Total Voting Rights

1 June 2021

Gulf Keystone Petroleum Ltd. (LSE: GKP)

("Gulf Keystone", "GKP" or "the Company")

Total Voting Rights     

The following notification is made in accordance with the UK Financial Conduct Authority's Disclosure Guidance and Transparency Rule 5.6. At the close of business on 28 May 2021, Gulf Keystone had 212,869,955 common shares of $1.00 each in issue, none of which were held in Treasury. Therefore, the total number of voting rights in the Company was 212,869,955.

In the past month, Mr Jón Ferrier, Gulf Keystone's former CEO, exercised all vested nil-cost options under the 2016 Value Creation Plan, resulting in the issuance of 999,453 nil-cost options after satisfaction of the tax liability arising upon exercise.

The figure of 212,869,955 may be used by shareholders as the denominator for the calculations by which they will determine if they are required to notify their interest in, or a change to their interest in, Gulf Keystone under the FCA's Disclosure and Transparency Rules.

Enquiries:

or visit: www.gulfkeystone.com

Notes to Editors:

Gulf Keystone Petroleum Ltd. (LSE: GKP) is a leading independent operator and producer in the Kurdistan Region of Iraq. Further information on Gulf Keystone is available on its website www.gulfkeystone.com

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