Diversified Energy Company PLC (LSE: DEC) (NYSE: DEC), announces the vesting of certain Performance Stock Units (“PSU's”) and Restricted Stock Units ("RSU's") previously awarded to Persons Discharging Material Responsibility ("PDMRs"), resulting in a change to previously disclosed PDMR holdings of Ordinary Shares of £0.20 each in the Company ("Ordinary Shares").

Members of the Company's senior management vested in previously awarded PSUs and RSUs included:

Rusty Hutson, Jr, Co-Founder and Chief Executive OfficerBradley Gray, President and Chief Financial OfficerBenjamin Sullivan, Senior Executive Vice President, Chief Legal & Risk Officer and Corporate Secretary

Mr. Hutson's listed awards were solely PSUs, while the awards to Mr. Gray, and Mr. Sullivan included a mix of PSUs and RSUs. The Company provides additional information about its 2022 long-term incentive plan within its Annual Report for the year ended December 31, 2024 available on its website.

To settle the awards, the Company will transfer Ordinary Shares (net of customary withholdings, including taxes) from its Employee Benefit Trust (the “EBT”) as set forth in the table below:

Net AwardShares Held Post-Award% of Issued Share CapitalRusty Hutson, Jr42,0071,276,1411.58%Bradley Gray26,546192,1310.24%Benjamin Sullivan21,90262,3190.08%

For further information, please contact:

Diversified Energy Company PLC+1 973 856 2757Doug [email protected]  FTI [email protected]. & UK Financial Public Relations

About Diversified Energy Company PLC

Diversified is a leading publicly traded energy company focused on natural gas and liquids production, transport, marketing, and well retirement. Through our differentiated strategy, we acquire existing, long-life assets and invest in them to improve environmental and operational performance until retiring those assets in a safe and environmentally secure manner. Recognized by ratings agencies and organizations for our sustainability leadership, this solutions-oriented, stewardship approach makes Diversified the Right Company at the Right Time to responsibly produce energy, deliver reliable free cash flow, and generate shareholder value.

NOTIFICATION AND PUBLIC DISCLOSURE OF TRANSACTIONS BY PERSONS DISCHARGING MANAGERIAL RESPONSIBILITIES AND PERSONS CLOSELY ASSOCIATED WITH THEM

1Details of the person discharging managerial responsibilities / person closely associateda)NameRusty Hutson, Jr2Reason for the notificationa)Position/statusCo-Founder and Chief Executive Officerb)Initial notification/AmendmentInitial notification3Details of the issuer, emission allowance market participant, auction platform, auctioneer or auction monitora)NameDiversified Energy Company PLCb)LEI213800YR9TFRVHPGOS674Details of the transaction(s): section to be repeated for (i) each type of instrument; (ii) each type of transaction; (iii) each date; and (iv) each place where transactions have been conducteda)Description of the financial instrument, type of instrumentBonus award of performance share units constituting a right to acquire Ordinary Shares of 20p each Identification codeGB00BQHP5P93b)Nature of the transactionVesting of performance share units units under the Company's equity incentive planc)Price(s) and volumes(s)Price(s)Volume(s) £Nil42,007d)Aggregated informationN/A single transaction Aggregated volumeN/A single transaction PriceN/A single transactione)Date of the transaction17 March 2025f)Place of the transactionOutside a trading venue (XOFF)

1Details of the person discharging managerial responsibilities / person closely associateda)NameBradley Gray2Reason for the notificationa)Position/statusPresident and Chief Financial Officerb)Initial notification/AmendmentInitial notification3Details of the issuer, emission allowance market participant, auction platform, auctioneer or auction monitora)NameDiversified Energy Company PLCb)LEI213800YR9TFRVHPGOS674Details of the transaction(s): section to be repeated for (i) each type of instrument; (ii) each type of transaction; (iii) each date; and (iv) each place where transactions have been conducteda)Description of the financial instrument, type of instrumentBonus award of performance share units and restricted stock units constituting a right to acquire Ordinary Shares of 20p each Identification codeGB00BQHP5P93b)Nature of the transactionVesting of performance share units units under the Company's equity incentive planc)Price(s) and volumes(s)Price(s)Volume(s) £Nil26,546d)Aggregated informationN/A single transaction Aggregated volumeN/A single transaction PriceN/A single transactione)Date of the transaction17 March 2025f)Place of the transactionOutside a trading venue (XOFF)

1Details of the person discharging managerial responsibilities / person closely associateda)NameBenjamin Sullivan2Reason for the notificationa)Position/statusSenior Executive Vice President, Chief Legal & Risk Officer and Corporate Secretaryb)Initial notification/AmendmentInitial notification3Details of the issuer, emission allowance market participant, auction platform, auctioneer or auction monitora)NameDiversified Energy Company PLCb)LEI213800YR9TFRVHPGOS674Details of the transaction(s): section to be repeated for (i) each type of instrument; (ii) each type of transaction; (iii) each date; and (iv) each place where transactions have been conducteda)Description of the financial instrument, type of instrumentBonus award of performance share units and restricted stock units constituting a right to acquire Ordinary Shares of 20p each Identification codeGB00BQHP5P93b)Nature of the transactionVesting of performance share units and restricted stock units under the Company's equity incentive planc)Price(s) and volumes(s)Price(s)Volume(s) £Nil21,902d)Aggregated informationN/A single transaction Aggregated volumeN/A single transaction PriceN/A single transactione)Date of the transaction17 March 2025f)Place of the transactionOutside a trading venue (XOFF)