[424B7] Diversified Energy Co PLC Prospectus Filed Pursuant to Rule 424(b)(7)

Rhea-AI Filing Summary

Diversified Energy Company PLC (DEC) is the subject of a prospectus supplement describing a selling-stockholder offering of 5,713,353 ordinary shares (£0.20 nominal). The shares trade on the NYSE and LSE under the symbol DEC; the last reported sale prices on September 15, 2025 were $15.20 on the NYSE and £11.31 on the LSE (approx. $15.37 using an assumed exchange rate). The Diversified Employee Benefit Trust indicated interest to purchase up to 750,000 shares at the public offering price but made no firm commitment. Underwriters have a 30-day over-allotment option to buy up to 857,002 additional shares to cover over-allotments. The company is a foreign private issuer through December 31, 2025 (transitioning to domestic reporting in 2026) and discloses extensive risk factors including commodity price volatility, integration risks from recent acquisitions, capital and liquidity constraints, environmental and regulatory risks, and potential tax complexities including possible double taxation given U.S. federal tax treatment.

Positive

• Established trading on two major exchanges (NYSE and LSE) provides liquidity and broader investor access.
• EBT indicated interest to purchase up to 750,000 shares at the public offering price (non-binding).
• Over-allotment option of 857,002 shares gives underwriters flexibility to stabilize the offering and meet demand.

Negative

• Selling-stockholder offering of 5,713,353 shares increases available share supply and could pressure the market price.
• Extensive risk disclosures including commodity price volatility, acquisition integration risks, capital and liquidity constraints, and regulatory/environmental exposures.
• Tax complexity: Company treated as a U.S. corporation for U.S. federal tax purposes, creating potential double taxation or foreign tax credit limitations for investors.

Insights

Financial Analyst

TL;DR: This is a selling-stockholder offering that increases share supply; material underwriter over-allotment and EBT interest are notable but not company-funded dilution.

The prospectus describes a secondary sale of 5,713,353 ordinary shares by selling stockholders, with a standard 30-day over-allotment option for 857,002 additional shares. Price references (Sept 15, 2025) are $15.20 (NYSE) and £11.31 (LSE). The Diversified Employee Benefit Trust expressed non-binding interest for up to 750,000 shares. From an investor-impact standpoint this is primarily a liquidity event for selling holders rather than a capital raise for the company; however, increased share supply and potential aftermarket selling could exert downward pressure on the market price. The underwriters' stabilization and short-covering activities are standard mitigants. The filing also highlights significant operational and market risks (commodity price volatility, integration of acquired assets, and capital access) that remain relevant to valuation.

Corporate Governance Expert

TL;DR: The filing highlights governance and disclosure changes tied to the foreign private issuer status and shareholder transfer mechanics under UK law.

The prospectus underscores that the company is a foreign private issuer through Dec 31, 2025 and will adopt full domestic U.S. reporting thereafter, which may increase disclosure frequency and change insider reporting obligations. The document details shareholder rights under UK corporate law (one vote per ordinary share, share register maintenance, preemptive rights subject to articles) and restrictions (Section 793 notice consequences, voting limitations for default shares). These disclosures are material for shareholders assessing voting power, transferability, and future governance transparency. Tax characterization (treated as a U.S. corporation under Section 7874) and possible double taxation concerns are also governance-relevant for capital allocation and investor relations policies.

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The information in this preliminary prospectus supplement is not complete and may be changed. This preliminary prospectus supplement and the accompanying base prospectus are not an offer to sell, and we are not soliciting an offer to buy these securities in any jurisdiction where the offer or sale is not permitted.

Filed Pursuant to Rule 424(b)(7)

Registration No. 333-287373

SUBJECT TO COMPLETION, DATED SEPTEMBER 16, 2025

PRELIMINARY PROSPECTUS SUPPLEMENT

(To Prospectus Dated May 16, 2025)

5,713,353 Ordinary Shares

Diversified Energy Company PLC

$   per ordinary share

The selling stockholders identified in this prospectus supplement are offering 5,713,353 of our ordinary shares (£0.20 nominal par value). Our ordinary shares trade on the New York Stock Exchange (“NYSE”) under the symbol “DEC.” On September 15, 2025, the last reported sale price of our ordinary shares on the NYSE was $15.20 per ordinary share. Our ordinary shares are also admitted to listing on the Official List of the United Kingdom Financial Conduct Authority and are admitted to trading on the Main Market of the London Stock Exchange (“LSE”), under the symbol “DEC.” On September 15, 2025, the last reported sale price of our ordinary shares on the LSE was £11.31 per ordinary share (equivalent to approximately $15.37 per ordinary share based on an assumed exchange rate of £1.00 to $1.3590).

We are a “foreign private issuer” as defined under the U.S. federal securities laws and, as such, are subject to reduced public company disclosure requirements. See the subsection titled “Summary—Implications of Being a Foreign Private Issuer” on page S-7 for additional information.

Investing in our ordinary shares involves risks. See “Risk Factors” beginning on page S-9 of this prospectus supplement, page 6 of the accompanying base prospectus, and in the documents we incorporate by reference into this prospectus supplement and the accompanying base prospectus to read about important facts you should consider before buying our ordinary shares.

			Per Ordinary Share			Total
Public offering price
Underwriting discount(1)
Proceeds, before expenses, to the selling stockholders

(1)
See “Underwriting” for a description of the compensation payable to the underwriters.

Neither the U.S. Securities and Exchange Commission (“SEC”) nor any state securities commission has approved or disapproved of these securities or determined if this prospectus supplement or the accompanying base prospectus is truthful or complete. Any representation to the contrary is a criminal offense.

The Diversified Employee Benefit Trust (the “EBT”), which is operated through a third-party trustee, has indicated an interest to participate and purchase up to 750,000 ordinary shares being sold in the offering at a price per ordinary share equal to the public offering price, although no commitment to purchase has been made. Please see our Annual Report on Form 20-F for the year ended December 31, 2024 for additional information on the EBT.

The selling stockholders have granted the underwriters an option to purchase up to an additional 857,002 ordinary shares, solely to cover over-allotments, at the public offering price set forth above, less the underwriting discount, within 30 days from the date of this prospectus supplement.

The underwriters expect to deliver the ordinary shares to the purchasers on or about     , 2025 through the book-entry facilities of The Depository Trust Company.

Joint Book-Running Managers

Mizuho Raymond James

Citigroup

   , 2025.

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PROSPECTUS SUPPLEMENT

			Page
ABOUT THIS PROSPECTUS SUPPLEMENT			S-1
PRESENTATION OF FINANCIAL INFORMATION			S-2
SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS			S-3
SUMMARY			S-6
RISK FACTORS			S-9
USE OF PROCEEDS			S-11
SELLING STOCKHOLDERS			S-12
MATERIAL TAX CONSEQUENCES			S-14
UNDERWRITING			S-23
LEGAL MATTERS			S-28
EXPERTS			S-29
WHERE YOU CAN FIND MORE INFORMATION			S-30
INCORPORATION OF CERTAIN INFORMATION BY REFERENCE			S-31
EXPENSES OF THE OFFERING			S-32

PROSPECTUS

			Page
ABOUT THIS PROSPECTUS			1
SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS			2
DIVERSIFIED ENERGY COMPANY PLC			5
RISK FACTORS			6
USE OF PROCEEDS			7
SELLING SHAREHOLDERS			8
DESCRIPTION OF SHARE CAPITAL AND ARTICLES OF ASSOCIATION			10
MATERIAL TAX CONSEQUENCES			28
PLAN OF DISTRIBUTION			37
EXPENSES			39
LEGAL MATTERS			40
EXPERTS			40
SERVICE OF PROCESS AND ENFORCEMENT OF CIVIL LIABILITIES			41
WHERE YOU CAN FIND MORE INFORMATION			43
INCORPORATION OF CERTAIN INFORMATION BY REFERENCE			44

For investors outside the United States: We have not, and the underwriters and the selling stockholders have not done anything that would permit this offering or possession or distribution of this prospectus supplement and the accompanying base prospectus in any jurisdiction, other than the United States, where action for that purpose is required. Persons outside the United States who come into possession of this prospectus supplement and the accompanying base prospectus must inform themselves about, and observe any restrictions relating to, the offering of our ordinary shares and the distribution of this prospectus supplement and the accompanying base prospectus outside the United States.

Neither we nor the underwriters nor selling stockholders have authorized anyone to provide you with any information or to make any representations other than those contained in or incorporated by reference into this prospectus supplement, the accompanying base prospectus, or in any free writing prospectus we have prepared, and neither we nor the underwriters nor selling stockholders take responsibility for, and can provide no assurance as to the reliability of, any other information others may give you. Neither we nor the underwriters nor selling stockholders are making an offer to sell, or seeking offers to buy, these securities in any jurisdiction where the offer or sale is not permitted. The information contained in this prospectus supplement and the accompanying base prospectus, as well as the information

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we previously filed with the SEC and incorporated herein by reference, is accurate as of the date of those documents only, regardless of the time of delivery of this prospectus supplement or the sale of ordinary shares. Our business, financial condition, results of operations and prospects may have changed since such dates.

Notice to Investors

This document is not a prospectus for the purposes of the U.K. version of Regulation (EU) 2017/1129 as it forms part of domestic law by virtue of the European Union (Withdrawal) Act 2018, as amended (the “U.K. Prospectus Regulation”) and has not been reviewed and/or approved by the United Kingdom Financial Conduct Authority or any other regulatory authority in the United Kingdom.

No ordinary shares have been offered or will be offered pursuant to the offering to the public in the United Kingdom, except that the ordinary shares may be offered to the public in the United Kingdom at any time:

(a)
to any legal entity which is a qualified investor as defined under Article 2 of the U.K. Prospectus Regulation;

(b)
to fewer than 150 natural or legal persons (other than qualified investors as defined under Article 2 of the U.K. Prospectus Regulation), subject to obtaining the prior consent of the underwriters for any such offer; or

(c)
in any other circumstances falling within Section 86 of the Financial Services and Markets Act, 2000, as amended (“FSMA”),

provided that no such offer of the shares shall require the Company or any underwriter to publish a prospectus pursuant to Section 85 of the FSMA or supplement a prospectus pursuant to Article 23 of the U.K. Prospectus Regulation.

For the purposes of this provision, the expression an “offer to the public” in relation to the ordinary shares in the United Kingdom means the communication in any form and by any means of sufficient information on the terms of the offer and any ordinary shares to be offered so as to enable an investor to decide to purchase or subscribe for any ordinary shares.

In addition, in the United Kingdom, this document is for distribution only to, and is directed only at, and any offer subsequently made may only be directed at persons who are “qualified investors” (as defined in the U.K. Prospectus Regulation) (i) who have professional experience in matters relating to investments falling within Article 19(5) of the Financial Services and Markets Act 2000 (Financial Promotion) Order 2005, as amended (the “Order”), (ii) who are high net worth entities or other persons falling within Article 49(2)(a) to (d) of the Order, or (iii) who are persons to whom an invitation or inducement to engage in investment activity (within the meaning of section 21 of the FSMA) in connection with the issue or sale of any ordinary shares may otherwise lawfully be communicated or caused to be communicated (all such persons together being referred to as “relevant persons”). This document is directed only at relevant persons and must not be acted on or relied on by persons who are not relevant persons. In the United Kingdom, any investment or investment activity that this document relates to may be made or taken exclusively by relevant persons.

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ABOUT THIS PROSPECTUS SUPPLEMENT

This prospectus supplement and the accompanying base prospectus are part of a registration statement that we filed with the SEC using a “shelf” registration process. We are providing information to you about the sale of the ordinary shares offered hereby in separate documents that are bound together: (1) this prospectus supplement, which describes the specific details regarding the sale of the ordinary shares offered hereby, and (2) the accompanying base prospectus, which provide general information regarding us, the selling stockholders, our securities, and other information, some of which may not apply to the sale of the ordinary shares offered hereby. If information in this prospectus supplement is inconsistent with the accompanying base prospectus, you should rely on this prospectus supplement. However, if any statement in one of these documents is inconsistent with a statement in a document incorporated by reference in this prospectus supplement having a later date, the statement in the document having the later date modifies or supersedes the earlier statement as our business, financial condition, results of operations and prospects may have changed since the earlier date.

You should read this prospectus supplement, together with the accompanying base prospectus, the documents incorporated by reference in this prospectus supplement and the accompanying base prospectus and any free writing prospectus that we have authorized for use in connection with the sale of the ordinary shares offered hereby before making an investment decision. You should also read and consider the information in the documents referred to in the sections of this prospectus supplement and the accompanying base prospectus entitled “Where You Can Find More Information” and “Incorporation of Certain Information by Reference.”

No action is being taken in any jurisdiction outside the United States to permit a public offering of our ordinary shares or possession or distribution of this prospectus supplement and accompanying base prospectus in that jurisdiction. Persons who come into possession of this prospectus supplement and accompanying base prospectus in jurisdictions outside the United States are required to inform themselves about and to observe any restrictions as to this offering and the distribution of this prospectus supplement and accompanying base prospectus applicable to that jurisdiction.

The information appearing in this prospectus supplement, the accompanying base prospectus, the documents incorporated by reference in this prospectus supplement, and in any free writing prospectus that we have authorized for use in connection with the sale of the ordinary shares offered hereby is accurate only as of its respective date, regardless of the time of delivery of the respective document or of any sale of securities covered by this prospectus supplement. You should not assume that the information contained in or incorporated by reference in this prospectus supplement, in the accompanying base prospectus or in any free writing prospectus that we have authorized for use in connection with the sale of the ordinary shares offered hereby, is accurate as of any date other than the respective dates thereof.

Except where the context otherwise requires or where otherwise indicated, the terms “Diversified Energy,” the “Company,” the “Group,” “we,” “us,” “our company” and “our business” refer to Diversified Energy Company PLC, together with its consolidated subsidiaries. References in this prospectus supplement to the “selling stockholders” refer to the entities identified in the selling stockholders table included in the section of this prospectus supplement entitled “Selling Stockholders.”

For the convenience of the reader, in this prospectus supplement, unless otherwise indicated, translations from pound sterling into U.S. dollars were made at the rate of £1.00 to $1.3590, which was the daily spot exchange rate of the Bank of England on September 15, 2025. Such U.S. dollar amounts are not necessarily indicative of the amounts of U.S. dollars that could actually have been purchased upon exchange of pound sterling at the dates indicated or any other date.

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PRESENTATION OF FINANCIAL INFORMATION

This prospectus supplement incorporates by reference our audited consolidated financial statements as of December 31, 2024 and 2023 and for the years ended December 31, 2024, 2023 and 2022 included in our annual report on Form 20-F for the year ended December 31, 2024, filed with the SEC on March 17, 2025, and prepared in accordance with IFRS, as issued by the IASB, as well as our unaudited interim condensed consolidated financial statements as of June 30, 2025 and for the six months ended June 30, 2025 and 2024 included in our report on Form 6-K furnished to the SEC on August 11, 2025, which have been prepared in accordance with IAS 34 ‘Interim Financial Reporting’, as issued by the IASB, which differ in certain significant respects from U.S. GAAP. None of our financial statements were prepared in accordance with U.S. GAAP.

This prospectus supplement incorporates by reference the audited historical statement of revenues and direct operating expenses for the natural gas and oil properties of OCM Denali Holdings, Inc. (“OCM”) for the year ended December 31, 2023, and the audited consolidated financial statements of Maverick Natural Resources, LLC (“Maverick”) as of December 31, 2024 and 2023 and for each of the two years in the period ended December 31, 2024, each of which were prepared in accordance with U.S. GAAP.

This prospectus supplement incorporates by reference unaudited pro forma condensed combined financial information of the Company for the year ended December 31, 2024, which such financial information has been derived from the historical consolidated financial statements of the Company, Maverick and OCM. Since the financial statements of Maverick and OCM were prepared in accordance with U.S. GAAP, while the Company prepares its financial statements in accordance with IFRS, certain adjustments were made to the financial statements of Maverick and OCM in the pro forma financial information to conform to the Company’s IFRS presentation.

The financial information included or incorporated by reference in this prospectus supplement is presented in U.S. dollars. Our fiscal year begins on January 1 and ends on December 31 of the same year.

All references in this prospectus supplement to “$” mean U.S. dollars and all references to “£” mean pound sterling. We have made rounding adjustments to some of the figures included in this prospectus supplement. Accordingly, numerical figures shown as totals in some tables may not be an arithmetic aggregation of the figures that preceded them.

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SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS

This prospectus supplement and the documents incorporated by reference herein and therein contain forward-looking statements that are based on our management’s beliefs and assumptions and on information currently available to our management. In some cases, you can identify forward-looking statements by the following words: “may,” “might,” “will,” “could,” “would,” “should,” “expect,” “plan,” “anticipate,” “intend,” “seek,” “believe,” “estimate,” “predict,” “potential,” “continue,” “contemplate,” “possible” or the negative of these terms or other comparable terminology, although not all forward-looking statements contain these words. Forward-looking statements are not guarantees of performance. We have based forward-looking statements in this prospectus supplement on our current expectations and beliefs about future developments and their potential effect on us.

These statements in this prospectus supplement and the documents incorporated by reference herein include, but are not limited to, statements about this offering and the Company’s future plans, expectations, objectives for the Company’s operations, including statements about strategy, synergies, expansion projects, acquisitions and divestitures, future operations; sustainability-related goals, strategies and initiatives, including, among others, those relating our diversity representation targets, reducing methane and greenhouse gas emissions (“GHG”), including our Scope 1 and Scope 2 or net zero goals, environmental management, waste management, safety and asset integrity, health and safety, and community investment and engagement; our plans to achieve our sustainability-related goals and to monitor and report progress; sustainability-related engagement, commitments, and disclosure; our status as a foreign private issuer under the U.S. Securities Exchange Act of 1934, as amended (“Exchange Act”); and other related items. While this prospectus supplement and the information incorporated by reference herein describe potential future events and matters that may be significant, and with respect to which we may even use the word “material” or “materiality,” the potential significance of these events and matters should not be read as equating to “materiality” as the concept is used in connection with our required disclosures made in response to SEC and exchange rules and regulations.

Any forward-looking statement made by us in this prospectus supplement or incorporated by reference herein speaks only as of the date on which it is made. Factors or events that could cause our actual results to differ may emerge from time to time, and it is not possible for us to predict all of them. Moreover, while the documents incorporated by reference herein may contain information on several sustainability-related topics, including goals and ambitions, there are inherent uncertainties in providing such information, due to the complexity and novelty of many methodologies established for collecting, measuring, and analyzing sustainability-related data. While we anticipate continuing to monitor and report on certain sustainability-related information, we cannot guarantee that such data will be consistent year-to-year, as methodologies and expectations continue to evolve. Additionally, some of the data provided in the documents incorporated by reference herein may be estimated or reliant on estimated information, which is inherently imprecise, and we cannot guarantee that estimates are identified as such in every instance. Furthermore, there are sources of uncertainty and limitations that exist that are beyond our control and could impact our plans and timelines, including the reliance on technological and regulatory advancements and market participants’ behaviors and preferences. We undertake no obligation to publicly update any forward-looking statement whether as a result of new information, future development, or otherwise, except as may be required by law. In some cases, the information in the documents incorporated by reference herein is prepared, or based on information prepared, by government agencies or third-party vendors and consultants and is not independently verified by the Company. Furthermore, unless explicitly noted in each instance where it occurs, the relevant sustainability-related data provided in the documents incorporated by reference herein has not been audited or subject to any third-party assurance process. This data should not be interpreted as any form of guarantee or assurance of accuracy, future results or trends, and we make no representation or warranty as to third-party information.

These statements involve risks, uncertainties and other factors that may cause our actual results, levels of activity, performance or achievements to be materially different from the information expressed or implied by these forward-looking statements. Although we believe that we have a reasonable basis for each forward-looking statement contained in this prospectus supplement and the documents incorporated by reference herein, we caution you that these statements are based on a combination of facts and factors currently known by us and our projections of the future, about which we cannot be certain. Forward-looking statements contained in this prospectus supplement and the documents incorporated by reference herein are inherently subject to significant business, economic, competitive, regulatory and other risks and uncertainties (some of which are beyond our control) and assumptions that could cause our actual results to differ materially from our historical experience

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and present expectations or projections. We caution you that assumptions, beliefs, expectations, intentions and projections about future events may and often do vary materially from actual results. Therefore, we cannot assure you that actual results will not differ materially from those expressed or implied by our forward-looking statements. Known material factors that could cause actual results to differ from those expressed in or implied by forward-looking statements contained in this prospectus supplement or incorporated by reference herein are described in the section titled “Strategic Report—Risk Factors” in our annual report on Form 20-F for the year ended December 31, 2024, filed with the SEC on March 17, 2025, and the risk factors included in Appendix 1 of Exhibit 99.1 in our report on Form 6-K, furnished to the SEC on September 9, 2025, which are each incorporated by reference herein, and our other filings with the SEC that are incorporated by reference in this prospectus supplement. Such factors include, but are not limited to:

• our ability to integrate effectively the assets we acquired from Maverick into our existing operations and risks relating to the pending acquisition (the “Pending Acquisition”) of Canvas Energy Inc. (“Canvas”);

• declines in, the sustained depression of, or increased volatility in the prices we receive for our natural gas, oil and natural gas liquids (“NGLs”), or increases in the differential between index natural gas, oil and NGL prices and prices received;

• operating risks, including risks related to properties where we do not serve as the operator;

• the adequacy of our capital resources and liquidity, including access to additional borrowing capacity under our Credit Facility and the ability to obtain future financing on commercially reasonable terms or at all;

• the impact of actual or anticipated changes in tariffs and trade policies;

• the effects of and changes in government regulation, permitting and other legal requirements, including, but not limited to, new legislation;

• laws and regulations relating to climate change and GHG emissions and physical risks associated with climate change;

• attention to sustainability matters and conservation measures and risks related to our public statements with respect to such matters that may be subject to heightened scrutiny from public and governmental authorities, risks that we may face regarding potentially conflicting anti-environmental, social and governance initiatives from U.S., state or U.K./European governments, which could lead to increased litigation risk from private parties and governmental authorities or regulatory bodies or increased costs of compliance;

• potential liability resulting from pending or future litigation, government investigations and other proceedings;

• the effects of environmental, natural gas, oil and NGL related and occupational health and safety laws and regulations, including, but not limited to delays, curtailment or cessation of operations or exposure to material costs and liabilities;

• difficult and adverse conditions in the domestic and global capital and credit markets and economies, including effects of diseases, political instability, including but not limited to instability related to the military conflict in Ukraine and in Israel and surrounding countries, and pricing and production decisions;

• the geographic concentration of our operations;

• potential financial losses or earnings reductions resulting from our commodity price risk management program or any inability to manage our commodity price risks;

• the failure by counterparties to our derivative risk management activities to perform their obligations;

• shortages of oilfield equipment, supplies, services and qualified personnel and increased costs for such equipment, supplies, services and personnel;

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• access to pipelines, storage platforms, shipping vessels and other means of transporting and storing and refining gas and oil, including without limitation, changes in availability of, and access to, pipeline usage;

• risks and liabilities associated with acquired properties, including, but not limited to, the assets acquired in our most recent acquisitions and any future acquisitions;

• uncertainties about the estimated quantities of our natural gas, oil and NGL reserves;

• uncertainties about our ability to replace reserves;

• our ability to generate environmental credits attributable through the production of coal mine methane;

• our hedging strategy;

• competition in the natural gas, oil and NGL industry;

• our substantial existing indebtedness; and

• risks related to and the effects of actual or anticipated health emergencies or pandemics.

Reserve engineering is a process of estimating underground accumulations of natural gas, oil and NGLs that cannot be measured in an exact way. The accuracy of any reserve estimate depends on the quality of available data, the interpretation of such data and price and cost assumptions made by our reserve engineers. In addition, the results of drilling, testing and production activities may justify revisions of estimates that were made previously. If significant, such revisions would change the schedule of any further production and development drilling. Accordingly, reserve and pre-tax present value discounted at ten percent (PV-10) estimates may differ significantly from the quantities of natural gas, oil and NGLs that are ultimately recovered.

In addition, statements that “we believe” and similar statements reflect our beliefs and opinions on the relevant subject. These statements are based upon information available to us as of the date of this prospectus supplement, and although we believe such information forms a reasonable basis for such statements, such information may be limited or incomplete, and our statements should not be read to indicate that we have conducted a thorough inquiry into, or review of, all potentially available relevant information. These statements are inherently uncertain, and investors are cautioned not to unduly rely upon these statements. Furthermore, if our forward-looking statements prove to be inaccurate, the inaccuracy may be material. In light of the significant uncertainties in these forward-looking statements, you should not regard these statements as a representation or warranty by us or any other person that we will achieve our objectives and plans in any specified time frame, or at all. We undertake no obligation to publicly update any forward-looking statements, whether as a result of new information, future events or otherwise, except as required by law.

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SUMMARY

This summary highlights selected information contained elsewhere in this prospectus supplement. This summary does not contain all the information that you should consider before deciding to invest in our ordinary shares. You should read the entire prospectus supplement, the accompanying base prospectus and any related free writing prospectus, including the information incorporated by reference herein, carefully, including the section titled “Risk Factors” included in this prospectus supplement and the accompanying base prospectus and our consolidated financial statements and related notes incorporated by reference herein before making an investment decision. Some of the statements in this summary constitute forward-looking statements. See the section titled “Special Note Regarding Forward-Looking Statements.”

The information presented in this prospectus supplement assumes, unless otherwise indicated, that the underwriters do not exercise their over-allotment option to purchase additional ordinary shares.

The Company

Company Overview

We are a leading independent energy company focused on natural gas and liquids production, transportation, marketing and well retirement, primarily located within the Appalachian and Central regions of the United States. The Appalachian Basin spans Pennsylvania, Virginia, West Virginia, Kentucky, Tennessee and Ohio and consists of multiple productive, shallow conventional formations and two productive, deeper unconventional shale formations, the Marcellus Shale and the slightly deeper Utica Shale. We also operate in the Bossier and Haynesville shale formations and the Cotton Valley sandstones in East Texas and West Louisiana, the Barnett Shale in North Texas and the Mid-Continent producing areas across Central Texas, along with the Anadarko Basin across North Texas and Oklahoma and Permian Basin in West Texas and New Mexico.

Our strategy is to acquire existing long-life assets and to make investments in those assets to improve environmental and operational performance under a modern field management philosophy and stewardship-based approach to generate cash flows and maximize shareholder returns. Our shareholder return-focused business model is underpinned by a disciplined commodity hedging strategy that is designed to mitigate downside price risk for the three primary commodity products we produce and sell: natural gas, crude oil and NGLs. We believe the combination of acquiring and operating low decline assets and a disciplined hedging program provides our shareholders with relatively predictable, reliable and sustainable cash flows.

We actively seek to acquire high-quality producing conventional and unconventional natural gas and oil assets from industry participants divesting assets either due to a desire to reallocate capital to other assets and/or to raise cash proceeds. We target long-life producing assets at what we view as attractive valuations, and in our commercial evaluation, we typically attribute substantially all value to the proved developed producing (PDP) reserves and attribute minimal, if any, value to the proved undeveloped reserves. We typically assign no value to probable or possible reserves. Our target assets are characterized by multi-decade production profiles and low decline rates, and we place a particular focus on assets whose value we believe can be enhanced by scale and vertical integration through complementary midstream infrastructure or by our operational and marketing framework.

