Holding(s) in Company

Gulf Keystone Petroleum Ld
04 June 2007


 

TR-1(i): NOTIFICATION OF MAJOR INTERESTS IN SHARES

 

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


GULF KEYSTONE PETROLEUM LTD




2. Reason for the notification (please state Yes/No): (   )
 
An acquisition or disposal of voting rights:                               (X)
 
An acquisition or disposal of financial instruments which may result 
in the acquisition of shares already issued to which voting rights are 
attached:                                                                  (   )

An event changing the breakdown of voting rights:                          (   )
                                                                           
Other (please specify) :                                                   (   )

 

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


OPPENHEIMERFUNDS INC (OFI)


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


 

5. Date of the transaction and date on which the threshold is crossed or reached
if different) (v):


31 MAY 2007


6. Date on which issuer notified:


1 JUNE 2007

 

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


7%


 

8. Notified details:


GULF KEYSTONE PETROLEUM LTD
CANON'S COURT
22 VICTORIA STREET
HAMILTON
HM12 
BERMUDA

www.gulfkeystone.com

Fax Number 011 44 207514 1427

Jon Cooper (Finance Director):

[e-mail]


A: Voting rights attached to shares

 
Class/type of shares            Situation previous to  
if possible using the           the Triggering         
ISIN CODE                       transaction (vi)       

                       Number of shares       Number of voting Rights 
                                              (viii)                  
                                                                      

BMG4209G1087           17,000,000             17,000,000

 

                     Resulting situation after the triggering transaction (vii)

Class/type of shares Number of shares  Number of voting rights    % of voting rights  
if possible using                      (ix)                                           
the ISIN CODE                                                                         

                     Direct            Direct (x) Indirect (xi)   Direct    Indirect  
                                                                                      

BMG4209G1087         20,500,000                   20,500,000                7.41%
                                                                                      
                                                                                      

 

B: Financial Instruments

Resulting situation after the triggering transaction (xii)

 
Type of     Expiration Date  Exercise/Conversion Number of voting     % of voting     
financial   (xiii)           Period/ Date (xiv)  rights that may be   rights          
instrument                                       acquired if the                      
                                                 instrument is                        
                                                 exercised/                           
                                                 converted.                           
                                                                                      
                                                                                      

 

Total (A+B)

Number of voting rights       % of voting rights 

                                        
20,500,000                      7.41%

 

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


OPPENHEIMERFUNDS INC. OWNS AS OF 5/31/2007, 20,500,000 SHARES EQUAL TO 7.41%
BASED ON SHARES OUTSTANDING OF 276,755,108


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:


 

15. Contact telephone number:


 

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