Document:

First Priority Registration Rights Agreement

 Exhibit 4.5 
 Execution Version 
 REGISTRATION RIGHTS AGREEMENT 

by and among 
 Endeavour International Corporation 
 the Guarantors party hereto,

 and 
 Citigroup Global Markets Inc., 
 as representative of the Initial
Purchasers 
 Dated as of February 23, 2012 

 REGISTRATION RIGHTS AGREEMENT 

This Registration Rights Agreement (this “Agreement”) is made and entered into as of February 23, 2012, by
and among Endeavour International Corporation, a Nevada corporation (the “Company” or the “Issuer”), the entities listed on Schedule A hereto (collectively, the “Guarantors”),
and Citigroup Global Markets Inc., as representative of the initial purchasers listed on Schedule I to the Purchase Agreement (each an “Initial Purchaser” and, collectively, the “Initial
Purchasers”), each of whom has agreed to purchase the Issuer’s 12% First Priority Notes due 2018 (the “Initial Notes”), fully and unconditionally guaranteed by the Guarantors (the
“Guarantees”) pursuant to the Purchase Agreement (as defined below). The Initial Notes and the Guarantees are herein collectively referred to as the “Initial Securities.” 

This Agreement is made pursuant to the Purchase Agreement, dated February 13, 2012 (the “Purchase
Agreement”), by and among the Issuers, the Guarantors and the Initial Purchasers (i) for the benefit of the Initial Purchasers and (ii) for the benefit of the holders from time to time of Initial Securities, including the
Initial Purchasers. In order to induce the Initial Purchasers to purchase the Initial Securities, the Issuer has agreed to provide the registration rights set forth in this Agreement. The execution and delivery of this Agreement is a condition to
the obligations of the Initial Purchasers set forth in Section 6(l) of the Purchase Agreement. 
 The parties hereby agree
as follows: 
 SECTION 1. Definitions. As used in this Agreement, the following capitalized terms shall have the
following meanings: 
 Additional Interest: As defined in Section 5 hereof. 

Advice: As defined in Section 6(c) hereof. 

Affiliate: As defined in Rule 144 promulgated by the Commission. 

Agreement: As defined in the preamble hereto. 
 Blackout Period: As defined in the last paragraph of Section 4(a) hereof. 
 Broker-Dealer: Any broker or dealer registered under the Exchange Act. 
 Business Day: Any day other than a Saturday, Sunday or U.S. federal holiday or a day on which banking institutions or trust companies located in New York, New York are authorized or
obligated to be closed. 
 Closing Date: The date of this Agreement. 

Commission: The Securities and Exchange Commission. 

Consummate: A registered Exchange Offer shall be deemed “Consummated” for purposes of this Agreement upon
the occurrence of (i) the filing and effectiveness under the 

 
Securities Act of the Exchange Offer Registration Statement relating to the Exchange Securities to be issued in the Exchange Offer, (ii) the maintenance of such Registration Statement
continuously effective and the keeping of the Exchange Offer open for a period not less than the minimum period required pursuant to Section 3(b) hereof, and (iii) the delivery by the Issuer to the Registrar under the Indenture of Exchange
Securities in the same aggregate principal amount as the aggregate principal amount of Initial Securities that were tendered by Holders thereof pursuant to the Exchange Offer. 
 controlling person: As defined in Section 8(a) hereof. 

Exchange Act: The Securities Exchange Act of 1934, as amended. 

Exchange Date: The date that Exchange Securities are delivered by the Issuer to the Registrar under the Indenture of
Exchange Securities in the same aggregate principal amount as the aggregate principal amount of Initial Securities that were tendered by Holders thereof pursuant to the Exchange Offer. 

Exchange Deadline: As defined in Section 3(b) hereof. 

Exchange Offer: An offer registered under the Securities Act by the Issuer and the Guarantors pursuant to a
Registration Statement pursuant to which the Issuer offers the Holders of all outstanding Transfer Restricted Securities the opportunity to exchange all such outstanding Transfer Restricted Securities held by such Holders for Exchange Securities in
an aggregate principal amount equal to the aggregate principal amount of the Transfer Restricted Securities tendered in such exchange offer by such Holders with terms that are identical in all respects to the Transfer Restricted Securities (except
that Exchange Securities will not contain terms with respect to any increase in annual interest rate as described herein and the transfer restrictions). 
 Exchange Offer Registration Statement: The Registration Statement relating to the Exchange Offer, including the related Prospectus, as defined in Section 3(a) hereof. 

Exchange Securities: The 12% First Priority Notes due 2018, of the same series under the Indenture as the Initial
Securities, including the Guarantees, to be offered to Holders in exchange for Transfer Restricted Securities pursuant to this Agreement. 
 FINRA: The Financial Industry Regulatory Authority, Inc., an independent regulatory organization (formerly National Association of Securities Dealers or NASD). 

Guarantees: As defined in the preamble hereto. 
 Holder: As defined in Section 2(b) hereof. 

Indemnified Holder: As defined in Section 8(a) hereof. 

  
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 Indenture: The Indenture, dated as of February 23, 2012, by and
among the Issuers, the Guarantors and Wells Fargo Bank, National Association, as trustee (the “Trustee”), pursuant to which the Initial Securities and the Exchange Securities are to be issued, as such Indenture is amended or
supplemented from time to time in accordance with the terms thereof. 
 Initial Notes: As defined in the
preamble hereto. 
 Initial Placement: The issuance and sale by the Issuer of the Initial Securities to the
Initial Purchasers pursuant to the Purchase Agreement. 
 Initial Purchaser: As defined in the preamble
hereto. 
 Initial Securities: As defined in the preamble hereto. 

Issuer: As defined in the preamble hereto 
 Person: An individual, partnership, corporation, limited liability company, trust, unincorporated organization or other legal entity, or a government or agency or political
subdivision thereof. 
 Prospectus: The prospectus included in a Registration Statement, as amended or
supplemented by any prospectus supplement and by all other amendments thereto, including post-effective amendments, and all material incorporated by reference into such Prospectus. 

Registration Default: As defined in Section 5 hereof. 

Registration Statement: Any Exchange Offer Registration Statement or Shelf Registration Statement, which is filed
pursuant to the provisions of this Agreement, in each case, including the Prospectus included therein, all amendments and supplements thereto (including post-effective amendments) and all exhibits and material incorporated by reference therein.

 Securities Act: The Securities Act of 1933, as amended. 

Shelf Filing Deadline: As defined in Section 4(a) hereof. 

Shelf Registration Statement: As defined in Section 4(a)(x) hereof. 

Transfer Restricted Securities: Each Initial Security, until the earliest to occur of (a) the date on
which such Initial Security is exchanged in the Exchange Offer for an Exchange Security and entitled to be resold to the public by the Holder thereof without complying with the prospectus delivery requirements of the Securities Act; (b) the
date on which the resale of such Initial Security has been effectively registered under the Securities Act and disposed of in accordance with a Shelf Registration Statement; (c) if a Shelf Registration Statement is required to be filed in
accordance with Section 4 hereof, one year from the effective date of such Shelf 

  
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Registration Statement; (d) the date on which such Initial Security is sold pursuant to Rule 144 under circumstances in which any legend borne by such Initial Security relating to
restrictions on transferability thereof, under the Securities Act or otherwise, is removed, or the restrictive CUSIP number is redesignated as non-restrictive, by the Issuer or pursuant to the Indenture; (e) the date upon which such Initial
Security is distributed to the public by a Broker-Dealer pursuant to the “Plan of Distribution” contemplated by the Exchange Offer Registration Statement (including delivery of the Prospectus contained therein); and (f) the date on
which such Initial Security ceases to be outstanding. 
 Trust Indenture Act: The Trust Indenture Act of
1939, as amended. 
 Underwritten Registration or Underwritten Offering: A registration in which securities
of the Issuer are sold to an underwriter for reoffering to the public. 
 SECTION 2. Securities Subject to this
Agreement. 
 (a) Transfer Restricted Securities. The securities entitled to the benefits of this Agreement are the
Transfer Restricted Securities. 
 (b) Holders of Transfer Restricted Securities. A Person is deemed to be a holder of
Transfer Restricted Securities (a “Holder”) whenever such Person owns Transfer Restricted Securities. 

SECTION 3. Registered Exchange Offer. 
 (a) Unless the Exchange Offer shall not be permissible under applicable law or Commission policy (after the procedures set forth in Section 6(a) hereof have been complied with), the Issuer and the
Guarantors shall (i) cause to be filed with the Commission sufficiently promptly so as to avoid a Registration Default with respect to the Exchange Offer, a Registration Statement under the Securities Act relating to the Exchange Securities and
the Exchange Offer (the “Exchange Offer Registration Statement”), (ii) use their commercially reasonable efforts to cause such Exchange Offer Registration Statement to become effective under the Securities Act
sufficiently promptly so as to avoid a Registration Default with respect to the Exchange Offer, (iii) in connection with the foregoing, file (A) all pre-effective amendments to such Exchange Offer Registration Statement as may be necessary
in order to cause such Exchange Offer Registration Statement to become effective, (B) if applicable, a post-effective amendment to such Exchange Offer Registration Statement pursuant to Rule 430A under the Securities Act and (C) cause all
necessary filings in connection with the registration and qualification of the Exchange Securities to be made under the state securities or blue sky laws of such jurisdictions as are necessary to permit Consummation of the Exchange Offer, and
(iv) upon the effectiveness of such Exchange Offer Registration Statement, commence the Exchange Offer. The Exchange Offer shall be on the appropriate form permitting registration of the Exchange Securities to be offered in exchange for the
Transfer Restricted Securities and to permit resales of Transfer Restricted Securities held by Broker-Dealers as contemplated by Section 3(c) hereof. 

  
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 (b) The Issuer and the Guarantors shall cause the Exchange Offer Registration Statement to
be effective continuously and shall keep the Exchange Offer open for a period of not less than the minimum period required under applicable federal and state securities laws to Consummate the Exchange Offer; provided, however, that in no
event shall such period be less than 20 Business Days after the date notice of the Exchange Offer is mailed to the Holders. The Issuer shall cause the Exchange Offer to comply with all applicable federal and state securities laws. No securities
other than the Exchange Securities shall be included in the Exchange Offer Registration Statement. The Issuer and the Guarantors shall use commercially reasonable efforts to cause the Exchange Offer to be Consummated on the earliest practicable date
after the Exchange Offer Registration Statement has become effective, but in no event later than 360 days after the Closing Date (or if such 360th day is not a Business Day, the next succeeding Business Day) (such 360th day herein referred to as the
“Exchange Deadline”). 
 (c) The Issuer shall indicate in a “Plan of Distribution” section
contained in the Prospectus forming a part of the Exchange Offer Registration Statement that any Broker-Dealer who holds Initial Securities that are Transfer Restricted Securities that were acquired for its own account as a result of market-making
activities or other trading activities (other than Transfer Restricted Securities acquired directly from the Issuers), may exchange such Initial Securities pursuant to the Exchange Offer; however, such Broker-Dealer may be deemed to be an
“underwriter” within the meaning of the Securities Act and must, therefore, deliver a prospectus meeting the requirements of the Securities Act in connection with any resales of the Exchange Securities received by such Broker-Dealer in the
Exchange Offer, which prospectus delivery requirement may be satisfied by the delivery by such Broker-Dealer of the Prospectus contained in the Exchange Offer Registration Statement. Such “Plan of Distribution” section shall also contain
all other information with respect to such resales by Broker-Dealers that the Commission may require in order to permit such resales pursuant thereto, but such “Plan of Distribution” shall not name any such Broker-Dealer or disclose the
amount of Initial Securities held by any such Broker-Dealer except to the extent required by the Commission. 
 The Issuer and
the Guarantors shall use commercially reasonable efforts to keep the Exchange Offer Registration Statement continuously effective, supplemented and amended as required by the provisions of Section 6(c) hereof to the extent necessary to ensure
that it is available for resales of Transfer Restricted Securities acquired by Broker-Dealers for their own accounts as a result of market-making activities or other trading activities, and to ensure that it conforms with the requirements of this
Agreement, the Securities Act and the policies, rules and regulations of the Commission as announced from time to time, for a period ending on the earlier of (i) 180 days from the date on which the Exchange Offer Registration Statement is
declared effective and (ii) the date on which a Broker-Dealer is no longer required to deliver a prospectus in connection with market-making or other trading activities. 

