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 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 *
MEH SUB LLC
  2. Issuer Name and Ticker or Trading Symbol
MAMMOTH ENERGY SERVICES, INC. [TUSK]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
__X__ Director __X__ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
(Last)
(First)
(Middle)
C/O WEXFORD CAPITAL LP, 777 SOUTH FLAGLER DRIVE, SUITE 602 EAST
3. Date of Earliest Transaction (Month/Day/Year)
07/30/2018
(Street)

WEST PALM BEACH, FL 33401
4. If Amendment, Date Original Filed(Month/Day/Year)
6. Individual or Joint/Group Filing(Check Applicable Line)
___ Form filed by One Reporting Person
_X_ 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
Restricted Stock Units (1) (2)               12,235 I See Footnote (1) (2)
Common Stock 07/30/2018   S   266,026 (3) D $ 38.01 (3) 21,978,893 D (4)  

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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

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
MEH SUB LLC
C/O WEXFORD CAPITAL LP
777 SOUTH FLAGLER DRIVE, SUITE 602 EAST
WEST PALM BEACH, FL 33401
  X   X    
WEXFORD CAPITAL LP
777 SOUTH FLAGLER DRIVE, SUITE 602 EAST
WEST PALM BEACH, FL 33401
  X   X    
Wexford GP LLC
C/O WEXFORD CAPITAL LP
777 SOUTH FLAGLER DRIVE, SUITE 602 EAST
WEST PALM BEACH, FL 44302
  X   X    
DAVIDSON CHARLES E
C/O WEXFORD CAPITAL LP
777 SOUTH FLAGLER DRIVE, SUITE 602 EAST
WEST PALM BEACH, FL 33401
  X   X    
JACOBS JOSEPH
C/O WEXFORD CAPITAL LP
777 SOUTH FLAGLER DRIVE, SUITE 602 EAST
WEST PALM BEACH, FL 33401
  X   X    

Signatures

 MEH SUB LLC, By: Arthur Amron, Vice President and Assistant Secretary   08/01/2018
**Signature of Reporting Person Date

 Wexford Capital LP, By: Wexford GP LLC, its general partner, By: Arthur Amron, Vice President and Assistant Secretary   08/01/2018
**Signature of Reporting Person Date

 Wexford GP LLC, By: Arthur Amron, Vice President and Assistant Secretary   08/01/2018
**Signature of Reporting Person Date

 Charles E. Davidson   08/01/2018
**Signature of Reporting Person Date

 Joseph M. Jacobs   08/01/2018
**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) Marc McCarthy ("McCarthy"), a director of Mammoth Energy Services, Inc. (the "Issuer") and an employee of Wexford Capital LP ("Wexford Capital"), was granted an aggregate of 12,235 restricted stock units ("RSUs") under the Issuer's 2016 Equity Incentive Plan, subject to terms and conditions set forth in the Plan. 6,667 RSUs were granted on October 19, 2016, as reported on the Form 4 filed with the U.S. Securities and Exchange Commission (the "SEC") on October 21, 2016, 2,913 RSUs were granted on February 2, 2018, as reported on the Form 4 filed with the SEC on February 6, 2018, and 2,655 RSUs were granted on June 7, 2018, as reported on the Form 4 filed with the SEC on June 11, 2018. Vesting schedules for these RSUs are set forth in each respective Form 4.
(2) The RSUs were assigned to Wexford Capital under the terms of McCarthy's employment with Wexford. The Reporting Persons are directors by deputization because McCarthy serves as a director of the Issuer. Each RSU represents a contingent right to receive one share of common stock of the Issuer.
(3) These shares of common stock of the Issuer were sold by MEH SUB LLC ("MEH") to the underwriters in a secondary public offering of the common stock at a price of $38.01 per share, in connection with the underwriters' partial exercise of their option to purchase additional shares of the Issuer's common stock from MEH and the other selling stockholder granted by such selling stockholders in the previously reported June 2018 secondary offering (the "Option Exercise"). The Option Exercise closed on July 30, 2018. Other material terms of the Offering are described in the Form 424B5, dated June 19, 2018, filed by the Issuer with the SEC on June 28, 2018.
(4) Wexford Capital may, by reason of its status as manager of MEH, be deemed to own beneficially the securities of which MEH possesses beneficial ownership. Wexford GP LLC ("Wexford GP") may, as the General Partner of Wexford Capital, be deemed to own beneficially the securities of which MEH possesses beneficial ownership. Each of Charles E. Davidson ("Davidson") and Joseph M. Jacobs ("Jacobs") may, by reason of his status as a controlling person of Wexford GP, be deemed to own beneficially the securities of which MEH possesses beneficial ownership. Each of Wexford Capital, Wexford GP, Davidson and Jacobs share the power to vote and to dispose of the securities beneficially owned by MEH. Each of Wexford Capital, Wexford GP, Davidson and Jacobs disclaim beneficial ownership of the securities owned by MEH and this report shall not be deemed as an admission that they are the beneficial owners of such securities, except to the extent of any pecuniary interests therein.

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