Diamondback Energy (FANG) EVP Zmigrosky sells 5,000 common shares at $210

Rhea-AI Filing Summary

Diamondback Energy, Inc. executive Matt Zmigrosky reported an open-market sale of company stock. On June 3, 2026, the EVP, Chief Legal and Administrative Officer sold 5,000 shares of Common Stock at $210.00 per share.

After this transaction, he directly holds 41,392 shares. This filing reflects a single sale and does not show any related option exercises or derivative positions.

Insider Trade Summary

Net Seller: 5,000 shares ($1,050,000)

Net Sell 1 txn

Insider Zmigrosky Matt

Role EVP, Chief Legal and Admin Off

Sold 5,000 shs ($1.05M)

Type	Security	Shares	Price	Value
Sale	Common Stock	5,000	$210.00	$1.05M

Holdings After Transaction: Common Stock — 41,392 shares (Direct, null)

Footnotes (1)

Key Figures

Shares sold: 5,000 shares Sale price per share: $210.00 per share Shares held after sale: 41,392 shares +1 more

4 metrics

Shares sold 5,000 shares Open-market sale of common stock on June 3, 2026

Sale price per share $210.00 per share Price for the 5,000 common shares sold

Shares held after sale 41,392 shares Direct ownership following the reported transaction

Net buy/sell shares -5,000 shares Net activity across all reported transactions in this Form 4

Key Terms

open-market sale, Common Stock, non-derivative, total shares following transaction

4 terms

open-market sale financial

"transaction_action is described as an open-market sale of common stock"

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 identifies the security as 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.

non-derivative financial

"transaction_type is listed as non-derivative for this trade"

total shares following transaction financial

"field shows 41,392 as total shares following transaction"

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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^*

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)
06/03/2026

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	06/03/2026		S		5,000	D	$210	41,392	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	06/04/2026
	** 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 did Matt Zmigrosky report in this Diamondback Energy (FANG) Form 4?

Matt Zmigrosky reported selling 5,000 shares of Diamondback Energy common stock. The open-market sale occurred at $210.00 per share, and following the transaction he directly holds 41,392 shares, according to the Form 4 filing data provided.

What price and number of Diamondback Energy (FANG) shares were sold?

The Form 4 shows a sale of 5,000 Diamondback Energy common shares at $210.00 each. This was classified as an open-market sale transaction, reflecting a single non-derivative trade by the reporting executive officer on the reported date.

What is Matt Zmigrosky’s role at Diamondback Energy (FANG) in this Form 4?

The reporting person, Matt Zmigrosky, is identified as an officer of Diamondback Energy, serving as EVP, Chief Legal and Administrative Officer. The Form 4 links this insider role to the reported open-market sale of common stock shares.

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

After selling 5,000 shares, Matt Zmigrosky directly holds 41,392 Diamondback Energy common shares. This post-transaction ownership figure comes from the Form 4’s total shares following transaction field for his directly held non-derivative stock position.

Does this Diamondback Energy (FANG) Form 4 include any option exercises or derivatives?

The filing data shows only a non-derivative open-market stock sale and no derivative transactions. The derivative summary is empty and exercise-related counts are zero, indicating no reported option exercises or other derivative activity in this Form 4.