Holding(s) in Company

TR-1: Standard form for notification of major holdings

1. Issuer Details

ISIN 
GB00BQHP5P93

Issuer Name 
DIVERSIFIED ENERGY COMPANY PLC

UK or Non-UK Issuer 
UK

2. Reason for Notification

An acquisition or disposal of voting rights 

3. Details of person subject to the notification obligation

Name 
Ameriprise Financial, Inc.

City of registered office (if applicable) 
Minneapolis

Country of registered office (if applicable) 
United States 

4. Details of the shareholder 

Full name of shareholder(s) if different from the person(s) subject to the notification obligation, above 

City of registered office (if applicable)

Country of registered office (if applicable)

5. Date on which the threshold was crossed or reached

17-Oct-2025

6. Date on which Issuer notified

20-Oct-2025

7. Total positions of person(s) subject to the notification obligation 

	% of voting rights attached to shares (total of 8.A)	% of voting rights through financial instruments (total of 8.B 1 + 8.B 2)	Total of both in % (8.A + 8.B)	Total number of voting rights held in issuer
Resulting situation on the date on which threshold was crossed or reached	5.019000	0.000000	5.019000	3857026
Position of previous notification (if applicable)	4.971000	0.000000	4.971000

8. Notified details of the resulting situation on the date on which the threshold was crossed or reached
8A. Voting rights attached to shares

Class/Type of shares ISIN code(if possible)	Number of direct voting rights (DTR5.1)	Number of indirect voting rights (DTR5.2.1)	% of direct voting rights (DTR5.1)	% of indirect voting rights (DTR5.2.1)
GB00BQHP5P93	0	3857026	0.000000	5.019000
Sub Total 8.A	3857026		5.019000%

8B1. Financial Instruments according to (DTR5.3.1R.(1) (a))

Type of financial instrument	Expiration date	Exercise/conversion period	Number of voting rights that may be acquired if the instrument is exercised/converted	% of voting rights
Sub Total 8.B1

8B2. Financial Instruments with similar economic effect according to (DTR5.3.1R.(1) (b))

Type of financial instrument	Expiration date	Exercise/conversion period	Physical or cash settlement	Number of voting rights	% of voting rights
Sub Total 8.B2

9. Information in relation to the person subject to the notification obligation
2. Full chain of controlled undertakings through which the voting rights and/or the financial instruments are effectively held starting with the ultimate controlling natural person or legal entities (please add additional rows as necessary)

Ultimate controlling person	Name of controlled undertaking	% of voting rights if it equals or is higher than the notifiable threshold	% of voting rights through financial instruments if it equals or is higher than the notifiable threshold	Total of both if it equals or is higher than the notifiable threshold
Ameriprise Financial, Inc. (Chain 1)		0.000000	0.000000	0.000000%
Ameriprise Financial, Inc.	Columbia Threadneedle Investments UK International Limited	0.000000	0.000000	0.000000%
Ameriprise Financial, Inc.	Columbia Threadneedle (Europe) Limited	0.000000	0.000000	0.000000%
Ameriprise Financial, Inc.	Columbia Threadneedle AM (Holdings) Plc	0.000000	0.000000	0.000000%
Ameriprise Financial, Inc.	Columbia Threadneedle Group (Holdings) Limited	0.000000	0.000000	0.000000%
Ameriprise Financial, Inc.	Columbia Threadneedle Group (Management) Limited	0.000000	0.000000	0.000000%
Ameriprise Financial, Inc.	Columbia Threadneedle Holdings Limited	0.000000	0.000000	0.000000%
Ameriprise Financial, Inc.	Columbia Threadneedle Management Limited	0.000000	0.000000	0.000000%
Ameriprise Financial, Inc. (Chain 2)		0.000000	0.000000	0.000000%
Ameriprise Financial, Inc.	Columbia Management Investment Advisers, LLC	5.009000	0.000000	5.009000%

10. In case of proxy voting
Name of the proxy holder

The number and % of voting rights held

The date until which the voting rights will be held

11. Additional Information
Columbia Management Investment Advisers, LLC is wholly owned by Ameriprise Financial, Inc.

Columbia Threadneedle Management Limited is wholly owned by Columbia Threadneedle Holdings Limited, which is wholly owned by Columbia Threadneedle Group (Management) Limited, which is wholly owned by Columbia Threadneedle Group (Holdings) Limited, which is wholly owned by Columbia Threadneedle AM (Holdings) Plc, which is wholly owned by Columbia Threadneedle (Europe) Limited, which is wholly owned by Columbia Threadneedle Investments UK International Limited, which is wholly owned by Ameriprise Financial, Inc.

12. Date of Completion 
20-Oct-2025

13. Place Of Completion 
Swindon, UK