Director's Dealing

5 May 2016

Thalassa Holdings Ltd

(Reuters: THAL.L, Bloomberg: THAL:LN)

("Thalassa" or "the Company")

Director's Dealing

Duncan Soukup, the Chairman of Thalassa, advised the Company that on 4 May 2016 he bought 25,000 shares in the Company at a price of 44p per share.

Following completion of this transaction, Mr Soukup will be interested in 3,562,571 shares in the Company, which will represent 15.1% of the issued share capital of Thalassa, based on 23,608,865 shares in issue (excluding shares held in treasury).

Investor Enquiries:

Thalassa Holdings Ltd

Duncan Soukup, Chairman +33 (0)6 78 63 26 89

WH Ireland Limited (Nominated Adviser and Broker)

Chris Fielding, Head of Corporate Finance +44 (0)207 220 1650

Press Enquiries:

Square1 Consulting (Public Relations)

David Bick +44 (0)207 929 5599

www.thalassaholdingsltd.com

Notes to Editor:

Thalassa Holdings Ltd, incorporated and registered in the BVI and quoted on AIM, is a holding company with subsidiaries in the Energy Services and Defence and Homeland Security Industries, with a focus on marine seismic operations.