Document:

Exhibit 10.1 

 

September 18, 2017

 

Mr. Richard A. Zaremba

c/o MISONIX, INC.

1938 New Highway

Farmingdale, New York 11735

 

Dear Richard:

 

This letter will serve to modify the letter
agreement dated September 15, 2016 (which amended and restated a prior letter agreement dated November 14, 2011) (collectively,
the “Original Letter Agreement”), by and between you and MISONIX, INC. (“Misonix”). To the extent there
are any discrepancies between this letter (the “Amendment”) and the Original Letter Agreement, this Amendment shall
control. Except as expressly provided herein, the Original Letter Agreement remains in full force and effect.

 

1.                 
Effective September 18, 2017 (the “Effective Date”), you hereby relinquish your titles of Senior Vice President,
Finance, Treasurer and Secretary and shall assume the sole title of Special Projects Manager. In this capacity you shall serve
as an individual contributor with primary responsibility for business development, activities related to the anticipated relocation
of the Misonix office, and other tasks as assigned by the Chief Executive Officer or his designee. You will no longer be considered
an executive officer of the Company for purposes of Section 16 of the Securities Exchange Act of 1934, as amended.

 

2.                 
Your position as Special Projects Manager shall be on a part-time basis requiring that you dedicate approximately 20 hours
per week to the performance of your assigned responsibilities. Except as business demands may require, you will spend approximately
one day per week working out of the Misonix office and two days per week working from home.

 

3.                 
Your annual base salary shall be one hundred twenty one thousand six hundred and sixty eight dollars ($121,668), less applicable
tax and other mandatary withholdings, payable in accordance with Misonix’ standard payroll practices.

 

4.                 
You will continue to participate in the Misonix benefits plans in accordance with the terms and conditions of those plans
at levels and/or rates not less than those in effect for you on the date here of.The first sentence of Section 2 of the Original
Letter Amendment is deleted in its entirety and replaced as of the Effective Date with the following: “In the event your
employment with Misonix is terminated by Misonix on or before September 18, 2019 for any reason other than Cause, Misonix will
continue your salary payments at the current rate ($121,668 per annum) through September 18, 2019.

 

5.                 
Section 9 of the Amendment is hereby modified to provide that notice to Misonix shall be provided solely to the Chief Executive
Officer (without a copy to the counsel listed in the Original Letter Agreement).

 

6.                 
Misonix will pay you all accrued vacation as of September 18, 2017 on September 30, 2017 and there will be no further vacation
payments accruing or payable during the remainder of your employment at Misonix.

 

    	 

    	 

    

 Kindly evidence your agreement with
the foregoing by signing and returning the enclosed duplicate copy of this letter agreement.

 

 

Sincerely,

 

MISONIX, INC.

 

By:_/s/ Stavros G. Vizirgianakis___

             Stavros
G. Vizirgianakis

             Chief Executive Officer

 

ACCEPTED AND AGREED TO AS OF

THE DATE FIRST SET FORTH ABOVE

 

 

__/s/ Richard A. Zaremba_______________

              Richard
A. ZarembaEX-10.1

 Exhibit 10.1 

EXECUTION VERSION 
 SemGroup
Corporation 
 $300,000,000 

7.250% Senior Notes due 2026 

Purchase Agreement 

September 15, 2017 
 Credit Suisse Securities
(USA) LLC 
 As Representative of the Initial Purchasers 

listed on Schedule I hereto 
 c/o Credit Suisse
Securities (USA) LLC 
 Eleven Madison Avenue 
 New York, New
York 10010-3629 
 Ladies and Gentlemen: 

SemGroup Corporation, a corporation organized under the laws of Delaware (the “Company”), proposes to issue and sell to the
several parties named in Schedule I hereto (the “Initial Purchasers”), for whom you (the “Representative”) are acting as representative, $300,000,000 aggregate principal amount of its 7.250% Senior Notes due
2026 (the “Notes”). The Notes will be guaranteed (the “Guarantees”) on a senior unsecured basis by each of the Guarantors (as defined below). The Notes and the Guarantees are hereinafter collectively referred to as
the “Securities.” The Securities will have the benefit of a registration rights agreement (the “Registration Rights Agreement”), to be dated as of the Closing Date (as defined below), between the Company, the
subsidiaries of the Company listed on the signature pages hereto (the “Guarantors”) and the Initial Purchasers, pursuant to which the Company and the Guarantors will agree to register the Securities under the Act subject to the
terms and conditions therein specified. The Securities are to be issued under an indenture, to be dated as of the Closing Date (the “Indenture”), among the Company, the Guarantors and Wilmington Trust, National Association, as
trustee (the “Trustee”). The term “Initial Purchasers” shall mean either the singular or plural as the context requires. The use of the neuter in this Agreement shall include the feminine and masculine wherever
appropriate. Certain terms used herein are defined in Section 22 hereof. 
 The sale of the Securities to the Initial Purchasers will
be made without registration of the Securities under the Act in reliance upon exemptions from the registration requirements of the Act. 

In connection with the sale of the Securities, the Company has prepared a preliminary offering circular, dated September 12, 2017 (as
amended or supplemented at the date thereof, the “Preliminary Memorandum”), and a final offering circular, dated September 15, 2017 (as amended or supplemented at the Execution Time, the “Final Memorandum”).
Each of the Preliminary Memorandum and the Final Memorandum sets forth certain information concerning the Company, the Guarantors and their respective subsidiaries and businesses, and the Securities. The Company hereby confirms that it has
authorized the use of the Disclosure 

 
Package, the Preliminary Memorandum and the Final Memorandum, and any amendment or supplement thereto, in connection with the offer and sale of the Securities by the Initial Purchasers. Any
reference in this Agreement to the Disclosure Package, the Preliminary Memorandum or the Final Memorandum shall be deemed to refer to and include the documents and filings incorporated by reference therein as of the effective date of the Disclosure
Package, the Preliminary Memorandum or the Final Memorandum, as applicable. 
 1. Representations and Warranties. The Company
represents and warrants to, and agrees with, each Initial Purchaser as set forth below in this Section 1. 
 (a) The
Preliminary Memorandum, at the date thereof, did not contain any untrue statement of a material fact or omit to state any material fact necessary to make the statements therein, in the light of the circumstances under which they were made, not
misleading. As of its date and on the Closing Date, the Final Memorandum did not and will not (and any amendment or supplement thereto, as of its date and on the Closing Date, will not) contain any untrue statement of a material fact or omit to
state any material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading; provided, however, that the Company makes no representation or warranty as to the
information contained in or omitted from the Preliminary Memorandum or the Final Memorandum, or any amendment or supplement thereto, in reliance upon and in conformity with information furnished in writing to the Company by or on behalf of the
Initial Purchasers through the Representative specifically for inclusion therein, it being understood and agreed that the only such information furnished by or on behalf of any Initial Purchaser consists of the information described as such in
Section 8(b) hereof. 
 (b) As of the Execution Time, (i) the Disclosure Package and (ii) any electronic
roadshow, when taken together as a whole with the Disclosure Package, did not contain any untrue statement of a material fact or omit to state any material fact necessary in order to make the statements therein, in the light of the circumstances
under which they were made, not misleading; provided, however, that the Company makes no representation or warranty as to the information contained in or omitted from the Disclosure Package or any such electronic roadshow in reliance
upon and in conformity with information furnished in writing to the Company by or on behalf of the Initial Purchasers through the Representative specifically for use therein, it being understood and agreed that the only such information furnished by
or on behalf of any Initial Purchaser consists of the information described as such in Section 8(b) hereof. 
 (c) None
of the Company, its Affiliates, or any person acting on its or their behalf (other than the Initial Purchasers and their respective Affiliates, as to whom the Company makes no representation or warranty) has, directly or indirectly, sold,
offered to sell, or solicited offers to buy, any “security” (as defined in the Act) that is or could be integrated for sale with the Notes in a manner that would require the registration of the Securities under the Act. 

  
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 (d) None of the Company, its Affiliates, or any person acting on its or their
behalf (other than the Initial Purchasers and their respective Affiliates, as to whom the Company makes no representation or warranty) has: (i) engaged in any form of general solicitation or general advertising (within the meaning of Rule 502
of Regulation D) in connection with any offer or sale of the Securities or (ii) engaged in any directed selling efforts (within the meaning of Regulation S) with respect to the Securities; and each of the Company, its Affiliates and any
person acting on its or their behalf (other than the Initial Purchasers and their respective Affiliates, as to whom the Company makes no representation or warranty) has complied with the offering restrictions requirement of Regulation S. 

(e) The Securities satisfy the eligibility requirements of Rule 144A(d)(3) under the Act. 

(f) Subject to the accuracy of the representations and warranties of the Initial Purchasers set forth in Section 4 hereof
and compliance by the Initial Purchasers with their agreements set forth herein, no registration under the Act of the Securities is required for the offer and sale of the Securities to or by the Initial Purchasers in the manner contemplated herein,
in the Disclosure Package and the Final Memorandum. 
 (g) The Company is not required, and after giving effect to the
offering and sale of the Securities and the application of the proceeds thereof as described under “Use of Proceeds” in the Disclosure Package and the Final Memorandum, the Company will not be required, to register as an “investment
company” as defined in the Investment Company Act. 
 (h) The Company has not paid or agreed to pay to any person any
compensation for soliciting another to purchase the Securities (except as contemplated in this Agreement). 
 (i) The Company
has not taken, directly or indirectly, any action designed to or that has constituted or that might reasonably be expected to cause or result, under the Exchange Act or otherwise, in stabilization or manipulation of the price of any security of the
Company to facilitate the sale or resale of the Securities. 
 (j) Each of the Company and its subsidiaries has been duly
incorporated or formed and is validly existing and in good standing under the laws of the jurisdiction of its organization with all requisite limited partnership, limited liability company or corporate power and authority, as the case may be, to own
or lease, as the case may be, and to operate its properties and conduct its business as described in the Disclosure Package and the Final Memorandum, and the Company and each Guarantor is duly qualified to do business as a foreign limited
partnership, limited liability company or corporation, as the case may be, and is in good standing under the laws of each jurisdiction in which its ownership or lease of property or the conduct of its businesses requires such qualification, except
for such jurisdictions where the failure to so qualify or to be in good standing would not, individually or in the aggregate, have a material adverse effect on the condition (financial or otherwise), prospects, earnings, business or properties of
the Company and its subsidiaries, taken as a whole, whether or not arising from transactions in the ordinary course of business (a “Material Adverse Effect”). 

  
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 (k) All of the issued and outstanding equity interests of the Company and each of
its subsidiaries (other than White Cliffs and GMP, which are addressed below) have been duly authorized and validly issued (in accordance with the bylaws or limited partnership or limited liability company agreement (collectively, the
“Organizational Agreements”) or the certificate of formation or incorporation, or other similar organizational document, in each case, as in effect on the date hereof (collectively, with the Organizational Agreements, the
“Organizational Documents”), as applicable, of such entity), are fully paid (in the case of an interest in a limited partnership or limited liability company, to the extent required under the Organizational Documents of such entity)
and nonassessable (except as such nonassessability may be affected by Sections 17-303, 17-607 and 17-804 of the Delaware Revised
Uniform Limited Partnership Act or Sections 18-607 and 18-804 of the Delaware Limited Liability Company Act (the “Delaware LLC Act”), as applicable, or
similar statutory provisions in other jurisdictions), and, except as otherwise set forth in the Disclosure Package and the Final Memorandum, all of the issued and outstanding equity interests of the Company’s subsidiaries (other than White
Cliffs and GMP, which are addressed below) are owned by the Company either directly or through wholly owned subsidiaries free and clear of any security interest, claim, lien or encumbrance (collectively, “Liens”), except for Liens
arising under or in connection with: (i) that certain Amended and Restated Credit Agreement, dated as of September 30, 2016, by and among the Company, as borrower, the guarantors named therein, the lenders named therein, and Wells Fargo
Bank, National Association, as administrative agent, as amended through the date of this Agreement (the “Credit Agreement”); (ii) that certain Guarantee, Pledge, and Security Agreement, dated as of July 17, 2017, by and among
Buffalo Parent Gulf Coast Terminals LLC, a Delaware limited liability company (“BPGCT”), Beachhead Holdings LLC, a Delaware limited liability company (“Holdings”), Beachhead I, LLC, Beachhead II, LLC, Buffalo
Investor I, L.P. and Buffalo Investor II, L.P. (the “HFOTCO Pledge Agreement”); (iii) (A) that certain Amended and Restated Bond Indenture (the “Series 2010 Indenture”), dated as of August 19, 2014,
between the Harris County Industrial Development Corporation, a non-profit corporation organized with the approval of Harris County, Texas, and existing pursuant to the Development Corporation Act, Chapter
501, Texas Local Government Code (“HCIDC”), and The Bank of New York Mellon Trust Company, National Association, as trustee, authorizing and securing $75 million Series 2010 Marine Terminal Revenue Bonds of HCIDC, (B) that
certain Amended and Restated Bond Indenture (the “Series 2011 Indenture”), dated as of August 19, 2014, between HCIDC and The Bank of New York Mellon Trust Company, National Association, as trustee, authorizing and securing
$50 million Series 2011 Marine Terminal Revenue Bonds of HCIDC, and (C) that certain Amended and Restated Bond Indenture (the “Series 2012 Indenture” and, together with the Series 2010 Indenture and the Series 2011
Indenture, the “IKE Bond Indentures”), dated as of August 19, 2014, between HCIDC and The Bank of New York Mellon Trust Company, National Association, as trustee, authorizing and securing $100 million Series 2012 Marine
Terminal Revenue Bonds of HCIDC; (iv) that certain Credit Agreement (as supplemented or modified prior to June 14, 2017, the “Existing HFOTCO Credit Agreement”), dated as of August 19, 2014, by and among BPGCT, as the
parent, HFOTCO LLC, a Texas limited liability company doing business as Houston Fuel Oil Company (“HFOTCO”), as the borrower, Morgan Stanley Senior Funding, Inc. 

