Director-linked entity trims Diamondback (FANG) stake via 10b5-1 stock sales

Rhea-AI Filing Summary

Diamondback Energy director Charles Meloy, through Wolfrock Energy, LLC, sold 15,714 shares of common stock in open-market transactions on March 9–10, 2026. The sales were executed under a Rule 10b5-1 trading plan, meaning they were pre-scheduled rather than timed discretionarily.

The weighted average sale prices for the trades ranged from about $177.09 to $186.16 per share across multiple blocks. Following these transactions, entities associated with Meloy continued to hold 966,292 shares indirectly through Wolfrock Energy, LLC, plus 2,275 shares directly, indicating the sales represented a small portion of his overall reported position.

SEC Form 4

FORM 4

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
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

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

X

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Meloy Charles Alvin

(Last) (First) (Middle)

500 WEST TEXAS AVENUE

SUITE 100

(Street)

MIDLAND TX 79701

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Diamondback Energy, Inc. [ FANG ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
03/09/2026

4. 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 Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	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	03/09/2026		S		388(1)	D	$180.4464(2)	981,618	I(3)	Wolfrock Energy, LLC(3)
Common Stock	03/09/2026		S		709(1)	D	$181.433(4)	980,909	I(3)	Wolfrock Energy, LLC(3)
Common Stock	03/09/2026		S		1,849(1)	D	$182.6671(5)	979,060	I(3)	Wolfrock Energy, LLC(3)
Common Stock	03/09/2026		S		2,876(1)	D	$183.4302(6)	976,184	I(3)	Wolfrock Energy, LLC(3)
Common Stock	03/09/2026		S		1,465(1)	D	$184.4581(7)	974,719	I(3)	Wolfrock Energy, LLC(3)
Common Stock	03/09/2026		S		462(1)	D	$185.4029(8)	974,257	I(3)	Wolfrock Energy, LLC(3)
Common Stock	03/09/2026		S		108(1)	D	$186.1566(9)	974,149	I(3)	Wolfrock Energy, LLC(3)
Common Stock	03/10/2026		S		566(1)	D	$177.0942(10)	973,583	I(3)	Wolfrock Energy, LLC(3)
Common Stock	03/10/2026		S		1,686(1)	D	$178.0978(11)	971,897	I(3)	Wolfrock Energy, LLC(3)
Common Stock	03/10/2026		S		1,746(1)	D	$178.8219(12)	970,151	I(3)	Wolfrock Energy, LLC(3)
Common Stock	03/10/2026		S		1,075(1)	D	$180.247(13)	969,076	I(3)	Wolfrock Energy, LLC(3)
Common Stock	03/10/2026		S		1,329(1)	D	$181.1491(14)	967,747	I(3)	Wolfrock Energy, LLC(3)
Common Stock	03/10/2026		S		1,455(1)	D	$182.0306(15)	966,292	I(3)	Wolfrock Energy, LLC(3)
Common Stock								2,275	D

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 (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	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 (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (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: 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

Explanation of Responses:

1. The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

2. The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $179.915 per share to $180.805 per share, inclusive. The reporting person undertakes to provide to Diamondback Energy, Inc., any security holder of Diamondback Energy, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote and in footnotes 4 through 15.

3. These securities are held directly by Wolfrock Energy, LLC, a Texas limited liability company whose sole member is CS Ventures, Ltd. CS Ventures, Ltd. is controlled by its general partner, Meloy Management, LLC, which is controlled by the Reporting Person.

4. The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $180.975 per share to $181.970 per share, inclusive.

5. The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $181.975 per share to $182.970 per share, inclusive.

6. The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $183.00 per share to $183.99 per share, inclusive.

7. The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $184.010 per share to $184.945 per share, inclusive.

8. The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $185.015 per share to $186.005 per share, inclusive.

9. The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $186.05 per share to $186.31 per share, inclusive.

10. The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $176.505 per share to $177.42 per share, inclusive.

11. The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $177.54 per share to $178.525 per share, inclusive.

12. The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $178.57 per share to $179.53 per share, inclusive.

13. The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $179.615 per share to $180.57 per share, inclusive.

14. The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $180.69 per share to $181.655 per share, inclusive.

15. The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $181.695 per share to $182.515 per share, inclusive.

Remarks:

	/s/ Matt Zmigrosky, as attorney-in-fact for Charles A. Meloy	03/11/2026
	** 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 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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

How many Diamondback Energy (FANG) shares were sold in this Form 4?

Entities associated with director Charles Meloy sold 15,714 Diamondback Energy common shares. The transactions occurred on March 9–10, 2026 in 13 separate open-market trades at various weighted average prices, as disclosed in the Form 4 filing and its accompanying footnotes.

Who actually sold the Diamondback Energy (FANG) shares reported for Charles Meloy?

The shares were sold by Wolfrock Energy, LLC, not directly by Meloy. Footnotes explain Wolfrock is a Texas LLC whose sole member is CS Ventures, Ltd., which is controlled by Meloy through its general partner, Meloy Management, LLC, giving him indirect control over these holdings.

Were Charles Meloy’s Diamondback Energy (FANG) stock sales pre-planned under Rule 10b5-1?

Yes. The Form 4 states the transactions were effected under a Rule 10b5-1 trading plan. Such plans are established in advance and automatically execute trades based on preset instructions, which generally reduces the informational value of the precise timing of the sales for investors.

At what prices were the Diamondback Energy (FANG) shares sold in this filing?

The 15,714 shares were sold at weighted average prices between about $177.09 and $186.16 per share. Footnotes add that each reported average reflects multiple trades within narrower price ranges, and detailed breakdowns are available to investors upon request.

How many Diamondback Energy (FANG) shares does Charles Meloy still hold after these sales?

After the reported transactions, indirect holdings totaled 966,292 shares and direct holdings totaled 2,275 shares. This indicates the 15,714 shares sold represent a relatively small fraction of Meloy’s overall reported ownership position in Diamondback Energy.

Did this Diamondback Energy (FANG) Form 4 include any option exercises or derivative transactions?

No option exercises or derivative transactions are shown in the provided data. All 13 reportable trades involve non-derivative common stock sales, and the derivative holdings summary is empty, indicating no new derivative exercises or conversions in this particular Form 4.