MACMAHON HOLDINGS LIMITED — Capital/Financing Update 2012

Feb 19, 2012

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20 February 2012

Macmahon awarded Darwin Marine Supply Base contract

Macmahon Holdings Ltd (ASX: MAH) has been awarded a contract to design and construct the worldclass Darwin Marine Supply Base, worth approximately $100 million.

Macmahon, as the construction partner in the ShoreASCO Consortium – which includes Asco Holdings, Macmahon Contractors and Capella Capital – will build the special purpose wharf and dockside infrastructure to service the provisioning of Offshore Supply Vessels (Rig Tenders). Macmahon will have no equity or operating involvement in the project.

Macmahon Chief Executive Officer Nick Bowen said the project was a fantastic opportunity for Macmahon and continues the Company’s delivery of major infrastructure in the Northern Territory.

“The supply base will bolster Darwin and the Territory’s reputation as the port of choice for servicing the needs of the offshore industry and is opportunity for Macmahon to establish another piece of major infrastructure, critical to supporting the Territory’s growth,” Mr Bowen said.

The contract will see Macmahon construct a new wharf dedicated to the offshore industry, plus establish undercover warehouse and open hardstand storage areas with built-in fuel, water and drilling bulks provisioning capacity, in addition to waste management and dangerous goods transit services across the secure facility.

“Large infrastructure projects have always been at the core of Macmahon’s operations and the Marine Supply Base further demonstrates the ability and flexibility of the Company to deliver significant infrastructure projects to an ever growing range of Clients,” Mr Bowen said.

The Marine Supply Base, to be built next to East Arm Wharf, is expected to be completed by the end of calendar 2013 and will employ in the order of 125 people at the peak of construction.

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For further information, please contact:

Investors Theresa Mlikota Chief Financial Officer +61 407 470 859 Media Stuart McLagan Group Communications Manager +61 458 755 117

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About Macmahon

Macmahon is a leading Australian contract mining and construction company with major projects throughout Australia, in New Zealand, Asia, Mongolia and Africa.

An ASX/S&P 200 company, Macmahon has played a major role in the delivery of many of Australia’s largest multi-disciplinary mining and construction projects throughout its 48 year history.

Directly employing more than 4300 people, Macmahon offers the full range of underground and surface mining services and comprehensive construction capabilities spanning transport, marine, water and resource infrastructure services.

With a commitment to providing end to end services, Macmahon’s reputation for outstanding teamwork, integrity and commitment to the environment is underpinned by the company’s core value - safety.

Visit www.macmahon.com.au for more information.

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