EX-4.2



 Exhibit 4.2 

INVESTOR RIGHTS AGREEMENT 

by and among 
 Mammoth
Energy Services, Inc. 
 and 

Gulfport Energy Corporation 

Dated as of 

October 12, 2016 
  

 







 TABLE OF CONTENTS 

 

									
	 	 	 	  	 	  	Page	 
	 Section 1.
	 		  	Definitions	  	 	1	  
				
	 Section 2.
	 		  	Demand Registrations	  	 	5	  
			
	 (a)
	 	Demand Notice	  	 	5	  
			
	 (b)
	 	Request for Underwritten Offering	  	 	5	  
			
	 (c)
	 	Limitation on Underwritten Offerings	  	 	5	  
			
	 (d)
	 	General Procedures for Underwritten Offerings	  	 	5	  
			
	 (e)
	 	Effectiveness of Demand Registrations	  	 	6	  
			
	 (f)
	 	Registration Statement	  	 	6	  
			
	 (g)
	 	Amendments; Supplements	  	 	7	  
			
	 (h)
	 	Effectiveness	  	 	7	  
			
	 (i)
	 	Holders Withdrawal	  	 	7	  
			
	 (j)
	 	Preemption of Demand Registration	  	 	7	  
			
	 (k)
	 	Priority on Demand Registrations	  	 	8	  
				
	 Section 3.
	 		  	Piggyback Registrations	  	 	8	  
			
	 (a)
	 	Right to Piggyback Registrations	  	 	8	  
			
	 (b)
	 	Priority on Piggyback Registrations	  	 	8	  
				
	 Section 4.
	 		  	Obligations of the Company	  	 	9	  
			
	 (a)
	 	Delay Period	  	 	9	  
			
	 (b)
	 	Registration Procedures	  	 	10	  
				
	 Section 5.
	 		  	Registration Expenses	  	 	13	  
			
	 (a)
	 	Expenses Payable by the Company	  	 	13	  
			
	 (b)
	 	Expenses Payable by the Holders	  	 	14	  
				
	 Section 6.
	 		  	Indemnification	  	 	14	  
			
	 (a)
	 	Indemnification by the Company	  	 	14	  
			
	 (b)
	 	Indemnification by the Holders	  	 	15	  
			
	 (c)
	 	Conduct of Indemnification Proceedings	  	 	15	  
			
	 (d)
	 	Survival	  	 	16	  
			
	 (e)
	 	Right to Contribution	  	 	16	  
				
	 Section 7.
	 		  	Rules 144 and 144A	  	 	17	  
				
	 Section 8.
	 		  	Covenants of Holders	  	 	17	  
				
	 Section 9.
	 		  	Board and Information Rights; Other Covenants	  	 	17	  
			
	 (a)
	 	Board Composition	  	 	17	  
			
	 (b)
	 	Company Action to Nominate and Elect the Gulfport Director	  	 	17	  


  
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	 (c)
	 	Board Advisor Rights	  	 	18	  
			
	 (d)
	 	Gulfport Designation, Removal and Vacancies	  	 	18	  
			
	 (e)
	 	Committees	  	 	18	  
			
	 (f)
	 	Election Not to Exercise Designation Rights	  	 	18	  
			
	 (g)
	 	Qualifications and Information	  	 	19	  
			
	 (h)
	 	Director Insurance and Indemnification	  	 	19	  
			
	 (i)
	 	Expenses of Directors	  	 	19	  
			
	 (j)
	 	Information Rights	  	 	19	  
			
	 (k)
	 	Inspection Rights	  	 	20	  
			
	 (l)
	 	Other Contributions	  	 	21	  
				
	 Section 10.
	 		  	Miscellaneous	  	 	21	  
			
	 (a)
	 	No Inconsistent Agreements	  	 	21	  
			
	 (b)
	 	Remedies	  	 	21	  
			
	 (c)
	 	Amendments and Waivers	  	 	22	  
			
	 (d)
	 	Successors and Assigns	  	 	22	  
			
	 (e)
	 	Severability	  	 	22	  
			
	 (f)
	 	Counterparts	  	 	22	  
			
	 (g)
	 	Descriptive Headings: Interpretation	  	 	22	  
			
	 (h)
	 	Notices	  	 	22	  
			
	 (i)
	 	GOVERNING LAW; SUBMISSION TO JURISDICTION	  	 	23	  
			
	 (j)
	 	Entire Agreement	  	 	24	  
			
	 (k)
	 	Limited Recourse	  	 	24	  


  
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 INVESTOR RIGHTS AGREEMENT 

THIS INVESTOR RIGHTS AGREEMENT (this “Agreement”) is made and entered into as of October 12, 2016, by and between
Mammoth Energy Services, Inc., a Delaware corporation (the “Company”), and Gulfport Energy Corporation, a Delaware corporation (the “Stockholder” or “Gulfport”). 

WHEREAS, the Company was formed in June 2016 in contemplation of an initial public offering of common stock of the Company
(“Common Stock Offering”). 
 WHEREAS, the Stockholder will be issued 9,150,000 shares (the
“Shares”) of Common Stock (as defined below), all of which will be validly issued, fully paid and non-assessable pursuant to the Contribution Agreement (as defined below). 

WHEREAS, the parties hereto desire to enter into this Agreement to govern certain of their rights, duties and obligations relating to
registration of the Registrable Securities (as defined below), the nomination of directors, board advisor rights and information rights. 

NOW, THEREFORE, for good, valuable and binding consideration, the receipt and sufficiency of which are hereby acknowledged, the parties
hereto, intending to be legally bound hereby, now agree as follows: 
 STATEMENT OF AGREEMENT 

Section 1. Definitions. As used in this Agreement, the following terms shall have the meanings set forth below: 

“Agreement” has the meaning set forth in the introductory paragraph of this Agreement. 

“Affiliate” means, with respect to any Person, a Person that, directly or indirectly, through one or more
intermediaries, Controls, is Controlled by, or is under common Control with the specified Person. 
 “Board” means
the Board of Directors of the Company. 
 “Board Advisor” has the meaning set forth in Section 9(c)(1) of
this Agreement. 
 “Commission” means the United States Securities and Exchange Commission or any other United
States federal agency at the time administering the Securities Act. 
 “Common Stock” means the Company’s
common stock, par value $0.01 per share, or any other shares of capital stock or other securities of the Company into which such shares of Common Stock shall be reclassified or changed, including by reason of a merger, consolidation, reorganization
or recapitalization. If the Common Stock has been so reclassified or changed, or if the Company pays a dividend or makes a distribution on the Common Stock in shares of capital stock, or subdivides (or combines) its outstanding shares of Common
Stock into a greater (or smaller) number of shares of Common Stock, a share of Common Stock shall be deemed to be 

  
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such number of shares of stock and amount of other securities to which a holder of a share of Common Stock outstanding immediately prior to such change, reclassification, exchange, dividend,
distribution, subdivision or combination would be entitled. 
 “Common Stock Offering” has the meaning set forth in
the recitals of this Agreement. 
 “Company” has the meaning set forth in the introductory paragraph of this
Agreement. 
 “Contribution Agreement” means that certain Contribution Agreement by and among the Company, Mammoth
Holdings, Rhino and the Stockholder dated as of October 3, 2016. 
 “Controlling,” “Controlled
by” and “under common Control with” refer to the possession, directly or indirectly, of the power to direct or cause the direction of the management or policies of a Person, whether through the ownership of
voting securities, any equity interest, or a membership interest in a non-stock corporation; by contract; by power granted in bylaws or similar governing documents; or otherwise. Without limiting the foregoing, any ownership interest greater than
fifty percent (50%) for purposes hereof constitutes “Control.” 
 “Delay Period” has the
meaning set forth in Section 4(a) of this Agreement. 
 “Demand Notice” has the meaning set forth in
Section 2(a) of this Agreement. 
 “Demand Registration” means a request that the Company register under and
in accordance with the provisions of the Securities Act all or part of the Registrable Securities of a Holder pursuant to Section 2 of this Agreement. 

“Director” means a member of the Board. 

“Equity Right” means any options, warrants, exchangeable or convertible securities, subscription rights, exchange
rights, statutory pre-emptive rights, preemptive rights granted under its Governing Documents, stock appreciation rights, phantom stock, profit participation or similar rights, or any other right or instrument pursuant to which any Person may be
entitled to purchase any security interest in the Company. 
 “Exchange Act” means the United States Securities
Exchange Act of 1934, as amended, and the rules and regulations of the Commission thereunder. 
 “Form S-1” means
the Registration Statement on Form S-1, File No. 333-213504, filed by the Company with the Commission on September 2, 2016, as amended. 

“Governing Documents” means with respect to the Company, its Amended and Restated Certificate of Incorporation and its
Bylaws, in each case as amended, amended and restated, modified, supplemented, extended, renewed, restated or replaced from time to time. 

“Gulfport” has the meaning set forth in the introductory paragraph of this Agreement. 

