Diamondback EVP gets 3,966-share stock award

Diamondback Energy EVP-Operations Chad McAllaster reported equity compensation and related tax-withholding transactions in common stock.

Accepted by SEC EDGAR 03/03/2026 - 05:51 PM EST Learn about SEC filing dates

Rhea-AI Filing Summary

Diamondback Energy EVP-Operations Chad McAllaster reported equity compensation and related tax-withholding transactions in common stock. He acquired 3,966 restricted stock units on March 1, 2026 at a stated price of $0.00 per share under the company’s equity incentive plan; these units vest in three equal installments beginning March 1, 2026.

To cover tax obligations on vesting of earlier time-based awards, the issuer withheld 448 shares at $174.08 per share tied to a March 1, 2025 grant and 521 shares at $174.08 per share tied to a March 1, 2026 grant. After these transactions, McAllaster directly holds 5,889 shares of common stock, which are jointly owned with his spouse.

Insider Trade Summary

3 transactions reported

Mixed 3 txns

Insider McAllaster Chad

Role EVP-Operations

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	3,966	$0.00	$0.00
Exercise Price or Tax Liability	Common Stock	448	$174.08	$78K
Exercise Price or Tax Liability	Common Stock	521	$174.08	$91K

Holdings After Transaction: Common Stock — 5,889 shares (Direct)

Holdings Before and After: Common Stock, 2,892 to 5,889 shares (Direct)

Footnotes (4)

1. F1. These securities are restricted stock units, each representing a contingent right to receive one share of common stock, par value $0.01 per share, of the issuer. These restricted stock units were granted under the issuer's equity incentive plan and will vest in three equal installments beginning on March 1, 2026.
2. F2. These shares of common stock are jointly owned by the reporting person and his spouse.
3. F3. The issuer withheld shares of common stock that would have otherwise been issuable to the reporting person to satisfy the issuer's tax withholding obligations in connection with the vesting and settlement on March 1, 2026 of the second tranche of the time-based restricted stock units granted to the reporting person on March 1, 2025. The number of shares of common stock withheld was determined based on the closing price per share of the issuer's common stock on February 27, 2026.
4. F4. The issuer withheld shares of common stock that would have otherwise been issuable to the reporting person to satisfy the issuer's tax withholding obligations in connection with the vesting and settlement on March 1, 2026 of the first tranche of the time-based restricted stock units granted to the reporting person on March 1, 2026. The number of shares of common stock withheld was determined based on the closing price per share of the issuer's common stock on February 27, 2026.

FAQ

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

What insider transactions did FANG EVP Chad McAllaster report on March 1, 2026?

Chad McAllaster reported a grant of 3,966 restricted stock units and two tax-withholding dispositions totaling 969 shares. These involved Diamondback Energy common stock and were executed in connection with vesting of time-based equity awards on March 1, 2026.

How many Diamondback Energy (FANG) shares did the EVP acquire in this Form 4?

He acquired 3,966 restricted stock units, each representing one share of Diamondback Energy common stock. The units were granted under the company’s equity incentive plan and will vest in three equal installments beginning March 1, 2026, subject to the plan’s usual conditions.

What were the tax-withholding transactions disclosed by Diamondback Energy EVP in this filing?

The issuer withheld 448 shares and 521 shares of common stock, both at $174.08 per share, to satisfy tax withholding obligations. These withholdings related to vesting of time-based restricted stock unit tranches on March 1, 2026 from grants made on March 1, 2025 and March 1, 2026.

Did the Diamondback Energy EVP sell FANG shares in the open market?

The filing shows tax-withholding dispositions coded as “F,” not open-market sales. Shares were withheld by the issuer to cover tax obligations upon vesting of restricted stock units, using the February 27, 2026 closing price to determine the number of shares withheld.

How many Diamondback Energy shares does the EVP own after these transactions?

After the reported grant and tax-withholding dispositions, Chad McAllaster directly owns 5,889 shares of Diamondback Energy common stock. According to the footnotes, these shares are jointly owned by the reporting person and his spouse, reflecting shared ownership of the position.

At what price were the FANG shares withheld for tax purposes in this Form 4?

Both tax-withholding transactions used a price of $174.08 per share. This price was based on the February 27, 2026 closing price of Diamondback Energy common stock and determined how many shares were withheld to satisfy tax obligations on vesting restricted stock units.

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

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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^*

McAllaster Chad

(Last) (First) (Middle)

500 WEST TEXAS AVENUE

SUITE 100

(Street)

MIDLAND TX 79701

(City) (State) (Zip)

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-Operations

3. Date of Earliest Transaction (Month/Day/Year)
03/01/2026

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

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

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

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	03/01/2026		A		3,966(1)	A	$0	6,858	D(2)
Common Stock	03/01/2026		F		448(3)	D	$174.08	6,410	D(2)
Common Stock	03/01/2026		F		521(4)	D	$174.08	5,889	D(2)

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. These securities are restricted stock units, each representing a contingent right to receive one share of common stock, par value $0.01 per share, of the issuer. These restricted stock units were granted under the issuer's equity incentive plan and will vest in three equal installments beginning on March 1, 2026.

2. These shares of common stock are jointly owned by the reporting person and his spouse.

3. The issuer withheld shares of common stock that would have otherwise been issuable to the reporting person to satisfy the issuer's tax withholding obligations in connection with the vesting and settlement on March 1, 2026 of the second tranche of the time-based restricted stock units granted to the reporting person on March 1, 2025. The number of shares of common stock withheld was determined based on the closing price per share of the issuer's common stock on February 27, 2026.

4. The issuer withheld shares of common stock that would have otherwise been issuable to the reporting person to satisfy the issuer's tax withholding obligations in connection with the vesting and settlement on March 1, 2026 of the first tranche of the time-based restricted stock units granted to the reporting person on March 1, 2026. The number of shares of common stock withheld was determined based on the closing price per share of the issuer's common stock on February 27, 2026.

Remarks:

	/s/ Matt Zmigrosky, as attorney-in-fact for Chad McAllaster	03/03/2026
	** 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.
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