[Form 4] Diamondback Energy, Inc. Insider Trading Activity

Rhea-AI Filing Summary

Albert Barkmann, Executive Vice President and Chief Engineer of Diamondback Energy, reported a transaction on 09/10/2025 in which 682 shares of common stock were disposed of under code F at a price of $136.29 per share. The filing states these shares were withheld by the issuer to satisfy tax withholding obligations related to the vesting and settlement of the first tranche of time-based restricted stock units originally granted on 09/10/2024. After the withholding, the reporting person beneficially owns 25,168 shares directly. The number of shares withheld was determined using the issuer's closing price on 09/09/2025.

Insights

Corporate Governance Expert

TL;DR: Routine tax-withholding disposition of vested RSUs by an executive; not an active market sale.

The Form 4 discloses a standard withholding of 682 shares to satisfy tax liabilities arising from the vesting of time-based restricted stock units granted one year earlier. The transaction is recorded under code F, indicating withholding to cover taxes rather than an open-market sale, and the reporting person retains a sizable direct holding of 25,168 shares. This is a common compensation-related administrative action and carries no explicit signal of change in insider sentiment.

Securities Analyst

TL;DR: Administrative share withholding reduced the executive's shares; transaction appears immaterial to company valuation.

The reported disposition reflects issuance mechanics for RSU settlement rather than a discretionary divestiture. The sale price per share is listed at $136.29, and the company used the prior trading day's close to calculate withholding. Given the small number of shares withheld relative to outstanding shares, and the retained direct ownership, this filing is routine and unlikely to be material for investors on its own.

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

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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).

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^*

Barkmann Albert

(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)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Exec. VP and Chief Engineer

3. Date of Earliest Transaction (Month/Day/Year)
09/10/2025

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	09/10/2025		F		682(1)	D	$136.29	25,168	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 issuer withheld shares of common stock that would have otherwise been issuable to the reporting person to satisfy the issuer's tax withholding obligations in connection with the vesting and settlement on September 10, 2025 of the first tranche of the time-based restricted stock units granted to the reporting person on September 10, 2024. The number of shares of common stock withheld was determined based on the closing price per share of the issuer's common stock on September 9, 2025.

Remarks:

	/s/ Teresa L. Dick, as attorney-in-fact for Albert Barkmann	09/11/2025
	** 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 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

What did Albert Barkmann report on Form 4 for FANG?

He reported that 682 shares were withheld on 09/10/2025 to satisfy tax withholding related to vested RSUs granted 09/10/2024.

Why were the 682 shares disposed of according to the filing?

The shares were withheld by the issuer to satisfy tax withholding obligations

At what price were the withheld shares recorded?

The transaction price is $136.29 per share, and the number of shares withheld was determined based on the closing price on 09/09/2025.

How many shares does the reporting person own after the transaction?

25,168 shares are reported as beneficially owned directly following the withholding.

What is Albert Barkmann's role at Diamondback Energy (FANG)?

He is Executive Vice President and Chief Engineer and is identified on the form as an officer and director.