Harbour Energy Regulatory News (HBR)

Harbour Energy plc

(the "Company" or "Harbour")

Total Voting Rights and Share Issuance

1 July 2026

In accordance with PRM 1.6.4R, the Company confirms that during the period from 1 June 2026 to 30 June 2026, the Company issued 436,432 ordinary shares of 0.002 pence each with voting rights (ISIN: GB00BMBVGQ36) to satisfy option exercises under its Save As You Earn scheme. The ordinary shares have been admitted to trading on the London Stock Exchange and are fungible with the Company's other ordinary shares already admitted to trading.

As at 30 June 2026, and following this share issuance, the Company's issued share capital consisted of 1,580,235,016 ordinary shares of 0.002 pence each with voting rights. Harbour does not hold any shares in Treasury.

The figure of 1,580,235,016 may be used by shareholders as the denominator for the calculations by which they may determine whether or not they are required to notify their interest in, or a change to their interest in, the share capital of the Company under the FCA's Disclosure Guidance and Transparency Rules.

EnquiriesVictoria Jackson Harbour Energy plc +44 (0) 20 7730 1111

LEI number: 213800YPC42DYBKVPF97