Holding(s) in Company

TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARES

1. Identity of the issuer or the underlying issuer of existing shares to which voting rights are attached:

Kazakhmys PLC

2. Reason for the notification (Yes/No)

An acquisition or disposal of voting rights: (Yes)

An acquisition or disposal of qualifying financial instruments which may result in the acquisition of shares already issued to which voting rights are attached: (No)

An acquisition or disposal of instruments with similar economic effect to qualifying financial instruments: (No)

An event changing the breakdown of voting rights: (No)

Other (please specify):

3. Full name of person(s) subject to the notification obligation:

Cuprum Holding Limited

4. Full name of shareholder(s) (if different from 3.):

Lynchwood Nominees Limited A/C 2006420

5. Date of the transaction and date on which the threshold is crossed or reached:

23 December 2011

6. Date on which issuer notified:

28 December 2011

7. Threshold(s) that is/are crossed or reached:

Below 3% to 25%

8. Notified details:

A: Voting rights attached to shares

Class/type of shares (if possible using the ISIN CODE):

GB00B0HZPV38

Situation previous to the triggering transaction

Number of shares: Nil

Number of voting rights: Nil

Resulting situation after the triggering transaction

Number of shares (direct): 135,944,325

Number of voting rights (direct): Nil

Number of voting rights (indirect): 135,944,325

% of voting rights (direct): Nil

% of voting rights (indirect): 25.66%

B: Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financial instrument: N/A

Expiration date: N/A

Exercise/conversion period: N/A

Number of voting rights that may be acquired if the instrument is

exercised/converted: N/A

% of voting rights: N/A

C: Financial Instruments with similar economic effect to Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financial instrument: N/A

Exercise price: N/A

Expiration date: N/A

Exercise/conversion period: N/A

Number of voting rights instrument refers to: N/A

% of voting rights (nominal): N/A

% of voting rights (delta): N/A

Total (A+B+C)

Number of voting rights: 135,944,325

Percentage of voting rights: 25.66%

9. Chain of controlled undertakings through which the voting rights and/or the financial instruments are effectively held, if applicable:

Lynchwood Nominees Limited A/C 2006420 holds shares in the capacity as nominee on behalf of Cuprum Holding Limited.

Cuprum Holding Limited is wholly-owned by Folin Trust which Vladimir Kim is the ultimate beneficial owner.

Proxy Voting:

10. Name of the proxy holder:

N/A

11. Number of voting rights proxy holder will cease to hold:

N/A

12. Date on which proxy holder will cease to hold voting rights:

N/A

13. Additional information:

Due to a restructuring of the shareholding of Vladimir Kim, Cuprum Holding B.V. has transferred its shareholding in Kazakhmys PLC to its parent company, Cuprum Holding Limited. The beneficial interest of Vladimir Kim does not change as a consequence of this restructuring.

14. Contact name:

Robert Welch, Company Secretary

15. Contact telephone number:

020 7901 7831