Holding(s) in Company

Rhea-AI Summary

Diversified Energy Company (Ticker: DEC) received a major‑holdings notification dated 20-Oct-2025 reporting that Ameriprise Financial, Inc. (via Columbia Management Investment Advisers, LLC) crossed the 5% threshold on 17-Oct-2025.

The resulting position on the crossing date was 5.019% of voting rights, representing 3,857,026 voting rights; the prior notified position was 4.971%.

The filing lists the full chain of controlled undertakings and states no financial instruments were used to reach the threshold.

Positive

• Threshold crossed: position exceeded 5% on 17-Oct-2025
• Voting rights held: 3,857,026 (5.019%) reported on 17-Oct-2025
• Clear ownership chain: Columbia Management Investment Advisers wholly owned by Ameriprise

Negative

• None.

Insights

Equity Ownership Analyst

Ameriprise crossed a >5% ownership threshold in Diversified Energy on 17-Oct-2025, holding 3,857,026 shares (5.019%).

Business mechanism: The filing shows that Ameriprise Financial, Inc. — via Columbia Management Investment Advisers, LLC — holds 5.019% of voting rights (3,857,026 votes) in Diversified Energy Company plc, with the threshold crossed on 17-Oct-2025 and the issuer notified on 20-Oct-2025. The disclosure follows the standard TR-1 process for notifying major holdings under UK rules.

Dependencies and risks: This is a positional disclosure only; it does not state any change in control, financing, or planned corporate action. The ownership sits within Ameriprise’s reported chains, specifically naming Columbia Management Investment Advisers, LLC as the holder at 5.009% in one chain and the overall result as 5.019%. The filing contains no statements about intent, voting arrangements, or derivative exposure.

Concrete items to watch: monitor any follow-up TR-1s for increases or decreases in the 5.019% stake and any disclosures of intent or voting agreements; the immediate relevant dates are the crossing date 17-Oct-2025 and completion date 20-Oct-2025. Short horizon: next statutory filings; medium horizon: any subsequent notifications that change the stated or voting structure.

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

FAQ

What stake did Ameriprise report in Diversified Energy Company (DEC) on 17-Oct-2025?

Ameriprise (via Columbia Management Investment Advisers) reported a 5.019% stake representing 3,857,026 voting rights.

When did Ameriprise cross the 5% disclosure threshold in DEC?

The threshold was crossed on 17-Oct-2025 and the issuer was notified on 20-Oct-2025.

Did the filing for DEC indicate use of financial instruments to reach 5.019%?

No — the notification reports 0% voting rights via financial instruments.

How did Ameriprise hold the DEC shares reported in the 20-Oct-2025 filing?

The filing attributes the holdings to Columbia Management Investment Advisers, LLC, a wholly owned affiliate of Ameriprise.

What was the previously reported stake in DEC before crossing 5%?

The prior notified position was 4.971%.