Substantial ShareholderUpdate

Roc Oil Company Limited
04 May 2007


3 May 2007

                    Roc Oil Company Limited ('The Company')

                         Substantial Shareholder Notice

The Company has been notified of the following change in substantial
shareholding:

-    As at 16 March 2007, Merrill Lynch & Co Inc and its affiliates held 
18,929,946 fully paid ordinary shares in the Company, representing 6.35% of the
total issued share capital of the Company.

For further information please contact:
Dr John Doran on
Tel: [phone]
Fax: [phone]
Email: [e-mail]
Or visit ROC's website: www.rocoil.com.au

Dr Kevin Hird
General Manager Business Development
Tel: [phone]
Fax: [phone]
Email: [e-mail]

Nick Lambert
Bell Pottinger Corporate & Financial
Tel: [phone]




                      This information is provided by RNS
            The company news service from the London Stock Exchange