  
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(“MSSF”), as administrative agent, Bank of America, N.A., as collateral agent, and the lenders party thereto, as modified pursuant to that certain Consent and Amendment
No. 1 to Credit Agreement, dated as of June 14, 2017 (the “HFOTCO Credit Agreement Amendment”; the Existing Credit Agreement, as modified by the HFOTCO Credit Agreement Amendment, the “HFOTCO Credit
Agreement”), by and among BPGCT, as the parent, HFOTCO, as the borrower, MSSF and certain lenders; and (v) that certain Continuing Covenant Agreement (the “Existing Continuing Covenant Agreement”), dated as of
August 19, 2014, by and among BPGCT, as the parent, HFOTCO, as obligor, Bank of America, N.A., as administrative agent and collateral agent, and the bondholders party thereto, as modified pursuant to that certain Consent and Amendment, dated as
of June 5, 2017 (the “CCA Amendment”; the Existing Continuing Covenant Agreement, as modified by the CCA Amendment, the “Continuing Covenant Agreement”). SemCrude Pipeline, L.L.C., a Delaware limited liability
company (“SCPL”), owns a 51% membership interest in White Cliffs, L.L.C., a Delaware limited liability company (“White Cliffs”); such membership interest has been duly authorized and validly issued in accordance
with the limited liability company agreement of White Cliffs (such agreement, as in effect on the date hereof, the “White Cliffs LLC Agreement”), is fully paid (to the extent required by the White Cliffs LLC Agreement) and
nonassessable (except as such nonassessability may be affected by Sections 18-607 and 18-804 of the Delaware LLC Act); and SCPL owns such membership interest free and
clear of all Liens, except for Liens arising under or in connection with the Credit Agreement or as described in the Disclosure Package and the Final Memorandum. Glass Mountain Holding, LLC, an Oklahoma limited liability company
(“GMH”), owns a 50% interest in Glass Mountain Pipeline, LLC, a Delaware limited liability company (“GMP”); such membership interest has been duly authorized and validly issued in accordance with the limited
liability company agreement of GMP (such agreement, as in effect on the date hereof, the “GMP LLC Agreement”), is fully paid (to the extent required by the GMP LLC Agreement) and nonassessable (except as such nonassessability may be
affected by Sections 18-607 and 18-804 of the Delaware LLC Act); and GMH owns such membership interest free and clear of all Liens, except for Liens arising under or in
connection with the Credit Agreement or as described in the Disclosure Package and the Final Memorandum. 
 (l) The
statements in the Disclosure Package and the Final Memorandum under the headings “Certain United States Federal Tax Consequences”, “Description of the Notes”, “Exchange Offer; Registration Rights”,
“Business—Regulation” and “Description of Other Indebtedness”, in each case, to the extent that they purport to summarize the provisions of the law or documents referred to therein, fairly summarize the matters therein
described. 
 (m) This Agreement has been duly authorized, executed and delivered by the Company and the Guarantors; the
Registration Rights Agreement has been duly authorized, and, on the Closing Date, will have been duly executed and delivered by the Company and the Guarantors and, assuming the due authorization, execution and delivery thereof by the other parties
thereto, will constitute a legal, valid and binding instrument enforceable against the Company and the Guarantors in accordance with its terms (subject, as to the enforcement of remedies, to applicable bankruptcy,

  
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reorganization, insolvency, fraudulent transfer, moratorium or other laws affecting creditors’ rights generally from time to time in effect and to general principles of equity and except as
rights to indemnification may be limited by applicable law); the Indenture has been duly authorized by the Company and the Guarantors and, assuming due authorization, execution and delivery thereof by the Trustee, when executed and delivered by the
Company and the Guarantors, will constitute a legal, valid and binding instrument enforceable against the Company and the Guarantors in accordance with its terms (subject, as to the enforcement of remedies, to applicable bankruptcy, reorganization,
insolvency, fraudulent transfer, moratorium or other laws affecting creditors’ rights generally from time to time in effect and to general principles of equity and except as rights to indemnification may be limited by applicable law); the Notes
have been duly authorized by the Company and, when executed and authenticated in accordance with the provisions of the Indenture and delivered to and paid for by the Initial Purchasers in accordance with the terms of this Agreement, will have been
duly executed and delivered by the Company and will constitute the legal, valid and binding obligations of the Company entitled to the benefits of the Indenture (subject, as to the enforcement of remedies, to applicable bankruptcy, reorganization,
insolvency, fraudulent transfer, moratorium or other laws affecting creditors’ rights generally from time to time in effect and to general principles of equity). 

(n) Each of the Guarantees has been duly authorized by the applicable Guarantor and, when executed by the applicable Guarantor
and delivered to the Trustee in accordance with the terms of the Indenture, will have been duly executed and delivered by such Guarantor and constitute the legal, valid and binding obligation of such Guarantor enforceable against such Guarantor in
accordance with its terms (subject, as to the enforcement of remedies, to applicable bankruptcy, reorganization, insolvency, fraudulent transfer, moratorium or other laws affecting creditors’ rights generally from time to time in effect and to
general principles of equity). 
 (o) Assuming the accuracy of the representations and warranties of the Initial Purchasers
set forth in Section 4 hereof and compliance by the Initial Purchasers of their agreements set forth herein, no consent, approval, authorization, filing with or order of any court or governmental agency or body is required in connection with
the issuance and sale of the Securities or performance by the Company and the Guarantors of their obligations under this Agreement, the Registration Rights Agreement or the Indenture, except such as have been obtained or made by the Company or the
Guarantors and except such as may be required under the Exchange Act or the blue sky laws of any jurisdiction in which the Securities are offered and sold and, in the case of the Registration Rights Agreement, such as will be obtained under the Act,
the Trust Indenture Act and applicable state securities laws. 
 (p) None of the execution and delivery of this Agreement,
the Registration Rights Agreement or the Indenture or the consummation of any of the transactions herein or therein contemplated, including the issuance and sale of the Securities as described in the Disclosure Package and the Final Memorandum, or
the fulfillment of the terms hereof or thereof will conflict with, result in a breach or violation of, or imposition of any Lien upon any property or assets of the Company or any of its subsidiaries pursuant to (i) the

  
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Organizational Documents of the Company or any of its subsidiaries; (ii) the terms of any indenture, contract, lease, mortgage, deed of trust, note agreement, loan agreement or other
agreement, obligation, or instrument to which the Company or any of its subsidiaries is a party or bound or to which its or their property is subject; or (iii) any statute, law, rule, regulation, judgment, order or decree of any court,
regulatory body, administrative agency, governmental body, arbitrator or other authority having jurisdiction over the Company or any of its subsidiaries or any of its or their properties, except, in the case of clauses (ii) and (iii) above, for
such conflicts, breaches, violations, or Liens as would not, individually or in the aggregate, have a Material Adverse Effect. 

(q) The consolidated historical financial statements and schedules of (i) the Company and its consolidated subsidiaries
and (ii) White Cliffs and its consolidated subsidiaries included or incorporated by reference in the Disclosure Package and the Final Memorandum present fairly in all material respects the financial condition, results of operations and cash
flows of (i) the Company and its consolidated subsidiaries and (ii) White Cliffs and its consolidated subsidiaries, as applicable, as of the dates and for the periods indicated, comply as to form in all material respects with the
applicable accounting requirements of Regulation S-X and have been prepared in conformity with generally accepted accounting principles in the United States applied on a consistent basis throughout the
periods indicated (except as otherwise noted therein); the summary financial data set forth under the caption “Summary Historical and Pro Forma Consolidated Financial Information” in the Disclosure Package and the Final Memorandum fairly
presents in all material respects, on the basis stated in the Disclosure Package and the Final Memorandum, the information shown thereby. The interactive data in eXtensbile Business Reporting Language included or incorporated by reference in the
Disclosure Package, the Preliminary Memorandum and the Final Memorandum fairly presents the information called for in all material respects and has been prepared in accordance with the Commission’s rules and guidelines applicable thereto. 

(r) No action, suit or proceeding by or before any court or governmental agency, authority or body or any arbitrator involving
the Company or any of its subsidiaries or its or their property is pending or, to the knowledge of the Company, threatened that (i) would reasonably be expected to have a material adverse effect on the performance of this Agreement, the
Indenture, the Registration Rights Agreement or the consummation of any of the transactions contemplated hereby or thereby or (ii) would have a Material Adverse Effect. 

(s) Each of the Company and its subsidiaries owns or leases all such properties as are necessary to the conduct of its
operations as presently conducted, except those that would not, individually or in the aggregate, have a Material Adverse Effect. 

(t) None of the Company or any of its subsidiaries is in violation of or default under (i) any provision of its
Organizational Documents; (ii) the terms of any indenture, contract, lease, mortgage, deed of trust, note agreement, loan agreement or other agreement, obligation, or instrument to which it is a party or bound or to which its property is
subject; or (iii) any statute, law, rule, regulation, judgment, order or decree applicable to the Company or any such subsidiary of any court, regulatory body, 

  
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administrative agency, governmental body, arbitrator or other authority having jurisdiction over the Company or such subsidiary or any of its properties, as applicable, except, in the case of
clauses (ii) and (iii) above, for such violations or defaults as would not, individually or in the aggregate, have a Material Adverse Effect. 

(u) (i) BDO USA, LLP, who have certified certain financial statements of the Company and its consolidated subsidiaries and
delivered their report with respect to the audited consolidated financial statements and schedules included or incorporated by reference in the Disclosure Package and the Final Memorandum, are independent public accountants with respect to the
Company in accordance with the applicable rules and regulations adopted by the Commission and the Public Company Accounting Oversight Board (United States) and as required by the Act. 

(ii) BDO USA, LLP, who have certified certain financial statements of White Cliffs and its consolidated subsidiaries and
delivered their report with respect to the audited consolidated financial statements and schedules included or incorporated by reference in the Disclosure Package and the Final Memorandum, are independent public accountants with respect to White
Cliffs in accordance with the applicable rules and regulations adopted by the Commission and the Public Company Accounting Oversight Board (United States) and as required by the Act. 

(iii) BDO USA, LLP, who have certified certain financial statements of BPGCT and its consolidated subsidiaries and delivered
their report with respect to the audited consolidated financial statements and schedules included or incorporated by reference in the Disclosure Package and the Final Memorandum, are independent public accountants with respect to BPGCT in accordance
with the applicable rules and regulations adopted by the Commission and the Public Company Accounting Oversight Board (United States) and as required by the Act. 

