TR-1

Gulf Keystone Petroleum Ltd (GKP) TR-1 24-May-2023 / 10:30 GMT/BST TR-1: Standard form for notification of major holdings NOTIFICATION OF MAJOR HOLDINGS (to be sent to the relevant issuer and to the FCA in Microsoft Word format if possible)i 1a. Identity of the issuer or the underlying issuer of existing shares to which voting rights are attachedii: Gulf Keystone Petroleum Ltd Sedol BYVGFL0 1b. Please indicate if the issuer is a non-UK issuer  (please mark with an “X” if appropriate) X 2. Reason for the notification (please mark the appropriate box or boxes with an “X”) An acquisition or disposal of voting rights An acquisition or disposal of financial instruments An event changing the breakdown of voting rights X Other (please specify)iii: 3. Details of person subject to the notification obligationiv Name 1 Lansdowne Partners Austria GmbH 2Lansdowne Partners Cyprus Limited 3Lansdowne Partners International Limited City and country of registered office (if applicable) Vienna, Austria 4. Full name of shareholder(s) (if different from 3.)v  Morgan Stanley Client Securities Nominees Limited a/c "SEG" and Aurora Nominees (Registered Shareholders) Name n/a City and country of registered office (if applicable) n/a 5. Date on which the threshold was crossed or reachedvi: 19/05/2023 6. Date on which issuer notified (DD/MM/YYYY): 23/05/2023 7. Total positions of person(s) subject to the notification obligation % of voting rights attached to shares (total of 8. A) % of voting rights through financial instruments (total of 8.B 1 + 8.B 2) Total of both in % (8.A + 8.B) Total number of voting rights of issuervii Resulting situation on the date on which threshold was crossed or reached 14.63% 14.63 14.63% 222,443,655 Position of previous notification (if applicable) 15.02% 15.02%               8. Notified details of the resulting situation on the date on which the threshold was crossed or reachedviii A: Voting rights attached to shares Class/type of shares ISIN code (if possible) Number of voting rightsix % of voting rights Direct (Art 9 of Directive 2004/109/EC) (DTR5.1) Indirect (Art 10 of Directive 2004/109/EC) (DTR5.2.1) Direct (Art 9 of Directive 2004/109/EC) (DTR5.1) Indirect (Art 10 of Directive 2004/109/EC) (DTR5.2.1) BMG4209G2077 32,549,217 14.63% SUBTOTAL 8. A 32,549,217 B 1: Financial Instruments according to Art. 13(1)(a) of Directive 2004/109/EC (DTR5.3.1.1 (a)) Type of financial instrument Expiration datex Exercise/ Conversion Periodxi Number of voting rights that may be acquired if the instrument is exercised/converted. % of voting rights SUBTOTAL 8. B 1 B 2: Financial Instruments with similar economic effect according to Art. 13(1)(b) of Directive 2004/109/EC (DTR5.3.1.1 (b)) Type of financial instrument Expiration datex Exercise/ Conversion Period xi Physical or cash settlementxii Number of voting rights % of voting rights SUBTOTAL 8.B.2                     9. Information in relation to the person subject to the notification obligation (please mark the applicable box with an “X”) Person subject to the notification obligation is not controlled by any natural person or legal entity and does not control any other undertaking(s) holding directly or indirectly an interest in the (underlying) issuerxiii Full chain of controlled undertakings through which the voting rights and/or the financial instruments are effectively held starting with the ultimate controlling natural person or legal entityxiv (please add additional rows as necessary) X Namexv % of voting rights if it equals or is higher than the notifiable threshold % of voting rights through financial instruments if it equals or is higher than the notifiable threshold Total of both if it equals or is higher than the notifiable threshold Lansdowne Partners Austria GmbH 14.63% 14.63% Lansdowne Partners Cyprus Limited Lansdowne Partners International Limited 14.63% 14.63% 10. In case of proxy voting, please identify: Name of the proxy holder The number and % of voting rights held The date until which the voting rights will be held 11. Additional informationxvi           Place of completion Vienna Date of completion 23 May 2020 Please send the completed form together with this annex to the FCA at the following email address: [e-mail]. Please send in Microsoft Word format if possible. Dissemination of a Regulatory Announcement, transmitted by EQS Group. The issuer is solely responsible for the content of this announcement.

ISIN:	BMG4209G2077
Category Code:	MSCM
TIDM:	GKP
LEI Code:	213800QTAQOSSTNTPO15
Sequence No.:	246079
EQS News ID:	1640751

End of Announcement	EQS News Service