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 20 May 2013 was 397.42p (ex & cum
income).

For and on behalf of the Board

Frostrow Capital LLP

Secretary

21 May 2013