Document:

EX-10.1

 Exhibit 10.1 

EXECUTION VERSION 

SUPPORT AGREEMENT 
 THIS
SUPPORT AGREEMENT, dated as of February 16, 2021 (this “Agreement”), is entered into by and among Energy Transfer LP, a Delaware limited partnership (“Parent”), Elk Merger Sub LLC, a Delaware limited liability
company and a wholly owned subsidiary of Parent (“Merger Sub”), Elk GP Merger Sub LLC, a Delaware limited liability company and a wholly owned subsidiary of Parent (“GP Merger Sub” and, together with Parent and
Merger Sub, the “Parent Parties”), Enable Midstream Partners, LP, a Delaware limited partnership (the “Partnership”), and Enable GP, LLC, a Delaware limited liability company and the general partner of the
Partnership (the “General Partner” and, together with the Partnership, the “Partnership Parties”), and CenterPoint Energy, Inc., a Texas corporation (the “Unitholder”). 

RECITALS: 

WHEREAS, concurrently with the execution of this Agreement, the Parent Parties and the Partnership Parties are entering into an
Agreement and Plan of Merger (as it may be amended, supplemented, restated or otherwise modified from time to time, the “Merger Agreement”), pursuant to which, among other things, (a) Merger Sub will merge with and into the
Partnership, with the Partnership surviving the Merger as a wholly owned subsidiary of Parent (the “LP Merger”), and (b) GP Merger Sub will merge with and into the General Partner, with the General Partner surviving the GP
Merger as a wholly owned subsidiary of Parent (the “GP Merger” and together with the LP Merger, the “Mergers”); 

WHEREAS, as of the date hereof, Unitholder either directly or through one of its wholly owned Subsidiaries is the record and beneficial
owner of, and has the right to vote and dispose of (i) 233,856,623 common units representing limited partner interests in the Partnership (the “Partnership Common Units”), which represent approximately 53.7% of the issued and
outstanding Partnership Common Units, and (ii) 14,520,000 10% Series A Fixed-to-Floating Non-Cumulative Redeemable Perpetual
Preferred Units representing limited partner interests in the Partnership (the “Series A Preferred Units”) and (iii) 400 economic units and 500 management units, representing a 40% economic interest and 50% management interest,
respectively, in the General Partner (collectively, the “GP LLC Interests”). 
 WHEREAS, as of the date hereof, the
General Partner is the record and beneficial owner of all of the general partner interest in the Partnership and all of the incentive distribution rights in the Partnership; and 

WHEREAS, as a material inducement to the Parent Parties to enter into the Merger Agreement, the Parent Parties have required Unitholder
to agree, and Unitholder has agreed, to enter into this agreement and abide by the covenants and obligations set forth herein with respect to the Covered Units (as hereinafter defined) and the GP LLC Interests. 

NOW THEREFORE, in consideration of the foregoing and the mutual representations, warranties, covenants and agreements herein contained,
and intending to be legally bound hereby, the parties hereto agree as follows: 

 ARTICLE 1 

GENERAL 

Section 1.1    Defined Terms. The following capitalized terms, as used in this Agreement, shall have the
meanings set forth below. Capitalized terms used but not otherwise defined herein shall have the meanings ascribed thereto in the Merger Agreement. 

“Covered Units” means the Existing Units, together with any Partnership Common Units and Series A Preferred Units that
Unitholder or CenterPoint Energy Midstream, Inc., a Delaware corporation (“Caribou Midstream”), acquires, either beneficially or of record, on or after the date of this Agreement, including any Partnership Common Units and Series A
Preferred Units received as distributions, as a result of a split, reverse split, combination, merger, consolidation, reorganization, reclassification, recapitalization or similar transaction or upon exercise of any option, warrant or other security
or instrument exercisable, convertible or exchangeable into Partnership Common Units or Series A Preferred Units. 
 “Existing
Units” means all Partnership Common Units and Series A Preferred Units owned, either beneficially or of record, by Unitholder or Caribou Midstream on the date of this Agreement. 

“Partnership Entity” means each of the Partnership and its Subsidiaries. 

“Permitted Transfer” means a Transfer of Covered Units by Unitholder or Caribou Midstream (or an affiliate thereof) to an
affiliate of Unitholder or Caribou Midstream or in connection with a bona fide pledge or financing arrangement, provided that such transferee affiliate, pledgee or financing source, as the case may be, agrees in writing to assume all
of Unitholder’s or Caribou Midstream’s obligations hereunder in respect of the Covered Units subject to such Transfer and to be bound by, and comply with, the terms of this Agreement, with respect to the Covered Units subject to such
Transfer, and all other Covered Units owned beneficially or of record from time to time by such transferee affiliate, to the same extent as Unitholder or Caribou Midstream is bound hereunder (in the case of a pledgee or financing source, solely if
and to the extent such pledgee or financing source actually obtains beneficial ownership of such Covered Units). 

“Transfer” means, directly or indirectly, to sell, transfer, assign or otherwise dispose of (whether by merger or
consolidation (including by conversion into securities or other consideration as a result of such merger or consolidation), by tendering into any tender or exchange offer, by testamentary disposition, by operation of law or otherwise), either
voluntarily or involuntarily, or to enter into any contract, option or other arrangement or understanding with respect to the voting of or sale, transfer, conversion, assignment or other disposition of (whether by merger or consolidation) including
by conversion into securities or other consideration as a result of such merger or consolidation), by tendering into any tender or exchange offer, by testamentary disposition, by operation of law or otherwise). 

 ARTICLE 2 

VOTING 

Section 2.1    Agreement to Vote Partnership Common Units. Unitholder hereby irrevocably agrees that promptly
following the time when the Form S-4 has been declared effective by the SEC under the Securities Act (and in any case, within 24 hours of the time the Form S-4 is
declared effective) and Unitholder has received from Parent a copy of the Consent Solicitation Statement/Prospectus included therein, Unitholder shall, and to the extent applicable, shall cause Caribou Midstream to, execute and deliver (or cause to
be delivered) a written consent, substantially in the form attached hereto, covering all of the Unitholder’s Covered Units that are Partnership Common Units approving each of the matters for which the Partnership is soliciting consents of the
holders of Partnership Common Units in accordance with the Merger Agreement pursuant to the Consent Solicitation Statement/Prospectus (such consent, once validly received with respect to a majority of the outstanding Partnership Common Units, the
“Requisite Unitholder Approval”). Any such written consent shall be given in accordance with such procedures relating thereto so as to ensure that it is duly counted for purposes of recording the results of such consent. During the
term of this Agreement, Unitholder shall oppose, vote against and not consent to, with respect to the Covered Units, any other action, agreement or proposal intended to, or which has the effect of or reasonably would be expected to have the effect
of, impeding, delaying, restricting, limiting or interfering with the consummation of the Mergers and the other transactions contemplated by the Merger Agreement, and the performance of Unitholder’s obligations hereunder or the obligations of
the Partnership or the General Partner under the Merger Agreement, including for the avoidance of doubt, opposing any Acquisition Proposal. 

Section 2.2    No Inconsistent Agreements. Unitholder hereby represents, covenants and agrees that, except for
this Agreement, neither Unitholder nor Caribou Midstream (a) has entered into, and shall not enter into at any time while this Agreement remains in effect, any voting agreement or voting trust with respect to its Covered Units or GP LLC
Interests or (b) has granted, and shall not grant at any time while this Agreement remains in effect, a proxy, consent or power of attorney with respect to its Covered Units or GP LLC Interests (except pursuant to
Section 2.3). 
 Section 2.3    Proxy. In order to secure the obligations set
forth herein, Unitholder hereby irrevocably appoints Parent, or any nominee thereof, with full power of substitution and resubstitution, as its true and lawful proxy and
attorney-in-fact, only in the event that Unitholder does not comply with its obligations in Section 2.1, to vote or execute written consents
with respect to Unitholder’s Covered Units in accordance with Section 2.1. Unitholder hereby affirms that this proxy is coupled with an interest and shall be irrevocable, except upon termination of this Agreement, and
Unitholder will take such further action or execute such other instruments as may be necessary to effectuate the intent of this proxy and hereby revokes any proxy previously granted by Unitholder with respect to any of its Covered Units. Parent may
terminate this proxy at any time at its sole election by written notice provided to Unitholder. 

