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 12 May 2010 was 178.31p (ex and cum income). For and on behalf of the Board Frostrow Capital LLP Secretary 13 May 2010
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