“Gulfport Director” has the meaning set forth in Section 9(a) of this Agreement. 

  
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 “Holder(s)” means a Person who owns Registrable Securities and is either
the Stockholder or a Permitted Transferee of the Stockholder that has agreed to be bound by the terms of this Agreement as if such Person were the Stockholder. 

“Holder Indemnified Parties” has the meaning set forth in Section 6(a) of this Agreement. 

“Independent Director” means a natural person meeting independence standards required of directors who serve on an
audit committee of a board of directors established by and under the Exchange Act and the Marketplace Rules. 
 “Interruption
Period” has the meaning set forth in the last paragraph in Section 4(b) of this Agreement. 
 “Large
Accelerated Filer” has the meaning ascribed to it in Rule 12b-2 promulgated under the Exchange Act. 

“Law” means any law (statutory, common or otherwise), constitution, ordinance, rule, regulation, executive order or
other similar authority enacted, adopted, promulgated or applied by any legislature, agency, bureau, branch, department, division, commission, court, tribunal or other similar recognized organization or body of any federal, state, county, municipal,
local or foreign government or other similar recognized organization or body exercising similar powers or authority. 

“Losses” has the meaning set forth in Section 6(a) of this Agreement. 

“Mammoth Holdings” means Mammoth Energy Holdings LLC, a Delaware limited liability company. 

“Mammoth Holdings Registration Rights Agreement” means that certain Registration Rights Agreement, dated as of the
date hereof, by and between the Company and Mammoth Holdings. 
 “Managing Underwriter(s)” means, with respect to
any Underwritten Offering, the book-running lead manager(s) of such Underwritten Offering. 
 “Marketplace Rules”
means the rules and regulations of the national securities exchange on which any class of Common Stock are listed or admitted to trading. 

“Misstatement/Omission” has the meaning set forth in Section 6(a) of this Agreement. 

“Other Securities” has the meaning set forth in the definition of “Registrable Securities.” 

“Permitted Transferee” means any Person to whom the rights under this Agreement have been assigned in accordance with
the provisions of Section 10(d) of this Agreement. 

  
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 “Person” means any natural person, corporation, partnership, firm,
association, trust, government, governmental agency, limited liability company or any other entity, whether acting in an individual, fiduciary or other capacity. 

“Piggyback Registration” has the meaning set forth in Section 3(a) of this Agreement. 

“Prospectus” means the prospectus included in any Registration Statement, as amended or supplemented by any prospectus
supplement, with respect to the terms of the offering of any portion of the Registrable Securities covered by such Registration Statement, and all other amendments and supplements to the Prospectus, including post-effective amendments, and all
material incorporated by reference or deemed to be incorporated by reference in such prospectus. 
 “Registrable
Securities” means (i) the Shares, (ii) any other shares of Common Stock that may be acquired by a Holder prior to or after the closing of the Common Stock Offering and (iii) any shares of Common Stock issuable pursuant to any rights to
acquire Common Stock held by a Holder prior to or after the closing of the Common Stock Offering. If as a result of any reclassification, stock dividends or stock splits or in connection with a combination of shares, recapitalization, merger,
consolidation or other reorganization or other transaction or event, any capital stock, evidence of indebtedness, warrants, options, rights or other securities (collectively “Other Securities”) are issued or transferred to a
Holder in respect of Registrable Securities held by the Holder, references herein to Registrable Securities shall be deemed to include such Other Securities. As to any particular Registrable Securities, such securities will cease to be Registrable
Securities when (i) they have been distributed to the public pursuant to an offering registered under the Securities Act, or may legally be distributed to the public in one transaction pursuant to Rule 144 under the Securities Act, (ii) they have
been distributed to the public pursuant to Rule 144 (or any successor provision) under the Securities Act, or (iii) they have been sold to any Person to whom the rights under this Agreement are not assigned in accordance with this Agreement. 

“Registration Statement” means any registration statement under the Securities Act of the Company that covers any of
the Registrable Securities, including the related Prospectus, amendments and supplements to such registration statement or Prospectus, including pre- and post-effective amendments, all exhibits, and all materials incorporated by reference or deemed
to be incorporated by reference in such registration statement or Prospectus. 
 “Rhino” means Rhino Exploration
LLC, a Delaware limited liability company. 
 “Rhino Registration Rights Agreement” means that certain Registration
Rights Agreement, dated as of the date hereof, by and between the Company and Rhino. 
 “Rule 13d-3” has the meaning
set forth in Section 9(a) of this Agreement. 
 “Securities Act” means the United States Securities Act of 1933, as
amended, and the rules and regulations of the Commission promulgated thereunder. 
 “Shares” has the meaning set
forth in the recitals of this Agreement. 
 “Stockholder” has the meaning set forth in the introductory paragraph of
this Agreement. 

  
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 “Transfer” has the meaning set forth in Section 9(l) of this
Agreement. 
 “Underwritten Offering” means an offering (including an offering pursuant to a Registration Statement)
in which Common Stock is sold to an underwriter on a firm commitment basis for reoffering to the public or an offering that is a “bought deal” with one or more investment banks. 

Section 2. Demand Registrations.

(a) Demand Notice. After the closing of the Common Stock Offering, upon the written request (a “Demand
Notice”) by Holders collectively owning at least a majority of the then-outstanding Registrable Securities, the Company shall file with the Commission, a Registration Statement under the Securities Act providing for the resale of such
Registrable Securities (which may, at the option of the Holders giving such Demand Notice, so long as such Demand Notice relates to a Registration Statement to be filed on Form S-3, be a Registration Statement that provides for the resale of such
Registrable Securities pursuant to Rule 415 from time to time by the Holders). There shall be no limit on the number of Registration Statements that may be required by the Holders pursuant to this Section 2(a). Any Registration Statement
shall provide for the resale pursuant to any method or combination of methods legally available to, and requested by, the Holders of any and all such Registrable Securities covered by such Registration Statement. 

(b) Request for Underwritten Offering. In the event that Holders collectively holding at least a majority of the then-outstanding
Registrable Securities elect to dispose of Registrable Securities under a Registration Statement pursuant to an Underwritten Offering, the Company shall, upon request by such Holders pursuant to Section 2(a), enter into an underwriting
agreement in customary form to permit such Holders to effect such sale through an Underwritten Offering and take all commercially reasonable actions as are requested by the Managing Underwriter to expedite or facilitate the disposition of such
Registrable Securities. The Company shall, upon request of the Holders, cause its management to participate in a roadshow or similar marketing effort in connection with any such Underwritten Offering. 

(c) Limitation on Underwritten Offerings. In no event shall the Company be required hereunder to (i) participate in more than
three Underwritten Offerings in any 12-month period or (ii) register Registrable Securities under this Section 2 unless the aggregate offering price to the public for such offering of Registrable Securities included in such Demand Notice is
expected to be at least $1.0 million. 
 (d) General Procedures for Underwritten Offerings. In connection with any
Underwritten Offering pursuant to this Section 2, the Holders of a majority in number of the Registrable Securities being sold in such Underwritten Offering shall be entitled, subject to the Company’s consent (which is not to be
unreasonably withheld), to select the Managing Underwriter. In connection with any Underwritten Offering under this Agreement, each selling Holder and the Company shall be obligated to enter into an underwriting agreement that contains such
representations and warranties, covenants, indemnities and other rights and obligations as are customary in underwriting agreements for firm commitment offerings of securities; provided, that, no selling Holder shall be required to make any
representations or warranties to the 

