Addenda ▼

ADDENDUM
(TO PROSPECTUS DATED DECEMBER 19, 2002 AND
PROSPECTUS SUPPLEMENT DATED MAY 20, 2003)
--------------------------------------------------------------------------------
[UBS LOGO]
                                  $300,000,000
                         UBS PREFERRED FUNDING TRUST IV
             FLOATING RATE NONCUMULATIVE TRUST PREFERRED SECURITIES
                     REPRESENTING A CORRESPONDING AMOUNT OF
            FLOATING RATE NONCUMULATIVE COMPANY PREFERRED SECURITIES
                                       OF
                      UBS PREFERRED FUNDING COMPANY LLC IV
   . . .

                                    Addendum


This Addendum is made the 23rd day of April 2002 by and between:

     (1)  B  Omentum  Consulting  AB, a company  incorporated  under the laws of
          Sweden  with  corp.  reg.  no.  556245-3778,  Klovervagen  6,  133  36
          Saltsjobaden,  Sweden  (hereinafter  referred to as "the Consultant");
          and

     (2)  OXiGENE  EUROPE  AB, a company  incorporated  under the laws of Sweden
          with corp. reg. no. 556503-6638.  Box 55610, 102 14 Stockholm,  Sweden
          (hereinafter referred to as " . . .