20 September 2011 Company Announcements Office Australian Securities Exchange Limited Level 4 20 Bridge Street SYDNEY NSW 2000 RE: Thiess wins Fortescue Pilbara Iron Ore mine 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, A.J. MOIR Company Secretary Thiess Pty Ltd A.C.N. 010 221 486 MEDIA RELEASE A.B.N. 87 010 221 486 Thiess Centre 179 Grey Street South Bank QLD 4101 20 September 2011 Locked Bag 2009 South Brisbane QLD 4101 Australia Telephone (07) 3002 9000 Facsimile (07) 3002 9009 THIESS WINS FORTESCUE PILBARA IRON ORE MINE CONTRACT Thiess has won a major $100 million contract with Fortescue Metals Group for Phase One development works on the Solomon Hub iron ore mine in Western Australia’s Pilbara region. The 18 month contract is for initial pioneering and mine establishment works such as haul roads, stockpile pads and the mining of early ore and waste. The work will establish the Solomon area for long term mining operations. Managing Director Bruce Munro said the contract represents a welcome return to the west for Thiess’ mining business and underlines the importance of Western Australia to Thiess as a whole. “Our Construction and Services businesses have long term client relationships and strong operations in the West and with the substantial iron ore reserves, there are clients we could assist in getting the best out of their mining operations” Mr Munro said. Thiess won the iron ore mine contract in a competitive process, and is now well positioned to bid for further works on the mine development and the main services contract which commences in approximately 12 months. Michael Wright, Executive General Manager of Thiess’ Australian Mining business, said Thiess is currently mobilising people and equipment to Solomon and commencing preliminary works on-site. “This is an exciting win for us and the start of a strong relationship with Fortescue”, Mr Wright said. The Solomon Hub mine is part of Fortescue’s Three Hub Strategy in the Pilbara, which will see overall annual production boosted to in excess of 155 million tonnes over the coming years. The Solomon Hub mine is expected to start producing iron ore in 2012. Thiess’ ability to quickly mobilise highly skilled people and appropriate equipment was central to the company’s successful bid. Thiess has re-established a mining office in Perth to support this and other mining projects. “With a team dedicated to WA, we can offer great service and value to our clients,” Mr Wright said. ENDS See video of Thiess Managing Director Bruce Munro discussing the significance of the Fortescue contract at: www.thiess.com.au Media contact: Alex Smith 07 3002 9673, 0412 796 183 or email [email protected]. Thiess has an annual turnover of $7 billion and $22 billion work in hand. With over 17,000 employees, it has become Australia’s leading and most trusted construction, mining and services contractor. Thiess is a wholly owned subsidiary of Leighton Holdings Limited. .