  
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 The Issuer shall provide sufficient copies of the latest version of such Prospectus to
Broker-Dealers promptly upon request at any time during such 180-day (or shorter as provided in the foregoing sentence) period in order to facilitate such resales. 
 SECTION 4. Shelf Registration. 
 (a) Shelf Registration. If
(i) the Issuer and the Guarantors are not required to file an Exchange Offer Registration Statement or to consummate the Exchange Offer for the Initial Securities because the Exchange Offer is not permitted by applicable law or Commission
policy; (ii) for any reason the Exchange Offer for the Initial Securities is not Consummated by the Exchange Deadline; or (iii) with respect to any Holder of Transfer Restricted Securities that is not an Affiliate of the Issuer or
Guarantors (A) such Holder is prohibited by applicable law or Commission policy from participating in the Exchange Offer, (B) such Holder may not resell the Exchange Securities acquired by it in the Exchange Offer to the public without
delivering a prospectus and that the Prospectus contained in the Exchange Offer Registration Statement is not appropriate or available for such resales by such Holder, or (C) such Holder is a Broker-Dealer and holds Initial Securities acquired
directly from the Issuer or one of its Affiliates, then, upon such Holder’s request, the Issuer and the Guarantors shall (1) if permitted by law, cause the Transfer Restricted Securities of such Holder to be reissued in a form that does
not bear any restrictive legends relating to the Securities Act or a restrictive CUSIP number so that such Securities may be sold to the public in accordance with Rule 144 under the Securities Act by a person that is not an Affiliate of the Issuer
or any of the Guarantors where no conditions of Rule 144 are then applicable (other than the holding period requirement in paragraph (d)(1)(ii) of Rule 144 so long as such holding period requirement is satisfied at such time of such reissue) and
(2) in the event the Issuer cannot or does not comply with the provisions of the foregoing clause within 20 Business Days of the later of (I) the date of receipt by the Issuer of such notice of such Holder and (II) the first to occur of
the Exchange Date and the Exchange Deadline (such later date being a “Shelf Filing Deadline”), then the Issuer and the Guarantors shall 
 (x) cause to be filed a shelf registration statement pursuant to Rule 415 under the Securities Act, which may be an amendment to the Exchange Offer Registration Statement (in either event, the
“Shelf Registration Statement”) on or prior to the Shelf Filing Deadline which Shelf Registration Statement shall provide for resales of all Transfer Restricted Securities the Holders of which shall have provided the
information required pursuant to Section 4(b) hereof; and 
 (y) use their commercially reasonable efforts to cause such
Shelf Registration Statement to be declared effective by the Commission on or before the 180th day after the Shelf Filing Deadline (or if such 180th day is not a Business Day, the next succeeding Business Day). 

  
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 The Issuer and each of the Guarantors shall keep any such Shelf Registration Statement
continuously effective, supplemented and amended as required by the provisions of Sections 6(b) and (c) hereof to the extent necessary to ensure that it is available for resales of Transfer Restricted Securities by the Holders entitled to the
benefit of this Section 4(a), and to ensure that it conforms with the requirements of this Agreement, the Securities Act and the policies, rules and regulations of the Commission as announced from time to time, for a period of one year
following the effective date of such Shelf Registration Statement (or such shorter period that will terminate when all the Transfer Restricted Securities covered by such Shelf Registration Statement have been sold pursuant to such Shelf Registration
Statement or otherwise cease to be Transfer Restricted Securities). The Issuer and each of the Guarantors shall be deemed not to have used commercially reasonable efforts to keep the Shelf Registration Statement effective during the requisite period
if the Issuer or any of the Guarantors voluntarily takes any action that would result in Holders of Transfer Restricted Securities covered thereby not being able to offer and sell such Transfer Restricted Securities during that period, unless
(X) such action is required by applicable law; or (Y) such action is taken by the Issuer or any of the Guarantors in good faith and for valid business reasons (not including avoidance of the Issuer’s or the Guarantors’
obligations hereunder) including, but not limited to, the acquisition or divestiture of assets, so long as the Issuer and the Guarantors promptly thereafter comply with the requirements of the last paragraph of Section 6(c) hereof (the period
during which the Shelf Registration Statement is not available under clauses (X) or (Y) above, the “Blackout Period”). The Blackout Period shall not exceed 45 days in any three-month period or 90 days in any
twelve-month period. 
 (b) Provision by Holders of Certain Information in Connection with the Shelf Registration Statement.
No Holder of Transfer Restricted Securities may include any of its Transfer Restricted Securities in any Shelf Registration Statement pursuant to this Agreement unless and until such Holder furnishes to the Issuer in writing, within ten Business
Days after receipt of a request therefor, such information as the Issuer may reasonably request for use in connection with any Shelf Registration Statement or Prospectus or preliminary Prospectus included therein. Each Holder as to which any Shelf
Registration Statement is being effected agrees to furnish promptly to the Issuer all information required to be disclosed in order to make the information previously furnished to the Issuer by such Holder not materially misleading. 

SECTION 5. Additional Interest. If (a) the Exchange Offer is not Consummated on or prior to the Exchange Deadline, (b) a
Shelf Registration Statement applicable to the Transfer Restricted Securities required to be filed by the terms of this Agreement is not declared effective (or does not automatically become effective) on or prior to the 180th calendar day following
any Shelf Filing Deadline (or if such 180th day is not a Business Day, the next succeeding Business Day), or (c) a Shelf Registration Statement applicable to the Transfer Restricted Securities required to be filed by the terms of this Agreement
is declared effective (or automatically becomes effective) as required but thereafter fails to remain effective or becomes unusable in connection with resales for more than 30 calendar days, excluding any Blackout Period (each such event referred to
in clauses (a) through (c) above, a “Registration Default”), the Issuer 

  
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hereby agrees that the interest rate borne by the Transfer Restricted Securities shall be increased by 0.25% per annum during the 90-day period immediately following the occurrence of any
Registration Default and shall increase by 0.25% per annum at the end of each subsequent 90-day period (“Additional Interest”), in each case until the Registration Default no longer exists; provided, however, that at no
time shall the amount of the Additional Interest exceed in the aggregate 1.0% per annum. The Issuer shall not be obligated to pay Additional Interest for more than one Registration Default at any given time. Following the cure of all
Registration Defaults, Additional Interest will cease to accrue and the interest rate on the Transfer Restricted Securities will revert to the original rate; provided, however, that, if after the date such Additional Interest ceases to
accrue, another Registration Default occurs, Additional Interest will again commence accruing pursuant to the foregoing provisions. 
 All obligations of the Issuer and the Guarantors set forth in the preceding paragraph that are outstanding with respect to any Transfer Restricted Security at the time such security ceases to be a
Transfer Restricted Security shall survive until such time as all such obligations with respect to such security shall have been satisfied in full. 
 SECTION 6. Registration Procedures. 
 (a) Exchange Offer Registration
Statement. In connection with the Exchange Offer, the Issuer and the Guarantors shall comply with all of the applicable provisions of Section 6(c) hereof, shall use commercially reasonable efforts to effect such exchange to permit the sale
of Transfer Restricted Securities being sold in accordance with the intended method or methods of distribution thereof. As a condition to its participation in the Exchange Offer pursuant to the terms of this Agreement, each Holder of Transfer
Restricted Securities shall furnish, upon the request of the Issuer, prior to the Consummation thereof, a written representation to the Issuer (which may be contained in the letter of transmittal contemplated by the Exchange Offer Registration
Statement) to the effect that (A) it is not an Affiliate of the Issuer or the Guarantors, (B) it is not engaged in, and does not intend to engage in, and has no arrangement or understanding with any Person to participate in, a distribution
(within the meaning of the Securities Act) of the Exchange Securities to be issued in the Exchange Offer and (C) it is acquiring the Exchange Securities in its ordinary course of business. In addition, all such Holders of Transfer Restricted
Securities shall otherwise cooperate in the Issuer’s preparations for the Exchange Offer. Each Holder hereby acknowledges and agrees that any Broker-Dealer and any such Holder using the Exchange Offer to participate in a distribution of the
securities to be acquired in the Exchange Offer (1) could not under Commission policy as in effect on the date of this Agreement rely on the position of the Commission enunciated in Morgan Stanley and Co., Inc. (available June 5,
1991) and Exxon Capital Holdings Corporation (available May 13, 1988), as interpreted in the Commission’s letter to Shearman & Sterling dated July 2, 1993, and similar no-action letters, and (2) must comply with
the registration and prospectus delivery requirements of the Securities Act in connection with a secondary resale transaction and that such a secondary resale transaction should be covered by an effective registration statement containing the
selling security holder information required by Item 507 or 508, as applicable, of Regulation S-K if the resales are of Exchange Securities obtained by such Holder in exchange for Initial Securities acquired by such Holder directly from the
Issuers. 

  
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 (b) Shelf Registration Statement. In connection with any Shelf Registration
Statement, the Issuer and each of the Guarantors shall comply with all the provisions of Section 6(c) hereof and shall use commercially reasonable efforts to effect such registration to permit the sale of the Transfer Restricted Securities
being sold in accordance with the intended method or methods of distribution thereof, and pursuant thereto the Issuer and each of the Guarantors will as expeditiously as possible prepare and file with the Commission a Registration Statement relating
to the registration on any appropriate form under the Securities Act, which form shall be available for the sale of the Transfer Restricted Securities in accordance with the intended method or methods of distribution thereof. 

(c) General Provisions. In connection with any Registration Statement and any Prospectus required by this Agreement to permit the
sale or resale of Transfer Restricted Securities (including, without limitation, any Registration Statement and the related Prospectus required to permit resales of Initial Securities by Broker-Dealers), the Issuer and each of the Guarantors shall:

 (i) use commercially reasonable efforts to keep such Registration Statement continuously effective and
provide all requisite financial statements (including, if required by the Securities Act or any regulation thereunder, financial statements of the Guarantors) for the period specified in Section 3 or 4 hereof, as applicable; upon the occurrence
of any event that would cause any such Registration Statement or the Prospectus contained therein (A) to contain a material misstatement or omission or (B) not to be effective and usable for resale of Transfer Restricted Securities during
the period required by this Agreement, the Issuer shall file promptly an appropriate amendment to such Registration Statement, in the case of clause (A), correcting any such misstatement or omission, and, in the case of either clause (A) or
(B), use commercially reasonable efforts to cause such amendment to be declared effective and such Registration Statement and the related Prospectus to become usable for their intended purposes as soon as practicable thereafter; 

(ii) prepare and file with the Commission such amendments and post-effective amendments to the applicable Registration
Statement as may be necessary to keep the Registration Statement effective for the applicable period set forth in Section 3 or 4 hereof, as applicable, or such shorter period as will terminate when all Transfer Restricted Securities covered by
such Registration Statement have been sold; cause the Prospectus to be supplemented by any required prospectus supplement, and as so supplemented to be filed pursuant to Rule 424 under the Securities Act, and to comply fully with the applicable
provisions of Rules 424, 430A and 430B under the Securities Act in a timely manner; and comply with the provisions of the Securities Act with respect to the disposition of all securities covered by such Registration Statement during the applicable
period in accordance with the intended method or methods of distribution by the sellers thereof set forth in such Registration Statement or supplement to the Prospectus; 

  
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 (iii) advise the underwriters, if any, and selling Holders promptly and, if
requested by such Persons, to confirm such advice in writing, (A) when the Prospectus or any prospectus supplement or post-effective amendment has been filed, and, with respect to any Registration Statement or any post-effective amendment
thereto, when the same has become effective, (B) of any request by the Commission for amendments to the Registration Statement or amendments or supplements to the Prospectus or for additional information relating thereto, (C) of the
issuance by the Commission of any stop order suspending the effectiveness of the Registration Statement under the Securities Act or of the suspension by any state securities commission of the qualification of the Transfer Restricted Securities for
offering or sale in any jurisdiction, or the initiation of any proceeding for any of the preceding purposes, (D) of the existence of any fact or the happening of any event that makes any statement of a material fact made in the Registration
Statement, the Prospectus, any amendment or supplement thereto, or any document incorporated by reference therein untrue, or that requires the making of any additions to or changes in the Registration Statement or the Prospectus in order to make the
statements therein (with respect to the Prospectus, in the light of the circumstances under which they were made) not misleading. If at any time the Commission shall issue any stop order suspending the effectiveness of the Registration Statement, or
any state securities commission or other regulatory authority shall issue an order suspending the qualification or exemption from qualification of the Transfer Restricted Securities under state securities or blue sky laws, each of the Issuer and the
Guarantors shall use commercially reasonable efforts to obtain the withdrawal or lifting of such order at the earliest possible time; 
 (iv) furnish without charge to each of the Initial Purchasers, each selling Holder named in any Registration Statement, and each underwriter, if any, before filing with the Commission, copies of any
Registration Statement or any Prospectus included therein or any amendments or supplements to any such Registration Statement or Prospectus, which documents will be subject to the review and comment of such Holders and underwriters in connection
with such sale, if any, for a period of at least five Business Days, and the Issuer will not file any such Registration Statement or Prospectus or any amendment or supplement to any such Registration Statement or Prospectus (including all such
documents incorporated by reference) to which an Initial Purchaser of Transfer Restricted Securities covered by such Registration Statement or the underwriters, if any, shall reasonably object in writing within five Business Days after the receipt
thereof (such objection to be deemed timely made upon confirmation of telecopy transmission within such period); provided, that this clause (iv) shall not apply to any filing by the Issuer of any Annual Report on Form 10-K, Quarterly Report on
Form 10-Q 

  
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or Current Report on Form 8-K with respect to matters unrelated to the Initial Securities, the Transfer Restricted Securities and the Exchange Securities and the offering or exchange therefor.
The objection of an Initial Purchaser or underwriter, if any, shall be deemed to be reasonable if such Registration Statement, amendment, Prospectus or supplement, as applicable, as proposed to be filed, contains a material misstatement or omission;

 (v) in the case of a Shelf Registration Statement, make available during normal business hours for inspection
by the Initial Purchasers, the managing underwriters, if any, participating in any disposition pursuant to such Registration Statement and any attorney or accountant retained by such Initial Purchasers or any of the underwriters, all financial and
other records, pertinent corporate documents and properties of the Issuer and each of the Guarantors and cause the Issuer’s and the Guarantors’ officers, directors and employees to supply all information reasonably requested by any such
Holder, underwriter, attorney or accountant in connection with such Registration Statement or any post-effective amendment thereto subsequent to the filing thereof and prior to its effectiveness and to participate in meetings with investors to the
extent requested by the managing underwriters, if any; 
 (vi) if requested by any selling Holders or the
underwriters, if any, promptly incorporate in any Registration Statement or Prospectus, pursuant to a supplement or post-effective amendment if necessary, such information as such selling Holders and underwriters, if any, may reasonably request to
have included therein, including, without limitation, information relating to the “Plan of Distribution” of the Transfer Restricted Securities, information with respect to the principal amount of Transfer Restricted Securities being sold
to such underwriters, the purchase price being paid therefor and any other terms of the offering of the Transfer Restricted Securities to be sold in such offering; and make all required filings of such Prospectus supplement or post-effective
amendment as soon as practicable after the Issuer is notified of the matters to be incorporated in such Prospectus supplement or post-effective amendment; 
 (vii) in the case of a Shelf Registration Statement, furnish to each Initial Purchaser, each selling Holder and each of the underwriters, if any, without charge, at least one copy of the Registration
Statement, as first filed with the Commission, and of each amendment thereto, including financial statements and schedules, all documents incorporated by reference therein and all exhibits (including exhibits incorporated therein by reference);