  
 5 








 
Company or the underwriters other than representations and warranties regarding such selling Holder’s ownership of and title to the Registrable Securities and such selling Holder’s
intended method of distribution. No selling Holder may participate in such Underwritten Offering unless such selling Holder agrees to sell its Registrable Securities on the basis provided in such underwriting agreement and completes and executes all
questionnaires, powers of attorney, indemnities and other documents reasonably required under the terms of such underwriting agreement and furnish to the Company such information as the Company may reasonably request for inclusion in a Registration
Statement or prospectus or any amendment or supplements thereto, as the case may be. Each selling Holder may, at its option, require that any or all of the representations and warranties by, and the other agreements on the part of, the Company to
and for the benefit of such underwriters also be made to and for such selling Holder’s benefit and that any or all of the conditions precedent to the obligations of such underwriters under such underwriting agreement also be conditions
precedent to such selling Holder’s obligations. If any selling Holder disapproves of the terms of an Underwritten Offering contemplated by this Section 2, such selling Holder may elect to withdraw from the Underwritten Offering by notice
to the Company and the Managing Underwriter; provided, however, that such withdrawal must be made at a time prior to the effective date of the Registration Statement in respect of such Underwritten Offering. No such withdrawal shall
affect the Company’s obligation to pay registration expenses pursuant to Section 5. 
 (e) Effectiveness of Demand
Registrations. A Demand Registration shall not be deemed to be effected and shall not count as a Demand Registration of any Person (i) if a Registration Statement with respect thereto shall not have become effective under the Securities Act and
remained effective (A) for at least 180 days (excluding any Interruption Period or Delay Period) in the case of a Demand Registration that is not on a Form S-3 or other comparable form or (B) for at least two years (excluding any Interruption Period
or Delay Period) in the case of a Demand Registration on Form S-3 or other comparable form, or until the completion of the distribution of the Registrable Securities thereunder, whichever is earlier (including, without limitation, because of
withdrawal of such Registration Statement by the Holders pursuant to Section 2(i) hereunder), (ii) if, after it has become effective, such registration is interfered with for any reason by any stop order, injunction or other
order or requirement of the Commission or any governmental authority, or as a result of the initiation of any proceeding for such stop order by the Commission through no fault of the Holders and the result of such interference is to prevent the
Holders from disposing of such Registrable Securities proposed to be sold in accordance with the intended methods of disposition, or (iii) if the conditions to closing specified in the purchase agreement or underwriting agreement entered into in
connection with any Underwritten Offering shall not be satisfied or waived with the consent of the Holders of a majority in number of the Registrable Securities to be included in such Demand Registration, other than as a result of any breach by the
Holders or any underwriter of its obligations thereunder or hereunder. 
 (f) Registration Statement. As soon as practicable,
but in any event within 45 days of the date on which the Company first receives a Demand Notice pursuant to Section 2(a) hereof, or in the case of a Demand Notice with respect to an Underwritten Offering, within 90 days of the date on which
the Company first receives such a Demand Notice, the Company shall file with the Commission a Registration Statement on the appropriate form for the registration and sale of the total number of Registrable Securities specified in such Demand Notice,
together 

  
 6 








 
with the number of Registrable Securities requested to be included in the Demand Registration by other Holders, in accordance with the intended method or methods of distribution specified by the
Holders in such Demand Notice. The Company shall use its reasonable best efforts to cause such Registration Statement to be declared effective by the Commission as soon as reasonably practicable. 

(g) Amendments; Supplements. Subject to Section 4(a), upon the occurrence of any event that would cause the Registration
Statement (A) to contain a material misstatement or omission or (B) to be not effective and usable for resale of Registrable Securities during the period that such Registration Statement is required to be effective and usable, the Company shall file
an amendment to the Registration Statement as soon as reasonably practicable if the Registration Statement is not on Form S-3 or another comparable form and such misstatement or omission is not corrected as soon as reasonably practicable by
incorporation by reference, in the case of clause (A), correcting any such misstatement or omission and, in the case of either clause (A) or (B), use its reasonable best efforts to cause such amendment to be declared effective and such Registration
Statement to become usable as soon as reasonably practicable thereafter. 
 (h) Effectiveness. The Company agrees to use its
reasonable best efforts to keep any Registration Statement filed pursuant to this Section 2 continuously effective and usable for the sale of Registrable Securities until the earlier of (i) (a) in the case of a Demand Registration for delayed
or continuous offerings of Registrable Securities filed on Form S-3 or another comparable form, two years after the date on which the Commission declares such Registration Statement effective (excluding any Interruption Period or Delay Period) or
(b) in the case of a Demand Registration that is not on Form S-3 or another comparable form, 180 days from the date on which the Commission declares such Registration Statement effective (excluding any Interruption Period or Delay Period) and (ii)
the date on which there are no longer any Registrable Securities. 
 (i) Holders Withdrawal. Holders of a majority in number of
the Registrable Securities to be included in a Demand Registration pursuant to this Section 2 may, at any time prior to the effective date of the Registration Statement in respect thereof, revoke such request by providing a written notice to
the Company to such effect. No such revocation shall affect the Company’s obligation to pay registration expenses pursuant to Section 5. 

(j) Preemption of Demand Registration. Notwithstanding anything to the contrary contained herein, after receiving a written
request for a Demand Registration, the Company may elect to effect an underwritten primary registration in lieu of the Demand Registration if the Board believes that such primary registration would be in the best interests of the Company. If the
Company so elects to effect a primary registration, the Company shall give prompt written notice (which shall be given not later than 20 days after the date of the Demand Notice) to all Holders of its intention to effect such a registration and
shall afford the Holders the rights contained in Section 3 with respect to Piggyback Registrations. In the event that the Company so elects to effect a primary registration after receiving a request for a Demand Registration, the Company
shall use its reasonable best efforts to have the Registration Statement declared effective by the Commission as soon as reasonably practicable. In addition, the request for a Demand Registration shall be deemed to have been withdrawn and such
primary registration shall not be deemed to be a Demand Registration. 

  
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 (k) Priority on Demand Registrations. If a Demand Registration that is an
Underwritten Offering or an underwritten primary registration pursuant to Section 2(j) in each case includes securities for sale by the Company, and the Managing Underwriter advises the Company, in writing, that, in its good faith judgment,
the number of securities requested to be included in such registration exceeds the number which can be sold in such offering without materially and adversely affecting the marketability of the offering, then the Company will include in any such
registration the maximum number of shares that the Managing Underwriter advises the Company can be sold in such offering allocated as follows: (i) first, the Registrable Securities requested to be included in such registration by the initiating
Holders and securities of other Holders of Registrable Securities and holders of Registrable Securities (as defined in the Mammoth Holdings Registration Rights Agreement and in the Rhino Registration Rights Agreement), with all such securities to be
included on a pro rata basis (or in such other basis mutually agreed among such Holders and such other holders) based on the amount of securities requested to be included therein and (ii) second, to the extent that any other securities may be
included without exceeding the limitations recommended by the underwriter as aforesaid, the securities that the Company proposes to sell together with such additional securities to be included on a pro rata basis (or in such other proportion
mutually agreed upon among the Company and such other holders) based on the amount of securities requested to be included therein. If the initiating Holders are not allowed to register all of the Registrable Securities requested to be included by
such Holders because of allocations required by this section, such initiating Holders shall not be deemed to have exercised a Demand Registration for purposes of Section 2(c). 

Section 3. Piggyback Registrations. 

(a) Right to Piggyback Registrations. Whenever the Company or another party having registration rights proposes that the Company
register any of the Company’s equity securities under the Securities Act (other than a registration on Form S-4 relating solely to a transaction described in Rule 145 of the Securities Act or a registration on Form S-8 or any successor forms
thereto), whether or not for sale for the Company’s own account, the Company will give prompt written notice of such proposed filing to all Holders at least 15 days before the anticipated filing date. Such notice shall offer such Holders the
opportunity to register such amount of Registrable Securities as they shall request (a “Piggyback Registration”). Subject to Section 3(b) hereof, the Company shall include in each such Piggyback Registration all
Registrable Securities with respect to which the Company has received written requests for inclusion therein within 10 days after such notice has been given by the Company to the Holders. If the Registration Statement relating to the Piggyback
Registration is for an Underwritten Offering, such Registrable Securities shall be included in the underwriting on the same terms and conditions as the securities otherwise being sold through the underwriters. Each Holder shall be permitted to
withdraw all or part of the Registrable Securities from a Piggyback Registration at any time prior to the effective date of the Registration Statement in respect of such Piggyback Registration. 

(b) Priority on Piggyback Registrations. If a Piggyback Registration is an Underwritten Offering and the Managing Underwriters
advise the party or parties initiating such offering in writing (a copy of which writing shall be provided to the Holders) that in their good faith judgment the number of securities requested to be included in such registration exceeds the


  
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number which can be sold in such offering without materially and adversely affecting the marketability of the offering, then any such registration shall include the maximum number of shares that
such Managing Underwriters advise can be sold in such offering allocated as follows: (x) if the Company has initiated such offering, (i) first, the securities the Company proposes to sell, and (ii) second, to the extent that any other securities may
be included without exceeding the limitations recommended by the underwriters as aforesaid, (A) the Registrable Securities to be included in such registration by the Holders and the holders of Registrable Securities (as defined in the Mammoth
Holdings Registration Rights Agreement and in the Rhino Registration Rights Agreement), with all such additional securities to be included on a pro rata basis (or in such other proportion mutually agreed among the Holders and such other holders),
based on the amount of Registrable Securities and other securities requested to be included therein, and then, if additional securities may be included (B) to such additional securities on a pro rata basis (or in such other basis mutually agreed
among them), (y) if a holder of Registrable Securities (as defined in the Mammoth Holdings Registration Rights Agreement) has initiated such offering, (i) first, the securities the holders under the Mammoth Holdings Registration Rights Agreement
propose to sell together with the securities the Holders of Registrable Securities hereunder and the holders of Registrable Securities as defined in the Rhino Registration Rights Agreement, propose to sell on a pro rata basis (or in such other basis
mutually agreed upon among such holders and the Holders), based on the amount of securities requested to be included therein and (ii) second, to the extent that any other securities may be included without exceeding the limitations recommended by
the underwriters as aforesaid, all such other securities on a pro rata basis (or in such other proportion mutually agreed upon among the Company, if applicable, and such other holders) based on the amount of securities requested to be included
therein, and (z) if a party other than the Company or a holder under the Mammoth Holdings Registration Rights Agreement initiated such offering, (i) first, the securities such other party proposes to sell, and (ii) second, to the extent that any
other securities may be included without exceeding the limitations recommended by the underwriters as aforesaid, securities proposed to be sold by the Company, and the Registrable Securities to be included in such registration by the Holders, the
holders of Registrable Securities as defined in the Mammoth Holdings Registration Rights Agreement and the holders of Registrable Securities as defined in the Rhino Registration Rights Agreement, with such additional securities to be included on a
pro rata basis (or in such other basis mutually agreed among the Company, the Holders and such other holders), based on the amount of Registrable Securities and other securities requested to be included therein. 