Section 2.4    Waiver of Conversion Rights. During the term of this Agreement, Unitholder irrevocably waives
(i) any and all rights it has under the Partnership Agreement and (ii) any and all obligations of the Partnership under the Partnership Agreement, in each case, with respect to conversion of the Series A Preferred Units into Partnership
Common Units or the occurrence of a Series A Change of Control (as defined in the Partnership Agreement) in 

 
connection with the Mergers and the transactions contemplated by the Merger Agreement. Further, Unitholder understands, acknowledges and accepts the merger consideration to be received pursuant
to Section 2.1(b) of the Merger Agreement by such Unitholder in its capacity as the holder of the Series A Preferred Units, understands, acknowledges and agrees that such Unitholder is not entitled to receive any additional consideration for
the Series A Preferred Units in connection with the Mergers and the transactions contemplated by the Merger Agreement in its capacity as the holder of the Series A Preferred Units, and agrees that it shall not oppose the treatment of such
Series A Preferred Units under the terms of the Merger Agreement. 
 ARTICLE 3 

REPRESENTATIONS AND WARRANTIES 

Section 3.1    Representations and Warranties of Unitholder. Unitholder (except to the extent otherwise
provided herein) hereby represents and warrants to the Parent Parties and the Partnership as follows: 

(a)    Organization; Authorization; Validity of Agreement; Necessary Action. Unitholder has the requisite power and
authority and/or capacity to execute and deliver this Agreement and to carry out its obligations hereunder. The execution and delivery by Unitholder of this Agreement and the performance by Unitholder of its obligations hereunder have been duly and
validly authorized by Unitholder and no other actions or proceedings are required on the part of Unitholder to authorize the execution and delivery of this Agreement or the performance by Unitholder of its obligations hereunder. This Agreement has
been duly executed and delivered by Unitholder and, assuming the due authorization, execution and delivery of this Agreement by the Parent Parties and the Partnership Parties, constitutes a legal, valid and binding agreement of Unitholder,
enforceable against Unitholder in accordance with its terms, subject to bankruptcy, insolvency, fraudulent transfer, reorganization, moratorium and similar laws of general applicability relating to or affecting creditors’ rights and to general
equitable principles. 
 (b)    Ownership. Unitholder is the record and beneficial owner of, and has good and
valid title to, the Existing Units that are Series A Preferred Units, and Caribou Midstream is the record and beneficial owner of, and has good and valid title to, the Existing Units that are Partnership Common Units and the GP LLC Interests, each
free and clear of any Liens, except as may be provided for in this Agreement. Unitholder owns directly all of the issued and outstanding capital stock of Caribou Midstream. During the term of this Agreement, the Covered Units and the GP LLC
Interests will be beneficially and legally owned by Unitholder, except in the case of a Permitted Transfer of any Covered Units (in which case this representation shall, with respect to such Covered Units, be made by the transferee of such Covered
Units). Except as provided for in this Agreement, Unitholder, directly or indirectly, has and will have at all times during the term of this Agreement sole voting power (including the right to control such vote as contemplated herein), sole power of
disposition, sole power to issue instructions with respect to the matters set forth in Article 2, and sole power to agree to all of the matters set forth in this Agreement, in each case with respect to all of the Covered
Units and the GP LLC Interests at any time during the term of this Agreement, except in the case of a Permitted Transfer of Covered Units (in which case this representation shall, with respect to the Covered Units subject to such Transfer, be made
by the transferee of such Covered Units). Except for the Existing Units, Unitholder does not, directly or indirectly, legally or beneficially own or have any option, warrant or other right to acquire any

 
securities of a Partnership Entity that are or may by their terms become entitled to vote or any securities that are convertible or exchangeable into or exercisable for any securities of a
Partnership Entity that are or may by their terms become entitled to vote, nor is Unitholder subject to any contract, agreement, arrangement, understanding or relationship, other than this Agreement, that obligates it to vote, acquire or dispose of
any securities of a Partnership Entity or the GP LLC Interests. The Unitholder has caused Caribou Midstream to consent with respect to all of its GP LLC Interests to the Merger Agreement and the GP Merger. 

(c)    No Violation. Neither the execution and delivery of this Agreement by Unitholder nor its performance of its
obligations under this Agreement will (i) result in a violation or breach of, or conflict with any provisions of, or constitute a default (or an event which, with notice or lapse of time or both, would constitute a default) under, or result in
the termination or cancellation of, or give rise to a right of purchase under, or result in the creation of any Lien (other than under this Agreement) upon any of the properties, rights or assets (including but not limited to the Existing Units)
owned by Unitholder under, any of the terms, conditions or provisions of any note, bond, mortgage, indenture, deed of trust, license, contract, lease, agreement or other instrument or obligation of any kind to which Unitholder is a party or by which
it or any of its properties, rights or assets may be bound, (ii) violate any Law applicable to Unitholder or any of its properties, rights or assets, or (iii) result in a violation or breach of or conflict with its organizational and
governing documents, except in the case of clauses (i) and (ii) as would not reasonably be expected to prevent or materially delay the ability of Unitholder to perform its obligations hereunder. 

(d)    Consents and Approvals. No consent, approval, order or authorization of, or registration, declaration or
filing with, any Governmental Entity is necessary to be obtained or made by Unitholder in connection with its execution, delivery and performance of this Agreement, except for any reports under the Exchange Act as may be required in connection with
this Agreement and the transactions contemplated hereby. 
 (e)    Reliance by Parent Parties and the Partnership
Parties. Unitholder understands and acknowledges that the Parent Parties and the Partnership Parties are entering into the Merger Agreement in reliance upon Unitholder’s execution and delivery of this Agreement and the representations,
warranties, covenants and obligations of Unitholder contained herein. 
 (f)    Adequate Information. Unitholder
acknowledges that it is a sophisticated party with respect to the Covered Units and has adequate information concerning the business and financial condition of the Partnership to make an informed decision regarding the transactions contemplated by
this Agreement and has, independently and without reliance upon any of the Parent Parties and based on such information as Unitholder has deemed appropriate, made its own analysis and decision to enter into this Agreement. Unitholder acknowledges
that no Parent Party has made or is making any representation or warranty, whether express or implied, of any kind or character except as expressly set forth in this Agreement or in the Merger Agreement. 

Section 3.2    Representations and Warranties of Parent Parties. Each of the Parent Parties hereby represents
and warrants to Unitholder and the Partnership Parties that the execution and delivery of this Agreement by each of the Parent Parties and the consummation of the transactions contemplated hereby have been duly and validly authorized by all
necessary action on the part of the board of directors of Parent GP. The Parent Parties acknowledge that neither Unitholder nor the Partnership Parties have made and Unitholder and the Partnership Parties are not making any representation or
warranty of any kind except as expressly set forth in this Agreement. 

 Section 3.3    Representations and Warranties of the Partnership
Parties. Each of the Partnership Parties hereby represents and warrants to Unitholder and the Parent Parties that the execution and delivery of this Agreement by the Partnership Parties and the consummation of the transactions contemplated
hereby have been duly and validly authorized by all necessary action on the part of the board of directors of the General Partner on behalf of the Partnership and the General Partner. Each of the Partnership Parties acknowledges that neither
Unitholder nor the Parent Parties have made and Unitholder and the Parent Parties are not making any representation or warranty of any kind except as expressly set forth in this Agreement. 

ARTICLE 4 
 OTHER
COVENANTS 
 Section 4.1    Prohibition on Transfers, Other Actions. 

