TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARESi

TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARESi

1. Identity of the issuer or the underlying issuerof existing shares to which voting rights areattached: ii

Petra Diamonds Limited

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

An acquisition or disposal of voting rights

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):

Update of position

YES

3. Full name of person(s) subject to thenotification obligation: iii

JPMorgan Asset Management Holdings Inc.

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

JPMorgan Asset Management (UK) Limited

JPMorgan Asset Management (Taiwan) Limited

J.P. Morgan Investment Management Inc.

JPMorgan Chase Bank, National Association

5. Date of the transaction and date onwhich the threshold is crossed orreached: v

N/A

6. Date on which issuer notified:

09 January 2012

7. Threshold(s) that is/are crossed orreached: vi, vii

5%

8. Notified details:

A: Voting rights attached to shares viii, ix

Class/type ofshares

if possible usingthe ISIN CODE

Situation previousto the triggeringtransaction

Resulting situation after the triggering transaction

NumberofShares

NumberofVotingRights

Numberof shares

Number of votingrights

% of voting rights x

Direct

Direct xi

Indirect xii

Direct

Indirect

BMG702781094

N/A

N/A

39,603,194

7.90%

B: Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financialinstrument

Expirationdate xiii

Exercise/Conversion Period xiv

Number of votingrights that may beacquired if theinstrument isexercised/ converted.

% of votingrights

C: Financial Instruments with similar economic effect to Qualifying Financial Instruments xv, xvi

Resulting situation after the triggering transaction

Type of financialinstrument

Exercise price

Expiration date xvii

Exercise/Conversion period xviii

Number of voting rights instrument refers to

% of voting rights xix, xx

Nominal

Delta

Total (A+B+C)

Number of voting rights

Percentage of voting rights

39,603,194

7.90%

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

Total disclosable holding for JPMorgan Asset Management Holdings Inc : 39,603,194 (7.90%)

JPMorgan Asset Management (UK) Limited: 39,177,340 (7.81%)

JPMorgan Asset Management (Taiwan) Limited

J.P. Morgan Investment Management Inc.

JPMorgan Chase Bank, National Association

Proxy Voting:

10. Name of the proxy holder:

N/A

11. Number of voting rights proxy holder will ceaseto hold:

N/A

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

N/A

13. Additional information:

N/A

14. Contact name:

Michael Kirwan

15. Contact telephone number:

020 7134 6153

Note: Annex should only be submitted to the FSA not the issuer

Annex: Notification of major interests in share

A: Identity of the persons or legal entity subject to the notification obligation

Full name

(including legal form of legal entities)

JPMorgan Asset Management Holdings Inc.

Contact address

(registered office for legal entities)

245 Park Avenue, New York, NY10167

Phone number & email

001 212 648 2355

Other useful information

(at least legal representative for legal persons)

N/A

B: Identity of the notifier, if applicable

Full name

Michael Kirwan

Contact address

JPMorgan Chase, 13th Floor, 125 London Wall, London, EC2Y 5AJ

Phone number & email

020 7134 6153

[email protected]

Other useful information

(e.g. functional relationship with the person or legal entity subject to the notification obligation)

N/A

C: Additional information

N/A

For notes on how to complete form TR-1 please see the FSA website.