SANTOS LIMITED — Regulatory Filings 2012

Sep 17, 2012

==> picture [125 x 39] intentionally omitted <==

18 September 2012

Richard Willcock Group Company Secretary & General Counsel

Leighton Holdings Limited ABN 57 004 482 982

472 Pacific Highway St Leonards NSW 2065 Australia PO Box 1002 Crows Nest NSW 1585, Australia www.leighton.com.au T (02) 9925 6666 F (02) 9925 6005

ASX Market Announcements Australian Securities Exchange Limited Level 4 20 Bridge Street SYDNEY NSW 2000

RE: Thiess wins Santos GLNG tunnelling contract

Please find attached a copy of a media release to be issued today by Thiess Pty Ltd, a wholly owned subsidiary of Leighton Holdings Limited.

Yours faithfully,

R. Willcock

Group Company Secretary & General Counsel

Thiess Pty Ltd A.C.N. 010 221 486 A.B.N. 87 010 221 486

MEDIA RELEASE

18 September 2012

==> picture [71 x 67] intentionally omitted <==

Thiess Centre 179 Grey Street South Bank QLD 4101

Locked Bag 2009 South Brisbane QLD 4101 Australia Telephone (07) 3002 9000 Facsimile (07) 3002 9009

THIESS WINS SANTOS GLNG TUNNELLING CONTRACT

Thiess has been awarded a $134 million contract by Saipem Australia Pty Ltd, the Australian company of the worldwide pipeline specialist Saipem, to construct a tunnel for the Santos GLNG Project in Gladstone.

Thiess will construct a 4.3 kilometre tunnel under a section of water known as The Narrows to connect the mainland near Gladstone to the Santos GLNG LNG Plant on Curtis Island.

The 3.4 metre internal diameter, segmentally lined tunnel will serve as the conduit for the Santos GLNG gas transmission line.

Thiess Managing Director Bruce Munro said the contract with Saipem is a strong endorsement of the company’s market-leading tunnelling expertise.

“Thiess’ versatile tunnelling capability is already being deployed in the LNG sector in Western Australia and we’re excited to now bring our tunnelling expertise to Queensland’s LNG industry,” Mr Munro said.

“LNG is the clean energy of tomorrow and this contract dovetails with our objective to become an integral part of the industry’s development.”

Thiess is currently executing contracts in the LNG industry in the diverse areas of worker accommodation, site preparation, tank construction, gas processing facilities and tunnels in both Western Australia and Queensland.

Santos GLNG Project is a joint venture between one of Australia’s leading gas producers and three of the world’s largest energy companies, PETRONAS, Total and KOGAS. Thiess will construct the tunnel using a tunnel boring machine (TBM) and the concrete segments used to line the tunnel will be cast onsite.

Mobilisation is expected to commence onsite in September preparing for tunnelling activities to commence later in the year.

ENDS

Media contact: Alex Smith 07 3002 9673, 0412 796 183 or email asmith1@thiess.com.au.

With an annual turnover of $6.5 billion and 20,000 employees, Thiess is Australia’s leading and most trusted construction, mining and services contractor, and a wholly owned subsidiary of Leighton Holdings Limited.