Washington, D.C. 20549

Form 8-K

Date of Report (Date of earliest event reported): January 4, 2017
Mammoth Energy Services, Inc.

(Exact name of registrant as specified in its charter)

(Commission File No.)
(State or other jurisdiction of
incorporation or organization)
(I.R.S. Employer
Identification No.)
4727 Gaillardia Parkway, Suite 200
Oklahoma City, Oklahoma
(Address of principal executive offices)
(Zip Code)
(405) 608-6007
(Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

¨ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
¨ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
¨ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
¨ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act(17 CFR 240.13e-4(c))

Item 5.02 Departure of Directors or Principal Officers; Election of Directors; Appointment of Principal Officers
Resignation of Director

In a letter dated January 4, 2017, Aaron Gaydosik, a member of the Board of Directors (the “Board”) of Mammoth Energy Services, Inc. (the “Company”), notified us that he was resigning from the Board, effective January 4, 2017. In his resignation letter, Mr. Gaydosik advised us that his resignation was not the result of any disagreement with the Company on any matter relating to its operations, policies or practices. Effective upon Mr. Gaydosik’s resignation, his unvested restricted stock units granted under our 2016 Equity Incentive Plan were forfeited.

Appointment of Director

On January 9, 2017, in accordance with our bylaws, the Board appointed Mr. Paul K. Heerwagen IV as a member of the Board, effective immediately. As provided in our bylaws, Mr. Heerwagen will serve until the next Annual Meeting of our Stockholders or until his earlier death, resignation, retirement, disqualification or removal.

Mr. Heerwagen has served as the Vice President, Corporate Development at Gulfport Energy Corporation (“Gulfport”) since May 2014, where he oversees the corporate strategic planning of Gulfport. Prior to his current role with Gulfport, Mr. Heerwagen served as the Director of Investor Relations and Corporate Affairs from May 2008 to May 2014. In that position, Mr. Heerwagen led the investor relations and corporate communication efforts for Gulfport. Mr. Heerwagen also served as an analyst at Gulfport from May 2007 to May 2008. From March 2012 to December 2014, Mr. Heerwagen served as President of each of Stingray Pressure Pumping LLC and Stingray Logistics LLC, where he oversaw their business operations. Mr. Heerwagen holds a Bachelor of Science degree in Finance from Oklahoma State University. We believe Mr. Heerwagen’s corporate strategic planning experience and his experience in the oil and natural gas industry, in particular his experience in the oilfield services business through his prior position with the Stingray entities (which are now subsidiaries of the Company), qualifies him for service as a member of the Board.

Mr. Heerwagen was designated as a potential director by Gulfport pursuant to the terms of the Investor Rights Agreement that the Company entered into with Gulfport on October 12, 2016, in connection with the Company’s initial public offering. Pursuant to Gulfport’s employment policies, Mr. Heerwagen has assigned to Gulfport his right to compensation for his services on the Board. In connection with Mr. Heerwagen’s appointment to the Board, Gulfport, in consideration of the services of Mr. Heerwagen, was granted restricted stock unit awards for 4,444 shares of our common stock under our 2016 Equity Incentive Plan. The restricted stock units will vest in two equal annual installments beginning on October 19, 2017, provided Mr. Heerwagen is in continuous service on such dates. Gulfport, as assignee of Mr. Heerwagen and in consideration of his services to the Company, will also receive the cash compensation and future equity awards given to Mr. Heerwagen as a non-employee director for his services on the Board as disclosed in our final prospectus, filed by us with the Securities and Exchange Commission on October 17, 2016 in connection with our initial public offering.

Item 7.01. Regulation FD Disclosure.

On January 9, 2017, we issued a press release announcing changes to the Board discussed in Item 5.02 above. A copy of the press release is attached as Exhibit 99.1 to this Current Report on Form 8-K.

Item 9.01. Financial Statements and Exhibits.

(d)    Exhibits.

Press release dated January 9, 2017, entitled "Mammoth Energy Services announces changes to the Board of Directors."


Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

January 10, 2017
/s/ Mark Layton
Mark Layton
Chief Financial Officer

Exhibit Index

Press release dated January 9, 2017, entitled "Mammoth Energy Services announces changes to the Board of Directors."


Exhibit 99.1

January 9, 2017

Mammoth Energy Service, Inc. Announces
Changes to the Board of Directors

Oklahoma City, Jan. 9, 2017 (GLOBE NEWSWIRE) -- Mammoth Energy Services (Nasdaq:TUSK) today announced that the Board of Directors appointed Paul Heerwagen as a director effective immediately. Mr. Heerwagen will replace Aaron Gaydosik, who resigned from the Board effective January 4, 2017 to pursue other business opportunities.

Mr. Heerwagen serves as Vice President, Corporate Development for Gulfport Energy Corporation (“Gulfport”), where he oversees corporate strategy. Since joining Gulfport in May 2007, Mr. Heerwagen has served in multiple roles, including as the Director of Investor Relations and Corporate Affairs. In addition, Mr. Heerwagen was involved in the formation of the Stingray entities in 2012 where he served as their President from 2012 to 2014 and oversaw their business operations. Mr. Heerwagen holds a Bachelor of Science degree in Finance from Oklahoma State University.

Marc McCarthy, Chairman of the Board commented, “We welcome Paul Heerwagen to the Mammoth Board of Directors. Paul’s contributions to Gulfport’s growth over the past 10 years as well as his direct experience with the formation and development of Mammoth portfolio companies makes him a strong addition. We look forward to his contributions going forward as Mammoth expands both organically and via acquisition.” Mr. McCarthy further stated, “I would like to thank Aaron Gaydosik for his contributions to Mammoth, and we wish him the best in his new endeavors.”

About Mammoth Energy Services, Inc.

Mammoth Energy is an integrated, growth-oriented oilfield service company serving companies engaged in the exploration and development of North American onshore unconventional oil and natural gas reserves. Mammoth Energy’s suite of services includes completion and production services, natural sand proppant services, contract land and directional drilling services and remote accommodation services.


Mammoth Energy Services, Inc., Attention: Don Crist, Director of Investor Relations, 4727 Gaillardia Parkway, Suite 200, Oklahoma City, Oklahoma 73142, tel: 405-608-6048