Gulf Keystone Petroleum Regulatory News (GKP)

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%

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 thefinancial 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