Harbour Energy plc

(the "Company" or "Harbour")

Total Voting Rights

1 June 2026

As at 31 May 2026, the Company's issued share capital consisted of 1,579,798,584 Ordinary Shares of 0.002 pence with voting rights. Harbour does not hold any shares in Treasury.

The figure of 1,579,798,584 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 and Transparency Rules.

During the period 1 May 2026 to 31 May 2026, the Company issued 22,031 shares to satisfy option exercises under its Save As You Earn scheme. The shares were issued under an existing block listing admitted to the London Stock Exchange on 13 September 2024.

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