Holding(s) in Company

Gulf Keystone Petroleum Ld
10 May 2006


                Gulf Keystone Petroleum Limited ("the Company")


                               Holding in Company



The Company was notified on 10 May 2006 by Fidelity International Limited
("Fidelity") that FMR Corp. and its direct and indirect subsidiaries, Fidelity
and its direct and indirect subsidiaries and Mr. Edward C. Johnson 3rd (as a
principal share holder of FMR Corp. and Fidelity) are interested in 10,574,335
common shares of US$0.01 each ("Common Shares"), representing 4.17 per cent. of
the Company's issued Common Share capital.


The above interest is held as follows;

Registered Holder                                  Management          Number of
                                                      Company             Shares

STATE STR BK AND TR CO LNDN
(S)                                                  Fidelity        3,163,535
                                                      Pension
                                                   Management
                                                      ("FPM")
NORTHERN TRUST LONDON                                     FPM        2,112,500
JP MORGAN, BOURNEMOUTH                                    FPM        2,033,200
HSBC BANK PLC                                             FPM          644,400
MELLON BANK                                               FPM           72,200
BANK OF NEW YORK BRUSSELS                                 FPM           24,200
JP MORGAN, BOURNEMOUTH                               Fidelity        1,764,000
                                                   Investment
                                                Services Ltd.
JP MORGAN, BOURNEMOUTH                               Fidelity          760,300
                                                International
                                                      Limited


10 May 2006




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