MGX RESOURCES LIMITED — Board/Management Information 2012

Aug 14, 2012

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Mount Gibson Iron Limited

ABN 87 008 670 817

First Floor, 7 Havelock Street West Perth 6005, Western Australia PO Box 55, West Perth WA 6872 Telephone: 61-8-9426-7500 Facsimile: 61-8-9485 2305 E-mail: admin@mtgibsoniron.com.au

VIA: WWW.ASXONLINE.COM

ASX ANNOUNCEMENT

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ASX Code : MGX

15 August 2012

Appointment of Chief Operating Officer

Mount Gibson Iron Limited ( Mount Gibson ) is pleased to announce the appointment of highly experienced mining executive Andrew Thomson as Chief Operating Officer of the Company, following a comprehensive Australian and international executive search. Mr Thomson will commence in the role on 18 September 2012, after completing his notice period with his current employer.

Mr Thomson has over 30 years experience in mining, engineering and asset management, including a number of senior operational and management positions with Citic Pacific Mining, BHP Billiton and Rio Tinto.

Jim Beyer, Mount Gibson Chief Executive Officer, said: “We are delighted to have someone with Andrew’s extensive hands-on experience join Mount Gibson as we prepare to build on our standing as one of Australia’s leading iron ore producers.”

Mr Thomson is currently Managing Director of Cape Preston Port Company (CPPC), which is working at Citic Pacific Mining’s Sino Iron magnetite project in the Pilbara. In this role, Mr Thomson has been responsible for developing Western Australia’s first trans-shipment port. Prior to leading CPPC, Mr Thomson was Citic Pacific Mining’s Deputy Director Operations for the Sino Iron project, and spent 14 years in the Pilbara iron ore industry with Rio Tinto in roles ranging from operations, support services, safety, environment and asset management to project management and project direction.

Mount Gibson’s Acting Chief Operating Officer Keith Faulkner, who has filled the role on a contract basis since April, will remain with the Company for a period after Mr Thomson’s commencement to ensure a smooth handover of responsibilities.

For further information:

Jim Beyer Chief Executive Officer Mount Gibson Iron Limited +61-8-9426-7500

John Phaceas

Manager External Relations Mount Gibson Iron Limited +61-8-9426-7500

Alan Deans Last Word Corporate Communications +61 (0)427 490 992