 (viii) deliver to each selling Holder and each of the underwriters, if any, without charge, as many copies of
the Prospectus (including each preliminary prospectus) and any amendment or supplement thereto as such Persons may reasonably request; the Issuer and each of the Guarantors hereby consents to the use of the Prospectus and any amendment or supplement
thereto by each of the selling Holders and each of the underwriters, if any, in connection with the offering and the sale of the Transfer Restricted Securities covered by the Prospectus or any amendment or supplement thereto; 

  
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 (ix) in the case of a Shelf Registration Statement, enter into such
agreements (including an underwriting agreement), and make such representations and warranties, and take all such other actions in connection therewith in order to expedite or facilitate the disposition of the Transfer Restricted Securities pursuant
to any Registration Statement contemplated by this Agreement, all to such extent as may be reasonably requested by any Initial Purchaser or by any Holder of Transfer Restricted Securities or underwriter in connection with any sale or resale pursuant
to any Registration Statement contemplated by this Agreement; and, whether or not an underwriting agreement is entered into and whether or not the registration is an Underwritten Registration, each of the Issuer and the Guarantors shall: 

(A) furnish to each Initial Purchaser, each selling Holder and each underwriter, if any, in such substance and scope as
they may reasonably request and as are customarily made by issuers to underwriters in primary underwritten offerings, upon the effectiveness of the Shelf Registration Statement: 

(1) a certificate, dated the date of effectiveness of the Shelf Registration Statement signed by (y) the Chief
Executive Officer, the President or any Vice President and (z) a principal financial or accounting officer of the Issuer and each of the Guarantors, confirming, as of the date thereof, the matters set forth in Section 6(d) of the Purchase
Agreement; 
 (2) an opinion, dated the date of effectiveness of the Shelf Registration Statement, as the case
may be, of counsel for the Issuer and the Guarantors, covering the matters set forth in Sections 6(a) and 6(b) of the Purchase Agreement and such other matter as such parties may reasonably request, and in any event including a statement to the
effect that such counsel has participated in conferences with officers and other representatives of the Issuer and the Guarantors, representatives of the independent public accountants for the Issuer and the Guarantors, representatives of the
underwriters, if any, and counsel to the underwriters, if any, in connection with the preparation of such Shelf Registration Statement and the related Prospectus and have considered the matters required to be stated therein and the statements
contained therein, although such counsel has not independently verified the accuracy, completeness or fairness of such statements; and that such counsel advises that, on the basis of such participation, no facts came to such counsel’s attention
that caused such counsel to believe that the Shelf Registration Statement, at the time such Shelf Registration Statement became effective, and contained an untrue statement of a material fact or omitted to state a material fact

  
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required to be stated therein or necessary to make the statements therein not misleading, or that the Prospectus contained in such Registration Statement as of its date contained an untrue
statement of a material fact or omitted to state a material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading. Without limiting the foregoing, such counsel may state
further that such counsel assumes no responsibility for, and has not independently verified, the accuracy, completeness or fairness of the financial statements, notes and schedules and other financial, accounting and reserve data included in any
Shelf Registration Statement contemplated by this Agreement or the related Prospectus; and 
 (3) a customary
comfort letter, dated the date of effectiveness of the Shelf Registration Statement, from the Issuer’s independent accountants (and, if necessary, any other independent certified public accountants of any subsidiary of the Issuer or of any
business acquired by the Issuer for which financial statements and financial data are, or are required to be, included or incorporated by reference in the Registration Statement), in the customary form and covering matters of the type customarily
requested to be covered in comfort letters by underwriters in connection with primary underwritten offerings, and covering or affirming the matters set forth in the comfort letters delivered pursuant to Section 6(e) of the Purchase Agreement,
without exception; 
 (B) set forth in full or incorporate by reference in the underwriting agreement, if any,
the indemnification provisions and procedures of Section 8 hereof with respect to all parties to be indemnified pursuant to said Section; and 
 (C) deliver such other documents and certificates as may be reasonably requested by such parties to evidence compliance with Section 6(c)(ix)(A) hereof and with any customary conditions contained in
the underwriting agreement or other agreement entered into by the Issuer or any of the Guarantors pursuant to this Section 6(c)(ix), if any. 
 If at any time the representations and warranties of the Issuer and the Guarantors contemplated in Section 6(c)(ix)(A)(1) hereof cease to be true and correct, the Issuer or the Guarantors shall so
advise the Initial Purchasers and the underwriters, if any, and each selling Holder promptly and, if requested by such Persons, shall confirm such advice in writing; 

(x) prior to any public offering of Transfer Restricted Securities pursuant to a Shelf Registration Statement, cooperate
with the selling Holders, the underwriters, if any, and their respective counsel in connection with the registration and qualification of the 

  
 -13-

 
Transfer Restricted Securities under the state securities or blue sky laws of such jurisdictions as the selling Holders or underwriters, if any, may request and do any and all other acts or
things necessary or advisable to enable the disposition in such jurisdictions of the Transfer Restricted Securities covered by the Shelf Registration Statement; provided, however, that neither the Issuer nor any of the Guarantors shall be
required to register or qualify as a foreign entity where it is not then so qualified or to take any action that would subject it to the service of process in suits or to taxation in any jurisdiction where it is not then so subject; 

(xi) shall issue, in connection with the Consummation of the Exchange Offer and in accordance with the Indenture,
Exchange Securities having an aggregate principal amount equal to the aggregate principal amount of Initial Securities surrendered to the Issuer by the Holders in exchange therefore; 

(xii) cooperate with the selling Holders and the underwriters, if any, to facilitate the timely preparation and delivery
of certificates representing Transfer Restricted Securities to be sold and not bearing any restrictive legends; and enable such Transfer Restricted Securities to be in such denominations and registered in such names as the Holders or the
underwriters, if any, may request at least two Business Days prior to any sale of Transfer Restricted Securities made by such Holders or underwriters; 
 (xiii) use commercially reasonable efforts to cause the Transfer Restricted Securities covered by the Registration Statement to be registered with or approved by such other domestic governmental agencies
or authorities as may be necessary to enable the seller or sellers thereof or the underwriters, if any, to consummate the disposition of such Transfer Restricted Securities, subject to the proviso contained in Section 6(c)(x) hereof;

 (xiv) if any fact or event contemplated by Section 6(c)(iii)(D) hereof shall exist or have occurred,
prepare a supplement or post-effective amendment to the Registration Statement or related Prospectus or any document incorporated therein by reference or file any other required document so that, as thereafter delivered to the purchasers of Transfer
Restricted Securities, the Prospectus will not contain an untrue statement of a material fact or omit to state any material fact necessary in order to make the statements therein, in light of the circumstances under which they were made, not
misleading; 
 (xv) provide a CUSIP number for all Exchange Securities not later than the effective date of the
Registration Statement covering such Exchange Securities and provide the Trustee under the Indenture with printed certificates for such Exchange Securities which are in a form eligible for deposit with the Depository Trust Company and take all other
action necessary to ensure that all such Exchange Securities are eligible for deposit with the Depository Trust Company; 

  
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 (xvi) cooperate and assist in any filings required to be made with the FINRA
and in the performance of any due diligence investigation by any underwriter (including any “qualified independent underwriter” as that term is defined within the rules and regulations of the FINRA) that is required to be retained in
accordance with the rules and regulations of the FINRA; 
 (xvii) otherwise use commercially reasonable efforts
to comply with all applicable rules and regulations of the Commission, and make generally available to its security holders, as soon as practicable, a consolidated earnings statement meeting the requirements of Rule 158 under the Securities Act
(which need not be audited) for the twelve-month period (A) commencing at the end of any fiscal quarter in which Transfer Restricted Securities are sold to underwriters in a firm commitment or best efforts Underwritten Offering or (B) if
not sold to underwriters in such an offering, beginning with the first month of the Issuer’s first fiscal quarter commencing after the effective date of the Registration Statement; 

(xviii) cause the Indenture to be qualified under the Trust Indenture Act not later than the effective date of the first
Registration Statement required by this Agreement, and, in connection therewith, cooperate with the Trustee and the Holders of the Initial Securities to effect such changes to the Indenture as may be required for such Indenture to be so qualified in
accordance with the terms of the Trust Indenture Act; and to execute, and use commercially reasonable efforts to cause the Trustee to execute, all documents that may be required to effect such changes and all other forms and documents required to be
filed with the Commission to enable such Indenture to be so qualified in a timely manner; and 
 (xix) in the
case of a Shelf Registration Statement, cause all Transfer Restricted Securities covered by such Shelf Registration Statement to be listed on each securities exchange or automated quotation system on which similar securities issued by the Issuer are
then listed if requested by the Holders of a majority in aggregate principal amount of Initial Securities or the managing underwriters, if any. 
 Each Holder agrees by acquisition of a Transfer Restricted Security that, upon receipt of any notice from the Issuer of the existence of any fact of the kind described in Section 6(c)(iii)(D) hereof
or any Blackout Period described in Section 4(a) hereof, such Holder will forthwith discontinue disposition of Transfer Restricted Securities pursuant to the applicable Registration Statement until such Holder’s receipt of the copies of
the supplemented or amended Prospectus contemplated by Section 6(c)(xiv) hereof, or until it is advised in writing (the “Advice”) by the Issuer that the use of the Prospectus may be resumed, and has received copies of
any additional or supplemental filings that are incorporated by reference in the Prospectus. If so directed by the Issuers, each Holder will deliver to the Issuer (at the Issuer’s expense) all copies, other than permanent file copies then in
such Holder’s possession, of the Prospectus covering such Transfer Restricted Securities that was current at the time of receipt of such notice. 

  
 -15-

 
In the event the Issuer shall give any such notice, the time period regarding the effectiveness of such Registration Statement set forth in Section 3 or 4 hereof, as applicable, shall be
extended by the number of days during the period from and including the date of the giving of such notice pursuant to Section 6(c)(iii)(D) hereof or notice of any Blackout Period to and including the date when each selling Holder covered by
such Registration Statement shall have received the copies of the supplemented or amended Prospectus contemplated by Section 6(c)(xiv) hereof or shall have received the Advice. 

SECTION 7. Registration Expenses. 
 (a) All expenses incident to the Issuer’s and the Guarantors’ performance of or compliance with this Agreement will be borne by the Issuer and the Guarantors, jointly and severally, regardless
of whether a Registration Statement becomes effective, including, without limitation: (i) all registration and filing fees and expenses (including filings made by any Initial Purchaser or Holder with the FINRA (and, if applicable, the fees and
expenses of any “qualified independent underwriter” and its counsel that may be required by the rules and regulations of the FINRA)); (ii) all fees and expenses of compliance with federal securities and state securities or blue sky
laws; (iii) all expenses of printing (including printing of Prospectuses), if any, messenger and delivery services and telephone; (iv) all fees and disbursements of counsel for the Issuers, the Guarantors and, subject to Section 7(b)
hereof, the Holders of Transfer Restricted Securities; and (v) all fees and disbursements of independent certified public accountants of the Issuer and the Guarantors (including the expenses of any special audit and comfort letters required by
or incident to such performance). 
 Each of the Issuer and the Guarantors will, in any event, bear its internal expenses
(including, without limitation, all salaries and expenses of its officers and employees performing legal or accounting duties), the expenses of any annual audit and the fees and expenses of any Person, including special experts, retained by the
Issuer or the Guarantors. 
 (b) In connection with any Shelf Registration Statement required by this Agreement, the Issuer and
the Guarantors, jointly and severally, will reimburse the Initial Purchasers and the Holders of Transfer Restricted Securities being registered pursuant to the Shelf Registration Statement, as applicable, for the reasonable fees and disbursements of
not more than one counsel, who shall be Baker Botts L.L.P. or such other counsel as may be chosen by the Holders of a majority in principal amount of the Transfer Restricted Securities for whose benefit such Registration Statement is being prepared.

 SECTION 8. Indemnification. 
 (a) The Issuer and the Guarantors, jointly and severally, agree to indemnify and hold harmless (i) each Holder and (ii) each Person, if any, who controls (within the meaning of Section 15
of the Securities Act or Section 20 of the Exchange Act) any Holder (any of the Persons referred to in this clause (ii) being hereinafter referred to as a “controlling person”) and

  
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(iii) the respective officers, directors, partners, employees, representatives and agents of any Holder or any controlling person (any Person referred to in clause (i), (ii) or
(iii) may hereinafter be referred to as an “Indemnified Holder”), to the fullest extent lawful, from and against any and all losses, claims, damages or liabilities (or actions in respect thereof) including, without
limitation, and as incurred, reimbursement of each such Indemnified Holder for any legal or other expenses reasonably incurred by them in connection with investigating or defending any such loss, claim, damage, liability or action, joint or several,
directly or indirectly arising out of or based upon any untrue statement or alleged untrue statement of a material fact contained in any Registration Statement or Prospectus (or any amendment or supplement thereto), or any omission or alleged
omission to state therein a material fact required to be stated therein or necessary to make the statements therein (with respect to the Prospectus, in the light of the circumstances under which they were made) not misleading, except insofar as such
losses, claims, damages, liabilities or actions are caused by an untrue statement or omission or alleged untrue statement or omission that is made in reliance upon and in conformity with information relating to any of the Holders furnished in
writing to the Issuer or any of the Guarantors by any of the Holders expressly for use therein. This indemnity agreement shall be in addition to any liability which the Issuer or any of the Guarantors may otherwise have. 

