REG-Transaction in Own Shares

Diversified Energy CoAnnouncement

17/12/2025 07:02

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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 March 20, 2025, the
Company has purchased 158,447 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 $13.7436 per Share through Mizuho Securities USA LLC (MSUSA). The
Shares acquired will, in due course, be cancelled.

Aggregated Information

 Date of Purchase:                                    December 16, 2025  
 Aggregate Number of Shares Purchased:                158,447            
 Lowest Price Paid per Share (USD):                   13.595             
 Highest Price Paid per Share (USD):                  13.94              
 Volume-Weighted Average Price Paid per Share (USD):  13.7436            
                                                                         

Following the cancellation of Shares, Diversified will have 80,164,402 shares
of common stock in issue and no shares of common stock held in treasury. This
figure of 80,164,402 shares 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 detailed
information of the individual trades made by Mizuho Securities USA LLC as part
of the buyback program.

Schedule of Purchases

 Shares purchased:                             DIVERSIFIED ENERGY COMPANY (ISIN: US25520W1071)                                                                                          
 Dates of purchases:                           16 December 2025                                                                                                                         
 Investment firm:                              Mizuho Securities USA LLC                                                                                                                
                                                                                                                                                                                        
 Aggregate number of ordinary shares acquired  Daily volume weighted average price paid            Daily highest price paid per share      Daily lowest price per share  Trading Venue  
 4,942                                         $13.7298                                            $13.85                                  $13.62                        ARCX           
 608                                           $13.7138                                            $13.79                                  $13.62                        ASPN           
 500                                           $13.7342                                            $13.78                                  $13.67                        BAML           
 983                                           $13.7406                                            $13.85                                  $13.60                        BATS           
 981                                           $13.7563                                            $13.90                                  $13.66                        BATY           
 256                                           $13.7150                                            $13.82                                  $13.67                        EDGA           
 1,574                                         $13.7505                                            $13.85                                  $13.61                        EDGX           
 116,239                                       $13.7428                                            $13.94                                  $13.60                        IEXG           
 1,853                                         $13.7086                                            $13.79                                  $13.63                        JPMX           
 3,733                                         $13.7180                                            $13.81                                  $13.66                        JSJX           
 3,000                                         $13.7850                                            $13.79                                  $13.78                        LEVL           
 139                                           $13.6780                                            $13.71                                  $13.62                        SGMT           
 7,068                                         $13.7471                                            $13.90                                  $13.62                        UBSA           
 500                                           $13.7338                                            $13.92                                  $13.69                        XBOS           
 299                                           $13.7875                                            $13.82                                  $13.73                        XCIS           
 8,593                                         $13.7516                                            $13.92                                  $13.61                        XNAS           
 7,179                                         $13.7279                                            $13.90                                  $13.60                        XNYS           
 Trading venue                                 Currency                                                                                                                                 
 NYSE                                          USD                                                 $13.7436                                158,447                                      

For further information, please contact:

 Diversified Energy Company                                            +1 973 856 2757  
 Doug Kris                                                             dkris@dgoc.com   
 Senior Vice President, Investor Relations & Corporate Communications  www.div.energy   
                                                                                        

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