Holding(s) in Company

Gulf Keystone Petroleum Ld
24 May 2007





TR-1: NOTIFICATION OF MAJOR INTERESTS IN SHARES


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

Gulf Keystone Petroleum Ltd.



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 financial instruments which may result 
in the acquisition of shares already issued to which voting rights are 
attached:                                                                    No


An event changing the breakdown of voting rights:                            No


Other (please specify):                                                      No



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

Gartmore Investment Limited



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

See attached schedule


 

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

11th May 2007



6. Date on which issuer notified:

14th May 2007

 

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

Below 5%




8. Notified details:




A: Voting rights attached to shares

 
Class/type of shares            Situation previous to  
                                the Triggering
If possible using the           transaction          
ISIN CODE                              

                       Number of shares       Number of voting Rights 

BMG4209G1087           18,322,179             18,322,179






Resulting situation after the triggering transaction 
 
Class/type of shares   Number of shares   Number of voting rights    % of voting rights  

if possible using                                                                 
the ISIN CODE                                                                         

                       Direct             Direct     Indirect        Direct    Indirect  

BMG4209G1087           276,755,108                   276,755,108               4.652%

 




B: Financial Instruments

Resulting situation after the triggering transaction 

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

 



Total (A+B)


Number of voting rights       % of voting rights 

276,755,108                   4.652%


 



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





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:

All shares are held indirectly

All figures are based on the Companies issued share capital of 12,873,553 as 
provided by Exshare

Email contact [e-mail]

 

14. Contact name:

Allison Averono



15. Contact:

0207 782 2324




Report:  S212                            Current Holdings By Fund Manager                                 24 May 2007


Stock Line: B019X62    GULF KEYSTONE PETR COM STK USD0.01


                               Number                      Percentage                  
                               of           Issued         of            UK
                               Shares       Share          Issued        Registered               Beneficial
Fund Managing Co.              Held         Capital        Capital       Owner           Fund     Owner

                                                           
Gartmore Investment Limited    6,177,723                   2.232 %       VIDACOS         VOLANT   THE ALPHAGEN VOLANTIS 
                                                                         NOMINEES LTD             FUND LIMITED
                                                                         A/C 2303


Gartmore Investment Limited    2,200,000                   0.795 %       BNY GIL CLT     LST      GARTMORE SMALLER 
                                                                         A/C NOMS LTD             COMPANIES TRUST PLC
                                                                         A/C LST


Gartmore Investment Limited      461,391                   0.167 %       BNY GIL CLT     56640    GARTMORE GROWTH
                                                                         A/C NOMS LTD             OPPORTUNITIES PLC
                                                                         A/C NWSC


Gartmore Investment Limited      372,675                   0.135 %       BANK OF         SICAV3   GARTMORE SICAV PAN
                                                                         BERMUDA                  EURO SMALLER 
                                                                         LUXEMBOURG               COMPANIES FUND


Gartmore Investment Limited    3,386,744                   1.224 %       NORTRUST        54550    STRATHCLYDE PENSION 
                                                                         NOMINEES                 FUND
                                                                         LIMITED


                              __________                  ________
                              12,598,533                   4.552 %

                              12,598,533   276,755,108     4.552%
                              ==========   ===========    ========
                              


                                     End of Report





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