In case any action or proceeding (including any governmental or regulatory investigation or proceeding) shall be brought or asserted
against any of the Indemnified Holders with respect to which indemnity may be sought against the Issuer or the Guarantors, such Indemnified Holder (or the Indemnified Holder controlled by such controlling person) shall promptly notify the Issuer and
the Guarantors in writing; provided, however, that the failure to give such notice shall not relieve the Issuer or any of the Guarantors of their respective obligations pursuant to this Agreement. Such Indemnified Holder shall have the right
to employ its own counsel in any such action and the fees and expenses of such counsel shall be paid, as incurred, by the Issuer and the Guarantors (regardless of whether it is ultimately determined that an Indemnified Holder is not entitled to
indemnification hereunder). The Issuer and the Guarantors 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 liable for the reasonable fees and expenses of more than one separate firm of attorneys (in addition to any local counsel) at any time for such Indemnified Holders, which firm shall be designated by the
Holders. The Issuer and the Guarantors shall be liable for any settlement of any such action or proceeding effected with the Issuer’s and the Guarantors’ prior written consent, and the Issuer and each of the Guarantors agrees to indemnify
and hold harmless any Indemnified Holder from and against any loss, claim, damage, liability or expense by reason of any settlement of any action effected with the written consent of the Issuer and the Guarantors. The Issuer and the Guarantors shall
not, without the prior written consent of each Indemnified Holder, settle or compromise or consent to the entry of judgment in or otherwise seek to terminate any pending or threatened action, claim, litigation or proceeding in respect of which
indemnification or contribution may be sought hereunder (whether or not any Indemnified Holder is a party thereto), unless such settlement, compromise, consent or termination includes an unconditional release of each Indemnified Holder from all
liability arising out of such action, claim, litigation or proceeding. 

  
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 (b) Each Holder agrees, severally and not jointly, to indemnify and hold harmless the
Issuer, each of the Guarantors and the respective directors and officers of the Issuer and the Guarantors who sign a Registration Statement, and any Person controlling (within the meaning of Section 15 of the Securities Act or Section 20
of the Exchange Act) the Issuer or any of the Guarantors, and the respective officers, directors, partners, employees, representatives and agents of each such Person, to the same extent as the foregoing indemnity from the Issuer and each of the
Guarantors to each of the Indemnified Holders, but only with respect to claims and actions based on information relating to such Holder furnished in writing by such Holder expressly for use in any Registration Statement or Prospectus. In case any
action or proceeding shall be brought against the Issuer, the Guarantors or their respective directors or officers or any such controlling person in respect of which indemnity may be sought against a Holder of Transfer Restricted Securities, such
Holder shall have the rights and duties given the Issuer and the Guarantors, and the Issuers, the Guarantors, their respective directors and officers and such controlling person shall have the rights and duties given to each Holder by the preceding
paragraph. 
 (c) If the indemnification provided for in this Section 8 is unavailable to an indemnified party under
Section 8(a) or (b) hereof (other than by reason of exceptions provided in those Sections) in respect of any losses, claims, damages, liabilities or actions referred to therein, then each applicable indemnifying party, in lieu of
indemnifying such indemnified party, shall contribute to the amount paid or payable by such indemnified party as a result of such losses, claims, damages or liabilities in such proportion as is appropriate to reflect the relative benefits received
by the Issuer and the Guarantors, on the one hand, and the Holders, on the other hand, from the Initial Placement (which in the case of the Issuer and the Guarantors shall be deemed to be equal to the total gross proceeds to the Issuer and the
Guarantors from the Initial Placement), the amount of Additional Interest which did not become payable as a result of the filing of the Registration Statement resulting in such losses, claims, damages, liabilities or actions, and such Registration
Statement, or if such allocation is not permitted by applicable law, the relative fault of the Issuer and the Guarantors, on the one hand, and the Holders, on the other hand, in connection with the statements or omissions which resulted in such
losses, claims, damages or liabilities, as well as any other relevant equitable considerations. The relative fault of the Issuer and the Guarantors on the one hand and of the Indemnified Holder on the other shall be determined by reference to, among
other things, whether the untrue or alleged untrue statement of a material fact or the omission or alleged omission to state a material fact relates to information supplied by the Issuer or any of the Guarantors, on the one hand, or the Indemnified
Holders, on the other hand, and the parties’ relative intent, knowledge, access to information and opportunity to correct or prevent such statement or omission. The amount paid or payable by a party as a result of the losses, claims, damages,
liabilities and actions referred to above shall be deemed to include, subject to the limitations set forth in the second paragraph of Section 8(a) hereof, any legal or other fees or expenses reasonably incurred by such party in connection with
investigating or defending any action or claim. 

  
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 The Issuer, the Guarantors and each Holder agree that it would not be just and equitable if
contribution pursuant to this Section 8(c) were determined by pro rata allocation (even if the Holders were treated as one entity for such purpose) or by any other method of allocation which does not take account of the equitable considerations
referred to in the immediately preceding paragraph. The amount paid or payable by an indemnified party as a result of the losses, claims, damages, liabilities or actions referred to in the immediately preceding paragraph shall be deemed to include,
subject to the limitations set forth above, any legal or other expenses reasonably incurred by such indemnified party in connection with investigating or defending any such action or claim. Notwithstanding the provisions of this Section 8, none
of the Holders (and its related Indemnified Holders) shall be required to contribute, in the aggregate, any amount in excess of the amount by which the total discount received by such Holder with respect to the Initial Securities exceeds the amount
of any damages which such Holder has otherwise been required to pay by reason of such untrue or alleged untrue statement or omission or alleged omission. 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. The Holders’ obligations to contribute pursuant to this Section 8(c) are several in proportion to the respective
principal amount of Initial Securities held by each of the Holders hereunder and not joint. 
 SECTION 9. Rule 144A. Each
of the Issuer and the Guarantors hereby agrees with each Holder, for so long as any Transfer Restricted Securities remain outstanding, to make available to any Holder or beneficial owner of Transfer Restricted Securities in connection with any sale
thereof and any prospective purchaser of such Transfer Restricted Securities from such Holder or beneficial owner, the information required by Rule 144A(d)(4) under the Securities Act in order to permit resales of such Transfer Restricted Securities
pursuant to Rule 144A under the Securities Act. 
 SECTION 10. Participation in Underwritten Registrations. No Holder may
participate in any Underwritten Registration hereunder unless such Holder (a) agrees to sell such Holder’s Transfer Restricted Securities on the basis provided in any underwriting arrangements approved by the Persons entitled hereunder to
approve such arrangements and (b) completes and executes all reasonable questionnaires, powers of attorney, indemnities, underwriting agreements, lock-up letters and other documents required under the terms of such underwriting arrangements.

 SECTION 11. Selection of Underwriters. The Holders of Transfer Restricted Securities covered by the Shelf Registration
Statement who desire to do so may sell such Transfer Restricted Securities in an Underwritten Offering. In any such Underwritten Offering, the investment bankers and managing underwriter(s) that will administer such offering will be selected by the
Holders of a majority in aggregate principal amount of the Transfer Restricted Securities included in such offering; provided, however, that such investment banker(s) and managing underwriters must be reasonably satisfactory to the Issuer.

  
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 SECTION 12. Miscellaneous. 

(a) Remedies. The Issuer and each of the Guarantors hereby agrees that monetary damages would not be adequate compensation for any
loss incurred by reason of a breach by it of the provisions of this Agreement and hereby agree to waive the defense in any action for specific performance that a remedy at law would be adequate. 

(b) No Inconsistent Agreements. The Issuer and each of the Guarantors will not on or after the date of this Agreement enter into
any agreement with respect to its securities that is inconsistent with the rights granted to the Holders in this Agreement or otherwise conflicts with the provisions hereof. The rights granted to the Holders hereunder do not in any way conflict with
and are not inconsistent with the rights granted to the holders of the Issuer’s or any of the Guarantors’ securities under any agreement in effect on the date hereof. 

(c) Adjustments Affecting the Securities. The Issuer will not take any action, or permit any change to occur, with respect to the
Initial Securities that would materially and adversely affect the ability of the Holders to Consummate any Exchange Offer. 

(d) Amendments and Waivers. The provisions of this Agreement may not be amended, modified or supplemented, and waivers or consents
to or departures from the provisions hereof may not be given unless the Issuer has (i) in the case of Section 5 hereof and this Section 12(d)(i), obtained the written consent of Holders of all outstanding Transfer Restricted
Securities and (ii) in the case of all other provisions hereof, obtained the written consent of Holders of a majority of the outstanding principal amount of Transfer Restricted Securities (excluding any Transfer Restricted Securities held by
the Issuer or its Affiliates). Notwithstanding the foregoing, a waiver or consent to departure from the provisions hereof that relates exclusively to the rights of Holders whose securities are being tendered pursuant to the Exchange Offer and that
does not affect directly or indirectly the rights of other Holders whose securities are not being tendered pursuant to such Exchange Offer may be given by the Holders of a majority of the outstanding principal amount of Transfer Restricted
Securities being tendered or registered; provided, however, that, with respect to any matter that directly or indirectly affects the rights of any Initial Purchaser hereunder, the Issuer shall obtain the written consent of each such Initial
Purchaser with respect to which such amendment, qualification, supplement, waiver, consent or departure is to be effective. 

(e) Notices. All notices and other communications provided for or permitted hereunder shall be made in writing by hand-delivery,
first-class mail (registered or certified, return receipt requested), telex, telecopier, or air courier guaranteeing overnight delivery: 

  
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 (i) if to a Holder, at the address set forth on the records of the Trustee
under the Indenture, with a copy to the Trustee under the Indenture; and 
 (ii) if to the Issuer: 

Endeavour International Corporation 

811 Main Street, Suite 2100 
 Houston, TX 77002 
 Facsimile: (813) 307-8794 

Attention: J. Michael Kirksey 
 with a copy (which shall not constitute notice) to: 

Vinson & Elkins L.L.P. 
 1001 Fannin Street 
 Houston, TX 77002 

Facsimile: (713) 615-5531 
 Attention: T. Mark Kelly 
 All such notices and communications shall be deemed to
have been duly given: at the time delivered by hand, if personally delivered; five Business Days after being deposited in the mail, postage prepaid, if mailed; when answered back, if telexed; when receipt acknowledged, if telecopied; and on the next
Business Day, if timely delivered to an air courier guaranteeing overnight delivery. 
 Copies of all such notices, demands or
other communications shall be concurrently delivered by the Person giving the same to the Trustee at the address specified in the Indenture. 
 (f) Successors and Assigns. This Agreement shall inure to the benefit of and be binding upon the successors and assigns of each of the parties, including, without limitation, and without the need
for an express assignment, subsequent Holders of Transfer Restricted Securities; provided, however, that this Agreement shall not inure to the benefit of or be binding upon a successor or assign of a Holder unless and to the extent such
successor or assign acquired Transfer Restricted Securities from such Holder. 
 (g) Counterparts. This Agreement may be
executed in any number of counterparts and by the parties hereto in separate counterparts, each of which when so executed shall be deemed to be an original and all of which taken together shall constitute one and the same agreement. 

(h) Headings. The headings in this Agreement are for convenience of reference only and shall not limit or otherwise affect the
meaning hereof. 

  
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 (i) Governing Law. THIS AGREEMENT SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE
WITH THE LAWS OF THE STATE OF NEW YORK, WITHOUT REGARD TO THE CONFLICTS OF LAW RULES THEREOF. 
 (j) Severability. In the
event that any one or more of the provisions contained herein, or the application thereof in any circumstance, is held invalid, illegal or unenforceable, the validity, legality and enforceability of any such provision in every other respect and of
the remaining provisions contained herein shall not be affected or impaired thereby. 
 (k) 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. There are
no restrictions, promises, warranties or undertakings, other than those set forth or referred to herein with respect to the registration rights granted by the Issuer with respect to the Transfer Restricted Securities. This Agreement supersedes all
prior agreements and understandings between the parties with respect to such subject matter. 
 [signature page follows]

  
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 IN WITNESS WHEREOF, the parties have executed this Agreement as of the date first written
above. 
  

			
	COMPANY
	
	ENDEAVOUR INTERNATIONAL CORPORATION
		
	By:	 	/s/ J. Michael Kirksey
		 	 J. Michael Kirksey

Executive Vice President and Chief Financial Officer

  

			
	GUARANTORS
	
	 ENDEAVOUR OPERATING CORPORATION

ENDEAVOUR ENERGY NEW VENTURES INC.

