Rio Tinto, through an indirect wholly-owned Canadian subsidiary, and Hathor Exploration Limited have agreed that Rio Tinto will make an offer to acquire all of the common shares of Hathor for C$4.15 in cash per common share. The value of the Rio Tinto offer is approximately C$578 million on a fully-diluted basis. Rio Tinto and Hathor have entered into a support agreement for the Rio Tinto offer. The Rio Tinto offer
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