Diamondback (FANG) EVP Zmigrosky sells 20,899 shares at $180.0027

Rhea-AI Filing Summary

Diamondback Energy EVP Matt Zmigrosky reported an open-market sale of 20,899 shares of Common Stock on March 13, 2026, at a weighted average price of $180.0027 per share. After this transaction, he directly holds 60,493 shares. The sale was executed in multiple trades between $180.00 and $180.085 per share.

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^*

Zmigrosky Matt

(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)
	EVP, Chief Legal and Admin Off

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		20,899	D	$180.0027(1)	60,493	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 price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $180.00 per share to $180.085 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.

Remarks:

	/s/ Matt Zmigrosky	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 Matt Zmigrosky?

Diamondback Energy reported that EVP Matt Zmigrosky sold 20,899 shares of Common Stock. The sale occurred on March 13, 2026, as an open-market transaction at a weighted average price of $180.0027 per share, executed across multiple trades within a narrow price range.

At what prices were Matt Zmigrosky’s Diamondback Energy (FANG) shares sold?

The reported weighted average sale price was $180.0027 per share. According to the disclosure footnote, individual trades were executed in multiple transactions at prices ranging from $180.00 to $180.085 per share, and detailed trade breakdowns are available upon request from the company or regulators.

How many Diamondback Energy (FANG) shares does Matt Zmigrosky hold after this sale?

After the reported sale, Matt Zmigrosky directly owns 60,493 shares of Diamondback Energy Common Stock. This figure reflects his remaining holdings immediately following the 20,899-share open-market disposition disclosed in the Form 4 insider transaction filing.

What type of insider transaction did Diamondback Energy (FANG) disclose for Matt Zmigrosky?

The transaction was classified as an open-market sale of non-derivative Common Stock. The Form 4 uses transaction code “S,” indicating a sale in the open market or a private transaction, rather than an option exercise, tax withholding, gift, or derivative-related event.

How many shares in total did Matt Zmigrosky sell in this Diamondback Energy (FANG) Form 4?

The Form 4 shows that Matt Zmigrosky sold 20,899 shares of Diamondback Energy Common Stock. The transactionSummary section also confirms a single sell transaction totaling 20,899 shares, with no reported purchases, exercises, gifts, or tax-withholding dispositions during this filing period.