END MANAGEMENT COMPANY

		
	By:	 	/s/ J. Michael Kirksey
		 	 J. Michael Kirksey

Executive Vice President and Chief Financial Officer

 The foregoing Registration Rights Agreement is hereby confirmed and accepted as of the date first above
written: 
  

			
	 CITIGROUP GLOBAL MARKETS INC.
 acting on behalf of itself and as the Representative
 of the several Initial
Purchasers

		
	By:  	 	/s/ Christopher Abatte
		 	Name:  Christopher Abatte
		 	Title:    Managing Director

 SCHEDULE A 

Guarantors 
 Endeavour
Operating Company 
 Endeavour Energy New Ventures Inc. 
 Endeavour Management CompanySecondary Priority Registration Rights Agreement

 Exhibit 4.6 
 Execution Version 
 REGISTRATION RIGHTS AGREEMENT 

by and among 
 Endeavour International Corporation 
 the Guarantors party hereto,

 and 
 Citigroup Global Markets Inc. 
 Dated as of February 23, 2012

 REGISTRATION RIGHTS AGREEMENT 

This Registration Rights Agreement (this “Agreement”) is made and entered into as of February 23, 2012, by
and among Endeavour International Corporation, a Nevada corporation (the “Company” or the “Issuer”), the entities listed on Schedule A hereto (collectively, the “Guarantors”),
and Citigroup Global Markets Inc. (the “Initial Purchaser”), which has agreed to purchase the Issuer’s 12% Second Priority Notes due 2018 (the “Initial Notes”), fully and
unconditionally guaranteed by the Guarantors (the “Guarantees”) pursuant to the Purchase Agreement (as defined below). The Initial Notes and the Guarantees are herein collectively referred to as the “Initial
Securities.” 
 This Agreement is made pursuant to the Purchase Agreement, dated February 13, 2012 (the
“Purchase Agreement”), by and among the Issuers, the Guarantors, the Initial Purchaser and the initial purchasers of the Issuer’s 12% First Priority Notes due 2018, (i) for the benefit of the Initial Purchaser and
(ii) for the benefit of the holders from time to time of Initial Securities, including the Initial Purchaser. In order to induce the Initial Purchaser to purchase the Initial Securities, the Issuer has agreed to provide the registration rights
set forth in this Agreement. The execution and delivery of this Agreement is a condition to the obligations of the Initial Purchaser set forth in Section 6(l) of the Purchase Agreement. 

The parties hereby agree as follows: 
 SECTION 1. Definitions. As used in this Agreement, the following capitalized terms shall have the following meanings: 
 Additional Interest: As defined in Section 5 hereof. 

Advice: As defined in Section 6(c) hereof. 

Affiliate: As defined in Rule 144 promulgated by the Commission. 

Agreement: As defined in the preamble hereto. 
 Blackout Period: As defined in the last paragraph of Section 4(a) hereof. 
 Broker-Dealer: Any broker or dealer registered under the Exchange Act. 
 Business Day: Any day other than a Saturday, Sunday or U.S. federal holiday or a day on which banking institutions or trust companies located in New York, New York are authorized or
obligated to be closed. 
 Closing Date: The date of this Agreement. 

Commission: The Securities and Exchange Commission. 

Consummate: A registered Exchange Offer shall be deemed “Consummated” for purposes of this Agreement upon
the occurrence of (i) the filing and effectiveness under the 

 
Securities Act of the Exchange Offer Registration Statement relating to the Exchange Securities to be issued in the Exchange Offer, (ii) the maintenance of such Registration Statement
continuously effective and the keeping of the Exchange Offer open for a period not less than the minimum period required pursuant to Section 3(b) hereof, and (iii) the delivery by the Issuer to the Registrar under the Indenture of Exchange
Securities in the same aggregate principal amount as the aggregate principal amount of Initial Securities that were tendered by Holders thereof pursuant to the Exchange Offer. 
 controlling person: As defined in Section 8(a) hereof. 

Exchange Act: The Securities Exchange Act of 1934, as amended. 

Exchange Date: The date that Exchange Securities are delivered by the Issuer to the Registrar under the Indenture of
Exchange Securities in the same aggregate principal amount as the aggregate principal amount of Initial Securities that were tendered by Holders thereof pursuant to the Exchange Offer. 

Exchange Deadline: As defined in Section 3(b) hereof. 

Exchange Offer: An offer registered under the Securities Act by the Issuer and the Guarantors pursuant to a
Registration Statement pursuant to which the Issuer offers the Holders of all outstanding Transfer Restricted Securities the opportunity to exchange all such outstanding Transfer Restricted Securities held by such Holders for Exchange Securities in
an aggregate principal amount equal to the aggregate principal amount of the Transfer Restricted Securities tendered in such exchange offer by such Holders with terms that are identical in all respects to the Transfer Restricted Securities (except
that Exchange Securities will not contain terms with respect to any increase in annual interest rate as described herein and the transfer restrictions). 
 Exchange Offer Registration Statement: The Registration Statement relating to the Exchange Offer, including the related Prospectus, as defined in Section 3(a) hereof. 

Exchange Securities: The 12% Second Priority Notes due 2018, of the same series under the Indenture as the Initial
Securities, including the Guarantees, to be offered to Holders in exchange for Transfer Restricted Securities pursuant to this Agreement. 
 FINRA: The Financial Industry Regulatory Authority, Inc., an independent regulatory organization (formerly National Association of Securities Dealers or NASD). 

Guarantees: As defined in the preamble hereto. 
 Holder: As defined in Section 2(b) hereof. 

Indemnified Holder: As defined in Section 8(a) hereof. 

  
 -2-

 Indenture: The Indenture, dated as of February 23, 2012, by and
among the Issuers, the Guarantors and Wilmington Trust, National Association, as trustee (the “Trustee”), pursuant to which the Initial Securities and the Exchange Securities are to be issued, as such Indenture is amended or
supplemented from time to time in accordance with the terms thereof. 
 Initial Notes: As defined in the
preamble hereto. 
 Initial Placement: The issuance and sale by the Issuer of the Initial Securities to the
Initial Purchaser pursuant to the Purchase Agreement. 
 Initial Purchaser: As defined in the preamble
hereto. 
 Initial Securities: As defined in the preamble hereto. 

Issuer: As defined in the preamble hereto 
 Person: An individual, partnership, corporation, limited liability company, trust, unincorporated organization or other legal entity, or a government or agency or political
subdivision thereof. 
 Prospectus: The prospectus included in a Registration Statement, as amended or
supplemented by any prospectus supplement and by all other amendments thereto, including post-effective amendments, and all material incorporated by reference into such Prospectus. 

Registration Default: As defined in Section 5 hereof. 

Registration Statement: Any Exchange Offer Registration Statement or Shelf Registration Statement, which is filed
pursuant to the provisions of this Agreement, in each case, including the Prospectus included therein, all amendments and supplements thereto (including post-effective amendments) and all exhibits and material incorporated by reference therein.

 Securities Act: The Securities Act of 1933, as amended. 

Shelf Filing Deadline: As defined in Section 4(a) hereof. 

Shelf Registration Statement: As defined in Section 4(a)(x) hereof. 

Transfer Restricted Securities: Each Initial Security, until the earliest to occur of (a) the date on
which such Initial Security is exchanged in the Exchange Offer for an Exchange Security and entitled to be resold to the public by the Holder thereof without complying with the prospectus delivery requirements of the Securities Act; (b) the
date on which the resale of such Initial Security has been effectively registered under the Securities Act and disposed of in accordance with a Shelf Registration Statement; (c) if a Shelf Registration Statement is required to be filed in
accordance with Section 4 hereof, one year from the effective date of such Shelf 

  
 -3-

 
Registration Statement; (d) the date on which such Initial Security is sold pursuant to Rule 144 under circumstances in which any legend borne by such Initial Security relating to
restrictions on transferability thereof, under the Securities Act or otherwise, is removed, or the restrictive CUSIP number is redesignated as non-restrictive, by the Issuer or pursuant to the Indenture; (e) the date upon which such Initial
Security is distributed to the public by a Broker-Dealer pursuant to the “Plan of Distribution” contemplated by the Exchange Offer Registration Statement (including delivery of the Prospectus contained therein); and (f) the date on
which such Initial Security ceases to be outstanding. 
 Trust Indenture Act: The Trust Indenture Act of
1939, as amended. 
 Underwritten Registration or Underwritten Offering: A registration in which securities
of the Issuer are sold to an underwriter for reoffering to the public. 
 SECTION 2. Securities Subject to this
Agreement. 
 (a) Transfer Restricted Securities. The securities entitled to the benefits of this Agreement are the
Transfer Restricted Securities. 
 (b) Holders of Transfer Restricted Securities. A Person is deemed to be a holder of
Transfer Restricted Securities (a “Holder”) whenever such Person owns Transfer Restricted Securities. 

SECTION 3. Registered Exchange Offer. 
 (a) Unless the Exchange Offer shall not be permissible under applicable law or Commission policy (after the procedures set forth in Section 6(a) hereof have been complied with), the Issuer and the
Guarantors shall (i) cause to be filed with the Commission sufficiently promptly so as to avoid a Registration Default with respect to the Exchange Offer, a Registration Statement under the Securities Act relating to the Exchange Securities and
the Exchange Offer (the “Exchange Offer Registration Statement”), (ii) use their commercially reasonable efforts to cause such Exchange Offer Registration Statement to become effective under the Securities Act
sufficiently promptly so as to avoid a Registration Default with respect to the Exchange Offer, (iii) in connection with the foregoing, file (A) all pre-effective amendments to such Exchange Offer Registration Statement as may be necessary
in order to cause such Exchange Offer Registration Statement to become effective, (B) if applicable, a post-effective amendment to such Exchange Offer Registration Statement pursuant to Rule 430A under the Securities Act and (C) cause all
necessary filings in connection with the registration and qualification of the Exchange Securities to be made under the state securities or blue sky laws of such jurisdictions as are necessary to permit Consummation of the Exchange Offer, and
(iv) upon the effectiveness of such Exchange Offer Registration Statement, commence the Exchange Offer. The Exchange Offer shall be on the appropriate form permitting registration of the Exchange Securities to be offered in exchange for the
Transfer Restricted Securities and to permit resales of Transfer Restricted Securities held by Broker-Dealers as contemplated by Section 3(c) hereof. 

  
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 (b) The Issuer and the Guarantors shall cause the Exchange Offer Registration Statement to
be effective continuously and shall keep the Exchange Offer open for a period of not less than the minimum period required under applicable federal and state securities laws to Consummate the Exchange Offer; provided, however, that in no
event shall such period be less than 20 Business Days after the date notice of the Exchange Offer is mailed to the Holders. The Issuer shall cause the Exchange Offer to comply with all applicable federal and state securities laws. No securities
other than the Exchange Securities shall be included in the Exchange Offer Registration Statement. The Issuer and the Guarantors shall use commercially reasonable efforts to cause the Exchange Offer to be Consummated on the earliest practicable date
after the Exchange Offer Registration Statement has become effective, but in no event later than 360 days after the Closing Date (or if such 360th day is not a Business Day, the next succeeding Business Day) (such 360th day herein referred to as the
“Exchange Deadline”). 
 (c) The Issuer shall indicate in a “Plan of Distribution” section
contained in the Prospectus forming a part of the Exchange Offer Registration Statement that any Broker-Dealer who holds Initial Securities that are Transfer Restricted Securities that were acquired for its own account as a result of market-making
activities or other trading activities (other than Transfer Restricted Securities acquired directly from the Issuers), may exchange such Initial Securities pursuant to the Exchange Offer; however, such Broker-Dealer may be deemed to be an
“underwriter” within the meaning of the Securities Act and must, therefore, deliver a prospectus meeting the requirements of the Securities Act in connection with any resales of the Exchange Securities received by such Broker-Dealer in the
Exchange Offer, which prospectus delivery requirement may be satisfied by the delivery by such Broker-Dealer of the Prospectus contained in the Exchange Offer Registration Statement. Such “Plan of Distribution” section shall also contain
all other information with respect to such resales by Broker-Dealers that the Commission may require in order to permit such resales pursuant thereto, but such “Plan of Distribution” shall not name any such Broker-Dealer or disclose the
amount of Initial Securities held by any such Broker-Dealer except to the extent required by the Commission. 
 The Issuer and
the Guarantors shall use commercially reasonable efforts to keep the Exchange Offer Registration Statement continuously effective, supplemented and amended as required by the provisions of Section 6(c) hereof to the extent necessary to ensure
that it is available for resales of Transfer Restricted Securities acquired by Broker-Dealers for their own accounts as a result of market-making activities or other trading activities, and to ensure that it conforms with the requirements of this
Agreement, the Securities Act and the policies, rules and regulations of the Commission as announced from time to time, for a period ending on the earlier of (i) 180 days from the date on which the Exchange Offer Registration Statement is
declared effective and (ii) the date on which a Broker-Dealer is no longer required to deliver a prospectus in connection with market-making or other trading activities. 

