SCHEDULE 13D/A

Diversified Energy Co

Common Stock, par value $0.01 per share · CUSIP: 25520W107

Event date: 2026-03-11

Reporting persons may disclose overlapping interests. Their amounts are shown individually and are not added into a filing total.

Filing-level shares

Unavailable

Percent of class

Unavailable

• EIG Redwood Co-Investment, L.P.Reported CIK 0001636951

  Shares: 0.00 · Class: 0.00%

• EIG Energy XV Blocker Agent (Redwood), LLCReported CIK 0002069543

  Shares: 0.00 · Class: 0.00%

• EIG Holdings Carry Splitter (Redwood), L.P.Reported CIK 0002069539

  Shares: 0.00 · Class: 0.00%

• EIG Energy Fund XV, L.P.Reported CIK 0002069540

  Shares: 0.00 · Class: 0.00%

• EIG Energy Fund XV-A, L.P.Reported CIK 0002069541

  Shares: 0.00 · Class: 0.00%

• EIG Energy Fund XVI, L.P.Reported CIK 0001578109

  Shares: 0.00 · Class: 0.00%

• EIG Energy Fund XVI-E, L.P.Reported CIK 0001591998

  Shares: 0.00 · Class: 0.00%

• EIG Energy Fund XVI Holdings Splitter (FourPoint), L.P.Reported CIK 0002069542

  Shares: 0.00 · Class: 0.00%

• EIG Energy Fund XV Blocker Series C (FourPoint) LLCReported CIK 0002070688

  Shares: 0.00 · Class: 0.00%

Amounts are as disclosed in this filing. Schedule type alone does not establish investment intent.