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

Rhea-AI Filing Summary

Diamondback Energy, Inc. executive vice president and chief engineer Albert Barkmann reported an open-market sale of 4,000 shares of common stock at $182.90 per share on March 13, 2026.

After this transaction, he directly owns 27,571 shares, indicating he retains a substantial equity stake in the company.

Insider Trade Summary

Net Seller: 4,000 shares ($731,600)

Net Sell 1 txn

Insider Barkmann Albert

Role Exec. VP and Chief Engineer

Sold 4,000 shs ($732K)

Type	Security	Shares	Price	Value
Sale	Common Stock	4,000	$182.90	$732K

Holdings After Transaction: Common Stock — 27,571 shares (Direct)

Footnotes (1)

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Form 4 Insider Transactions: What Each Field Means →

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

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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)
03/13/2026

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	03/13/2026		S		4,000	D	$182.9	27,571	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:

Remarks:

	/s/ Matt Zmigrosky, as attorney-in-fact for Albert Barkmann	03/17/2026
	** 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

What insider transaction did Diamondback Energy (FANG) report for Albert Barkmann?

Diamondback Energy reported that executive vice president and chief engineer Albert Barkmann sold 4,000 shares of common stock in an open-market transaction. The sale was disclosed in a Form 4 insider filing, providing transparency into recent executive share activity.

At what price did Albert Barkmann sell Diamondback Energy (FANG) shares?

Albert Barkmann sold 4,000 shares of Diamondback Energy common stock at $182.90 per share. This price reflects the execution level for that specific open-market sale as reported in the Form 4 insider trading disclosure.

How many Diamondback Energy (FANG) shares does Albert Barkmann own after the sale?

Following the sale, Albert Barkmann directly owns 27,571 shares of Diamondback Energy common stock. This post-transaction holding shows he maintains a meaningful ongoing ownership position despite the recent 4,000-share disposition.

What type of insider transaction did Albert Barkmann execute in Diamondback Energy (FANG) stock?

The filing classifies the transaction as an open-market sale of common stock, coded “S” on Form 4. This indicates shares were sold into the market rather than being part of a grant, option exercise, gift, or tax-withholding event.

What does the Form 4 net share activity show for Diamondback Energy (FANG)?

The Form 4 transaction summary shows a net-sell direction of 4,000 shares. There were no reported purchases, option exercises, gifts, or tax-withholding entries in this filing, making it a straightforward, single open-market sale event.