Press release

LEI: 213800HAZOW1AWRSZR47

8 October 2025

Riverstone Energy Limited (the "Company" or "REL")

Compulsory Redemption of Shares

Further to the commencement of the Company's managed wind-down on 22 August 2025 and the approval given by Shareholders on that date to allow compulsory redemptions of its ordinary shares (the "Shares") as described in the circular to Shareholders dated 1 August 2025 (the "Circular"), the Company today announces that it will return approximately £190 million by way of a compulsory partial redemption of up to 17,257,038 Shares (the "Compulsory Redemption") on 22 October 2025 (the "Redemption Date"). As at today's date, the Company has 24,591,380 Shares in issue and holds no shares in treasury.

Approximately 70 per cent. of the Company's issued share capital (excluding shares held in treasury) will be redeemed in the Compulsory Redemption. The Redemption Price per Share will be £11.01 pence, being the NAV per Share as at 30 June 2025[1], with the amount to be applied to the redemption comprising monies from the Company's existing cash balances. The Compulsory Redemption will be effected pro rata to each Shareholder's registered holding of Shares as at the close of business on the Redemption Date (the "Redemption Record Date"). Fractions of Shares will not be redeemed and so the number of Shares held by each Shareholder which are redeemed on the Redemption Date will be rounded down to the nearest whole number of Shares.

On this basis, a holder of 10,000 Shares on the Redemption Record Date will have 7,017 Shares redeemed, and will receive £77,257.17 in cash.

The Shares will be disabled in CREST after close of business on the Redemption Date and the existing ISIN GG00BBHXCL35 (the "Old ISIN") will expire at the same time.

The new ISIN GG00BSNRFW06 (the "New ISIN") in respect of the remaining Shares which have not been redeemed, and which will be in issue and listed following the Redemption Date, will be enabled and available for transactions from and including 23 October 2025.

Up to and including the Redemption Date, the Shares will continue to be traded under the Old ISIN. Any purchaser of Shares trading under the Old ISIN who is not on the register as at the Redemption Record Date will have a market claim for a proportion of the redemption proceeds. CREST will automatically transform any open transactions as at the Redemption Date into the New ISIN.

Any Shares which have traded on or before the Redemption Date, but have not settled, will be included in the Compulsory Redemption.

All Shares that are redeemed will be cancelled with effect from the Redemption Date. Accordingly, once redeemed, such Shares will be incapable of transfer.

Payments of redemption monies are expected to be effected either through CREST (in the case of Shares held in uncertificated form) or by cheque (in the case of Shares held in certificated form) within 14 Business Days of the Redemption Date, or as soon as practicable thereafter. Shareholders will be paid their redemption proceeds in Sterling.

Expected timetable for the Compulsory Redemption

Capitalised terms used but not defined in this announcement will have the same meaning as set out in the Circular.

For further details, see www.RiverstoneREL.com.

Neither the contents of Riverstone Energy Limited's website nor the contents of any website accessible from hyperlinks on the websites (or any other website) are incorporated into, or form part of, this announcement.

Media Contacts

For Riverstone Energy Limited: [email protected]

Deutsche Numis - Corporate Broker:

Hugh Jonathan

Matt Goss

+44 (0) 20 7260 1000

Ocorian Administration (Guernsey) Limited - Company Secretary:

Birgitte Horn

[email protected]