FORM 4 [ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).         
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES
                                                                                  
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
                      
1. Name and Address of Reporting Person * Wesson Daniel N 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)
Exec. VP - Operations
(Last)         (First)         (Middle)
500 WEST TEXAS, SUITE 1200
3. Date of Earliest Transaction (MM/DD/YYYY)
3/1/2021
(Street)
MIDLAND, TX 79701
(City)       (State)       (Zip)
4. If Amendment, Date Original Filed (MM/DD/YYYY)
 
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. Trans. Date 2A. Deemed Execution Date, if any 3. Trans. 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  3/1/2021    A    7762 (1) A $0  32241  D   
Common Stock  3/1/2021    A    4462 (2) A $0  36703  D   
Common Stock  3/1/2021    F    1806 (3) D $69.28  34897  D   
Common Stock  3/1/2021    F    1167 (4) D $69.28  33730  D   
Common Stock  3/1/2021    F    1019 (5) D $69.28  32711  D   
Common Stock  3/1/2021    F    520 (6) D $69.28  32191  D   

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 3)
2. Conversion or Exercise Price of Derivative Security 3. Trans. Date 3A. Deemed Execution Date, if any 4. Trans. 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 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 of Derivative Security: 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, 2021.
(2)  These securities are performance-based restricted stock units for the performance period from January 1, 2018 to December 31, 2020 that were granted under the issuer's equity incentive plan on March 12, 2018. All of these performance-based restricted stock units vested as of December 31, 2020 upon certification by the issuer's compensation committee of the applicable performance conditions on February 23, 2021.
(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 12, 2018 and vested upon certification by the issuer's compensation committee on February 23, 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 26, 2021.
(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, 2021 of the second tranche of the time-based restricted stock units granted to the reporting person on March 1, 2020. 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 26, 2021.
(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, 2021 of the first tranche of the time-based restricted stock units granted to the reporting person on March 1, 2020. 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 26, 2021.
(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, 2021 of the third tranche of the time-based restricted stock units granted to the reporting person on March 1, 2019. 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 26, 2021.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director 10% Owner Officer Other
Wesson Daniel N
500 WEST TEXAS
SUITE 1200
MIDLAND, TX 79701


Exec. VP - Operations

Signatures
/s/ Teresa L. Dick as attorney-in-fact for Daniel N. Wesson 3/3/2021
**Signature of Reporting Person Date