Roc Oil Company Limited 17 February 2006 17 February 2006 Roc Oil Company Limited ("The Company") (ABN 32 075 965 856) Substantial Shareholder Notice The Company has been notified of the following initial substantial shareholding: - As at 15 February 2006, Merrill Lynch (Australia) Pty Limited and its affiliates held 11,338,421 fully paid ordinary shares in the Company, representing 5.25% of the total issued share capital of the Company. For further information please contact: Dr John Doran Tel: +61-2-8356-2000 Fax: +61-2-9380-2635 E-mail: jdoran@rocoil.com.au Or visit ROC's website: www.rocoil.com.au Dr Kevin Hird General Manager Business Development Tel: +44 (0)207 586 7935 Fax: +44 (0)207 722 3919 Email: khird@rocoil.com.au Nick Lambert Bell Pottinger Corporate & Financial Tel: +44 (0)207 861 3232 This information is provided by RNS The company news service from the London Stock Exchange