Block Listing Six Monthly Return

Name of applicant:

GATTACA PLC

Name of scheme:

Gattaca plc: Long-Term Incentive Plan, Deferred Share Bonus Plan, Enterprise Management Incentive Plan and Share Incentive Plan

Period of return:

From:

3 December 2016

To:

30 September 2018

Number and class of securities not issued under the scheme from previous return:

109,100

The amount by which the block scheme(s) has been increased since the date of the last return (if any increase has been applied for):

600,000

Number of securities issued/allotted under the scheme during the period:

709,100

Balance of unallotted securities under the scheme at the end of the period:

0

Number and class of securities originally admitted and the date of submission:

25,000 ordinary shares - 4 December 2006

93,420 ordinary shares - 11 June 2007

75,000 ordinary shares - 4 June 2009

100,000 ordinary shares - 13 January 2011

200,000 ordinary shares - 19 February 2013

500,000 ordinary shares - 22 January 2014

500,000 ordinary shares - 9 April 2014

600,000 ordinary shares - 13 December 2016

Total number of securities in issue at the end of the period

31,757,794

Name of contact:

Katie Selves, Company Secretary, Gattaca plc

Telephone number of contact:

1450 Parkway, Solent Business Park, Fareham, Hampshire, PO15 7AF

01489 89 89 89