Section 4. Obligations of the Company. 

(a) Delay Period. Notwithstanding the foregoing, the Company shall have the right to delay the filing of any Registration
Statement otherwise required to be prepared and filed by the Company pursuant to Sections 2 or 3, or to suspend the use of any Registration Statement, for a period not in excess of 60 consecutive calendar days (a “Delay
Period”) if (i) the Board by written resolution determines that filing or maintaining the effectiveness of such Registration Statement would have a material adverse effect on the Company or the holders of its capital stock in relation
to any material acquisition or disposition, financing or other corporate transaction or (ii) the Board by written resolution determines in good faith that the filing of a Registration Statement or maintaining the effectiveness of a current
Registration Statement would require disclosure of material information that the Company has a valid business purpose for retaining as confidential at such time. The Company shall not be entitled to exercise a Delay Period more than one time in any
12-month period. 

  
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 (b) Registration Procedures. Whenever the Company is required to register Registrable
Securities pursuant to Sections 2 or 3 hereof, the Company will use its reasonable best efforts to effect the registration to permit the sale of such Registrable Securities in accordance with the intended method or methods of
disposition thereof, and pursuant thereto the Company will as expeditiously as possible: 
 (1) prepare and file with the Commission a
Registration Statement with respect to such Registrable Securities as prescribed by Sections 2 or 3 on a form available for the sale of the Registrable Securities by the holders thereof in accordance with the intended method or methods
of distribution thereof and use its reasonable best efforts to cause each such Registration Statement to become and remain effective within the time periods and otherwise as provided herein; 

(2) prepare and file with the Commission such amendments (including post-effective amendments) to the Registration Statement and such
supplements to the Prospectus as may be necessary to keep such Registration Statement effective within the time periods and otherwise as provided herein and to comply with the provisions of the Securities Act with respect to the disposition of all
securities covered by such Registration Statement until such time as all of such securities have been disposed of in accordance with the intended methods of disposition by the seller or sellers thereof set forth in such Registration Statement,
except as otherwise expressly provided herein; 
 (3) furnish to each selling Holder and to each underwriter, if any, such number of
copies of such Registration Statement, each amendment and post-effective amendment thereto, the Prospectus included in such Registration Statement (including each preliminary prospectus and any supplement to such Prospectus and any other prospectus
filed under Rule 424 of the Securities Act), in each case including all exhibits, and such other documents as such Holder may reasonably request in order to facilitate the disposition of the Registrable Securities owned by such Holder or to be
disposed of by such underwriter (the Company hereby consenting to the use in accordance with all applicable Law of each such Registration Statement (or amendment or post-effective amendment thereto) and each such Prospectus (or preliminary
prospectus or supplement thereto) by each such Holder and the underwriters, if any, in connection with the offering and sale of the Registrable Securities covered by such Registration Statement or Prospectus); 

(4) use its reasonable best efforts to register or qualify and, if applicable, to cooperate with the selling Holders, the underwriters,
if any, and their respective counsel in connection with the registration or qualification (or exemption from such registration or qualification) of, the Registrable Securities for offer and sale under the securities or blue sky laws of such
jurisdictions as any selling Holder or Managing Underwriters (if any) shall reasonably request, to keep each such registration or qualification (or exemption therefrom) effective during the period such Registration Statement is required to be kept
effective as provided herein and to do any and all other acts or things necessary or advisable to enable the disposition in such jurisdictions of the securities covered by the applicable Registration


  
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Statement; provided, however, that the Company will not be required to (i) qualify generally to do business in any jurisdiction where it would not otherwise be required to qualify but for
this paragraph or (ii) consent to general service of process or taxation in any such jurisdiction where it is not so subject; 

(5) cause all such Registrable Securities to be listed or quoted (as the case may be) on each national securities exchange or other
securities market on which securities of the same class as the Registrable Securities are then listed or quoted; 
 (6) provide a
transfer agent and registrar for all such Registrable Securities and a CUSIP number for all such Registrable Securities not later than the effective date of such Registration Statement; 

(7) comply with all applicable rules and regulations of the Commission, and make available to its security holders an earnings statement
satisfying the provisions of Section 11(a) of the Securities Act and Rule 158 thereunder (or any similar rule promulgated under the Securities Act) no later than 45 days after the end of any 12-month period (or 90 days after the end of any 12-month
period if such period is a fiscal year) (or in each case within such extended period of time as may be permitted by the Commission for filing the applicable report with the Commission) (i) commencing at the end of any fiscal quarter in which
Registrable Securities are sold to underwriters in an Underwritten Offering or (ii) if not sold to underwriters in such an offering, commencing on the first day of the first fiscal quarter of the Company after the effective date of a Registration
Statement; 
 (8) use its reasonable best efforts to prevent the issuance of any order suspending the effectiveness of a Registration
Statement or suspending the qualification (or exemption from qualification) of any of the Registrable Securities included therein for sale in any jurisdiction, and, in the event of the issuance of any stop order suspending the effectiveness of a
Registration Statement, or of any order suspending the qualification of any Registrable Securities included in such Registration Statement for sale in any jurisdiction, the Company will use its reasonable best efforts promptly to obtain the
withdrawal of such order at the earliest possible moment; 
 (9) obtain “cold comfort” letters and updates thereof (which
letters and updates (in form, scope and substance) shall be reasonably satisfactory to the Managing Underwriters, if any, and the selling Holders) from the independent certified public accountants of the Company (and, if necessary, any other
independent certified public accountants of any subsidiary of the Company or of any business acquired by the Company for which financial statements and financial data are, or are required to be, included in the Registration Statement), addressed to
each of the underwriters, if any, and each selling Holder, such letters to be in customary form and covering matters of the type customarily covered in “cold comfort” letters in connection with Underwritten Offerings and such other matters
as the underwriters, if any, or the Holders of a majority of the Registrable Securities being included in the registration may reasonably request; 

(10) obtain opinions of independent counsel to the Company and updates thereof (which counsel and opinions (in form, scope and
substance) shall be reasonably 

  
 11 








 
satisfactory to the Managing Underwriters, if any, and the Holders of a majority of the Registrable Securities being included in the registration), addressed to each selling Holder and each of
the underwriters, if any, covering the matters customarily covered in opinions of issuer’s counsel requested in Underwritten Offerings, such as the effectiveness of the Registration Statement and such other matters as may be requested by such
counsel and underwriters, if any; 
 (11) promptly notify the selling Holders and the Managing Underwriters, if any, and confirm such
notice in writing, when a Prospectus or any supplement or post-effective amendment to such Prospectus has been filed, and, with respect to a Registration Statement or any post-effective amendment thereto, when the same has become effective, (i) of
any request by the Commission or any other federal or state governmental authority for amendments or supplements to a Registration Statement or related Prospectus or for additional information, (ii) of the issuance by the Commission of any stop
order suspending the effectiveness of a Registration Statement or of any order preventing or suspending the use of any Prospectus or the initiation of any proceedings by any Person for that purpose, (iii) of the receipt by the Company of any
notification with respect to the suspension of the qualification or exemption from qualification of a Registration Statement or any of the Registrable Securities for offer or sale under the securities or blue sky laws of any jurisdiction, or the
contemplation, initiation or threatening, of any proceeding for such purpose, and (iv) of the happening of any event or the existence of any facts that make any statement made in such Registration Statement or Prospectus untrue in any material
respect or that require the making of any changes in such Registration Statement or Prospectus so that it will not contain any untrue statement of a material fact or omit to state any material fact required to be stated therein or necessary to make
the statements therein, in light of the circumstances under which they were made (in the case of any Prospectus), not misleading (which notice shall be accompanied by an instruction to the selling Holders and the Managing Underwriters, if any, to
suspend the use of the Prospectus until the requisite changes have been made); 
 (12) if requested by the Managing Underwriters, if
any, or a Holder of Registrable Securities being sold, promptly incorporate in a prospectus, supplement or post-effective amendment such information as the Managing Underwriters, if any, and the Holders of a majority of the Registrable Securities
being sold reasonably request to be included therein relating to the sale of the Registrable Securities, including, without limitation, information with respect to the number of shares of Registrable Securities being sold to underwriters, the
purchase price being paid therefor by such underwriters and with respect to any other terms of the Underwritten Offering of the Registrable Securities to be sold in such offering, and make all required filings of such prospectus, supplement or
post-effective amendment promptly following notification of the matters to be incorporated in such supplement or post-effective amendment; 

