Transaction in Own Shares

Rio Tinto PLC
20 February 2007

Transaction in own shares

20 February 2007

Rio Tinto plc today acquired through JPMorgan Cazenove Limited 400,000 of its
ordinary shares at an average price of 2817.5309 pence per ordinary share. The
purchased shares will all be held as treasury shares.

Following the above purchase, Rio Tinto plc holds 56,566,002 ordinary shares as
treasury shares. The total number of ordinary shares in issue (excluding shares
held as treasury shares) is 1,015,143,323.

For further information, please contact:

Investor Relations

Nigel Jones

Office: [phone]

Mobile: [phone]

Secretarial Department

Matthew Whyte

Office: [phone]

Website: www.riotinto.com




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