GKP: Block Listing Six Monthly Return

3 November 2026

Gulf Keystone Petroleum Ltd. (LSE & OSE: GKP)
("Gulf Keystone", "GKP" or "the Company")

Block Listing Six Monthly Return

(Note: Italicised terms have the same meaning as given in the Listing Rules.)

+---------------------------------+-------+--------------+-----+-------------+
| Name of applicant:              |       | Gulf         |     |             |
|                                 |       | Keystone     |     |             |
|                                 |       | Petroleum    |     |             |
|                                 |       | Limited      |     |             |
+---------------------------------+-------+--------------+-----+-------------+
| Name of scheme:                 |       | Deferred     |     |             |
|                                 |       | Bonus        |     |             |
|                                 |       | Plan/Long    |     |             |
|                                 |       | Term         |     |             |
|                                 |       | Incentive    |     |             |
|                                 |       | Plan         |     |             |
+---------------------------------+-------+--------------+-----+-------------+
| Period of return:               | From: | 3 May 2026   | To: | 2 November  |
|                                 |       |              |     | 2026        |
+---------------------------------+-------+--------------+-----+-------------+
| Balance of unallotted           |       | 251,847      |     |             |
| securities under scheme(s) from |       | common       |     |             |
| previous return:                |       | shares of $1 |     |             |
|                                 |       | each         |     |             |
+---------------------------------+-------+--------------+-----+-------------+
| Plus:   The amount by which the |       | -            |     |             |
| block scheme(s) has been        |       |              |     |             |
| increased since the date of the |       |              |     |             |
| last return (if any increase    |       |              |     |             |
| has been applied for):          |       |              |     |             |
+---------------------------------+-------+--------------+-----+-------------+
| Less:   Number                  |       | -            |     |             |
| of securities issued/allotted   |       |              |     |             |
| under scheme(s) during period   |       |              |     |             |
| (see LR3.5.7G):                 |       |              |     |             |
+---------------------------------+-------+--------------+-----+-------------+
| Equals:   Balance under         |       | 251,847      |     |             |
| scheme(s) not yet               |       | common       |     |             |
| issued/allotted at end of       |       | shares of $1 |     |             |
| period:                         |       | each         |     |             |
+---------------------------------+-------+--------------+-----+-------------+

+------------------------------+---------------------------------------------+
| Name of contact:             | Alasdair Robinson, Chief Legal Officer &    |
|                              | Company Secretary                           |
+------------------------------+---------------------------------------------+
| Telephone number of contact: | +44 (0) 20 7514 1400                        |
+------------------------------+---------------------------------------------+

Enquiries:

+----------------------------------------------+------------------------------+
| Gulf Keystone:                               | +44 (0) 20 7514 1400         |
+----------------------------------------------+------------------------------+
| Aaron Clark, Head of Investor Relations      | aclark@gulfkeystone.com      |
| & Corporate Communications                   |                              |
|                                              |                              |
+----------------------------------------------+------------------------------+

or visit: www.gulfkeystone.com (http://www.gulfkeystone.com/)
----+\
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or visit: www.gulfkeystone.com (http://www.gulfkeystone.com/)\