91,458   0   *
Tullis-Dickerson Capital Focus II, L.P.   58,090   58,090   0   *
Caduceus Private Investments, L.P.   86,721   86,721   0   *
OrbiMed Associates, LLC   1,770   1,770   0   *
UBS Juniper Crossover Fund, L.L.C.   42,363   42,363   0   *
Matthew J. Montini and Julie A. Montini, or their successors, as Trustees of the Montini Family 1997 Revocable Trust dated 9/8/97   11,216   11,216   0   *
Scherbarth Family Partners, FLP   26,171   26,171   0   *
George Hoyem, Trustee of the Hoyem Family Trust U/T/A dated 7/27/2000   934   934   0   *
Dean Witter Reynolds, Inc. Cust. for Rex S. Jackson IRA Rollover dtd 1/23/01   934   934   0   *
Robert F. Carey   3,738   3,738   0   *
Les M. Huhn and Dorothy S. Huhn, Trustees of the Huhn Family Trust U/T/A dated 6/30/99   1,869   1,869   0   *
Kratos Analytical Limited   6,797   6,797   0   *
LumiCyte, Inc.   333,011   333,011   0   *
(1)
Based on 28,845,812 shares outstanding as of August 27, 2003.

(2)
The number of shares owned by any selling stockholder after the offering assumes disposition by such selling stockholder of all the shares of Ciphergen common stock being offered and that such selling stockholder does not acquire any additional shares.

*
Less than 1%

        This Prospectus Supplement should be read in conjunction with the Prospectus, and is hereby qualified in its entirety by reference to the Prospectus, except to the extent that the information contained herein supersedes the information contained in the Prospectus.

The date of this Prospectus Supplement is August 29, 2003.