Business
Transaction in Own Shares
Harbour Energy PLC has purchased 594,009 ordinary shares for cancellation as part of its share buyback programme, with the volume weighted average price paid per share being £1.9550. Following these purchases, the company's total number of ordinary shares in issue is now 1,404,868,595. This concludes the current share buyback programme, with a total of 35,254,163 shares purchased to date. Disclaimer*

About this update from Harbour Energy Plc
HARBOUR ENERGY PLC ("Harbour" or the "Company") Transaction in Own Shares Harbour announces that it has purchased the following number of its ordinary shares of 0.002 pence each for cancellation under its share buyback programme announced on 7 August 2025. Aggregated information on Shares purchased according to trading value Date of purchase Number of Shares purchased Highest price paid (GBP) Lowest price paid (GBP) Volume weighted average price paid per share (GBP) Venue 12/01/2026 460,473 1.9710 1.9290 1.9550 XLON 12/01/2026 0 0.0000 0.0000 0.0000 AQXE 12/01/2026 41,492 1.9560 1.9440 1.9523 BATE 12/01/2026 92,045 1.9700 1.9450 1.9559 CHIX 12/01/2026 0 0.0000 0.0000 0.0000 TRQX Following the purchase and cancellation of these shares, the Company's total number of ordinary shares in issue will be 1,404,868,595. This information may be used by shareholders to determine whether they are required to notify their interest, or a change to their interest, in the Company under the Financial Conduct Authority's Disclosure Guidance and Transparency Rules. To date, Harbour has purchased 35,254,163 ordinary shares in aggregate for cancellation in connection with this buyback programme. This concludes the current share buyback programme. In accordance with Article 5(1)(b) of the Market Abuse Regulation (EU) No 596/2014, as it forms part of domestic law of the United Kingdom by virtue of the European Union (Withdrawal) Act 2018 as amended, a full breakdown of the individual purchases of ordinary shares made by Bank of America on behalf of the Company as part of the buy-back programme is available via the link below. http://www.rns-pdf.londonstockexchange.com/rns/5933O_1-2026-1-12.pdf Enquiries Rachel Rickard, Company Secretary Tel: 020 7730 1111 Elizabeth Brooks, SVP Investor Relations Tel: 0 20 3833 2421 Harbour Energy plc LEI: 213800YPC42DYBKVPF97
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