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 4 June 2010 was 167.84p (ex and cum income). For and on behalf of the Board Frostrow Capital LLP Secretary 7 June 2010
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