Delek Drilling is a limited partnership dealing in oil and gas exploration and production. Overseas operations are carried out by subsidiaries of Delek Energy Systems (DES) which concentrate mainly on the following areas of operations: (1) Delek Energy (Vietnam) focuses on oil and gas exploration in Vietnam (in July 2009 Delek Drilling sold its equity in its W12 Block in Vietnam to its partners Premier Oil; (2) On February 11, 2008, DES closed the acquisition of 100% of the capital of Elk Resources, which is a private company registered in the U.S., which produces and sells oil and gas, develops existing oil and gas assets and engages in low-risk oil and gas exploration; (3) DES owns 83.49% of the rights in AriesOne; (4) 29.14% of the capital of Matra Petroleum which owns the Sokolovskoe oil discovery in Russia; (5) 25.12% of the capital of Viking Oil and Gas International Ltd. (“VOGIL”), a private company which owns two oil tankers. Delek International also holds 1.45% of the issued and paid up capital of Nexus Energy a public company for oil and gas exploration and production in Australia. It should be noted that a wholly-owned subsidiary of VOGIL holds another approximately 13% of the shares of Nexus. Delek Energy (CEO Gideon Tadmor) holds directly 49.8% of Delek Drilling and 38.1% of Avner. In December 2009, the Pisgot Investment House became a stakeholder in Delek Energy after it purchased 259 thousand shares at a price of 913.5 shekels a share so that they increased their holding in Delek Energy to 5.17%