Ownership Submission
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

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
Pantermuehl Russell
   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)
VP Reservoir Engineering
(Last)
(First)
(Middle)
500 WEST TEXAS, SUITE 1225		 3. Date of Earliest Transaction (Month/Day/Year)
10/11/2012
(Street)

MIDLAND, TX 79701		 4. If Amendment, Date 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
(City)
(State)
(Zip)
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

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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 Underlying Securities
(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
Restricted Stock Units (1) (1) 10/11/2012   A   34,287     (2)   (2) Common Stock 34,287 $ 0 34,287 D  
Stock Option (right to buy) (3) $ 17.5 (3) 10/11/2012   A   100,000     (3) 08/15/2016(3) Common Stock 100,000 $ 0 100,000 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
Pantermuehl Russell
500 WEST TEXAS
SUITE 1225
MIDLAND, TX 79701		       VP Reservoir Engineering  

Signatures

 /s/ Randall J. Holder, as attorney-in-fact for Russell Pantermuehl   10/15/2012
**Signature of Reporting Person Date

Explanation of Responses:

* 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).
(1) Each restricted stock unit represents a contingent right to receive one share of common stock, par value $0.01 per share (the "Common Stock"), of Diamondback Energy, Inc. (the "Issuer")
(2) 8,572 restricted stock units will be vested on the closing date of the initial public offering of the Issuer (the "IPO"). 25,715 restricted stock units will vest in three remaining approximately equal annual installments beginning on August 15, 2013. All restricted stock units are subject to a lock-up agreement entered into by the reporting person in connection with the IPO.
(3) Options to purchase 25,000 shares of Common Stock will be vested on the closing date of the IPO. Options to purchase 75,000 shares of Common Stock will vest in three remaining approximately equal annual installments beginning on August 15, 2013. All Options are subject to the terms of the reporting person's employment agreement and a lock-up agreement entered into by the reporting person in connection with the IPO.

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