(13) if requested, furnish to each selling Holder and the Managing Underwriter, without charge, at least one signed copy of the
Registration Statement; 
 (14) as promptly as practicable upon the occurrence of any event contemplated by Section
4(b)(11)(iv) above, prepare a supplement or post-effective amendment to the Registration Statement or the Prospectus, or any document incorporated therein by reference, or file any other required document so that, as thereafter
delivered to the purchasers of the Registrable Securities being sold hereunder, the Prospectus will not contain an untrue 

  
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statement of a material fact or an omission to state a material fact required to be stated in a Registration Statement or Prospectus or necessary to make the statements therein, in light of the
circumstances under which they were made, not misleading; and 
 (15) if such offering is an Underwritten Offering, enter into such
agreements (including an underwriting agreement in form, scope and substance as is customary in Underwritten Offerings) and take all such other appropriate and reasonable actions requested by the Holders owning a majority of the Registrable
Securities being sold in connection therewith or by the Managing Underwriters (including cooperating in reasonable marketing efforts, including in connection with any Demand Registration, participation by senior executives of the Company in any
“roadshow” or similar meeting with potential investors) in order to expedite or facilitate the disposition of such Registrable Securities, and in such connection, provide indemnification provisions and procedures substantially to the
effect set forth in Section 6 hereof with respect to all parties to be indemnified pursuant to said Section. The above shall be done at each closing under such underwriting or similar agreement, or as and to the extent required thereunder.

 Each Holder agrees by acquisition of such Registrable Securities that, upon receipt of written notice from the Company of the happening
of any event of the kind described in Section 4(b)(11), such Holder will forthwith discontinue disposition of such Registrable Securities covered by such Registration Statement until such Holder’s receipt of the copies of the
supplemented or amended Registration Statement contemplated by Section 4(b)(14), or until it is advised in writing by the Company that the use of the applicable Prospectus may be resumed, and has received copies of any additional or
supplemental filings that are incorporated or deemed to be incorporated by reference in such prospectus (such period during which disposition is discontinued being an “Interruption Period”), and, if so directed by the
Company, such Holder will deliver to the Company all copies of the Prospectus covering such Registrable Securities current at the time of receipt of such notice. 

Section 5. Registration Expenses. 

(a) Expenses Payable by the Company. The Company shall bear all expenses incurred with respect to the registration or attempted
registration of the Registrable Securities pursuant to Sections 2 or 3 of this Agreement as provided herein. Such expenses shall include, without limitation, (i) all registration, qualification and filing fees (including, without
limitation, (A) fees with respect to compliance with the rules and regulation of the Commission, (B) fees with respect to filings required to be made with the national securities exchange or national market system on which the Common Stock is then
traded or quoted and (C) fees and expenses of compliance with state securities or blue sky laws (including, without limitation, fees and disbursements of counsel for the Company or the underwriters, or both, in connection with blue sky
qualifications of Registrable Securities)), (ii) messenger and delivery expenses, word processing, duplicating and printing expenses (including without limitation, expenses of printing certificates for Registrable Securities in a form eligible for
deposit with The Depository Trust Company, printing preliminary prospectuses, prospectuses, prospectus supplements, including those delivered to or for the account of the Holders and provided in this Agreement, and blue sky memoranda), (iii) fees
and disbursements of counsel for the Company, (iv) fees and disbursements of all independent certificated public accountants for the Company (including, 

  
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without limitation, the expense of any “comfort letters” required by or incident to such performance), (v) all out-of-pocket expenses of the Company (including without limitation,
expenses incurred by the Company and the officers, directors, and employees of the Company performing legal or accounting duties or preparing or participating in “roadshow” presentations or of any public relations, investor relations or
other consultants or advisors retained by the Company in connection with any roadshow, including travel and lodging expenses of such roadshows), (vi) fees and expenses incurred in connection with the quotation or listing of shares of Common
Stock on any national securities exchange or other securities market, and (vii) reasonable fees and expenses of one firm of counsel for all selling Holders (which shall be chosen by the Holders of a majority of Registrable Securities to be included
in such offering). 
 (b) Expenses Payable by the Holders. Each Holder shall pay all underwriting discounts and commissions or
placement fees of underwriters or broker’s commissions incurred in connection with the sale or other disposition of Registrable Securities for or on behalf of such Holder’s account. 

Section 6. Indemnification. 

(a) Indemnification by the Company. The Company agrees to indemnify, to the fullest extent permitted by Law, each Holder, each
Affiliate of a Holder and each director, officer, employee, manager, stockholder, partner, member, counsel, agent or representative of such Holder and its Affiliates and each Person who controls any such Person (within the meaning of either Section
15 of the Securities Act or Section 20 of the Exchange Act) (collectively, “Holder Indemnified Parties”) against, and hold it and them harmless from, all losses, claims, damages, liabilities, actions, proceedings, costs
(including, without limitation, costs of preparation and attorneys’ fees and disbursements) and expenses, including expenses of investigation and amounts paid in settlement (collectively, “Losses”) arising out of, caused
by or based upon any untrue or alleged untrue statement of material fact contained in any Registration Statement, or any omission or alleged omission of a material fact required to be stated therein or necessary to make the statements therein not
misleading (a “Misstatement/Omission”), or any violation or alleged violation by the Company of the Securities Act, the Exchange Act, any state securities law, or any rule or regulation promulgated under the Securities Act,
the Exchange Act or any state securities law, except that the Company shall not be liable insofar as such Misstatement/Omission or violation is made in reliance upon and in conformity with information furnished in writing to the Company by such
Holder expressly for use therein; provided, further, that the Company shall not be liable for a Holder’s failure to deliver or cause to be delivered (to the extent such delivery is required under the Securities Act) the Prospectus
contained in the Registration Statement, furnished to it by the Company on a timely basis at or prior to the time such action is required by the Securities Act to the Person claiming a Misstatement/Omission if such Misstatement/Omission was
corrected in such Prospectus. In connection with an Underwritten Offering, the Company will indemnify such underwriters, selling brokers, dealer managers and similar securities industry professionals participating in the distribution, their officers
and directors and each Person who controls such underwriters (within the meaning of either Section 15 of the Securities Act or Section 20 of the Exchange Act) to the same extent as provided above with respect to the indemnification of the Holders.
This indemnity shall be in addition to any other indemnification arrangements to which the Company may otherwise be party. 

  
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 (b) Indemnification by the Holders. In connection with any Registration Statement in
which a Holder is participating, each such Holder agrees to indemnify, to the fullest extent permitted by Law, the Company, each director and officer of the Company and each Person who controls the Company (within the meaning of either Section 15 of
the Securities Act or Section 20 of the Exchange Act) against, and hold it harmless from, any Losses arising out of or based upon (i) any Misstatement/Omission contained in the Registration Statement, if and to the extent that such
Misstatement/Omission was made in reliance upon and in conformity with information furnished in writing by such Holder for use therein, or (ii) the failure by such Holder to deliver or cause to be delivered (to the extent such delivery is required
under the Securities Act) the Prospectus contained in the Registration Statement, furnished to it by the Company on a timely basis at or prior to the time such action is required by the Securities Act to the Person claiming a Misstatement/Omission
if such Misstatement/Omission was corrected in such Prospectus. Notwithstanding the foregoing, the obligation to indemnify will be individual (several and not joint) to each Holder and will be limited to the net amount of proceeds (net of payment of
all expenses) received by such Holder from the sale of Registrable Securities pursuant to such Registration Statement giving rise to such indemnification obligation. 

(c) Conduct of Indemnification Proceedings. In case any action, claim or proceeding shall be brought against any Person entitled
to indemnification hereunder, such indemnified party shall promptly notify each indemnifying party in writing, and such indemnifying party shall assume the defense thereof, including the employment of one counsel reasonably satisfactory to such
indemnified party and payment of all fees and expenses incurred in connection with the defense thereof. The failure to so notify such indemnifying party shall relieve such indemnifying party of its indemnification obligations to such indemnified
party to the extent that such failure to notify materially prejudiced such indemnifying party but not from any liability that it or they may have to the indemnified party for contribution or otherwise. Each indemnified party shall have the right to
employ separate counsel in such action, claim or proceeding and participate in the defense thereof, but the fees and expenses of such counsel shall be at the expense of each indemnified party unless: (i) such indemnifying party has agreed to pay
such expenses; (ii) such indemnifying party has failed promptly to assume the defense and employ counsel reasonably satisfactory to such indemnified party; or (iii) the named parties to any such action, claim or proceeding (including any impleaded
parties) include both such indemnified party and such indemnifying party or an Affiliate or Controlling person of such indemnifying party, and such indemnified party shall have been advised in writing by counsel that either (x) there may be one or
more legal defenses available to it which are different from or in addition to those available to such indemnifying party or such Affiliate or Controlling person or (y) a conflict of interest may exist if such counsel represents such indemnified
party and such indemnifying party or its Affiliate or Controlling person; provided, however, that such indemnifying party shall not, in connection with any one such action or proceeding or separate but substantially similar or related actions
or proceedings in the same jurisdiction arising out of the same general allegations or circumstances, be responsible hereunder for the fees and expenses of more than one separate firm of attorneys (in addition to any local counsel), which counsel
shall be designated by such indemnified party or, in the event that such indemnified party is a Holder Indemnified Party, by the Holders of a majority of the Registrable Securities included in the subject Registration Statement. 

