Portfolio Update

Intl. Biotechnology Trust PLC
09 June 2006

FOR IMMEDIATE RELEASE                                                  09-Jun-06


To : The London Stock Exchange


International Biotechnology Trust plc


The Board of International Biotechnology Trust plc announces that the top ten
investments as at Wednesday 31 May 2006  were as follows:



            NAME                    % of Gross Assets


Micromet AG                                   7.22
Cambridge Antibody Group                      6.30
AnorMED                                       4.85
Progenics                                     3.25
Liberty                                       2.83
Sunesis                                       2.69
Jerini                                        2.64
Investec                                      2.52
OSI Pharmaceuticals                           2.51
Noven                                         2.40


By Order of the Board
Schroder Investment Management Limited
Secretaries



Enquiries :
International Biotechnology Trust plc          Terry Croft     020 7658 3953




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