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 15 July 2010 was 156.73p (ex and cum
income).

For and on behalf of the Board

Frostrow Capital LLP

Secretary

16 July 2010