(a)    Until the termination of this Agreement in accordance with Section 6.1, and except for a
Permitted Transfer, Unitholder hereby agrees not to, and agrees not to permit Caribou Midstream to, Transfer any of the Covered Units or GP LLC Interests, beneficial ownership thereof or any other interest therein. Any purported Transfer not in
compliance with this Section 4.1(a) shall be void ab initio. 
 (b)    Unitholder agrees that if it or
Caribou Midstream attempts to Transfer (other than a Permitted Transfer), vote or provide any other person with the authority to vote any of the Covered Units or GP LLC Interests other than in compliance with this Agreement, Unitholder
unconditionally and irrevocably (during the term of this Agreement) instructs the Partnership and the General Partner to not, (i) permit any such Transfer on its books and records, (ii) issue a book-entry interest or a new certificate
representing any of the Covered Units or GP LLC Interests or (iii) record such vote unless and until Unitholder has complied in all respects with the terms of this Agreement. 

Section 4.2    Further Assurances. Each of the parties hereto agrees that it will use its reasonable best
efforts to do all things reasonably necessary to effectuate this Agreement. 
 Section 4.3    Tax
Matters.
 (a)    Unitholder shall deliver to Vinson & Elkins a duly executed certificate
containing such representations as shall be reasonably requested to enable Vinson & Elkins to render the opinion of counsel referred to in Section 6.2(e) of the Merger Agreement and shall provide such other information as reasonably
requested by Vinson & Elkins for purposes of rendering such opinion. 
 (b)    For U.S. federal
(and applicable state and local) income tax purposes, Unitholder hereby agrees to treat and report the Mergers consistently with the Intended Tax Treatment. 

 (c)    Each of the Partnership and the General Partner
hereby agrees not to waive the Closing condition set forth in Section 6.2(e) of the Merger Agreement without the express prior written consent of Unitholder.

ARTICLE 5 
 NO
SOLICITATION 
 Section 5.1    No Solicitation. Prior to the termination of this Agreement, Unitholder
shall not, and shall use its reasonable best efforts to cause its officers, employees, legal counsel, financial advisors, agents and other representatives (collectively, “Representatives”) not to (a) solicit, initiate,
knowingly encourage or knowingly facilitate any Acquisition Proposal or any inquiries regarding the submission of any Acquisition Proposal or any inquiries regarding any Transfer of GP LLC Interests, (b) engage or participate in any discussions
or negotiations regarding, or furnish any third party any confidential information regarding, the Partnership or its Subsidiaries in response to or in connection with any Acquisition Proposal or any Transfer of GP LLC Interests or (c) enter
into any agreement with respect to any Acquisition Proposal or Transfer of GP LLC Interests or approve or resolve to approve any Acquisition Proposal or any Transfer of GP LLC Interests. Unitholder shall, and shall use its reasonable best efforts to
cause its Representatives to, immediately cease and cause to be terminated all existing discussions or negotiations with any third party conducted prior to the date of this Agreement with respect to any Acquisition Proposal. In addition, for
purposes of this Agreement, the Partnership shall not be deemed an affiliate of Unitholder, and any officer, director, employee, agent or advisor of the Partnership (in each case, in their capacities as such), shall not be deemed a Representative of
Unitholder. 
 ARTICLE 6 

MISCELLANEOUS 

Section 6.1    Termination. This Agreement shall remain in effect until the earlier to occur of (a) the
Effective Time and (b) the valid termination of the Merger Agreement in accordance with its terms (including after any extension thereof), in which case this Agreement shall terminate and be of no further force and effect with respect to all
parties hereto. Nothing in this Section 6.1 and no termination of this Agreement shall relieve or otherwise limit any party of liability for any breach of this Agreement occurring prior to such termination. 

Section 6.2    No Ownership Interest. Nothing contained in this Agreement shall be deemed to vest in any
Parent Party any direct or indirect ownership or incidence of ownership of or with respect to any Covered Units. All rights, ownership and economic benefit relating to the Covered Units shall remain vested in and belong to Unitholder, and Parent
shall have no authority to direct Unitholder in the voting or disposition of any of the Covered Units, except as otherwise provided herein. 

Section 6.3    Publicity. Unitholder hereby permits Parent and the Partnership to include and disclose in the
Consent Solicitation Statement/Prospectus, and in such other schedules, certificates, applications, agreements or documents as such entities reasonably determine to be necessary or appropriate in connection with the consummation of the Mergers and
the transactions contemplated by the Merger Agreement Unitholder’s identity and ownership of the Covered Units, and the nature of Unitholder’s commitments, arrangements and understandings pursuant to this

 
Agreement. Parent and the Partnership hereby permit Unitholder to disclose this Agreement and the transactions contemplated by the Merger Agreement in any reports required to be filed by
Unitholder or any of its affiliates under the Exchange Act. 
 Section 6.4    Notices. All notices and other
communications hereunder shall be in writing and shall be deemed given when delivered personally or by facsimile or email (upon telephonic confirmation of receipt) or on the first business day following the date of dispatch if delivered by a
recognized next day courier service. All notices hereunder shall be delivered as set forth below or pursuant to such other instructions as may be designated in writing by the party to receive such notice: 

If to Parent, Merger Sub or GP Merger Sub, to: 

Energy Transfer LP 
 8111
Westchester Drive, Suite 700 
 Dallas, Texas 75225 

	 	Attention:	 Thomas P. Mason 

	 	Email:	 Tom.Mason@energytransfer.com 

with copies to: 

Latham & Watkins LLP 

811 Main Street, Suite 3700 

Houston, Texas 77002 

	 	Facsimile:	 (713) 546-7401 

	 	Attention:	 William N. Finnegan IV 

	 	 	 Kevin M. Richardson 

	 	Email:	 bill.finnegan@lw.com 

	 	 	 kevin.richardson@lw.com 

If to Unitholder, to: 

CenterPoint Energy, Inc. 
 1111
Louisiana Street 
 Houston, Texas 77002 

Facsimile: (713) 207-9680 

Attention: Monica Karuturi 

Email: monica.karuturi@centerpointenergy.com 

with copies to: 
 Baker Botts
L.L.P. 
 910 Louisiana Street 

Houston, Texas 77002 
 Facsimile:
(713) 229-7784 
 Attention: Timothy S. Taylor 

Email: timothy.taylor@bakerbotts.com 

 and 

Wachtell, Lipton, Rosen & Katz 

51 West 52nd Street 
 New York, NY
10019 

	 	Facsimile:	 (212) 403-2000 

	 	Attention:	 Sabastian V. Niles 

	 	 	 Zachary S. Podolsky 

	 	Email:	 SVNiles@wlrk.com 

	 	 	 ZSPodolsky@wlrk.com 

If to the Partnership or the General Partner, to: 

Enable Midstream Partners, LP 

499 West Sheridan Avenue, Suite 1500 

Oklahoma City, Oklahoma 

	 	Facsimile:	 346-701-2918

	 	Attention:	 Mark C. Schroeder 

	 	Email:	 mark.schroeder@enablemidstream.com 

with copies to: 

Vinson & Elkins L.L.P. 

1001 Fannin Street, Suite 2500 

Houston, Texas 77002 

	 	Facsimile:	 713-615-5956

	 	Attention:	 David P. Oelman 

	 	 	 Stephen M. Gill 

	 	 	 Scott D. Rubinsky 

	 	Email:	 doelman@velaw.com 

	 	 	 sgill@velaw.com 

	 	 	 srubinsky@velaw.com 

Section 6.5    Interpretation. The words “hereof,” “herein” and “hereunder” and
words of similar import when used in this Agreement shall refer to this Agreement as a whole and not to any particular provision of this Agreement, and Section references are to this Agreement unless otherwise specified. Whenever the words
“include,” “includes” or “including” are used in this Agreement, they shall be deemed to be followed by the words “without limitation.” The meanings given to terms defined herein shall be equally applicable to
both the singular and plural forms of such terms. The headings contained in this Agreement are for reference purposes only and shall not affect in any way the meaning or interpretation of this Agreement. This Agreement is the product of negotiation
by the parties having the assistance of counsel and other advisers. It is the intention of the parties that this Agreement not be construed more strictly with regard to one party than with regard to the others. 

Section 6.6    Counterparts. This Agreement may be executed in two or more counterparts, each of which shall
be an original, with the same effect as if the signatures thereto 

 
and hereto were upon the same instrument, and shall become effective when one or more counterparts have been signed by each of the parties and delivered (by telecopy, electronic delivery or
otherwise) to the other parties. Signatures to this Agreement transmitted by facsimile transmission, by electronic mail in “portable document format” (“.pdf”) form, or by any other electronic means intended to preserve the
original graphic and pictorial appearance of a document, will have the same effect as physical delivery of the paper document bearing the original signature. 

Section 6.7    Entire Agreement. This Agreement and, solely to the extent of the defined terms referenced
herein, the Merger Agreement, embody the complete agreement and understanding among the parties hereto with respect to the subject matter hereof and supersede and preempt any prior understandings, agreements or representations by or among the
parties, written and oral, that may have related to the subject matter hereof in any way. 

Section 6.8    Governing Law; Consent to Jurisdiction; Waiver of Jury Trial. 

(a)    THIS AGREEMENT AND THE AGREEMENTS, INSTRUMENTS AND DOCUMENTS CONTEMPLATED HEREBY AND ALL DISPUTES BETWEEN THE
PARTIES UNDER OR RELATING TO THIS AGREEMENT OR THE FACTS AND CIRCUMSTANCES LEADING TO ITS EXECUTION, WHETHER IN CONTRACT, TORT OR OTHERWISE, SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF DELAWARE (WITHOUT REFERENCE
TO SUCH STATE’S PRINCIPLES OF CONFLICTS OF LAW). THE DELAWARE COURT OF CHANCERY (AND IF THE DELAWARE COURT OF CHANCERY SHALL BE UNAVAILABLE, ANY DELAWARE STATE COURT AND THE FEDERAL COURT OF THE UNITED STATES OF AMERICA SITTING IN THE STATE OF
DELAWARE) WILL HAVE EXCLUSIVE JURISDICTION OVER ANY AND ALL DISPUTES BETWEEN THE PARTIES HERETO, WHETHER IN LAW OR EQUITY, BASED UPON, ARISING OUT OF OR RELATING TO THIS AGREEMENT AND THE AGREEMENTS, INSTRUMENTS AND DOCUMENTS CONTEMPLATED HEREBY OR
THE FACTS AND CIRCUMSTANCES LEADING TO ITS EXECUTION, WHETHER IN CONTRACT, TORT OR OTHERWISE. EACH OF THE PARTIES IRREVOCABLY CONSENTS TO AND AGREES TO SUBMIT TO THE EXCLUSIVE JURISDICTION OF SUCH COURTS IN ANY SUCH DISPUTE, IRREVOCABLY CONSENTS TO
THE SERVICE OF THE SUMMONS AND COMPLAINT AND ANY OTHER PROCESS IN ANY OTHER ACTION OR PROCEEDING RELATING TO THE TRANSACTIONS CONTEMPLATED BY THIS AGREEMENT, ON BEHALF OF ITSELF OR ITS PROPERTY, BY DELIVERY IN ANY METHOD CONTEMPLATED BY
SECTION 6.4 OR IN ANY OTHER MANNER AUTHORIZED BY LAW, AND HEREBY WAIVES, AND AGREES NOT TO ASSERT IN ANY SUCH DISPUTE, TO THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW, ANY CLAIM THAT (i) SUCH PARTY IS NOT PERSONALLY
SUBJECT TO THE JURISDICTION OF SUCH COURTS, (ii) SUCH PARTY AND SUCH PARTY’S PROPERTY IS IMMUNE FROM ANY LEGAL PROCESS ISSUED BY SUCH COURTS OR (iii) ANY LITIGATION COMMENCED IN SUCH COURTS IS BROUGHT IN AN INCONVENIENT FORUM. 

(b)    THE PARTIES HEREBY KNOWINGLY, VOLUNTARILY AND INTENTIONALLY WAIVE ANY RIGHT THAT ANY PARTY MAY HAVE TO TRIAL BY
JURY IN RESPECT OF ANY PROCEEDING, LITIGATION OR COUNTERCLAIM BASED 

 
ON, OR ARISING OUT OF, UNDER OR IN CONNECTION WITH THIS AGREEMENT OR ANY COURSE OF CONDUCT, COURSE OF DEALING, STATEMENTS (WHETHER VERBAL OR WRITTEN) OR ACTIONS OF ANY PARTY. 

Section 6.9    Amendment; Waiver. This Agreement may not be amended or modified, except by an instrument in
writing signed on behalf of each of the parties hereto; provided, further, that no provision of this Agreement may be amended or waived without the prior consent of the Conflicts Committee (which consent, subject to the Conflicts
Committee’s duties under applicable Law and the Partnership Agreement, shall not be unreasonably withheld, delayed or conditioned). Each party may waive any right of such party hereunder by an instrument in writing signed by such party and
delivered to the party benefiting from such waiver. 
 Section 6.10    Amendment and/or Waiver of Merger
Agreement. The parties hereto agree that neither the Parent Parties nor the Partnership Parties will agree to (i) amend or modify the Merger Agreement in any way that materially adversely affects the Unitholder unless the Unitholder
consents in writing to such amendment or modification, or (ii) waive any right of such party under the Merger Agreement in any way that materially adversely affects the Unitholder unless the Unitholder consents in writing to such waiver. For
the avoidance of doubt, the parties agree that without limiting the prior sentence, any amendment or modification of, or the waiver of rights under, Sections 2.1(a), 2.1(b), 5.1(b)(but only if such amendment or modification further restricts the
conduct of the Partnership or its Subsidiaries business), 5.8, 5.11, 5.14, 5.18, 6.1, 6.2, 7.1, 7.2, 7.3, 8.13 or 8.14 of the Merger Agreement shall be deemed to materially adversely affect the Unitholder. 

Section 6.11    Remedies. The parties hereto agree that money damages would not be a sufficient remedy for any
breach of this Agreement and that irreparable damage would occur in the event that any of the provisions of this Agreement were not performed in accordance with their specific terms or were otherwise breached. It is hereby agreed that, prior to the
valid termination of this Agreement pursuant to Section 6.1, the parties hereto shall be entitled to specific performance and injunctive or other equitable relief as a remedy for any such breach, to prevent breaches of this
Agreement, and to specifically enforce compliance with this Agreement. In connection with any request for specific performance or equitable relief, each of the parties hereto hereby waives any requirement for the security or posting of any bond in
connection with such remedy. Such remedy shall not be deemed to be the exclusive remedy for breach of this Agreement but shall be in addition to all other remedies available at law or equity to such party. The parties further agree that, by seeking
the remedies provided for in this Section 6.11, no party hereto shall in any respect waive its right to seek any other form of relief that may be available to it (i) under this Agreement, including monetary damages in
the event that this Agreement has been terminated or in the event that the remedies provided for in this Section 6.11 are not available or otherwise are not granted, or (ii) under the Merger Agreement. 

Section 6.12    Unitholder Capacity. Notwithstanding anything contained in this Agreement to the contrary, the
representations, warranties, covenants and agreements made herein by the Unitholder are made solely with respect to such Unitholder and the Covered Units and the GP LLC Interests. The Unitholder is entering into this Agreement solely in its capacity
as the owner, directly or indirectly, of such Covered Units and GP LLC Interests and nothing herein shall (a) limit or affect any actions or omissions by the Unitholder in any other capacity, (b) be construed

 
to prohibit, limit or restrict any actions or omissions by any affiliate or direct or indirect owner of the Unitholder, or any of its or their respective officers, directors, managers,
representatives or employees, in each case, not acting as such on behalf of the Unitholder, including exercising rights under the Merger Agreement or (c) be construed to prohibit, limit or restrict any of the Unitholder’s direct or
indirect owners or affiliates, or any of its or their respective officers, directors, managers, representatives or employees, from exercising its fiduciary duties, if any, to the limited partners of the Partnership under applicable Law. 