(iv) Grant Thornton LLP, who have reviewed certain financial statements of the Company and its consolidated subsidiaries
included or incorporated by reference in the Disclosure Package and the Final Memorandum, are independent public accountants with respect to the Company in accordance with the applicable rules and regulations adopted by the Commission and the Public
Company Accounting Oversight Board (United States) and as required by the Act. 
 (v) There are no stamp or other issuance or
transfer taxes or duties or other similar fees or charges required to be paid in connection with the execution and delivery of this Agreement or the issuance or sale of the Securities. 

(w) The Company has filed all applicable tax returns that are required to be filed through the date hereof or has requested
extensions thereof (except in any case in which the failure so to file would not have a Material Adverse Effect) and has paid all taxes required to be paid by it and any other assessment, fine or penalty levied against it, to the extent that any of
the foregoing is due and payable, except for any such assessment, fine or penalty that is currently being contested in good faith or as would not have a Material Adverse Effect. 

  
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 (x) No labor problem or dispute with the employees of the Company or any of its
subsidiaries exists or, to the knowledge of the Company, is threatened or imminent, and the Company is not aware of any existing or imminent labor disturbance by the employees of any of its or its subsidiaries’ principal suppliers, contractors
or customers, except as would not have a Material Adverse Effect. 
 (y) No subsidiary of the Company is currently
prohibited, directly or indirectly, from paying any dividends or distributions to the Company, from making any other distribution on such subsidiary’s equity interests, from repaying to the Company any loans or advances to such subsidiary from
the Company or from transferring any of such subsidiary’s property or assets to the Company or any other subsidiary of the Company, except as prohibited by the Credit Agreement, the indentures governing the outstanding debt securities of the
Company, the HFOTCO Pledge Agreement, the IKE Bond Indentures, the HFOTCO Credit Agreement, the Continuing Covenant Agreement, such subsidiary’s Organizational Agreements and the laws of such subsidiary’s state of formation or
incorporation, as the case may be, or as described in or contemplated in the Disclosure Package or the Final Memorandum (in each case, exclusive of any amendment or supplement thereto). 

(z) The Company and each of its subsidiaries are insured by insurers of recognized financial responsibility against such losses
and risks and in such amounts as are prudent and customary in the businesses in which they are engaged; all policies of insurance and any fidelity or surety bonds insuring the Company or any of its subsidiaries or their respective businesses,
assets, employees, officers and directors are in full force and effect; the Company and its subsidiaries are in compliance with the terms of such policies and instruments in all material respects; there are no material claims by the Company or any
of its subsidiaries under any such policy or instrument as to which any insurance company is denying liability or defending under a reservation of rights clause; neither the Company nor any of its subsidiaries has been refused any insurance coverage
sought or applied for; and neither the Company nor any of its subsidiaries has any reason to believe that it will not be able to renew its existing insurance coverage as and when such coverage expires or to obtain similar coverage from similar
insurers as may be necessary to continue its business at a cost that would not have a Material Adverse Effect. 
 (aa) The
Company and its subsidiaries possess all licenses, certificates, permits and other authorizations issued by all applicable authorities necessary to conduct their respective businesses in the manner described in the Disclosure Package and the Final
Memorandum, except where the failure to possess the same would not, individually or in the aggregate, have a Material Adverse Effect; and neither the Company nor any of its subsidiaries has received any notice of proceedings relating to the
revocation or modification of any such certificate, authorization or permit which, individually or in the aggregate, if the subject of an unfavorable decision, ruling or finding, would have a Material Adverse Effect. 

  
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 (bb) The Company and each of its subsidiaries (other than Holdings and its
subsidiaries) and, to the knowledge of the Company after due inquiry, Holdings and each of its subsidiaries maintain a system of internal accounting controls sufficient to provide reasonable assurance that (i) transactions are executed in
accordance with management’s general or specific authorizations; (ii) transactions are recorded as necessary to permit preparation of financial statements in conformity with generally accepted accounting principles in the United States and
to maintain asset accountability; (iii) access to assets is permitted only in accordance with management’s general or specific authorization; (iv) the recorded accountability for assets is compared with the existing assets at
reasonable intervals and appropriate action is taken with respect to any differences; and (v) the interactive data in eXtensbile Business Reporting Language included or incorporated by reference in the Disclosure Package, Preliminary Memorandum
or Final Memorandum are prepared in accordance with the Commission’s rules and guidelines applicable thereto. The internal controls over financial reporting of the Company and its subsidiaries (other than Holdings and its subsidiaries) are
effective and the Company and its subsidiaries are not aware of any material weakness in such internal controls over financial reporting. 

(cc) The Company and its subsidiaries have established and maintain “disclosure controls and procedures” (as such
term is defined in Rule 13a-15(e) under the Exchange Act); such disclosure controls and procedures are effective to perform the functions for which they were established. 

(dd) The Company and its subsidiaries and their respective facilities (i) are and have at all times in the past been in
compliance with any and all applicable Environmental Laws (as defined below); (ii) have received and are in compliance with all permits, licenses, registrations or other approvals, including for the construction of all pipelines and facilities,
required of them under applicable Environmental Laws to conduct their respective businesses; and (iii) have not received notice of any actual or potential liability under any Environmental Law, except where such
non-compliance with Environmental Laws, failure to receive required permits, licenses, registrations or other approvals, or liability would not, individually or in the aggregate, have a Material Adverse
Effect. 
 (ee) There has been no Release (as defined below) or threatened Release of Regulated Materials (as defined below)
at, to or from any property, pipeline or facility, currently or, to the knowledge of the Company, formerly owned, operated or leased by the Company or any of its subsidiaries, which would reasonably be expected to give rise to liability under
Environmental Laws, except where such liability under Environmental Laws would not, individually or in the aggregate, have a Material Adverse Effect. Neither the Company nor any of its subsidiaries has been named as a “potentially responsible
party” under the Comprehensive Environmental Response, Compensation, and Liability Act of 1980, as amended, except where any such naming would not, individually or in aggregate, have a Material Adverse Effect.. 

  
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 (ff) In the ordinary course of its business, the Company periodically reviews the
effect of Environmental Laws on the business, operations and properties of the Company and its subsidiaries, in the course of which it identifies and evaluates associated costs and liabilities (including, without limitation, any capital or operating
expenditures required for investigation or clean-up, closure of properties or compliance with Environmental Laws, or any permit, license or approval, any related constraints on operating activities and any
potential liabilities to third parties); on the basis of such review, the Company has reasonably concluded that such associated costs and liabilities would not, individually or in the aggregate, have a Material Adverse Effect. 

For purposes of this Agreement, “Environment” means ambient air, indoor air, surface water, groundwater,
drinking water, soil, surface and subsurface strata, and natural resources such as wetlands, flora and fauna. “Environmental Laws” means the common law and all federal, state, local and foreign laws or regulations, ordinances,
codes, orders, decrees, judgments and injunctions issued, promulgated or entered thereunder, relating to pollution or protection of the Environment, to human health and to the distribution and production of energy, including without limitation,
those relating to (i) the Release or threatened Release of Regulated Materials; (ii) the manufacture, processing, gathering, distribution, use, generation, treatment, storage, transport, handling or recycling of Regulated Materials; and
(iii) pipeline safety. “Regulated Materials” means any substance, material, pollutant or contaminant, chemical, waste, compound, or constituent, in any form regulated under or which can give rise to liability under any
Environmental Law, including without limitation, petroleum and petroleum products, natural gas and natural gas liquids, asbestos and asbestos and asbestos containing materials. “Release” means any release, spill, emission,
discharge, deposit, disposal, leaking, pumping, pouring, dumping, emptying, injection or leaching into or migration through the Environment, or into, from or through any building, pipeline, structure or facility. 

(gg) The subsidiaries listed on Annex A attached hereto are the only “significant
subsidiaries” of the Company (as defined in Rule 1-02 of Regulation S-X and determined on a pro forma basis after giving effect to the acquisition of
BPGCT). 
 (hh) (i) Each employee benefit plan, within the meaning of Section 3(3) of the Employee Retirement
Income Security Act of 1974, as amended (“ERISA”), for which the Company or any member of its “Controlled Group” (defined as any organization which is a member of a controlled group of corporations within the meaning of
Section 414 of the Code) would have any liability (each, a “Plan”) has been maintained in material compliance with its terms and the requirements of any applicable statutes, orders, rules and regulations, including but not
limited to ERISA and the Code; (ii) no prohibited transaction, within the meaning of Section 406 of ERISA or Section 4975 of the Code, has occurred with respect to any Plan, excluding transactions effected pursuant to a statutory or
administrative exemption; (iii) with respect to each Plan that is subject to the funding rules of Section 412 of the Code or Section 302 of ERISA, no failure to satisfy the minimum funding standards under Section 412 of the Code
or Section 302 of ERISA, whether or not waived, has occurred or is reasonably expected to occur; (iv) for each Plan that is subject to the funding rules of ERISA or the Code, the fair market value of the assets of each such Plan is not
less than the present value of all benefits accrued under such Plan (determined based on those assumptions used to fund such Plan); (v) no 

  
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Plan is, or is reasonably expected to be, in “at risk status” (within the meaning of Section 303(i) of ERISA) or “endangered status” or “critical status”
(within the meaning of Section 305 of ERISA); (vi) no “reportable event” (within the meaning of Section 4043(c) of ERISA) has occurred or is reasonably expected to occur; (vii) each Plan that is intended to be qualified
under Section 401(a) of the Code is so qualified and nothing has occurred, to the knowledge of the Company or any member of its Controlled Group, whether by action or by failure to act, which would cause the loss of such qualification and
(viii) neither the Company nor any member of the Controlled Group has incurred, nor reasonably expects to incur, any liability under Title IV of ERISA (other than contributions to the Plan or premiums to the Pension Benefit Guaranty
Corporation, in the ordinary course and without default) in respect of Plan (including a “multiemployer plan”, within the meaning of Section 4001(a)(3) of ERISA), except, in each case with respect to the events or conditions set forth
in clauses (i) through (viii) above, as would not have a Material Adverse Effect. 
 (ii) The operations of the Company
and its subsidiaries are and have been conducted at all times in compliance with all applicable financial recordkeeping and reporting requirements, including those of the Bank Secrecy Act, as amended by Title III of the Uniting and Strengthening
America by Providing Appropriate Tools Required to Intercept and Obstruct Terrorism Act of 2001 (USA PATRIOT Act) (the “USA Patriot Act”), and the applicable anti-money laundering statutes of jurisdictions where the Company and its
subsidiaries conduct business, the rules and regulations thereunder and any related or similar rules, regulations or guidelines, issued, administered or enforced by any governmental agency (collectively, the “Anti-Money Laundering
Laws”) and no action, suit or proceeding by or before any court or governmental agency, authority or body or any arbitrator involving the Company or any of its subsidiaries with respect to the Anti-Money Laundering Laws is pending or, to
the best knowledge of the Company, threatened. 
 (iii) Neither the Company nor any of its subsidiaries, nor any director,
officer, or employee thereof, nor, to the knowledge of the Company, any agent, Affiliate or representative of the Company or any of its subsidiaries (i) is currently subject to any sanctions administered or enforced by the United States
(including any administered or enforced by the Office of Foreign Assets Control of the U.S. Treasury Department (“OFAC”)), the United Nations Security Council, the European Union, the United Kingdom (including sanctions administered
or controlled by Her Majesty’s Treasury), the Swiss Secretariat of Economic Affairs, the Hong Kong Monetary Authority, the Monetary Authority of Singapore or other relevant sanctions authority or (ii) will, directly or indirectly, use the
proceeds of this offering, or lend, contribute or otherwise make available such proceeds to any subsidiary, joint venture partner or other individual or entity (a “Person”) (A) to fund or facilitate any activities or business of or
with any Person or in any country or territory that, at the time of such funding or facilitation, is the subject of any economic sanctions administered or enforced by the United States (including any administered or enforced by OFAC, the U.S.
Department of State, or the Bureau of Industry and Security of the U.S. Department of Commerce), the United Nations Security Council, the European Union, the United Kingdom (including sanctions administered or controlled by Her Majesty’s
Treasury), the Swiss Secretariat of 

  
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Economic Affairs, the Hong Kong Monetary Authority, the Monetary Authority of Singapore or other relevant sanctions authority (collectively, “Sanctions” and such persons,
“Sanctioned Persons”) or (B) in any other manner that will result in a violation of Sanctions, or could result in the violation of Sanctions, by any Person (including any Person participating in the offering of the Securities,
whether as Initial Purchaser, advisor, investor or otherwise). 
 (ii) Neither the Company nor any of its subsidiaries, nor
any director, officer, or employee thereof, nor, to the knowledge of the Company, any agent, Affiliate or representative of the Company or any of its subsidiaries, is a Person that is, or is 50% or more owned or otherwise controlled by a Person that
is: (i) the subject of any Sanctions; or (ii) located, organized or resident in a country or territory that is, or whose government is, the subject of Sanctions that broadly prohibit dealings with that country or territory (currently,
Crimea, Cuba, Iran, North Korea, Sudan and Syria) (collectively, “Sanctioned Countries” and each, a “Sanctioned Country”). 

