ROC is one of Australia s leading independent oil and gas companies with approximately 298.9 million shares on issue and a market capitalisation around $890 million as at 31 March 2008. ROC is incorporated in Australia and listed on the Australian Stock Exchange in 1999 and the Alternative Investment Market of the London Stock Exchange in 2004.The Companys assets are grouped into four main regions: Australia , China , Africa and UK . ROC acquired a 24.5% operated interest in the offshore Zhao Dong Block in 2006 via the acquisition of 100% of the shares of Apache China Corporation LDC. The Block, located in shallow water close to the shore in Bohai Bay , contains two producing oil fields, C and D , and part of an undeveloped oil field, C4.