Publication of Information Document

NOT FOR RELEASE, PUBLICATION OR DISTRIBUTION, DIRECTLY OR INDIRECTLY, IN OR INTO THE UNITED STATES OF AMERICA, AUSTRALIA, CANADA, HONG KONG, SOUTH AFRICA OR JAPAN OR IN ANY JURISDICTION IN WHICH SUCH RELEASE, PUBLICATION OR DISTRIBUTION WOULD BE UNLAWFUL. THIS ANNOUNCEMENT IS NOT A PROSPECTUS AND DOES NOT CONSTITUTE A PUBLIC OFFER OF ANY OF THE SECURITIES DESCRIBED HEREIN.

17 February 2026

Gulf Keystone Petroleum Ltd. (LSE & OSE: GKP)

(“Gulf Keystone”, “GKP” or “the Company”)

Publication of Information Document

Reference is made to the stock exchange announcement made by Euronext Oslo Børs on 13 February 2026 regarding its decision to admit the shares of Gulf Keystone to trading on Euronext Growth Oslo.

The Company has prepared an information document solely for the purpose of the admission to trading on Euronext Growth Oslo. The information document is attached to this announcement on the Oslo Børs NewsWeb and will be made available on the Company’s website: https://www.gulfkeystone.com/investors/documents-circulars/

Enquiries:

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.

Important notice:

This announcement is not and does not form a part of any offer to sell, or a solicitation of an offer to purchase, any securities in the Company.

The distribution of this announcement and other information may be restricted by law in certain jurisdictions. Copies of this announcement are not being made and may not be distributed or sent into any jurisdiction in which such distribution would be unlawful or would require registration or other measures. Accordingly, this announcement is not for public release, publication or distribution, directly or indirectly, in or into, among others, the United States (including its territories and possessions, any state of the United States and the District of Columbia), Australia, Canada, Hong Kong, South Africa or Japan. Persons into whose possession this announcement or such other information should come, are required to inform themselves about and to observe any such restrictions. Persons distributing this announcement must satisfy themselves that it is lawful to do so.

The securities referred to in this announcement are subject to restrictions on transferability and resale in certain jurisdictions, and may not be transferred or resold except as permitted under applicable securities laws and regulations. The securities referred to in this announcement have not been and will not be registered under the U.S. Securities Act of 1933, as amended, and accordingly may not be offered or sold in the United States absent registration or an applicable exemption from the registration requirements of the Securities Act and in accordance with applicable U.S. state securities laws.

The issue, subscription or purchase of shares or other financial instruments in the Company is subject to specific legal or regulatory restrictions in certain jurisdictions. Neither the Company nor its Euronext Growth advisors assume any responsibility in the event there is a violation by any person of such restrictions. The distribution of this release may in certain jurisdictions be restricted by law. Any failure to comply with these restrictions may constitute a violation of the securities laws of any such jurisdiction.

Matters discussed in this announcement may constitute forward-looking statements. Forward-looking statements are statements that are not historical facts and may be identified by words such as “believe”, “expect”, “anticipate”, “strategy”, “intends”, “estimate”, “will”, “may”, “continue”, “should” and similar expressions. Any forward-looking statements in this release are based upon various assumptions, many of which are based, in turn, upon further assumptions. Although the Company believes that these assumptions were reasonable when made, these assumptions are inherently subject to significant known and unknown risks, uncertainties, contingencies and other important factors which are difficult or impossible to predict and are beyond their control. By their nature, forward-looking statements are subject to numerous factors, risks and uncertainties that could cause actual outcomes and results to be materially different from those projected. Readers are cautioned not to place undue reliance on these forward-looking statements.

Except for any ongoing obligation to disclose material information as required by the applicable law, the Company does not have any intention or obligation to publicly update or revise any forward-looking statements after it distributes this announcement, whether to reflect any future events or circumstances or otherwise.

None of the Company, its Euronext Growth advisors nor any of their respective subsidiary undertakings, affiliates or any of their respective directors, officers, employees, advisors, agents or any other person accepts any responsibility whatsoever for, or makes any representation or warranty, express or implied, as to the truth, accuracy, completeness or fairness of the information or opinions in this announcement (or whether any information has been omitted from the announcement) or any other information relating to the Company, or associated companies, whether written, oral or in a visual or electronic form, and howsoever transmitted or made available or for any loss howsoever arising from any use of this announcement or its contents or otherwise arising in connection therewith.

This announcement is made by and, and is the responsibility of, the Company. The Company’s Euronext Growth advisors are acting exclusively for the Company in connection with the admission to trading on Euronext Growth Oslo and no one else, and will not be responsible to anyone other than the Company providing the protections afforded to their respective clients, or for advice in relation to the contents of this announcement or any of the matters referred to herein. Neither the Company’s Euronext Growth advisors nor any of their respective affiliates makes any representation as to the accuracy or completeness of this announcement and none of them accepts any responsibility for the contents of this announcement or any matters referred to herein.

This announcement is for information purposes only and is not to be relied upon in substitution for the exercise of independent judgment. It is not intended as investment advice and under no circumstances is it to be used or considered as an offer to sell, or a solicitation of an offer to buy any securities or a recommendation to buy or sell any securities of the Company. The price and value of securities and any income from them can go down as well as up and you could lose your entire investment. Past performance is not a guide to future performance. Information in this announcement cannot be relied upon as a guide to future performance. Neither of the Company’s Euronext Growth advisors, nor any of their respective affiliates, accept any liability arising from the use of this announcement.