(jj) Neither the Company nor any of its subsidiaries has engaged in any dealings or transactions with or for the benefit of a
Sanctioned Person, or with or in a Sanctioned Country, in the preceding 3 years, nor does the Company or any of its subsidiaries have any plans to increase its dealings or transactions with Sanctioned Persons, or with or in Sanctioned Countries.

 (kk) There is and has been no failure on the part of the Company or, to the knowledge of the Company, any of the
Company’s directors or officers, in their capacities as such, to comply in all material respects with any applicable provision of the Sarbanes-Oxley Act of 2002 and the rules and regulations promulgated in connection therewith (the
“Sarbanes-Oxley Act”), including Section 402 relating to loans and Sections 302 and 906 relating to certifications. 

(ll) Neither the Company nor any of its subsidiaries, nor, to the knowledge of the Company, any Affiliate, director, officer or
employee agent or representative of the Company or of any of its subsidiaries or Affiliates, has taken or will take any action, directly or indirectly, that would result in a violation by such persons of the Foreign Corrupt Practices Act of 1977, as
amended, and the rules and regulations thereunder (the “FCPA”), the Bribery Act of 2010 of the United Kingdom (the “UK Act”) or similar law of any applicable jurisdiction, including, without limitation, making use
of the mails or any means or instrumentality of interstate commerce corruptly in furtherance of an offer, payment, promise to pay or authorization or approval of the payment or giving of any money, or other property, gift, promise to give, or
authorization of the giving of anything of value to any “government official” (including any officer or employee of a government or government-owned or controlled entity or of a public international organization, or any person acting in an
official capacity for or on behalf of any of the foregoing, or any political party or party official or candidate for political office) in contravention of the FCPA; and the Company, its subsidiaries and, to the knowledge of the Company, its
Affiliates have conducted their businesses in compliance with the FCPA, the UK Act or any other similar anti-corruption law of any applicable jurisdiction and have instituted and maintain and will continue to maintain policies and procedures
designed to promote and ensure, and which are reasonably expected to continue to promote and ensure, continued compliance therewith and with the representation and warranty contained herein. 

  
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 (mm) Any certificate signed by any officer of the Company and delivered to the
Representative or counsel for the Initial Purchasers in connection with the offering of the Securities shall be deemed a representation and warranty by the Company, as to matters covered thereby, to each Initial Purchaser. 

(nn) The documents incorporated by reference in the Disclosure Package, the Preliminary Memorandum and the Final Memorandum
conformed, and any further documents so incorporated will conform, when filed with the Commission, in all material respects to the requirements of the Exchange Act. 

2. Purchase and Sale. Subject to the terms and conditions and in reliance upon the representations and warranties herein set forth, the
Company and the Guarantors agree to sell to each Initial Purchaser, and each Initial Purchaser agrees, severally and not jointly, to purchase from the Company and the Guarantors, at a purchase price of 97.2655% of the principal amount thereof, plus
accrued interest, if any, from September 20, 2017 to the Closing Date, the principal amount of Securities set forth opposite such Initial Purchaser’s name in Schedule I hereto. 

3. Delivery and Payment. Delivery of and payment for the Securities shall be made at 10:00 A.M., New York City time, on
September 20, 2017, which date and time may be postponed by not more than three Business Days by agreement between the Representative and the Company or as provided in Section 9 hereof (such date and time of delivery and payment for the
Securities being herein called the “Closing Date”). Delivery of the Securities shall be made to the Representative for the respective accounts of the several Initial Purchasers against payment by the several Initial Purchasers
through the Representative of the purchase price thereof to or upon the order of the Company by wire transfer of immediately available funds to the account specified by the Company. Delivery of the Securities shall be made through the facilities of
The Depository Trust Company unless the Representative shall otherwise instruct. 
 4. Offering by Initial Purchasers. (a) The
Initial Purchasers propose to make an offering of the Securities at the price and upon the terms set forth in the Disclosure Package and the Final Memorandum as soon as practicable after this Agreement is entered into and as in the judgment of the
Initial Purchasers is advisable. Each Initial Purchaser acknowledges that the Securities have not been and will not be registered under the Act and may not be offered or sold within the United States or to, or for the account or benefit of, U.S.
persons, except pursuant to an exemption from, or in a transaction not subject to, the registration requirements of the Act. 
 (b) Each
Initial Purchaser, severally and not jointly, represents and warrants to and agrees with the Company that: 

  
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 (i) it has not offered or sold, and will not offer or sell, any Securities within
the United States or to, or for the account or benefit of, U.S. persons (x) as part of their distribution at any time or (y) otherwise until 40 days after the later of the commencement of the offering and the date of the closing of the
offering except: 
  

	 	(A)	to those it reasonably believes to be “qualified institutional buyers” (as defined in Rule 144A under the Act), or 

  

	 	(B)	in accordance with Rule 903 of Regulation S; 

 (ii) neither it nor any
person acting on its behalf has made or will make offers or sales of the Securities in the United States by means of any form of general solicitation or general advertising (within the meaning of Rule 502 of Regulation D) in the United States
or in any manner involving a public offering within the meaning of Section 4(a)(2) of the Act; 
 (iii) in connection
with each sale pursuant to Section 4(b)(i)(A), it has taken or will take reasonable steps to ensure that the purchaser of such Securities is aware that such sale may be made in reliance on Rule 144A; 

(iv) neither it, nor any of its Affiliates nor any person acting on its or their behalf has engaged or will engage in any
directed selling efforts (within the meaning of Regulation S) with respect to the Securities; 
 (v) it is an
“accredited investor” (as defined in Rule 501(a) of Regulation D); 
 (vi) it has complied and will comply with the
offering restrictions requirement of Regulation S; 
 (vii) at or prior to the confirmation of sale of Securities (other
than a sale of Securities pursuant to Section 4(b)(i)(A) of this Agreement), it shall have sent to each distributor, dealer or person receiving a selling concession, fee or other remuneration that purchases Securities from it during the
distribution compliance period (within the meaning of Regulation S) a confirmation or notice to substantially the following effect: 

“The Securities covered hereby have not been registered under the U.S. Securities Act of 1933 (the “Act”) and may not be
offered or sold within the United States or to, or for the account or benefit of, U.S. persons (i) as part of their distribution at any time or (ii) otherwise until 40 days after the later of the commencement of the offering and the date
of closing of the offering, except in either case in accordance with Regulation S or Rule 144A under the Act. Terms used in this paragraph have the meanings given to them by Regulation S.” 

5. Agreements. The Company agrees with each Initial Purchaser that: 

(a) The Company will furnish to each Initial Purchaser and to counsel for the Initial Purchasers, without charge, until the
completion of the sale of the Securities by the Initial Purchasers, as many copies of the materials contained in the Disclosure Package and the Final Memorandum and any amendments and supplements thereto as they may reasonably request. 

  
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 (b) The Company will prepare a Final Term Sheet, containing solely a description
of final terms of the Securities and the offering thereof, in the form approved by the Representative and attached as Schedule II hereto. 

(c) Until the later of (i) the completion of the sale of the Securities by the Initial Purchasers and (ii) the
Closing Date, the Company will not amend or supplement the Disclosure Package or the Final Memorandum, without the prior written consent of the Representative. 

(d) If at any time prior to the completion of the sale of the Securities by the Initial Purchasers (as determined by the
Representative), any event occurs as a result of which the Disclosure Package or the Final Memorandum, as then amended or supplemented, would include any untrue statement of a material fact or omit to state any material fact necessary in order to
make the statements therein, in the light of the circumstances under which they were made, not misleading, or if it should be necessary to amend or supplement the Disclosure Package or the Final Memorandum to comply with applicable law, the Company
will promptly (i) notify the Representative of any such event; (ii) subject to the requirements of Section 5(c), prepare an amendment or supplement that will correct such statement or omission or effect such compliance; and
(iii) supply any supplemented or amended Disclosure Package or Final Memorandum to the several Initial Purchasers and counsel for the Initial Purchasers without charge in such quantities as they may reasonably request. 

(e) Without the prior written consent of the Representative, the Company has not given and will not give to any prospective
purchaser of the Securities any written information concerning the offering of the Securities other than materials contained in the Disclosure Package, the Final Memorandum or any other offering materials prepared by or with the prior written
consent of the Representative. 
 (f) The Company will cooperate with the Initial Purchasers in arranging, if necessary, for
the qualification of the Securities for sale by the Initial Purchasers under the laws of such jurisdictions as the Representative may designate and will maintain such qualifications in effect so long as required for the sale of the Securities;
provided that in no event shall the Company be obligated to qualify to do business in any jurisdiction where it is not now so qualified or to take any action that would subject it to service of process in suits in any jurisdiction where it is
not now so subject. The Company will promptly advise the Representative of the receipt by the Company of any notification with respect to the suspension of the qualification of the Securities for sale in any jurisdiction or the initiation or
threatening of any proceeding for such purpose. 
 (g) Prior to the one year anniversary of the Closing Date, the Company
will not, and will not permit any of its Affiliates to, resell any Securities that constitute “restricted securities” under Rule 144 under the Act that have been reacquired by any of them. 

  
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 (h) None of the Company, its Affiliates, or any person acting on its or their
behalf will, directly or indirectly, make offers or sales of any “security” (as defined in the Act), or solicit offers to buy any security, that could be integrated with the sale of the Securities in a manner which would require the
registration of the Securities under the Act. 
 (i) None of the Company, its Affiliates, or any person acting on its or
their behalf will engage in any directed selling efforts (within the meaning of Regulation S) with respect to the Securities; and each of them will comply with the offering restrictions requirement of Regulation S. 

(j) None of the Company, its Affiliates, or any person acting on its or their behalf will engage in any form of general
solicitation or general advertising (within the meaning of Rule 502 of Regulation D) in connection with any offer or sale of the Securities in the United States. 

(k) For so long as any of the Securities are outstanding and are “restricted securities” within the meaning of Rule
144(a)(3) under the Act, the Company, during any period in which it is not subject to and in compliance with Section 13 or 15(d) of the Exchange Act or it is not exempt from such reporting requirements pursuant to and in compliance with
Rule 12g3-2(b) under the Exchange Act, will provide to each holder of such restricted securities and to each prospective purchaser (as designated by such holder) of such restricted securities, upon the request
of such holder or prospective purchaser, any information required to be provided pursuant to Rule 144A(d)(4) under the Act. This covenant is intended to be for the benefit of the holders, and the prospective purchasers designated by such holders,
from time to time of such restricted securities. 
 (l) The Company will cooperate with the Representative and use its best
efforts to permit the Securities to be eligible for clearance and settlement through The Depository Trust Company. 
 (m)
Each of the Securities will bear, to the extent applicable, the legend contained in “Transfer Restrictions” in the Preliminary Memorandum and the Final Offering Circular for the time period and upon the other terms stated therein. 

(n) The Company and its subsidiaries will not for a period of 45 days following the Execution Time, without the prior written
consent of Credit Suisse, offer, sell or contract to sell, or otherwise dispose of, directly or indirectly, or announce the offering of, any debt securities issued or guaranteed by the Company or any of its subsidiaries (other than the Securities
and other than as required by (i) the Registration Rights Agreement as contemplated herein and (ii) that certain Registration Rights Agreement dated as of March 15, 2017 relating to the existing 6.375% Senior Notes due 2025 of the
Company). 
 (o) The Company will not take, directly or indirectly, any action designed to, or that has constituted or that
might reasonably be expected to, cause or result, under the Exchange Act or otherwise, in stabilization or manipulation of the price of any security of the Company to facilitate the sale or resale of the Securities. 