Section 6.13    Non-Recourse. No past, present or future director,
officer, employee, incorporator, member, partner, stockholder, trustee, beneficiary, settlor, agent, attorney, representative or affiliate of the Unitholder shall have any liability (whether in contract or in tort) for any obligations or liabilities
of the Unitholder arising under, in connection with or related to this Agreement or for any claim based on, in respect of, or by reason of, the transactions contemplated hereby; provided that notwithstanding the foregoing the Unitholder shall remain
responsible for all obligations or liabilities of the Unitholder arising under, in connection with or related to this Agreement or for any claim based on, in respect of, or by reason of, the transactions contemplated hereby. 

Section 6.14    Severability. To the fullest extent permitted by law, any term or provision of this Agreement,
or the application thereof, that is invalid or unenforceable in any situation in any jurisdiction shall not affect the validity or enforceability of the remaining terms and provisions hereof or the validity or enforceability of the offending term or
provision in any other situation or in any other jurisdiction. If the final judgment of a court of competent jurisdiction declares that any term or provision hereof is illegal, void, invalid or unenforceable, the parties hereto agree that the court
making such determination shall have the power to limit the term or provision, to delete specific words or phrases, or to replace any illegal, void, invalid or unenforceable term or provision with a term or provision that is legal, valid and
enforceable and that comes closest to expressing the intention of the illegal, void, invalid or unenforceable term or provision, and this Agreement shall be enforceable as so modified. To the fullest extent permitted by law, in the event such court
does not exercise the power granted to it in the prior sentence, the parties hereto shall replace such illegal, void, invalid or unenforceable term or provision with a legal, valid and enforceable term or provision that will achieve, to the extent
possible, the original economic, business and other purposes of such illegal, void, invalid or unenforceable term as closely as possible in an acceptable manner in order that the transactions contemplated hereby be consummated as originally
contemplated to the fullest extent possible. 
 Section 6.15    Expenses. Except as otherwise expressly
provided herein or in the Merger Agreement, all costs and expenses incurred in connection with this Agreement and the actions contemplated hereby shall be paid by the party incurring such expenses, whether or not the Mergers are consummated. 

Section 6.16    Successors and Assigns; Third Party Beneficiaries. 

(a)    Except in connection with a Permitted Transfer, neither this Agreement nor any of the rights, interests or
obligations hereunder shall be assigned by any of the parties hereto (whether by operation of Law or otherwise) without the prior written consent of the other parties hereto; provided, however, that Parent, Merger Sub and
GP Merger Sub may transfer or assign their rights 

 
and obligations under this Agreement, in whole or in part or from time to time in part, to one or more of their affiliates to which their rights are assigned pursuant to the terms of the Merger
Agreement at any time. Any assignment in violation of the foregoing shall be null and void. Subject to the preceding two sentences, this Agreement will be binding upon, inure to the benefit of and be enforceable by the parties and their respective
successors and assigns. 
 (b)    This Agreement is not intended to and shall not confer upon any person (other than the
parties hereto) any rights or remedies hereunder. 
 [Signature pages follow.] 

 IN WITNESS WHEREOF, each of the parties hereto has caused this Agreement to be executed as
of the date first written above by their respective officers thereunto duly authorized. 
  

			
	UNITHOLDER
	
	CENTERPOINT ENERGY, INC.

 
			
		
	By:	 	 /s/ Jason P. Wells

	Name: Jason P. Wells
	Title: Executive Vice President and Chief Financial Officer

 [Signature Page to Support Agreement] 

 IN WITNESS WHEREOF, each of the parties hereto has caused this Agreement to be executed as of the date first
written above by their respective officers thereunto duly authorized. 
  

			
	PARTNERSHIP PARTIES
	
	ENABLE MIDSTREAM PARTNERS, LP
		
	By:	 	ENABLE GP, LLC, its general partner
		
	By:	 	 /s/ Rodney J. Sailor

		 	Name: Rodney J. Sailor
		 	Title: President and Chief Executive Officer
	
	ENABLE GP, LLC
		
	By:	 	 /s/ Rodney J. Sailor

		 	Name: Rodney J. Sailor
		 	Title: President and Chief Executive Officer

 [Signature Page to Support Agreement] 

 IN WITNESS WHEREOF, each of the parties hereto has caused this Agreement to be executed as of the date first
written above by their respective officers thereunto duly authorized. 
  

			
	PARENT PARTIES
	
	ENERGY TRANSFER LP
		
	By:	 	LE GP, LLC, its general partner
		
	By:	 	 /s/ Thomas E. Long

		 	Name: Thomas E. Long
		 	Title: Co-Chief Executive Officer
	
	ELK MERGER SUB LLC
		
	By:	 	 /s/ Thomas E. Long

		 	Name: Thomas E. Long
		 	Title: Co-Chief Executive Officer
	
	ELK GP MERGER SUB LLC
		
	By:	 	 /s/ Thomas E. Long

		 	Name: Thomas E. Long
		 	Title: Co-Chief Executive Officer

 [Signature Page to Support Agreement]EX-10.2

 Exhibit 10.2 

EXECUTION VERSION 

SUPPORT AGREEMENT 
 THIS
SUPPORT AGREEMENT, dated as of February 16, 2021 (this “Agreement”), is entered into by and among Energy Transfer LP, a Delaware limited partnership (“Parent”), Elk Merger Sub LLC, a Delaware limited liability
company and a wholly owned subsidiary of Parent (“Merger Sub”), Elk GP Merger Sub LLC, a Delaware limited liability company and a wholly owned subsidiary of Parent (“GP Merger Sub” and, together with Parent and
Merger Sub, the “Parent Parties”), Enable Midstream Partners, LP, a Delaware limited partnership (the “Partnership”), and Enable GP, LLC, a Delaware limited liability company and the general partner of the
Partnership (the “General Partner” and, together with the Partnership, the “Partnership Parties”), and OGE Energy Corp., an Oklahoma corporation (the “Unitholder”). 

RECITALS: 

WHEREAS, concurrently with the execution of this Agreement, the Parent Parties and the Partnership Parties are entering into an
Agreement and Plan of Merger (as it may be amended, supplemented, restated or otherwise modified from time to time, the “Merger Agreement”), pursuant to which, among other things, (a) Merger Sub will merge with and into the
Partnership, with the Partnership surviving the Merger as a wholly owned subsidiary of Parent (the “LP Merger”), and (b) GP Merger Sub will merge with and into the General Partner, with the General Partner surviving the GP
Merger as a wholly owned subsidiary of Parent (the “GP Merger” and together with the LP Merger, the “Mergers”); 

WHEREAS, as of the date hereof, Unitholder either directly or through one of its wholly owned Subsidiaries is the record and beneficial
owner of, and has the right to vote and dispose of (i) 110,982,805 common units representing limited partner interests in the Partnership (the “Partnership Common Units”), which represent approximately 25.5% of the issued and
outstanding Partnership Common Units and (ii) 600 economic units and 500 management units, representing a 60% economic interest and 50% management interest, respectively, in the General Partner (collectively, the “GP LLC
Interests”). 
 WHEREAS, as of the date hereof, the General Partner is the record and beneficial owner of all of the general
partner interest in the Partnership and all of the incentive distribution rights in the Partnership; and 
 WHEREAS, as a material
inducement to the Parent Parties to enter into the Merger Agreement, the Parent Parties have required Unitholder to agree, and Unitholder has agreed, to enter into this agreement and abide by the covenants and obligations set forth herein with
respect to the Covered Units (as hereinafter defined) and the GP LLC Interests. 
 NOW THEREFORE, in consideration of the foregoing
and the mutual representations, warranties, covenants and agreements herein contained, and intending to be legally bound hereby, the parties hereto agree as follows: 

 ARTICLE 1 

GENERAL 

Section 1.1    Defined Terms. The following capitalized terms, as used in this Agreement, shall have the
meanings set forth below. Capitalized terms used but not otherwise defined herein shall have the meanings ascribed thereto in the Merger Agreement. 

