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:

Hochschild Mining Plc

2 Reason for the notification (please tick the appropriate box or boxes):

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

An acquisition or disposal of instruments with similar economic effect to qualifying financial instruments

An event changing the breakdown of voting rights

Other (please specify):

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

Altima Partners LLP

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

The shares are held by Altima Global Special Situations Master Fund Limited.

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

 3 June 2009

6. Date on which issuer notified:

5 June 2009

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

 4%

8. Notified details:

A: Voting rights attached to shares

Class/type of shares

if possible using the ISIN CODE

Situation previous to the triggering transaction

Resulting situation after the triggering transaction

Number of Shares

Number of Voting Rights

Number of shares

Number of voting rights

% of voting rights

Direct

Direct

Indirect

Direct

Indirect

Ordinary Shares

GB00BIFW5029

14,800,175

4.82%

12,003,175

3.91%

B: Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financial instrument

Expiration date

Exercise/ Conversion Period

Number of voting rights that may be acquired if the instrument is exercised/ converted.

% of voting rights

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

Resulting situation after the triggering transaction

Type of financial instrument

Exercise price

Expiration date

Exercise/ Conversion period

Number of voting rights instrument refers to

% of voting rights

Nominal

Delta

Total (A+B+C)

Number of voting rights

Percentage of voting rights

12,003,175

3.91%

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

Altima Partners LLP is the Investment Advisor to the Altima Global Special Situations Master Fund Limited. The Corporate Member of Altima Partners LLP is Altima Services UK Limited which is owned and controlled by Altima International Limited. The voting share capital of Altima International Limited is held 50/50 by Mark Donegan and Dominic Redfern.

Proxy Voting:

10. Name of the proxy holder:

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

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

13. Additional information:

14. Contact name:

Raj Bhasin, Company Secretary

Hochschild Mining plc

15. Contact telephone number:

0207 907 2930