Transaction in Own Shares

This announcement contains inside information for the purposes of Article 7 of EU Regulation 596/2014.

28 November 2023

Gattaca plc

("Gattaca" or the "Company")

Transaction in Own Shares

The Company announces that in accordance with the authority given to the Company by its shareholders at its FY22 annual general meeting and pursuant to the Company's share buy-back announced on 13 November 2023, it has purchased for cancellation through Liberum Capital Limited, the following ordinary shares in the capital of the Company (the "Ordinary Shares"):

Details of the individual transactions are set out below.

Following cancellation of the above Ordinary Shares, the Company will have 31,516,870 Ordinary Shares in issue. No Ordinary Shares are held in treasury.

This number represents the total voting rights in the Company and may be used by shareholders as the denominator for the calculations by which they can determine if they are required to notify their interest in, or a change to their interest in the Company under the Financial Conduct Authority's Disclosure Guidance and Transparency Rules.

This purchase of Ordinary Shares completes the Company's share buy-back, originally launched on 21 August 2023, having returned approximately £500k to the Company's shareholders over the course of the programme at a volume-weighted average price of 118.3p.

For further information please contact: