Results of Placing & Restoration of Trading

Rockhopper Exploration plc (AIM: RKH), the oil and gas company with key interests in the North Falkland Basin, is pleased to announce that the Company has raised approximately US$180 million (approximately £132.4 million) through the placing of 189,210,582 New Ordinary Shares (the "Placing Shares") with existing and new institutional investors at a fixed price of 70 pence per share (the "Issue Price") via an accelerated bookbuild (the "Placing").

The Placing attracted strong demand from existing and new institutional investors and was significantly oversubscribed at the Issue Price.

Canaccord Genuity Limited ("Canaccord") and Peel Hunt LLP ("Peel Hunt") acted as Joint Bookrunners in connection with the Placing.

The Placing Shares being issued represent approximately 22% of the existing issued ordinary share capital of the Company prior to the Placing. The Placing was conducted using the Company's existing share authorities.

Open Offer

As detailed in the Company's announcement of 27 August 2026 titled "Proposed Capital Raising", the Company has also launched an Open Offer to provide Qualifying Shareholders with the opportunity to subscribe for New Ordinary Shares at the Issue Price. A circular containing full details of the Open Offer and the expected timetable will be posted to Shareholders on 28 August 2026 and made available on the Company's website shortly thereafter.

Sam Moody, CEO of Rockhopper Exploration plc, said:

"We are delighted with the strong response from investors. The support reflects the compelling opportunity presented by Sea Lion and the value uplift to project Net Present Value, as highlighted in yesterday's announcement. We are also pleased to offer qualifying shareholders the opportunity to participate in this exciting development through the Open Offer."

Capital Access Window & Restoration of Trading

As detailed in the Company's announcement of 24 August 2026 titled "Sea Lion Update & Potential Capital Raise", the Company entered a Capital Access Window at 7:45 a.m. BST on 24 August 2026, in order to reach a broader range of investors during the Placing.

Following the results of the Placing, the Capital Access Window has now closed and normal trading in the Company's existing Ordinary Shares is expected to resume at 7:30 a.m. BST on 28 August 2026.

Admission & Total Voting Rights

Application has been made to the London Stock Exchange for the Placing Shares to be admitted to trading on AIM and admission is expected to become effective on or around 8.00 a.m. on 2 September 2026 ("Admission").

The Company confirms that, upon Admission of the Placing Shares to be issued pursuant to the Placing, the issued ordinary share capital of the Company will consist of 1,051,439,462 Ordinary Shares of 1 pence each in the capital of the Company and there will be no Ordinary Shares held in treasury. This issued share capital figure can be used by Shareholders as the denominator for the calculations by which they will determine if they are required to notify their interest in, or a change to their interest in, the Company under the FCA's Disclosure Guidance and Transparency Rules.

Other than where defined, capitalised terms used in this announcement have the meanings given to them in the announcement titled "Proposed Capital Raising" released by the Company at 7:00 a.m. BST on 27 August 2026.