MIRVAC GROUP — Regulatory Filings 2011

Sep 20, 2011

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THIS NOTICE APPLIES TO HOLDERS OF INSTALMENT RECEIPTS (PREVIOUSLY KNOWN AS WESTPAC OFFICE TRUST INSTALMENT RECEIPTS) ONLY

21 September 2011

CLOSURE OF THE SEPTEMBER 2011 INSTALMENT RECEIPT CONVERSION PERIOD

On 26 August 2011, Mirvac Group (“Mirvac”) [ASX: MGR] announced the commencement of the September 2011 instalment receipt conversion period. The conversion period will end at 5.00pm (Sydney time) on 23 September 2011.

The next opportunity for instalment receipt holders to convert by early repayment will be in December 2011.

Second Instalment Due and Payable

Instalment Receipt holders registered on 19 August 2011 were sent a notice on 26 August 2011 advising that the Second Instalment is due and payable by 5.00pm (Sydney time) on 1 November 2011.

Instalment Receipt holders will continue to be able to sell their investment on or before 27 September 2011 by selling the underlying Mirvac securities which are traded on the ASX under the ASX code of “MGR” and paying all the instalment debt from the sale proceeds.

From 30 September 2011 (the “Record Date”) there will be no further trading permitted for the holders of Instalment Receipts and the register will be closed for the processing of transfers until after the Second Instalment payment date.

Failure to pay the Second Instalment by the due date may result in Westpac Custodian Nominees Limited, the Security Trustee, selling the underlying Mirvac Securities and repaying both the Second and Final Instalment. If there is a shortfall between the Instalments and the sale proceeds, the Security Trustee may recover the shortfall amount from the Instalment Receipt holder, plus may also charge interest and outgoings.

If you choose to convert your Instalment Receipts during this conversion period and pay the instalment debt of $0.83752 per Instalment Receipt you hold, you will receive fully paid Mirvac securities and your obligations with respect to your Instalment Receipts will be extinguished (that is, you would have paid both the Second and Final Instalments).

For more information, please contact:

Investor Enquiries: Media Enquiries: Jessica O’Brien Rosalie Duff Group Investor Relations Manager Group Communications Manager +61 2 9080 8458 +61 2 9080 8397

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