26 April 2022

Rockhopper Exploration plc

("Rockhopper" or the "Company")

Ombrina Mare Arbitration Update

Rockhopper Exploration plc (AIM: RKH), the oil and gas exploration and production company with key interests in the North Falkland Basin, is pleased to announce that it has been informed that the proceedings related to the Ombrina Mare Arbitration were declared closed in accordance with Rule 38(1) of the ICSID Arbitration Rules on 25 April 2022.

Under the ICSID Arbitration Rules, the Tribunal has 120 days after closing to issue its Award, extendable by 60 days (Rule 46). The Company will update the market in due course.

Enquiries:

Rockhopper Exploration plc

Sam Moody - Chief Executive Officer

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

Canaccord Genuity Limited (NOMAD and Joint Broker)

Henry Fitzgerald-O'Connor/Gordon Hamilton

Tel. +44 (0) 20 7523 8000

Peel Hunt LLP (Joint Broker)

Richard Crichton

Tel. +44 (0) 20 7418 8900

Vigo Consulting

Patrick d'Ancona/Ben Simons/Kendall Hill

Tel. +44 (0) 20 7390 0234

The information contained within this announcement is deemed by the Company to constitute inside information as stipulated under the Market Abuse Regulations (EU) No. 596/2014 ("MAR").