Diversified Energy CompanyNYSE: DEC

Diversified Energy PLC - Transaction in Own Shares

· Issued by Diversified Energy Company

DIVERSIFIED ENERGY COMPANY PLC

("Diversified", or the "Company")

DIVERSIFIED ENERGY COMPANY PLC (LSE:DEC, NYSE:DEC) announces that, in accordance with the terms of its share buyback programme announced on 20 March 2025, the Company has purchased 145,775 Ordinary Shares of 20 Pence each in the capital of the Company (the "Shares") in the market at a volume-weighted average price of $13.8494 per Share through Mizuho Securities USA LLC (MSUSA). The Shares acquired will, in due course, be cancelled.

Aggregated Information

Date of Purchase:

02 October 2025

Aggregate Number of Ordinary Shares Purchased:

145,775

Lowest Price Paid per Share (USD):

13.715

Highest Price Paid per Share (USD):

14.00

Volume-Weighted Average Price Paid per Share (USD):

13.8494

Following the cancellation of Shares, Diversified will have 76,976,045 Ordinary Shares of 20 Pence each in issue and no Ordinary Shares are held in treasury. This figure of 76,976,045 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 programme.

Schedule of Purchases

Shares purchased:

DIVERSIFIED ENERGY COMPANY PLC (ISIN: GB00BQHP5P93)

Dates of purchases:

2 October 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

8,177

$13.8358

$14.00

$13.72

ARCX

4,266

$13.8622

$14.00

$13.77

ASPN

448

$13.8088

$13.86

$13.77

BAML

3,808

$13.9080

$14.00

$13.73

BATS

1,562

$13.8718

$13.89

$13.83

BATY

188

$13.8400

$13.84

$13.84

CPGX

900

$13.9058

$14.00

$13.85

EDGA

863

$13.8786

$13.98

$13.83

EDGX

400

$13.9400

$13.94

$13.94

HRTF

81,679

$13.8410

$14.00

$13.72

IEXG

930

$13.8885

$14.00

$13.77

JPMX

2,692

$13.8800

$13.98

$13.79

JSJX

363

$13.8280

$13.88

$13.78

MEMX

8,245

$13.8651

$14.00

$13.77

SGMT

5,864

$13.8916

$14.00

$13.77

UBSA

100

$14.0000

$14.00

$14.00

VFMI

900

$13.8853

$13.99

$13.83

XBOS

200

$13.9200

$13.97

$13.87

XCIS

12,084

$13.8592

$14.00

$13.73

XNAS

12,006

$13.8488

$13.99

$13.72

XNYS

100

$13.8500

$13.85

$13.85

XPSX

Trading venue

Currency

NYSE

USD

$13.8494

145,775

For further information, please contact:

Diversified Energy Company PLC

+1 973 856 2757

Doug Kris

dkris@dgoc.com

Senior Vice President, Investor Relations & Corporate Communications

www.div.energy

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.

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