Net Asset Value(s)

REVERSAL OF THE AMENDMENT TO ADD CUM INCOME NAV PRICE ANNOUNCEMENT RELEASED 
(9C24) on 01/06/2012 17:25:04

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 31 May 2012 was 261.88p (ex income)
262.06p (cum income).

For and on behalf of the Board

Frostrow Capital LLP

Secretary

1 June 2012