Update on Shaikan Field operations

Gulf Keystone, a leading independent operator and producer in the Kurdistan Region of Iraq (“Kurdistan”), announces that, following the recent restart of production and exports operations on 24 June 2026, gross volumes have successfully ramped up to over 43,000 bopd. Well activities are underway to bring incremental production online in the coming weeks. The Company continues to closely monitor the security environment in Kurdistan and the broader region.

The Company is progressing towards achieving sustainable exports sales at international prices, with constructive engagement to implement long-term exports agreements. The Company remains focused on strict cost control while continuing its discussions with Kurdistan’s Ministry of Natural Resources on a revised Shaikan Field Development Plan.

Enquiries:

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

or visit: www.gulfkeystone.com

Notes to Editors: Gulf Keystone Petroleum Ltd. (LSE & OSE: 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