Rio Tinto media release Web versionhttp://riotinto.msgfocus.com/q/1MtPh8aSlVrjos/wv If you have problems viewing images in Outlook, please add us to your safe list 17 Nov 2011 Rio Tinto increases all-cash offer for Hathor Exploration to C$4.70 per share with reaffirmed recommendation from Hathor board Rio Tinto today increased its offer, made through an indirect wholly-owned Canadian subsidiary (the “Offeror”), to acquire all of Hathor Exploration Limited’s common shares to C$4.70 in cash per common share. Rio Tinto’s increased offer values Hathor at approximately C$654 million on a fully-diluted basis and represents a premium to Cameco Corporation’s unsolicited revised offer of C$4.50 per common share made on 14 November 2011. The Hathor board of directors has reaffirmed its support for Rio Tinto’s increased offer and unanimously recommends that Hathor shareholders accept and tender their common shares to Rio Tinto’s increased offer. The support agreement between the Offeror and Hathor has been amended by the parties to reflect Rio Tinto’s increased offer and remains in effect.

The lock-up agreements with Hathor directors and senior officers also remain in effect. The increased offer remains open for acceptance until 5:00pm (Toronto time) on 30 November 2011, unless extended or withdrawn in accordance with its terms.

Full details of the increased offer are included in a notice of variation that will be mailed by the Offeror to Hathor securityholders.

The increased offer is subject to customary conditions, as described in the original offer and takeover bid circular dated 25 October 2011 and delivered to Hathor securityholders. Shareholders with questions regarding the Rio Tinto increased offer can contact Rio Tinto’s information agent, Laurel Hill Advisory Group toll free at 1-877-452-7184 or collect 416-637-4661 or email About Rio Tinto in Canada Rio Tinto employs over 13,400 people across its extensive operations in Canada, which include mining and manufacturing interests in alumina, aluminium, iron ore, diamonds and titanium dioxide.

Rio Tinto also operates exploration activities, research and development centres, port and rail facilities to support various businesses, technical and sales service centres, and substantial hydroelectric power facilities in British Columbia and Quebec.

In addition, Canada is home to the global headquarters of Rio Tinto Alcan. About Rio Tinto Rio Tinto is a leading international mining group headquartered in the UK, combining Rio Tinto plc, a London and New York Stock Exchange listed company, and Rio Tinto Limited, which is listed on the Australian Securities Exchange. Rio Tintos business is finding, mining, and processing mineral resources.

Major products are aluminium, copper, diamonds, thermal and metallurgical coal, uranium, gold, industrial minerals (borax, titanium dioxide and salt) and iron ore.

Activities span the world and are strongly represented in Australia and North America with significant businesses in Asia, Europe, Africa and South America. Contacts: Media Relations, EMEA / Americas Illtud Harri Office: +44 (0) 20 7781 1152 Mobile: +44 (0) 7920 503 600 Tony Shaffer Office: +44 (0) 20 7781 1138 Mobile: +44 (0) 7920 041 003 Christina Mills Office: +44 (0) 20 7781 1154 Mobile: +44 (0) 7825 275 605 Media Relations, Australia / Asia David Luff Office: +61 (0) 3 9283 3620 Mobile: +61 (0) 419 850 205 Karen Halbert Office: +61 (0) 3 9283 3627 Mobile: +61 (0) 412 119 389 Bruce Tobin Office: +61 (0) 3 9283 3612 Mobile: +61 (0) 419 103 454 Media Relations, Canada Bryan Tucker Office: +1 (0) 514 848 8151 Mobile: +1 (0) 514 825 8319 Investor Relations, London Mark Shannon Office: +44 (0) 20 7781 1178 Mobile: +44 (0) 7917 576 597 David Ovington Office: +44 (0) 20 7781 2051 Mobile: +44 (0) 7920 010 978 Investor Relations, North America Jason Combes Office: +1 (0) 801 204 2919 Mobile: +1 (0) 801 558 2645 Investor Relations, Australia Dave Skinner Office: +61 (0) 3 9283 3628 Mobile: +61 (0) 408 335 309 Christopher Maitland Office +61 (0) 3 9283 3063 Mobile +61 (0) 459 800 131 Further information: If you have been forwarded this email, you may wish to click here to signup for our media releases http://riotinto.msgfocus.com/c/132vecY3tnG4g0nqdikpgGyc directly. Follow us on Twitter http://riotinto.msgfocus.com/c/132vgfHPRkgHH9t9KnEznkPF Website: www.riotinto.com http://riotinto.msgfocus.com/c/132viirCfgRl8iyThsYJtZ78 LEGAL INFORMATION - Copyright © 2010 Rio Tinto.

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