PDMR Shareholdings

March 20, 2026

Diversified Energy Company

("Diversified," or the "Company")

PDMR Shareholdings

Diversified Energy Company (NYSE: DEC, LSE: 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 shares of common stock in the Company ("Common Stock").

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

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 long-term incentive plan within its Annual Report on Form 10-K for the year ended December 31, 2025 available on its website.

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

For further information, please contact:

About Diversified Energy Company

Diversified is a leading publicly traded energy company focused on acquiring, operating, and optimizing cash generating energy assets. 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