Diamondback EVP sells 5,000 shares at $210

Diamondback Energy’s EVP Accounting sold 5,000 FANG shares at $210, remaining directly invested.

Rhea-AI Filing Summary

Diamondback Energy, Inc. (FANG) executive Teresa L. Dick, EVP Accounting and Assistant Secretary, reported selling 5,000 shares of common stock on September 15, 2026 in a sale classified as an open market or private transaction at $210.00 per share. After this transaction, she directly holds 75,755 shares of Diamondback Energy common stock. No Rule 10b5-1 trading plan is reported for this sale.

Insider Trade Summary

Net Seller: 5,000 shares

Net Sell 1 txn

Insider Dick Teresa L.

Role EVP Accounting, Assist. Sec.

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 — 75,755 shares (Direct)

Key Figures

Shares sold: 5,000 shares Sale price per share: $210.00 per share Shares held after transaction: 75,755 shares +1 more

4 metrics

Shares sold 5,000 shares Common stock sale reported for September 15, 2026

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

Shares held after transaction 75,755 shares Direct ownership after the September 15, 2026 sale

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

Key Terms

Rule 10b5-1, open market, non-derivative

3 terms

Rule 10b5-1 regulatory

"No Rule 10b5-1 trading plan is reported for this sale"

Rule 10b5-1 is a regulation that allows company insiders to buy or sell their shares at predetermined times, even if they have access to non-public information. It acts like setting a schedule in advance for transactions, helping prevent accusations of unfair trading. This rule provides a way for insiders to plan trades transparently, giving investors confidence that these transactions are not based on hidden information.

open market market

"Sale in open market or private transaction"

An open market is a system where buying and selling of goods, services, or financial assets happen freely without restrictions or special controls. For investors, it means they can trade assets easily and quickly, which helps determine fair prices based on supply and demand. This environment encourages transparency and competition, making it easier to buy or sell with confidence.

non-derivative financial

"the transaction type is listed as non-derivative"

FAQ

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

What insider transaction did FANG report for Teresa L. Dick?

Diamondback Energy reported that Teresa L. Dick sold 5,000 shares of common stock on September 15, 2026 in a sale classified as an open market or private transaction at $210.00 per share.

How many Diamondback Energy (FANG) shares does Teresa L. Dick hold after the sale?

After the reported sale, Teresa L. Dick directly holds 75,755 shares of Diamondback Energy common stock.

At what price were the Diamondback Energy (FANG) shares sold in this Form 4?

The 5,000 Diamondback Energy common shares were sold at a reported price of $210.00 per share, classified as a sale in an open market or private transaction.

Was the Teresa L. Dick sale of FANG shares under a Rule 10b5-1 plan?

No. The Form 4 indicates the Rule 10b5-1 checkbox is not checked, so no Rule 10b5-1 trading plan is reported for this transaction.

What is Teresa L. Dick’s role at Diamondback Energy (FANG)?

The reporting person, Teresa L. Dick, is identified as EVP Accounting, Assist. Sec. at Diamondback Energy, Inc.

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

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Available on EDGAR 09/17/2026 - 04:04 PM Accepted by SEC EDGAR 09/17/2026 - 04:03 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^*

Dick Teresa L.

(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 Accounting, Assist. Sec.

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/15/2026

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	09/15/2026		S		5,000	D	$210	75,755	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 Teresa L. Dick	09/17/2026
	** 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)