We focus on improving the performance and operations of assets we acquire, many of which have not received significant operational focus or investment from their former owners. This improvement is achieved through our deployment of rigorous field management programs and/or refreshing infrastructure. Through operational efficiencies, we attempt to maximize value by enhancing production while lowering costs and improving well productivity. These production enhancement techniques also enable us to reduce the methane emissions profile of our wells. We further enhance the value of our assets by leveraging our midstream gathering and transportation infrastructure, which allows us to diversify and expand our third-party revenue, optimize pricing, increase flow assurance and reduce third-party costs and inefficiencies.

Corporate Information

We were incorporated as a public limited company with the legal name Diversified Gas & Oil plc under the laws of the United Kingdom on July 31, 2014 with the company number 09156132. On May 6, 2021, we changed our company name to Diversified Energy Company PLC.

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Our registered office is located at 4th Floor Phoenix House, 1 Station Hill, Reading, Berkshire United Kingdom, RG1 1NB. In February 2017, our ordinary shares were admitted to trading on the Alternative Investment Market of the LSE under the ticker “DGOC.” In May 2020, our ordinary shares were admitted to listing on the Official List of the United Kingdom Financial Conduct Authority and to trading on the Main Market of the LSE. With the change in corporate name in 2021, our ordinary shares listed on the LSE began trading under the new ticker “DEC.” In December 2023, our ordinary shares were admitted to trading on the NYSE under the ticker “DEC.”

Our principal executive offices are located at 1600 Corporate Drive, Birmingham, Alabama 35242, and our telephone number at that location is +1 (205) 408-0909. Our website address is www.div.energy. The information contained on, or that can be accessed from, our website does not form part of this prospectus supplement. We have included our website address solely as an inactive textual reference.

Recent Developments

Pending Acquisition

On September 8, 2025, we entered into a definitive agreement (the “Merger Agreement”) to acquire Canvas for total consideration of approximately $550.0 million. Under the terms and subject to the conditions in the Merger Agreement, we will acquire Canvas through a merger of a newly formed subsidiary with and into Canvas, with Canvas surviving the merger as one of our subsidiaries. Canvas adds complementary operated producing properties and acreage positions in Oklahoma, concentrated in Major, Kingfisher, and Canadian counties composed of approximately 241,000 acres, with net production of 24 Mboepd (or 147 MMcfepd) as of July 2025 and total proved reserves of approximately 200 MMBoe as of March 21, 2025. The total consideration consists of approximately $550.0 million, subject to adjustment in accordance with the terms of the Merger Agreement. The purchase price is expected to be funded through a privately rated bilaterally structured asset-backed securitization originated by Carlyle of approximately $400.0 million, $100.0 million of the Company’s existing liquidity and the issuance of approximately 3.4 million ordinary shares. The Pending Acquisition is expected to close during the fourth quarter of 2025. Completion of the Pending Acquisition is subject to customary closing conditions. Accordingly, we can offer no assurance that we will complete the Pending Acquisition. See the risk factors included in Appendix 1 of Exhibit 99.1 in our report on Form 6-K, furnished to the SEC on September 9, 2025, which is incorporated by reference herein.

Implications of Being a Foreign Private Issuer

Until January 1, 2026, we are classified as a foreign private issuer, which exempts us from compliance with certain laws and regulations of the SEC and certain regulations of the NYSE. Consequently, we are currently not subject to all of the disclosure requirements applicable to U.S. domestic public companies. For example, we are exempt from certain rules under the Exchange Act that regulate disclosure obligations and procedural requirements related to the solicitation of proxies, consents or authorizations applicable to a security registered under the Exchange Act. In addition, our executive officers and directors are exempt from the reporting and “short-swing” profit recovery provisions of Section 16 of the Exchange Act and related rules with respect to their purchases and sales of our securities. Moreover, we are not required to file periodic reports and financial statements with the SEC as frequently or as promptly as public companies that are domestic issuers. Accordingly, there may be less publicly available information concerning the Company than there is for domestic issuers. We have taken advantage of certain of these reduced reporting and other requirements in this prospectus supplement. Accordingly, the information contained herein may be different from the information you receive from other public companies in the United States in which you may hold equity securities. We have determined that we will no longer qualify as a foreign private issuer beginning in 2026, and as a result, we will be subject to the same reporting requirements as comparable public companies that are domestic issuers.

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The Offering

Issuer

Diversified Energy Company PLC

Ordinary shares offered by the Selling Stockholders

5,713,353 ordinary shares. (6,570,355 ordinary shares if the underwriters exercise in full their 30-‎day over-allotment option to purchase additional ordinary shares from the selling stockholders).‎

Public offering price per ordinary share

$   .

Ordinary shares outstanding prior to and immediately after this offering

77,935,467 ordinary shares, as of September 12, 2025.

Indications of Interest

The EBT, which is operated through a third-party trustee, has indicated an interest to participate and purchase up to 750,000 ordinary shares being sold in the offering at a price per ordinary share equal to the public offering price, although no commitment to purchase has been made. Please see our Annual Report on Form 20-F for the year ended December 31, 2024 for additional information on the EBT.

Use of proceeds

We will not receive any proceeds from the sale of ordinary shares held by the selling stockholders. See “Use of Proceeds.”

Risk factors

Investing in our ordinary shares involves a high degree of risk. Please see the section titled “Risk Factors” in this prospectus supplement and the accompanying base prospectus and the other information included or incorporated by reference in this prospectus supplement or the accompanying base prospectus for a discussion of factors you should carefully consider before investing in our ordinary shares.

Trading symbol

Our ordinary shares are listed on the NYSE and the LSE under the symbol “DEC.”

Transfer agent

Computershare Trust Company, N.A. is the transfer agent of our ordinary shares.

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RISK FACTORS

An investment in our ordinary shares involves a high degree of risk. You should carefully consider the risks and uncertainties described below, together with all of the other information included in or incorporated by reference in this prospectus supplement and the accompanying base prospectus, including the section titled “Special Note Regarding Forward-Looking Statements” in this prospectus supplement, and the section titled “Strategic Report—Risk Factors” and our audited consolidated financial statements and related notes, in each case included in our annual report on Form 20-F for the year ended December 31, 2024, filed with the SEC on March 17, 2025, our unaudited interim consolidated financial statements and related notes included in our report on Form 6-K furnished to the SEC on August 11, 2025, and the risk factors included in Appendix 1 of Exhibit 99.1 in our report on Form 6-K, furnished to the SEC on September 9, 2025, which are each incorporated by reference herein, before deciding to invest in our ordinary shares. Additional risks not presently known to us or that we currently deem immaterial may also impair our business operations. Our business, financial condition or results of operations could be materially and adversely affected by any of the following risks or additional risks and uncertainties that are currently immaterial or unknown. The trading price and value of our ordinary shares could decline due to any of these risks, and you may lose all or part of your investment.

The price of our ordinary shares may be volatile and may fluctuate due to factors beyond our control.

The public offering price for the ordinary shares will be determined through negotiations between the underwriters and the selling stockholders, and may vary from the market price of our ordinary shares following this offering. If you purchase ordinary shares in this offering, you may not be able to resell those ordinary shares at or above the public offering price. The market price of our ordinary shares may fluctuate significantly due to a variety of factors, including:

• operating results that vary from our financial guidance or the expectations of securities analysts and investors;

• changes in natural gas, NGL or oil prices;

• the operating and securities price performance of companies that investors consider to be comparable to us;

• announcements of strategic developments, acquisitions and other material events by us or our competitors;

• failure to meet or exceed financial estimates and projections of the investment community or that we provide to the public;

• initial issuance of new or updated research or reports by securities analysts; changes in government regulations;

• financing or other corporate transactions;

• the loss of any of our key personnel;

• sales of our ordinary shares by us, our executive officers and Board members or our shareholders in the future, or the perception that such sales may occur;

• speculation in the press or investment community;

• domestic and international economic, geopolitical, and legal factors unrelated to our performance;

• price and volume fluctuations in the overall stock market, including as a result of trends in the economy as a whole; and

• other events and factors, many of which are beyond our control.

These and other market and industry factors may cause the market price and demand for our ordinary shares to fluctuate substantially, regardless of our actual operating performance, which may limit or prevent investors from readily selling their ordinary shares and may otherwise materially and adversely affect the liquidity of our ordinary shares. In the past, when the market price of a stock has been volatile, holders of that stock have sometimes instituted securities class action litigation against the issuer. If any of the holders of our ordinary shares were to bring such a lawsuit against us, we could incur substantial costs defending the lawsuit and the

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attention of our senior management would be diverted from the operation of our business. Any adverse determination in litigation could also subject us to significant liabilities.

The dual listing of our ordinary shares may adversely affect the liquidity and value of our ordinary shares.

Our ordinary shares trade on the NYSE and the Main Market of the LSE. We cannot predict the effect of the dual listing on the value of our ordinary shares, including the extent to which an active market for our ordinary shares in the United States or the United Kingdom will be sustained. However, the dual listing of our ordinary shares may dilute trading liquidity in one or both markets and may adversely affect the further development of an active trading market for our ordinary shares in the United States.

Future sales, or the possibility of future sales, of a substantial number of our ordinary shares could adversely affect the price of our ordinary shares.

Future sales of a substantial number of our ordinary shares, or the perception that such sales will occur, could cause a decline in the market price of our ordinary shares. We may, in our sole discretion, release all or any portion of the equity securities subject to the lock-up agreements prior to the expiration of the lock-up agreements. If, after the end of such lock-up agreements, these shareholders sell substantial amounts of ordinary shares in the public market, or the market perceives that such sales may occur, the market price of our ordinary shares and our ability to raise capital through an issue of equity securities in the future could be adversely affected.

There is no guarantee that we will continue to pay dividends on our ordinary shares in the future.

The decision of our board of directors to recommend and our ability to pay dividends is dependent upon our performance and financial condition, cash requirements, future prospects, commodity prices, compliance with the financial covenants and restrictions under the terms of certain of our credit facilities, profits available for distribution and other factors deemed to be relevant at the time and on the continued health of the markets in which we operate. Further, as a company listed on both the NYSE and the LSE, while our board of directors’ evaluation of our ability or need to pay dividends will primarily remain a question of the foregoing factors, it will also take into account the performance of our ordinary shares, including relative to our peer group. There can be no guarantee that we will continue to pay dividends in the future on our ordinary shares.

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USE OF PROCEEDS

We will not receive any proceeds from the sale of ordinary shares offered by the selling stockholders, including from any exercise by the underwriters of their option to purchase additional ordinary shares from the selling stockholders. The selling stockholders will receive all of the net proceeds from the sale of these ordinary shares. See the section of this prospectus supplement entitled “Selling Stockholders.”

We will not be selling any ordinary shares in this offering. Therefore, the offering will not result in any dilution of equity ownership to our existing stockholders.

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SELLING STOCKHOLDERS

The following table sets forth (i) the names of the selling stockholders, (ii) the number of ordinary shares beneficially owned by each selling stockholder as of September 12, 2025, (iii) the number of ordinary shares to be offered by each selling stockholder pursuant to this prospectus supplement and (iv) the number of ordinary shares beneficially owned by each selling stockholder assuming all ordinary shares offered by each such selling stockholder are sold in this offering. We have determined beneficial ownership in accordance with SEC rules. In computing the number of shares beneficially owned by the selling stockholders and the percentage ownership of the selling stockholders, the number of ordinary shares subject to options or warrants held by the selling stockholders that are currently exercisable or that will become exercisable within 60 days of September 12, 2025 are deemed outstanding.

The percentages reflect beneficial ownership immediately prior, and immediately after giving effect, to completion of the offering, based on 77,935,467 ordinary shares as of September 12, 2025, which includes 5,713,353 ordinary shares to be sold by the selling stockholders (6,570,355 shares assuming full exercise of the underwriters’ option).

			Ordinary Shares Beneficially Owned Prior to this Offering						Number of Ordinary Shares Offered Hereby			Number of Ordinary Shares Offered Hereby (assuming full exercise of the underwriters’ option)			Ordinary Shares Beneficially Owned After this Offering(1)						Ordinary Shares Beneficially Owned After this Offering (assuming full exercise of the underwriters’ option)(1)
			Number			%									Number			%			Number			%
Selling Stockholders:
EIG Energy Fund XVI, L.P.(2)			5,220,365			6.70%			1,498,018			1,722,719			3,722,347			4.78%			3,497,646			4.49%
FSEP Investments, Inc.(3)			3,682,450			4.72%			1,056,703			1,215,208			2,625,747			3.37%			2,467,242			3.17%
EIG Energy Fund XVI Holdings Splitter (FourPoint), L.P.(2)			2,385,694			3.06%			684,590			787,279			1,701,104			2.18%			1,598,415			2.05%
EIG Holdings Carry Splitter (Redwood), L.P.(2)			1,934,731			2.48%			555,183			638,461			1,379,548			1.77%			1,296,270			1.66%
EIG Energy Fund XV, L.P.(2)			1,418,380			1.82%			407,013			468,065			1,011,367			1.30%			950,315			1.22%
FSIC Investments, Inc.(4)			1,171,685			1.50%			336,223			386,656			835,462			1.07%			785,029			1.01%
EIG Energy Fund XV Blocker Series C (Fourpoint), LLC(2)			1,152,795			1.48%			330,802			380,422			821,993			1.05%			772,373			*%
EIG Energy Fund XV-A, L.P.(2)			968,093			1.24%			277,800			319,470			690,293			*%			648,623			*%
FSIC II Investments, Inc.(5)			725,328			*%			208,137			239,358			517,191			*%			485,970			*%
EIG Redwood Co-Investment, L.P.(2)			624,708			*%			179,263			206,153			445,445			*%			418,555			*%
EIG Energy XV Blocker Agent (Redwood), Inc.(2)			541,997			*%			155,530			178,859			386,467			*%			363,138			*%
EIG Energy Fund XVI-E, L.P.(2)			83,955			*%			24,091			27,705			59,864			*%			56,250			*%

*
Less than 1%.

(1)
The ordinary shares are held by GTU Ops in its capacity as nominee for Computershare Trust Company N.A. (the “Depositary”), as the depositary and issuer of depositary receipts, acting under the terms of a DR agreement dated December 11, 2023. The Depositary has issued depositary receipts in certificated form in respect of the underlying entitlement to ordinary shares on a one for one basis to the selling stockholders.

(2)
EIG Redwood Co-Investment GP, LLC (“EIG Redwood Co-Investment GP”) is the general partner of EIG Redwood Co-Investment, L.P. (“Redwood Co-Investment”). EIG Energy Fund XV GP, LLC (“EIG Fund XV GP”) is the general partner of EIG Energy Fund XV, L.P. (“Fund XV”) and EIG Energy Fund XV-A, L.P. (“Fund XV-A”). EIG Energy Fund XVI GP, LLC (“EIG Fund XVI GP,” and together with EIG Redwood Co-Investment GP and EIG Fund XV GP, the “General Partners”) is the general partner of EIG Holdings Carry Splitter (Redwood), L.P. (“Carry Splitter (Redwood)”), EIG Energy Fund XVI, L.P. (“Fund XVI”), EIG Energy Fund XVI-E, L.P. (“Fund XVI-E”), and EIG Energy Fund XVI Holdings Splitter (Fourpoint), L.P. (“Fund XVI Holdings Splitter (Fourpoint)”).

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EIG Energy Fund XV Blocker Series C (Fourpoint), LLC (“Fund XV Blocker Series C (Fourpoint)”) is managed directly by EIG Management Company, LLC. Jean Powers is the sole director and officer of EIG Energy XV Blocker Agent (Redwood) Inc. (“Fund XV Blocker Agent (Redwood),” and together with Redwood Co-Investment, Fund XV, Fund XV-A, Carry Splitter (Redwood), Fund XVI, Fund XVI-E, Fund XVI Holdings Splitter (Fourpoint), and Fund XV Blocker Series C (Fourpoint), the “EIG Fund Entities”). To the extent applicable, the General Partners have constituted investment committees that are, directly or indirectly, responsible for making investment decisions for the EIG Fund Entities. The members of the relevant investment committees are R. Blair Thomas and Randall S. Wade. Mr. Wade also sits on the board of directors of the Company. The business address of the EIG Fund Entities is 600 New Hampshire Ave NW, Suite 1200, Washington, DC 20037.

(3)
The ordinary shares are directly beneficially owned by FSEP Investments, Inc., a wholly-owned subsidiary of FS Specialty Lending Fund. FS/EIG Advisor, LLC is the investment adviser to FS Specialty Lending Fund. FS Investment Advisor, LLC is a member of FS/EIG Advisor, LLC and is responsible for appointing the investment committee members responsible for making investment decisions with respect to the ordinary shares. The address for the FS entities is 201 Rouse Boulevard, Philadelphia, PA 19112.

(4)
The ordinary shares are directly beneficially owned by FSIC Investments, Inc., a wholly-owned subsidiary of FS KKR Capital Corp. (“FSK”). FS/KKR Advisor, LLC (“FS/KKR Advisor”) is the investment adviser to FSK. FSJV Holdco, LLC and KKR Credit Advisors (US) LLC are members of FS/KKR Advisor and are responsible for appointing the investment committee members responsible for making investment decisions with respect to the ordinary shares. The address for the FS entities is 201 Rouse Boulevard, Philadelphia, PA 19112.

(5)
The ordinary shares are directly beneficially owned by FSIC II Investments, Inc., a wholly-owned subsidiary of FSK. FS/KKR Advisor is the investment adviser to FSK. FSJV Holdco, LLC and KKR Credit Advisors (US) LLC are members of FS/KKR Advisor and are responsible for appointing the investment committee members responsible for making investment decisions with respect to the ordinary shares. The address for the FS entities is 201 Rouse Boulevard, Philadelphia, PA 19112.

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MATERIAL TAX CONSEQUENCES

The following summary contains a description of certain United Kingdom and U.S. federal income tax consequences of the ownership and disposition of ordinary shares, but it does not purport to be a comprehensive description of all the tax consequences that may be relevant to a decision to purchase ordinary shares. The summary is based upon the tax laws of the United Kingdom and regulations thereunder and on the tax laws of the United States and regulations thereunder as of the date hereof, which are subject to change.

Material United Kingdom Tax Consequences

The following statements are of a general nature and do not purport to be a complete analysis of all potential U.K. tax consequences of acquiring, holding and disposing of the ordinary shares. They are based on current U.K. tax law and on the current published practice of His Majesty’s Revenue and Customs (“HMRC”) (which may not be binding on HMRC), as of the date of this prospectus supplement, all of which are subject to change, possibly with retrospective effect. They are intended to address only certain U.K. tax consequences for holders of ordinary shares who are tax resident in (and only in) the United Kingdom, and in the case of individuals, domiciled in (and only in) the United Kingdom (except where expressly stated otherwise) who are the absolute beneficial owners of the ordinary shares and any dividends paid on them and who hold the ordinary shares as investments (other than in an individual savings account or a self-invested personal pension), and who currently hold their ordinary shares within the system of DTC. They do not address the U.K. tax consequences which may be relevant to certain classes of shareholders such as traders, brokers, dealers, banks, financial institutions, insurance companies, investment companies, collective investment schemes, tax-exempt organizations, trustees, persons connected with the Company, persons holding their ordinary shares as part of hedging or conversion transactions, shareholders who have (or are deemed to have) acquired their ordinary shares by virtue of an office or employment, and shareholders who are or have been officers or employees of the Company. The statements do not apply to any shareholder who either directly or indirectly holds or controls 10% or more of the Company’s share capital (or class thereof), voting power or profits.

The following is intended only as a general guide and is not intended to be, nor should it be considered to be, legal or tax advice to any particular prospective subscriber for, or purchaser of, any ordinary shares. Accordingly, prospective subscribers for, or purchasers of, any ordinary shares who are in any doubt as to their tax position regarding the ownership or disposition of any ordinary shares or who are subject to tax in a jurisdiction other than the United Kingdom should consult their own tax advisers.

U.K. taxation of dividends

Withholding tax

The Company will not be required to withhold U.K. tax at source when paying dividends. The amount of any liability to U.K. tax on dividends paid by the Company will depend on the individual circumstances of a shareholder.

Individual shareholders

An individual shareholder who is resident for tax purposes in the United Kingdom may, depending on his or her particular circumstances, be subject to U.K. tax on dividends received from the Company. An individual shareholder who is not resident for tax purposes in the United Kingdom should not be chargeable to U.K. income tax on dividends received from the Company unless he or she carries on (whether solely or in partnership) any trade, profession or vocation in the United Kingdom through a branch or agency to which the ordinary shares are attributable. There are certain exceptions for trading in the United Kingdom through independent agents, such as some brokers and investment managers.

All dividends received by a U.K. tax resident individual holder of any ordinary shares from the Company or from other sources will form part of the shareholder’s total income for income tax purposes and will constitute the top slice of that income. A nil rate of income tax will apply to the first £500 (for tax year 2025/2026) of taxable dividend income received by the shareholder in a tax year (the “dividend allowance”). Income within the dividend allowance will be taken into account in determining whether income in excess of the dividend allowance falls within the basic rate, higher rate or additional rate tax bands. Dividend income in excess of the dividend allowance will be taxed at 8.75% to the extent that the excess amount falls within the basic rate tax band, 33.75% to the extent that the excess amount falls within the higher rate tax band and 39.35% to the extent that the excess amount falls within the additional rate tax band.

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Corporate shareholders

Corporate shareholders which are resident for tax purposes in the United Kingdom should not be subject to U.K. corporation tax on any dividend received from the Company so long as the dividends qualify for exemption (as is likely) and certain conditions are met (including anti-avoidance conditions). If the conditions for exemption are not met or cease to be satisfied, or such a shareholder elects for an otherwise exempt dividend to be taxable, the shareholder will be subject to U.K. corporation tax on dividends received from the Company, at the rate of corporation tax applicable to that shareholder (the main rate of U.K. corporation tax is currently 25% for financial year 2025/2026).

Corporate shareholders who are not resident in the United Kingdom will not generally be subject to U.K. corporation tax on dividends unless they are carrying on a trade, profession or vocation in the United Kingdom through a permanent establishment in connection with which the ordinary shares are used, held, or acquired.

A shareholder who is resident outside the United Kingdom may be subject to non-U.K. taxation on dividend income under local law.

U.K. taxation of capital gains

U.K. resident shareholders

A disposal or deemed disposal of ordinary shares by an individual or corporate shareholder who is tax resident in the United Kingdom may, depending on the shareholder’s circumstances and subject to any available exemptions or reliefs, give rise to a chargeable gain or allowable loss for the purposes of U.K. taxation of chargeable gains.

Any chargeable gain (or allowable loss) will generally be calculated by reference to the consideration received for the disposal of the ordinary shares less the allowable cost to the shareholder of acquiring any such ordinary shares.

The applicable tax rates for individual shareholders realizing a gain on the disposal of ordinary shares is, broadly, 18% for basic rate taxpayers and 24% for higher and additional rate taxpayers. For corporate shareholders, corporation tax is generally charged on chargeable gains at the rate applicable to the relevant corporate shareholder (the main rate of U.K. corporation tax is currently 25% for financial year 2025/2026).

Non-U.K. shareholders

Shareholders who are not resident in the United Kingdom and, in the case of an individual shareholder, not temporarily non-resident, should not be liable for U.K. tax on capital gains realized on a sale or other disposal of ordinary shares unless (i) such ordinary shares are used, held or acquired for the purposes of a trade, profession or vocation carried on in the United Kingdom through a branch or agency or, in the case of a corporate shareholder, through a permanent establishment, or (ii) where certain conditions are met, the Company derives 75% or more of its gross value from U.K. land. Shareholders who are not resident in the United Kingdom may be subject to non-U.K. taxation on any gain under local law.

Generally, an individual shareholder who has ceased to be resident in the United Kingdom for U.K. tax purposes for a period of five years or less and who disposes of any ordinary shares during that period may be liable on their return to the United Kingdom to U.K. taxation on any capital gain realized (subject to any available exemption or relief).

U.K. stamp duty (“stamp duty”) and U.K. stamp duty reserve tax (“SDRT”)

The statements in this paragraph are intended as a general guide to the current position relating to stamp duty and SDRT and apply to any shareholder irrespective of their place of tax residence. Certain categories of person, including intermediaries, brokers, dealers and persons connected with depositary receipt arrangements and clearance services, may not be liable to stamp duty or SDRT or may be liable at a higher rate or may, although not primarily liable for the tax, be required to notify and account for it under the U.K. Stamp Duty Reserve Tax Regulations 1986.

The following statements apply only to ordinary shares that are registered on the main share register in the United Kingdom. For the avoidance of doubt, the position in relation to ordinary shares that are registered on

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any overseas branch share register or held through a depositary system or clearance service is not considered other than to the extent expressly set out below. Prospective investors who are in any doubt about their tax position are strongly recommended to consult their own professional advisers.

Issue of shares

As a general rule (and except in relation to depositary receipt systems and clearance services (as to which see below)), no U.K. stamp duty or SDRT is payable on the issue of the ordinary shares.

Clearance systems and depositary receipt issuers

Transfers of our ordinary shares to, or to a nominee or agent for, a person whose business is or includes issuing depositary receipts or to, or to a nominee or agent for, a person whose business is or includes the provision of clearance services, will generally be subject to stamp duty or SDRT at 1.5% of the amount or value of the consideration or, in certain circumstances, the value of the ordinary shares transferred unless, in the context of a clearance service, the clearance service has made and maintained an election under section 97A of the U.K. Finance Act 1986, or a “section 97A election.” It is understood that HMRC regards the facilities of DTC as a clearance service for these purposes and we are not aware of any section 97A election having been made by DTC. In practice, any liability for stamp duty or SDRT is in general borne by such person depositing the relevant shares in the depositary receipt system or clearance service. U.K. stamp duty and SDRT will not, however, arise on a transfer of our ordinary shares to a depositary receipt issuer or to a clearance service to the extent that such transfer is an “exempt capital-raising transfer” or an “exempt listing transfer,” as defined in Finance Act 2024.

The Company has received HMRC clearance confirming that agreements to transfer depositary interests which represent ordinary shares held within the DTC clearance system will not be subject to SDRT.

Transfer of shares

No SDRT should be required to be paid on a paperless transfer of ordinary shares through the clearance service facilities of DTC, provided that no section 97A election has been made by DTC, and such ordinary shares are held through DTC at the time of any agreement for their transfer.

No U.K. stamp duty will in practice be payable on a written instrument transferring an ordinary share provided that the instrument of transfer is executed and remains at all times outside the United Kingdom. Where these conditions are not met, the transfer of, or agreement to transfer, an ordinary share could, depending on the circumstances, attract a charge to U.K. stamp duty at the rate of 0.5% of the amount or value of the consideration. If it is necessary to pay stamp duty, it may also be necessary to pay interest and penalties.

Material United States Federal Income Tax Consequences

The following discussion is a summary of the material U.S. federal income tax consequences to U.S. Holders and Non-U.S. Holders (each, as defined below) of the purchase, ownership and disposition of an ordinary share issued pursuant to this offering, but does not purport to be a complete analysis of all potential U.S. federal tax consequences. The consequences of other U.S. federal tax laws, such as estate and gift tax laws, and any applicable state, local, or non-U.S. tax laws are not discussed herein. This discussion is based on the U.S. Internal Revenue Code of 1986, as amended (the “Code”), Treasury Regulations promulgated thereunder, judicial decisions and administrative interpretations of the U.S. Internal Revenue Service (the “IRS”), in each case in effect as of the date hereof. These authorities may change or be subject to differing interpretations. Any such change or differing interpretation may be applied retroactively in a manner that could adversely affect a holder of an ordinary share. We have not sought and will not seek any rulings from the IRS regarding the matters discussed below. There can be no assurance that the IRS or a court will not take a contrary position to the description below of the tax consequences of the purchase, ownership and disposition of our ordinary shares.

