Interim Results Pre-announcement

17 September 2015

Thalassa Holdings Ltd

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

("Thalassa" or "the Company")

Preliminary announcement of interim report for the 6 months ended 30 June 2015

The Board of Thalassa announces that Thalassa's interim report for the 6 months ended 30 June 2015 will be released on Tuesday 22 September 2015.

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.