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 10 May 2010 was 171.07p (ex and cum income). For and on behalf of the Board Frostrow Capital LLP Secretary 11 May 2010
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