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This discussion is limited to U.S. Holders and Non-U.S. Holders that each hold an ordinary share as a “capital asset” within the meaning of Section 1221 of the Code (generally, property held for investment). This discussion does not address all U.S. federal income tax consequences relevant to a holder’s particular circumstances, including the impact of the Medicare contribution tax on net investment income and the alternative minimum tax. In addition, it does not address consequences relevant to holders subject to special rules, including, without limitation:

• U.S. expatriates and former citizens or long-term residents of the United States;

• U.S. Holders whose functional currency is not the U.S. dollar;

• persons holding an ordinary share as part of a hedge, straddle or other risk reduction strategy or as part of a conversion transaction or other integrated investment;

• banks, insurance companies, regulated investment companies, mutual funds and other financial institutions;

• brokers, dealers or traders in securities;

• “controlled foreign corporations,” “passive foreign investment companies,” and corporations that accumulate earnings to avoid U.S. federal income tax;

• partnerships or other entities or arrangements treated as partnerships for U.S. federal income tax purposes and other pass-through entities (and investors therein);

• tax-exempt organizations or governmental organizations;

• persons deemed to sell an ordinary share under the constructive sale provisions of the Code;

• persons who hold or receive an ordinary share pursuant to the exercise of any employee stock option or otherwise as compensation;

• tax-qualified retirement plans;

• “qualified foreign pension funds” as defined in Section 897(l)(2) of the Code and entities of all the interests of which are held by qualified foreign pension funds; and

• Non-U.S. Holders who will own directly, indirectly or constructively more than 5% of our ordinary shares.

If an entity or arrangement treated as a partnership for U.S. federal income tax purposes holds an ordinary share, the tax treatment of a partner in the partnership will depend on the status of the partner, the activities of the partnership and certain determinations made at the partner level. Accordingly, partnerships holding an ordinary share and the partners in such partnerships should consult their tax advisors regarding the U.S. federal income tax consequences to them.

THIS DISCUSSION IS FOR INFORMATIONAL PURPOSES ONLY AND IS NOT TAX ADVICE. PROSPECTIVE INVESTORS SHOULD CONSULT THEIR TAX ADVISORS WITH RESPECT TO THE APPLICATION OF THE U.S. FEDERAL INCOME TAX LAWS TO THEIR PARTICULAR SITUATIONS AS WELL AS ANY TAX CONSEQUENCES OF THE PURCHASE, OWNERSHIP AND DISPOSITION OF AN ORDINARY SHARE ARISING UNDER THE U.S. FEDERAL ESTATE OR GIFT TAX LAWS OR UNDER THE LAWS OF ANY STATE, LOCAL OR NON-U.S. TAXING JURISDICTION OR UNDER ANY APPLICABLE INCOME TAX TREATY.

U.S. Tax Status of Diversified Energy

Pursuant to Section 7874 of the Code, we believe we are and will continue to be treated as a U.S. corporation for all purposes under the Code. As such, the Company is subject to U.S. federal income tax on its worldwide taxable income (regardless of whether such income is “U.S. source” or “foreign source”) and is required to file a U.S. federal income tax return annually with the IRS. The Company is also subject to income tax in the United Kingdom. It is unclear how the foreign tax credit rules under the Code will operate in certain circumstances, given the treatment of the Company as a U.S. corporation for U.S. federal income tax purposes and the taxation of the Company in the United Kingdom. Accordingly, it is possible that the Company will be subject to double taxation with respect to all or part of its taxable income.

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Since we will be treated as a U.S. corporation for all purposes under the Code, we will not be treated as a “passive foreign investment company,” as such rules apply only to non-U.S. corporations for U.S. federal income tax purposes.

U.S. Holders

For purposes of this discussion, a “U.S. Holder” is any beneficial owner of an ordinary share that, for U.S. federal income tax purposes, is or is treated as any of the following:

• an individual who is a citizen or resident of the United States;

• a corporation (or other entity treated as a corporation for U.S. federal income tax purposes) created or organized under the laws of the United States, any state thereof, or the District of Columbia;

• an estate, the income of which is subject to U.S. federal income tax regardless of its source; or

• a trust that (1) is subject to the primary supervision of a U.S. court and the control of one or more “United States persons” (within the meaning of Section 7701(a)(30) of the Code), or (2) has a valid election in effect to be treated as a United States person for U.S. federal income tax purposes.

Distributions

Distributions, if any, made on the ordinary shares, generally will be included in a U.S. Holder’s income as ordinary dividend income to the extent of the Company’s current or accumulated earnings and profits. Distributions in excess of the Company’s current and accumulated earnings and profits will be treated as a tax-free return of capital to the extent of a U.S. Holder’s tax basis in the ordinary shares and thereafter as capital gain from the sale or exchange of such ordinary shares. Dividends received by a corporate U.S. Holder may be eligible for a dividends-received deduction, subject to applicable limitations. Dividends received by certain non-corporate U.S. Holders (including individuals) are generally taxed at the lower applicable long-term capital gains rates, provided certain holding period and other requirements are satisfied.

Sales, Certain Redemptions or Other Taxable Dispositions of Ordinary Shares

Upon the sale, certain redemptions or other taxable dispositions of an ordinary share, a U.S. Holder generally will recognize gain or loss equal to the difference between the amount realized and the U.S. Holder’s tax basis in the ordinary shares. Any gain or loss recognized on a taxable disposition of an ordinary share will be capital gain or loss. Such capital gain or loss will be long-term capital gain or loss if a U.S. Holder’s holding period at the time of the sale, redemption or other taxable disposition of the ordinary shares is longer than one year. Long-term capital gains recognized by certain non-corporate U.S. Holders (including individuals) are generally subject to a reduced rate of U.S. federal income tax. The deductibility of capital losses is subject to limitations.

Foreign Tax Credit Limitations

As discussed above under “Material United Kingdom Tax Consequences,” a U.S. Holder may be subject to U.K. tax with respect to its ordinary shares in certain circumstances (e.g., if (i) such ordinary shares are used, held or acquired for the purposes of a trade, profession or vocation carried on in the United Kingdom through a branch or agency or, in the case of a corporate shareholder, through a permanent establishment, or (ii) where certain conditions are met, the Company derives 75% or more of its gross value from U.K. land). For U.S. federal income tax purposes, a U.S. Holder may elect for any taxable year to receive either a credit or a deduction for all foreign income taxes paid by the holder during the year. Complex limitations apply to the foreign tax credit, including a general limitation that the credit cannot exceed the proportionate share of a taxpayer’s U.S. federal income tax that the taxpayer’s foreign source taxable income bears to the taxpayer’s worldwide taxable income. In applying this limitation, items of income and deduction must be classified, under complex rules, as either U.S. source or foreign source. The status of the Company as a U.S. corporation for U.S. federal income tax purposes will cause dividends paid by the Company to be treated as U.S. source rather than foreign source income for this purpose. As a result, by virtue of the U.S. source character of a dividend paid by the Company and the foreign tax credit limitation, a foreign tax credit may be unavailable for any U.K. tax paid on distributions received from the Company. Similarly, to the extent a sale, redemption or other disposition of our ordinary shares by a U.S. Holder results in U.K. tax payable by the U.S. Holder, a foreign tax credit may

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be unavailable to the U.S. Holder for such U.K. tax. In each case, however, the U.S. Holder should be able to take a deduction for the U.S. Holder’s U.K. tax paid, provided that the U.S. Holder has not elected to credit other foreign taxes during the same taxable year. The foreign tax credit rules are complex, and their application in connection with Section 7874 of the Code in the presence of the United States-United Kingdom income tax treaty is not entirely clear. Each U.S. Holder should consult its tax advisor regarding these rules.

Foreign Currency

The amount of any distributions paid to a U.S. Holder in foreign currency, or the amount of proceeds paid in foreign currency on the sale, redemption or other disposition of our ordinary shares, generally will be equal to the U.S. dollar value of such foreign currency based on the exchange rate applicable on the date of receipt (regardless of whether such foreign currency is converted into U.S. dollars at that time). A U.S. Holder will have a basis in the foreign currency equal to its U.S. dollar value on the date of receipt. Any U.S. Holder that converts or otherwise disposes of the foreign currency after the date of receipt may have a foreign currency exchange gain or loss that would be treated as ordinary income or loss, and generally will be U.S. source income or loss for foreign tax credit purposes. Different rules apply to U.S. Holders that use the accrual method of tax accounting. A U.S. Holder that recognizes foreign currency exchange loss with respect to our ordinary shares would be required to report the loss on IRS Form 8886 (Reportable Transaction Disclosure Statement) if the loss exceeds the thresholds set forth in the applicable Treasury Regulations. For individuals and trusts, this loss threshold is $50,000 in any single year. For other types of taxpayers, the thresholds are higher. U.S. Holders should consult their tax advisors regarding the rules concerning foreign currency exchange gain or loss.

Non-U.S. Holders

For purposes of this discussion, a “Non-U.S. Holder” is any beneficial owner of an ordinary share that is neither a U.S. Holder nor an entity or arrangement treated as a partnership for U.S. federal income tax purposes.

Distributions

If the Company makes distributions of cash or property on the ordinary shares, such distributions will constitute dividends for U.S. federal income tax purposes to the extent paid from the Company’s current or accumulated earnings and profits, as determined under U.S. federal income tax principles. Amounts not treated as dividends for U.S. federal income tax purposes will constitute a return of capital and will first be applied against and reduce a Non-U.S. Holder’s adjusted tax basis in its ordinary shares, but not below zero. Generally, a distribution that constitutes a return of capital will be subject to U.S. federal withholding tax at a rate of 15% if the Non-U.S. Holders’ ordinary shares constitute a USRPI (as defined below). However, a U.S. withholding rate of up to 30% of the entire amount of the distribution may apply, even if the Non-U.S. Holders’ ordinary shares do not constitute a USRPI. For additional information regarding when a Non-U.S. Holder may treat its ownership of the ordinary shares as not constituting a USRPI, see below under the subsection titled “—Sale or Other Taxable Disposition.” However, because a Non-U.S. Holder would not have any U.S. federal income tax liability with respect to a return of capital distribution, a Non-U.S. Holder would be entitled to request a refund of any U.S. federal income tax that is withheld from a return of capital distribution (generally by timely filing a U.S. federal income tax return for the taxable year in which the tax was withheld). Any excess will be treated as capital gain and will be treated as described below under the subsection titled “—Sale or Other Taxable Disposition.”

Subject to the discussion below on effectively connected income, dividends paid to a Non-U.S. Holder of an ordinary share will be subject to U.S. federal withholding tax at a rate of 30% of the gross amount of the dividends (or such lower rate specified by an applicable income tax treaty, provided the Non-U.S. Holder furnishes a valid IRS Form W-8BEN or W-8BEN-E (or other applicable documentation) certifying qualification for a lower treaty rate). A Non-U.S. Holder that does not timely furnish the required documentation, but that qualifies for a reduced treaty rate, may obtain a refund of any excess amounts withheld by timely filing an appropriate claim for refund with the IRS. Non-U.S. Holders should consult their tax advisors regarding their entitlement to benefits under any applicable income tax treaty.

If dividends paid to a Non-U.S. Holder are effectively connected with the Non-U.S. Holder’s conduct of a trade or business within the United States (and, if required by an applicable income tax treaty, the Non-U.S. Holder maintains a permanent establishment in the United States to which such dividends are

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attributable), the Non-U.S. Holder will be exempt from the U.S. federal withholding tax described above. To claim the exemption, the Non-U.S. Holder must furnish to the applicable withholding agent a valid IRS Form W-8ECI, certifying that the dividends are effectively connected with the Non-U.S. Holder’s conduct of a trade or business within the United States.

Any such effectively connected dividends will be subject to U.S. federal income tax on a net income basis at the regular rates. A Non-U.S. Holder that is a corporation also may be subject to a branch profits tax at a rate of 30% (or such lower rate specified by an applicable income tax treaty) on such effectively connected dividends, as adjusted for certain items. Non-U.S. Holders should consult their tax advisors regarding any applicable tax treaties that may provide for different rules.

Sale or Other Taxable Disposition

Subject to the discussion below on information reporting, backup withholding and FATCA (as defined below), a Non-U.S. Holder will not be subject to U.S. federal income tax on any gain realized upon the sale or other taxable disposition of an ordinary share unless:

• the gain is effectively connected with the Non-U.S. Holder’s conduct of a trade or business within the United States (and, if required by an applicable income tax treaty, the Non-U.S. Holder maintains a permanent establishment in the United States to which such gain is attributable);

• the Non-U.S. Holder is a nonresident alien individual present in the United States for 183 days or more during the taxable year of the disposition and certain other requirements are met; or

• our ordinary shares constitute a United States real property interest (“USRPI”) because we are (or have been during the shorter of the five-year period ending on the date of the disposition or the Non-U.S. Holder’s holding period) a U.S. real property holding corporation (“USRPHC”) for U.S. federal income tax purposes.

Gain described in the first bullet point above generally will be subject to U.S. federal income tax on a net income basis at the regular rates. A Non-U.S. Holder that is a corporation also may be subject to a branch profits tax at a rate of 30% (or such lower rate specified by an applicable income tax treaty) on such effectively connected gain, as adjusted for certain items.

A Non-U.S. Holder described in the second bullet point above will be subject to U.S. federal income tax at a rate of 30% (or such lower rate specified by an applicable income tax treaty) on gain realized upon the sale or other taxable disposition of our ordinary shares, which may be offset by U.S. source capital losses of the Non-U.S. Holder (even though the individual is not considered a resident of the United States), provided the Non-U.S. Holder has timely filed U.S. federal income tax returns with respect to such losses.

With respect to the third bullet point above, due to the nature of our assets and operations, the Company believes it is (and will continue to be) a USRPHC under the Code and the ordinary shares constitute (and will continue to constitute) a USRPI. Non-U.S. Holders generally are subject to a 15% withholding tax on the amount realized from a sale or other taxable disposition of a USRPI, such as the ordinary shares, which is required to be collected from any sale or disposition proceeds. Furthermore, such Non-U.S. Holders are subject to U.S. federal income tax (at the regular rates) in respect of any gain on their sale or disposition of the ordinary shares and are required to file a U.S. tax return to report such gain and pay any tax liability that is not satisfied by withholding. Any gain should be determined in U.S. dollars, based on the excess, if any, of the U.S. dollar value of the consideration received over the Non-U.S. Holder’s tax basis in the ordinary shares determined in U.S. dollars under the rules applicable to Non-U.S. Holders. A Non-U.S. Holder may, by filing a U.S. tax return, be able to claim a refund for any withholding tax deducted in excess of the tax liability on any gain. However, if the ordinary shares are considered “regularly traded on an established securities market” (within the meaning of the Treasury Regulations), then Non-U.S. Holders will not be subject to the 15% withholding tax on the disposition of their ordinary shares, even if such ordinary shares constitute USRPIs. Moreover, if the ordinary shares are considered “regularly traded on an established securities market” (within the meaning of the Treasury Regulations) and the Non-U.S. Holder actually or constructively owns or owned, at all times during the shorter of the five-year period ending on the date of the disposition or the Non-U.S. Holder’s holding period, 5% or less of the ordinary shares taking into account applicable constructive ownership rules, such Non-U.S. Holder may treat its ownership of the ordinary shares as not constituting a USRPI and will not be subject to U.S. federal income tax on any gain realized upon the sale or other taxable disposition of the ordinary shares or U.S. tax

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return filing requirements. The Company expects the ordinary shares to be treated as “regularly traded on an established securities market” (within the meaning of the Treasury Regulations) so long as the ordinary shares are listed on the NYSE and regularly quoted by brokers or dealers making a market in such ordinary shares.

Non-U.S. Holders should consult their tax advisors regarding tax consequences of our treatment as a USRPHC and regarding potentially applicable income tax treaties that may provide for different rules.

Information Reporting and Backup Withholding

U.S. Holders

Information reporting requirements generally will apply to payments of distributions on the ordinary shares and the proceeds of a sale of an ordinary share paid to a U.S. Holder unless the U.S. Holder is an exempt recipient and, if requested, certifies as to that status. Backup withholding generally will apply to those payments if the U.S. Holder fails to provide an appropriate certification with its correct taxpayer identification number or certification of exempt status. Any amounts withheld under the backup withholding rules will be allowed as a refund or credit against a U.S. Holder’s U.S. federal income tax liability, provided the required information is timely furnished to the IRS.

Non-U.S. Holders

Payments of dividends on the ordinary shares will not be subject to backup withholding, provided the applicable withholding agent does not have actual knowledge or reason to know the Non-U.S. Holder is a United States person and the Non-U.S. Holder either certifies its non-U.S. status, such as by furnishing a valid IRS Form W-8BEN, W-8BEN-E or W-8ECI, or otherwise establishes an exemption. However, information returns are required to be filed with the IRS in connection with any distributions on our ordinary shares paid to the Non-U.S. Holder, regardless of whether such distributions constitute dividends or whether any tax was actually withheld. In addition, proceeds of the sale or other taxable disposition of our ordinary shares within the United States or conducted through certain U.S.-related brokers generally will not be subject to backup withholding or information reporting if the applicable withholding agent receives the certification described above and does not have actual knowledge or reason to know that such holder is a United States person or the holder otherwise establishes an exemption. Proceeds of a disposition of our ordinary shares conducted through a non-U.S. office of a non-U.S. broker generally will not be subject to backup withholding or information reporting.

Copies of information returns that are filed with the IRS may also be made available under the provisions of an applicable treaty or agreement to the tax authorities of the country in which the Non-U.S. Holder resides or is established.

Backup withholding is not an additional tax. Any amounts withheld under the backup withholding rules may be allowed as a refund or a credit against a Non-U.S. Holder’s U.S. federal income tax liability, provided the required information is timely furnished to the IRS.

Additional Withholding Tax on Payments Made to Foreign Accounts

Withholding taxes may be imposed under Sections 1471 to 1474 of the Code (such Sections commonly referred to as the Foreign Account Tax Compliance Act, or “FATCA”) on certain types of payments made to non-U.S. financial institutions and certain other non-U.S. entities. Specifically, a 30% withholding tax may be imposed on dividends on, or (subject to the proposed Treasury Regulations discussed below) gross proceeds from the sale or other disposition of, our ordinary shares paid to a “foreign financial institution” or a “non-financial foreign entity” (each as defined in the Code), unless (1) the foreign financial institution undertakes certain diligence and reporting obligations, (2) the non-financial foreign entity either certifies it does not have any “substantial United States owners” (as defined in the Code) or furnishes identifying information regarding each substantial United States owner, or (3) the foreign financial institution or non-financial foreign entity otherwise qualifies for an exemption from these rules. If the payee is a foreign financial institution and is subject to the diligence and reporting requirements in (1) above, it must enter into an agreement with the U.S. Department of the Treasury requiring, among other things, that it undertake to identify accounts held by certain “specified United States persons” or “United States owned foreign entities” (each as defined in the Code), annually report certain information about such accounts and withhold 30% on certain payments to non-compliant foreign financial institutions and certain other account holders. Foreign financial institutions located in jurisdictions that have an intergovernmental agreement with the United States governing FATCA may be subject to different rules.

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Under the applicable Treasury Regulations and administrative guidance, withholding under FATCA generally applies to payments of dividends on our ordinary shares. While withholding under FATCA would have applied also to payments of gross proceeds from the sale or other disposition of stock, including our ordinary shares, proposed Treasury Regulations eliminate FATCA withholding on payments of gross proceeds entirely. Taxpayers generally may rely on these proposed Treasury Regulations until final Treasury Regulations are issued.

Prospective investors should consult their tax advisors regarding the potential application of withholding under FATCA to their investment in our ordinary shares.

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UNDERWRITING

Mizuho Securities USA LLC and Raymond James & Associates, Inc. are acting as joint book-running managers for the offering and as representatives of the underwriters named below. Subject to the terms and conditions stated in the underwriting agreement dated the date of this prospectus supplement, each underwriter named below has severally agreed to purchase, and the selling stockholders have agreed to sell to that underwriter, the number of ordinary shares set forth opposite each underwriter’s name.

Underwriters			Number of Ordinary Shares
Mizuho Securities USA LLC
Raymond James & Associates, Inc.
Citigroup Global Markets, Inc.
Total

The underwriting agreement provides that the obligations of the underwriters to purchase the ordinary shares included in this offering are subject to approval of legal matters by counsel and to other conditions. The underwriters are obligated to purchase all the ordinary shares (other than those covered by the option to purchase additional ordinary shares (the “over-allotment option”) described below) if they purchase any of the ordinary shares.

Ordinary shares sold by the underwriters to the public will initially be offered at the public offering prices set forth on the cover of this prospectus supplement. Any ordinary shares sold by the underwriters to securities dealers may be sold at a discount from the public offering price not to exceed $    per ordinary share. If all of the ordinary shares are not sold at the offering prices, the representatives may change the public offering prices and the other selling terms. The representatives have advised the selling stockholders that the underwriters do not intend to make sales to discretionary accounts.

If the underwriters sell more ordinary shares than the total number set forth in the table above, the selling stockholders have granted to the underwriters an option, exercisable for 30 days from the date of this prospectus supplement, to purchase up to an additional 857,002 ordinary shares at the public offering price less the underwriting discount. To the extent the option is exercised, each underwriter must purchase a number of additional ordinary shares approximately proportionate to that underwriter’s initial purchase commitment. Any ordinary shares issued or sold under the option will be issued and sold on the same terms and conditions as the other ordinary shares that are the subject of this offering.

The selling stockholders and we have agreed that, for a period of 60 days, and our directors and certain of our officers have agreed that, for a period of 30 days, from the date of this prospectus supplement and subject to certain exceptions (including the issuance of ordinary shares in connection with the closing of the Pending Acquisition), not to offer, sell, contract to sell, pledge, hedge, grant any option to purchase or otherwise dispose of any of our ordinary shares or any securities convertible into or exchangeable for our ordinary shares, without the prior written consent of Mizuho Securities USA LLC and Raymond James & Associates, Inc.

Our ordinary shares trade on the NYSE under the symbol “DEC” and are also admitted to listing on the Official List of the United Kingdom Financial Conduct Authority and are admitted to trading LSE, under the symbol “DEC.”

The following table shows the underwriting discounts and commissions that the selling stockholders would pay to the underwriters in connection with this offering. These amounts are shown assuming both no exercise and full exercise of the over-allotment option by the underwriters.

			Paid by the Selling Stockholders
			No Exercise			Full Exercise
Per ordinary share			$			$
Total			$			$

Pursuant to the Registration Rights Agreement, dated as of March 14, 2025, by and among the Company, the selling stockholders, and solely for purposes of Section 2.8 therein, Diversified Gas & Oil Corporation (“DGOC”), DGOC agreed to pay certain expenses relating to the registration and offering of these shares, and

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each selling stockholder agreed to pay its pro rata share of underwriting fees, discounts and commissions, placement fees of underwriters, broker commissions, transfer taxes and certain attorney’s fees not covered by DGOC. We estimate that our out-of-pocket expenses for this offering will be approximately $550,000.

In connection with the offering, the underwriters may purchase and sell ordinary shares in the open market. Purchases and sales in the open market may include short sales, purchases to cover short positions, which may include purchases pursuant to the over-allotment option, and stabilizing purchases.

• Short sales involve secondary market sales by the underwriters of a greater number of ordinary shares than they are required to purchase in the offering.

○ “Covered” short sales are sales of ordinary shares in an amount up to the number of ordinary shares represented by the underwriters’ over-allotment option.

○ “Naked” short sales are sales of ordinary shares in an amount in excess of the number of ordinary shares represented by the underwriters’ over-allotment option.

• Covering transactions involve purchases of ordinary shares either pursuant to the over-allotment option or in the open market after the distribution has been completed in order to cover short positions.

○ To close a naked short position, the underwriters must purchase ordinary shares in the open market after the distribution has been completed. A naked short position is more likely to be created if the underwriters are concerned that there may be downward pressure on the price of the ordinary shares in the open market after pricing that could adversely affect investors who purchase in the offering.

○ To close a covered short position, the underwriters must purchase ordinary shares in the open market after the distribution has been completed or must exercise the over-allotment option. In determining the source of ordinary shares to close the covered short position, the underwriters will consider, among other things, the price of ordinary shares available for purchase in the open market as compared to the price at which they may purchase ordinary shares through the over-allotment option.

• Stabilizing transactions involve bids to purchase ordinary shares so long as the stabilizing bids do not exceed a specified maximum.

Purchases to cover short positions and stabilizing purchases, as well as other purchases by the underwriters for their own accounts, may have the effect of preventing or retarding a decline in the market price of the ordinary shares. They may also cause the price of the ordinary shares to be higher than the price that would otherwise exist in the open market in the absence of these transactions. The underwriters may conduct these transactions on the New York Stock Exchange, in the over-the-counter market or otherwise. If the underwriters commence any of these transactions, they may discontinue them at any time.

The underwriters and their affiliates have performed commercial banking, investment banking and advisory services for us from time to time for which they have received customary fees and reimbursement of expenses. The underwriters and their affiliates may, from time to time, engage in transactions with and perform services for us, certain of the selling stockholders and our and their respective affiliates in the ordinary course of their business for which they may receive customary fees and reimbursement of expenses. In addition, affiliates of some of the underwriters are lenders, and in some cases agents or managers for the lenders, under our Credit Facility.

We have agreed to, severally and not jointly, indemnify the underwriters against certain liabilities, including liabilities under the Securities Act, or to contribute to payments the underwriters may be required to make because of any of those liabilities.

Notice to Prospective Investors in the European Economic Area

In relation to each member state of the European Economic Area (each, a relevant member state), an offer of ordinary shares described in this prospectus supplement may not be made to the public in that relevant member state, except that, an offer of securities may be offered to the public in that relevant member state at any time:

(a)
to any legal entity which is a qualified investor as defined under Article 2 of the Prospectus Regulation;

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(b)
to fewer than 150 natural or legal persons (other than qualified investors as defined under Article 2 of the Prospectus Regulation), subject to obtaining the prior consent of the underwriters for any such offer; or

(c)
in any other circumstances falling within Article 1(4) of the Prospectus Regulation,

provided that no such offer of the Shares shall require the Company or any underwriter to publish a prospectus pursuant to Article 3 of the Prospectus Regulation or supplement a prospectus pursuant to Article 23 of the Prospectus Regulation.

For the purposes of this provision, the expression an “offer to the public” in relation to the shares in any relevant state means the communication in any form and by any means of sufficient information on the terms of the offer and any shares to be offered so as to enable an investor to decide to purchase or subscribe for any shares, and the expression “Prospectus Regulation” means Regulation (EU) 2017/1129. The sellers of the ordinary shares have not authorized and do not authorize the making of any offer of ordinary shares through any financial intermediary on their behalf, other than offers made by the underwriters with a view to the final placement of the ordinary shares as contemplated in this prospectus supplement. Accordingly, no purchaser of the ordinary shares, other than the underwriters, is authorized to make any further offer of the ordinary shares on behalf of the sellers or the underwriters.

