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 or Section 30(h) of the Investment Company Act of 1940

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3235-0287

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(Print or Type Responses)

1. Name and Address of Reporting Person ^*

GULFPORT ENERGY CORP

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)

3001 QUAIL SPRINGS PARKWAY

3. Date of Earliest Transaction (Month/Day/Year)
07/30/2018

(Street)

OKLAHOMA CITY, OK 73134

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
Common Stock	07/30/2018		S		118,974 ⁽¹⁾	D	$ 38.01	9,829,548 ⁽²⁾	D

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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

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Reporting Owners

Reporting Owner Name / Address	Relationships
Reporting Owner Name / Address	Director	10% Owner	Officer	Other
GULFPORT ENERGY CORP 3001 QUAIL SPRINGS PARKWAY OKLAHOMA CITY, OK 73134	X	X

Signatures

/s/ Keri Crowell, Chief Financial Officer		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)	These shares of common stock, par value $0.01 per share ("Common Stock") of Mammoth Energy Services, Inc. (the "Issuer"), were sold by Gulfport Energy Corporation ("Gulfport") to the underwriters in a secondary public offering of 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 Gulfport 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.
(2)	Of these securities, 4,877 are unvested restricted stock units ("RSUs") that were granted under the Issuer's 2016 Equity Incentive Plan and were assigned to Gulfport by its director designee to the Issuer's board of directors under the terms of his employment with Gulfport. Such director designee previously reported the acquisition of the RSUs in his Form 4 filings and indicated that these were assigned to Gulfport. Of these 4,877 unvested RSUs, 2,222 will vest on October 19, 2018 and 2,655 will vest on the earlier of June 7, 2019 and the date of the Issuer's 2019 Annual Meeting of Stockholders. Each RSU represents a contingent right to receive one share of Common Stock of the Issuer.

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