Total Voting Rights

1 May 2026

Rockhopper Exploration plc

("Rockhopper" or the "Company")

Total Voting Rights

Rockhopper Exploration plc (AIM: RKH), the oil and gas company with key interests in the North Falkland Basin, announces that it has issued 850,000 Ordinary Shares of 1 pence each (the "Shares") pursuant to the exercise of share options by an employee. The Shares were issued during April 2026 under the Company's existing block listing entitlement.

In conformity with the Financial Conduct Authority's Disclosure and Transparency Rules, the Company confirms that, as at 30 April 2026, the issued ordinary share capital of the Company consists of 862,228,880 Ordinary Shares of 1 pence each with voting rights attached (one vote per ordinary share). The Company does not hold any shares in Treasury at the date of this disclosure. The issued share capital figure can be used by shareholders as the denominator for the calculations by which to determine if they are required to notify their interest in, or a change to their interest in, the Company under the FCA's Disclosure and Transparency Rules.

Enquiries:

Rockhopper Exploration plc

Jan Davies, Company Secretary

Tel. +44 (0)20 7390 0234 (via Vigo Consulting)

Canaccord Genuity Limited (NOMAD and Joint Broker)

Henry Fitzgerald-O'Connor/James Asensio/Charlie Hammond

Tel. +44 (0) 20 7523 8000

Peel Hunt LLP (Joint Broker)

Richard Crichton/Georgia Langoulant

Tel. +44 (0) 20 7418 8900

Vigo Consulting

Patrick d'Ancona/Ben Simons/Fiona Hetherington

Tel. +44 (0) 20 7390 0234

Notes to Editors

Rockhopper Exploration plc is a UK-based oil and gas exploration and production company with key interests in the Falkland Islands. The Company holds a 35% interest in licences in the North Falkland Basin, where it has sanctioned the development of the significant Sea Lion field which was originally discovered by the Company in 2010.

Rockhopper's shares are quoted on the AIM market of the London Stock Exchange under the ticker RKH.

For more information, visit the Company's website at www.rockhopperexploration.co.uk.