Notice to Prospective Investors in the United Kingdom

No ordinary shares have been offered or will be offered pursuant to the offering to the public in the United Kingdom, except that the ordinary shares may be offered to the public in the United Kingdom at any time:

(a)
any legal entity which is a qualified investor as defined under Article 2 of the U.K. Prospectus Regulation;

(b)
to fewer than 150 natural or legal persons (other than qualified investors as defined under Article 2 of the U.K. Prospectus Regulation), subject to obtaining the prior consent of the underwriters for any such offer; or

(c)
in any other circumstances falling within Section 86 of FSMA,

provided that no such offer of the shares shall require the Company or any underwriter to publish a prospectus pursuant to Section 85 of the FSMA or supplement a prospectus pursuant to Article 23 of the U.K. Prospectus Regulation.

For the purposes of this provision, the expression an “offer to the public” in relation to the ordinary shares in the United Kingdom means the communication in any form and by any means of sufficient information on the terms of the offer and any ordinary shares to be offered so as to enable an investor to decide to purchase or subscribe for any ordinary shares.

In addition, in the United Kingdom, this document is for distribution only to, and is directed only at, and any offer subsequently made may only be directed at persons who are “qualified investors” (as defined in the U.K. Prospectus Regulation) (i) who have professional experience in matters relating to investments falling within Article 19(5) of the Financial Services and Markets Act 2000 (Financial Promotion) Order 2005, as amended (the “Order”), (ii) who are high net worth entities or other persons falling within Article 49(2)(a) to (d) of the Order or (iii) who are persons to whom an invitation or inducement to engage in investment activity (within the meaning of section 21 of the FSMA) in connection with the issue or sale of any ordinary shares may otherwise lawfully be communicated or caused to be communicated (all such persons together being referred to as “relevant persons”). This document is directed only at relevant persons and must not be acted on or relied on by persons who are not relevant persons. In the United Kingdom, any investment or investment activity that this document relates to may be made or taken exclusively by relevant persons.

Notice to Prospective Investors in Canada

The shares may be sold only to purchasers purchasing, or deemed to be purchasing, as principal that are accredited investors, as defined in National Instrument 45-106 Prospectus Exemptions or subsection 73.3(1) of the Securities Act (Ontario), and are permitted clients, as defined in National Instrument 31-103 Registration

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Requirements, Exemptions and Ongoing Registrant Obligations. Any resale of the shares must be made in accordance with an exemption from, or in a transaction not subject to, the prospectus requirements of applicable securities laws. Securities legislation in certain provinces or territories of Canada may provide a purchaser with remedies for rescission or damages if this prospectus supplement (including any amendment thereto) contains a misrepresentation, provided that the remedies for rescission or damages are exercised by the purchaser within the time limit prescribed by the securities legislation of the purchaser’s province or territory. The purchaser should refer to any applicable provisions of the securities legislation of the purchaser’s province or territory for particulars of these rights or consult with a legal advisor.

Pursuant to section 3A.3 of National Instrument 33-105 Underwriting Conflicts (NI 33-105), the underwriters are not required to comply with the disclosure requirements of NI 33-105 regarding underwriter conflicts of interest in connection with this offering.

Notice to Prospective Investors in France

Neither this prospectus supplement nor any other offering material relating to the ordinary shares described in this prospectus supplement has been submitted to the clearance procedures of the Autorité des Marchés Financiers or of the competent authority of another member state of the European Economic Area and notified to the Autorité des Marchés Financiers. The ordinary shares have not been offered or sold and will not be offered or sold, directly or indirectly, to the public in France. Neither this prospectus supplement nor any other offering material relating to the ordinary shares has been or will be:

• released, issued, distributed or caused to be released, issued or distributed to the public in France; or

• used in connection with any offer for subscription or sale of the ordinary shares to the public in France.

Such offers, sales and distributions will be made in France only:

• to qualified investors (investisseurs qualifiés) and/or to a restricted circle of investors (cercle restreint d’investisseurs), in each case investing for their own account, all as defined in, and in accordance with articles L.411-2, D.411-1, D.411-2, D.734-1, D.744-1, D.754-1 and D.764-1 of the French Code monétaire et financier;

• to investment services providers authorized to engage in portfolio management on behalf of third parties; or

• in a transaction that, in accordance with article L.411-2-II-1”-or-2”-or 3” of the French Code monétaire et financier and article 211-2 of the General Regulations (Règlement Général) of the Autorité des Marchés Financiers, does not constitute a public offer (appel public à l’épargne).

The ordinary shares may be resold directly or indirectly, only in compliance with articles L.411-1, L.411-2, L.412-1 and L.621-8 through L.621-8-3 of the French Code monétaire et financier.

Notice to Prospective Investors in Hong Kong

The ordinary shares may not be offered or sold in Hong Kong by means of any document other than (i) in circumstances which do not constitute an offer to the public within the meaning of the Companies Ordinance (Cap. 32, Laws of Hong Kong), or (ii) to “professional investors” within the meaning of the Securities and Futures Ordinance (Cap. 571, Laws of Hong Kong) and any rules made thereunder, or (iii) in other circumstances which do not result in the document being a “prospectus” within the meaning of the Companies Ordinance (Cap. 32, Laws of Hong Kong) and no advertisement, invitation or document relating to the ordinary shares may be issued or may be in the possession of any person for the purpose of issue (in each case whether in Hong Kong or elsewhere), which is directed at, or the contents of which are likely to be accessed or read by, the public in Hong Kong (except if permitted to do so under the laws of Hong Kong) other than with respect to ordinary shares which are or are intended to be disposed of only to persons outside Hong Kong or only to “professional investors” within the meaning of the Securities and Futures Ordinance (Cap. 571, Laws of Hong Kong) and any rules made thereunder.

Notice to Prospective Investors in Japan

The ordinary shares offered in this prospectus supplement have not been registered under the Securities and Exchange Law of Japan. The ordinary shares have not been offered or sold and will not be offered or sold,

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directly or indirectly, in Japan or to or for the account of any resident of Japan, except (i) pursuant to an exemption from the registration requirements of the Securities and Exchange Law and (ii) in compliance with any other applicable requirements of Japanese law.

Notice to Prospective Investors in Singapore

This prospectus supplement has not been registered as a prospectus with the Monetary Authority of Singapore. Accordingly, this prospectus supplement and any other document or material in connection with the offer or sale, or invitation for subscription or purchase, of the ordinary shares may not be circulated or distributed, nor may the ordinary shares be offered or sold, or be made the subject of an invitation for subscription or purchase, whether directly or indirectly, to persons in Singapore other than (i) to an institutional investor under Section 274 of the Securities and Futures Act, Chapter 289 of Singapore (the “SFA”), (ii) to a relevant person pursuant to Section 275(1), or any person pursuant to Section 275(1A), and in accordance with the conditions specified in Section 275 of the SFA or (iii) otherwise pursuant to, and in accordance with the conditions of, any other applicable provision of the SFA, in each case subject to compliance with conditions set forth in the SFA.

Where the ordinary shares are subscribed or purchased under Section 275 of the SFA by a relevant person which is:

• a corporation (which is not an accredited investor (as defined in Section 4A of the SFA)) the sole business of which is to hold investments and the entire share capital of which is owned by one or more individuals, each of whom is an accredited investor; or

• a trust (where the trustee is not an accredited investor) whose sole purpose is to hold investments and each beneficiary of the trust is an individual who is an accredited investor,

ordinary shares, debentures and units of ordinary shares and debentures of that corporation or the beneficiaries’ rights and interest (howsoever described) in that trust shall not be transferred within six months after that corporation or that trust has acquired the ordinary shares pursuant to an offer made under Section 275 of the SFA except:

• to an institutional investor (for corporations, under Section 274 of the SFA) or to a relevant person defined in Section 275(2) of the SFA, or to any person pursuant to an offer that is made on terms that such ordinary shares, debentures and units of ordinary shares and debentures of that corporation or such rights and interest in that trust are acquired at a consideration of not less than S$200,000 (or its equivalent in a foreign currency) for each transaction, whether such amount is to be paid for in cash or by exchange of securities or other assets, and further for corporations, in accordance with the conditions specified in Section 275 of the SFA;

• where no consideration is or will be given for the transfer; or

• where the transfer is by operation of law.

Notice to Prospective Investors in Switzerland

The shares may not be publicly offered in Switzerland and will not be listed on the SIX Swiss Exchange (“SIX”) or on any other stock exchange or regulated trading facility in Switzerland. This document has been prepared without regard to the disclosure standards for issuance prospectuses under art. 652a or art. 1156 of the Swiss Code of Obligations or the disclosure standards for listing prospectuses under art. 27 ff. of the SIX Listing Rules or the listing rules of any other stock exchange or regulated trading facility in Switzerland.

Neither this document nor any other offering or marketing material relating to the shares or the offering may be publicly distributed or otherwise made publicly available in Switzerland. Neither this document nor any other offering or marketing material relating to the offering, us, or the shares have been or will be filed with or approved by any Swiss regulatory authority. In particular, this document will not be filed with, and the offer of shares will not be supervised by, the Swiss Financial Market Supervisory Authority (“FINMA”), and the offer of shares has not been and will not be authorized under the Swiss Federal Act on Collective Investment Schemes (“CISA”). The investor protection afforded to acquirers of interests in collective investment schemes under the CISA does not extend to acquirers of shares.

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LEGAL MATTERS

Certain legal matters of U.S. federal law will be passed upon for us by Gibson, Dunn & Crutcher LLP, Houston, Texas. The validity of our ordinary shares and certain other matters of U.K. law will be passed upon for us by Latham & Watkins (London) LLP. Legal counsel to the selling stockholders in connection with this offering are Kirkland & Ellis LLP, Houston, Texas. Legal counsel to the underwriters in connection with this offering are Vinson & Elkins L.L.P., Houston, Texas with respect to U.S. federal law, and A&O Shearman LLP with respect to U.K. law.

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EXPERTS

Independent Registered Public Accounting Firm

The financial statements of Diversified Energy Company PLC incorporated in this prospectus supplement by reference to the Annual Report on Form 20-F for the year ended December 31, 2024 have been so incorporated in reliance on the report of PricewaterhouseCoopers LLP, an independent registered public accounting firm, given on the authority of said firm as experts in auditing and accounting.

The current address of PricewaterhouseCoopers LLP is 569 Brookwood Village, Suite 851, Birmingham, Alabama, 35209.

The audited historical statement of revenues and direct operating expenses for the natural gas and oil properties of OCM Denali Holdings L.L.C. for the year ended December 31, 2023 incorporated by reference in this prospectus supplement by reference to Exhibit 99.2 of Diversified Energy Company PLC’s report on Form 6-K, dated August 20, 2024, has been so incorporated in reliance on the report (which contains an explanatory paragraph relating to the basis of presentation as described in Note 1 to the statement) of PricewaterhouseCoopers LLP, an independent registered public accounting firm, given on the authority of said firm as experts in auditing and accounting.

The audited historical financial statements of Maverick Natural Resources, LLC as of and for the year ended December 31, 2023 incorporated by reference in this prospectus supplement by reference to Exhibit 99.1 of Diversified Energy Company PLC’s report on Form 6-K, dated May 16, 2025, have been so incorporated in reliance on the report of PricewaterhouseCoopers LLP, an independent registered public accounting firm, given on the authority of said firm as experts in auditing and accounting.

The consolidated financial statements of Maverick Natural Resources, LLC as of and for the year ended December 31, 2024 incorporated by reference in this prospectus supplement by reference to Exhibit 99.1 of Diversified Energy Company PLC’s Report on Form 6-K, dated May 16, 2025, have been so incorporated in reliance on the report of BDO USA, P.C., independent auditors, given on the authority of said firm as experts in auditing and accounting.

Independent Petroleum Engineers

The letter report, included as an exhibit to the Company’s annual report on Form 20-F for the year ended December 31, 2024, of Netherland, Sewell & Associates, Inc., independent consulting petroleum engineers, and information with respect to our natural gas, oil and NGL reserves derived from such report, have been referred to and incorporated in this prospectus supplement upon the authority of such firm as experts with respect to such matters covered in such report and in giving such report. The current address of Netherland, Sewell & Associates, Inc. is 2100 Ross Avenue, Suite 2200, Dallas, Texas 75201.

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WHERE YOU CAN FIND MORE INFORMATION

We have filed with the SEC a registration statement (including amendments and exhibits to the registration statement) on Form F-3 under the Securities Act with respect to the ordinary shares offered in this prospectus supplement, which constitutes a part of the registration statement. This prospectus supplement does not contain all of the information set forth in the registration statement or the exhibits and schedules filed with, or incorporated by reference into, the registration statement. For further information with respect to us and our securities, reference is made to the registration statement and the exhibits and schedules filed with, or incorporated by reference into, the registration statement. Statements contained in this prospectus supplement regarding the contents of any contract or any other document that is filed as an exhibit filed with, or incorporated by reference into, the registration statement are not necessarily complete, and each such statement is qualified in all respects by reference to the full text of such contract or other document filed with, or incorporated by reference into, the registration statement. The SEC maintains a website that contains reports, proxy and information statements and other information regarding registrants that file electronically with the SEC. The address is www.sec.gov. We currently make available to the public our annual and interim reports, as well as certain information regarding our corporate governance and other matters on our website www.div.energy. The reference to our website address does not constitute incorporation by reference of the information contained on or available through our website, and you should not consider it to be a part of this prospectus supplement.

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INCORPORATION OF CERTAIN INFORMATION BY REFERENCE

The SEC allows us to “incorporate by reference” into this prospectus supplement information that we file with the SEC. This means that we can disclose important information to you by referring you to those documents. The information incorporated by reference is deemed to be part of this prospectus supplement, except for any information superseded by information contained directly in this prospectus supplement, any subsequently filed document deemed incorporated by reference or any free writing prospectus prepared by or on behalf of us. Information that we later provide to the SEC, and which is deemed to be “filed” with the SEC, will automatically update information previously filed with the SEC, and may replace information included in or incorporated by reference into this prospectus supplement.

We incorporate by reference into this prospectus supplement the documents listed below:

• our Annual Report on Form 20-F for the year ended December 31, 2024, filed with the SEC on March 17, 2025;

• our reports on Form 6-K furnished to the SEC on August 20, 2024 (furnishing certain statements of revenues and direct operating expenses of OCM Denali Holdings, L.L.C. and pro forma financial information of the Company), March 28, 2025, April 9, 2025, April 14, 2025, May 12, 2025, May 16, 2025, May 28, 2025, August 11, 2025 (with respect to Exhibits 99.3 and 99.4), August 13, 2025 and September 9, 2025 (with respect to Appendix 1 to Exhibit 99.1 and Exhibit 99.2); and

• the description of our ordinary shares contained in Exhibit 4.12 to our Annual Report on Form 20-F, filed with the SEC on March 17, 2025.

We also incorporate by reference in this prospectus supplement all subsequent reports on Form 6-K furnished to the SEC that we specifically identify as being incorporated by reference in this prospectus supplement after the date hereof and prior to the completion of an offering of securities under this prospectus supplement.

We will provide, free of charge upon written or oral request, to each person to whom this prospectus supplement is delivered, including any beneficial owner of the securities, a copy of any or all of the information that has been incorporated by reference into this prospectus supplement, but which has not been delivered with the prospectus supplement. Copies of these documents also may be obtained on the “Investor Resources” section of our website at www.div.energy. The information contained on or linked to or from our website is not incorporated by reference into this prospectus supplement and should not be considered part of this prospectus supplement. Requests for such information should be made to us at the following address:

Diversified Energy Company PLC

1600 Corporate Drive

Birmingham, Alabama 35242

Telephone: (205) 408-0909

Attention: Investor Relations

Except as provided above, no other information, including information on our website, is incorporated by reference in this prospectus supplement.

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EXPENSES OF THE OFFERING

The following is a statement of expenses in connection with the distribution of the ordinary shares offered hereby. All amounts shown are estimates except the SEC registration fee and the FINRA fees. The estimates do not include underwriting discounts and commissions and other estimated offering expenses to be paid by us in connection with this offering.

Expenses			Amount
SEC registration fee			$    *
FINRA filing fee			$
Legal fees and expenses			$
Accounting fees and expenses			$
Miscellaneous costs			$
Total			$

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PROSPECTUS

19,910,181 Ordinary Shares

This prospectus relates to the resale, from time to time, of 19,910,181 ordinary shares, nominal (par) value £0.20 per share (the “ordinary shares”), of Diversified Energy Company PLC (the “Company,” “DEC,” “we,” “us,” or “our company”) by the selling shareholders identified herein, originally issued in connection with our acquisition of Maverick Natural Resources, LLC (“Maverick”), which closed on March 14, 2025 (the “Acquisition”). We are registering the securities for resale pursuant to the selling shareholders’ registration rights under that certain registration rights agreement between us and the selling shareholders, entered into in connection with the Acquisition.

The selling shareholders may sell their shares, from time to time, in one or more offerings, at prevailing market prices at the time of sale, at prices related to the prevailing market price, at varying prices determined at the time of sale, or at negotiated prices. The selling shareholders may sell shares in a manner including, but not limited to, regular brokerage transactions, in transactions directly with market makers or investors, in privately negotiated transactions or through agents or underwriters they may select from time to time. See “Plan of Distribution” for more information on the methods of sale that may be used by the selling shareholders.

We are not offering any ordinary shares for sale under this prospectus, and we will not receive any proceeds from the sale of the ordinary shares by the selling shareholders.

Our ordinary shares trade on the New York Stock Exchange (“NYSE”) under the symbol “DEC.” On May 14, 2025, the last reported sale price of our ordinary shares on the NYSE was $13.87 per ordinary share. Our ordinary shares are also admitted to listing on the Official List of the United Kingdom Financial Conduct Authority and are admitted to trading on the Main Market of the London Stock Exchange (“LSE”) under the symbol “DEC.” On May 14, 2025, the last reported sale price of our ordinary shares on the LSE was £10.63 per ordinary share (equivalent to $14.14 per ordinary share based on an assumed exchange rate of £1.00 to $1.3305 as of May 14, 2025).

Investing in our ordinary shares involves risk. Please see “Risk Factors” on page 6 for a discussion of certain risks that you should consider in connection with an investment in our ordinary shares.

Neither the Securities and Exchange Commission nor any U.S. state securities commission has approved or disapproved of these securities or determined if this prospectus is truthful or complete. Any representation to the contrary is a criminal offense.

This prospectus is dated May 16, 2025.

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			Page
ABOUT THIS PROSPECTUS			1
SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS			2
DIVERSIFIED ENERGY COMPANY PLC			5
RISK FACTORS			6
USE OF PROCEEDS			7
SELLING SHAREHOLDERS			8
DESCRIPTION OF SHARE CAPITAL AND ARTICLES OF ASSOCIATION			10
MATERIAL TAX CONSEQUENCES			28
PLAN OF DISTRIBUTION			37
EXPENSES			39
LEGAL MATTERS			40
EXPERTS			40
SERVICE OF PROCESS AND ENFORCEMENT OF CIVIL LIABILITIES			41
WHERE YOU CAN FIND MORE INFORMATION			43
INCORPORATION OF CERTAIN INFORMATION BY REFERENCE			44

For investors outside the United States: Neither we nor the selling shareholders have done anything that would permit this offering or possession or distribution of this prospectus in any jurisdiction, other than the United States, where action for that purpose is required. Persons outside the United States who come into possession of this prospectus must inform themselves about, and observe any restrictions relating to, the offering of our ordinary shares and the distribution of this prospectus outside the United States.

Neither we nor the selling shareholders have authorized anyone to provide you with any information or to make any representations other than those contained in or incorporated by reference into this prospectus, any amendment or supplement to this prospectus, or in any free writing prospectus we have prepared, and neither we nor the selling shareholders take responsibility for, and can provide no assurance as to the reliability of, any other information others may give you. Neither we nor the selling shareholders are making an offer to sell, or seeking offers to buy, these securities in any jurisdiction where the offer or sale is not permitted. The information contained in this prospectus and any accompanying prospectus supplement, as well as the information we previously filed with the SEC and incorporated herein by reference, is accurate as of the date of those documents only, regardless of the time of delivery of this prospectus or the sale of ordinary shares. Our business, financial condition, results of operations and prospects may have changed since such dates.

Notice to Investors

This document is not a prospectus for the purposes of the UK version of Regulation (EU) 2017/1129 as it forms part of domestic law by virtue of the European Union (Withdrawal) Act 2018, as amended (the “UK Prospectus Regulation”) and has not been reviewed and/or approved by the United Kingdom Financial Conduct Authority or any other regulatory authority in the United Kingdom.

No ordinary shares have been offered or will be offered pursuant to the offering to the public in the United Kingdom prior to the publication of a prospectus in relation to the ordinary shares which has been approved by the United Kingdom Financial Conduct Authority, except that the ordinary shares may be offered to the public in the United Kingdom at any time:

a)
to any legal entity which is a qualified investor as defined under Article 2 of the UK Prospectus Regulation;

b)
to fewer than 150 natural or legal persons (other than qualified investors as defined under Article 2 of the UK Prospectus Regulation), subject to obtaining the prior consent of the Company for any such offer; or

c)
in any other circumstances falling within Section 86 of the Financial Services and Markets Act, 2000, as amended (“FSMA”),

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provided that no such offer of the shares shall require the Company to publish a prospectus pursuant to Section 85 of the FSMA or supplement a prospectus pursuant to Article 23 of the UK Prospectus Regulation.

For the purposes of this provision, the expression an “offer to the public” in relation to the ordinary shares in the United Kingdom means the communication in any form and by any means of sufficient information on the terms of the offer and any ordinary shares to be offered so as to enable an investor to decide to purchase or subscribe for any ordinary shares.

In addition, in the United Kingdom, this document is for distribution only to, and is directed only at, and any offer subsequently made may only be directed at persons who are “qualified investors” (as defined in the UK Prospectus Regulation) (i) who have professional experience in matters relating to investments falling within Article 19(5) of the Financial Services and Markets Act 2000 (Financial Promotion) Order 2005, as amended (the “Order”), (ii) who are high net worth entities or other persons falling within Article 49(2)(a) to (d) of the Order or (iii) who are persons to whom an invitation or inducement to engage in investment activity (within the meaning of section 21 of the FSMA) in connection with the issue or sale of any shares of common stock may otherwise lawfully be communicated or caused to be communicated (all such persons together being referred to as “relevant persons”). This document is directed only at relevant persons and must not be acted on or relied on by persons who are not relevant persons. In the United Kingdom, any investment or investment activity that this document relates to may be made or taken exclusively by relevant persons.

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ABOUT THIS PROSPECTUS

Except where the context otherwise requires or where otherwise indicated, the terms “Diversified Energy,” the “Company,” the “Group,” “DEC,” “we,” “us,” “our company” and “our business” refer to Diversified Energy Company PLC, together with its consolidated subsidiaries.

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SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS

This prospectus, any prospectus supplement and the documents incorporated by reference herein and therein contain forward-looking statements that are based on our management’s beliefs and assumptions and on information currently available to our management. In some cases, you can identify forward-looking statements by the following words: “may,” “might,” “will,” “could,” “would,” “should,” “expect,” “plan,” “anticipate,” “intend,” “seek,” “believe,” “estimate,” “predict,” “potential,” “continue,” “contemplate,” “possible” or the negative of these terms or other comparable terminology, although not all forward-looking statements contain these words. Forward-looking statements are not guarantees of performance. We have based forward-looking statements in this prospectus on our current expectations and beliefs about future developments and their potential effect on us.

These statements in this prospectus and the documents incorporated by reference herein include, but are not limited to, the Company’s future plans, expectations, objectives for the Company’s operations, including statements about strategy, synergies, expansion projects, acquisitions and divestitures, future operations; sustainability-related goals, strategies and initiatives, including, among others, those relating our diversity representation targets, reducing methane and greenhouse gas emissions (“GHG”), including our Scope 1 and Scope 2 or net zero goals, environmental management, waste management, safety and asset integrity, health and safety, and community investment and engagement; our plans to achieve our sustainability-related goals and to monitor and report progress; sustainability-related engagement, commitments, and disclosure; and other related items. While this prospectus and the information incorporated by reference herein describe potential future events and matters that may be significant, and with respect to which we may even use the word “material” or “materiality,” the potential significance of these events and matters should not be read as equating to “materiality” as the concept is used in connection with our required disclosures made in response to SEC and exchange rules and regulations.

Any forward-looking statement made by us in this prospectus or incorporated by reference herein speaks only as of the date on which it is made. Factors or events that could cause our actual results to differ may emerge from time to time, and it is not possible for us to predict all of them. Moreover, while the documents incorporated by reference herein may contain information on several sustainability-related topics, including goals and ambitions, there are inherent uncertainties in providing such information, due to the complexity and novelty of many methodologies established for collecting, measuring, and analyzing sustainability-related data. While we anticipate continuing to monitor and report on certain sustainability-related information, we cannot guarantee that such data will be consistent year-to-year, as methodologies and expectations continue to evolve. Additionally, some of the data provided in the documents incorporated by reference herein may be estimated or reliant on estimated information, which is inherently imprecise, and we cannot guarantee that estimates are identified as such in every instance. Furthermore, there are sources of uncertainty and limitations that exist that are beyond our control and could impact our plans and timelines, including the reliance on technological and regulatory advancements and market participants’ behaviors and preferences. We undertake no obligation to publicly update any forward-looking statement whether as a result of new information, future development, or otherwise, except as may be required by law. In some cases, the information in the documents incorporated by reference herein is prepared, or based on information prepared, by government agencies or third-party vendors and consultants and is not independently verified by the Company. Furthermore, unless explicitly noted in each instance where it occurs, the relevant sustainability-related data provided in the documents incorporated by reference herein has not been audited or subject to any third-party assurance process. This data should not be interpreted as any form of guarantee or assurance of accuracy, future results or trends, and we make no representation or warranty as to third-party information.

