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 2015 was 822.81p (ex & cum
income).

The Company holds 5,699,614 shares in treasury. In line with the Company's
published policy any re-sale of treasury shares will only take place at a
premium to the prevailing net asset value per share at the time of issue and
therefore the shares held in treasury do not give rise to a potential dilution
to net asset value per share.

For and on behalf of the Board

Frostrow Capital LLP

Secretary

13 May 2015