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SEC Form 3

FORM 3

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

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1. Name and Address of Reporting Person* SGF FANG Holdings, LP (Last) (First) (Middle) C/O KEVIN T. KEEN 8111 DOUGLAS AVENUE, SUITE 1200 (Street) DALLAS TX 75225 (City) (State) (Zip)	2. Date of Event Requiring Statement (Month/Day/Year) 08/13/2025	3. Issuer Name and Ticker or Trading Symbol Diamondback Energy, Inc. [ FANG ]
		4. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director X 10% Owner Officer (give title below) Other (specify below)	5. If Amendment, Date of Original Filed (Month/Day/Year)
			6. Individual or Joint/Group Filing (Check Applicable Line) X Form filed by One Reporting Person Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock	101,686,727(1)	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. In connection with an internal reorganization among entities controlled by Lyndal Stephens Greth ("Mrs. Stephens Greth") that streamlined Mrs. Stephens Greth's share ownership structure, SGF FANG Holdings, LP became the record holder of 101,686,727 shares of Common Stock, par value $0.01 per share (the "Company Common Stock"), of Diamondback Energy, Inc., a Delaware corporation, on August 13, 2025 (the "Reorganization") as reported on the Schedule 13D/A filed with the Securities and Exchange Commission by Mrs. Stephens Greth and certain other entities she controls on August 15, 2025. Mrs. Stephens Greth was, and following the Reorganization continues to be, the ultimate beneficial owner of the Company Common Stock held of record by SGF FANG Holdings, LP. Mrs. Stephens Greth disclaims beneficial ownership over any of the shares reported on this Form 3 except to the extent of her pecuniary interest therein.

	/s/ Kevin T. Keen, Attorney in fact	08/15/2025
	** Signature of Reporting Person	Date
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 5 (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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