On June 21, 2017, André Weiss, a member of the board of directors (the “Board”) of Mammoth Energy Services, Inc. (the “Company”), informed the Company that he was resigning as a member of the Board effective on that date. The Company does not believe that Mr. Weiss’ resignation was the result of any disagreement with the Company on any matter relating to its operations, policies or practices. Prior to his resignation, Mr. Weiss also served on the Board’s Audit Committee and Compensation Committee. Effective upon Mr. Weiss’ resignation, his unvested restricted stock units granted under the Company’s 2016 Equity Incentive Plan were forfeited.

Effective June 26, 2017, the Board appointed James D. Palm to fill the vacancies on the Board and the Board’s Audit Committee and Compensation Committee created by Mr. Weiss’ resignation. As provided in the Company’s bylaws, Mr. Palm will serve until the next Annual Meeting of the Company’s Stockholders or until his earlier death, resignation, retirement, disqualification or removal. The Board determined that Mr. Palm qualifies as an independent director under the NASDAQ Global Select Market rules and the applicable rules and regulations under the Securities Exchange Act of 1934, as amended, for purposes of serving on the Board and each such committee.

Mr. Palm most recently served as a director of Gulfport Energy Corporation (“Gulfport”) from February 2006 and as Chief Executive Officer of Gulfport from December 2005, in each case until his retirement in February 2014. Prior to joining Gulfport, Mr. Palm pursued oil and gas investments primarily in Oklahoma, the Texas Panhandle and Kansas as the manager and owner of Crescent Exploration, LLC, a company he founded in 1995. Mr. Palm currently serves as a member of the Industry Advisory Committee of the Oklahoma Corporation Commission. From October 2001 through October 2003, Mr. Palm served as the Chairman of the Oklahoma Energy Resources Board. From 1997 through 1999, Mr. Palm served as the President of the Oklahoma Independent Petroleum Association. Mr. Palm received a Bachelor of Science degree in Mechanical Engineering in 1968, and a Masters in Business Administration in 1971, both from Oklahoma State University.

In connection with Mr. Palm’s appointment to the Board, Mr. Palm will be entitled to receive the cash compensation and equity awards generally given to the Company’s non-employee directors for their services on the Board and its committees as disclosed in the Company’s Definitive Proxy Statement on Form 14A, filed by the Company with the Securities and Exchange Commission on April 28, 2017.

About Mammoth Energy Services, Inc. (NASDAQ:TUSK)

Mammoth Energy Services, Inc. is an integrated oilfield service company. The Company is engaged in the exploration and development of North American onshore unconventional oil and natural gas reserves. The Company’s segments include Contract Land and Directional Drilling Services; Completion and Production Services; Natural Sand Proppant Services, and Remote Accommodation Services. Its Completion and Production Services division provides pressure pumping services, pressure control Services, flowback services and equipment rentals. Its Natural Sand Proppant Services division is engaged in selling, distributing and producing proppant for hydraulic fracturing. Its Contract Land and Directional Drilling Services division provides drilling rigs and crews for operators, as well as rental equipment. Its Remote Accommodation Services division provides housing, kitchen and dining, and recreational service facilities for oilfield workers located in remote areas.