  
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 The Issuer shall provide sufficient copies of the latest version of such Prospectus to
Broker-Dealers promptly upon request at any time during such 180-day (or shorter as provided in the foregoing sentence) period in order to facilitate such resales. 
 SECTION 4. Shelf Registration. 
 (a) Shelf Registration. If
(i) the Issuer and the Guarantors are not required to file an Exchange Offer Registration Statement or to consummate the Exchange Offer for the Initial Securities because the Exchange Offer is not permitted by applicable law or Commission
policy; (ii) for any reason the Exchange Offer for the Initial Securities is not Consummated by the Exchange Deadline; or (iii) with respect to any Holder of Transfer Restricted Securities that is not an Affiliate of the Issuer or
Guarantors (A) such Holder is prohibited by applicable law or Commission policy from participating in the Exchange Offer, (B) such Holder may not resell the Exchange Securities acquired by it in the Exchange Offer to the public without
delivering a prospectus and that the Prospectus contained in the Exchange Offer Registration Statement is not appropriate or available for such resales by such Holder, or (C) such Holder is a Broker-Dealer and holds Initial Securities acquired
directly from the Issuer or one of its Affiliates, then, upon such Holder’s request, the Issuer and the Guarantors shall (1) if permitted by law, cause the Transfer Restricted Securities of such Holder to be reissued in a form that does
not bear any restrictive legends relating to the Securities Act or a restrictive CUSIP number so that such Securities may be sold to the public in accordance with Rule 144 under the Securities Act by a person that is not an Affiliate of the Issuer
or any of the Guarantors where no conditions of Rule 144 are then applicable (other than the holding period requirement in paragraph (d)(1)(ii) of Rule 144 so long as such holding period requirement is satisfied at such time of such reissue) and
(2) in the event the Issuer cannot or does not comply with the provisions of the foregoing clause within 20 Business Days of the later of (I) the date of receipt by the Issuer of such notice of such Holder and (II) the first to occur of
the Exchange Date and the Exchange Deadline (such later date being a “Shelf Filing Deadline”), then the Issuer and the Guarantors shall 
 (x) cause to be filed a shelf registration statement pursuant to Rule 415 under the Securities Act, which may be an amendment to the Exchange Offer Registration Statement (in either event, the
“Shelf Registration Statement”) on or prior to the Shelf Filing Deadline which Shelf Registration Statement shall provide for resales of all Transfer Restricted Securities the Holders of which shall have provided the
information required pursuant to Section 4(b) hereof; and 
 (y) use their commercially reasonable efforts to cause such
Shelf Registration Statement to be declared effective by the Commission on or before the 180th day after the Shelf Filing Deadline (or if such 180th day is not a Business Day, the next succeeding Business Day). 

  
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 The Issuer and each of the Guarantors shall keep any such Shelf Registration Statement
continuously effective, supplemented and amended as required by the provisions of Sections 6(b) and (c) hereof to the extent necessary to ensure that it is available for resales of Transfer Restricted Securities by the Holders entitled to the
benefit of this Section 4(a), and to ensure that it conforms with the requirements of this Agreement, the Securities Act and the policies, rules and regulations of the Commission as announced from time to time, for a period of one year
following the effective date of such Shelf Registration Statement (or such shorter period that will terminate when all the Transfer Restricted Securities covered by such Shelf Registration Statement have been sold pursuant to such Shelf Registration
Statement or otherwise cease to be Transfer Restricted Securities). The Issuer and each of the Guarantors shall be deemed not to have used commercially reasonable efforts to keep the Shelf Registration Statement effective during the requisite period
if the Issuer or any of the Guarantors voluntarily takes any action that would result in Holders of Transfer Restricted Securities covered thereby not being able to offer and sell such Transfer Restricted Securities during that period, unless
(X) such action is required by applicable law; or (Y) such action is taken by the Issuer or any of the Guarantors in good faith and for valid business reasons (not including avoidance of the Issuer’s or the Guarantors’
obligations hereunder) including, but not limited to, the acquisition or divestiture of assets, so long as the Issuer and the Guarantors promptly thereafter comply with the requirements of the last paragraph of Section 6(c) hereof (the period
during which the Shelf Registration Statement is not available under clauses (X) or (Y) above, the “Blackout Period”). The Blackout Period shall not exceed 45 days in any three-month period or 90 days in any
twelve-month period. 
 (b) Provision by Holders of Certain Information in Connection with the Shelf Registration Statement.
No Holder of Transfer Restricted Securities may include any of its Transfer Restricted Securities in any Shelf Registration Statement pursuant to this Agreement unless and until such Holder furnishes to the Issuer in writing, within ten Business
Days after receipt of a request therefor, such information as the Issuer may reasonably request for use in connection with any Shelf Registration Statement or Prospectus or preliminary Prospectus included therein. Each Holder as to which any Shelf
Registration Statement is being effected agrees to furnish promptly to the Issuer all information required to be disclosed in order to make the information previously furnished to the Issuer by such Holder not materially misleading. 

SECTION 5. Additional Interest. If (a) the Exchange Offer is not Consummated on or prior to the Exchange Deadline, (b) a
Shelf Registration Statement applicable to the Transfer Restricted Securities required to be filed by the terms of this Agreement is not declared effective (or does not automatically become effective) on or prior to the 180th calendar day following
any Shelf Filing Deadline (or if such 180th day is not a Business Day, the next succeeding Business Day), or (c) a Shelf Registration Statement applicable to the Transfer Restricted Securities required to be filed by the terms of this Agreement
is declared effective (or automatically becomes effective) as required but thereafter fails to remain effective or becomes unusable in connection with resales for more than 30 calendar days, excluding any Blackout Period (each such event referred to
in clauses (a) through (c) above, a “Registration Default”), the Issuer 

  
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hereby agrees that the interest rate borne by the Transfer Restricted Securities shall be increased by 0.25% per annum during the 90-day period immediately following the occurrence of any
Registration Default and shall increase by 0.25% per annum at the end of each subsequent 90-day period (“Additional Interest”), in each case until the Registration Default no longer exists; provided, however, that at no
time shall the amount of the Additional Interest exceed in the aggregate 1.0% per annum. The Issuer shall not be obligated to pay Additional Interest for more than one Registration Default at any given time. Following the cure of all
Registration Defaults, Additional Interest will cease to accrue and the interest rate on the Transfer Restricted Securities will revert to the original rate; provided, however, that, if after the date such Additional Interest ceases to
accrue, another Registration Default occurs, Additional Interest will again commence accruing pursuant to the foregoing provisions. 
 All obligations of the Issuer and the Guarantors set forth in the preceding paragraph that are outstanding with respect to any Transfer Restricted Security at the time such security ceases to be a
Transfer Restricted Security shall survive until such time as all such obligations with respect to such security shall have been satisfied in full. 
 SECTION 6. Registration Procedures. 
 (a) Exchange Offer Registration
Statement. In connection with the Exchange Offer, the Issuer and the Guarantors shall comply with all of the applicable provisions of Section 6(c) hereof, shall use commercially reasonable efforts to effect such exchange to permit the sale
of Transfer Restricted Securities being sold in accordance with the intended method or methods of distribution thereof. As a condition to its participation in the Exchange Offer pursuant to the terms of this Agreement, each Holder of Transfer
Restricted Securities shall furnish, upon the request of the Issuer, prior to the Consummation thereof, a written representation to the Issuer (which may be contained in the letter of transmittal contemplated by the Exchange Offer Registration
Statement) to the effect that (A) it is not an Affiliate of the Issuer or the Guarantors, (B) it is not engaged in, and does not intend to engage in, and has no arrangement or understanding with any Person to participate in, a distribution
(within the meaning of the Securities Act) of the Exchange Securities to be issued in the Exchange Offer and (C) it is acquiring the Exchange Securities in its ordinary course of business. In addition, all such Holders of Transfer Restricted
Securities shall otherwise cooperate in the Issuer’s preparations for the Exchange Offer. Each Holder hereby acknowledges and agrees that any Broker-Dealer and any such Holder using the Exchange Offer to participate in a distribution of the
securities to be acquired in the Exchange Offer (1) could not under Commission policy as in effect on the date of this Agreement rely on the position of the Commission enunciated in Morgan Stanley and Co., Inc. (available June 5,
1991) and Exxon Capital Holdings Corporation (available May 13, 1988), as interpreted in the Commission’s letter to Shearman & Sterling dated July 2, 1993, and similar no-action letters, and (2) must comply with
the registration and prospectus delivery requirements of the Securities Act in connection with a secondary resale transaction and that such a secondary resale transaction should be covered by an effective registration statement containing the
selling security holder information required by Item 507 or 508, as applicable, of Regulation S-K if the resales are of Exchange Securities obtained by such Holder in exchange for Initial Securities acquired by such Holder directly from the
Issuers. 

  
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 (b) Shelf Registration Statement. In connection with any Shelf Registration
Statement, the Issuer and each of the Guarantors shall comply with all the provisions of Section 6(c) hereof and shall use commercially reasonable efforts to effect such registration to permit the sale of the Transfer Restricted Securities
being sold in accordance with the intended method or methods of distribution thereof, and pursuant thereto the Issuer and each of the Guarantors will as expeditiously as possible prepare and file with the Commission a Registration Statement relating
to the registration on any appropriate form under the Securities Act, which form shall be available for the sale of the Transfer Restricted Securities in accordance with the intended method or methods of distribution thereof. 

(c) General Provisions. In connection with any Registration Statement and any Prospectus required by this Agreement to permit the
sale or resale of Transfer Restricted Securities (including, without limitation, any Registration Statement and the related Prospectus required to permit resales of Initial Securities by Broker-Dealers), the Issuer and each of the Guarantors shall:

 (i) use commercially reasonable efforts to keep such Registration Statement continuously effective and
provide all requisite financial statements (including, if required by the Securities Act or any regulation thereunder, financial statements of the Guarantors) for the period specified in Section 3 or 4 hereof, as applicable; upon the occurrence
of any event that would cause any such Registration Statement or the Prospectus contained therein (A) to contain a material misstatement or omission or (B) not to be effective and usable for resale of Transfer Restricted Securities during
the period required by this Agreement, the Issuer shall file promptly an appropriate amendment to such Registration Statement, in the case of clause (A), correcting any such misstatement or omission, and, in the case of either clause (A) or
(B), use commercially reasonable efforts to cause such amendment to be declared effective and such Registration Statement and the related Prospectus to become usable for their intended purposes as soon as practicable thereafter; 

(ii) prepare and file with the Commission such amendments and post-effective amendments to the applicable Registration
Statement as may be necessary to keep the Registration Statement effective for the applicable period set forth in Section 3 or 4 hereof, as applicable, or such shorter period as will terminate when all Transfer Restricted Securities covered by
such Registration Statement have been sold; cause the Prospectus to be supplemented by any required prospectus supplement, and as so supplemented to be filed pursuant to Rule 424 under the Securities Act, and to comply fully with the applicable
provisions of Rules 424, 430A and 430B under the Securities Act in a timely manner; and comply with the provisions of the Securities Act with respect to the disposition of all securities covered by such Registration Statement during the

  
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applicable period in accordance with the intended method or methods of distribution by the sellers thereof set forth in such Registration Statement or supplement to the Prospectus; 

(iii) advise the underwriters, if any, and selling Holders promptly and, if requested by such Persons, to confirm such
advice in writing, (A) when the Prospectus or any prospectus supplement or post-effective amendment has been filed, and, with respect to any Registration Statement or any post-effective amendment thereto, when the same has become effective,
(B) of any request by the Commission for amendments to the Registration Statement or amendments or supplements to the Prospectus or for additional information relating thereto, (C) of the issuance by the Commission of any stop order
suspending the effectiveness of the Registration Statement under the Securities Act or of the suspension by any state securities commission of the qualification of the Transfer Restricted Securities for offering or sale in any jurisdiction, or the
initiation of any proceeding for any of the preceding purposes, (D) of the existence of any fact or the happening of any event that makes any statement of a material fact made in the Registration Statement, the Prospectus, any amendment or
supplement thereto, or any document incorporated by reference therein untrue, or that requires the making of any additions to or changes in the Registration Statement or the Prospectus in order to make the statements therein (with respect to the
Prospectus, in the light of the circumstances under which they were made) not misleading. If at any time the Commission shall issue any stop order suspending the effectiveness of the Registration Statement, or any state securities commission or
other regulatory authority shall issue an order suspending the qualification or exemption from qualification of the Transfer Restricted Securities under state securities or blue sky laws, each of the Issuer and the Guarantors shall use commercially
reasonable efforts to obtain the withdrawal or lifting of such order at the earliest possible time; 
 (iv)
furnish without charge to the Initial Purchaser, each selling Holder named in any Registration Statement, and each underwriter, if any, before filing with the Commission, copies of any Registration Statement or any Prospectus included therein or any
amendments or supplements to any such Registration Statement or Prospectus, which documents will be subject to the review and comment of such Holders and underwriters in connection with such sale, if any, for a period of at least five Business Days,
and the Issuer will not file any such Registration Statement or Prospectus or any amendment or supplement to any such Registration Statement or Prospectus (including all such documents incorporated by reference) to which the Initial Purchaser or the
underwriters, if any, shall reasonably object in writing within five Business Days after the receipt thereof (such objection to be deemed timely made upon confirmation of telecopy transmission within such period); provided, that this clause
(iv) shall not apply to any filing by the Issuer of any Annual Report on Form 10-K, Quarterly Report on Form 10-Q or Current Report on Form 8-K with respect to matters unrelated to the Initial Securities,

  
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the Transfer Restricted Securities and the Exchange Securities and the offering or exchange therefor. The objection of the Initial Purchaser or an underwriter, if any, shall be deemed to be
reasonable if such Registration Statement, amendment, Prospectus or supplement, as applicable, as proposed to be filed, contains a material misstatement or omission; 

(v) in the case of a Shelf Registration Statement, make available during normal business hours for inspection by the
Initial Purchaser, the managing underwriters, if any, participating in any disposition pursuant to such Registration Statement and any attorney or accountant retained by the Initial Purchaser or any of the underwriters, all financial and other
records, pertinent corporate documents and properties of the Issuer and each of the Guarantors and cause the Issuer’s and the Guarantors’ officers, directors and employees to supply all information reasonably requested by any such Holder,
underwriter, attorney or accountant in connection with such Registration Statement or any post-effective amendment thereto subsequent to the filing thereof and prior to its effectiveness and to participate in meetings with investors to the extent
requested by the managing underwriters, if any; 
 (vi) if requested by any selling Holders or the underwriters,
if any, promptly incorporate in any Registration Statement or Prospectus, pursuant to a supplement or post-effective amendment if necessary, such information as such selling Holders and underwriters, if any, may reasonably request to have included
therein, including, without limitation, information relating to the “Plan of Distribution” of the Transfer Restricted Securities, information with respect to the principal amount of Transfer Restricted Securities being sold to such
underwriters, the purchase price being paid therefor and any other terms of the offering of the Transfer Restricted Securities to be sold in such offering; and make all required filings of such Prospectus supplement or post-effective amendment as
soon as practicable after the Issuer is notified of the matters to be incorporated in such Prospectus supplement or post-effective amendment; 
 (vii) in the case of a Shelf Registration Statement, furnish to the Initial Purchaser, each selling Holder and each of the underwriters, if any, without charge, at least one copy of the Registration
Statement, as first filed with the Commission, and of each amendment thereto, including financial statements and schedules, all documents incorporated by reference therein and all exhibits (including exhibits incorporated therein by reference);

