The following information is being disclosed for the purposes of Rule 26 of the AIM Rules for Companies.

AIM Rule 26

Rockhopper Exploration plc (“Rockhopper”) is an AIM listed oil and gas exploration company based in the UK with interests in the Falkland Islands and the Greater Mediterranean region. It was established in 2004 with a strategy to invest in and undertake an offshore oil exploration programme in the North Falkland Basin. It was floated on AIM in August 2005. Rockhopper is the largest acreage holder in the North Falkland Basin.

Rockhopper Exploration website – About Rockhopper

Rockhopper Exploration website – Committees

Rockhopper Exploration plc is incorporated in England and Wales. Its main country of operation is the Falkland Islands and it is headquartered in London.

Rockhopper Exploration plc is subject to the UK City Code on Takeovers and Mergers.

The Board of Directors’ corporate governance policy is to apply best practice and to adhere to the UK Corporate Governance Code applicable to FTSE 350 companies as far as practicable given the size of the Company. In the report and accounts, the Company gives details of how it addresses the principles set out in the UK Corporate Governance Code.

The company’s shares are not listed on any other exchanges. The company’s shares are traded on the AIM.

Rockhopper Exploration website – Shareholder Analysis

There are no restrictions on the transfer of securities.

Rockhopper Exploration website – Reports

Rockhopper Exploration website – Announcements

Rockhopper Exploration website – Advisers