  
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 No indemnifying party shall be liable for any settlement effected without its written consent
(which consent may not be unreasonably delayed or withheld). Each indemnifying party agrees that it will not, without the indemnified party’s prior written consent, consent to entry of any judgment or settle or compromise any pending or
threatened claim, action or proceeding in respect of which indemnification or contribution may be sought hereunder unless the foregoing contains an unconditional release, in form and substance reasonably satisfactory to the indemnified parties, of
the indemnified parties from all liability and obligation arising therefrom. The indemnifying party’s liability to any such indemnified party hereunder shall not be extinguished solely because any other indemnified party is not entitled to
indemnity hereunder. 
 (d) Survival. The indemnification provided for under this Agreement will (i) remain in full force
and effect regardless of any investigation made by or on behalf of the indemnified party or any officer, director or Controlling Person of such indemnified party, (ii) survive the transfer of securities and (iii) survive the termination of this
Agreement. 
 (e) Right to Contribution. If the indemnification provided for in this Section 6 is unavailable to, or
insufficient to hold harmless, an indemnified party under Section 6(a) or Section 6(b) above in respect of any Losses referred to in such Sections, then each applicable indemnifying party shall have an obligation to contribute to the
amount paid or payable by such indemnified party as a result of such Losses in such proportion as is appropriate to reflect the relative fault of the Company, on the one hand, and of the Holder, on the other, in connection with the
Misstatement/Omission or violation which resulted in such Losses, taking into account any other relevant equitable considerations. The amount paid or payable by a party as a result of the Losses referred to above shall be deemed to include, subject
to the limitations set forth in Section 6(c) above, any legal or other fees or expenses reasonably incurred by such party in connection with any investigation, lawsuit or legal or administrative action or proceeding. 

The relative fault of the Company, on the one hand, and of the Holder, on the other, shall be determined by reference to, among other things,
whether the relevant Misstatement/Omission or violation relates to information supplied by the Company or by the Holder and the parties’ relative intent, knowledge, access to information and opportunity to correct or prevent such
Misstatement/Omission or violation. 
 The Company and each Holder agree that it would not be just and equitable if contribution pursuant to
this Section 6(e) were determined by pro rata allocation or by any other method of allocation which does not take account of the equitable considerations referred to above. Notwithstanding the provisions of this Section 6(e), a Holder
shall not be required to contribute any amount in excess of the amount by which (i) the amount (net of payment of all expenses) at which the securities that were sold by such Holder and distributed to the public were offered to the public exceeds
(ii) the amount of any damages which such Holder has otherwise been required to pay by reason of such Misstatement/Omission or violation. 

No Person guilty of fraudulent misrepresentation (within the meaning of Section 11(f) of the Securities Act) shall be entitled to contribution
from any Person who was not guilty of such fraudulent misrepresentation. 

  
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 Section 7. Rules 144 and 144A. The Company shall timely file the reports required to
be filed by it under the Securities Act and the Exchange Act (including but not limited to the reports under Sections 13 and 15(d) of the Exchange Act referred to in subparagraph (c) of Rule 144 adopted by the Commission under the Securities Act)
and the rules and regulations adopted by the Commission thereunder (or, if the Company is not required to file such reports, it will, upon the request of any Holder, make publicly available other information) and will take such further action as any
Holder may reasonably request, all to the extent required from time to time to enable such Holder to sell Registrable Securities without registration under the Securities Act within the limitation of the exemptions provided by (a) Rule 144 and Rule
144A under the Securities Act, as such Rules may be amended from time to time, or (b) any similar rule or regulation hereafter adopted by the Commission. 

Section 8. Covenants of Holders. Each of the Holders hereby agrees (a) to cooperate with the Company and to furnish to the Company
all such information regarding such Holder, its ownership of Registrable Securities and the disposition of such securities in connection with the preparation of the Registration Statement and any filings with any state securities commissions as the
Company may reasonably request, (b) to the extent required by the Securities Act, to deliver or cause delivery of the Prospectus contained in the Registration Statement, any amendment or supplement thereto, to any purchaser of the Registrable
Securities covered by the Registration Statement from the Holder and (c) if requested by the Company, to notify the Company of any sale of Registrable Securities by such Holder. 

Section 9. Board and Information Rights; Other Covenants. 

(a) Board Composition. The parties agree that so long as Gulfport beneficially owns (as defined in Rule 13d-3 promulgated
under the Exchange Act (“Rule 13d3”)) more than 10% of the then issued and outstanding Common Stock, (i) the business and affairs of the Company shall be managed through a Board consisting of up to seven Directors, of which
three Directors shall be Independent Directors (subject to any phase-in rules) and (ii) Gulfport shall have the right to designate one Director (“Gulfport Director”). For purposes of this Agreement, in determining the
percentage of shares of Common Stock beneficially owned by Gulfport, only shares of Common Stock then issued and outstanding shall be included in the denominator and any Equity Right that has not then been exercised, converted or exchanged shall be
excluded from the denominator regardless of the application of the beneficial ownership rules of Rule 13d-3. 
 (b) Company Action
to Nominate and Elect the Gulfport Director. Subject to Section 9(g), the Company shall cause the initial Gulfport Director designated in accordance with Section 9(a) to be appointed to the Board prior to the completion of the
Common Stock Offering and thereafter to use its commercially reasonable efforts to cause the Gulfport Director to be nominated for election to the Board at each annual meeting of the Company’s stockholders at which directors are to be elected
(or by stockholder consents in lieu of a meeting, if applicable), shall solicit proxies (or stockholder consents in lieu of a meeting, if applicable) in favor thereof, and at each annual meeting of the Company’s stockholders at which Directors
are to be elected, shall recommend that the Company’s stockholders elect to the Board each such individual nominated for election at such annual meeting of the Company’s stockholders (or stockholder consents in lieu of a meeting, if
applicable). So long as Gulfport has the right to designate a Gulfport Director under this Agreement, if for any reason the Gulfport Director is not elected to the Board by the Company’s stockholders, Gulfport will be entitled to the Board
Advisor rights set forth in Section 9(c). 

  
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 (c) Board Advisor Rights. 

(1) So long as Gulfport has the right to designate a Gulfport Director under this Agreement and there is no Gulfport Director in office,
Gulfport shall have the right to appoint one individual as an advisor to the Board (the “Board Advisor”). The Board Advisor shall be entitled to attend meetings of the Board and any meetings of any committee of the Board and
to receive all information provided to the members of the Board and any committee thereof (including minutes of previous meetings of the Board and any committee thereof). The Board Advisor shall advise and counsel the Board on the business and
operations of the Company as requested by the Board. The Board Advisor is not, and shall not have the duties and responsibilities of, a Director, and the terms “director” or “member of the Board” as used in this Agreement shall
not be deemed to mean or include the Board Advisor. Without limiting the generality of the foregoing, the Board Advisor shall not be entitled to vote on any matter presented for action by the Board. The Board Advisor may be given such designations
(including without limitation “advisory director”) as the Board may from time to time determine. For the avoidance of doubt, no Board Advisor shall have fiduciary, quasi-fiduciary or other similar obligations to the Company or the
Company’s stockholders, but shall be subject to all applicable securities Laws and to the confidentiality obligations applicable to Gulfport under Section 9(k)(2). 

(2) Gulfport shall have the right, in its sole discretion, to appoint the Board Advisor and to remove the Board Advisor, as well as the
right, in its sole discretion, to fill vacancies created by reason of the death, removal or resignation thereof. Gulfport shall have the right at any time to remove (with or without cause) the Board Advisor. In the event there is a vacancy in the
Board Advisor position at any time and for any reason (whether as a result of death, disability, retirement, resignation or removal of the Board Advisor), Gulfport shall have the right to designate a different individual to replace such Board
Advisor. 
 (d) Gulfport Designation, Removal and Vacancies. In the event a vacancy exists with respect to any Gulfport
Director position on the Board at any time that Gulfport has the right to designate a Gulfport Director under this Agreement (whether as a result of death, disability, retirement, resignation, removal or otherwise), Gulfport shall have the right, in
its sole discretion, to designate a different individual to replace such Gulfport Director and the Company shall nominate such Gulfport Director for election to the Board as provided in Section 9(b). 