 (viii) deliver to each selling Holder and each of the underwriters, if any, without charge, as many copies of
the Prospectus (including each preliminary prospectus) and any amendment or supplement thereto as such Persons may reasonably request; the Issuer and each of the Guarantors hereby consents to the use of the Prospectus and any amendment or supplement
thereto by each of the selling Holders and each of the underwriters, if any, in connection with the offering and the sale of the Transfer Restricted Securities covered by the Prospectus or any amendment or supplement thereto; 

  
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 (ix) in the case of a Shelf Registration Statement, enter into such
agreements (including an underwriting agreement), and make such representations and warranties, and take all such other actions in connection therewith in order to expedite or facilitate the disposition of the Transfer Restricted Securities pursuant
to any Registration Statement contemplated by this Agreement, all to such extent as may be reasonably requested by the Initial Purchaser or by any Holder of Transfer Restricted Securities or underwriter in connection with any sale or resale pursuant
to any Registration Statement contemplated by this Agreement; and, whether or not an underwriting agreement is entered into and whether or not the registration is an Underwritten Registration, each of the Issuer and the Guarantors shall: 

(A) furnish to the Initial Purchaser, each selling Holder and each underwriter, if any, in such substance and scope as
they may reasonably request and as are customarily made by issuers to underwriters in primary underwritten offerings, upon the effectiveness of the Shelf Registration Statement: 

(1) a certificate, dated the date of effectiveness of the Shelf Registration Statement signed by (y) the Chief
Executive Officer, the President or any Vice President and (z) a principal financial or accounting officer of the Issuer and each of the Guarantors, confirming, as of the date thereof, the matters set forth in Section 6(d) of the Purchase
Agreement; 
 (2) an opinion, dated the date of effectiveness of the Shelf Registration Statement, as the case
may be, of counsel for the Issuer and the Guarantors, covering the matters set forth in Sections 6(a) and 6(b) of the Purchase Agreement and such other matter as such parties may reasonably request, and in any event including a statement to the
effect that such counsel has participated in conferences with officers and other representatives of the Issuer and the Guarantors, representatives of the independent public accountants for the Issuer and the Guarantors, representatives of the
underwriters, if any, and counsel to the underwriters, if any, in connection with the preparation of such Shelf Registration Statement and the related Prospectus and have considered the matters required to be stated therein and the statements
contained therein, although such counsel has not independently verified the accuracy, completeness or fairness of such statements; and that such counsel advises that, on the basis of such participation, no facts came to such counsel’s attention
that caused such counsel to believe that the Shelf Registration Statement, at the time such Shelf Registration Statement became effective, and contained an untrue statement of a material fact or omitted to state a material fact

  
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required to be stated therein or necessary to make the statements therein not misleading, or that the Prospectus contained in such Registration Statement as of its date contained an untrue
statement of a material fact or omitted to state a material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading. Without limiting the foregoing, such counsel may state
further that such counsel assumes no responsibility for, and has not independently verified, the accuracy, completeness or fairness of the financial statements, notes and schedules and other financial, accounting and reserve data included in any
Shelf Registration Statement contemplated by this Agreement or the related Prospectus; and 
 (3) a customary
comfort letter, dated the date of effectiveness of the Shelf Registration Statement, from the Issuer’s independent accountants (and, if necessary, any other independent certified public accountants of any subsidiary of the Issuer or of any
business acquired by the Issuer for which financial statements and financial data are, or are required to be, included or incorporated by reference in the Registration Statement), in the customary form and covering matters of the type customarily
requested to be covered in comfort letters by underwriters in connection with primary underwritten offerings, and covering or affirming the matters set forth in the comfort letters delivered pursuant to Section 6(e) of the Purchase Agreement,
without exception; 
 (B) set forth in full or incorporate by reference in the underwriting agreement, if any,
the indemnification provisions and procedures of Section 8 hereof with respect to all parties to be indemnified pursuant to said Section; and 
 (C) deliver such other documents and certificates as may be reasonably requested by such parties to evidence compliance with Section 6(c)(ix)(A) hereof and with any customary conditions contained in
the underwriting agreement or other agreement entered into by the Issuer or any of the Guarantors pursuant to this Section 6(c)(ix), if any. 
 If at any time the representations and warranties of the Issuer and the Guarantors contemplated in Section 6(c)(ix)(A)(1) hereof cease to be true and correct, the Issuer or the Guarantors shall so
advise the Initial Purchaser and the underwriters, if any, and each selling Holder promptly and, if requested by such Persons, shall confirm such advice in writing; 

(x) prior to any public offering of Transfer Restricted Securities pursuant to a Shelf Registration Statement, cooperate
with the selling Holders, the underwriters, if any, and their respective counsel in connection with the registration and qualification of the 

  
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Transfer Restricted Securities under the state securities or blue sky laws of such jurisdictions as the selling Holders or underwriters, if any, may request and do any and all other acts or
things necessary or advisable to enable the disposition in such jurisdictions of the Transfer Restricted Securities covered by the Shelf Registration Statement; provided, however, that neither the Issuer nor any of the Guarantors shall be
required to register or qualify as a foreign entity where it is not then so qualified or to take any action that would subject it to the service of process in suits or to taxation in any jurisdiction where it is not then so subject; 

(xi) shall issue, in connection with the Consummation of the Exchange Offer and in accordance with the Indenture,
Exchange Securities having an aggregate principal amount equal to the aggregate principal amount of Initial Securities surrendered to the Issuer by the Holders in exchange therefore; 

(xii) cooperate with the selling Holders and the underwriters, if any, to facilitate the timely preparation and delivery
of certificates representing Transfer Restricted Securities to be sold and not bearing any restrictive legends; and enable such Transfer Restricted Securities to be in such denominations and registered in such names as the Holders or the
underwriters, if any, may request at least two Business Days prior to any sale of Transfer Restricted Securities made by such Holders or underwriters; 
 (xiii) use commercially reasonable efforts to cause the Transfer Restricted Securities covered by the Registration Statement to be registered with or approved by such other domestic governmental agencies
or authorities as may be necessary to enable the seller or sellers thereof or the underwriters, if any, to consummate the disposition of such Transfer Restricted Securities, subject to the proviso contained in Section 6(c)(x) hereof;

 (xiv) if any fact or event contemplated by Section 6(c)(iii)(D) hereof shall exist or have occurred,
prepare a supplement or post-effective amendment to the Registration Statement or related Prospectus or any document incorporated therein by reference or file any other required document so that, as thereafter delivered to the purchasers of Transfer
Restricted Securities, the Prospectus will not contain an untrue statement of a material fact or omit to state any material fact necessary in order to make the statements therein, in light of the circumstances under which they were made, not
misleading; 
 (xv) provide a CUSIP number for all Exchange Securities not later than the effective date of the
Registration Statement covering such Exchange Securities and provide the Trustee under the Indenture with printed certificates for such Exchange Securities which are in a form eligible for deposit with the Depository Trust Company and take all other
action necessary to ensure that all such Exchange Securities are eligible for deposit with the Depository Trust Company; 

  
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 (xvi) cooperate and assist in any filings required to be made with the FINRA
and in the performance of any due diligence investigation by any underwriter (including any “qualified independent underwriter” as that term is defined within the rules and regulations of the FINRA) that is required to be retained in
accordance with the rules and regulations of the FINRA; 
 (xvii) otherwise use commercially reasonable efforts
to comply with all applicable rules and regulations of the Commission, and make generally available to its security holders, as soon as practicable, a consolidated earnings statement meeting the requirements of Rule 158 under the Securities Act
(which need not be audited) for the twelve-month period (A) commencing at the end of any fiscal quarter in which Transfer Restricted Securities are sold to underwriters in a firm commitment or best efforts Underwritten Offering or (B) if
not sold to underwriters in such an offering, beginning with the first month of the Issuer’s first fiscal quarter commencing after the effective date of the Registration Statement; 

(xviii) cause the Indenture to be qualified under the Trust Indenture Act not later than the effective date of the first
Registration Statement required by this Agreement, and, in connection therewith, cooperate with the Trustee and the Holders of the Initial Securities to effect such changes to the Indenture as may be required for such Indenture to be so qualified in
accordance with the terms of the Trust Indenture Act; and to execute, and use commercially reasonable efforts to cause the Trustee to execute, all documents that may be required to effect such changes and all other forms and documents required to be
filed with the Commission to enable such Indenture to be so qualified in a timely manner; and 
 (xix) in the
case of a Shelf Registration Statement, cause all Transfer Restricted Securities covered by such Shelf Registration Statement to be listed on each securities exchange or automated quotation system on which similar securities issued by the Issuer are
then listed if requested by the Holders of a majority in aggregate principal amount of Initial Securities or the managing underwriters, if any. 
 Each Holder agrees by acquisition of a Transfer Restricted Security that, upon receipt of any notice from the Issuer of the existence of any fact of the kind described in Section 6(c)(iii)(D) hereof
or any Blackout Period described in Section 4(a) hereof, such Holder will forthwith discontinue disposition of Transfer Restricted Securities pursuant to the applicable Registration Statement until such Holder’s receipt of the copies of
the supplemented or amended Prospectus contemplated by Section 6(c)(xiv) hereof, or until it is advised in writing (the “Advice”) by the Issuer that the use of the Prospectus may be resumed, and has received copies of
any additional or supplemental filings that are incorporated by reference in the Prospectus. If so directed by the Issuers, each Holder will deliver to the Issuer (at the Issuer’s expense) all copies, other than permanent file copies then in
such Holder’s possession, of the Prospectus covering such Transfer Restricted Securities that was current at the time of receipt of such notice. 

  
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In the event the Issuer shall give any such notice, the time period regarding the effectiveness of such Registration Statement set forth in Section 3 or 4 hereof, as applicable, shall be
extended by the number of days during the period from and including the date of the giving of such notice pursuant to Section 6(c)(iii)(D) hereof or notice of any Blackout Period to and including the date when each selling Holder covered by
such Registration Statement shall have received the copies of the supplemented or amended Prospectus contemplated by Section 6(c)(xiv) hereof or shall have received the Advice. 

SECTION 7. Registration Expenses. 
 (a) All expenses incident to the Issuer’s and the Guarantors’ performance of or compliance with this Agreement will be borne by the Issuer and the Guarantors, jointly and severally, regardless
of whether a Registration Statement becomes effective, including, without limitation: (i) all registration and filing fees and expenses (including filings made by the Initial Purchaser or any Holder with the FINRA (and, if applicable, the fees
and expenses of any “qualified independent underwriter” and its counsel that may be required by the rules and regulations of the FINRA)); (ii) all fees and expenses of compliance with federal securities and state securities or blue
sky laws; (iii) all expenses of printing (including printing of Prospectuses), if any, messenger and delivery services and telephone; (iv) all fees and disbursements of counsel for the Issuers, the Guarantors and, subject to
Section 7(b) hereof, the Holders of Transfer Restricted Securities; and (v) all fees and disbursements of independent certified public accountants of the Issuer and the Guarantors (including the expenses of any special audit and comfort
letters required by or incident to such performance). 
 Each of the Issuer and the Guarantors will, in any event, bear its
internal expenses (including, without limitation, all salaries and expenses of its officers and employees performing legal or accounting duties), the expenses of any annual audit and the fees and expenses of any Person, including special experts,
retained by the Issuer or the Guarantors. 
 (b) In connection with any Shelf Registration Statement required by this Agreement,
the Issuer and the Guarantors, jointly and severally, will reimburse the Initial Purchaser and the Holders of Transfer Restricted Securities being registered pursuant to the Shelf Registration Statement, as applicable, for the reasonable fees and
disbursements of not more than one counsel, who shall be Baker Botts L.L.P. or such other counsel as may be chosen by the Holders of a majority in principal amount of the Transfer Restricted Securities for whose benefit such Registration Statement
is being prepared. 
 SECTION 8. Indemnification. 

(a) The Issuer and the Guarantors, jointly and severally, agree to indemnify and hold harmless (i) each Holder and (ii) each
Person, if any, who controls (within the meaning of Section 15 of the Securities Act or Section 20 of the Exchange Act) any Holder (any of the Persons referred to in this clause (ii) being hereinafter referred to as a
“controlling person”) and 

  
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(iii) the respective officers, directors, partners, employees, representatives and agents of any Holder or any controlling person (any Person referred to in clause (i), (ii) or
(iii) may hereinafter be referred to as an “Indemnified Holder”), to the fullest extent lawful, from and against any and all losses, claims, damages or liabilities (or actions in respect thereof) including, without
limitation, and as incurred, reimbursement of each such Indemnified Holder for any legal or other expenses reasonably incurred by them in connection with investigating or defending any such loss, claim, damage, liability or action, joint or several,
directly or indirectly arising out of or based upon any untrue statement or alleged untrue statement of a material fact contained in any Registration Statement or Prospectus (or any amendment or supplement thereto), or any omission or alleged
omission to state therein a material fact required to be stated therein or necessary to make the statements therein (with respect to the Prospectus, in the light of the circumstances under which they were made) not misleading, except insofar as such
losses, claims, damages, liabilities or actions are caused by an untrue statement or omission or alleged untrue statement or omission that is made in reliance upon and in conformity with information relating to any of the Holders furnished in
writing to the Issuer or any of the Guarantors by any of the Holders expressly for use therein. This indemnity agreement shall be in addition to any liability which the Issuer or any of the Guarantors may otherwise have. 

