Share Change For Origin Energy Limited In S&P/ASX 50 Index

Standard & Poor’s will make the following changes in the S&P/ASX 50 Index effective after the close of trading on Wednesday, Dec. 6, 2006:

Origin Energy Limited (Australia, SEDOL: 6214861, GICS Code: 10102010), a member of the S&P/ASX 50 Index, will increase its shares to 850,967,764 as a result of an institutional placement.

Following is a summary of the announced change:

S&P/ASX 50 Index – Dec. 6, 2006, After Market Close
S&P Index	Company Name	New Total	New IWF
S&P/ASX 50	Origin Energy Limited	850,967,764	1.00 (No Change)

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