  
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 (p) The Company will, for a period of twelve months following the Execution Time,
furnish to the Representative all reports or other communications (financial or other) generally made available to its shareholders and deliver such reports and communications to the Representative as soon as they are available, unless such
documents are furnished to or filed with the Commission or any securities exchange on which any class of securities of the Company is listed and generally made available to the public. 

(q) The Company agrees to pay the costs and expenses relating to the following matters: (i) the preparation of the
Indenture and the Registration Rights Agreement, the issuance of the Securities and the fees of the Trustee; (ii) the preparation, printing or reproduction of the materials contained in the Disclosure Package and the Final Memorandum and each
amendment or supplement to either of them; (iii) the printing (or reproduction) and delivery (including postage, air freight charges and charges for counting and packaging) of such copies of the materials contained in the Disclosure Package and
the Final Memorandum, and all amendments or supplements to either of them, as may, in each case, be reasonably requested for use in connection with the offering and sale of the Securities; (iv) the authentication, issuance and delivery of the
Securities; (v) any stamp or transfer taxes in connection with the original issuance and sale of the Securities; (vi) the printing (or reproduction) and delivery of this Agreement, any blue sky memorandum and all other agreements or
documents printed (or reproduced) and delivered in connection with the offering of the Securities; (vii) any registration or qualification of the Securities for offer and sale under the securities or blue sky laws of the several states and any
other jurisdictions specified pursuant to Section 5(f) (including filing fees and the reasonable fees and expenses of counsel for the Initial Purchasers relating to such registration and qualification); (vii) the transportation and other
expenses incurred by or on behalf of the Company’s representatives in connection with presentations to prospective purchasers of the Securities, including, without limitation, the cost of any private jet air travel incurred in connection with
such presentations; (viii) the fees and expenses of the Company’s accountants and the fees and expenses of counsel (including local and special counsel) for the Company; and (ix) all other costs and expenses incident to the
performance by the Company of their obligations hereunder. Except as provided in this Section 5(q) and Sections 7 and 8 hereof, the Initial Purchasers shall pay their own expenses, including the fees and disbursements of their counsel. 

6. Conditions to the Obligations of the Initial Purchasers. The obligations of the Initial Purchasers to purchase the Securities shall
be subject to the accuracy of the representations and warranties of the Company contained herein at the Execution Time and the Closing Date, to the accuracy of the statements of the Company made in any certificates pursuant to the provisions hereof,
to the performance by the Company of its obligations hereunder and to the satisfaction or waiver of the following additional conditions on or prior to the Closing Date: 

(a) The Company shall have requested and caused (i) Conner & Winters, LLP, counsel for the Company and the
Guarantors, to furnish its usual and customary opinion and negative assurance letter and (ii) Gibson Dunn Crutcher, LLP, special counsel for the Company and the Guarantors, to furnish its usual and customary opinion, each dated the Closing Date
and addressed and reasonably satisfactory to the Representative, the forms of which are attached hereto as Exhibit A-1 and A-2, respectively. 

  
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 (b) In rendering such opinion, such counsel may rely (A) as to matters
involving the application of laws of any jurisdiction other than the jurisdiction of incorporation of the Company, the State of New York or the federal laws of the United States, to the extent they deem proper and specified in such opinion, upon the
opinion of other counsel of good standing whom they believe to be reliable and who are satisfactory to counsel for the Initial Purchasers and (B) as to matters of fact, to the extent they deem proper, on certificates of responsible officers of
the Company and public officials. References to the Disclosure Package, the Preliminary Memorandum and the Final Memorandum in this Section 6(b) include any amendment or supplement thereto at the Closing Date. 

(c) The Representative shall have received from Cahill Gordon & Reindel LLP, counsel for the Initial Purchasers, such
opinion or opinions, dated the Closing Date and addressed to the Representative, with respect to the issuance and sale of the Securities, the Indenture, the Registration Rights Agreement, the Disclosure Package, the Final Memorandum (as amended or
supplemented at the Closing Date) and other related matters as the Representative may reasonably require, and the Company shall have furnished to such counsel such documents as they request for the purpose of enabling them to pass upon such matters.

 (d) The Company shall have furnished to the Representative a certificate of the Company, signed by (x) the Chairman
of the Board or the President and (y) the principal financial or accounting officer of the Company, dated the Closing Date, to the effect that the signers of such certificate have carefully examined the Disclosure Package and the Final
Memorandum and any supplements or amendments thereto, and this Agreement and that: 
 (i) the representations and warranties
of the Company in this Agreement are true and correct on and as of the Closing Date with the same effect as if made on the Closing Date, and the Company has complied with all the agreements and satisfied all the conditions on its part to be
performed or satisfied hereunder at or prior to the Closing Date; and 
 (ii) since the date of the most recent audited
financial statements included or incorporated by reference in the Disclosure Package and the Final Memorandum (exclusive of any amendment or supplement thereto), there has not occurred any Material Adverse Effect. 

(e) At the Execution Time and at the Closing Date, the Initial Purchasers shall have received from the Chief Financial Officer
of the Company a certificate with respect to certain financial data included or incorporated by reference in the Disclosure Package, providing “management comfort” with respect to such data. 

  
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 (f) At the Execution Time and at the Closing Date, the Company shall have
requested and caused (i) BDO USA, LLP to furnish to the Representative a “comfort letter,” dated as of the Execution Time, and a “bring down comfort letter,” dated as of the Closing Date, with respect to the Company, White
Cliffs and BPGCT, as applicable, and (ii) Grant Thornton LLP to furnish to the Representative a “comfort letter,” dated as of the Execution Time, and a “bring down comfort letter,” dated as of the Closing Date, with respect
to the Company, in each case, in form and substance satisfactory to the Representative, confirming that they are independent accountants within the meaning of the Exchange Act and the applicable published rules and regulations thereunder and
confirming certain matters with respect to the audited and unaudited financial statements and other financial and accounting information included or incorporated by reference in the Disclosure Package and the Final Memorandum, including any
amendment or supplement thereto as of the date of the applicable letter. 
 (g) Subsequent to the Execution Time and on or
prior to the Closing Date, there shall not have occurred a Material Adverse Effect, except as set forth in or contemplated in the Disclosure Package and the Final Memorandum (exclusive of any amendment or supplement thereto), the effect of which is,
in the sole judgment of the Representative, to make it impractical or inadvisable to proceed with the offering or delivery of the Securities as contemplated in the Disclosure Package and the Final Memorandum (exclusive of any amendment or supplement
thereto). 
 (h) The Securities shall be eligible for clearance and settlement through The Depository Trust Company. 

(i) Subsequent to the Execution Time, there shall not have been any decrease in the rating of any of the Company’s debt
securities by any “nationally recognized statistical rating organization” (as defined for purposes of Rule 3(a)(62) of the Exchange Act) or any notice given of any intended or potential decrease in any such rating or of a possible
change in any such rating that does not indicate the direction of the possible change. 
 (j) Prior to the Closing Date, the
Company shall have furnished to the Representative such further information, certificates and documents as the Representative may reasonably request. 

If any of the conditions specified in this Section 6 shall not have been fulfilled when and as provided in this Agreement, or if any of
the opinions and certificates mentioned above or elsewhere in this Agreement shall not be reasonably satisfactory in form and substance to the Representative and counsel for the Initial Purchasers, this Agreement and all obligations of the Initial
Purchasers hereunder may be cancelled at, or at any time prior to, the Closing Date by the Representative. Notice of such cancellation shall be given to the Company in writing or by telephone or facsimile confirmed in writing. 

  
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 The documents required to be delivered by this Section 6 will be delivered at the office of
counsel for the Initial Purchasers, at 80 Pine Street, New York, New York 10005, on the Closing Date. 
 7. Reimbursement of Expenses.
If the sale of the Securities provided for herein is not consummated because any condition to the obligations of the Initial Purchasers set forth in Section 6 hereof is not satisfied, because of any termination pursuant to Section 10
hereof or because of any refusal, inability or failure on the part of the Company to perform any agreement herein or comply with any provision hereof other than by reason of a default by any of the Initial Purchasers, the Company will reimburse the
Initial Purchasers severally through Credit Suisse on demand for all reasonable out-of-pocket expenses (including reasonable fees and disbursements of counsel) that
shall have been incurred by them in connection with the proposed purchase and sale of the Securities. 
 8. Indemnification and
Contribution. (a) The Company agrees to indemnify and hold harmless each Initial Purchaser, the directors, officers, employees, Affiliates and agents of each Initial Purchaser and each person who controls any Initial Purchaser within the
meaning of either the Act or the Exchange Act against any and all losses, claims, damages or liabilities, joint or several, to which they or any of them may become subject under the Act, the Exchange Act or other U.S. federal or state statutory law
or regulation, at common law or otherwise, insofar as such losses, claims, damages or liabilities or actions in respect thereof arise out of or are based upon any untrue statement or alleged untrue statement of a material fact contained in the
Preliminary Memorandum, the Final Memorandum, any electronic roadshow or any Issuer Written Information, or in any amendment or supplement thereto, or arise out of or are based upon the omission or alleged omission to state therein a material fact
required to be stated therein or necessary to make the statements therein, in the light of the circumstances under which they were made, not misleading, and agrees to reimburse each such indemnified party, as incurred, for any legal or other
expenses reasonably incurred by it in connection with investigating or defending any such loss, claim, damage, liability or action; provided, however, that the Company will not be liable in any such case to the extent that any such
loss, claim, damage or liability arises out of or is based upon any such untrue statement or alleged untrue statement or omission or alleged omission made in the Preliminary Memorandum, the Final Memorandum, any electronic roadshow or any Issuer
Written Information, or in any amendment thereof or supplement thereto, in reliance upon and in conformity with written information furnished to the Company by or on behalf of any Initial Purchaser through the Representative specifically for
inclusion therein. This indemnity agreement will be in addition to any liability that the Company may otherwise have. 
 (b) Each Initial
Purchaser severally, and not jointly, agrees to indemnify and hold harmless the Company, each of its directors, each of its officers, and each person who controls the Company within the meaning of either the Act or the Exchange Act, to the same
extent as the foregoing indemnity to each Initial Purchaser, but only with reference to written information relating to such Initial Purchaser furnished to the Company by or on behalf of such Initial Purchaser through the Representative specifically
for inclusion in the Preliminary Memorandum or the Final Memorandum (or in any amendment or supplement thereto), and will reimburse the Company and such other persons for all
out-of-pocket expenses reasonably incurred by the Company or such other persons in connection with investigating or defending

  
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any such action or claim as such expenses are incurred. This indemnity agreement will be in addition to any liability that any Initial Purchaser may otherwise have. The Company acknowledges that
the statements set forth in the eighth and ninth paragraphs under the heading “Plan of Distribution” in the Preliminary Memorandum and the Final Memorandum constitute the only written information furnished to the Company by or on behalf of
any Initial Purchaser for inclusion in the Preliminary Memorandum or the Final Memorandum or in any amendment or supplement thereto. 
 (c)
Promptly after receipt by an indemnified party under this Section 8 of notice of the commencement of any action, such indemnified party will, if a claim in respect thereof is to be made against the indemnifying party under this Section 8,
notify the indemnifying party in writing of the commencement thereof; but the failure so to notify the indemnifying party (i) will not relieve it from liability under paragraph (a) or (b) above unless and to the extent it did not
otherwise learn of such action and such failure results in the forfeiture by the indemnifying party of substantial rights and defenses and (ii) will not, in any event, relieve the indemnifying party from any obligations to any indemnified party
other than the indemnification obligation provided in paragraph (a) or (b) above. The indemnifying party shall be entitled to appoint counsel (including local counsel) of the indemnifying party’s choice at the indemnifying
party’s expense to represent the indemnified party in any action for which indemnification is sought (in which case the indemnifying party shall not thereafter be responsible for the fees and expenses of any separate counsel, other than local
counsel if not appointed by the indemnifying party, retained by the indemnified party or parties except as set forth below); provided, however, that such counsel shall be satisfactory to the indemnified party. Notwithstanding the
indemnifying party’s election to appoint counsel (including local counsel) to represent the indemnified party in an action, the indemnified party shall have the right to employ separate counsel (including local counsel), and the indemnifying
party shall bear the reasonable fees, costs and expenses of such separate counsel if (i) the use of counsel chosen by the indemnifying party to represent the indemnified party would present such counsel with a conflict of interest;
(ii) the actual or potential defendants in, or targets of, any such action include both the indemnified party and the indemnifying party and the indemnified party shall have reasonably concluded that there may be legal defenses available to it
and/or other indemnified parties that are different from or additional to those available to the indemnifying party; (iii) the indemnifying party shall not have employed counsel satisfactory to the indemnified party to represent the indemnified
party within a reasonable time after notice of the institution of such action; or (iv) the indemnifying party shall authorize the indemnified party to employ separate counsel at the expense of the indemnifying party. An indemnifying party will
not, without the prior written consent of the indemnified parties, settle or compromise or consent to the entry of any judgment with respect to any pending or threatened claim, action, suit or proceeding in respect of which indemnification or
contribution may be sought hereunder (whether or not the indemnified parties are actual or potential parties to such claim or action) unless such settlement, compromise or consent includes an unconditional release of each indemnified party from all
liability arising out of such claim, action, suit or proceeding and does not include an admission of fault, culpability or failure to act by or on behalf of such indemnified party. An indemnifying party shall not be liable under this Section 8
to any indemnified party regarding any settlement or compromise or consent to the entry of any judgment with respect to any pending or threatened claim, action, suit or proceeding in respect of which indemnification or contribution may be sought
hereunder (whether or not the indemnified parties are actual or potential parties to such 

  
 -22- 

 
claim or action) unless such settlement, compromise or consent is consented to by such indemnifying party, which consent shall not be unreasonably withheld, but if settled with such consent or if
there is a final judgment for the plaintiff, such indemnifying party agrees to indemnify the indemnified party in accordance with this Section 8. 