These statements involve risks, uncertainties and other factors that may cause our actual results, levels of activity, performance or achievements to be materially different from the information expressed or implied by these forward-looking statements. Although we believe that we have a reasonable basis for each forward-looking statement contained in this prospectus and the documents incorporated by reference herein, we caution you that these statements are based on a combination of facts and factors currently known by us and our projections of the future, about which we cannot be certain. Forward-looking statements contained in this prospectus and the documents incorporated by reference herein are inherently subject to significant business, economic, competitive, regulatory and other risks and uncertainties (some of which are beyond our control) and assumptions that could cause our actual results to differ materially from our historical experience and present expectations or projections. We caution you that assumptions, beliefs, expectations, intentions and projections about future events may and

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often do vary materially from actual results. Therefore, we cannot assure you that actual results will not differ materially from those expressed or implied by our forward-looking statements. Known material factors that could cause actual results to differ from those expressed in or implied by forward-looking statements contained in this prospectus or incorporated by reference herein are described under “Risk Factors” and in other sections of this prospectus, and in the section titled “Risk Factors” in our latest annual report on Form 20-F, filed with the SEC, which is incorporated by reference herein and our other filings with the SEC that are incorporated by reference herein. Such factors include, but are not limited to:

• our ability to integrate effectively the assets we acquired from Maverick into our existing operations;

• declines in, the sustained depression of, or increased volatility in the prices we receive for our natural gas, oil and NGLs, or increases in the differential between index natural gas, oil and NGL prices and prices received;

• operating risks, including, but not limited to, risks related to properties where we do not serve as the operator;

• the adequacy of our capital resources and liquidity, including access to additional borrowing capacity under our revolving credit facility and the ability to obtain future financing on commercially reasonable terms or at all;

• the impact of actual or anticipated changes in tariffs and trade policies;

• the effects of and changes in government regulation, permitting and other legal requirements, including, but not limited to, new legislation;

• laws and regulations relating to climate change and GHG emissions and physical risks associated with climate change;

• attention to sustainability matters and conservation measures and risks related to our public statements with respect to such matters that may be subject to heightened scrutiny from public and governmental authorities, risks that the Company may face regarding potentially conflicting anti-environmental, social and governance initiatives from U.S., state or U.K./European governments, which could lead to increased litigation risk from private parties and governmental authorities or regulatory bodies or increased costs of compliance;

• potential liability resulting from pending or future litigation, government investigations and other proceedings;

• the effects of environmental, natural gas, oil and NGL related and occupational health and safety laws and regulations, including, but not limited to delays, curtailment or cessation of operations or exposure to material costs and liabilities;

• difficult and adverse conditions in the domestic and global capital and credit markets and economies, including effects of diseases, political instability, including but not limited to instability related to the military conflict in Ukraine and in Israel and surrounding countries, and pricing and production decisions;

• the geographic concentration of our operations;

• potential financial losses or earnings reductions resulting from our commodity price risk management program or any inability to manage our commodity price risks;

• the failure by counterparties to our derivative risk management activities to perform their obligations;

• shortages of oilfield equipment, supplies, services and qualified personnel and increased costs for such equipment, supplies, services and personnel;

• access to pipelines, storage platforms, shipping vessels and other means of transporting and storing and refining gas and oil, including without limitation, changes in availability of, and access to, pipeline usage;

• risks and liabilities associated with acquired properties, including, but not limited to, the assets acquired in our most recent acquisitions and any future acquisitions;

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• uncertainties about the estimated quantities of our natural gas, oil and NGL reserves;

• uncertainties about our ability to replace reserves;

• our ability to generate environmental credits attributable through the production of coal mine methane;

• our hedging strategy;

• competition in the natural gas, oil and NGL industry;

• our substantial existing indebtedness; and

• risks related to and the effects of actual or anticipated health emergencies or pandemics.

Reserve engineering is a process of estimating underground accumulations of natural gas, oil and NGLs that cannot be measured in an exact way. The accuracy of any reserve estimate depends on the quality of available data, the interpretation of such data and price and cost assumptions made by our reserve engineers. In addition, the results of drilling, testing and production activities may justify revisions of estimates that were made previously. If significant, such revisions would change the schedule of any further production and development drilling. Accordingly, reserve and PV-10 estimates may differ significantly from the quantities of natural gas, oil and NGLs that are ultimately recovered.

You should refer to the section titled “Risk Factors” of this prospectus for a discussion of other important factors that may cause our actual results to differ materially from those expressed or implied by our forward-looking statements. As a result of these factors, we cannot assure you that the forward-looking statements in this prospectus will prove to be accurate.

In addition, statements that “we believe” and similar statements reflect our beliefs and opinions on the relevant subject. These statements are based upon information available to us as of the date of this prospectus, and although we believe such information forms a reasonable basis for such statements, such information may be limited or incomplete, and our statements should not be read to indicate that we have conducted a thorough inquiry into, or review of, all potentially available relevant information. These statements are inherently uncertain, and investors are cautioned not to unduly rely upon these statements. Furthermore, if our forward-looking statements prove to be inaccurate, the inaccuracy may be material. In light of the significant uncertainties in these forward-looking statements, you should not regard these statements as a representation or warranty by us or any other person that we will achieve our objectives and plans in any specified time frame, or at all. We undertake no obligation to publicly update any forward-looking statements, whether as a result of new information, future events or otherwise, except as required by law.

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DIVERSIFIED ENERGY COMPANY PLC

We are a leading independent energy company focused on natural gas and liquids production, transportation, marketing and well retirement, primarily located within the Appalachian and Central regions of the United States. Our strategy is to acquire existing long-life assets and to make investments in those assets to improve environmental and operational performance under a modern field management philosophy and stewardship-based approach to generate cash flows and maximize shareholder returns. Our target assets are characterized by multi-decade production profiles and low decline rates, and we place a particular focus on assets whose value we believe can be enhanced by scale and vertical integration through complementary midstream infrastructure or by our operational and marketing framework.

We were incorporated as a public limited company with the legal name Diversified Gas & Oil plc under the laws of the United Kingdom on July 31, 2014 with the company number 09156132. On May 6, 2021, we changed our company name to Diversified Energy Company PLC.

Our registered office is located at 4th Floor Phoenix House, 1 Station Hill, Reading, Berkshire United Kingdom, RG1 1NB. In February 2017, our shares were admitted to trading on the Alternative Investment Market of the LSE under the ticker “DGOC.” In May 2020, our shares were admitted to listing on the Official List of the United Kingdom Financial Conduct Authority and to trading on the Main Market of the LSE. With the change in corporate name in 2021, our shares listed on the LSE began trading under the new ticker “DEC.” In December 2023, our shares were admitted to trading on the NYSE under the ticker “DEC.”

Our principal executive offices are located at 1600 Corporate Drive, Birmingham, Alabama 35242, and our telephone number at that location is +1 (205) 408-0909. Our website address is www.div.energy. The information contained on, or that can be accessed from, our website does not form part of this prospectus. We have included our website address solely as an inactive textual reference.

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RISK FACTORS

An investment in our ordinary shares involves a high degree of risk. Before investing in our ordinary shares, you should carefully consider all of the information set forth in this prospectus and the documents incorporated by reference herein, and the risks discussed under the caption “Risk Factors” in our latest Annual Report on Form 20-F filed with the SEC and any subsequent updates and other reports and documents we file with the SEC described in our reports on Form 6-K and which are incorporated by reference herein and may be amended, supplemented or superseded from time to time by other reports we file with the SEC in the future. Please see “Where You Can Find More Information” and “Incorporation of Certain Information by Reference.” Additional risks not presently known to us or that we currently deem immaterial may also impair our business operations. Our business, financial condition or results of operations could be materially and adversely affected by any of such risks or additional risks and uncertainties that are currently immaterial or unknown. The trading price and value of our ordinary shares could decline due to any of these risks, and you may lose all or part of your investment. Please see “Special Note Regarding Forward-Looking Statements.”

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USE OF PROCEEDS

The selling shareholders will receive all of the proceeds from any sales of our ordinary shares offered by this prospectus. We will not receive any of the proceeds from the sale of our ordinary shares offered hereby.

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SELLING SHAREHOLDERS

We have prepared this prospectus to allow the selling shareholders to offer and sell from time to time up to 19,910,181 ordinary shares issued to the selling shareholders in connection with the Acquisition. The following table sets forth (i) the name of the selling shareholders and (ii) the number of ordinary shares beneficially owned by each selling shareholder.

The information set forth in the table below is based upon information obtained from the selling shareholders as of May 14, 2025. Except as indicated by footnote, to our knowledge, the person named in the table below has sole voting and investment power with respect to all ordinary shares shown as beneficially owned by it. Beneficial ownership is determined in accordance with Rule 13d-3(d) under the U.S. Securities Exchange Act of 1934, as amended (the “Exchange Act”). The percentage of shares beneficially owned after the offering is based on 79,690,741 ordinary shares outstanding as of May 9, 2025 and 19,910,181 ordinary shares offered hereby.

Selling Shareholders(1)			Number of Ordinary Shares Owned Prior to the Offering			Percentage of Ordinary Shares Owned Prior to the Offering			Maximum Number of Ordinary Shares to be Sold Pursuant to this Prospectus			Number of Ordinary Shares Owned After the Offering			Percentage of Ordinary Shares Owned After the Offering
EIG Energy Fund XVI, L.P.(2)			5,220,365			5.24%			5,220,365			—			—
FSEP Investments, Inc.(3)			3,682,450			3.70%			3,682,450			—			—
EIG Energy Fund XVI Holdings Splitter (FourPoint), L.P.(2)			2,385,694			2.40%			2,385,694			—			—
EIG Holdings Carry Splitter (Redwood), L.P.(2)			1,934,731			1.94%			1,934,731			—			—
EIG Energy Fund XV, L.P.(2)			1,418,380			1.42%			1,418,380			—			—
FSIC Investments, Inc.(4)			1,171,685			1.18%			1,171,685			—			—
EIG Energy Fund XV Blocker Series C (Fourpoint), LLC(2)			1,152,795			1.16%			1,152,795			—			—
EIG Energy Fund XI-A, L.P.(2)			968,093			*			968,093			—			—
FSIC II Investments, Inc.(5)			725,328			*			725,328			—			—
EIG Redwood Co-Investment, L.P.(2)			624,708			*			624,708			—			—
EIG Energy XV Blocker Agent (Redwood), Inc.(2)			541,997			*			541,997			—			—
EIG Energy Fund XVI-E, L.P.(2)			83,955			*			83,955			—			—

*
Less than 1%.

(1)
The ordinary shares are held by GTU Ops in its capacity as nominee for Computershare Trust Company N.A. (the “Depositary”), as the depositary and issuer of depositary receipts, acting under the terms of a DR agreement dated December 11, 2023. The Depositary has issued depositary receipts in certificated form in respect of the underlying entitlement to ordinary shares on a one for one basis to the selling shareholders.

(2)
EIG Redwood Co-Investment GP, LLC (“EIG Redwood Co-Investment GP”) is the general partner of EIG Redwood Co-Investment, L.P. (“Redwood Co-Investment”). EIG Energy Fund XV GP, LLC (“EIG Fund XV GP”) is the general partner of EIG Energy Fund XV, L.P. (“Fund XV”) and EIG Energy Fund XV-A, L.P. (“Fund XV-A”). EIG Energy Fund XVI GP, LLC (“EIG Fund XVI GP,” and together with EIG Redwood Co-Investment GP and EIG Fund XV GP, the “General Partners”) is the general partner of EIG Holdings Carry Splitter (Redwood), L.P. (“Carry Splitter (Redwood)”), EIG Energy Fund XVI, L.P. (“Fund XVI”), EIG Energy Fund XVI-E, L.P. (“Fund XVI-E”), and EIG Energy Fund XVI Holdings Splitter (Fourpoint), L.P. (“Fund XVI Holdings Splitter (Fourpoint)”). EIG Energy Fund XV Blocker Series C (Fourpoint), LLC (“Fund XV Blocker Series C (Fourpoint)”) is managed directly by EIG Management Company, LLC. Jean Powers is the sole director and officer of EIG Energy XV Blocker Agent (Redwood) Inc. (“Fund XV Blocker Agent (Redwood),” and together with Redwood Co-Investment, Fund XV, Fund XV-A, Carry Splitter (Redwood), Fund XVI, Fund XVI-E, Fund XVI Holdings Splitter (Fourpoint), and Fund XV Blocker Series C (Fourpoint), the “EIG Fund Entities”). To the extent applicable, the General Partners have constituted investment committees that are, directly or indirectly, responsible for making investment decisions for the EIG Fund Entities. The members of the relevant investment committees are R. Blair Thomas and Randall S. Wade. Mr. Wade also sits on the board of directors of the Company. The business address of the EIG Fund Entities is 600 New Hampshire Ave NW, Suite 1200, Washington, DC 20037.

(3)
The ordinary shares are directly beneficially owned by FSEP Investments, Inc., a wholly-owned subsidiary of FS Specialty Lending Fund. FS/EIG Advisor, LLC is the investment adviser to FS Specialty Lending Fund. FS Investment Advisor, LLC is a member of FS/EIG Advisor, LLC and is responsible for appointing the investment committee members responsible for making investment decisions with respect to the ordinary shares. The address for the FS entities is 201 Rouse Boulevard, Philadelphia, PA 19112.

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(4)
The ordinary shares are directly beneficially owned by FSIC Investments, Inc., a wholly-owned subsidiary of FS KKR Capital Corp. (“FSK”). FS/KKR Advisor, LLC (“FS/KKR Advisor”) is the investment adviser to FSK. FSJV Holdco, LLC and KKR Credit Advisors (US) LLC are members of FS/KKR Advisor and are responsible for appointing the investment committee members responsible for making investment decisions with respect to the ordinary shares. The address for the FS entities is 201 Rouse Boulevard, Philadelphia, PA 19112.

(5)
The ordinary shares are directly beneficially owned by FSIC II Investments, Inc., a wholly-owned subsidiary of FSK. FS/KKR Advisor is the investment adviser to FSK. FSJV Holdco, LLC and KKR Credit Advisors (US) LLC are members of FS/KKR Advisor and are responsible for appointing the investment committee members responsible for making investment decisions with respect to the ordinary shares. The address for the FS entities is 201 Rouse Boulevard, Philadelphia, PA 19112.

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DESCRIPTION OF SHARE CAPITAL AND ARTICLES OF ASSOCIATION

The following is a description of the material terms of the registrant’s articles of association (the “Articles of Association”). The following description may not contain all of the information that is important to you, and we therefore refer you to our Articles of Association, a copy of which is filed with the SEC as an exhibit to the registration statement of which this prospectus forms a part.

General

We were incorporated as a public limited company with the legal name Diversified Gas & Oil plc under the laws of the United Kingdom on July 31, 2014 with the company number 09156132. On May 6, 2021, we changed our company name to Diversified Energy Company PLC. Our registered office is 4th Floor Phoenix House, 1 Station Hill, Reading, Berkshire, United Kingdom, RG1 1NB. The principal legislation under which we operate and our shares are issued is the Companies Act 2006.

As of April 30, 2025, our issued share capital amounted to approximately £16 million, represented by 80,874,837 ordinary shares with a nominal value of £0.20 per share. All issued ordinary shares are fully paid.

As of April 30, 2025, there were approximately 405 holders of record of our ordinary shares, which does not include beneficial owners holding our securities through nominee names.

Ordinary Shares

The following summarizes the rights to which holders of our ordinary shares are entitled pursuant to the Articles of Association:

• each holder of our ordinary shares is entitled to one vote per ordinary share on all matters to be voted on by shareholders generally;

• the holders of the ordinary shares shall be entitled to receive notice of, attend, speak and vote at our general meetings; and

• holders of our ordinary shares are entitled to receive such dividends as are recommended by our board of directors and declared by our shareholders.

Registered Shares

We are required by the Companies Act 2006 to keep a register of our shareholders. Under UK law, the ordinary shares are deemed to be issued when a person acquires the unconditional right to be included in the Company’s register of members in respect of the shares. The share register is therefore prima facie evidence of the identity of our shareholders and the shares that they hold. The share register generally provides limited, or no, information regarding the ultimate beneficial owners of our ordinary shares. Our share register is maintained by our registrar, Computershare Investor Services PLC.

Under the Companies Act 2006, we must enter an allotment of shares in our share register as soon as practicable and in any event within two months of the allotment. We will perform all procedures necessary to update the share register to reflect the ordinary shares being sold in an offering pursuant to this prospectus. We are also required by the Companies Act 2006 to register a transfer of shares (or give the transferee notice of and reasons for refusal) as soon as practicable and in any event within two months of receiving notice of the transfer.

We, any of our shareholders or any other affected person may apply to the court for rectification of the share register if:

• the name of any person, without sufficient cause, is wrongly entered in or omitted from our register of shareholders; or

• there is a default or unnecessary delay in entering on the register the fact of any person having ceased to be a shareholder or on whose shares we have a lien, provided that such refusal does not prevent dealings in the shares taking place on an open and proper basis.

Preemptive Rights

UK law generally provides shareholders with preemptive rights when new shares are issued for cash; however, it is possible for a company’s articles of association, or shareholders in general meeting, to exclude preemptive rights. Such an exclusion of preemptive rights may be for a maximum period of up to five years

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from the date of adoption of the articles of association, if the exclusion is contained in the articles of association, or from the date of the shareholder resolution, if the exclusion is by shareholder resolution. In either case, this exclusion would need to be renewed by the company’s shareholders upon its expiration (i.e., at least every five years).

On April 9, 2025, our shareholders approved the exclusion of preemptive rights, for an aggregate nominal value of up to £3,239,606, representing not more than 20% of the issued share capital as at March 14, 2025, subject to certain conditions, with such authority expiring at the conclusion of our next annual general meeting or, if earlier, June 30, 2026. Such exclusion will need to be renewed upon expiration (i.e., on the conclusion of our next annual general meeting or, if earlier, June 30, 2026) to remain effective, but may be sought more frequently for additional five-year terms (or any shorter period).

Options

As of April 30, 2025, there were options to purchase 145,154 ordinary shares outstanding with a weighted-average exercise price of £17.36 ($22.09) per share. These options lapse after ten years from the date of the grant.

Articles of Association

Shares and Rights Attaching to Them

Objects

The objects of our Company are unrestricted.

Rights Attached to Shares

Subject to the Companies Act 2006 and to the rights conferred on the holders of any other shares, any share may be issued with or have attached to it such rights and restrictions as the Company may by ordinary resolution decide or, if no such resolution is in effect or so far as the resolution does not make specific provision, as the board of directors may decide.

Voting Rights

Subject to the provisions of the Companies Act 2006 and any restrictions imposed in the Articles of Association and any rights or restrictions attached to any class of shares of our share capital, on a resolution, on a show of hands:

• every shareholder present in person shall have one vote;

• each proxy present who has been duly appointed by one or more shareholders entitled to vote on the resolution has one vote unless the proxy has been appointed by more than one shareholder entitled to vote on the resolution in which case: (i) where the proxy has been instructed by one or more of such shareholders to vote for the resolution and by one or more of such shareholders to vote against the resolution the proxy has one vote for and one vote against the resolution; or (ii) where the proxy has been instructed by, or exercises his discretion given by, one or more of those shareholders to vote for the resolution and has been instructed by, or exercises his discretion given by, one or more other of those shareholders to vote against it, a proxy has one vote for and one vote against the resolution; and

• each person authorized by a corporation to exercise voting powers on behalf of the corporation is entitled to exercise the same voting powers as the corporation would be entitled to unless a corporation authorizes more than one person, in which case: (i) if more than one person authorized by the same corporation purport to exercise the power to vote on a show of hands in respect of the same shares in the Company and exercise the power in the same way as each other, the power is treated as exercised in that way; or (ii) if more than one person authorized by the same corporation purports to exercise the power to vote on a show of hands in respect of the same shares in the Company, and they do not exercise the power in the same way as each other, the power is treated as not exercised.

Subject to the provisions of the Companies Act 2006 and any restrictions imposed by the Articles of Association and any rights or restrictions attached to any class of shares of our share capital, on a vote on a

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resolution on a poll, every shareholder present shall have one vote for every ordinary share in our share capital held by him or his appointee, or and if entitled to more than one vote need not, if he votes, use all his votes or cast all his votes in the same way.

For so long as any share are held in a settlement system operated by DTC and a DTC Depositary holds legal title to shares in our capital for DTC, any resolution put to the vote of a general meeting must be decided on a poll. Subject to the foregoing, at a general meeting, a resolution put to the vote of the meeting shall be decided on a show of hands, unless (before, or immediately after the declaration of the result of, the show of hands or on the withdrawal of any other demand for a poll) a poll is demanded by:

• the chairman of the meeting;

• at least five shareholders present in person or by proxy having the right to vote on the resolution; or

• a shareholder or shareholders present in person or by proxy representing in aggregate not less than 10% of the total voting rights of all the shareholders having the right to vote on the resolution (excluding any voting rights attached to any shares in the Company held as treasury shares); or

• a shareholder or shareholders present in person or by proxy holding shares conferring the right to vote on the resolution on which an aggregate sum has been paid up equal to not less than 10% of the total sum paid up on all the shares conferring that right (excluding shares in the Company conferring a right to vote on the resolution which are held as treasury shares),

and a demand for a poll by a person as proxy for a shareholder shall be as valid as if the demand were made by the shareholder himself.

Restrictions on Voting

Subject to the board of directors’ ability to decide otherwise, no shareholder shall be entitled to be present or to be counted in the quorum or vote, either in person or by proxy, at any general meeting or at any separate class meeting of the holders of a class of shares or on a poll or to exercise other rights conferred by the shareholders in relation to the meeting or poll, unless all calls or other monies due and payable in respect of the shareholder’s shares have been paid up.

The board of directors may from time to time make calls upon the shareholders in respect of any money unpaid on their shares and each shareholder shall (subject to at least 14 clear days’ notice specifying the time or times and place of payment) pay at the time or times so specified the amount called on their shares.

If a shareholder or a person appearing to be interested in shares held by that shareholder has been issued with a notice under section 793 of the Companies Act 2006 (“Section 793 Notice”) by the Company and has failed in relation to those shares (“Default Shares” which expression includes any shares issued after the date of such notice in right of those shares) to respond to the Section 793 Notice by not providing the information required within 14 days following the date of service of the notice, the shareholder holding the Default Shares shall not be entitled in respect of the Default Shares to be present or to vote (either in person or representative or proxy) at a general meeting or a separate meeting of the holders of the same class of shares, or on a poll or to exercise other rights conferred by virtue of being a shareholder of the Company. For additional information permissible actions by the Company’s directors with respect to Default Shares, see below under the subsection titled “—Other UK Law Considerations-Disclosure of Interest in Shares.” The restriction on voting shall cease to apply: (i) if the shares are transferred by means of an excepted transfer but only in respect of the shares transferred; or (ii) at the end of the period of seven days (or such shorter period as the board of directors may determine) following receipt by the Company of the information required by the Section 793 Notice and the board of directors being fully satisfied that such information is full and complete; provided, however, the board of directors may waive these restrictions, in whole or in part, at any time.

Dividends

The Company may, by ordinary resolution, declare a dividend to be paid to the shareholders, according to their respective rights and interests in the profits, and may fix the time for payment of such dividend, but no dividend shall exceed the amount recommended by the board of directors.

The board of directors may pay such interim dividends as appear to the board of directors to be justified by the financial position of the Company and may also pay any dividend payable at a fixed rate at intervals settled

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by the board of directors whenever the financial position of the Company, in the opinion of the board of directors, justifies its payment. If the board of directors acts in good faith, none of the directors shall incur any liability to the holders of shares conferring preferred rights for any loss such holders may suffer in consequence of the payment of an interim dividend on any shares having nonpreferred or deferred rights.

No dividend will be payable except out of profits of the Company available for distribution in accordance with the provisions of the Companies Act 2006, or in excess of the amount recommended by the board of directors. If, in the opinion of the board of directors, the profit of the Company justifies such payments, the board of directors may: (i) pay the fixed dividends on any class of shares carrying a fixed dividend expressed to be payable on fixed dates on the half-yearly or other dates prescribed for payment; and (ii) pay interim dividends of such amounts and on such dates as it thinks fit.

Subject to the provisions of the Companies Act 2006 and except as otherwise provided by our Articles of Association or by the rights or privileges attached to any shares carrying a preferential or special rights to dividends, Company profits will be used to pay dividends on shares and all dividends shall be declared and paid according to the amounts paid up on the shares and shall be apportioned and paid pro rata according to the amounts paid up on the shares during any part of the period in respect of which the dividend is paid.

No dividend or other monies payable by us on or in respect of any share shall bear interest against us. Any dividend unclaimed or retained in accordance with our Articles of Association after a period of 12 years from the date such dividend became due for payment will be forfeited and revert to us. The payment of any unclaimed dividend, interest or other sum payable by the Company on or in respect of any share into a separate account shall not constitute the Company a trustee in respect of it.

Dividends may be declared or paid in any currency. The board of directors may agree with any shareholder that dividends which may at any time or from time to time be declared or become due on his shares in one currency shall be paid or satisfied in another, and may agree the basis of conversion to be applied and how and when the amount to be paid in the other currency shall be calculated and paid and for the Company or any other person to bear any costs involved.

Upon the recommendation of the board of directors and with the sanction of an ordinary resolution of the Company, all or any part of the dividend can be paid by the distribution of specific assets and the board of directors must give effect to such ordinary resolution. With the sanction of an ordinary resolution of the Company, the board of directors may offer any holders of ordinary shares the right to elect to receive in lieu of a dividend an allotment of ordinary shares credited as fully paid up, instead of or part of a cash dividend, subject to such exclusions or arrangements as the board of directors may deem necessary or expedient.

Change of Control

There is no specific provision in the Articles of Association that would have the effect of delaying, deferring or preventing a change of control.

Distributions on Winding Up

If the Company is in liquidation, the liquidator may, with the authority of a special resolution of the Company and any other authority required by the Companies Act 2006:

• divide among the shareholders in specie the whole or any part of the assets of the Company and, for that purpose, value any assets and determine how the division shall be earned out as between the shareholders or different classes of shareholders; or

• vest the whole or any part of the assets in trustees upon such trusts for the benefit of shareholders as the liquidator, with the like sanction, shall think fit but no shareholder shall be compelled to accept any assets upon which there is any liability.

Variation of Rights

Whenever the share capital of the Company is divided into different classes of shares, all or any of the rights for the time being attached to any class of shares in issue may from time to time (whether or not the Company is being wound up) be varied in such manner as those rights may provide or (if no such provision is made) either with the consent in writing of the holders of three-fourths in nominal value of the issued shares of

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that class or with the authority of a special resolution passed at a separate general meeting of the holders of those shares. The Companies Act 2006 provides a right to object to the variation of the share capital by the shareholders who did not vote in favor of the variation. Should an aggregate of 15% of the shareholders of the issued shares in question apply to the court to have the variation cancelled, the variation shall have no effect unless and until it is confirmed by the court.

Unless otherwise expressly provided by the rights attached to any class of shares those rights shall not be deemed to be varied by the creation or issue of further shares ranking pari passu with them or by the purchase or redemption by the Company of any of its own shares.

Alteration to Share Capital

We may, by ordinary resolution of shareholders, consolidate and divide all or any of our share capital into shares of larger nominal value than our existing shares, or sub-divide our shares or any of them into shares of a smaller nominal value. We may, by special resolution of shareholders, confirmed by the court, reduce our share capital or any capital redemption reserve or any share premium account in any manner authorized by the Companies Act 2006. We may redeem or purchase all or any of our shares as described in the subsection titled “—Other UK Law Considerations—Purchase of Own Shares.”

Preemption Rights

In certain circumstances, our shareholders may have statutory preemption rights under the Companies Act 2006 in respect of the allotment of new shares as described in the subsection titled “—Preemptive Rights” above and the subsection titled “—Differences in Corporate Law—Preemptive Rights” below.

Transfer of Shares

Subject to the restrictions in the Articles of Association, a shareholder may transfer all or any of his shares in any manner which is permitted by the Companies Act 2006 and is from time to time approved by the board of directors.

An instrument of transfer of a certificated share may be in any usual form or in any other form which the board of directors may approve and shall be signed by or on behalf of the transferor and (except in the case of a fully paid share) by or on behalf of the transferee.

The board of directors may, in its absolute discretion refuse to register any instrument of transfer of a certificated share:

• which is not fully paid up but, in the case of a class of shares which has been admitted to official listing by the United Kingdom Financial Conduct Authority, not so as to prevent dealings in those shares from taking place on an open and proper basis; or

• on which the Company has a lien.

The board of directors may also refuse to register any instrument of transfer of a certificated share unless it is:

• left at the office, or at such other place as the board of directors may decide, for registration;

• accompanied by the certificate for the shares to be transferred and such other evidence (if any) as the board of directors may reasonably require to prove the title of the intending transferor or his right to transfer the shares; and

• in respect of only one class of shares.

