Further investment into Infinitum

LEI: 213800HAZOW1AWRSZR47

 2 January 2026

THIS ANNOUNCEMENT CONTAINS INSIDE INFORMATION FOR THE PURPOSES OF ARTICLE 7 OF THE MARKET ABUSE REGULATION (EU) 596/2014 AS IT FORMS PART OF UK DOMESTIC LAW BY VIRTUE OF THE EUROPEAN UNION (WITHDRAWAL) ACT 2018, AS AMENDED

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

Further investment into Infinitum

The Company announces a further commitment of up to $5.2 million to its existing investment in Infinitum Electric Inc. ("Infinitum"), creator of the breakthrough air-core motor. Infinitum will use the investment to provide short to medium term working capital to support its operations. As at 30 September 2025, the Company's investment in Infinitum was valued at $16 million.

The board of directors of the Company (the "Board") notes that, although the Company is in managed wind-down, it retains the ability under the Company's investment policy to approve the Company undertaking capital expenditure, including, where such capital expenditure is considered necessary or desirable, to protect or enhance the value of any existing investment or to facilitate an orderly disposal.

RIGL Holdings, LP (the "Investment Manager") has advised the Board that the Company's commitment to Infinitum was required to support its operations and commercial momentum and to avoid a liquidity constraint and therefore decline in the value of the Company's investment. In making its decision, the Board has taken into account updates from the Investment Manager as to Infinitum's proposed commercial strategy and future prospects.

The Company and the Investment Manager remain focussed on realising the Company's investment in Infinitum in an orderly manner and at an appropriate time, with a view to returning the net proceeds to Shareholders in accordance with the Company's wind-down investment objective and policy.

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]