(d) In the event that the indemnity provided in paragraph (a) or (b) of this Section 8 is unavailable to or insufficient to hold
harmless an indemnified party for any reason, the Company and the Initial Purchasers severally agree to contribute to the aggregate losses, claims, damages and liabilities (including legal or other expenses reasonably incurred in connection with
investigating or defending any loss, claim, damage, liability or action) (collectively “Losses”) to which the Company and one or more of the Initial Purchasers may be subject in such proportion as is appropriate to reflect the
relative benefits received by the Company on the one hand and by the Initial Purchasers on the other from the offering of the Securities; provided, however, that in no case shall any Initial Purchaser be responsible for any amount in
excess of the purchase discount or commission applicable to the Securities purchased by such Initial Purchaser hereunder. If the allocation provided by the immediately preceding sentence is unavailable for any reason, the Company and the Initial
Purchasers severally shall contribute in such proportion as is appropriate to reflect not only such relative benefits but also the relative fault of the Company on the one hand and the Initial Purchasers on the other in connection with the
statements or omissions that resulted in such Losses, as well as any other relevant equitable considerations. Benefits received by the Company shall be deemed to be equal to the total net proceeds from the offering (before deducting expenses)
received by it, and benefits received by the Initial Purchasers shall be deemed to be equal to the total purchase discounts and commissions. Relative fault shall be determined by reference to, among other things, whether any untrue or alleged untrue
statement of a material fact or the omission or alleged omission to state a material fact relates to information provided by the Company on the one hand or the Initial Purchasers on the other, the intent of the parties and their relative knowledge,
access to information and opportunity to correct or prevent such untrue statement or omission. The Company and the Initial Purchasers agree that it would not be just and equitable if contribution were determined by pro rata allocation or any other
method of allocation that does not take account of the equitable considerations referred to above. Notwithstanding the provisions of this paragraph (d), no person guilty of fraudulent misrepresentation (within the meaning of Section 11(f)
of the Act) shall be entitled to contribution from any person who was not guilty of such fraudulent misrepresentation. For purposes of this Section 8, each person who controls an Initial Purchaser within the meaning of either the Act or the
Exchange Act and each director, officer, employee, Affiliate and agent of an Initial Purchaser shall have the same rights to contribution as such Initial Purchaser, and each person who controls the Company within the meaning of either the Act or the
Exchange Act and each officer and director of the Company shall have the same rights to contribution as the Company, subject in each case to the applicable terms and conditions of this paragraph (d). 

9. Default by an Initial Purchaser. If any one or more Initial Purchasers shall fail to purchase and pay for any of the Securities
agreed to be purchased by such Initial Purchaser hereunder and such failure to purchase shall constitute a default in the performance of its or their obligations under this Agreement, the remaining Initial Purchasers shall be obligated severally to
take up and pay for (in the respective proportions which the principal amount of Securities set forth opposite their names in Schedule I hereto bears to the aggregate principal 

  
 -23- 

 
amount of Securities set forth opposite the names of all the remaining Initial Purchasers) the Securities which the defaulting Initial Purchaser or Initial Purchasers agreed but failed to
purchase; provided, however, that in the event that the aggregate principal amount of Securities which the defaulting Initial Purchaser or Initial Purchasers agreed but failed to purchase shall exceed 10% of the aggregate principal
amount of Securities set forth in Schedule I hereto, the remaining Initial Purchasers shall have the right to purchase all, but shall not be under any obligation to purchase any, of the Securities, and if such nondefaulting Initial Purchasers
do not purchase all the Securities, this Agreement will terminate without liability to any nondefaulting Initial Purchaser or the Company. In the event of a default by any Initial Purchaser as set forth in this Section 9, the Closing Date shall
be postponed for such period, not exceeding five Business Days, as the Representative shall determine in order that the required changes in the Final Memorandum or in any other documents or arrangements may be effected. Nothing contained in this
Agreement shall relieve any defaulting Initial Purchaser of its liability, if any, to the Company or any nondefaulting Initial Purchaser for damages occasioned by its default hereunder. 

10. Termination. This Agreement shall be subject to termination in the absolute discretion of the Representative, by notice given to the
Company prior to delivery of and payment for the Securities, if at any time prior to such time (i) trading in any securities of the Company or trading in securities generally on the New York Stock Exchange or the NASDAQ Global Market shall have
been suspended or limited or minimum prices shall have been established on such exchange; (ii) a banking moratorium shall have been declared either by U.S. federal or New York authorities; or (iii) there shall have occurred any
outbreak or escalation of hostilities, declaration by the United States of a national emergency or war or other calamity or crisis the effect of which on financial markets is such as to make it, in the sole judgment of the Representative,
impractical or inadvisable to proceed with the offering or delivery of the Securities as contemplated in the Disclosure Package and the Final Memorandum (exclusive of any amendment or supplement thereto). 

11. Representations and Indemnities to Survive. The respective agreements, representations, warranties, indemnities and other statements
of the Company or its officers and of the Initial Purchasers set forth in or made pursuant to this Agreement will remain in full force and effect, regardless of any investigation made by or on behalf of the Initial Purchasers or the Company or any
of the indemnified persons referred to in Section 8 hereof, and will survive delivery of and payment for the Securities. The provisions of Sections 7 and 8 hereof shall survive the termination or cancellation of this Agreement. 

12. Notices. All communications hereunder will be in writing and effective only on receipt, and, if sent to the Representative, will be
mailed, delivered or telefaxed to Credit Suisse Securities (USA) LLC, Eleven Madison Avenue, New York, New York 10010-3629, attention of IBCM-Legal, fax no. (212) 325-4296; or, if sent to the Company, will be
mailed, delivered or telefaxed to (918) 524-8587 and confirmed to it at Two Warren Place, 6120 S. Yale Avenue, Suite 1500, Tulsa, Oklahoma 74136-4231, attention of General Counsel. 

13. Successors. This Agreement will inure to the benefit of and be binding upon the parties hereto and their respective successors and
the indemnified persons referred to in Section 8 hereof and their respective successors, and, except as expressly set forth in Section 5(k) hereof, no other person will have any right or obligation hereunder. The term
“successors” shall not include any subsequent purchaser of any Securities from any Initial Purchaser merely by reason of such purchase. 

  
 -24- 

 14. Jurisdiction. The parties hereto agree that any suit, action or proceeding arising out
of or based upon this Agreement or the transactions contemplated hereby shall be instituted in any State or U.S. federal court in The City of New York and County of New York, and waive any objection which they may now or hereafter have to the laying
of venue of any such proceeding, and irrevocably submit to the exclusive jurisdiction of such courts in any suit, action or proceeding. 

15. Integration. This Agreement supersedes all prior agreements and understandings (whether written or oral) between the Company and the
Initial Purchasers, or any of them, with respect to the subject matter hereof. 
 16. Applicable Law. This Agreement will be governed
by and construed in accordance with the laws of the State of New York applicable to contracts made and to be performed within the State of New York. 

17. Waiver of Jury Trial. The Company hereby irrevocably waives, to the fullest extent permitted by applicable law, any and all right to
trial by jury in any legal proceeding arising out of or relating to this Agreement or the transactions contemplated hereby. 
 18. No
Fiduciary Duty. The Company hereby acknowledges that (a) the purchase and sale of the Securities pursuant to this Agreement is an arm’s-length commercial transaction between the Company, on the
one hand, and the Initial Purchasers and any Affiliate through which it may be acting, on the other, (b) the Initial Purchasers are acting as principal and not as an agent or fiduciary of the Company and (c) the Company’s engagement
of the Initial Purchasers in connection with the offering of the Securities and the process leading up to such offering is as independent contractors and not in any other capacity. Furthermore, the Company agrees that it is solely responsible for
making its own judgments in connection with such offering (irrespective of whether any of the Initial Purchasers has advised or is currently advising the Company on related or other matters). The Company agrees that it will not claim that the
Initial Purchasers have rendered advisory services of any nature or respect, or owe an agency, fiduciary or similar duty to the Company, in connection with such transaction or the process leading thereto. 

19. Compliance with USA Patriot Act. In accordance with the requirements of the USA Patriot Act, the Initial Purchasers are
required to obtain, verify and record information that identifies their respective clients, including the Company, which information may include the name and address of their respective clients, as well as other information that will allow the
Initial Purchasers to properly identify their respective clients. 
 20. Counterparts. This Agreement may be signed in one or more
counterparts, each of which shall constitute an original and all of which together shall constitute one and the same agreement. 

  
 -25- 

 21. Headings. The section headings used herein are for convenience only and shall not
affect the construction hereof. 
 22. Definitions. The terms that follow, when used in this Agreement, shall have the meanings
indicated. 
 “Act” shall mean the Securities Act of 1933, as amended, and the rules and regulations of the Commission
promulgated thereunder. 
 “Affiliate” shall have the meaning specified in Rule 501(b) of Regulation D. 

“Business Day” shall mean any day other than a Saturday, a Sunday or a legal holiday or a day on which banking institutions
or trust companies are authorized or obligated by law to close in The City of New York. 
 “Code” shall mean the Internal
Revenue Code of 1986, as amended. 
 “Commission” shall mean the Securities and Exchange Commission. 

“Credit Suisse” shall mean Credit Suisse Securities (USA) LLC. 

“Disclosure Package” shall mean (i) the Preliminary Memorandum, as amended or supplemented at the Execution Time,
(ii) the Final Term Sheet and (iii) any Issuer Written Information. 
 “Exchange Act” shall mean the Securities
Exchange Act of 1934, as amended, and the rules and regulations of the Commission promulgated thereunder. 
 “Execution
Time” shall mean the date and time that this Agreement is executed and delivered by the parties hereto. 
 “Final Term
Sheet” shall mean the term sheet prepared pursuant to Section 5(b) hereof and in the form attached as Schedule II hereto. 

“Investment Company Act” shall mean the Investment Company Act of 1940, as amended, and the rules and regulations of the
Commission promulgated thereunder. 
 “Issuer Written Information” shall mean the writings, in addition to the Preliminary
Memorandum and the Final Term Sheet, that the parties expressly agree in writing to treat as part of the Disclosure Package, as set forth on Schedule III hereto. 

“Regulation D” shall mean Regulation D under the Act. 

“Regulation S” shall mean Regulation S under the Act. 

“Regulation S-X” shall mean Regulation S-X
under the Act. 
 “Trust Indenture Act” shall mean the Trust Indenture Act of 1939, as amended, and the rules and
regulations of the Commission promulgated thereunder. 

  
 -26- 

 If the foregoing is in accordance with your understanding of our agreement, please sign and
return to us the enclosed duplicate hereof, whereupon this letter and your acceptance shall represent a binding agreement between the Company, the Guarantors and the several Initial Purchasers. 

