<div id="readability-page-1">PUBLIC OPENING POSITION DISCLOSURE/DEALING DISCLOSURE BY A PERSON WITH INTERESTS IN RELEVANT SECURITIES REPRESENTING 1% OR MORE Rule 8.3 of the Takeover Code (the “Code”)<div>1.KEY INFORMATION (a)Full name of discloser:Dimensional Fund Advisors Ltd. in its capacity as investment advisor and on behalf its affiliates who are also investment advisors (” Dimensional”). Dimensional expressly disclaims beneficial ownership of the shares described in this form 8.3. (b)Owner or controller of interests and short positions disclosed, if different from 1(a): The naming of nominee or vehicle companies is insufficient. For a trust, the trustee(s), settlor and beneficiaries must be named. (c)Name of offeror/offeree in relation to whose relevant securities this form relates: Use a separate form for each offeror/offereeEnQuest PLC (d)If an exempt fund manager connected with an offeror/offeree, state this and specify identity of offeror/offeree: (e)Date position held/dealing undertaken: For an opening position disclosure, state the latest practicable date prior to the disclosure19 March 2025 (f)In addition to the company in 1(c) above, is the discloser making disclosures in respect of any other party to the offer? If it is a cash offer or possible cash offer, state “N/A”YES Serica Energy PLC 2.POSITIONS OF THE PERSON MAKING THE DISCLOSURE If there are positions or rights to subscribe to disclose in more than one class of relevant securities of the offeror or offeree named in 1(c), copy table 2(a) or (b) (as appropriate) for each additional class of relevant security. (a)Interests and short positions in the relevant securities of the offeror or offeree to which the disclosure relates following the dealing (if any) Class of relevant security:5p ordinary (GB00B635TG28) InterestsShort Positions Number%Number% (1)Relevant securities owned and/or controlled:53,876,6642.90 % (2)Cash-settled derivatives: (3)Stock-settled derivatives (including options) and agreements to purchase/sell: Total53,876,664*2.90 % * Dimensional Fund Advisors LP and/or its affiliates do not have discretion regarding voting decisions in respect of 103,993 shares that are included in the total above. All interests and all short positions should be disclosed.Details of any open stock-settled derivative positions (including traded options), or agreements to purchase or sell relevant securities, should be given on a Supplemental Form 8 (Open Positions). (b)Rights to subscribe for new securities (including directors’ and other employee options) Class of relevant security in relation to which subscription right exists: Details, including nature of the rights concerned and relevant percentages: 3.DEALINGS (IF ANY) BY THE PERSON MAKING THE DISCLOSURE Where there have been dealings in more than one class of relevant securities of the offeror or offeree named in 1(c), copy table 3(a), (b), (c) or (d) (as appropriate) for each additional class of relevant security dealt in.The currency of all prices and other monetary amounts should be stated. (a)Purchases and sales Class of relevant securityPurchase/saleNumber of securitiesPrice per unit 5p ordinary (GB00B635TG28) Sale71,576.1291 GBP (b)Cash-settled derivative transactions Class of relevant securityProduct description e.g. CFDNature of dealing e.g. opening/closing a long/short position, increasing/reducing a long/short positionNumber of reference securitiesPrice per unit (c)Stock-settled derivative transactions (including options) (i)Writing, selling, purchasing or varying Class of relevant securityProduct description e.g. call optionWriting, purchasing, selling, varying etc.Number of securities to which option relatesExercise price per unitType e.g. American, European etc.Expiry dateOption money paid/ received per unit (ii)Exercise Class of relevant securityProduct description e.g. call optionExercising/ exercised againstNumber of securitiesExercise price per unit (d)Other dealings (including subscribing for new securities) Class of relevant securityNature of dealing e.g. subscription, conversionDetailsPrice per unit (if applicable) 4.OTHER INFORMATION (a)Indemnity and other dealing arrangements Details of any indemnity or option arrangement, or any agreement or understanding, formal or informal, relating to relevant securities which may be an inducement to deal or refrain from dealing entered into by the person making the disclosure and any party to the offer or any person acting in concert with a party to the offer: Irrevocable commitments and letters of intent should not be included. If there are no such agreements, arrangements or understandings, state “none” None (b)Agreements, arrangements or understandings relating to options or derivatives Details of any agreement, arrangement or understanding, formal or informal, between the person making the disclosure and any other person relating to: (i) the voting rights of any relevant securities under any option; or (ii) the voting rights or future acquisition or disposal of any relevant securities to which any derivative is referenced: If there are no such agreements, arrangements or understandings, state “none” None (c)Attachments Is a Supplemental Form 8 (Open Positions) attached?NO Date of disclosure20 March 2025 Contact nameThomas Hone Telephone number+44 20 3033 3419 </div>Public disclosures under Rule 8 of the Code must be made to a Regulatory Information Service.The Panel’s Market Surveillance Unit is available for consultation in relation to the Code’s disclosure requirements on +44 (0) 20 7638 0129.The Code can be viewed on the Panel’s website at www.thetakeoverpanel.org.uk.</div>

Dimensional Fund Advisors Ltd. disclosed an opening position in EnQuest PLC, holding 53,876,664 ordinary shares, representing 2.90% of the company. The disclosure was made under Rule 8.3 of the Takeover Code, with the position held as of March 19, 2025. Additionally, Dimensional reported a sale of 71,576 shares at a price of 0.1291 GBP. The disclosure was made on March 20, 2025, by Thomas Hone, with no other agreements or arrangements noted.

Dimensional Fund Advisors Ltd. : Form 8.3 - ENQUEST PLC - Ordinary Shares