(e) Committees. For so long as Gulfport has the right to designate a Gulfport Director, any committee composed of Directors
shall consist of at least one Gulfport Director provided that such Gulfport Director satisfies all requirements under the applicable rules and regulations of the SEC, the Marketplace Rules and the Governing Documents of the Company to serve on such
committee (including being “independent,” if applicable). 
 (f) Election Not to Exercise Designation
Rights. Notwithstanding anything in this Section 9 to the contrary, this Section 9 confers upon Gulfport the right, but not the obligation, to designate the Gulfport Director, and Gulfport may, at its option, elect not to
exercise any such right to designate the Gulfport Director. 

  
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 (g) Qualifications and Information. Notwithstanding anything to the contrary
contained in this Agreement, each Gulfport Director designated by Gulfport shall, (A) in the reasonable judgment of the Board, have the requisite skill and experience to serve as a director of a publicly traded company, and (B) not be prohibited or
disqualified from serving as a director of Company pursuant to the applicable rules and regulations of the SEC and the Marketplace Rules or by applicable Law. The Board may adopt additional reasonable standards of skill and experience desired of
potential candidates for nomination to the Board, which will be reflected in a charter of a committee of the Board or other similar document. Gulfport shall timely provide the Company with accurate and complete information relating to any Gulfport
Director that may be required to be disclosed by the Company under the Exchange Act. In addition, at the Company’s request, Gulfport shall cause any Gulfport Director to complete and execute the Company’s standard Director and Officer
Questionnaire prior to being admitted to the Board or any committee thereof or standing for reelection at an annual meeting of the Company’s stockholders or at such other time as may be requested by the Company. 

(h) Director Insurance and Indemnification. The Company will obtain and maintain directors’ liability insurance and will
at all times exercise the powers granted to it by its Governing Documents, and by applicable Law to indemnify and hold harmless to the fullest extent permitted by applicable Law present or former directors and officers of the Company against any
threatened or actual claim, action, suit, proceeding or investigation made against them arising from their service in such capacities (or service in such capacities on behalf of the Company or for another enterprise at the request of the Company).

 (i) Expenses of Directors. The Company will promptly reimburse the Gulfport Director or Board Advisor for all of his or
her reasonable out-of-pocket expenses incurred in attending each meeting of the Board or any committee thereof consistent with the Company’s policies. 

(j) Information Rights. In addition to, and without limiting any rights that Gulfport may have with respect to inspection of
the books and records of the Company under applicable Laws, the Company shall furnish to Gulfport, the following information, so long as Gulfport owns shares of Common Stock: 

(1) Annual Reports. As soon as available, and in any event within 30 days after the end of each fiscal year, the
substantially complete balance sheet of the Company as at the end of each such fiscal year and the substantially complete statements of operations and changes in its stockholders’ equity for such year, in each case based on reasonable
estimates, and within 50 days after the end of each fiscal year, or such later date as is reasonably possible, the audited balance sheets and statements referenced above accompanied by the certification of independent certified public accountants of
recognized national standing selected by the Board, to the effect that, except as set forth therein, such financial statements have been prepared in accordance with GAAP, applied on a basis consistent with prior years and fairly present in all
material respects the financial condition of the Company as of the dates thereof and the results of its operations and changes in its stockholders’ equity for the periods covered thereby.

  
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 (2) Quarterly Reports. As soon as available, and in any event within 20 days after
the end of each fiscal quarter, the substantially complete balance sheet of the Company at the end of such quarter and the substantially complete statements of operations and changes in its stockholders’ equity for such quarter, in each case
based on reasonable estimates and in reasonable detail and all prepared in accordance with GAAP, consistently applied, and, to the extent possible, certified by the Chief Financial Officer of the Company.

(3) Information Required as a Result of Stockholder’s Filing Status. The Company acknowledges that the Stockholder is a
Large Accelerated Filer and agrees to cooperate, provide sufficient access and provide all information necessary for the Stockholder to satisfy its financial reporting and Exchange Act reporting obligations as a Large Accelerated Filer. In
accordance therewith, upon a request in writing by the Stockholder that it requires certain financial information related to the Company in connection with the Stockholder’s filing obligations under the Exchange Act, including, but not limited
a request for the information included in or described in the annual or quarterly reports set forth in Section 9(j)(1) and Section 9(j)(2) as well as supporting information and schedules, the Company shall respond with such requested
information in a timely manner, but in any event no less than five (5) business days from receipt of the written request with the information requested. If for any reason the Company does not have the requested information available to it, it will
respond to the Stockholder in writing within two (2) business days from receipt of the written request specifying the reasons for unavailability of the information and a date upon which it believes the information will be available. When such
requested information becomes available, the Company shall promptly send it to the Stockholder. In addition, in the event that the Stockholder’s financial reporting and Exchange Act reporting obligations require it to audit or perform other
accounting or review procedures with respect to the Company’s financials or any information included therein, the Company shall, and shall cause its officers, Directors and employees to afford the Stockholder and its representatives, during
normal business hours and upon reasonable notice, access at all reasonable times to its officers, employees, auditors, properties, offices, plants and other facilities and to all books and records, necessary to perform any such audit or other
accounting or review procedures. Such access and information shall be provided within the time period reasonably necessary to allow the Stockholder to conduct and complete its audit in a timely fashion and to timely include compliant financials in
its Exchange Act reports and to timely file its Exchange Act reports. 
 (k) Inspection Rights.

(1) The Company shall, and shall cause its officers, Directors and employees to afford Gulfport, for so long as Gulfport has the right
to designate a Gulfport Director or has Board Advisor rights pursuant to Section 9(c), the opportunity to consult with its officers from time to time regarding the Company’s affairs, finances and accounts as Gulfport may reasonably
request upon reasonable notice. The right set forth in this Section 9(k) shall not, and is not intended to, limit any rights which Gulfport may have with respect to the books and records of the Company, or to inspect its properties or discuss
its affairs, finances and accounts under the laws of the jurisdiction in which the Company is incorporated. 
 (2) Gulfport agrees
that it will keep confidential and will not disclose, divulge or use for any purpose, other than to monitor its investment in the Company, any 

  
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confidential information obtained from the Company pursuant to the terms of this Agreement, unless such confidential information (A) is known or becomes known to the public in general (other than
as a result of a breach of this Section 9(k)(2) by Gulfport), (B) is or has been independently developed or conceived by Gulfport without use of the Company’s confidential information or (C) is or has been made known or disclosed to
Gulfport by a third party without a breach of any obligation of confidentiality such third party may have to the Company; provided, however, that Gulfport may disclose confidential information (a) to its attorneys, accountants, consultants,
and other professionals to the extent needed for their services in connection with monitoring its investment in the Company, (b) to any officer, director or employees of Gulfport in the ordinary course of business, or (c) as may otherwise be
required by law, provided that Gulfport takes reasonable steps to minimize the extent of any such required disclosure and subject, in the case of clauses (a) and (b) to each recipient’s obligation to maintain the confidentiality of that
information as if such recipient was a party hereto. 
 (3) The Company acknowledges that Gulfport is in the oil and gas business and
therefore is always reviewing information of many oil and gas companies and properties which compete directly or indirectly with those of the Company. Subject to its agreement to only use confidential information to monitor its investment in the
Company, nothing in this Agreement shall preclude or in any way restrict Gulfport from investing or participating in any particular enterprise whether or not such enterprise has products or services which compete with those of the Company. 

(l) Other Contributions. If Mammoth Holdings or any of its Affiliates proposes to contribute, transfer, assign, convey or
otherwise deliver (collectively “Transfer”) to the Company or any of its Affiliates all or any of the equity interests in any entity in which Gulfport also has an equity interest, including but not limited to Stingray
Cementing LLC, Stingray Energy Services LLC and Sturgeon Holdings LLC, Gulfport will have the right, but not the obligation, to Transfer its equity interests in such entities on the same economic terms proportionate to its interest in the applicable
entities. 
 Section 10. Miscellaneous. 

(a) No Inconsistent Agreements. The Company will not hereafter enter into any agreement with respect to its securities that is
inconsistent with, adversely effects or violates the rights granted to the Holders in this Agreement; it being understood that the granting of additional demand or piggyback registration rights with respect to capital stock of the Company shall not
be deemed adverse to the rights granted to Holders hereunder so long as they do not (x) reduce, except as set forth in this Agreement, the amount of Registrable Securities that any Holder may include in any registration contemplated in this
Agreement or (y) restrict or otherwise limit the exercise by any Holder of its rights hereunder. 
 (b) Remedies. Any Person
having rights under any provision of this Agreement will be entitled to enforce such rights specifically to recover damages caused by reason of any breach of any provision of this Agreement and to exercise all other rights granted by law. The
parties hereto agree and acknowledge that money damages may not be an adequate remedy for any breach of the provisions of this Agreement and hereby agree to waive the defense in any action for specific performance or injunctive relief that a remedy
at law would be 

  
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adequate. Accordingly, any party may in its sole discretion apply to any court of law or equity of competent jurisdiction (without posting any bond or other security) for specific performance and
for other injunctive relief in order to enforce or prevent violation of the provisions of this Agreement. 
 (c) Amendments and
Waivers. This Agreement contains the entire understanding of the parties with respect to its subject matter and supersedes any and all prior agreements, and neither it nor any part of it may in any way be altered, amended, extended, waived,
discharged or terminated except by a written agreement that specifically references this Agreement and the provisions to be so altered, amended, extended, waived, discharged or terminated is signed by each of the parties hereto and specifically
states that it is intended to alter, amend, extend, waive, discharge or terminate this agreement or a provision hereof. 

