Director's Dealing

11 June 2015

Thalassa Holdings Ltd

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

("Thalassa" or "the Company")

Director's Dealing

Duncan Soukup, the Chairman of Thalassa, yesterday advised the Company, that on that day, he purchased 50,000 ordinary shares of US$ 0.01 in the Company ("Shares") at a price of 58p per Share.

Following completion of this transaction, Mr Soukup will be interested in 3,162,571 Shares, which represents 12.8% of Thalassa's total voting rights.

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 / Mark Longson +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.