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* Greth Lyndal (Last) (First) (Middle) C/O KATTEN MUCHIN ROSENMAN LLP 2121 N. PEARL STREET, SUITE 1100 (Street) DALLAS TX 75201 (City) (State) (Zip)	2. Date of Event Requiring Statement (Month/Day/Year) 09/10/2024	3. Issuer Name and Ticker or Trading Symbol Diamondback Energy, Inc. [ FANG ]
		4. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director 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) 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	11,726,706	I	See footnote(1)(5)
Common Stock	1,172,670	I	See footnote(2)(5)
Common Stock	65,901,525	I	See footnote(3)(5)
Common Stock	36,098,477	I	See footnote(4)(5)

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

1. Name and Address of Reporting Person* Greth Lyndal (Last) (First) (Middle) C/O KATTEN MUCHIN ROSENMAN LLP 2121 N. PEARL STREET, SUITE 1100 (Street) DALLAS TX 75201 (City) (State) (Zip)

1. Name and Address of Reporting Person* ACS Capital Management, LLC (Last) (First) (Middle) C/O KATTEN MUCHIN ROSENMAN LLP 2121 N. PEARL STREET, SUITE 1100 (Street) DALLAS TX 75201 (City) (State) (Zip)

1. Name and Address of Reporting Person* ACS Capital Holdings, LP (Last) (First) (Middle) C/O KATTEN MUCHIN ROSENMAN LLP 2121 N. PEARL STREET, SUITE 1100 (Street) DALLAS TX 75201 (City) (State) (Zip)

1. Name and Address of Reporting Person* Stephens Family Trust (Last) (First) (Middle) C/O KATTEN MUCHIN ROSENMAN LLP 2121 N. PEARL STREET, SUITE 1100 (Street) DALLAS TX 75201 (City) (State) (Zip)

1. Name and Address of Reporting Person* Stephens Family Trust #2 (Last) (First) (Middle) C/O KATTEN MUCHIN ROSENMAN LLP 2121 N. PEARL STREET, SUITE 1100 (Street) DALLAS TX 75201 (City) (State) (Zip)

1. Name and Address of Reporting Person* SFT Management, LLC (Last) (First) (Middle) C/O KATTEN MUCHIN ROSENMAN LLP 2121 N. PEARL STREET, SUITE 1100 (Street) DALLAS TX 75201 (City) (State) (Zip)

1. Name and Address of Reporting Person* SFT 1 Holdings, LLC (Last) (First) (Middle) C/O KATTEN MUCHIN ROSENMAN LLP 2121 N. PEARL STREET, SUITE 1100 (Street) DALLAS TX 75201 (City) (State) (Zip)

1. Name and Address of Reporting Person* SFT 2 Holdings, LLC (Last) (First) (Middle) C/O KATTEN MUCHIN ROSENMAN LLP 2121 N. PEARL STREET, SUITE 1100 (Street) DALLAS TX 75201 (City) (State) (Zip)

1. Name and Address of Reporting Person* Autry Stephens Management Trust (Last) (First) (Middle) C/O KATTEN MUCHIN ROSENMAN LLP 2121 N. PEARL STREET, SUITE 1100 (Street) DALLAS TX 75201 (City) (State) (Zip)

1. Name and Address of Reporting Person* Endeavor Manager, LLC (Last) (First) (Middle) C/O KATTEN MUCHIN ROSENMAN LLP 2121 N. PEARL STREET, SUITE 1100 (Street) DALLAS TX 75201 (City) (State) (Zip)

Explanation of Responses:

1. By ACS Capital Holdings, LP. Lyndal Stephens Greth is the sole trustee of the Autry Stephens Management Trust dated March 20, 2018, as amended, and the sole manager of ACS Capital Management, LLC. ACS Capital Management, LLC is the general partner, and the Autry Stephens Management Trust is the sole limited partner of ACS Capital Holdings, LP.

2. By Endeavor Manager, LLC. Lyndal Stephens Greth is the sole trustee of the Autry Stephens Management Trust dated March 20, 2018, as amended, and the sole manager of ACS Capital Management, LLC. ACS Capital Management, LLC is the general partner, and the Autry Stephens Management Trust is the sole limited partner of ACS Capital Holdings, LP. ACS Capital Holdings, LP is the sole member of Endeavor Manager, LLC.

3. By SFT 1 Holdings, LLC. Lyndal Stephens Greth is the sole Investment Direction Adviser who may direct investment decisions of the Stephens Family Trust, a directed trust, a co-trustee of the Stephens Family Trust, and the sole member and manager of SFT Management, LLC. The Stephens Family Trust is the sole member of SFT 1 Holdings, LLC. SFT Management, LLC is the sole manager of SFT 1 Holdings, LLC.

4. By SFT 2 Holdings, LLC. Lyndal Stephens Greth is the sole Investment Direction Adviser who may direct investment decisions of the Stephens Family Trust #2, a directed trust, a co-trustee of the Stephens Family Trust #2, and the sole member and manager of SFT Management, LLC. The Stephens Family Trust #2 is the sole member of SFT 2 Holdings, LLC. SFT Management, LLC is the sole manager of SFT 2 Holdings, LLC.

5. Lyndal Stephens Greth may be deemed to beneficially own the shares of Company Common Stock beneficially owned by each of the Reporting Persons but disclaims beneficial ownership except to the extent of her pecuniary interest therein.

	/s/ Lyndal Stephens Greth , Attorney-in-fact	09/13/2024
	** Signature of Reporting Person	Date
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