(d) Successors and Assigns. This Agreement shall be binding upon and inure to the benefit of the parties hereto and their
respective successors and assigns. Except for the Board and information rights contained in Section 9 (which rights are not transferable), the Holders may assign all rights under this Agreement; provided, however, that no Holder may
transfer or assign its rights hereunder unless such transferring Holder shall, prior to any such transfer, obtain from the transferee a joinder agreement in a form reasonably satisfactory to the Company and deliver a copy of such joinder agreement
to the Company and the Holders. Only persons (other than the Stockholder party hereto) that execute a joinder agreement shall be deemed to be Holders. The Company shall be given written notice by the transferring Holder at the time of the transfer
stating the name and address of the transferee and identifying the Registrable Securities transferred; provided, that, failure to give such notice shall not affect the validity of such transfer or assignment. 

(e) Severability. In the event that any one or more of the provisions contained herein, or the application thereof in any
circumstances, is held invalid, illegal or unenforceable in any respect for any reason, the validity, legality and enforceability of any such provision in every other respect and of the remaining provisions hereof shall not be in any way impaired or
affected, it being intended that the rights and privileges of the parties hereto shall be enforceable to the fullest extent permitted by Law. 

(f) Counterparts. This Agreement may be executed in any number of counterparts, any one of which need not contain the signatures
of more than one party, but each of which when so executed shall be deemed to be an original and all such counterparts taken together shall constitute one and the same Agreement. 

(g) Descriptive Headings: Interpretation. The descriptive headings of this Agreement are inserted for convenience of reference
only and shall not limit or otherwise affect the meaning hereof. The use of the word “including” in this Agreement shall be by way of example rather than by limitation. 

(h) Notices. All notices, requests and other communications provided for or permitted to be given under this Agreement must be in
writing and shall be given by personal delivery, by certified or registered United States mail (postage prepaid, return receipt requested), by a nationally recognized overnight delivery service for next day delivery, or by facsimile transmission, as
follows (or to such other address as any party may give in a notice given in accordance with the provisions hereof): 

  
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 If to the Company: 

Mammoth Energy Services, Inc. 

4727 Gaillardia Parkway, Suite 200 

Oklahoma City, OK 73142 

Attention: Chief Financial Officer 

Facsimile: (405) 242-4203 
 If to
the Stockholder: 
 Gulfport Energy Corporation 

4313 N. May Avenue, Suite 100 

Oklahoma City, OK 73134 

Attention: Chief Financial Officer 

Facsimile: (405) 848-8816 
 All notices, requests
or other communications will be effective and deemed given only as follows: (i) if given by personal delivery, upon such personal delivery, (ii) if sent by certified or registered mail, on the fifth business day after being deposited in the United
States mail, (iii) if sent for next day delivery by overnight delivery service, on the date of delivery as confirmed by written confirmation of delivery, (iv) if sent by facsimile, upon the transmitter’s confirmation of receipt of such
facsimile transmission, except that if such confirmation is received after 5:00 p.m. (in the recipient’s time zone) on a business day, or is received on a day that is not a business day, then such notice, request or communication will not be
deemed effective or given until the next succeeding business day. Notices, requests and other communications sent in any other manner, including by electronic mail, will not be effective. 

(i) GOVERNING LAW; SUBMISSION TO JURISDICTION. THIS AGREEMENT SHALL BE DEEMED TO BE MADE IN AND IN ALL RESPECTS SHALL BE
INTERPRETED, CONSTRUED AND GOVERNED BY AND IN ACCORDANCE WITH THE LAW OF THE STATE OF DELAWARE WITHOUT REGARD TO THE CONFLICT OF LAW PRINCIPLES THEREOF. The parties hereby irrevocably submit to the jurisdiction of any federal court located in the
State of Delaware or any Delaware state court solely in respect of the interpretation and enforcement of the provisions of this Agreement, and in respect of the transactions contemplated hereby, and hereby waive, and agree not to assert, as a
defense in any action, suit or proceeding for the interpretation or enforcement hereof that it is not subject thereto or that such action, suit or proceeding may not be brought or is not maintainable in said courts or that the venue thereof may not
be appropriate or that this Agreement or any such document may not be enforced in or by such courts, and the parties hereto irrevocably agree that all claims with respect to such action or proceeding shall be heard and determined in such a Delaware
state or federal court. The parties hereby consent to and grant any such court jurisdiction over the person of such parties and over the subject matter of such dispute and agree that mailing of process or other papers in connection with any such
action or proceeding in the manner provided in the Section on notices above or in such other manner as may be permitted by law shall be valid and sufficient service thereof. 

  
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 EACH PARTY ACKNOWLEDGES AND AGREES THAT ANY CONTROVERSY WHICH MAY ARISE UNDER THIS AGREEMENT IS
LIKELY TO INVOLVE COMPLICATED AND DIFFICULT ISSUES, AND THEREFORE EACH SUCH PARTY HEREBY IRREVOCABLY AND UNCONDITIONALLY WAIVES ANY RIGHT SUCH PARTY MAY HAVE TO A TRIAL BY JURY IN RESPECT OF ANY LITIGATION DIRECTLY OR INDIRECTLY ARISING OUT OF OR
RELATING TO THIS AGREEMENT, OR THE TRANSACTIONS CONTEMPLATED BY THIS AGREEMENT. EACH PARTY CERTIFIES AND ACKNOWLEDGES THAT (I) NO REPRESENTATIVE, AGENT OR ATTORNEY OF ANY OTHER PARTY HAS REPRESENTED, EXPRESSLY OR OTHERWISE, THAT SUCH OTHER PARTY
WOULD NOT, IN THE EVENT OF LITIGATION, SEEK TO ENFORCE THE FOREGOING WAIVER, (II) EACH PARTY UNDERSTANDS AND HAS CONSIDERED THE IMPLICATIONS OF THIS WAIVER, (III) EACH PARTY MAKES THIS WAIVER VOLUNTARILY, AND (IV) EACH PARTY HAS BEEN INDUCED TO
ENTER INTO THIS AGREEMENT BY, AMONG OTHER THINGS, THE MUTUAL WAIVERS AND CERTIFICATIONS IN THIS SECTION. 
 (j) Entire
Agreement. This Agreement is intended by the parties as a final expression of their agreement and intended to be a complete and exclusive statement of the agreement and understanding of the parties hereto in respect of the subject matter
contained herein. This Agreement supersedes all prior agreements and understandings between the parties with respect to such subject matter. 

(k) Limited Recourse. Each of the parties hereto covenants, agrees and acknowledges that no Person other than the Company and
the Holders shall have any obligation hereunder and that no recourse under this Agreement or under any documents or instruments delivered in connection herewith or therewith shall be had against any former, current or future director, officer,
employee, agent, general or limited partner, manager, member, stockholder or Affiliate of any of the Holders or the Company or any former, current or future director, officer, employee, agent, general or limited partner, manager, member, stockholder
or Affiliate of any of the foregoing, whether by the enforcement of any assessment or by any legal or equitable proceeding, or by virtue of any applicable Law, it being expressly agreed and acknowledged that no personal liability whatsoever shall
attach to, be imposed on or otherwise be incurred by any former, current or future director, officer, employee, agent, general or limited partner, manager, member, stockholder or Affiliate of any of the Holders or the Company or any former,
current or future director, officer, employee, agent, general or limited partner, manager, member, stockholder or Affiliate of any of the foregoing, as such, for any obligations of the Holders or the Company under this Agreement or any documents or
instruments delivered in connection herewith or therewith or for any claim based on, in respect of or by reason of such obligation or its creation, except for any transferee or assignee of the Holders hereunder. 

[Signature page follows] 

  
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 IN WITNESS WHEREOF, the parties hereto have or have caused this Investor Rights Agreement
to be duly executed as of the date first above written. 
  

			
	 COMPANY:
  

MAMMOTH ENERGY SERVICES, INC.

		
	 By:
	 	 /s/ Mark Layton

	 Name:
	 	 Mark Layton

	 Title:
	 	 Chief Financial Officer

	
	 STOCKHOLDER:
  

GULFPORT ENERGY CORPORATION

		
	 By:
	 	 /s/ Aaron Gaydosik

	 Name:
	 	 Aaron Gaydosik

	 Title:
	 	Chief Financial Officer


 Signature Page to Investor Rights Agreement