[Signature pages follow] 

  
 -27- 

 
			
	Very truly yours,
	
	SemGroup Corporation
		
	By:	 	 /s/ Robert N. Fitzgerald

		 	Name: Robert N. Fitzgerald
		 	Title: Senior Vice President and Chief
		 	 Financial Officer

	
	Rose Rock Finance Corporation
		
	By:	 	 /s/ Robert N. Fitzgerald

		 	Name: Robert N. Fitzgerald
		 	Title: Chief Financial Officer
	
	Rose Rock Midstream Operating, LLC
		
	By:	 	 /s/ Robert N. Fitzgerald

		 	Name: Robert N. Fitzgerald
		 	Title: Chief Financial Officer
	
	Rose Rock Midstream Energy GP, LLC
		
	By:	 	 /s/ Robert N. Fitzgerald

		 	Name: Robert N. Fitzgerald
		 	Title: Chief Financial Officer
	
	Rose Rock Midstream Crude, L.P.
		
		 	By: Rose Rock Midstream Energy GP, LLC, such Guarantor’s General Partner
		
	By:	 	 /s/ Robert N. Fitzgerald

		 	Name: Robert N. Fitzgerald
		 	Title: Chief Financial Officer

 [SemGroup Purchase Agreement] 

 
			
	Rose Rock Midstream Field Services, LLC
		
	By:	 	 /s/ Robert N. Fitzgerald

		 	Name: Robert N. Fitzgerald
		 	Title: Chief Financial Officer
	
	SemGas, L.P.
	SemMaterials, L.P.
		
		 	By: SemOperating G.P., L.L.C., each such Guarantor’s General Partner
		
	By:	 	 /s/ Robert N. Fitzgerald

		 	Name: Robert N. Fitzgerald
		 	Title: Chief Financial Officer
	
	SemGroup Europe Holding, L.L.C.
		
	By:	 	 /s/ Robert N. Fitzgerald

		 	Name: Robert N. Fitzgerald
		 	Title: Chief Financial Officer
	
	SemOperating G.P., L.L.C.
		
	By:	 	 /s/ Robert N. Fitzgerald

		 	Name: Robert N. Fitzgerald
		 	Title: Chief Financial Officer
	
	SemMexico, L.L.C.
		
	By:	 	 /s/ Robert N. Fitzgerald

		 	Name: Robert N. Fitzgerald
		 	Title: Chief Financial Officer

 [SemGroup Purchase Agreement] 

  
 29 

 
			
	SemDevelopment, L.L.C.
		
	By:	 	 /s/ Robert N. Fitzgerald

		 	Name: Robert N. Fitzgerald
		 	Title: Chief Financial Officer
	
	Mid-America Midstream Gas Services, L.L.C.
		
	By:	 	 /s/ Robert N. Fitzgerald

		 	Name: Robert N. Fitzgerald
		 	Title: Chief Financial Officer
	
	SemCrude Pipeline, L.L.C.
		
	By:	 	 /s/ Robert N. Fitzgerald

		 	Name: Robert N. Fitzgerald
		 	Title: Chief Financial Officer
	
	Wattenberg Holding, LLC
		
		 	By: Rose Rock Midstream Operating, LLC, such Guarantor’s sole member and manager
		
	By:	 	 /s/ Robert N. Fitzgerald

		 	Name: Robert N. Fitzgerald
		 	Title: Chief Financial Officer
	
	Glass Mountain Holding, LLC
		
		 	By: Rose Rock Midstream Operating, LLC, such Guarantor’s sole member and manager 
		
	By:	 	 /s/ Robert N. Fitzgerald

		 	Name: Robert N. Fitzgerald
		 	Title: Chief Financial Officer

 [SemGroup Purchase Agreement] 

 The foregoing Agreement is hereby 

confirmed and accepted as of the 
 date first above written. 

Credit Suisse Securities (USA) LLC 
  

			
	By:	 	 /s/ Max Lipkind

		 	Name: Max Lipkind
		 	Title: Managing Director

 For itself and the other several Initial 

Purchasers named in Schedule I to the 
 foregoing Agreement.

 [SemGroup Purchase Agreement] 

 SCHEDULE I 
  

					
	 Initial Purchasers
	  	Principal Amount of
Notes to be
Purchased	 
	 Credit Suisse Securities (USA) LLC
	  	$	97,896,000	 
	 Scotia Capital (USA) Inc.
	  	 	33,158,000	 
	 Wells Fargo Securities, LLC
	  	 	33,158,000	 
	 ABN AMRO Securities (USA) LLC
	  	 	22,105,000	 
	 Barclays Capital Inc.
	  	 	22,105,000	 
	 BBVA Securities Inc.
	  	 	22,105,000	 
	 BMO Capital Markets Corp.
	  	 	22,105,000	 
	 BNP Paribas Securities Corp.
	  	 	22,105,000	 
	 BOK Financial Securities, Inc.
	  	 	17,368,000	 
	 Regions Securities LLC
	  	 	7,895,000	 
	 Total
	  	$	300,000,000	 

 SCHEDULE II 

[See attached] 

			
	PRICING SUPPLEMENT	 	STRICTLY CONFIDENTIAL

 $300,000,000 

SemGroup Corporation 

7.250% Senior Notes due 2026 

September 15, 2017 
  

 
 Pricing Supplement dated
September 15, 2017 to Preliminary Offering Circular dated September 12, 2017 of SEMGROUP CORPORATION. 
 This Pricing
Supplement is qualified in its entirety by reference to the Preliminary Offering Circular. Capitalized terms used below have the meanings given in the Preliminary Offering Circular. 

The information in this Pricing Supplement supplements the Preliminary Offering Circular and supersedes the information in the Preliminary
Offering Circular to the extent inconsistent with the information in the Preliminary Offering Circular. 
 The notes have not been
registered under the Securities Act of 1933, as amended (the “Securities Act”), or the securities laws of any other jurisdiction, and are being offered only (1) to “qualified institutional buyers” (as defined in Rule 144A
under the Securities Act) and (2) outside the United States to non-U.S. persons in compliance with Regulation S under the Securities Act. 

 

			
	Principal Amount:	  	$300,000,000
	Title of Securities:	  	7.250% Senior Notes due 2026
	Final Maturity Date:	  	March 15, 2026
	Issue Price:	  	98.453%, plus accrued interest from September 20, 2017
	Gross Proceeds:	  	$295,359,000
	Coupon:	  	7.250%
	Yield to Maturity:	  	7.500%
	Spread to Treasury:	  	535 basis points
	Benchmark Treasury:	  	1.625% UST due February 15, 2026
	Record Dates:	  	March 1 and September 1
	Interest Payment Dates:	  	March 15 and September 15
	First Interest Payment Date:	  	March 15, 2018
	Trade Date:	  	September 15, 2017
	Settlement Date:	  	September 20, 2017 (T+3). It is expected that delivery of the notes will be made against payment therefor on or about September 20, 2017, which is the third business day following the date of pricing of the notes (such
settlement cycle being referred to as “T+3”). Under Rule 15c6-1 of the Securities Exchange Act of 1934, as amended, trades in the
secondary

  
 1 

			
		  	market generally are required to settle in two business days unless the parties to any such trade expressly agree otherwise. Accordingly, purchasers who wish to trade the notes on the date of pricing will be required, by virtue of
the fact that the notes initially will settle in T+3, to specify an alternative settlement cycle at the time of any such trade to prevent failed settlement. Purchasers of the notes who wish to trade the notes on the date of pricing should consult
their own advisors.
	Optional Redemption:	  	 Schedule of Redemption Prices
  

Except as described below, the notes are not redeemable at the Company’s option prior to March 15, 2021. On and after such date, the Company may
redeem the notes, in whole or in part, upon not less than 15 nor more than 60 days’ prior notice, at the redemption prices (expressed as percentages of principal amount) set forth below, plus accrued and unpaid interest thereon to, but not
including, the applicable redemption date, subject to the right of holders of record on the relevant record date to receive interest due on the relevant interest payment date, if redeemed during the twelve-month period beginning on March 15 of
each of the years indicated below:

  

					
	 Year
	  	Percentage	 
	 2021
	  	 	103.625	% 
	 2022
	  	 	101.813	% 
	 2023 and thereafter
	  	 	100.000	% 

  

			
		  	  
 Make Whole

 
 In addition, prior to March 15, 2021, the Company may redeem all
or a part of the notes, upon not less than 15 nor more than 60 days’ prior notice, at a redemption price equal to:
  

•    100% of the principal amount of notes redeemed, plus

 
 •    the Applicable
Premium as of, and accrued and unpaid interest to, the redemption date, subject to the rights of holders on the relevant record date to receive interest due on the relevant interest payment date.

 
 “Applicable Premium” means, with respect to any note on any
redemption date, the greater of (A) 1.00% of the principal amount of such note and (B) the excess, if any, of (1) the present value at such redemption date of (a) the

  
 2 

			
		  	redemption price of such note at March 15, 2021 plus (b) all required interest payments due on such note through March 15, 2021 (excluding accrued but unpaid interest to the redemption date), computed using a
discount rate equal to the Treasury Rate as of such redemption date plus 50 basis points, over (2) the principal amount of such note.
		
		  	 “Treasury Rate” means, as of any redemption date, the yield to maturity as of the earlier of (a) such
redemption date or (b) the date on which such notes are defeased or satisfied and discharged, of United States of America Treasury securities with a constant maturity (as compiled and published in the most recent Federal Reserve Statistical
Release H.15 (519) that has become publicly available at least two Business Days prior to such date (or, if such Statistical Release is no longer published (or the relevant information no longer published therein), any publicly available source of
similar market data)) most nearly equal to the period from the redemption date to March 15, 2021; provided, however, that if the period from the redemption date to March 15, 2021, is less than one year, the weekly average
yield on actually traded United States of America Treasury securities adjusted to a constant maturity of one year will be used.

		  	  
 Equity Offerings

 
 Prior to September 15, 2020, the Company may, at its option, on
one or more occasions, redeem up to 35% of the sum of the original aggregate principal amount of notes (and the original principal amount of any Additional Notes) issued under the Indenture at a redemption price equal to 107.250% of the aggregate
principal amount thereof, plus accrued and unpaid interest thereon to, but not including, the redemption date, subject to the right of holders of record on the relevant record date to receive interest due on the relevant interest payment
date, with an amount of cash not greater than the net cash proceeds of one or more Equity Offerings of the Company or any direct or indirect parent of the Company to the extent such net proceeds are contributed to the Company; provided
that:
  
 (1) at least 65% of the sum of the
aggregate principal amount of notes originally issued under the Indenture and the original principal amount of any Additional Notes issued under the Indenture remain outstanding immediately after the occurrence of each such redemption; and

 
 (2) each such redemption occurs within 180 days of
the date of closing of each such Equity Offering.

  
 3 

			
	Distribution:	  	144A and Regulation S with registration rights as set forth in the Preliminary Offering Circular.
		
	Use of Proceeds:	  	The Company plans to use the net proceeds from the offering to reduce outstanding borrowings under its existing revolving credit facility.
		
	Ratings*:	  	 S&P: B+
 Moody’s: B3

		
	Joint Book-Running Managers:	  	 Credit Suisse Securities (USA) LLC
 Scotia
Capital (USA) Inc.
 Wells Fargo Securities, LLC
 ABN AMRO
Securities (USA) LLC
 Barclays Capital Inc.
 BBVA Securities
Inc.
 BMO Capital Markets Corp.
 BNP Paribas Securities Corp. 

		
	Co-Managers:	  	 BOK Financial Securities, Inc.
 Regions
Securities LLC 

		
	CUSIP/ISIN:	  	 144A CUSIP: 81663A AE5
 Reg S CUSIP: U81569
AC6
  
 144A ISIN: US81663AAE55

Reg S ISIN: USU81569AC69

 This material is confidential and is for your information only and is not intended to be used by anyone other than you.
This information does not purport to be a complete description of these securities or the offering. Please refer to the Preliminary Offering Circular for a complete description. 

This communication is being distributed in the United States solely to qualified institutional buyers (as defined in Rule 144A under the Securities Act)
and outside the United States solely to non-U.S. persons as defined under Regulation S in accordance with the applicable provisions of Regulation S. 

This communication does not constitute an offer to sell or the solicitation of an offer to buy any securities in any jurisdiction to any person to whom it
is unlawful to make such offer or solicitation in such jurisdiction. 

