Sale of Warrants in Solid Power, Inc.

LEI: 213800HAZOW1AWRSZR47

9 October 2025

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

Sale of Warrants in Solid Power, Inc.

The Company is pleased to announce that, on 8 October 2025, it disposed of all of its remaining warrants in Solid Power, Inc. ("Solid Power"). The sale of REL's warrants generated approximately $343,000 in gross proceeds for the Company (excluding applicable taxes and expenses).

Following completion of this transaction, the Company has fully exited its investment in Solid Power. No further adjustment payments will be due to the Company's investment manager in respect of the sale of the Company's warrants in Solid Power.

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]