All instruments of transfer which are registered may be retained by the Company, but any instrument of transfer which the board of directors refuses to register shall (except in any case where fraud or any other crime involving dishonesty is suspected in relation to such transfer) be returned to the person presenting it.

Shareholder Meetings

Annual General Meetings

In accordance with the Companies Act 2006, we are required in each year to hold an annual general meeting in addition to any other general meetings in that year and to specify the meeting as such in the notice

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convening it. The annual general meeting shall be convened whenever and wherever the board of directors sees fit, subject to the requirements of the Companies Act 2006, as described in the subsections titled “—Differences in Corporate Law—Annual General Meeting” and “—Differences in Corporate Law—Notice of General Meetings” below.

Notice of General Meetings

The arrangements for the calling of general meetings are described in the subsection titled “ —Differences in Corporate Law—Notice of General Meetings” below.

Quorum of General Meetings

No business shall be transacted at any general meeting unless a quorum is present. At least two shareholders present in person or by proxy and entitled to vote shall be a quorum for all purposes. If within 15 minutes from the time fixed for holding a general meeting a quorum is not present, the meeting, if convened on the requisition of shareholders, shall be dissolved. In any other case, it shall stand adjourned for ten clear days (or, if that day is a Saturday, a Sunday or a holiday, to the next working day) and at the same time and place, or electronic platform, as the original meeting, or, subject to Article 36.4 of our Articles of Association and the Companies Act 2006, to such other day, and at such other time and place, or electronic platform, as the board of directors may decide. If at an adjourned meeting a quorum is not present within 15 minutes from the time fixed for holding the meeting, the meeting shall be dissolved.

Class Meetings

The provisions in the Articles of Association relating to general meetings apply to every separate general meeting of the holders of a class of shares except that:

• the quorum for such class meeting shall be two holders in person or by proxy representing not less than one-third in nominal value of the issued shares of the class (excluding any shares held in treasury);

• at the class meeting, a holder of shares of the class present in person or by proxy may demand a poll and shall on a poll be entitled to one vote for every share of the class held by him; and

• if at any adjourned meeting of such holders a quorum is not present at the meeting, one holder of shares of the class present in person or by proxy at an adjourned meeting constitutes a quorum.

Directors

Number of Directors

The board of directors (other than alternate directors) shall not, unless otherwise determined by an ordinary resolution of the Company, be less than two nor more than 15 in number.

Appointment of Directors

The Company may by ordinary resolution elect any person who is willing to act to be a director, either to fill a vacancy or as an additional director, but so that the total number of directors shall not exceed any maximum number fixed by or in accordance with our Articles of Association.

No person (other than a director retiring in accordance with our Articles of Association) shall be elected or re-elected a director at any general meeting unless:

• he is recommended by the board of directors; or

• not less than 14 nor more than 42 days before the date appointed for the meeting there has been given to the Company, by a shareholder (other than the person to be proposed) entitled to vote at the meeting, notice of his intention to propose a resolution for the election of that person, stating the particulars which would, if he were so elected, be required to be included in the Company’s register of directors and a notice executed by that person of his willingness to be elected.

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Every resolution of a general meeting for the election of a director shall relate to one named person and a single resolution for the election of two or more persons shall be void, unless a resolution that it shall be so proposed has been first agreed to by the meeting without any vote being cast against it.

At each annual general meeting every director shall retire from office. A retiring director shall be eligible for re-election, and a director who is re-elected will be treated as continuing in office without a break.

A retiring director who is not re-elected shall retain office until the close of the meeting at which he retires.

If the Company, at any meeting at which a director retires in accordance with our Articles of Association, does not fill the office vacated by such director, the retiring director, if willing to act, shall be deemed to be re-elected, unless at the meeting a resolution is passed not to fill the vacancy or to elect another person in his place or unless the resolution to re-elect him is put to the meeting and lost.

Directors’ Interests

If a director is in any way, directly or indirectly, interested in a proposed transaction or arrangement with the Company, he must declare the nature and extent of that interest to the other directors. Where a director is in any way, directly or indirectly, interested in a transaction or arrangement that has been entered into by the Company, he must declare the nature and extent of his interest to the other directors, unless the interest has already been declared.

Subject to the Companies Act 2006 and to declaring his interest in accordance with the Articles of Association, a director may:

• enter into or be interested in any transaction or arrangement with the Company, either with regard to his tenure of any office or position in the management, administration or conduct of the business of the Company or as vendor, purchaser or otherwise;

• hold any other office or place of profit with the Company (except that of auditor) in conjunction with his office of director for such period (subject to the Companies Act 2006) and upon such terms as the board of directors may decide and be paid such extra remuneration for so doing (whether by way of salary, commission, participation in profits or otherwise) as the board of directors may decide, either in addition to or in lieu of any remuneration under any other provision of our Articles of Association;

• act by himself or his firm in a professional capacity for the Company (except as auditor) and be entitled to remuneration for professional services as if he were not a director;

• be or become a shareholder or director of, or hold any other office or place of profit under, or otherwise be interested in, any holding company or subsidiary undertaking of that holding company or any other company in which the Company may be interested. The board of directors may cause the voting rights conferred by the shares in any other company held or owned by the Company or exercisable by them as directors of that other company to be exercised in such manner in all respects as it thinks fit (including the exercise of voting rights in favor of any resolution appointing the directors or any of them as directors or officers of the other company or voting or providing for the payment of any benefit to the directors or officers of the other company); and

• be or become a director of any other company in which the Company does not have an interest if that cannot reasonably be regarded as likely to give rise to a conflict of interest at the time of his appointment as a director of that other company.

A director shall not vote (or be counted in the quorum at a meeting) in respect of any resolution concerning his own appointment (including fixing or varying its terms), or the termination of his own appointment, as the holder of any office or place of profit with the Company or any other company in which the Company is interested but, where proposals are under consideration concerning the appointment (including fixing or varying its terms), or the termination of the appointment, of two or more directors to offices or places of profit with the Company or any other company in which the Company is interested, those proposals may be divided and a separate resolution may be put in relation to each director and in that case each of the directors concerned (if not otherwise debarred from voting under the Articles of Association) shall be entitled to vote (and be counted in the quorum) in respect of each resolution unless it concerns his own appointment or the termination of his own appointment.

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A director shall also not vote (or be counted in the quorum at a meeting) in relation to any resolution relating to any transaction or arrangement with the Company in which he has an interest which may reasonably be regarded as likely to give rise to a conflict of interest and, if he purports to do so, his vote shall not be counted, but this prohibition shall not apply and a director may vote (and be counted in the quorum) in respect of any resolution concerning any one or more of the following matters:

• any transaction or arrangement in which he is interested by virtue of an interest in shares, debentures or other securities of the Company or otherwise in or through the Company;

• the giving of any guarantee, security or indemnity in respect of:

• money lent or obligations incurred by him or by any other person at the request of, or for the benefit of, the Company or any of its subsidiary undertakings; or

• a debt or obligation of the Company or any of its subsidiary undertakings for which he himself has assumed responsibility in whole or in part (either alone or jointly with others) under a guarantee or indemnity or by the giving of security;

• indemnification (including loans made in connection with it) by the Company in relation to the performance of his duties on behalf of the Company or of any of its subsidiary undertakings;

• any issue or offer of shares, debentures or other securities of the Company or any of its subsidiary undertakings in respect of which he is or may be entitled to participate in his capacity as a holder of any such securities or as an underwriter or sub underwriter;

• any transaction or arrangement concerning any other company in which he does not hold, directly or indirectly as shareholder, or through his direct or indirect holdings of financial instruments (within the meaning of Chapter 5 of the Disclosure Guidance and Transparency Rules of the United Kingdom Financial Conduct Authority) voting rights representing 1% or more of any class of shares in the capital of that company;

• any arrangement for the benefit of employees of the Company or any of its subsidiary undertakings which does not accord to him any privilege or benefit not generally accorded to the employees to whom the arrangement relates; and

• the purchase or maintenance of insurance for the benefit of directors or for the benefit of persons including directors.

If any question arises at any meeting as to whether an interest of a director (other than the chairman of the meeting) may reasonably be regarded as likely to give rise to a conflict of interest or as to the entitlement of any director (other than the chairman of the meeting) to vote in relation to a transaction or arrangement with the Company and the question is not resolved by his voluntarily agreeing to abstain from voting, the question shall be referred to the chairman of the meeting and his ruling in relation to the director concerned shall be final and conclusive except in a case where the nature or extent of the interest of the director concerned, so far as known to him, has not been fairly disclosed. If any question shall arise in respect of the chairman of the meeting and is not resolved by his voluntarily agreeing to abstain from voting, the question shall be decided by a resolution of the board of directors (for which purpose the chairman shall be counted in the quorum but shall not vote on the matter) and the resolution shall be final and conclusive except in a case where the nature or extent of the interest of the chairman of the meeting, so far as known to him, has not been fairly disclosed.

Directors’ Fees and Remuneration

The directors shall be paid such fees not exceeding in aggregate £1,055,000 per annum (or such larger sum as the Company may, by ordinary resolution, determine) as the board of directors may decide, to be divided among them in such proportion and manner as they may agree or, failing agreement, equally. Any such fee payable shall be distinct from any remuneration or other amounts payable to a director under other provisions of our Articles of Association and shall accrue from day to day.

The board of directors may grant special remuneration to any director who performs any special or extra services to or at the request of the Company.

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Such special remuneration may be paid by way of lump sum, salary, commission, participation in profits or otherwise as the board of directors may decide in addition to any remuneration payable under or pursuant to any other provision of our Articles of Association.

A director shall be paid out of the funds of the Company all travelling, hotel and other expenses properly incurred by him in and about the discharge of his duties, including his expenses of travelling to and from board meetings, committee meetings and general meetings. Subject to any guidelines and procedures established from time to time by the board of directors, a director may also be paid out of the funds of the Company all expenses incurred by him in obtaining professional advice in connection with the affairs of the Company or the discharge of his duties as a director.

The board of directors may exercise all the powers of the Company to:

• pay, provide, arrange or procure the grant of pensions or other retirement benefits, death, disability or sickness benefits, health, accident and other insurances or other such benefits, allowances, gratuities or insurances, including in relation to the termination of employment, to or for the benefit of any person who is or has been at any time a director of the Company or in the employment or service of the Company or of any body corporate which is or was associated with the Company or of the predecessors in business of the Company or any such associated body corporate, or the relatives or dependents of any such person. For that purpose, the board of directors may procure the establishment and maintenance of, or participation in, or contribution to, any pension fund, scheme or arrangement and the payment of any insurance premiums;

• establish, maintain, adopt and enable participation in any profit sharing or incentive scheme including shares, share options or cash or any similar schemes for the benefit of any director or employee of the Company or of any associated body corporate, and to lend money to any such director or employee or to trustees on their behalf to enable any such schemes to be established, maintained or adopted; and

• support and subscribe to any institution or association which may be for the benefit of the Company or of any associated body corporate or any directors or employees of the Company or associated body corporate or their relatives or dependents or connected with any town or place where the Company or an associated body corporate carries on business, and to support and subscribe to any charitable or public object whatsoever.

Borrowing Powers

The board of directors may exercise all the powers of the Company to borrow money, to guarantee, to indemnify, to mortgage or charge all or any part of its undertaking, property, assets (present and future) and uncalled capital, and to issue debentures and other securities, whether outright or as collateral security for any debt, liability or obligation of the Company or of any third party. There is no requirement on the directors to restrict the borrowing of the Company or any of its subsidiary undertakings.

Indemnity

As far as the Companies Act 2006 allows, the Company may:

(i)
indemnify any director of the Company (or of an associated body corporate) against any liability;

(ii)
indemnify a director of a company that is a trustee of an occupational pension scheme for employees (or former employees) of the Company (or of an associated body corporate) against liability incurred in connection with the company’s activities as trustee of the scheme;

(iii)
purchase and maintain insurance against any liability for any director referred to in paragraph (i) or (ii) above; and

(iv)
provide any director referred to in paragraphs (i) or (ii) above with funds (whether by loan or otherwise) to meet expenditure incurred or to be incurred by him in defending any criminal, regulatory or civil proceedings or in connection with an application for relief (or to enable any such director to avoid incurring such expenditure), the powers given by the Articles of Association shall not limit any general powers of the Company to grant indemnities, purchase and maintain insurance or provide funds (whether by way of loan or otherwise) to any person in connection with any legal or regulatory proceedings or applications for relief.

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Other UK Law Considerations

Notification of Voting Rights

A shareholder in a public company incorporated in the United Kingdom whose shares are admitted to the equity shares (commercial companies) category of the Official List of the United Kingdom Financial Conduct Authority and to trading on the Main Market of the LSE is required pursuant to Rule 5 of the Disclosure Guidance and Transparency Rules of the United Kingdom Financial Conduct Authority to notify us of the percentage of his voting rights if the percentage of voting rights that he holds as a shareholder or through his direct or indirect holding of financial instruments (or a combination of such holdings) reaches, exceeds or falls below 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10% and each 1% threshold thereafter up to 100% as a result of an acquisition or disposal of shares or financial instruments.

Mandatory Purchases and Acquisitions

Pursuant to Sections 979 to 991 of the Companies Act 2006, where a takeover offer has been made for us and the offeror has acquired or unconditionally contracted to acquire not less than 90% in value of the shares to which the offer relates and not less than 90% of the voting rights carried by those shares, the offeror may give notice to the holder of any shares to which the offer relates which the offeror has not acquired or unconditionally contracted to acquire that he wishes to acquire, and is entitled to so acquire, those shares on the same terms as the general offer. The offeror would do so by sending a notice to the outstanding minority shareholders telling them that it will compulsorily acquire their shares. Such notice must be sent within three months of the last day on which the offer can be accepted in the prescribed manner. The squeeze-out of the minority shareholders can be completed at the end of six weeks from the date the notice has been given, subject to the minority shareholders failing to successfully lodge an application to the court to prevent such squeeze-out any time prior to the end of those six weeks following which the offeror can execute a transfer of the outstanding shares in its favor and pay the consideration to us, which would hold the consideration on trust for the outstanding minority shareholders. The consideration offered to the outstanding minority shareholders whose shares are compulsorily acquired under the Companies Act 2006 must, in general, be the same as the consideration that was available under the takeover offer.

Sell Out

The Companies Act 2006 also gives our minority shareholders a right to be bought out in certain circumstances by an offeror who has made a takeover offer for all of our shares. The holder of shares to which the offer relates, and who has not otherwise accepted the offer, may require the offeror to acquire his shares if, prior to the expiry of the acceptance period for such offer, (i) the offeror has acquired or unconditionally agreed to acquire not less than 90% in value of the voting shares, and (ii) not less than 90% of the voting rights carried by those shares. The offeror may impose a time limit on the rights of minority shareholders to be bought out that is not less than three months after the end of the acceptance period. If a shareholder exercises his rights to be bought out, the offeror is required to acquire those shares on the terms of this offer or on such other terms as may be agreed.

Disclosure of Interest in Shares

Pursuant to Part 22 of the Companies Act 2006, we are empowered by notice in writing to any person whom we know or have reasonable cause to believe to be interested in our shares, or at any time during the three years immediately preceding the date on which the notice is issued has been so interested, within a reasonable time to disclose to us particulars of that person’s interest and (so far as is within his knowledge) particulars of any other interest that subsists or subsisted in those shares.

Under our Articles of Association, if a person defaults in supplying us with the required particulars in relation to the shares in question or the default shares within the prescribed period, the directors may by notice direct that:

• in respect of the default shares, the relevant shareholder shall not be entitled to attend or vote (either in person or by proxy) at any general meeting or of a general meeting of the holders of a class of shares or upon any poll or to exercise any right conferred by the default shares;

• where the default shares represent at least 0.25% of their class, (i) any dividend or other money payable in respect of the default shares shall be retained by us without liability to pay interest, and/or

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(ii) no transfers by the relevant shareholder of any default shares may be registered (unless the shareholder himself is not in default and the shareholder proves to the satisfaction of the board that no person in default as regards supplying such information is interested in any of the default shares); and/or

• any shares held by the relevant shareholder in uncertificated form shall be converted into certificated form and that shareholder shall not after that be entitled to convert all or any shares held by him into uncertificated form (unless the shareholder himself is not in default as regards supplying the information required and the shareholder proves to the satisfaction of the board that, after due and careful inquiry, the shareholder is satisfied that none of the shares he is proposing to convert into uncertificated form is a default share).

Purchase of Own Shares

Under UK law, a limited company may only purchase its own shares out of the distributable profits of the company or the proceeds of a fresh issue of shares made for the purpose of financing the purchase, provided that they are not restricted from doing so by their articles. A limited company may not purchase its own shares if, as a result of the purchase, there would no longer be any issued shares of the company other than redeemable shares or shares held as treasury shares. Shares must be fully paid in order to be repurchased.

Subject to the above, we may purchase our own shares in the manner prescribed below. We may make a market purchase of our own fully paid shares pursuant to an ordinary resolution of shareholders. The resolution authorizing the purchase must:

• specify the maximum number of shares authorized to be acquired;

• determine the maximum and minimum prices that may be paid for the shares; and

• specify a date, not being later than five years after the passing of the resolution, on which the authority to purchase is to expire.

We may purchase our own fully paid shares other than on a recognized investment exchange pursuant to a purchase contract authorized by resolution of shareholders before the purchase takes place. Any authority will not be effective if any shareholder from whom we propose to purchase shares votes on the resolution and the resolution would not have been passed if he had not done so. The resolution authorizing the purchase must specify a date, not being later than five years after the passing of the resolution, on which the authority to purchase is to expire.

Distributions and Dividends

Under the Companies Act 2006, before a company can lawfully make a distribution or dividend, it must ensure that it has sufficient distributable reserves (on a non-consolidated basis). The basic rule is that a company’s profits available for the purpose of making a distribution are its accumulated, realized profits, so far as not previously utilized by distribution or capitalization, less its accumulated, realized losses, so far as not previously written off in a reduction or reorganization of capital duly made. The requirement to have sufficient distributable reserves before a distribution or dividend can be paid applies to us and to each of our subsidiaries that has been incorporated under UK law.

It is not sufficient that we, as a public company, have made a distributable profit for the purpose of making a distribution. An additional capital maintenance requirement is imposed on us to ensure that the net worth of the company is at least equal to the amount of its capital. A public company can only make a distribution:

• if, at the time that the distribution is made, the amount of its net assets (that is, the total excess of assets over liabilities) is not less than the total of its called-up share capital and undistributable reserves; and

• if, and to the extent that, the distribution itself, at the time that it is made, does not reduce the amount of the net assets to less than that total.

City Code on Takeovers and Mergers

As a public company incorporated in the United Kingdom with our registered office in the United Kingdom and whose shares are admitted to the premium segment of the Official List of the United Kingdom Financial

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Conduct Authority and to trading on the Main Market of the LSE, we are subject to the UK City Code on Takeovers and Mergers (the “City Code”), which is issued and administered by the UK Panel on Takeovers and Mergers (the “Panel”). The City Code provides a framework within which takeovers of companies subject to it are conducted. In particular, the City Code contains certain rules in respect of mandatory offers. Under Rule 9 of the City Code, if a person:

• acquires an interest in our shares which, when taken together with shares in which he or persons acting in concert with him are interested, carries 30% or more of the voting rights of our shares; or

• who, together with persons acting in concert with him, is interested in shares that in the aggregate carry not less than 30% and not more than 50% of the voting rights of our shares, and such persons, or any person acting in concert with him, acquires additional interests in shares that increase the percentage of shares carrying voting rights in which that person is interested,

the acquirer and depending on the circumstances, its concert parties, would be required (except with the consent of the Panel) to make a cash offer for our outstanding shares at a price not less than the highest price paid for any interests in the shares by the acquirer or its concert parties during the previous 12 months.

Exchange Controls

There are no governmental laws, decrees, regulations or other legislation in the United Kingdom that may affect the import or export of capital, including the availability of cash and cash equivalents for use by us, or that may affect the remittance of dividends, interest or other payments by us to non-resident holders of our ordinary shares, other than withholding tax requirements. There is no limitation imposed by UK law or in our Articles of Association on the right of non-residents to hold or vote shares.

Differences in Corporate Law

The applicable provisions of the Companies Act 2006 differ from laws applicable to U.S. corporations and their shareholders. Set forth below is a summary of certain differences between the provisions of the Companies Act 2006 applicable to us and the General Corporation Law of the State of Delaware relating to shareholders’ rights and protections. This summary is not intended to be a complete discussion of the respective rights and it is qualified in its entirety by reference to Delaware law and UK law.

			United Kingdom			Delaware
Appointment and Number of Directors			Under the Companies Act 2006, a public limited company must have at least two directors, and the number of directors may be fixed by or in the manner provided in a company’s articles of association.			Under Delaware law, a corporation must have at least one director, and the number of directors shall be fixed by or in the manner provided in the by-laws.
Removal of Directors			Under the Companies Act 2006, shareholders may remove a director without cause by an ordinary resolution (which is passed by a simple majority of those voting in person or by proxy at a general meeting) irrespective of any provisions of any service contract the director has with the company, provided 28 clear days’ notice of the resolution has been given to the company and its shareholders. On receipt of notice of an intended resolution to remove a director, the company must forthwith send a copy of the notice to the			Under Delaware law, any director or the entire board of directors may be removed, with or without cause, by the holders of a majority of the shares then entitled to vote at an election of directors, except (i) unless the certificate of incorporation provides otherwise, in the case of a corporation whose board of directors is classified, stockholders may effect such removal only for cause; or (ii) in the case of a corporation having cumulative voting, if less than the entire board of directors is to be removed, no director may be removed without cause if the

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			director concerned. Certain other procedural requirements under the Companies Act 2006 must also be followed, such as allowing the director to make representations against his or her removal either at the meeting or in writing.			votes cast against his or her removal would be sufficient to elect him or her if then cumulatively voted at an election of the entire board of directors, or, if there are classes of directors, at an election of the class of directors of which he or she is a part.
Vacancies on the Board of Directors			Under UK law, the procedure by which directors, other than a company’s initial directors, are appointed is generally set out in a company’s articles of association, provided that where two or more persons are appointed as directors of a public limited company by resolution of the shareholders, resolutions appointing each director must be voted on individually.			Under Delaware law, vacancies and newly created directorships may be filled by a majority of the directors then in office (even though less than a quorum) or by a sole remaining director unless (i) otherwise provided in the certificate of incorporation or by-laws of the corporation or (ii) the certificate of incorporation directs that a particular class of stock is to elect such director, in which case a majority of the other directors elected by such class, or a sole remaining director elected by such class, will fill such vacancy.
Annual General Meeting			Under the Companies Act 2006, a public limited company must hold an annual general meeting in each six-month period following the company’s annual accounting reference date.			Under Delaware law, the annual meeting of stockholders shall be held at such place, on such date and at such time as may be designated from time to time by the board of directors or as provided in the certificate of incorporation or by the by-laws.
General Meeting			Under the Companies Act 2006, a general meeting of the shareholders of a public limited company may be called by the directors. Shareholders holding at least 5% of the paid-up capital of the company carrying voting rights at general meetings (excluding nay paid up capital held as treasury shares) can require the directors to call a general meeting, and, if the directors fail to do so within a certain period, may themselves convene a general meeting.			Under Delaware law, special meetings of the stockholders may be called by the board of directors or by such person or persons as may be authorized by the certificate of incorporation or by the by-laws.
Notice of General Meetings			Under the Companies Act 2006, 21 clear days’ notice must be given for an annual general meeting and any resolutions to be proposed at the meeting. Subject to a company’s articles of association providing for a			Under Delaware law, unless otherwise provided in the certificate of incorporation or by-laws, written notice of any meeting of the stockholders must be given to each stockholder entitled to vote at the

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			longer period, at least 14 clear days’ notice is required for any other general meeting. In addition, certain matters, such as the removal of directors or auditors, require special notice, which is 28 clear days’ notice. The shareholders of a company may in all cases consent to a shorter notice period, the proportion of shareholders’ consent required being 100% of those entitled to attend and vote in the case of an annual general meeting and, in the case of any other general meeting, a majority in number of the shareholders having a right to attend and vote at the meeting, being a majority who together hold not less than 95% in nominal value of the shares giving a right to attend and vote at the meeting.			meeting not less than ten nor more than 60 days before the date of the meeting and shall specify the place, date, hour, and purpose or purposes of the meeting.
Proxy			Under the Companies Act 2006, at any meeting of shareholders, a shareholder may designate another person to attend, speak and vote at the meeting on their behalf by proxy.			Under Delaware law, at any meeting of stockholders, a stockholder may designate another person to act for such stockholder by proxy, but no such proxy shall be voted or acted upon after three years from its date, unless the proxy provides for a longer period. A director of a Delaware corporation may not issue a proxy representing the director’s vote (written or verbal) via another board member.
Preemptive Rights			Under the Companies Act 2006, “equity securities,” being (i) shares in a company other than shares that, with respect to dividends and capital, carry a right to participate only up to a specified amount in a distribution (“ordinary shares”) or (ii) rights to subscribe for, or to convert securities into, ordinary shares, proposed to be allotted for cash must be offered first to the existing equity shareholders in the company in proportion to the respective nominal value of their holdings, unless an exception applies or a special resolution to the contrary has been passed by shareholders in a general meeting or the articles of association provide otherwise, in each case in accordance with the provisions of the Companies Act 2006.			Under Delaware law, stockholders have no preemptive rights to subscribe to additional issues of stock or to any security convertible into such stock unless, and except to the extent that, such rights are expressly provided for in the certificate of incorporation.

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			United Kingdom			Delaware
Authority to Allot			Under the Companies Act 2006, the directors of a company must not allot shares or grant rights to subscribe for or to convert any security into shares unless an exception applies or an ordinary resolution to the contrary has been passed by shareholders in a general meeting or the articles of association provide otherwise, in each case in accordance with the provisions of the Companies Act 2006.			Under Delaware law, if the corporation’s certificate of incorporation so provides, the board of directors has the power to authorize the issuance of stock. It may authorize capital stock to be issued for consideration consisting of cash, any tangible or intangible property or any benefit to the corporation or any combination thereof. It may determine the amount of such consideration by approving a formula. In the absence of actual fraud in the transaction, the judgment of the directors as to the value of such consideration is conclusive.
Liability of Directors and Officers			Under the Companies Act 2006, any provision, whether contained in a company’s articles of association or any contract or otherwise, that purports to exempt a director of a company, to any extent, from any liability that would otherwise attach to him or her in connection with any negligence, default, breach of duty or breach of trust in relation to the company is void. Any provision by which a company directly or indirectly provides an indemnity, to any extent, for a director of the company or of an associated company against any liability attaching to him or her in connection with any negligence, default, breach of duty or breach of trust in relation to the company of which he or she is a director is also void except as permitted by the Companies Act 2006, which provides exceptions for the company to (i) purchase and maintain insurance against such liability; (ii) provide a “qualifying third party indemnity” (being an indemnity against liability incurred by the director to a person other than the company or an associated company or for any criminal proceedings in which he is convicted); and (iii) provide a “qualifying pension scheme indemnity” (being an indemnity against liability incurred in connection with the company’s activities as trustee of an occupational pension plan).			Under Delaware law, a corporation’s certificate of incorporation may include a provision eliminating or limiting the personal liability of a director to the corporation and its stockholders for damages arising from a breach of fiduciary duty as a director. However, no provision can limit the liability of a director for:  •  any breach of the director’s duty of loyalty to the corporation or its stockholders;  •  acts or omissions not in good faith or that involve intentional misconduct or a knowing violation of law;  •  intentional or negligent payment of unlawful dividends or stock purchases or redemptions; or  •  any transaction from which the director derives an improper personal benefit.