  
 4 

 * A securities rating is not a recommendation to buy, sell or hold securities and may be subject to revision
or withdrawal at any time, and each rating should be evaluated independently of any other rating. 

  
 5 

 SCHEDULE III 

None. 

 ANNEX A 

Significant Subsidiaries 
 Beachhead
Holdings LLC, a Delaware limited liability company 
 Beachhead I LLC, a Delaware limited liability company 

Buffalo Parent Gulf Coast Terminals LLC, a Delaware limited liability company 

Buffalo Gulf Coast Terminals LLC, a Delaware limited liability company 

HFOTCO LLC, a Texas limited liability company doing business as Houston Fuel Oil Terminal Company 

Rose Rock Midstream Operating, LLC, a Delaware limited liability company 

Rose Rock Midstream Crude, L.P., a Delaware limited partnership 

Rose Rock Midstream Field Services, LLC, a Delaware limited liability company 

SemCAMS ULC, a Nova Scotia unlimited liability company 

SemCanada Crude Company, a Nova Scotia unlimited liability company 

SemCrude Pipeline, L.L.C., a Delaware limited liability company 

SemGas, L.P., an Oklahoma limited partnership 
 SemMaterials
Mexico S. de R.L. de C.V., a Sociedad de Responsabilidad Limitada de Capital Variable organized under the laws of the United Mexican States 

Wattenberg Holding, LLC, an Oklahoma limited liability company 

 EXHIBIT A-1 

Form of Opinion of Conner & Winters, LLP 

(i) Assuming the accuracy of the representations and warranties and compliance with the agreements and covenants contained in the Purchase Agreement, no
registration under the Act of the Securities, and no qualification of an indenture under the Trust Indenture Act with respect thereto, are required in connection with the purchase of the Securities by the Initial Purchasers or the initial offer and
sale by the Initial Purchasers of the Securities in the manner contemplated in the Purchase Agreement, in the Disclosure Package and in the Final Memorandum, other than any registration or qualification that may be required in connection with an
exchange offer contemplated by the Disclosure Package and the Final Memorandum or in connection with the Registration Rights Agreement. Such counsel expresses no opinion, however, as to when or under what circumstances any Securities initially sold
by the Initial Purchasers may be reoffered or resold. 
 (ii) To such counsel’s knowledge and except as set forth or contemplated in the Disclosure
Package and the Final Memorandum, there is no pending or threatened action, suit or proceeding by or before any court or governmental agency, authority or body or any arbitrator involving the Company or any of the Guarantors or its or their property
that, if the subject of an unfavorable decision, ruling or finding would, individually or in the aggregate, have a Material Adverse Effect. 
 (iii) The
statements in the Preliminary Memorandum and the Final Memorandum under the heading “Certain United States Federal Income Tax Considerations,” insofar as such statements constitute matters of law or summaries of legal matters, fairly
summarize the matters therein described in all material respects. 
 (iv) Each of the Company and the Guarantors has been duly incorporated or formed, as
applicable, and is validly existing and in good standing under the laws of the jurisdiction in which it is chartered or organized, with all requisite power and authority to own or lease, as the case may be, and to operate its properties and conduct
its business as described in the Disclosure Package and the Final Memorandum. Each of the Company and the Guarantors is duly qualified to do business as a foreign corporation, foreign limited liability company or foreign limited partnership, as
applicable, and is in good standing under the laws of each jurisdiction which requires such qualification, except for such jurisdictions where the failure to be so qualified or to be in good standing would not, individually or in the aggregate,
result in a Material Adverse Effect. 
 (v) All the outstanding shares of capital stock, membership interests, limited and general partner interests and
other ownership interests, as applicable, of the Company and each Guarantor have been duly authorized and validly issued and, with respect to the Company and each Guarantor that is a corporation, are fully paid and nonassessable, and, except as
otherwise set forth in the Disclosure Package and the Final Memorandum, all such ownership interests of each Guarantor are owned by the Company either directly or through wholly owned subsidiaries free and clear of any perfected security interest
and, to such counsel’s knowledge, any other security interest, claim, lien or encumbrance. 

 (vi) None of the execution and delivery of the Indenture, the Registration Rights Agreement or the Purchase
Agreement by the Company and the Guarantors, the issuance and sale of the Securities or the consummation of any other of the transactions contemplated therein (other than performance under the indemnification sections of the Purchase Agreement and
the Registration Rights Agreement, as to which no opinion is herein rendered): (i) will result in any violation of the provisions of the charter, by-laws or comparable constituent documents of the Company or
any Guarantor; (ii) will constitute a default under, or result in the creation or imposition of any lien, charge or encumbrance upon any property or assets of the Company or any of the Guarantors pursuant to the agreements and instruments
listed on Exhibit A hereto; or (iii) will result in any violation of any statute, law, rule, regulation or administrative regulation applicable to the Company or any Guarantor which in such counsel’s experience would normally apply to
transactions of the type contemplated by the Indenture, the Registration Right Agreement or the Purchase Agreement or any administrative or court judgment, order or decree known to us applicable to the Company or any Guarantor, except, in the case
of clauses (ii) and (iii) above, for such breaches, violations, liens, charges or encumbrances as would not, individually or in the aggregate, have a Material Adverse Effect. 

(vii) The Purchase Agreement has been duly authorized, executed and delivered by the Company and each of the Guarantors. 

(viii) The Indenture has been duly authorized, executed and delivered by the Company and each of the Guarantors. 

(ix) The Notes have been duly authorized by the Company. 
 (x) The
Guarantees have been duly authorized by the Guarantors. 
 (xi) The Registration Rights Agreement has been duly authorized, executed and delivered by the
Company and each of the Guarantors. 
 (xii) The statements in the Preliminary Memorandum and Final Memorandum under the heading “Exchange Offer;
Registration Rights,” insofar as such statements purport to summarize certain provisions of the Registration Rights Agreement, fairly summarize such provisions in all material respects. 

(xiii) Assuming the accuracy of the representations and warranties and compliance with the agreements and covenants contained in the Purchase Agreement, no
consent, approval, authorization, filing with or order of any court or governmental agency or body, other than such consents, approvals, authorizations, filings or orders that have been obtained or made, is required in connection with the
transactions contemplated under the Purchase Agreement, the Indenture or the Registration Rights Agreement, except such as may be required under the Exchange Act, state securities or blue sky laws or any other securities laws of any jurisdiction in
which the Securities are offered or sold and, in the case of the Registration Rights Agreement, such as will be obtained under the Act and the Trust Indenture Act (it being understood that such counsel expresses no opinion with respect to such
securities law requirements beyond that set forth in paragraph (i) above). 

 Form of Negative Assurance Letter of Conner & Winters, LLP 

September 20, 2017 
 Credit Suisse
Securities (USA) LLC 
 As Representative of the Initial Purchasers 

listed on Schedule I hereto 
 c/o Credit Suisse Securities (USA)
LLC 
 Eleven Madison Avenue 
 New York, New York 10010-3629

 Ladies and Gentlemen: 
 We have acted as
counsel to SemGroup Corporation, a Delaware corporation (the “Company”), and to Rose Rock Finance Corporation, a Delaware corporation, Rose Rock Midstream Operating, LLC, a Delaware limited liability company, Rose Rock Midstream Energy GP,
LLC, a Delaware limited liability company, Rose Rock Midstream Crude, L.P., a Delaware limited partnership, Rose Rock Midstream Field Services, LLC, a Delaware limited liability company, SemGas, L.P., a Oklahoma limited partnership, SemMaterials,
L.P., an Oklahoma limited partnership, SemGroup Europe Holding, L.L.C., a Delaware limited liability company, SemOperating G.P., L.L.C., an Oklahoma limited liability company, SemMexico, L.L.C., an Oklahoma limited liability company, SemDevelopment,
L.L.C., a Delaware limited liability company, Mid-America Midstream Gas Services, L.L.C., an Oklahoma limited liability company, SemCrude Pipeline, L.L.C., a Delaware limited liability company, Wattenberg
Holding, LLC, an Oklahoma limited liability company, and Glass Mountain Holding, LLC, an Oklahoma limited liability company (the “Guarantors”), in connection with the sale on the date hereof of $300,000,000 principal amount of 7.250%
Senior Notes due 2026 of the Company (the “Notes”) to the several initial purchasers (the “Initial Purchasers”) named in Schedule I to that certain Purchase Agreement dated as of September 15, 2017 among the Company, the
Guarantors and you as the Representative of the Initial Purchasers (the “Purchase Agreement”). 
 This letter is furnished to you
pursuant to Section 6(a)(i) of the Purchase Agreement. Except as otherwise provided herein, capitalized terms used herein but not otherwise defined herein shall have the meanings set forth in the Purchase Agreement. 

We have participated in conferences with officers and other representatives of the Company, representatives of the independent registered
public accountants for the Company and with representatives of the Initial Purchasers at which the contents of the Disclosure Package and the Final Memorandum and related matters were discussed and, although we are not passing upon and do not assume
any responsibility for the accuracy, completeness or fairness of the statements contained in the Disclosure Package or the Final Memorandum (other than as specified in paragraphs (iii) and (xii) of our opinion being delivered to you on the date
hereof), on the basis of the foregoing, nothing has come to our attention which would lead us to believe that the Disclosure Package, as of the first time when sales of the Securities are made, or that the Final Memorandum, as of its date or at the
Closing Date, contained or contains an untrue statement of a material fact or omitted or omits 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 (it being understood that we express no opinion or belief as to the content of the financial
statements or other financial data derived therefrom or assessments of or reports on the effectiveness of internal control over financial reporting included in the Disclosure Package or the Final Memorandum or any amendments or supplements thereto).

 We are furnishing this letter to you pursuant to the Purchase Agreement. It is for the sole benefit of and may only be relied upon by you
and the Initial Purchasers and your counsel, and it is not to be quoted in whole or in part or otherwise referred to, nor is it to be filed with or delivered or communicated to any government agency or any other person, without our prior written
consent. 
 Very truly yours, 

 EXHIBIT A-2 

Form of Opinion of Gibson Dunn & Crutcher LLP 

1. The Indenture constitutes a legal, valid and binding obligation of the Company and the Guarantors, enforceable against the
Company and the Guarantors in accordance with its terms. 
 2. When the Notes have been duly executed and authenticated in
accordance with the provisions of the Indenture and delivered to and paid for by the Initial Purchasers in accordance with the terms of the Purchase Agreement, the Notes and the Guarantee of each Guarantor will be legal, valid and binding
obligations of the Company and each such Guarantor, respectively, enforceable against them in accordance with their terms. 

3. The execution and delivery by the Company and each of the Guarantors of the Closing Date Note Documents to which they are a
party, the performance of their obligations thereunder, and the issuance by the Company and the Guarantors of the Notes and the Guarantees to the Initial Purchasers, do not and will not (A) result in a breach of or default under or
(B) result in or require the creation or imposition of any lien or encumbrance upon any assets of such obligor under any agreement listed on Annex B (the “Specified Contracts”). 

4. Insofar as the statements in the Offering Circular under the caption “Description of the Notes” purport to
describe specific provisions of the Notes or the other Closing Date Note Documents, such statements present in all material respects an accurate summary of such provisions. 

5. To the extent that the statements in the Offering Circular under the caption “Description of Other
Indebtedness—SemGroup Credit Agreement” purport to describe specific provisions of the Credit Agreement (as defined on Annex B), such statements present in all material respects an accurate summary of such provisions. 

6. To the extent that the statements in the Offering Circular under the caption “Description of Other
Indebtedness—5.625% Senior Notes due 2022” purport to describe specific provisions of the 2014 Indenture (as defined on Annex B) and the Senior Notes Due 2022 (as defined on Annex B), such statements present in
all material respects an accurate summary of such provisions. 
 7. To the extent that the statements in the Offering
Circular under the caption “Description of Other Indebtedness—5.625% Senior Notes due 2023” purport to describe specific provisions of the 2015 Indenture (as defined on Annex B) and the Senior Notes Due 2023 (as defined
on Annex B), such statements present in all material respects an accurate summary of such provisions. 
 8. To
the extent that the statements in the Offering Circular under the caption “Description of Other Indebtedness—6.375% Senior Notes due 2025” purport to describe specific provisions of the March 2017 Indenture (as defined on Annex
B) and the Senior Notes Due 2025 (as defined on Annex B), such statements present in all material respects an accurate summary of such provisions.

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