| 1 | Details of the person discharging managerial responsibilities/person closely associated |
| a) | Name | Linda Z. Cook |
| 2 | Reason for the notification |
| a) | Position/status | Chief Executive Officer |
| b) | Initial notification/Amendment | Initial notification |
| 3 | Details of the issuer, emission allowance market participant, auction platform, auctioneer or auction monitor |
| a) | Name | Harbour Energy plc |
| b) | LEI | 213800YPC42DYBKVPF97 |
| 4 | Details of the transaction(s): section to be repeated for (i) each type of instrument; (ii) each type of transaction; (iii) each date; and (iv) each place where transactions have been conducted |
| a) | Description of the financial instrument, type of instrument Identification code | Ordinary shares of 0.002 pence each
GB00BMBVGQ36 |
| b) | Nature of the transaction | (i) Vesting of Performance Share Award under the 2017 LTIP (ii) Shares sold to cover tax & NI (balance of 172,801 shares retained) |
| c) | Price(s) and volume(s) | | Price(s) | Volume(s) | (i) £0.00 (ii) £2.814 | 284,916 112,115 |
|
| d) | Aggregated information
| | Price(s) | Volume(s) | | £0.00 | 284,916 | | £2.814 | 112,115 |
|
| e) | Date of the transaction | 2026-04-07 |
| f) | Place of the transaction | London Stock Exchange |
| 1 | Details of the person discharging managerial responsibilities/person closely associated |
| a) | Name | Alexander Krane |
| 2 | Reason for the notification |
| a) | Position/status | Chief Financial Officer |
| b) | Initial notification/Amendment | Initial notification |
| 3 | Details of the issuer, emission allowance market participant, auction platform, auctioneer or auction monitor |
| a) | Name | Harbour Energy plc |
| b) | LEI | 213800YPC42DYBKVPF97 |
| 4 | Details of the transaction(s): section to be repeated for (i) each type of instrument; (ii) each type of transaction; (iii) each date; and (iv) each place where transactions have been conducted |
| a) | Description of the financial instrument, type of instrument Identification code | Ordinary shares of 0.002 pence each
GB00BMBVGQ36 |
| b) | Nature of the transaction | (i) Vesting of Performance Share Award under the 2017 LTIP (ii) Shares sold to cover tax & NI (balance of 74,151 shares retained) |
| c) | Price(s) and volume(s) | | Price(s) | Volume(s) | (i) £0.00 (ii) £2.814 | 152,512 78,361 |
|
| d) | Aggregated information
| | Price(s) | Volume(s) | | £0.00 | 152,512 | | £2.814 | 78,361 |
|
| e) | Date of the transaction | 2026-04-07 |
| f) | Place of the transaction | London Stock Exchange |
| 1 | Details of the person discharging managerial responsibilities/person closely associated |
| a) | Name | Linda Z. Cook |
| 2 | Reason for the notification |
| a) | Position/status | Chief Executive Officer |
| b) | Initial notification/Amendment | Initial notification |
| 3 | Details of the issuer, emission allowance market participant, auction platform, auctioneer or auction monitor |
| a) | Name | Harbour Energy plc |
| b) | LEI | 213800YPC42DYBKVPF97 |
| 4 | Details of the transaction(s): section to be repeated for (i) each type of instrument; (ii) each type of transaction; (iii) each date; and (iv) each place where transactions have been conducted |
| a) | Description of the financial instrument, type of instrument Identification code | Ordinary shares of 0.002 pence each
GB00BMBVGQ36 |
| b) | Nature of the transaction | (i) Vesting of Deferred Bonus Award under the 2017 LTIP (ii) Shares sold to cover tax & NI (balance of 183,830 shares retained) |
| c) | Price(s) and volume(s) | | Price(s) | Volume(s) | (i) £0.00 (ii) £2.866 | 303,100 119,270 |
|
| d) | Aggregated information
| | Price(s) | Volume(s) | | £0.00 | 303,100 |
|
| e) | Date of the transaction | 2026-04-07 |
| f) | Place of the transaction | Outside of trading venue |
| 1 | Details of the person discharging managerial responsibilities/person closely associated |
| a) | Name | Alexander Krane |
| 2 | Reason for the notification |
| a) | Position/status | Chief Financial Officer |
| b) | Initial notification/Amendment | Initial notification |
| 3 | Details of the issuer, emission allowance market participant, auction platform, auctioneer or auction monitor |
| a) | Name | Harbour Energy plc |
| b) | LEI | 213800YPC42DYBKVPF97 |
| 4 | Details of the transaction(s): section to be repeated for (i) each type of instrument; (ii) each type of transaction; (iii) each date; and (iv) each place where transactions have been conducted |
| a) | Description of the financial instrument, type of instrument Identification code | Ordinary shares of 0.002 pence each
GB00BMBVGQ36 |
| b) | Nature of the transaction | (i) Vesting of Deferred Bonus Award under the 2017 LTIP (ii) Shares sold to cover tax & NI (balance of 91,021 shares retained) |
| c) | Price(s) and volume(s) | | Price(s) | Volume(s) | (i) £0.00 (ii) £2.814 | 187,210 96,189 |
|
| d) | Aggregated information
| | Price(s) | Volume(s) | | £0.00 | 187,210 | | £2.814 | 96,189 |
|
| e) | Date of the transaction | 2026-04-07 |
| f) | Place of the transaction | London Stock Exchange |