Diamondback Energy (FANG) EVP Zmigrosky sells 5,000 shares in open market

Rhea-AI Filing Summary

Diamondback Energy, Inc. executive Matt Zmigrosky, EVP and Chief Legal and Administrative Officer, reported an open-market sale of 5,000 shares of Common Stock. The shares were sold at a price of $200.1001 per share. After this transaction, he directly holds 51,392 shares.

Insider Trade Summary

Net Seller: 5,000 shares ($1,000,501)

Net Sell 1 txn

Insider Zmigrosky Matt

Role EVP, Chief Legal and Admin Off

Sold 5,000 shs ($1.00M)

Type	Security	Shares	Price	Value
Sale	Common Stock	5,000	$200.1001	$1.00M

Holdings After Transaction: Common Stock — 51,392 shares (Direct, null)

Footnotes (1)

Key Figures

Shares sold: 5,000 shares Sale price per share: $200.1001 per share Shares owned after transaction: 51,392 shares +1 more

4 metrics

Shares sold 5,000 shares Open-market sale of Common Stock

Sale price per share $200.1001 per share Price for the 5,000-share sale

Shares owned after transaction 51,392 shares Direct ownership following the sale

Net shares sold 5,000 shares Net selling activity in this Form 4

Key Terms

open-market sale, Common Stock, transaction code "S", direct ownership

4 terms

open-market sale financial

"transaction_action: "open-market sale""

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

Common Stock financial

"security_title: "Common Stock""

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

transaction code "S" financial

"transaction_code: "S""

direct ownership financial

"ownership_type: "direct""

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^*

Zmigrosky Matt

(Last) (First) (Middle)

500 WEST TEXAS AVENUE

SUITE 100

(Street)

MIDLAND TEXAS 79701

(City) (State) (Zip)

UNITED STATES

(Country)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/13/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

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	05/13/2026		S		5,000	D	$200.1001	51,392	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	05/14/2026
	** 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.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transaction did Diamondback Energy (FANG) report for Matt Zmigrosky?

Diamondback Energy reported that executive Matt Zmigrosky completed an open-market sale of 5,000 shares of Common Stock. This transaction was disclosed on a Form 4 insider filing and reflects a routine portfolio move by a senior officer.

At what price were the Diamondback Energy (FANG) shares sold by Matt Zmigrosky?

The 5,000 Diamondback Energy shares were sold at a price of $200.1001 per share. This reported sale price comes directly from the Form 4 filing and represents the transaction value used to calculate total proceeds.

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

Following the reported sale, Matt Zmigrosky holds 51,392 shares of Diamondback Energy Common Stock directly. This post-transaction ownership figure is disclosed in the Form 4 and helps investors understand his remaining equity stake.

Was the Diamondback Energy (FANG) insider trade a buy or a sell?

The Form 4 shows a sell transaction, specifically an open-market sale coded as “S.” This indicates that 5,000 shares of Diamondback Energy Common Stock were disposed of rather than acquired in this insider trade.

What role does Matt Zmigrosky hold at Diamondback Energy (FANG)?

Matt Zmigrosky serves as Executive Vice President, Chief Legal and Administrative Officer at Diamondback Energy. His position makes his equity transactions notable, and this role description is explicitly stated in the insider filing.