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			United Kingdom			Delaware
Voting Rights			Under UK law, unless a poll is demanded by the shareholders of a company or is required by the chairman of the meeting or the company’s articles of association, shareholders shall vote on all resolutions on a show of hands. Under the Companies Act 2006, a poll may be demanded by (i) not fewer than five shareholders having the right to vote on the resolution; (ii) any shareholder(s) representing not less than 10% of the total voting rights of all the shareholders having the right to vote on the resolution (excluding any voting rights attaching to treasury shares); or (iii) any shareholder(s) holding shares in the company conferring a right to vote on the resolution (excluding any voting rights attaching to treasury shares) being shares on which an aggregate sum has been paid up equal to not less than 10% of the total sum paid up on all the shares conferring that right. A company’s articles of association may provide more extensive rights for shareholders to call a poll. Under UK law, an ordinary resolution is passed on a show of hands if it is approved by a simple majority (more than 50%) of the votes cast by shareholders present (in person or by proxy) and entitled to vote. If a poll is demanded, an ordinary resolution is passed if it is approved by holders representing a simple majority of the total voting rights of shareholders present, in person or by proxy, who, being entitled to vote, vote on the resolution. Special resolutions require the affirmative vote of not less than 75% of the votes cast by shareholders present, in person or by proxy, at the meeting and entitled to vote. If a poll is demanded, a special resolution is passed if it is approved by shareholders representing not less than 75% of the total voting rights of shareholders who, being entitled to vote, vote in person, by proxy or in advance.			Delaware law provides that, unless otherwise provided in the certificate of incorporation, each stockholder is entitled to one vote for each share of capital stock held by such stockholder.

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			United Kingdom			Delaware
Shareholder Vote on Certain Transactions			The Companies Act 2006 provides for schemes of arrangement, which are arrangements or compromises between a company and any class of shareholders or creditors and used in certain types of reconstructions, amalgamations, capital reorganizations or takeovers. These arrangements require:  •  the approval at a shareholders’ or creditors’ meeting convened by order of the court, of a majority in number of shareholders or creditors representing 75% in value of the capital held by, or debt owed to, the class of shareholders or creditors, or class thereof present and voting, either in person or by proxy; and  •  the approval of the court.			Generally, under Delaware law, unless the certificate of incorporation provides for the vote of a larger portion of the stock, completion of a merger, consolidation, sale, lease or exchange of all or substantially all of a corporation’s assets or dissolution requires:  •  the approval of the board of directors; and  •  approval by the vote of the holders of a majority of the outstanding stock or, if the certificate of incorporation provides for more or less than one vote per share, a majority of the votes of the outstanding stock of a corporation entitled to vote on the matter.
Standard of Conduct for Directors			Under UK law, a director owes various statutory and fiduciary duties to the company, including:  •  to act in the way he considers, in good faith, would be most likely to promote the success of the company for the benefit of its shareholders as a whole;  •  to avoid a situation in which he has, or can have, a direct or indirect interest that conflicts, or possibly conflicts, with the interests of the company;  •  to act in accordance with the company’s constitution and only exercise his powers for the purposes for which they are conferred;  •  to exercise independent judgment;  •  to exercise reasonable care, skill and diligence;  •  not to accept benefits from a third party conferred by reason of his being a director or doing,			Delaware law does not contain specific provisions setting forth the standard of conduct of a director. The scope of the fiduciary duties of directors is generally determined by the courts of the State of Delaware. In general, directors have a duty to act without self-interest, on a well-informed basis and in a manner they reasonably believe to be in the best interest of the stockholders. Directors of a Delaware corporation owe fiduciary duties of care and loyalty to the corporation and to its stockholders. The duty of care generally requires that a director act in good faith, with the care that an ordinarily prudent person would exercise under similar circumstances. Under this duty, a director must inform himself or herself of all material information reasonably available regarding a significant transaction. The duty of loyalty requires that a director act in a manner he or she reasonably believes to be in the best interests of the corporation. A director must not use his or her corporate position for personal gain or advantage. In general, but subject to certain exceptions, actions of a director

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			or not doing, anything as a director; and  •  a duty to declare any interest that he has, whether directly or indirectly, in a proposed or existing transaction or arrangement with the company.			are presumed to have been made on an informed basis, in good faith and in the honest belief that the action taken was in the best interests of the corporation. However, this presumption may be rebutted by evidence of a breach of one of the fiduciary duties. Delaware courts have also imposed a heightened standard of conduct upon directors of a Delaware corporation who take any action designed to defeat a threatened change in control of the corporation. In addition, under Delaware law, when the board of directors of a Delaware corporation approves the sale or break-up of a corporation, the board of directors may, in certain circumstances, have a duty to obtain the highest value reasonably available to the stockholders.
Shareholder Actions			Under UK law, generally, the company, rather than its shareholders, is the proper claimant in an action in respect of a wrong done to the company or where there is an irregularity in the company’s internal management. Notwithstanding this general position, the Companies Act 2006 provides that (i) a court may allow a shareholder to bring a derivative claim (that is, an action in respect of and on behalf of the company) in respect of a cause of action arising from a director’s negligence, default, breach of duty or breach of trust and (ii) a shareholder may bring a claim for a court order where the company’s affairs have been or are being conducted in a manner that is unfairly prejudicial to some of its shareholders generally or of some of its shareholders, or that an actual or proposed act or omission of the company is or would be so prejudicial.			Under Delaware law, a stockholder may initiate a derivative action to enforce a right of a corporation if the corporation fails to enforce the right itself. The complaint must:  •  state that the plaintiff was a stockholder at the time of the transaction of which the plaintiff complains or that the plaintiff’s shares thereafter devolved on the plaintiff by operation of law; and  •  either (i) allege with particularity the efforts made by the plaintiff to obtain the action the plaintiff desires from the directors and the reasons for the plaintiff’s failure to obtain the action; or (ii) state the reasons for not making the effort. Additionally, the plaintiff must remain a stockholder through the duration of the derivative suit. The action will not be dismissed or compromised without the approval of the Delaware Court of Chancery.

Listing

Our ordinary shares trade on the NYSE under the symbol “DEC.” Our ordinary shares are also admitted to listing on the Official List of the United Kingdom Financial Conduct Authority and are admitted to trading on the Main Market of the LSE under the symbol “DEC.”

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MATERIAL TAX CONSEQUENCES

The following summary contains a description of certain United Kingdom and U.S. federal income tax consequences of the acquisition, ownership and disposition of ordinary shares, but it does not purport to be a comprehensive description of all the tax consequences that may be relevant to a decision to purchase ordinary shares. The summary is based upon the tax laws of the United Kingdom and regulations thereunder and on the tax laws of the United States and regulations thereunder as of the date hereof, which are subject to change.

Material United Kingdom Tax Consequences

The following statements are of a general nature and do not purport to be a complete analysis of all potential UK tax consequences of acquiring, holding and disposing of the ordinary shares. They are based on current UK tax law and on the current published practice of Her Majesty’s Revenue and Customs (“HMRC”) (which may not be binding on HMRC), as of the date of this prospectus, all of which are subject to change, possibly with retrospective effect. They are intended to address only certain UK tax consequences for holders of ordinary shares who are tax resident in (and only in) the United Kingdom, and in the case of individuals, domiciled in (and only in) the United Kingdom (except where expressly stated otherwise) who are the absolute beneficial owners of the ordinary shares and any dividends paid on them and who hold the ordinary shares as investments (other than in an individual savings account or a self-invested personal pension), and who currently hold their ordinary shares within the system of DTC. They do not address the UK tax consequences which may be relevant to certain classes of shareholders such as traders, brokers, dealers, banks, financial institutions, insurance companies, investment companies, collective investment schemes, tax-exempt organizations, trustees, persons connected with the Company, persons holding their ordinary shares as part of hedging or conversion transactions, shareholders who have (or are deemed to have) acquired their ordinary shares by virtue of an office or employment, and shareholders who are or have been officers or employees of the Company. The statements do not apply to any shareholder who either directly or indirectly holds or controls 10% or more of the Company’s share capital (or class thereof), voting power or profits.

The following is intended only as a general guide and is not intended to be, nor should it be considered to be, legal or tax advice to any particular prospective subscriber for, or purchaser of, any ordinary shares. Accordingly, prospective subscribers for, or purchasers of, any ordinary shares who are in any doubt as to their tax position regarding the acquisition, ownership or disposition of any ordinary shares or who are subject to tax in a jurisdiction other than the United Kingdom should consult their own tax advisers.

UK taxation of dividends

Withholding tax

The Company will not be required to withhold UK tax at source when paying dividends. The amount of any liability to UK tax on dividends paid by the Company will depend on the individual circumstances of a shareholder.

Individual shareholders

An individual shareholder who is resident for tax purposes in the United Kingdom may, depending on his or her particular circumstances, be subject to UK tax on dividends received from the Company. An individual shareholder who is not resident for tax purposes in the United Kingdom should not be chargeable to UK income tax on dividends received from the Company unless he or she carries on (whether solely or in partnership) any trade, profession or vocation in the United Kingdom through a branch or agency to which the ordinary shares are attributable. There are certain exceptions for trading in the United Kingdom through independent agents, such as some brokers and investment managers.

All dividends received by a UK tax resident individual holder of any ordinary shares from the Company or from other sources will form part of the shareholder’s total income for income tax purposes and will constitute the top slice of that income. A nil rate of income tax will apply to the first £500 (for tax year 2024/2025) of taxable dividend income received by the shareholder in a tax year (the “dividend allowance”). Income within the dividend allowance will be taken into account in determining whether income in excess of the dividend allowance falls within the basic rate, higher rate or additional rate tax bands. Dividend income in excess of the dividend allowance will be taxed at 8.75% to the extent that the excess amount falls within the basic rate tax band, 33.75% to the extent that the excess amount falls within the higher rate tax band and 39.35% to the extent that the excess amount falls within the additional rate tax band.

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Any U.S. federal withholding tax withheld from the dividend, should, to the extent that such U.S. federal withholding tax does not exceed the withholdable amount assuming that the relevant individual UK shareholder has correctly furnished a valid IRS Form W-8BEN (expected to be 15% of the dividend amount if such individual UK shareholder qualifies for the lower treaty rate under the U.S. - UK double tax treaty), be able to credit the U.S. federal withholding tax against their UK income tax liability on the dividend. Accordingly, for an individual UK shareholder paying income tax on the dividend at the higher or additional dividend tax rates, their overall effective tax charge should equal their UK income tax liability. For other individual UK shareholders, the amount withheld on account of U.S. federal withholding tax may exceed their UK income tax liability, in which case their overall effective charge will be equal to the U.S. tax withheld.

Corporate shareholders

Corporate shareholders which are resident for tax purposes in the United Kingdom should not be subject to UK corporation tax on any dividend received from the Company so long as the dividends qualify for exemption (as is likely) and certain conditions are met (including anti-avoidance conditions). If the conditions for exemption are not met or cease to be satisfied, or such a shareholder elects for an otherwise exempt dividend to be taxable, the shareholder will be subject to UK corporation tax on dividends received from the Company, at the rate of corporation tax applicable to that shareholder (the main rate of UK corporation tax is currently 25% for financial year 2024/2025).

Corporate shareholders who are not resident in the United Kingdom will not generally be subject to UK corporation tax on dividends unless they are carrying on a trade, profession or vocation in the United Kingdom through a permanent establishment in connection with which the ordinary shares are used, held, or acquired.

A shareholder who is resident outside the United Kingdom may be subject to non-UK taxation on dividend income under local law.

UK taxation of capital gains

UK resident shareholders

A disposal or deemed disposal of ordinary shares by an individual or corporate shareholder who is tax resident in the United Kingdom may, depending on the shareholder’s circumstances and subject to any available exemptions or reliefs, give rise to a chargeable gain or allowable loss for the purposes of UK taxation of chargeable gains.

Any chargeable gain (or allowable loss) will generally be calculated by reference to the consideration received for the disposal of the ordinary shares less the allowable cost to the shareholder of acquiring any such ordinary shares.

The applicable tax rates for individual shareholders realizing a gain on the disposal of ordinary shares is, broadly, 10% for basic rate taxpayers and 20% for higher and additional rate taxpayers. For corporate shareholders, corporation tax is generally charged on chargeable gains at the rate applicable to the relevant corporate shareholder (the main rate of UK corporation tax is currently 25% for financial year 2024/2025).

Non-UK shareholders

Shareholders who are not resident in the United Kingdom and, in the case of an individual shareholder, not temporarily non-resident, should not be liable for UK tax on capital gains realized on a sale or other disposal of ordinary shares unless (i) such ordinary shares are used, held or acquired for the purposes of a trade, profession or vocation carried on in the United Kingdom through a branch or agency or, in the case of a corporate shareholder, through a permanent establishment or (ii) where certain conditions are met, the Company derives 75% or more of its gross value from UK land. Shareholders who are not resident in the United Kingdom may be subject to non-UK taxation on any gain under local law.

Generally, an individual shareholder who has ceased to be resident in the United Kingdom for UK tax purposes for a period of five years or less and who disposes of any ordinary shares during that period may be liable on their return to the United Kingdom to UK taxation on any capital gain realized (subject to any available exemption or relief).

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UK stamp duty (“stamp duty”) and UK stamp duty reserve tax (“SDRT”)

The statements in this paragraph are intended as a general guide to the current position relating to stamp duty and SDRT and apply to any shareholder irrespective of their place of tax residence. Certain categories of person, including intermediaries, brokers, dealers and persons connected with depositary receipt arrangements and clearance services, may not be liable to stamp duty or SDRT or may be liable at a higher rate or may, although not primarily liable for the tax, be required to notify and account for it under the UK Stamp Duty Reserve Tax Regulations 1986.

The following statements apply only to ordinary shares that are registered on the main share register in the United Kingdom. For the avoidance of doubt, the position in relation to ordinary shares that are registered on any overseas branch share register or held through a depositary system or clearance service is not considered other than to the extent expressly set out below. Prospective investors who are in any doubt about their tax position are strongly recommended to consult their own professional advisers.

Issue of shares

As a general rule (and except in relation to depositary receipt systems and clearance services (as to which see below)), no UK stamp duty or SDRT is payable on the issue of the ordinary shares.

Clearance systems and depositary receipt issuers

Transfers of our ordinary shares to, or to a nominee or agent for, a person whose business is or includes issuing depositary receipts or to, or to a nominee or agent for, a person whose business is or includes the provision of clearance services, will generally be subject to stamp duty or SDRT at 1.5% of the amount or value of the consideration or, in certain circumstances, the value of the ordinary shares transferred unless, in the context of a clearance service, the clearance service has made and maintained an election under section 97A of the UK Finance Act 1986, or a “section 97A election.” It is understood that HMRC regards the facilities of DTC as a clearance service for these purposes and we are not aware of any section 97A election having been made by DTC. In practice, any liability for stamp duty or SDRT is in general borne by such person depositing the relevant shares in the depositary receipt system or clearance service. UK stamp duty and SDRT will not, however, arise on a transfer of our ordinary shares to a depositary receipt issuer or to a clearance service to the extent that such transfer is an “exempt capital-raising transfer” or an “exempt listing transfer,” as defined in Finance Act 2024.

Transfer of shares

No SDRT should be required to be paid on a paperless transfer of ordinary shares through the clearance service facilities of DTC, provided that no section 97A election has been made by DTC, and such ordinary shares are held through DTC at the time of any agreement for their transfer.

No UK stamp duty will in practice be payable on a written instrument transferring an ordinary share provided that the instrument of transfer is executed and remains at all times outside the United Kingdom. Where these conditions are not met, the transfer of, or agreement to transfer, an ordinary share could, depending on the circumstances, attract a charge to UK stamp duty at the rate of 0.5% of the amount or value of the consideration. If it is necessary to pay stamp duty, it may also be necessary to pay interest and penalties.

Material United States Federal Income Tax Consequences

The following discussion is a summary of the material U.S. federal income tax consequences to U.S. Holders and Non-U.S. Holders (each, as defined below) of the purchase, ownership and disposition of an ordinary share issued pursuant to this offering, but does not purport to be a complete analysis of all potential U.S. federal tax consequences. The consequences of other U.S. federal tax laws, such as estate and gift tax laws, and any applicable state, local, or non-U.S. tax laws are not discussed herein. This discussion is based on the U.S. Internal Revenue Code of 1986, as amended (the “Code”), Treasury Regulations promulgated thereunder, judicial decisions and administrative interpretations of the U.S. Internal Revenue Service (the “IRS”), in each case in effect as of the date hereof. These authorities may change or be subject to differing interpretations. Any such change or differing interpretation may be applied retroactively in a manner that could adversely affect a holder of an ordinary share. We have not sought and will not seek any rulings from the IRS regarding the matters discussed below. There can be no assurance that the IRS or a court will not take a contrary position to the description below of the tax consequences of the purchase, ownership and disposition of our ordinary shares.

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This discussion is limited to U.S. Holders and Non-U.S. Holders that each hold an ordinary share as a “capital asset” within the meaning of Section 1221 of the Code (generally, property held for investment). This discussion does not address all U.S. federal income tax consequences relevant to a holder’s particular circumstances, including the impact of the Medicare contribution tax on net investment income and the alternative minimum tax. In addition, it does not address consequences relevant to holders subject to special rules, including, without limitation:

• U.S. expatriates and former citizens or long-term residents of the United States;

• U.S. Holders whose functional currency is not the U.S. dollar;

• persons holding an ordinary share as part of a hedge, straddle or other risk reduction strategy or as part of a conversion transaction or other integrated investment;

• banks, insurance companies, regulated investment companies, mutual funds and other financial institutions;

• brokers, dealers or traders in securities;

• “controlled foreign corporations,” “passive foreign investment companies,” and corporations that accumulate earnings to avoid U.S. federal income tax;

• partnerships or other entities or arrangements treated as partnerships for U.S. federal income tax purposes and other pass-through entities (and investors therein);

• tax-exempt organizations or governmental organizations;

• persons deemed to sell an ordinary share under the constructive sale provisions of the Code;

• persons who hold or receive an ordinary share pursuant to the exercise of any employee stock option or otherwise as compensation;

• tax-qualified retirement plans;

• “qualified foreign pension funds” as defined in Section 897(l)(2) of the Code and entities of all the interests of which are held by qualified foreign pension funds; and

• Non-U.S. Holders who will own directly, indirectly or constructively more than 5% of our ordinary shares.

If an entity or arrangement treated as a partnership for U.S. federal income tax purposes holds an ordinary share, the tax treatment of a partner in the partnership will depend on the status of the partner, the activities of the partnership and certain determinations made at the partner level. Accordingly, partnerships holding an ordinary share and the partners in such partnerships should consult their tax advisors regarding the U.S. federal income tax consequences to them.

THIS DISCUSSION IS FOR INFORMATIONAL PURPOSES ONLY AND IS NOT TAX ADVICE. PROSPECTIVE INVESTORS SHOULD CONSULT THEIR TAX ADVISORS WITH RESPECT TO THE APPLICATION OF THE U.S. FEDERAL INCOME TAX LAWS TO THEIR PARTICULAR SITUATIONS AS WELL AS ANY TAX CONSEQUENCES OF THE PURCHASE, OWNERSHIP AND DISPOSITION OF AN ORDINARY SHARE ARISING UNDER THE U.S. FEDERAL ESTATE OR GIFT TAX LAWS OR UNDER THE LAWS OF ANY STATE, LOCAL OR NON-U.S. TAXING JURISDICTION OR UNDER ANY APPLICABLE INCOME TAX TREATY.

U.S. Tax Status of Diversified Energy

Pursuant to Section 7874 of the Code, we believe we are and will continue to be treated as a U.S. corporation for all purposes under the Code. As such, the Company is subject to U.S. federal income tax on its worldwide taxable income (regardless of whether such income is “U.S. source” or “foreign source”) and is required to file a U.S. federal income tax return annually with the IRS. The Company is also subject to income tax in the United Kingdom. It is unclear how the foreign tax credit rules under the Code will operate in certain circumstances, given the treatment of the Company as a U.S. corporation for U.S. federal income tax purposes and the taxation of the Company in the United Kingdom. Accordingly, it is possible that the Company will be subject to double taxation with respect to all or part of its taxable income.

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Since we will be treated as a U.S. corporation for all purposes under the Code, we will not be treated as a “passive foreign investment company,” as such rules apply only to non-U.S. corporations for U.S. federal income tax purposes.

U.S. Holders

For purposes of this discussion, a “U.S. Holder” is any beneficial owner of an ordinary share that, for U.S. federal income tax purposes, is or is treated as any of the following:

• an individual who is a citizen or resident of the United States;

• a corporation created or organized under the laws of the United States, any state thereof, or the District of Columbia;

• an estate, the income of which is subject to U.S. federal income tax regardless of its source; or

• a trust that (1) is subject to the primary supervision of a U.S. court and the control of one or more “United States persons” (within the meaning of Section 7701(a)(30) of the Code), or (2) has a valid election in effect to be treated as a United States person for U.S. federal income tax purposes.

Distributions

Distributions, if any, made on the ordinary shares, generally will be included in a U.S. Holder’s income as ordinary dividend income to the extent of the Company’s current or accumulated earnings and profits. Distributions in excess of the Company’s current and accumulated earnings and profits will be treated as a tax-free return of capital to the extent of a U.S. Holder’s tax basis in the ordinary shares and thereafter as capital gain from the sale or exchange of such ordinary shares. Dividends received by a corporate U.S. Holder may be eligible for a dividends-received deduction, subject to applicable limitations. Dividends received by certain non-corporate U.S. Holders (including individuals) are generally taxed at the lower applicable long-term capital gains rates, provided certain holding period and other requirements are satisfied.

Sales, Certain Redemptions or Other Taxable Dispositions of Ordinary Shares

Upon the sale, certain redemptions or other taxable dispositions of an ordinary share, a U.S. Holder generally will recognize gain or loss equal to the difference between the amount realized and the U.S. Holder’s tax basis in the ordinary shares. Any gain or loss recognized on a taxable disposition of an ordinary share will be capital gain or loss. Such capital gain or loss will be long-term capital gain or loss if a U.S. Holder’s holding period at the time of the sale, redemption or other taxable disposition of the ordinary shares is longer than one year. Long-term capital gains recognized by certain non-corporate U.S. Holders (including individuals) are generally subject to a reduced rate of U.S. federal income tax. The deductibility of capital losses is subject to limitations.

Foreign Tax Credit Limitations

As discussed above under “Material United Kingdom Tax Consequences,” a U.S. Holder may be subject to UK tax with respect to its ordinary shares in certain circumstances (e.g., if (i) such ordinary shares are used, held or acquired for the purposes of a trade, profession or vocation carried on in the United Kingdom through a branch or agency or, in the case of a corporate shareholder, through a permanent establishment or (ii) where certain conditions are met, the Company derives 75% or more of its gross value from UK land). For U.S. federal income tax purposes, a U.S. Holder may elect for any taxable year to receive either a credit or a deduction for all foreign income taxes paid by the holder during the year. Complex limitations apply to the foreign tax credit, including a general limitation that the credit cannot exceed the proportionate share of a taxpayer’s U.S. federal income tax that the taxpayer’s foreign source taxable income bears to the taxpayer’s worldwide taxable income. In applying this limitation, items of income and deduction must be classified, under complex rules, as either U.S. source or foreign source. The status of the Company as a U.S. corporation for U.S. federal income tax purposes will cause dividends paid by the Company to be treated as U.S. source rather than foreign source income for this purpose. As a result, by virtue of the U.S. source character of a dividend paid by the Company and the foreign tax credit limitation, a foreign tax credit may be unavailable for any UK tax paid on distributions received from the Company. Similarly, to the extent a sale, redemption or other disposition of our ordinary shares by a U.S. Holder results in UK tax payable by the U.S. Holder, a foreign tax credit may

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be unavailable to the U.S. Holder for such UK tax. In each case, however, the U.S. Holder should be able to take a deduction for the U.S. Holder’s UK tax paid, provided that the U.S. Holder has not elected to credit other foreign taxes during the same taxable year. The foreign tax credit rules are complex, and their application in connection with Section 7874 of the Code in the presence of the United States-United Kingdom income tax treaty is not entirely clear. Each U.S. Holder should consult its tax advisor regarding these rules.

Foreign Currency

The amount of any distributions paid to a U.S. Holder in foreign currency, or the amount of proceeds paid in foreign currency on the sale, redemption or other disposition of our ordinary shares, generally will be equal to the U.S. dollar value of such foreign currency based on the exchange rate applicable on the date of receipt (regardless of whether such foreign currency is converted into U.S. dollars at that time). A U.S. Holder will have a basis in the foreign currency equal to its U.S. dollar value on the date of receipt. Any U.S. Holder that converts or otherwise disposes of the foreign currency after the date of receipt may have a foreign currency exchange gain or loss that would be treated as ordinary income or loss, and generally will be U.S. source income or loss for foreign tax credit purposes. Different rules apply to U.S. Holders that use the accrual method of tax accounting. A U.S. Holder that recognizes foreign currency exchange loss with respect to our ordinary shares would be required to report the loss on IRS Form 8886 (Reportable Transaction Disclosure Statement) if the loss exceeds the thresholds set forth in the applicable Treasury Regulations. For individuals and trusts, this loss threshold is $50,000 in any single year. For other types of taxpayers, the thresholds are higher. U.S. Holders should consult their tax advisors regarding the rules concerning foreign currency exchange gain or loss.

Non-U.S. Holders

For purposes of this discussion, a “Non-U.S. Holder” is any beneficial owner of an ordinary share that is neither a U.S. Holder nor an entity or arrangement treated as a partnership for U.S. federal income tax purposes.

Distributions

If the Company makes distributions of cash or property on the ordinary shares, such distributions will constitute dividends for U.S. federal income tax purposes to the extent paid from the Company’s current or accumulated earnings and profits, as determined under U.S. federal income tax principles. Amounts not treated as dividends for U.S. federal income tax purposes will constitute a return of capital and first be applied against and reduce a Non-U.S. Holder’s adjusted tax basis in its ordinary shares, but not below zero. Generally, a distribution that constitutes a return of capital will be subject to U.S. federal withholding tax at a rate of 15% if the Non-U.S. Holders’ ordinary shares constitute a USRPI (as defined below). However, we may elect to withhold at a rate of up to 30% of the entire amount of the distribution, even if the Non-U.S. Holders’ ordinary shares do not constitute a USRPI. For additional information regarding when a Non-U.S. Holder may treat its ownership of the ordinary shares as not constituting a USRPI, see below under the subsection titled “—Sale or Other Taxable Disposition.” However, because a Non-U.S. Holder would not have any U.S. federal income tax liability with respect to a return of capital distribution, a Non-U.S. Holder would be entitled to request a refund of any U.S. federal income tax that is withheld from a return of capital distribution (generally by timely filing a U.S. federal income tax return for the taxable year in which the tax was withheld). Any excess will be treated as capital gain and will be treated as described below under the subsection titled “—Sale or Other Taxable Disposition.”

