Publication of Supplementary Prospectus

NOT FOR RELEASE, PUBLICATION OR DISTRIBUTION, IN WHOLE OR IN PART, IN OR INTO ANY RESTRICTED JURISDICTIONS OR ANY OTHER JURISDICTION WHERE TO DO SO WOULD CONSTITUTE A VIOLATION OF THE RELEVANT LAWS OF SUCH JURISDICTION.

FOR IMMEDIATE RELEASE

22 August 2013

Kazakhmys PLC ("Kazakhmys" or the "Company")

PUBLICATION OF SUPPLEMENTARY PROSPECTUS

Following the publication of the Prospectus dated 7 August 2013 relating to the Kazakhmys Shares being offered by Eurasian Resources to the Relevant ENRC Shareholders as partial consideration in connection with the ENRC Takeover Offer, Kazakhmys has published its half-yearly report for the six months ended 30 June 2013.

Kazakhmys announces that a supplementary prospectus, which supplements the disclosure contained in the Prospectus (the "Supplementary Prospectus") has today been approved by the FCA. Accordingly, the Supplementary Prospectus should be read in conjunction with the Prospectus and is available at www.kazakhmys.com.

The Supplementary Prospectus has been submitted to the National Storage Mechanism and will shortly be available for inspection at www.hemscott.com/nsm.do. The Supplementary Prospectus is also available for inspection at the registered office of the Company, 6th Floor, Cardinal Place, 100 Victoria Street, London SW1E 5JL, United Kingdom.

Capitalised terms used in this announcement but not otherwise defined herein shall have the same meanings given in the Prospectus dated 7 August 2013.

For further information please contact:

KazakhmysJohn Smelt Corporate Communications Tel: + 44 (0)20 7901 7882Robert Welch Company Secretary Tel: + 44 (0)20 7901 7831

College HillDavid Simonson Tel: + 44 (0)20 7457 2031Anca Spiridon Tel: + 44 (0)20 7457 2842

REGISTERED OFFICE6th Floor, Cardinal Place, 100 Victoria Street, London SW1E 5JL, United Kingdom.

This announcement is not intended to, and does not constitute, or form part of, an offer to sell, purchase or exchange or the solicitation of an offer to sell, purchase or exchange any securities or the solicitation of any vote or approval in any jurisdiction pursuant to the ENRC Takeover Offer or otherwise. The ENRC Takeover Offer has been made solely by means of an Eurasian Resources Offer Document and the forms of acceptance accompanying the Eurasian Resources Offer Document, which contain the full terms and conditions of the ENRC Takeover Offer, including details of how the ENRC Takeover Offer may be accepted. This announcement does not constitute a prospectus or a prospectus equivalent document and Kazakhmys Shares are not being offered to the public by means of this announcement.