Placid Oil Company Turkey

(20.09.1988)

Mobil Exploration Mediterranean Inc.

(05.04.1990)

MOL Hungarian Oil and Gas Plc.

(19.12.2003)

Madison Oil Turkey Inc.

(27.12.2004)

Burren Energy Egypt Ltd.

(18.07.2006)

Edison International SpA

(07.08.2006)

Dana Petroleum (E&P) Limited

(18.03.2010)