In case any action or proceeding (including any governmental or regulatory investigation or proceeding) shall be brought or asserted
against any of the Indemnified Holders with respect to which indemnity may be sought against the Issuer or the Guarantors, such Indemnified Holder (or the Indemnified Holder controlled by such controlling person) shall promptly notify the Issuer and
the Guarantors in writing; provided, however, that the failure to give such notice shall not relieve the Issuer or any of the Guarantors of their respective obligations pursuant to this Agreement. Such Indemnified Holder shall have the right
to employ its own counsel in any such action and the fees and expenses of such counsel shall be paid, as incurred, by the Issuer and the Guarantors (regardless of whether it is ultimately determined that an Indemnified Holder is not entitled to
indemnification hereunder). The Issuer and the Guarantors 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 liable for the reasonable fees and expenses of more than one separate firm of attorneys (in addition to any local counsel) at any time for such Indemnified Holders, which firm shall be designated by the
Holders. The Issuer and the Guarantors shall be liable for any settlement of any such action or proceeding effected with the Issuer’s and the Guarantors’ prior written consent, and the Issuer and each of the Guarantors agrees to indemnify
and hold harmless any Indemnified Holder from and against any loss, claim, damage, liability or expense by reason of any settlement of any action effected with the written consent of the Issuer and the Guarantors. The Issuer and the Guarantors shall
not, without the prior written consent of each Indemnified Holder, settle or compromise or consent to the entry of judgment in or otherwise seek to terminate any pending or threatened action, claim, litigation or proceeding in respect of which
indemnification or contribution may be sought hereunder (whether or not any Indemnified Holder is a party thereto), unless such settlement, compromise, consent or termination includes an unconditional release of each Indemnified Holder from all
liability arising out of such action, claim, litigation or proceeding. 

  
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 (b) Each Holder agrees, severally and not jointly, to indemnify and hold harmless the
Issuer, each of the Guarantors and the respective directors and officers of the Issuer and the Guarantors who sign a Registration Statement, and any Person controlling (within the meaning of Section 15 of the Securities Act or Section 20
of the Exchange Act) the Issuer or any of the Guarantors, and the respective officers, directors, partners, employees, representatives and agents of each such Person, to the same extent as the foregoing indemnity from the Issuer and each of the
Guarantors to each of the Indemnified Holders, but only with respect to claims and actions based on information relating to such Holder furnished in writing by such Holder expressly for use in any Registration Statement or Prospectus. In case any
action or proceeding shall be brought against the Issuer, the Guarantors or their respective directors or officers or any such controlling person in respect of which indemnity may be sought against a Holder of Transfer Restricted Securities, such
Holder shall have the rights and duties given the Issuer and the Guarantors, and the Issuers, the Guarantors, their respective directors and officers and such controlling person shall have the rights and duties given to each Holder by the preceding
paragraph. 
 (c) If the indemnification provided for in this Section 8 is unavailable to an indemnified party under
Section 8(a) or (b) hereof (other than by reason of exceptions provided in those Sections) in respect of any losses, claims, damages, liabilities or actions referred to therein, then each applicable indemnifying party, in lieu of
indemnifying such indemnified party, shall contribute to the amount paid or payable by such indemnified party as a result of such losses, claims, damages or liabilities in such proportion as is appropriate to reflect the relative benefits received
by the Issuer and the Guarantors, on the one hand, and the Holders, on the other hand, from the Initial Placement (which in the case of the Issuer and the Guarantors shall be deemed to be equal to the total gross proceeds to the Issuer and the
Guarantors from the Initial Placement), the amount of Additional Interest which did not become payable as a result of the filing of the Registration Statement resulting in such losses, claims, damages, liabilities or actions, and such Registration
Statement, or if such allocation is not permitted by applicable law, the relative fault of the Issuer and the Guarantors, on the one hand, and the Holders, on the other hand, in connection with the statements or omissions which resulted in such
losses, claims, damages or liabilities, as well as any other relevant equitable considerations. The relative fault of the Issuer and the Guarantors on the one hand and of the Indemnified Holder on the other shall be determined by reference to, among
other things, whether the untrue or alleged untrue statement of a material fact or the omission or alleged omission to state a material fact relates to information supplied by the Issuer or any of the Guarantors, on the one hand, or the Indemnified
Holders, on the other hand, and the parties’ relative intent, knowledge, access to information and opportunity to correct or prevent such statement or omission. The amount paid or payable by a party as a result of the losses, claims, damages,
liabilities and actions referred to above shall be deemed to include, subject to the limitations set forth in the second paragraph of Section 8(a) hereof, any legal or other fees or expenses reasonably incurred by such party in connection with
investigating or defending any action or claim. 

  
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 The Issuer, the Guarantors and each Holder agree that it would not be just and equitable if
contribution pursuant to this Section 8(c) were determined by pro rata allocation (even if the Holders were treated as one entity for such purpose) or by any other method of allocation which does not take account of the equitable considerations
referred to in the immediately preceding paragraph. The amount paid or payable by an indemnified party as a result of the losses, claims, damages, liabilities or actions referred to in the immediately preceding paragraph shall be deemed to include,
subject to the limitations set forth above, any legal or other expenses reasonably incurred by such indemnified party in connection with investigating or defending any such action or claim. Notwithstanding the provisions of this Section 8, none
of the Holders (and its related Indemnified Holders) shall be required to contribute, in the aggregate, any amount in excess of the amount by which the total discount received by such Holder with respect to the Initial Securities exceeds the amount
of any damages which such Holder has otherwise been required to pay by reason of such untrue or alleged untrue statement or omission or alleged omission. 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. The Holders’ obligations to contribute pursuant to this Section 8(c) are several in proportion to the respective
principal amount of Initial Securities held by each of the Holders hereunder and not joint. 
 SECTION 9. Rule 144A. Each
of the Issuer and the Guarantors hereby agrees with each Holder, for so long as any Transfer Restricted Securities remain outstanding, to make available to any Holder or beneficial owner of Transfer Restricted Securities in connection with any sale
thereof and any prospective purchaser of such Transfer Restricted Securities from such Holder or beneficial owner, the information required by Rule 144A(d)(4) under the Securities Act in order to permit resales of such Transfer Restricted Securities
pursuant to Rule 144A under the Securities Act. 
 SECTION 10. Participation in Underwritten Registrations. No Holder may
participate in any Underwritten Registration hereunder unless such Holder (a) agrees to sell such Holder’s Transfer Restricted Securities on the basis provided in any underwriting arrangements approved by the Persons entitled hereunder to
approve such arrangements and (b) completes and executes all reasonable questionnaires, powers of attorney, indemnities, underwriting agreements, lock-up letters and other documents required under the terms of such underwriting arrangements.

 SECTION 11. Selection of Underwriters. The Holders of Transfer Restricted Securities covered by the Shelf Registration
Statement who desire to do so may sell such Transfer Restricted Securities in an Underwritten Offering. In any such Underwritten Offering, the investment bankers and managing underwriter(s) that will administer such offering will be selected by the
Holders of a majority in aggregate principal amount of the Transfer Restricted Securities included in such offering; provided, however, that such investment banker(s) and managing underwriters must be reasonably satisfactory to the Issuer.

  
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 SECTION 12. Miscellaneous. 

(a) Remedies. The Issuer and each of the Guarantors hereby agrees that monetary damages would not be adequate compensation for any
loss incurred by reason of a breach by it of the provisions of this Agreement and hereby agree to waive the defense in any action for specific performance that a remedy at law would be adequate. 

(b) No Inconsistent Agreements. The Issuer and each of the Guarantors will not on or after the date of this Agreement enter into
any agreement with respect to its securities that is inconsistent with the rights granted to the Holders in this Agreement or otherwise conflicts with the provisions hereof. The rights granted to the Holders hereunder do not in any way conflict with
and are not inconsistent with the rights granted to the holders of the Issuer’s or any of the Guarantors’ securities under any agreement in effect on the date hereof. 

(c) Adjustments Affecting the Securities. The Issuer will not take any action, or permit any change to occur, with respect to the
Initial Securities that would materially and adversely affect the ability of the Holders to Consummate any Exchange Offer. 

(d) Amendments and Waivers. The provisions of this Agreement may not be amended, modified or supplemented, and waivers or consents
to or departures from the provisions hereof may not be given unless the Issuer has (i) in the case of Section 5 hereof and this Section 12(d)(i), obtained the written consent of Holders of all outstanding Transfer Restricted
Securities and (ii) in the case of all other provisions hereof, obtained the written consent of Holders of a majority of the outstanding principal amount of Transfer Restricted Securities (excluding any Transfer Restricted Securities held by
the Issuer or its Affiliates). Notwithstanding the foregoing, a waiver or consent to departure from the provisions hereof that relates exclusively to the rights of Holders whose securities are being tendered pursuant to the Exchange Offer and that
does not affect directly or indirectly the rights of other Holders whose securities are not being tendered pursuant to such Exchange Offer may be given by the Holders of a majority of the outstanding principal amount of Transfer Restricted
Securities being tendered or registered; provided, however, that, with respect to any matter that directly or indirectly affects the rights of the Initial Purchaser hereunder, the Issuer shall obtain the written consent of the Initial
Purchaser with respect to which such amendment, qualification, supplement, waiver, consent or departure is to be effective. 

(e) Notices. All notices and other communications provided for or permitted hereunder shall be made in writing by hand-delivery,
first-class mail (registered or certified, return receipt requested), telex, telecopier, or air courier guaranteeing overnight delivery: 

  
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 (i) if to a Holder, at the address set forth on the records of the Trustee
under the Indenture, with a copy to the Trustee under the Indenture; and 
 (ii) if to the Issuer: 

Endeavour International Corporation 

811 Main Street, Suite 2100 
 Houston, TX 77002 
 Facsimile: (813) 307-8794 

Attention: J. Michael Kirksey 
 with a copy (which shall not constitute notice) to: 

Vinson & Elkins L.L.P. 

1001 Fannin Street 
 Houston, TX 77002 
 Facsimile: (713) 615-5531 

Attention: T. Mark Kelly 
 All such notices and communications shall be deemed to have been duly given: at the time delivered by hand, if personally delivered; five Business Days after being deposited in the mail, postage prepaid,
if mailed; when answered back, if telexed; when receipt acknowledged, if telecopied; and on the next Business Day, if timely delivered to an air courier guaranteeing overnight delivery. 

Copies of all such notices, demands or other communications shall be concurrently delivered by the Person giving the same to the Trustee
at the address specified in the Indenture. 
 (f) Successors and Assigns. This Agreement shall inure to the benefit of
and be binding upon the successors and assigns of each of the parties, including, without limitation, and without the need for an express assignment, subsequent Holders of Transfer Restricted Securities; provided, however, that this Agreement
shall not inure to the benefit of or be binding upon a successor or assign of a Holder unless and to the extent such successor or assign acquired Transfer Restricted Securities from such Holder. 

(g) Counterparts. This Agreement may be executed in any number of counterparts and by the parties hereto in separate counterparts,
each of which when so executed shall be deemed to be an original and all of which taken together shall constitute one and the same agreement. 
 (h) Headings. The headings in this Agreement are for convenience of reference only and shall not limit or otherwise affect the meaning hereof. 

  
 -21-

 (i) Governing Law. THIS AGREEMENT SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE
WITH THE LAWS OF THE STATE OF NEW YORK, WITHOUT REGARD TO THE CONFLICTS OF LAW RULES THEREOF. 
 (j) Severability. In the
event that any one or more of the provisions contained herein, or the application thereof in any circumstance, is held invalid, illegal or unenforceable, the validity, legality and enforceability of any such provision in every other respect and of
the remaining provisions contained herein shall not be affected or impaired thereby. 
 (k) 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. There are
no restrictions, promises, warranties or undertakings, other than those set forth or referred to herein with respect to the registration rights granted by the Issuer with respect to the Transfer Restricted Securities. This Agreement supersedes all
prior agreements and understandings between the parties with respect to such subject matter. 
 [signature page follows]

  
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 IN WITNESS WHEREOF, the parties have executed this Agreement as of the date first written
above. 
  

			
	COMPANY
	
	ENDEAVOUR INTERNATIONAL CORPORATION
		
	By:	 	/s/ J. Michael Kirksey
		 	J. Michael Kirksey
		 	Executive Vice President and Chief Financial Officer

  

			
	GUARANTORS
	
	ENDEAVOUR OPERATING CORPORATION
	ENDEAVOUR ENERGY NEW VENTURES INC.
	END MANAGEMENT COMPANY
		
	By:	 	/s/ J. Michael Kirksey
		 	J. Michael Kirksey
		 	Executive Vice President and Chief Financial Officer

 The foregoing Registration Rights Agreement is hereby confirmed and accepted as of the date first above
written: 
  

			
	CITIGROUP GLOBAL MARKETS INC.
		
	By:	 	/s/ Christopher Abatte
		 	Name:  Christopher Abatte
		 	Title:    Managing Director

 SCHEDULE A 

Guarantors 
 Endeavour
Operating Company 
 Endeavour Energy New Ventures Inc. 
 Endeavour Management Company

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