Diamondback CEO sells 5,000 shares at ~$202 each

Diamondback Energy, Inc. director and Chief Executive Officer Matthew Kaes Van't Hof reported selling 5,000 shares of common stock on 2026-08-11 in a sale categorized as an open market or private transaction.

Rhea-AI Filing Summary

Diamondback Energy, Inc. director and Chief Executive Officer Matthew Kaes Van't Hof reported selling 5,000 shares of common stock on 2026-08-11 in a sale categorized as an open market or private transaction. The shares were sold at a weighted average price of $202.4632 per share, with individual sale prices ranging from $202.325 to $202.625 per share. Following this transaction, Van't Hof directly holds 125,940 shares of Diamondback Energy common stock.

Insider Trade Summary

Net Seller: 5,000 shares

Net Sell 1 txn

Insider Van't Hof Matthew Kaes

Role Chief Executive Officer

Sold 5,000 shs ($1.01M)

Type	Security	Shares	Price	Value
Sale	Common Stock F1	5,000	$202.4632	$1.01M

Holdings After Transaction: Common Stock — 125,940 shares (Direct)

Footnotes (1)

1. F1. The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $202.325 per share to $202.625 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.

Key Figures

Shares sold: 5,000 shares Weighted average sale price: $202.4632 per share Price range of sales: $202.325 to $202.625 per share +1 more

4 metrics

Shares sold 5,000 shares Common stock sale reported by CEO on 2026-08-11

Weighted average sale price $202.4632 per share Average price for 5,000 shares sold in multiple transactions

Price range of sales $202.325 to $202.625 per share Range of individual sale prices within the reported transaction

Shares held after transaction 125,940 shares Direct holdings of CEO following the reported sale

Key Terms

weighted average sale price, open market or private transaction, beneficial ownership

3 terms

weighted average sale price financial

"The price reported in Column 4 is a weighted average sale price."

open market or private transaction financial

"transaction_code_description: Sale in open market or private transaction"

beneficial ownership financial

"full information regarding the number of shares sold at each separate price within"

Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did Diamondback Energy (FANG) report?

Diamondback Energy reported that CEO and director Matthew Kaes Van't Hof sold 5,000 shares of common stock on 2026-08-11 in an open market or private transaction.

At what price did the Diamondback Energy (FANG) CEO sell shares?

The CEO's 5,000 Diamondback Energy shares were sold at a weighted average price of $202.4632 per share, with individual prices between $202.325 and $202.625 per share.

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

After the reported sale, CEO Matthew Kaes Van't Hof directly holds 125,940 shares of Diamondback Energy common stock, as disclosed in the Form 4 filing.

Was the Diamondback Energy (FANG) CEO’s share sale under a Rule 10b5-1 plan?

The filing indicates the Rule 10b5-1 checkbox is not checked, and there is no footnote stating that the 5,000-share sale was executed under a 10b5-1 trading plan.

How is the sale price range described in the Diamondback Energy (FANG) Form 4?

The Form 4 states the reported price is a weighted average sale price. The 5,000 shares were sold in multiple transactions at prices ranging from $202.325 to $202.625 per share.

AI-generated analysis. How Rhea-AI works. Not financial advice.

Form 4 Insider Transactions: What Each Field Means →

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Available on EDGAR 08/12/2026 - 04:01 PM Accepted by SEC EDGAR 08/12/2026 - 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^*

Van't Hof Matthew Kaes

(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)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Executive Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/11/2026

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	08/11/2026		S		5,000	D	$202.4632(1)	125,940	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 $202.325 per share to $202.625 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, as attorney-in-fact for Matthew Kaes Van't Hof	08/12/2026
	** 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)