Implementation of cross border transfers between the LSE and Euronext Growth Oslo

2 April 2026 Gulf Keystone Petroleum Ltd. (LSE & OSE: GKP) (“Gulf Keystone”, “GKP”, “the Group” or “the Company”) Implementation of cross border transfers between the LSE and Euronext Growth Oslo Gulf Keystone, a leading independent operator and producer in the Kurdistan Region of Iraq (“Kurdistan”), confirms that cross border transfers have been activated between the Company’s listings on the London Stock Exchange (“LSE”) and Euronext Growth Oslo. Shareholders wishing to transfer their shares between the two trading venues are advised to contact their CREST and / or Norwegian VPS custodian or broker to discuss the options available to them. The Company confirms that the Depositary Interests previously used for the settlement of trades on the LSE have been cancelled and have been replaced by CREST Depositary Interests (“CDIs”) issued by Euroclear UK & International Limited (“Euroclear”). The CDIs are held in a nominee account for Euroclear registered in the Norwegian VPS. Enquiries: Gulf Keystone: +44 (0) 20 7514 1400 Aaron Clark, Head of Investor Relations & Corporate Communications aclark@gulfkeystone.com FTI Consulting +44 (0) 20 3727 1000 Ben Brewerton Nick Hennis GKP@fticonsulting.com 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