ING Australia Ltd increased its relevant interest in Tap Oil Limited on 28 March 2002, from 8,505,594 ordinary shares (5.50%) to 10,938,081 ordinary shares (7.07%).

PICO Holdings Inc increased its relevant interest in Australian Oil & Gas Corporation Limited on 27 March 2002, from 10,200,724 ordinary shares (21.21%) to 13,397,337 ordinary shares (23.08%).

Golden Words Pty Limited changed its relevant interest in Australian Oil & Gas Corporation Limited on 27 March 2002, from 3,214,939 ordinary shares to 3,963,779 ordinary shares.

FMR Corp changed its relevant interest in Australian Oil & Gas Corporation Limited on 08 April 2002, from 4,629,025 ordinary shares (9.56%) to 4,629,025 ordinary shares (7.97%).

Perpetual Trustees Australia Limited increased its relevant interest in Origin Energy Limited on 08 April 2002, from 32,597,234 ordinary shares (5.04%) to 39,169,880 ordinary shares (6.05%).

Hardman Resources Ltd became a substantial shareholder in Arc Energy NL on 04 April 2002 with a relevant interest in the issued share capital of 15,825,000 ordinary shares (10.37%).

ING Australia increased its relevant interest in Australian Worldwide Exploration Limited on 28 March 2002, from 16,673,968 ordinary shares (7.74%) to 19,473,968 ordinary shares (9.04%).