Subject to the discussion below on effectively connected income, dividends paid to a Non-U.S. Holder of an ordinary share will be subject to U.S. federal withholding tax at a rate of 30% of the gross amount of the dividends (or such lower rate specified by an applicable income tax treaty, provided the Non-U.S. Holder furnishes a valid IRS Form W-8BEN or W-8BEN-E (or other applicable documentation) certifying qualification for a lower treaty rate). A Non-U.S. Holder that does not timely furnish the required documentation, but that qualifies for a reduced treaty rate, may obtain a refund of any excess amounts withheld by timely filing an appropriate claim for refund with the IRS. Non-U.S. Holders should consult their tax advisors regarding their entitlement to benefits under any applicable income tax treaty.

If dividends paid to a Non-U.S. Holder are effectively connected with the Non-U.S. Holder’s conduct of a trade or business within the United States (and, if required by an applicable income tax treaty, the Non-U.S. Holder maintains a permanent establishment in the United States to which such dividends are

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attributable), the Non-U.S. Holder will be exempt from the U.S. federal withholding tax described above. To claim the exemption, the Non-U.S. Holder must furnish to the applicable withholding agent a valid IRS Form W-8ECI, certifying that the dividends are effectively connected with the Non-U.S. Holder’s conduct of a trade or business within the United States.

Any such effectively connected dividends will be subject to U.S. federal income tax on a net income basis at the regular rates. A Non-U.S. Holder that is a corporation also may be subject to a branch profits tax at a rate of 30% (or such lower rate specified by an applicable income tax treaty) on such effectively connected dividends, as adjusted for certain items. Non-U.S. Holders should consult their tax advisors regarding any applicable tax treaties that may provide for different rules.

Sale or Other Taxable Disposition

Subject to the discussion below on information reporting, backup withholding and FATCA (as defined below), a Non-U.S. Holder will not be subject to U.S. federal income tax on any gain realized upon the sale or other taxable disposition of an ordinary share unless:

• the gain is effectively connected with the Non-U.S. Holder’s conduct of a trade or business within the United States (and, if required by an applicable income tax treaty, the Non-U.S. Holder maintains a permanent establishment in the United States to which such gain is attributable);

• the Non-U.S. Holder is a nonresident alien individual present in the United States for 183 days or more during the taxable year of the disposition and certain other requirements are met; or

• our ordinary shares constitute a U.S. real property interest (“USRPI”) because we are (or have been during the shorter of the five-year period ending on the date of the disposition or the Non-U.S. Holder’s holding period)a U.S. real property holding corporation (“USRPHC”) for U.S. federal income tax purposes.

Gain described in the first bullet point above generally will be subject to U.S. federal income tax on a net income basis at the regular rates. A Non-U.S. Holder that is a corporation also may be subject to a branch profits tax at a rate of 30% (or such lower rate specified by an applicable income tax treaty) on such effectively connected gain, as adjusted for certain items.

A Non-U.S. Holder described in the second bullet point above will be subject to U.S. federal income tax at a rate of 30% (or such lower rate specified by an applicable income tax treaty) on gain realized upon the sale or other taxable disposition of our ordinary shares, which may be offset by U.S. source capital losses of the Non-U.S. Holder (even though the individual is not considered a resident of the United States), provided the Non-U.S. Holder has timely filed U.S. federal income tax returns with respect to such losses.

With respect to the third bullet point above, due to the nature of our assets and operations, the Company believes it is (and will continue to be) a USRPHC under the Code and the ordinary shares constitute (and will continue to constitute) a USRPI. Non-U.S. Holders generally are subject to a 15% withholding tax on the amount realized from a sale or other taxable disposition of a USRPI, such as the ordinary shares, which is required to be collected from any sale or disposition proceeds. Furthermore, such Non-U.S. Holders are subject to U.S. federal income tax (at the regular rates) in respect of any gain on their sale or disposition of the ordinary shares and are required to file a U.S. tax return to report such gain and pay any tax liability that is not satisfied by withholding. Any gain should be determined in U.S. dollars, based on the excess, if any, of the U.S. dollar value of the consideration received over the Non-U.S. Holder’s tax basis in the ordinary shares determined in U.S. dollars under the rules applicable to Non-U.S. Holders. A Non-U.S. Holder may, by filing a U.S. tax return, be able to claim a refund for any withholding tax deducted in excess of the tax liability on any gain. However, if the ordinary shares are considered “regularly traded on an established securities market” (within the meaning of the Treasury Regulations), then Non-U.S. Holders will not be subject to the 15% withholding tax on the disposition of their ordinary shares, even if such ordinary shares constitute USRPIs. Moreover, if the ordinary shares are considered “regularly traded on an established securities market” (within the meaning of the Treasury Regulations) and the Non-U.S. Holder actually or constructively owns or owned, at all times during the shorter of the five-year period ending on the date of the disposition or the Non-U.S. Holder’s holding period, 5% or less of the ordinary shares taking into account applicable constructive ownership rules, such Non-U.S. Holder may treat its ownership of the ordinary shares as not constituting a USRPI and will not be subject to U.S. federal income tax on any gain realized upon the sale or other taxable disposition of the ordinary shares or

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U.S. tax return filing requirements. The Company expects the ordinary shares to be treated as “regularly traded on an established securities market” (within the meaning of the Treasury Regulations) so long as the ordinary shares are listed on the NYSE and regularly quoted by brokers or dealers making a market in such ordinary shares.

Non-U.S. Holders should consult their tax advisors regarding tax consequences of our treatment as a USRPHC and regarding potentially applicable income tax treaties that may provide for different rules.

Information Reporting and Backup Withholding

U.S. Holders

Information reporting requirements generally will apply to payments of distributions on the ordinary shares and the proceeds of a sale of an ordinary share paid to a U.S. Holder unless the U.S. Holder is an exempt recipient and, if requested, certifies as to that status. Backup withholding generally will apply to those payments if the U.S. Holder fails to provide an appropriate certification with its correct taxpayer identification number or certification of exempt status. Any amounts withheld under the backup withholding rules will be allowed as a refund or credit against a U.S. Holder’s U.S. federal income tax liability, provided the required information is timely furnished to the IRS.

Non-U.S. Holders

Payments of dividends on the ordinary shares will not be subject to backup withholding, provided the applicable withholding agent does not have actual knowledge or reason to know the Non-U.S. Holder is a United States person and the Non-U.S. Holder either certifies its non-U.S. status, such as by furnishing a valid IRS Form W-8BEN, W-8BEN-E or W-8ECI, or otherwise establishes an exemption. However, information returns are required to be filed with the IRS in connection with any distributions on our ordinary shares paid to the Non-U.S. Holder, regardless of whether such distributions constitute dividends or whether any tax was actually withheld. In addition, proceeds of the sale or other taxable disposition of our ordinary shares within the United States or conducted through certain U.S.-related brokers generally will not be subject to backup withholding or information reporting if the applicable withholding agent receives the certification described above and does not have actual knowledge or reason to know that such holder is a United States person or the holder otherwise establishes an exemption. Proceeds of a disposition of our ordinary shares conducted through a non-U.S. office of a non-U.S. broker generally will not be subject to backup withholding or information reporting.

Copies of information returns that are filed with the IRS may also be made available under the provisions of an applicable treaty or agreement to the tax authorities of the country in which the Non-U.S. Holder resides or is established.

Backup withholding is not an additional tax. Any amounts withheld under the backup withholding rules may be allowed as a refund or a credit against a Non-U.S. Holder’s U.S. federal income tax liability, provided the required information is timely furnished to the IRS.

Additional Withholding Tax on Payments Made to Foreign Accounts

Withholding taxes may be imposed under Sections 1471 to 1474 of the Code (such Sections commonly referred to as the Foreign Account Tax Compliance Act, or “FATCA”) on certain types of payments made to non-U.S. financial institutions and certain other non-U.S. entities. Specifically, a 30% withholding tax may be imposed on dividends on, or (subject to the proposed Treasury Regulations discussed below) gross proceeds from the sale or other disposition of, our ordinary shares paid to a “foreign financial institution” or a “non-financial foreign entity” (each as defined in the Code), unless (1) the foreign financial institution undertakes certain diligence and reporting obligations, (2) the non-financial foreign entity either certifies it does not have any “substantial United States owners” (as defined in the Code) or furnishes identifying information regarding each substantial United States owner, or (3) the foreign financial institution or non-financial foreign entity otherwise qualifies for an exemption from these rules. If the payee is a foreign financial institution and is subject to the diligence and reporting requirements in (1) above, it must enter into an agreement with the U.S. Department of the Treasury requiring, among other things, that it undertake to identify accounts held by certain “specified United States persons” or “United States owned foreign entities” (each as defined in the

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Code), annually report certain information about such accounts and withhold 30% on certain payments to non-compliant foreign financial institutions and certain other account holders. Foreign financial institutions located in jurisdictions that have an intergovernmental agreement with the United States governing FATCA may be subject to different rules.

Under the applicable Treasury Regulations and administrative guidance, withholding under FATCA generally applies to payments of dividends on our ordinary shares. While withholding under FATCA would have applied also to payments of gross proceeds from the sale or other disposition of stock, including our ordinary shares, proposed Treasury Regulations eliminate FATCA withholding on payments of gross proceeds entirely. Taxpayers generally may rely on these proposed Treasury Regulations until final Treasury Regulations are issued.

Prospective investors should consult their tax advisors regarding the potential application of withholding under FATCA to their investment in our ordinary shares.

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PLAN OF DISTRIBUTION

We are registering the ordinary shares held by the selling shareholders from time to time after the date of this prospectus. We will not receive any of the proceeds from the sale by the selling shareholders of our ordinary shares.

The term “selling shareholders” includes donees, pledgees, transferees or other successors in interest selling securities received after the date of this prospectus from a selling shareholder as a gift, pledge, partnership distribution or other transfer. The selling shareholders will act independently of us in making decisions with respect to the timing, manner and size of each sale. Such sales may be made on the principal trading market for our ordinary shares or any other stock exchange, market or trading facility on which our ordinary shares are traded or in private transactions. These sales may be at fixed or negotiated prices.

The selling shareholders may use any one or more of the following methods when selling securities:

• ordinary brokerage transactions and transactions in which the broker dealer solicits purchasers;

• one or more underwritten offerings;

• block trades in which the broker dealer will attempt to sell the ordinary shares as agent but may position and resell a portion of the block as principal to facilitate the transaction;

• purchases by a broker dealer as principal and resale by the broker dealer for its account;

• an exchange distribution in accordance with the rules of the applicable exchange;

• privately negotiated transactions;

• settlement of short sales;

• distribution to employees, members, partners or stockholders of the selling shareholders;

• transactions through broker dealers that agree with the selling shareholders to sell a specified number of such ordinary shares at a stipulated price per security;

• through the writing or settlement of options or other hedging transactions, whether through an options exchange or otherwise;

• by pledge to secured debts and other obligations;

• delayed delivery arrangements;

• to or through underwriters or broker-dealers;

• “at the market” offerings, as defined in Rule 415 under the Securities Act of 1933, as amended (the “Securities Act”), at negotiated prices, at prices prevailing at the time of sale or at prices related to such prevailing market prices, including sales made directly on a national securities exchange or sales made through a market maker other than on an exchange or other similar offerings through sales agents;

• options transactions;

• a combination of any such methods of sale; or

• any other method permitted pursuant to applicable law.

The selling shareholders may also sell the ordinary shares under Rule 144 or any other exemption from registration under the Securities Act, if available, rather than under this prospectus.

In addition, a selling shareholder that is an entity may elect to make a pro rata in-kind distribution of securities to its members, partners or stockholders pursuant to the registration statement of which this prospectus is a part by delivering a prospectus with a plan of distribution. Such members, partners or stockholders would thereby receive freely tradeable securities pursuant to the distribution through a registration statement. To the extent a distributee is our affiliate (or to the extent otherwise required by law), we may, at our option, file a prospectus supplement in order to permit the distributees to use the prospectus to resell the securities acquired in the distribution.

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Broker-dealers engaged by the selling shareholders may arrange for other brokers-dealers to participate in sales. Broker-dealers may receive commissions or discounts from the selling shareholders (or, if any broker-dealer acts as agent for the purchaser of our ordinary shares, from the purchaser) in amounts to be negotiated, but, except as set forth in a supplement to this prospectus, in the case of an agency transaction not in excess of a customary brokerage commission in compliance with Financial Industry Regulatory Authority, (“FINRA”), Rule 5110; and in the case of a principal transaction a markup or markdown in compliance with FINRA Rule 2121.

To the extent required, this prospectus may be amended or supplemented from time to time to describe a specific plan of distribution. In connection with the sale of our ordinary shares or interests therein, the selling shareholders may enter into hedging transactions with broker-dealers or other financial institutions, which may in turn engage in short sales of our ordinary shares in the course of hedging the positions they assume. The selling shareholders may also sell our ordinary shares short and deliver these shares to close out their short positions, or loan or pledge the securities to broker-dealers that in turn may sell these shares. The selling shareholders may also enter into option or other transactions with broker-dealers or other financial institutions or create one or more derivative securities which require the delivery to such broker-dealer or other financial institution of securities offered by this prospectus, which securities such broker-dealer or other financial institution may resell pursuant to this prospectus (as supplemented or amended to reflect such transaction). The selling shareholders may also pledge securities to a broker-dealer or other financial institution, and, upon a default, such broker-dealer or other financial institution, may effect sales of the pledged securities pursuant to this prospectus (as supplemented or amended to reflect such transaction).

In effecting sales, broker-dealers or agents engaged by the selling shareholders may arrange for other broker-dealers to participate. Broker-dealers or agents may receive commissions, discounts or concessions from the selling shareholders in amounts to be negotiated immediately prior to the sale.

Any broker-dealers or agents that are involved in selling the securities may be deemed to be “underwriters” within the meaning of the Securities Act in connection with such sales. In such event, any commissions received by such broker-dealers or agents and any profit on the resale of the shares of our ordinary shares purchased by them may be deemed to be underwriting commissions or discounts under the Securities Act.

We are required to pay certain fees and expenses incurred by us incident to the registration of our ordinary shares. We and the selling shareholders have agreed to indemnify each other against certain losses, claims, damages and liabilities, including liabilities under the Securities Act.

The resale securities will be sold only through registered or licensed brokers or dealers if required under applicable state securities laws. In addition, in certain states, the resale securities covered hereby may not be sold unless they have been registered or qualified for sale in the applicable state or an exemption from the registration or qualification requirement is available and is complied with.

Under applicable rules and regulations under the Exchange Act, any person engaged in the distribution of the resale shares of our ordinary shares may not simultaneously engage in market making activities with respect to our ordinary shares for the applicable restricted period, as defined in Regulation M, prior to the commencement of the distribution. In addition, the selling shareholders will be subject to applicable provisions of the Exchange Act and the rules and regulations thereunder, including Regulation M, which may limit the timing of purchases and sales of our ordinary shares by the selling shareholders or any other person. We will make copies of this prospectus available to the selling shareholders and have informed them of the need to deliver a copy of this prospectus to each purchaser at or prior to the time of the sale (including by compliance with Rule 172 under the Securities Act).

At the time a particular offer of securities is made, if required, a prospectus supplement will be distributed that will set forth the number of securities being offered and the terms of the offering, including the name of any underwriter, dealer or agent, the purchase price paid by any underwriter, any discount, commission and other item constituting compensation, any discount, commission or concession allowed or reallowed or paid to any dealer, and the proposed selling price to the public.

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EXPENSES

We estimate that our expenses in connection with this offering will be as follows:

Expenses			Amount
SEC registration fee			$40,053.99
NYSE listing fee			*
Transfer agent’s fee			*
Printing expenses			*
Legal fees and expenses			*
Accounting fees and expenses			*
Miscellaneous costs			*
Total			*

*
Estimated expenses not currently known.

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LEGAL MATTERS

Certain legal matters of U.S. federal law will be passed upon for us by Gibson, Dunn & Crutcher LLP, Houston, Texas. The validity of our ordinary shares and certain other matters of UK law will be passed upon for us by Latham & Watkins (London) LLP. Any underwriters will be represented by their own legal counsel.

EXPERTS

Independent Registered Public Accounting Firm

The financial statements and management’s assessment of the effectiveness of internal control over financial reporting (which is included in Management’s Annual Report on Internal Control over Financial Reporting) incorporated in this prospectus by reference to the Annual Report on Form 20-F for the year ended December 31, 2024 have been so incorporated in reliance on the report of PricewaterhouseCoopers LLP, an independent registered public accounting firm, given on the authority of said firm as experts in auditing and accounting.

The current address of PricewaterhouseCoopers LLP is 569 Brookwood Village, Suite 851, Birmingham, Alabama, 35209.

The audited historical statement of revenues and direct operating expenses for the natural gas and oil properties of OCM Denali Holdings, L.L.C. for the year ended December 31, 2023 incorporated by reference in this prospectus by reference to Exhibit 99.2 of Diversified Energy Company PLC’s Report on Form 6-K, dated August 20, 2024, has been so incorporated in reliance on the report (which contains an explanatory paragraph relating to the basis of presentation as described in Note 1 to the statement) of PricewaterhouseCoopers LLP, an independent registered public accounting firm, given on the authority of said firm as experts in auditing and accounting.

The audited historical financial statements of Maverick Natural Resources, LLC as of and for the year ended December 31, 2023 incorporated by reference in this prospectus by reference to Exhibit 99.1 of Diversified Energy Company PLC’s Report on Form 6-K dated May 16, 2025, have been so incorporated in reliance on the report of PricewaterhouseCoopers LLP, an independent registered public accounting firm, given on the authority of said firm as experts in auditing and accounting.

The consolidated financial statements of Maverick Natural Resources, LLC as of and for the year ended December 31, 2024 incorporated by reference in this prospectus by reference to Exhibit 99.1 of Diversified Energy Company PLC’s Report on Form 6-K, dated May 16, 2025, have been so incorporated in reliance on the report of BDO USA, P.C., independent auditors, given on the authority of said firm as experts in auditing and accounting.

Independent Petroleum Engineers

The letter report, included as an exhibit to the Company’s annual report on Form 20-F for the year ended December 31, 2024, of Netherland, Sewell & Associates, Inc., independent consulting petroleum engineers, and information with respect to our natural gas, oil and NGL reserves derived from such report, have been referred to and incorporated in this prospectus upon the authority of such firm as experts with respect to such matters covered in such report and in giving such report. The current address of Netherland, Sewell & Associates, Inc. is 2100 Ross Avenue, Suite 2200, Dallas, Texas 75201.

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SERVICE OF PROCESS AND ENFORCEMENT OF CIVIL LIABILITIES

We are incorporated and currently existing under the laws of the United Kingdom. In addition, certain of our directors and officers reside outside the United States. As a result, it may be difficult for investors to effect service of process on us or those persons in the United States or to enforce in the United States judgments obtained in United States courts against us or those persons based on the civil liability or other provisions of the United States securities laws or other laws. In addition, uncertainty exists as to whether the courts of the United Kingdom would:

• recognize or enforce judgments of United States courts obtained against us or our directors or officers predicated upon the civil liabilities provisions of the securities laws of the United States or any state in the United States; or

• entertain original actions brought in the United Kingdom against us or our directors or officers predicated upon the securities laws of the United States or any state in the United States.

We have been advised by Latham & Watkins (London) LLP that there is currently no treaty between (i) the United States and (ii) the United Kingdom providing for reciprocal recognition and enforcement of judgments of United States courts in civil and commercial matters (although the United States and the United Kingdom are both parties to the New York Convention on the Recognition and Enforcement of Foreign Arbitral Awards) and that a final judgment for the payment of money rendered by any general or state court in the United States based on civil liability, whether or not predicated solely upon the United States securities laws, would not be automatically enforceable in the United Kingdom. We have also been advised by Latham & Watkins (London) LLP that any final and conclusive monetary judgment for a definite sum obtained against us in United States courts would be treated by the courts of the United Kingdom as a cause of action in itself and sued upon as a debt at common law so that no retrial of the issues would be necessary, provided that:

• the relevant U.S. court had jurisdiction over the original proceedings according to UK conflicts of laws principles at the time when proceedings were initiated;

• the UK courts had jurisdiction over the matter on enforcement and we either submitted to such jurisdiction or were resident or carrying on business within such jurisdiction and were duly served with process;

• the U.S. judgment was final and conclusive on the merits in the sense of being final and unalterable in the court that pronounced it and being for a definite sum of money;

• the judgment given by the courts was not in respect of penalties, taxes, fines or similar fiscal or revenue obligations (or otherwise based on a U.S. law that a UK court considers to relate to a penal, revenue or other public law);

• the judgment was not procured by fraud;

• recognition or enforcement of the judgment in the United Kingdom would not be contrary to public policy or the Human Rights Act 1998;

• the proceedings pursuant to which judgment was obtained were not contrary to natural justice;

• the U.S. judgment was not arrived at by doubling, trebling or otherwise multiplying a sum assessed as compensation for the loss or damages sustained and not being otherwise in breach of Section 5 of the UK Protection of Trading Interests Act 1980, or is a judgment based on measures designated by the Secretary of State under Section 1 of that Act;

• there is not a prior decision of a UK court or the court of another jurisdiction on the issues in question between the same parties; and

• the UK enforcement proceedings were commenced within the limitation period.

Whether these requirements are met in respect of a judgment based upon the civil liability provisions of the U.S. securities laws, including whether the award of monetary damages under such laws would constitute a penalty, is an issue for the court making such decision.

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Subject to the foregoing, investors may be able to enforce in the United Kingdom judgments in civil and commercial matters that have been obtained from U.S. federal or state courts. Nevertheless, we cannot assure you that those judgments will be recognized or enforceable in the United Kingdom.

If a UK court gives judgment for the sum payable under a U.S. judgment, the UK judgment will be enforceable by methods generally available for this purpose. These methods generally permit the UK court discretion to prescribe the manner of enforcement. In addition, it may not be possible to obtain a UK judgment or to enforce that judgment if the judgment debtor is or becomes subject to any insolvency or similar proceedings, or if the judgment debtor has any set-off or counterclaim against the judgment creditor. Also note that, in any enforcement proceedings, the judgment debtor may raise any counterclaim that could have been brought if the action had been originally brought in the UK unless the subject of the counterclaim was in issue and denied in the U.S. proceedings.

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WHERE YOU CAN FIND MORE INFORMATION

We have filed with the SEC a registration statement (including amendments and exhibits to the registration statement) on Form F-3 under the Securities Act with respect to the securities offered in this prospectus, which constitutes a part of the registration statement. This prospectus does not contain all of the information set forth in the registration statement or the exhibits and schedules filed therewith. For further information with respect to us and the securities offered by this prospectus, reference is made to the registration statement and the exhibits and schedules filed therewith. Statements contained in this prospectus regarding the contents of any contract or any other document that is filed as an exhibit to the registration statement are not necessarily complete, and each such statement is qualified in all respects by reference to the full text of such contract or other document filed as an exhibit to the registration statement. The SEC maintains a website that contains reports, proxy and information statements and other information regarding registrants that file electronically with the SEC. The address is www.sec.gov. We currently make available to the public our annual and interim reports, as well as certain information regarding our corporate governance and other matters on our website www.div.energy. The reference to our website address does not constitute incorporation by reference of the information contained on or available through our website, and you should not consider it to be a part of this prospectus.

As a foreign private issuer, we are exempt under the Exchange Act from, among other things, certain rules prescribing the furnishing and content of proxy statements, and our executive officers, directors and principal shareholders are exempt from the reporting and short-swing profit recovery provisions contained in Section 16 of the Exchange Act. In addition, we are not required under the Exchange Act to file periodic reports and financial statements with the SEC as frequently or as promptly as U.S. companies whose securities are registered under the Exchange Act, including the filing of quarterly reports or current reports on Form 8-K. In accordance with the requirements under Exchange Act, we intend to file with the SEC and make available annual reports on Form 20-F within four months of our fiscal year-end, and provide to the SEC and make available other material information on Form 6-K.

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INCORPORATION OF CERTAIN INFORMATION BY REFERENCE

The SEC allows us to “incorporate by reference” into this prospectus information that we file with the SEC. This means that we can disclose important information to you by referring you to those documents. The information incorporated by reference is an important part of this prospectus. Information that we later provide to the SEC, and which is deemed to be “filed” with the SEC, will automatically update information previously filed with the SEC, and may replace information included in or incorporated by reference into this prospectus.

We incorporate by reference into this prospectus the documents listed below:

• our Annual Report on Form 20-F for the year ended December 31, 2024, filed with the SEC on March 17, 2025;

• Exhibit 99.1 and Appendix 1 of Exhibit 99.2 included in our Report on Form 6-K furnished to the SEC on January 27, 2025;

• our Reports on Form 6-K furnished to the SEC on August 20, 2024 (furnishing certain statements of revenues and direct operating expenses of OCM Denali Holdings, L.L.C. and pro forma financial information of the Company), February 21, 2025, March 10, 2025, March 14, 2025, March 28, 2025, April 9, 2025, April 14, 2025, May 12, 2025 and May 16, 2025; and

• the description of our ordinary shares contained in our registration statement on Form 20-F filed with the SEC on November 16, 2023, as amended on December 8, 2023.

We also incorporate by reference in this prospectus all subsequent annual reports filed with the SEC on Form 20-F under the Exchange Act, and those of our reports on Form 6-K furnished to the SEC that we specifically identify as being incorporated by reference in this prospectus after the date hereof and prior to the completion of an offering of securities under this prospectus.

We will provide, free of charge upon written or oral request, to each person to whom this prospectus is delivered, including any beneficial owner of the securities, a copy of any or all of the information that has been incorporated by reference into this prospectus, but which has not been delivered with the prospectus. Copies of these documents also may be obtained on the “Investor Resources” section of our website at www.div.energy. The information contained on or linked to or from our website is not incorporated by reference into this prospectus and should not be considered part of this prospectus. Requests for such information should be made to us at the following address:

Diversified Energy Company PLC

1600 Corporate Drive

Birmingham, Alabama 35242

Telephone: (205) 408-0909

Attention: Investor Relations

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5,713,353 Ordinary Shares

Diversified Energy Company PLC

PRELIMINARY PROSPECTUS SUPPLEMENT

  , 2025

Joint Book-Running Managers

Mizuho						Raymond James
			Citigroup

FAQ

What shares are being offered in the DEC prospectus?

The prospectus covers a selling-stockholder offering of 5,713,353 ordinary shares (£0.20 nominal par value).

At what prices were DEC shares last reported on Sept 15, 2025?

The last reported sale prices on Sept 15, 2025 were $15.20 on the NYSE and £11.31 on the LSE (approx. $15.37 using the assumed rate).

Does the EBT plan to buy any DEC shares?

The Diversified Employee Benefit Trust indicated non-binding interest to purchase up to 750,000 ordinary shares at the public offering price, but made no firm commitment.

Is there an over-allotment option for this offering?

Yes. The underwriters have a 30-day option to purchase up to 857,002 additional ordinary shares to cover over-allotments.

What is the company’s reporting status and will it change?

The company is a foreign private issuer through Dec 31, 2025 and expects to no longer qualify as such beginning in 2026, after which it will follow domestic U.S. reporting requirements.

What notable investor risks does the prospectus list?

Key risks disclosed include commodity price volatility, integration risks from acquisitions, liquidity and credit access concerns, regulatory and environmental risks, and potential tax complexities.