Net Asset Value(s)

THE BIOTECH GROWTH TRUST PLC NET ASSET VALUE The estimated un-audited net asset value, calculated in accordance with the guidelines of the Association of Investment Companies, for The Biotech Growth Trust PLC at the close of business on 22 May 2008 was 104.77p (ex income). For and on behalf of the Board Frostrow Capital LLP Secretary 23 May 2008
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