Director Rebecca Klein (FANG) granted 982 RSUs in Diamondback equity award

Rhea-AI Filing Summary

KLEIN REBECCA A reported acquisition or exercise transactions in this Form 4 filing.

Diamondback Energy director Rebecca A. Klein received an equity grant rather than buying shares on the market. She was awarded 982 restricted stock units (RSUs), each representing a contingent right to one share of common stock at a price of $0.00 per unit.

The RSUs were granted as her annual non-employee director award under Diamondback’s equity incentive plan and will vest on the earlier of the one-year anniversary of the grant date and the date of the company’s 2027 annual meeting of stockholders. Following this award, Klein directly holds 6,129 shares of Diamondback Energy common stock.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider KLEIN REBECCA A

Role null

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	982	$0.00	--

Holdings After Transaction: Common Stock — 6,129 shares (Direct, null)

Footnotes (1)

1. [object Object]

Key Figures

RSUs granted: 982 units Shares after transaction: 6,129 shares RSU-to-share ratio: 1 unit : 1 share +1 more

4 metrics

RSUs granted 982 units Annual non-employee director grant to Rebecca A. Klein

Shares after transaction 6,129 shares Director’s direct holdings following RSU award

RSU-to-share ratio 1 unit : 1 share Each restricted stock unit equals one common share

Par value per share $0.01 per share Common stock underlying the restricted stock units

Key Terms

restricted stock units, equity incentive plan, non-employee director grant, annual meeting of stockholders

4 terms

restricted stock units financial

"These securities are restricted stock units, each representing a contingent right to receive one share..."

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

equity incentive plan financial

"...granted to Ms. Klein as an annual non-employee director grant under the issuer's equity incentive plan..."

An equity incentive plan is a program that gives employees, executives or directors the right to receive company stock or options to buy stock as part of their pay. Think of it as offering slices of future company profit to motivate people to boost long‑term performance; for investors it matters because it can align employee goals with shareholder value but also increases the number of shares outstanding, which can dilute existing ownership.

non-employee director grant financial

"These restricted stock units were granted to Ms. Klein as an annual non-employee director grant..."

annual meeting of stockholders financial

"...will vest on the earlier of the one-year anniversary of the date of grant and the date of the 2027 annual meeting of stockholders..."

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^*

KLEIN REBECCA A

(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
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/20/2026

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	05/20/2026		A		982(1)	A	$0	6,129	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. 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 to Ms. Klein as an annual non-employee director grant under the issuer's equity incentive plan and will vest on the earlier of the one-year anniversary of the date of grant and the date of the 2027 annual meeting of stockholders of the issuer.

Remarks:

	/s/ Matt Zmigrosky, as attorney-in-fact for Rebecca A. Klein	05/21/2026
	** 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 Diamondback Energy (FANG) director Rebecca A. Klein report in this Form 4?

Rebecca A. Klein reported receiving 982 restricted stock units as an equity award. Each unit represents a contingent right to one Diamondback Energy common share, increasing her direct holdings to 6,129 shares after the grant.

Is Rebecca A. Klein buying or selling Diamondback Energy (FANG) stock in this filing?

She is not buying or selling shares on the open market in this filing. The Form 4 records a grant of 982 restricted stock units awarded as compensation under Diamondback Energy’s equity incentive plan.

How many Diamondback Energy (FANG) shares does Rebecca A. Klein hold after this grant?

After this equity award, Rebecca A. Klein directly holds 6,129 shares of Diamondback Energy common stock. This total reflects her previous holdings plus the 982 restricted stock units reported in the current Form 4 filing.

When do Rebecca A. Klein’s new Diamondback Energy (FANG) RSUs vest?

The 982 restricted stock units vest on the earlier of two dates: the one-year anniversary of the grant date or the date of Diamondback Energy’s 2027 annual meeting of stockholders, subject to the terms of the equity incentive plan.

What type of compensation did Diamondback Energy (FANG) grant to Rebecca A. Klein?

Diamondback Energy granted 982 restricted stock units to Rebecca A. Klein as an annual non-employee director grant. Each RSU represents a contingent right to receive one share of common stock with a par value of $0.01 per share.