Transaction in Own Shares

DIVERSIFIED ENERGY COMPANY

("Diversified", or the "Company")

DIVERSIFIED ENERGY COMPANY (NYSE:DEC; LSE:DEC) announces that, in accordance with the terms of its share buyback program announced on February 25, 2026 that, during the period between November 5 2026 and November 11 2026, the Company has purchased 596,358 shares of common stock, par value $0.01 per share of the Company (the "Shares") in the market at a volume-weighted average price of $13.2454 per Share through Mizuho Securities USA LLC (MSUSA). The Shares acquired will, in due course, be cancelled.

Aggregated Information

Following the cancellation of the Shares, Diversified will have 70,122,642 shares of common stock, in issue and no shares of common stock are held in treasury. This figure of 70,122,642 may be used by shareholders as the denominator for the calculations by which they will determine if they are required to notify their interest in, or a change to their interest in, the Company under the FCA’s Disclosure Guidance and Transparency Rules.

In accordance with Article 5(1)(b) of Regulation (EU) No 596/2014 (the Market Abuse Regulation), (as in force in the UK and as amended by the Market Abuse (Amendment) (EU Exit) Regulations 2019), the table below contains aggregated information per trading day and trading venue, on the trades made by Mizuho Securities USA LLC as part of the buyback program. A full breakdown of the individual trades can be found below.

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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.