Rio Tinto ADRs

On 12 April 2010 Rio Tinto announced a ratio change for the Rio Tinto plc (NYSE: RIO) American Depository Receipt (ADR) program.

 ADR record date:   April 22, 2010
 ADR payment date:   April 29, 2010
 ADR effective date:    April 30, 2010
 Old Ratio:  1 ADR: 4 Ordinary shares
 New Ratio:  1 ADR: 1 Ordinary share
 Depositary:   JPMorgan Chase Bank, NA
 Custodian:    JPMorgan, London

To effect this change, ADR holders will receive three (3) additional ADRs for every one (1) ADR held as of April 22, 2010, the ADR record date. 

Existing ADRs will continue to be valid and will not have to be exchanged for new ADRs. In connection herewith, JP Morgan's books will be closed for issuances and cancellations from the close of business April 21, 2010 until the close of business May 4, 2010. JP Morgan's transfer books, however, will remain open.

If you have any questions, please call the JPMorgan Service Center at 1 800 990 1135.

You can visit JPMorgan's website at adr.com for worldwide ADR market information.