ORIGIN ENERGY LIMITED — Director's Dealing 2013

Jun 24, 2013

25 June 2013

Elvis Onyura Advisor - Listings ASX Exchange Centre, 20 Bridge Street Sydney NSW 2000

Dear Elvis

Appendix 3Y - Gordon M Cairns

We refer to the Appendix 3Y lodged today, 25 June 2013 with ASX for release to the market in relation to the sale by a Director of Origin Energy Limited, Mr Gordon M Cairns of 4080 shares.

The Appendix 3Y discloses that the sale of shares occurred on 25 March 2013. Mr Cairns has informed us that he first became aware that an Appendix 3Y relating to the sale had not been lodged when he was checking his records on Sunday 23 June. He immediately sought clarification from the Company and steps were immediately taken by Mr Cairns and the Company to arrange for lodgement of the Appendix 3Y today.

Mr Cairns has advised us that the failure to lodge the Appendix 3Y immediately following the sale was due to an oversight.

The Company confirms that it has in place arrangements with its directors requiring them to notify the Company of an intention to deal in Origin shares and to assist them to notify the market of any dealing in a timely manner. These arrangements are contained in the director's engagement terms and in the Company's securities dealing policy. The procedures are considered appropriate and only failed on this occasion due to an oversight.

Yours sincerely

Andrew Clarke Company Secretary