Sec Form 3/A Filing - Wade Randall S. @ Diversified Energy Co - 2025-11-21

FORM 3/A Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Wade Randall S. 2. Issuer Name and Ticker or Trading Symbol Diversified Energy Co [ DEC] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director X __ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) C/O DIVERSIFIED ENERGY COMPANY, 1600 CORPORATE DRIVE 3. Date of Earliest Transaction (MM/DD/YY) 11/21/2025 (Street) BIRMINGHAM, AL35242 4. If Amendment, Date Original Filed (MM/DD/YY) 12/01/2025 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common stock, par value $0.01 per share 9,601,585 I See footnote ( 1 )

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Wade Randall S. C/O DIVERSIFIED ENERGY COMPANY 1600 CORPORATE DRIVE BIRMINGHAM, AL35242 X X Signatures /s/ Benjamin Sullivan, Attorney-in-Fact 12/15/2025 Signature of Reporting Person Date

Explanation of Responses:

( 1 )This amendment to the Form 3 filed on December 1, 2025 is being filed to include securities omitted from the original Form 3 filing which are held by various funds and accounts, including EIG Redwood Co-Investment, L.P., EIG Energy XV Blocker Agent (Redwood), Inc., EIG Holdings Carry Splitter (Redwood), L.P., EIG Energy Fund XV, L.P., EIG Energy Fund XV-A, L.P., EIG Energy Fund XVI, L.P., EIG Energy Fund XVI-E, L.P., EIG Energy Fund XVI Holdings Splitter (FourPoint), L.P. and EIG Energy Fund XV Blocker Series C (FourPoint) LLC (the "Funds"). In this regard, the Reporting Person's role on the investment committees of the general partners of the Funds gives him voting and dispositive power over the reported securities but the Reporting Person disclaims beneficial ownership except to the extent of his pecuniary interest therein.

Remarks: Exhibit 24 - Power of Attorney

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

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