Rio Tinto raises Ivanhoe Mines stake to 49%, maximum permitted level until January 18, 2012

September 26, 2011

Rio Tinto purchased 3.7 million shares on the open market at C$19.75, ~25% premium to the market price, raising its stake in Ivanhoe to 49%.

Current standstill agreement caps Rio‟s ownership at the current 49% until January 18, 2012.

On August 24, Rio acquired approximately 27.9 million shares for US$536 million through its subscription right, which raised Rio‟s ownership from 46.5% to 48.5%.

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