“Covered Units” means the Existing Units, together with any Partnership Common Units that Unitholder or OGE Enogex Holdings
LLC (“Ox Holdings”) acquires, either beneficially or of record, on or after the date of this Agreement, including any Partnership Common Units received as distributions, as a result of a split, reverse split, combination, merger,
consolidation, reorganization, reclassification, recapitalization or similar transaction or upon exercise of any option, warrant or other security or instrument exercisable, convertible or exchangeable into Partnership Common Units. 

“Existing Units” means all Partnership Common Units owned, either beneficially or of record, by Unitholder or Ox Holdings on
the date of this Agreement. 
 “Partnership Entity” means each of the Partnership and its Subsidiaries. 

“Permitted Transfer” means a Transfer of Covered Units by Unitholder or Ox Holdings (or an affiliate thereof) to an affiliate
of Unitholder or Ox Holdings or in connection with a bona fide pledge or financing arrangement, provided that such transferee affiliate, pledgee or financing source, as the case may be, agrees in writing to assume all of
Unitholder’s or Ox Holdings’ obligations hereunder in respect of the Covered Units subject to such Transfer and to be bound by, and comply with, the terms of this Agreement, with respect to the Covered Units subject to such Transfer, and
all other Covered Units owned beneficially or of record from time to time by such transferee affiliate, to the same extent as Unitholder or Ox Holdings is bound hereunder (in the case of a pledgee or financing source, solely if and to the extent
such pledgee or financing source actually obtains beneficial ownership of such Covered Units). 
 “Transfer” means,
directly or indirectly, to sell, transfer, assign or otherwise dispose of (whether by merger or consolidation (including by conversion into securities or other consideration as a result of such merger or consolidation), by tendering into any tender
or exchange offer, by testamentary disposition, by operation of law or otherwise), either voluntarily or involuntarily, or to enter into any contract, option or other arrangement or understanding with respect to the voting of or sale, transfer,
conversion, assignment or other disposition of (whether by merger or consolidation) including by conversion into securities or other consideration as a result of such merger or consolidation), by tendering into any tender or exchange offer, by
testamentary disposition, by operation of law or otherwise). 
 ARTICLE 2 

VOTING 

Section 2.1    Agreement to Vote Partnership Common Units. Unitholder hereby irrevocably agrees that promptly
following the time when the Form S-4 has been declared effective by the SEC under the Securities Act (and in any case, within 24 hours of the time the Form S-4 is
declared effective) and Unitholder has received from Parent a copy of the Consent Solicitation 

  
 2 

 
Statement/Prospectus included therein, Unitholder shall, and to the extent applicable, shall cause Ox Holdings to, execute and deliver (or cause to be delivered) a written consent, substantially
in the form attached hereto, covering all of the Unitholder’s Covered Units that are Partnership Common Units approving each of the matters for which the Partnership is soliciting consents of the holders of Partnership Common Units in
accordance with the Merger Agreement pursuant to the Consent Solicitation Statement/Prospectus (such consent, once validly received with respect to a majority of the outstanding Partnership Common Units, the “Requisite Unitholder
Approval”). Any such written consent shall be given in accordance with such procedures relating thereto so as to ensure that it is duly counted for purposes of recording the results of such consent. During the term of this Agreement,
Unitholder shall oppose, vote against and not consent to, with respect to the Covered Units, any other action, agreement or proposal intended to, or which has the effect of or reasonably would be expected to have the effect of, impeding, delaying,
restricting, limiting or interfering with the consummation of the Mergers and the other transactions contemplated by the Merger Agreement, and the performance of Unitholder’s obligations hereunder or the obligations of the Partnership or the
General Partner under the Merger Agreement, including for the avoidance of doubt, opposing any Acquisition Proposal. 

Section 2.2    No Inconsistent Agreements. Unitholder hereby represents, covenants and agrees that, except for
this Agreement, neither Unitholder nor Ox Holdings (a) has entered into, and shall not enter into at any time while this Agreement remains in effect, any voting agreement or voting trust with respect to its Covered Units or GP LLC Interests or
(b) has granted, and shall not grant at any time while this Agreement remains in effect, a proxy, consent or power of attorney with respect to its Covered Units or GP LLC Interests (except pursuant to Section 2.3).

 Section 2.3    Proxy. In order to secure the obligations set forth herein, Unitholder hereby irrevocably
appoints Parent, or any nominee thereof, with full power of substitution and resubstitution, as its true and lawful proxy and attorney-in-fact, only in the event that
Unitholder does not comply with its obligations in Section 2.1, to vote or execute a written consent with respect to Unitholder’s Covered Units in accordance with Section 2.1. Unitholder
hereby affirms that this proxy is coupled with an interest and shall be irrevocable, except upon termination of this Agreement, and Unitholder will take such further action or execute such other instruments as may be necessary to effectuate the
intent of this proxy and hereby revokes any proxy previously granted by Unitholder with respect to any of its Covered Units. Parent may terminate this proxy at any time at its sole election by written notice provided to Unitholder. 

ARTICLE 3 

REPRESENTATIONS AND WARRANTIES 

Section 3.1    Representations and Warranties of Unitholder. Unitholder (except to the extent otherwise
provided herein) hereby represents and warrants to the Parent Parties and the Partnership as follows: 

(a)    Organization; Authorization; Validity of Agreement; Necessary Action. Unitholder has the requisite power and
authority and/or capacity to execute and deliver this Agreement and to carry out its obligations hereunder. The execution and delivery by Unitholder of this Agreement and the performance by Unitholder of its obligations hereunder have been duly and
validly authorized by Unitholder and no other actions or proceedings are required on the part 

  
 3 

 
of Unitholder to authorize the execution and delivery of this Agreement or the performance by Unitholder of its obligations hereunder. This Agreement has been duly executed and delivered by
Unitholder and, assuming the due authorization, execution and delivery of this Agreement by the Parent Parties and the Partnership Parties, constitutes a legal, valid and binding agreement of Unitholder, enforceable against Unitholder in accordance
with its terms, subject to bankruptcy, insolvency, fraudulent transfer, reorganization, moratorium and similar laws of general applicability relating to or affecting creditors’ rights and to general equitable principles. 

(b)    Ownership. Ox Holdings is the record and beneficial owner of, and has good and valid title to, the Existing
Units and the GP LLC Interests, free and clear of any Liens, except as may be provided for in this Agreement. Unitholder owns directly all of the issued and outstanding capital stock of Ox Energy Holdings, Inc. which owns all of the limited
liability company interests in Ox Holdings. During the term of this Agreement, the Covered Units and the GP LLC Interests will be beneficially and legally owned by Unitholder, except in the case of a Permitted Transfer of any Covered Units (in which
case this representation shall, with respect to such Covered Units, be made by the transferee of such Covered Units). Except as provided for in this Agreement, Unitholder, directly or indirectly, has and will have at all times during the term of
this Agreement sole voting power (including the right to control such vote as contemplated herein), sole power of disposition, sole power to issue instructions with respect to the matters set forth in Article 2, and sole
power to agree to all of the matters set forth in this Agreement, in each case with respect to all of the Covered Units and the GP LLC Interests at any time during the term of this Agreement, except in the case of a Permitted Transfer of Covered
Units (in which case this representation shall, with respect to the Covered Units subject to such Transfer, be made by the transferee of such Covered Units). Except for the Existing Units, Unitholder does not, directly or indirectly, legally or
beneficially own or have any option, warrant or other right to acquire any securities of a Partnership Entity that are or may by their terms become entitled to vote or any securities that are convertible or exchangeable into or exercisable for any
securities of a Partnership Entity that are or may by their terms become entitled to vote, nor is Unitholder subject to any contract, agreement, arrangement, understanding or relationship, other than this Agreement, that obligates it to vote,
acquire or dispose of any securities of a Partnership Entity or the GP LLC Interests. The Unitholder has caused Ox Holdings to consent with respect to all of its GP LLC Interests to the Merger Agreement and the GP Merger. 

