FANG insider Matt Zmigrosky reports 3,500-share stock sale

Rhea-AI Filing Summary

Diamondback Energy, Inc. (FANG) executive vice president and chief legal and administrative officer Matt Zmigrosky reported a routine stock sale. On 11/14/2025, he sold 3,500 shares of Diamondback Energy common stock at a price of $148.1801 per share. After this transaction, he beneficially owned 63,534 shares of the company’s common stock, which he holds directly.

Insider Trade Summary

Net Seller: 3,500 shares

Net Sell 1 txn

Insider Zmigrosky Matt

Role EVP, Chief Legal and Admin Off

Sold 3,500 shs ($519K)

Type	Security	Shares	Price	Value
Sale	Common Stock	3,500	$148.1801	$519K

Holdings After Transaction: Common Stock — 63,534 shares (Direct)

FAQ

What insider transaction did Diamondback Energy (FANG) report in this Form 4?

The filing reports that executive vice president and chief legal and administrative officer Matt Zmigrosky sold 3,500 shares of Diamondback Energy common stock.

On what date did the Diamondback Energy (FANG) insider stock sale occur?

The reported sale of Diamondback Energy common stock by Matt Zmigrosky took place on 11/14/2025.

At what price were the Diamondback Energy (FANG) shares sold in this insider trade?

The 3,500 shares of Diamondback Energy common stock were sold at a price of $148.1801 per share.

How many Diamondback Energy (FANG) shares does the insider own after the transaction?

Following the reported sale, Matt Zmigrosky beneficially owned 63,534 shares of Diamondback Energy common stock, held directly.

What is the role of the reporting person at Diamondback Energy (FANG)?

The reporting person, Matt Zmigrosky, serves as EVP, Chief Legal and Admin Officer of Diamondback Energy, Inc.

Is this Diamondback Energy (FANG) Form 4 filed for one reporting person or multiple?

The Form 4 is indicated as being filed by one reporting person, namely Matt Zmigrosky.

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Form 4 Insider Transactions: What Each Field Means →

Accepted by SEC EDGAR 11/18/2025 - 04:01 PM Learn about SEC filing dates

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^*

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)
11/14/2025

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	11/14/2025		S		3,500	D	$148.1801	63,534	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	11/18/2025
	** 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.