NOT FOR RELEASE, PUBLICATION OR DISTRIBUTION, IN WHOLE OR IN PART, DIRECTLY OR INDIRECTLY, IN, INTO OR FROM ANY JURISDICTION WHERE TO DO SO WOULD CONSTITUTE A VIOLATION OF THE RELEVANT LAWS OR REGULATIONS OF SUCH JURISDICTION.

THIS ANNOUNCEMENT IS NOT A PROSPECTUS OR PROSPECTUS EQUIVALENT DOCUMENT AND INVESTORS SHOULD NOT MAKE ANY INVESTMENT DECISION IN RELATION TO THE ORDINARY SHARES EXCEPT ON THE BASIS OF THE INFORMATION IN THE PROSPECTUS.

FOR IMMEDIATE RELEASE

12 August 2026

EnQuest PLC

("EnQuest", "the Company" or "the EnQuest Group")

Satisfaction of conditions precedent to completion of the Proposed Acquisitions

On 10 June 2026, EnQuest announced the acquisition of Participating Interests in four PSCs in Malaysia (the "Proposed Acquisitions"). On completion, these will deliver an immediate step change in Group production, reserves and cash flow, alongside significant future growth opportunities.

EnQuest is today pleased to announce that all conditions precedent to completion of the Proposed Acquisitions have been satisfied in full, namely:

i.      Passing of the Resolution at the General Meeting, announced on 11 August 2026; and

ii.     PETRONAS having issued the PETRONAS Farmout Approval.

These steps follow receipt of waivers from the existing PSC partners of their pre-emption rights in relation to Package 2 (announced on 10 July 2026) and publication of the combined circular and prospectus (the "Prospectus") in relation to the Proposed Acquisitions (released on 24 July 2026).

EnQuest continues to expect completion of the Proposed Acquisitions to occur on 31 December 2026, with the economic effective date of the Proposed Acquisitions on 1 January 2027.

As previously announced, application will be made for the readmission of the entire issued share capital of EnQuest ("Ordinary Shares") to the Equity Shares (Commercial Companies) category of the Official List of the Financial Conduct Authority and to trading on the London Stock Exchange plc's main market for listed securities ("Readmission"). Readmission is expected to take place at 8am on or around 4 January 2027.

Unless otherwise defined, all definitions used in this announcement have the same meanings as set out in the Prospectus.

Contacts:

Notes to editors

EnQuest is unlocking value from energy assets. Responsibly. As an independent energy company with operations in the UK North Sea and across South East Asia, the EnQuest Group's strategic vision is to lead as a safe, efficient operator of mature and underinvested oil and gas assets; sustainably extending field lives and delivering superior value across the asset lifecycle, as part of a just energy transition.

EnQuest PLC trades on the London Stock Exchange.

Please visit our website www.EnQuest.com for more information on our global operations

Forward-looking statements: This announcement may contain certain forward-looking statements with respect to EnQuest's expectations and plans, strategy, management's objectives, future performance, production, reserves, costs, revenues and other trend information. These statements and forecasts involve risk and uncertainty because they relate to events and depend upon circumstances that may occur in the future. There are a number of factors which could cause actual results or developments to differ materially from those expressed or implied by these forward-looking statements and forecasts. The statements have been made with reference to forecast price changes, economic conditions and the current regulatory environment. Nothing in this announcement should be construed as a profit forecast or estimate and no statement in this announcement should be interpreted to mean that earnings, earnings per share or income, cash flow from operations or free cash flow for the EnQuest Group or the Enlarged Group, as appropriate, for the current or future years would necessarily match or exceed the amount set out in any forward-looking statement or historical published earnings, earnings per share or income, cash flow from operations or free cash flow for the EnQuest Group or the Enlarged Group, as appropriate. Past share performance cannot be relied upon as a guide to future performance.

Important Notices: Peel Hunt LLP ("Peel Hunt"), which is authorised and regulated in the United Kingdom by the FCA, is acting exclusively for the Company as Sponsor and no one else in connection with the Proposed Acquisitions and it will not regard any other person as a client in relation to the Proposed Acquisitions and neither Peel Hunt nor any of its affiliates (nor any of their partners, directors, officers, employees, advisers or agents) will be responsible to anyone other than the Company for providing the protections afforded to its clients or for providing advice in relation to the Proposed Acquisitions or any other transaction, matter, or arrangement referred to in this announcement.

This announcement has been issued by, and is the sole responsibility of, the Company. No representation or warranty, express or implied, is or will be made as to, or in relation to, and no responsibility or liability whatever (whether direct or indirect, whether in contract, in tort, under statute or otherwise) is or will be accepted by Peel Hunt or any other advisers to the Company or by any of their respective affiliates, partners, directors, officers, employees, advisers or agents as to or in relation to, the accuracy or completeness of this announcement or any other written or oral information made available to or publicly available to any interested party or its advisers, and any liability therefore is expressly disclaimed.

The statements contained in this announcement are made as at the date of this announcement, unless some other time is specified in relation to them, and publication of this announcement shall not give rise to any implication that there has been no change in the facts set forth in this announcement since such date.

The contents of this announcement are for information purposes only and are not to be construed as legal, business or tax advice. Each shareholder should consult its own legal adviser, financial adviser or tax adviser for legal, financial or tax advice, respectively.

Neither the content of the Company's website nor any website accessible by hyperlinks on the Company's website is incorporated in, or forms part of, this announcement.