(c)    No Violation. Neither the execution and delivery of this Agreement by Unitholder nor its performance of its
obligations under this Agreement will (i) result in a violation or breach of, or conflict with any provisions of, or constitute a default (or an event which, with notice or lapse of time or both, would constitute a default) under, or result in
the termination or cancellation of, or give rise to a right of purchase under, or result in the creation of any Lien (other than under this Agreement) upon any of the properties, rights or assets (including but not limited to the Existing Units)
owned by Unitholder under, any of the terms, conditions or provisions of any note, bond, mortgage, indenture, deed of trust, license, contract, lease, agreement or other instrument or obligation of any kind to which Unitholder is a party or by which
it or any of its properties, rights or assets may be bound, (ii) violate any Law applicable to Unitholder or any of its properties, rights or assets, or (iii) result in a violation or breach of or conflict with its organizational and
governing documents, except in the case of clauses (i) and (ii) as would not reasonably be expected to prevent or materially delay the ability of Unitholder to perform its obligations hereunder. 

  
 4 

 (d)    Consents and Approvals. No consent, approval, order or
authorization of, or registration, declaration or filing with, any Governmental Entity is necessary to be obtained or made by Unitholder in connection with its execution, delivery and performance of this Agreement, except for any reports under the
Exchange Act as may be required in connection with this Agreement and the transactions contemplated hereby. 

(e)    Reliance by Parent Parties and the Partnership Parties. Unitholder understands and acknowledges that the
Parent Parties and the Partnership Parties are entering into the Merger Agreement in reliance upon Unitholder’s execution and delivery of this Agreement and the representations, warranties, covenants and obligations of Unitholder contained
herein. 
 (f)    Adequate Information. Unitholder acknowledges that it is a sophisticated party with respect to
the Covered Units and has adequate information concerning the business and financial condition of the Partnership to make an informed decision regarding the transactions contemplated by this Agreement and has, independently and without reliance upon
any of the Parent Parties and based on such information as Unitholder has deemed appropriate, made its own analysis and decision to enter into this Agreement. Unitholder acknowledges that no Parent Party has made or is making any representation or
warranty, whether express or implied, of any kind or character except as expressly set forth in this Agreement or in the Merger Agreement. 

Section 3.2    Representations and Warranties of Parent Parties. Each of the Parent Parties hereby represents
and warrants to Unitholder and the Partnership Parties that the execution and delivery of this Agreement by each of the Parent Parties and the consummation of the transactions contemplated hereby have been duly and validly authorized by all
necessary action on the part of the board of directors of Parent GP. The Parent Parties acknowledge that neither Unitholder nor the Partnership Parties have made and Unitholder and the Partnership Parties are not making any representation or
warranty of any kind except as expressly set forth in this Agreement. 
 Section 3.3    Representations and
Warranties of the Partnership Parties. Each of the Partnership Parties hereby represents and warrants to Unitholder and the Parent Parties that the execution and delivery of this Agreement by the Partnership Parties and the consummation of the
transactions contemplated hereby have been duly and validly authorized by all necessary action on the part of the board of directors of the General Partner on behalf of the Partnership and the General Partner. Each of the Partnership Parties
acknowledges that neither Unitholder nor the Parent Parties have made and Unitholder and the Parent Parties are not making any representation or warranty of any kind except as expressly set forth in this Agreement. 

ARTICLE 4 
 OTHER
COVENANTS 
 Section 4.1    Prohibition on Transfers, Other Actions. 

(a)    Until the termination of this Agreement in accordance with Section 6.1, and except for a
Permitted Transfer, Unitholder hereby agrees not to, and agrees not to permit Ox Holdings to, Transfer any of the Covered Units or GP LLC Interests, beneficial ownership thereof or any other interest therein. Any purported Transfer not in compliance
with this Section 4.1(a) shall be void ab initio. 

  
 5 

 (b)    Unitholder agrees that if it or Ox Holdings attempts to Transfer
(other than a Permitted Transfer), vote or provide any other person with the authority to vote any of the Covered Units or GP LLC Interests other than in compliance with this Agreement, Unitholder unconditionally and irrevocably (during the term of
this Agreement) instructs the Partnership and the General Partner to not, (i) permit any such Transfer on its books and records, (ii) issue a book-entry interest or a new certificate representing any of the Covered Units or GP LLC
Interests or (iii) record such vote unless and until Unitholder has complied in all respects with the terms of this Agreement. 

Section 4.2    Further Assurances. Each of the parties hereto agrees that it will use its reasonable best
efforts to do all things reasonably necessary to effectuate this Agreement. 
 Section 4.3    Tax
Matters.
 (a)    Unitholder shall deliver to Vinson & Elkins a duly executed certificate
containing such representations as shall be reasonably requested to enable Vinson & Elkins to render the opinion of counsel referred to in Section 6.2(e) of the Merger Agreement and shall provide such other information as reasonably
requested by Vinson & Elkins for purposes of rendering such opinion. 
 (b)    For U.S. federal
(and applicable state and local) income tax purposes, Unitholder hereby agrees to treat and report the Mergers consistently with the Intended Tax Treatment. 

(c)    Each of the Partnership and the General Partner hereby agrees not to waive the Closing condition set
forth in Section 6.2(e) of the Merger Agreement without the express prior written consent of Unitholder.
 ARTICLE 5 

NO SOLICITATION 

Section 5.1    No Solicitation. Prior to the termination of this Agreement, Unitholder shall not, and shall
use its reasonable best efforts to cause its officers, employees, legal counsel, financial advisors, agents and other representatives (collectively, “Representatives”) not to (a) solicit, initiate, knowingly encourage or
knowingly facilitate any Acquisition Proposal or any inquiries regarding the submission of any Acquisition Proposal or any inquiries regarding any Transfer of GP LLC Interests, (b) engage or participate in any discussions or negotiations
regarding, or furnish any third party any confidential information regarding, the Partnership or its Subsidiaries in response to or in connection with any Acquisition Proposal or any Transfer of GP LLC Interests or (c) enter into any agreement
with respect to any Acquisition Proposal or Transfer of GP LLC Interests or approve or resolve to approve any Acquisition Proposal or any Transfer of GP LLC Interests. Unitholder shall, and shall use its reasonable best efforts to cause its
Representatives to, immediately cease and cause to be terminated all existing discussions or negotiations with any third party conducted prior to the date of this Agreement with respect to any Acquisition Proposal. In addition, for purposes of this
Agreement, the Partnership shall not be deemed an affiliate of Unitholder, and any officer, director, employee, agent or advisor of the Partnership (in each case, in their capacities as such), shall not be deemed a Representative of Unitholder. 

  
 6 

 ARTICLE 6 

MISCELLANEOUS 

Section 6.1    Termination. This Agreement shall remain in effect until the earlier to occur of (a) the
Effective Time and (b) the valid termination of the Merger Agreement in accordance with its terms (including after any extension thereof), in which case this Agreement shall terminate and be of no further force and effect with respect to all
parties hereto. Nothing in this Section 6.1 and no termination of this Agreement shall relieve or otherwise limit any party of liability for any breach of this Agreement occurring prior to such termination. 

Section 6.2    No Ownership Interest. Nothing contained in this Agreement shall be deemed to vest in any
Parent Party any direct or indirect ownership or incidence of ownership of or with respect to any Covered Units. All rights, ownership and economic benefit relating to the Covered Units shall remain vested in and belong to Unitholder, and Parent
shall have no authority to direct Unitholder in the voting or disposition of any of the Covered Units, except as otherwise provided herein. 

