# EDGAR Filing Document

**Accession Number:** 0001539838
**File Stem:** 0001539838-23-000029
**Filing Date:** 2023-3
**Character Count:** 8648
**Document Hash:** 4a80dc9c604c0af4901e5facb88ec22d
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001539838-23-000029.hdr.sgml**: 20230303

**ACCESSION NUMBER**: 0001539838-23-000029

**CONFORMED SUBMISSION TYPE**: 4

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20230301

**FILED AS OF DATE**: 20230303

**DATE AS OF CHANGE**: 20230303

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Zmigrosky Matt
- **CENTRAL INDEX KEY:** 0001767328

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-35700
- **FILM NUMBER:** 23703825

**MAIL ADDRESS:**
- **STREET 1:** 500 WEST TEXAS AVENUE, SUITE 1200
- **CITY:** MIDLAND
- **STATE:** TX
- **ZIP:** 79701
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Diamondback Energy, Inc.
- **CENTRAL INDEX KEY:** 0001539838
- **STANDARD INDUSTRIAL CLASSIFICATION:** CRUDE PETROLEUM & NATURAL GAS [1311]
- **IRS NUMBER:** 000000000
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** 500 WEST TEXAS
- **STREET 2:** SUITE 1200
- **CITY:** MIDLAND
- **STATE:** TX
- **ZIP:** 79701
- **BUSINESS PHONE:** 405-463-6900

**MAIL ADDRESS:**
- **STREET 1:** 500 WEST TEXAS
- **STREET 2:** SUITE 1200
- **CITY:** MIDLAND
- **STATE:** TX
- **ZIP:** 79701

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## FORM 4

### STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

[ ] 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**<sup>*</sup><br>Zmigrosky Matt<br><sub>(Last) (First) (Middle)</sub><br>500 WEST TEXAS AVENUE, SUITE 100<br><sub>(Street)</sub><br>MIDLAND, TX 79701<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2023-03-01 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director [ ] 10% Owner<br>[X] Officer (give title below) [ ] Other (specify below)<br>_EVP, Chief Legal and Admin Off_ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>Diamondback Energy, Inc. [ FANG ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[X] Form filed by One Reporting Person<br>[ ] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | 3. Transaction Code (V) | 3. Transaction Code (V) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | Code | V | Amount | (A) or (D) | Price | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| Common Stock | 2023-03-01 |  | A |  | 7144<sup>(1)</sup> | A | $0 | 30767 | D |  |
| Common Stock | 2023-03-01 |  | A |  | 13663<sup>(2)</sup> | A | $0 | 44430 | D |  |
| Common Stock | 2023-03-01 |  | F |  | 5395<sup>(3)</sup> | D | $140.58 | 39035 | D |  |
| Common Stock | 2023-03-01 |  | F |  | 1087<sup>(4)</sup> | D | $140.58 | 37948 | D |  |
| Common Stock | 2023-03-01 |  | F |  | 808<sup>(5)</sup> | D | $140.58 | 37140 | D |  |
| Common Stock | 2023-03-01 |  | F |  | 938<sup>(6)</sup> | D | $140.58 | 36202 | D |  |

---

## Table II - Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | 4. Transaction Code (V) | 4. Transaction Code (V) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 6. Date Exercisable and Expiration Date | 6. Date Exercisable and Expiration Date | 7. Title and Amount of Underlying Securities | 7. Title and Amount of Underlying Securities | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | Code | V | (A) | (D) | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

---

### Footnotes:

(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, 2023.

(2) These securities are performance-based restricted stock units for the performance period from January 1, 2020 to December 31, 2022 that were granted under the issuer's equity incentive plan on March 1, 2020. All of these performance-based restricted stock units vested as of December 31, 2022 upon certification by the issuer's compensation committee of the applicable performance conditions on February 6, 2023.

(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 of the performance-based restricted stock units granted on March 1, 2020 and vested upon certification by the issuer's compensation committee on February 6, 2023. 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 28, 2023.

(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, 2023 of the third tranche of the time-based restricted stock units granted to the reporting person on March 1, 2021. 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 28, 2023.

(5) 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, 2023 of the second tranche of the time-based restricted stock units granted to the reporting person on March 1, 2022. 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 28, 2023.

(6) 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, 2023 of the first tranche of the time-based restricted stock units granted to the reporting person on March 1, 2023. 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 28, 2023.

**Signature:** /s/ Matt Zmigrosky  
**Date:** 2023-03-03

### Remarks:

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.**