Harbour Energy PLC

Transaction in Own Shares • Nov 24, 2025

National Storage Mechanism | Additional information

RNS Number : 6202I

Harbour Energy PLC

24 November 2025

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
21/11/2025	321,210	2.2240	2.1640	2.1921	XLON
21/11/2025	0	0.0000	0.0000	0.0000	AQXE
21/11/2025	0	0.0000	0.0000	0.0000	BATE
21/11/2025	0	0.0000	0.0000	0.0000	CHIX
21/11/2025	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 1,418,711,480. 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 21,411,278 ordinary shares in aggregate for cancellation in connection with this 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/6202I_1-2025-11-21.pdf

Enquiries
Rachel Rickard, Company Secretary	Tel: 020 7730 1111
Elizabeth Brooks, SVP Investor Relations	Tel: 020 3833 2421

Harbour Energy plc LEI: 213800YPC42DYBKVPF97

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