Form: 20-F

Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

March 19, 2024

Exhibit 8.1

Subsidiaries of Diversified Energy Company PLC as of December 31, 2023

Name of Subsidiary Jurisdiction
Diversified Gas & Oil Corporation United States
Diversified Production LLC United States
Diversified Midstream LLC United States
Diversified Energy Marketing, LLC United States
Diversified ABS Holdings LLC United States
Diversified ABS LLC United States
Diversified ABS Phase II Holdings LLC United States
Diversified ABS Phase II LLC United States
Diversified ABS Phase III Holdings LLC United States
Diversified ABS Phase III LLC United States
Diversified ABS Phase III Upstream LLC United States
Diversified ABS Phase III Midstream LLC United States
Diversified ABS Phase IV Holdings LLC United States
Diversified ABS Phase IV LLC United States
Diversified ABS Phase V Holdings LLC United States
Diversified ABS Phase V LLC United States
Diversified ABS Phase V Upstream LLC United States
Sooner State Joint ABS Holdings LLC United States
Diversified ABS Phase VI Holdings LLC United States
Diversified ABS Phase VI LLC United States
Diversified ABS VI Upstream LLC United States
Oaktree ABS VI Upstream LLC United States
ABS 7 Manager LLC United States
DP Lion Equity Holdco LLC United States
DP Lion HoldCo LLC United States
DP RBL Co LLC United States
DP Legacy Central LLC United States
DP Production Holdings II LLC United States
DGOC Holdings Sub II LLC United States
DP Bluegrass Holdings LLC United States
DP Bluegrass LLC United States
BlueStone Natural Resources II, LLC United States
Cranberry Pipeline Corporation United States
Coalfield Pipeline Company United States
DM Bluebonnet LLC United States
DP Tapstone Energy Holdings, LLC United States
DP Legacy Tapstone LLC United States
Chesapeake Granite Wash Trust United States
TGG Cotton Valley Assets, LLC United States
Black Bear Midstream Holdings LLC United States
Black Bear Midstream LLC United States
Black Bear Liquids LLC United States
Black Bear Liquids Marketing LLC United States
DM Pennsylvania Holdco LLC United States
Diversified Energy Group LLC United States
Diversified Energy Company LLC United States
Next LVL Energy, LLC United States
Splendid Land, LLC United States
Riverside Land, LLC United States
Old Faithful Land, LLC United States
Link Land, LLC United States
Giant Land, LLC United States