Diamondback Energy (FANG) CFO reports open-market sale of 1,000 shares

Rhea-AI Filing Summary

Diamondback Energy, Inc. Chief Financial Officer and Executive Vice President Jere W. Thompson III reported an open-market sale of 1,000 shares of common stock at an average price of $203.1602 per share. Following this transaction, he directly holds 18,975 shares of Diamondback Energy common stock.

Insider Trade Summary

Net Seller: 1,000 shares ($203,160)

Net Sell 1 txn

Insider Thompson Jere W III

Role CFO, Executive VP

Sold 1,000 shs ($203K)

Type	Security	Shares	Price	Value
Sale	Common Stock	1,000	$203.1602	$203K

Holdings After Transaction: Common Stock — 18,975 shares (Direct, null)

Footnotes (1)

Key Figures

Shares sold: 1,000 shares Sale price: $203.1602 per share Shares held after sale: 18,975 shares +1 more

4 metrics

Shares sold 1,000 shares Open-market sale of common stock

Sale price $203.1602 per share Price for the 1,000-share sale

Shares held after sale 18,975 shares Direct ownership following transaction

Transaction code S Sale in open market or private transaction

Key Terms

open-market sale, Form 4, non-derivative, transaction code "S"

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.

Form 4 regulatory

"reported on a Form 4 as an insider transaction"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

non-derivative financial

"a single non-derivative transaction involving common stock only"

transaction code "S" regulatory

"The Form 4 identifies the transaction code as “S”"

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^*

Thompson Jere W III

(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)
	CFO, Executive VP

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/15/2026

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	05/15/2026		S		1,000	D	$203.1602	18,975	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, as attorney-in-fact for Jere W. Thompson III	05/19/2026
	** 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) disclose for Jere W. Thompson III?

Diamondback Energy disclosed that CFO and Executive Vice President Jere W. Thompson III executed an open-market sale of 1,000 shares of common stock. The transaction was reported on a Form 4 as a sale in the open market or a private transaction.

At what price did the Diamondback Energy (FANG) CFO sell shares in this Form 4?

The CFO sold 1,000 shares of Diamondback Energy common stock at an average price of $203.1602 per share. This figure reflects the per-share transaction price disclosed for the open-market sale reported in the Form 4 filing.

How many Diamondback Energy (FANG) shares does the CFO hold after this reported sale?

After the reported sale, CFO Jere W. Thompson III directly holds 18,975 shares of Diamondback Energy common stock. This post-transaction ownership figure is disclosed in the Form 4 as the total shares following the transaction.

Is the Diamondback Energy (FANG) insider transaction an open-market sale or another type?

The transaction is classified as an open-market sale of common stock. The Form 4 identifies the transaction code as “S” and describes it as a sale in an open market or private transaction, indicating a discretionary disposition of shares.

Does the Diamondback Energy (FANG) Form 4 show any derivative security exercises?

The Form 4 does not report any derivative security exercises for this transaction. The filing lists a single non-derivative transaction involving common stock only, and the derivative summary section is empty for this reporting period.