Section 6.3    Publicity. Unitholder hereby permits Parent and the Partnership to include and disclose in the
Consent Solicitation Statement/Prospectus, and in such other schedules, certificates, applications, agreements or documents as such entities reasonably determine to be necessary or appropriate in connection with the consummation of the Mergers and
the transactions contemplated by the Merger Agreement Unitholder’s identity and ownership of the Covered Units, and the nature of Unitholder’s commitments, arrangements and understandings pursuant to this Agreement. Parent and the
Partnership hereby permit Unitholder to disclose this Agreement and the transactions contemplated by the Merger Agreement in any reports required to be filed by Unitholder or any of its affiliates under the Exchange Act. 

Section 6.4    Notices. All notices and other communications hereunder shall be in writing and shall be deemed
given when delivered personally or by facsimile or email (upon telephonic confirmation of receipt) or on the first business day following the date of dispatch if delivered by a recognized next day courier service. All notices hereunder shall be
delivered as set forth below or pursuant to such other instructions as may be designated in writing by the party to receive such notice: 

If to Parent, Merger Sub or GP Merger Sub, to: 

Energy Transfer LP 
 8111
Westchester Drive, Suite 700 
 Dallas, Texas 75225 

	 	Attention:	 Thomas P. Mason 

	 	Email:	 Tom.Mason@energytransfer.com 

with copies to: 

Latham & Watkins LLP 

811 Main Street, Suite 3700 

Houston, Texas 77002 

  
 7 

	 	Facsimile:	 (713) 546-7401 

	 	Attention:	 William N. Finnegan IV 

	 	    	 Kevin M. Richardson 

	 	Email:	 bill.finnegan@lw.com 

	 	    	 kevin.richardson@lw.com 

If to Unitholder, to: 
 OGE
Energy Corp. 
 P.O. Box 321, MC 1106 

Oklahoma City, OK 73101 

Overnight address: 
 321 N. HARVEY

 Oklahoma City, OK 73101 

Facsimile: 
 Attention: W. Bryan
Buckler, CFO 
 Email: bucklewb@oge.com 

with copies to: 
 OGE Energy
Corp. 
 P.O. Box 321, MC 1105 

Oklahoma City, OK 73101 

Overnight address: 
 321 N. HARVEY

 Oklahoma City, OK 73101 

Facsimile: 
 Attention: William
Sultemeier, General Counsel 
 Email: sultemwh@oge.com 

and: 
 Jones Day 

717 Texas Ave, Suite 3300 

Houston, TX 77002 
 Facsimile:
(832) 239-3600 
 Attention: Jeff Schlegel 

Email: jaschlegel@jonesday.com 

If to the Partnership or the General Partner, to: 

Enable Midstream Partners, LP 

499 West Sheridan Avenue, Suite 1500 

Oklahoma City, Oklahoma 

Facsimile: 346-701-2918 

Attention: Mark C. Schroeder 

Email:      mark.schroeder@enablemidstream.com 

  
 8 

 with copies to: 

Vinson & Elkins L.L.P. 

1001 Fannin Street, Suite 2500 

Houston, Texas 77002 

	 	Facsimile:	 713-615-5956

	 	Attention:	 David P. Oelman 

	 	 	 Stephen M. Gill 

	 	 	 Scott D. Rubinsky 

	 	Email:	 doelman@velaw.com 

	 	 	 sgill@velaw.com 

	 	 	 srubinsky@velaw.com 

Section 6.5    Interpretation. The words “hereof,” “herein” and “hereunder” and
words of similar import when used in this Agreement shall refer to this Agreement as a whole and not to any particular provision of this Agreement, and Section references are to this Agreement unless otherwise specified. Whenever the words
“include,” “includes” or “including” are used in this Agreement, they shall be deemed to be followed by the words “without limitation.” The meanings given to terms defined herein shall be equally applicable to
both the singular and plural forms of such terms. The headings contained in this Agreement are for reference purposes only and shall not affect in any way the meaning or interpretation of this Agreement. This Agreement is the product of negotiation
by the parties having the assistance of counsel and other advisers. It is the intention of the parties that this Agreement not be construed more strictly with regard to one party than with regard to the others. 

Section 6.6    Counterparts. This Agreement may be executed in two or more counterparts, each of which shall
be an original, with the same effect as if the signatures thereto and hereto were upon the same instrument, and shall become effective when one or more counterparts have been signed by each of the parties and delivered (by telecopy, electronic
delivery or otherwise) to the other parties. Signatures to this Agreement transmitted by facsimile transmission, by electronic mail in “portable document format” (“.pdf”) form, or by any other electronic means intended to
preserve the original graphic and pictorial appearance of a document, will have the same effect as physical delivery of the paper document bearing the original signature. 

Section 6.7    Entire Agreement. This Agreement and, solely to the extent of the defined terms referenced
herein, the Merger Agreement, embody the complete agreement and understanding among the parties hereto with respect to the subject matter hereof and supersede and preempt any prior understandings, agreements or representations by or among the
parties, written and oral, that may have related to the subject matter hereof in any way. 

Section 6.8    Governing Law; Consent to Jurisdiction; Waiver of Jury Trial. 

(a)    THIS AGREEMENT AND THE AGREEMENTS, INSTRUMENTS AND DOCUMENTS CONTEMPLATED HEREBY AND ALL DISPUTES BETWEEN THE
PARTIES UNDER OR RELATING TO THIS AGREEMENT OR THE FACTS AND CIRCUMSTANCES LEADING TO ITS EXECUTION, WHETHER IN CONTRACT, TORT OR OTHERWISE, SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH 

  
 9 

 
THE LAWS OF THE STATE OF DELAWARE (WITHOUT REFERENCE TO SUCH STATE’S PRINCIPLES OF CONFLICTS OF LAW). THE DELAWARE COURT OF CHANCERY (AND IF THE DELAWARE COURT OF CHANCERY SHALL BE
UNAVAILABLE, ANY DELAWARE STATE COURT AND THE FEDERAL COURT OF THE UNITED STATES OF AMERICA SITTING IN THE STATE OF DELAWARE) WILL HAVE EXCLUSIVE JURISDICTION OVER ANY AND ALL DISPUTES BETWEEN THE PARTIES HERETO, WHETHER IN LAW OR EQUITY, BASED
UPON, ARISING OUT OF OR RELATING TO THIS AGREEMENT AND THE AGREEMENTS, INSTRUMENTS AND DOCUMENTS CONTEMPLATED HEREBY OR THE FACTS AND CIRCUMSTANCES LEADING TO ITS EXECUTION, WHETHER IN CONTRACT, TORT OR OTHERWISE. EACH OF THE PARTIES IRREVOCABLY
CONSENTS TO AND AGREES TO SUBMIT TO THE EXCLUSIVE JURISDICTION OF SUCH COURTS IN ANY SUCH DISPUTE, IRREVOCABLY CONSENTS TO THE SERVICE OF THE SUMMONS AND COMPLAINT AND ANY OTHER PROCESS IN ANY OTHER ACTION OR PROCEEDING RELATING TO THE TRANSACTIONS
CONTEMPLATED BY THIS AGREEMENT, ON BEHALF OF ITSELF OR ITS PROPERTY, BY DELIVERY IN ANY METHOD CONTEMPLATED BY SECTION 6.4 OR IN ANY OTHER MANNER AUTHORIZED BY LAW, AND HEREBY WAIVES, AND AGREES NOT TO ASSERT IN ANY SUCH
DISPUTE, TO THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW, ANY CLAIM THAT (i) SUCH PARTY IS NOT PERSONALLY SUBJECT TO THE JURISDICTION OF SUCH COURTS, (ii) SUCH PARTY AND SUCH PARTY’S PROPERTY IS IMMUNE FROM ANY LEGAL PROCESS ISSUED
BY SUCH COURTS OR (iii) ANY LITIGATION COMMENCED IN SUCH COURTS IS BROUGHT IN AN INCONVENIENT FORUM. 
 (b)    THE
PARTIES HEREBY KNOWINGLY, VOLUNTARILY AND INTENTIONALLY WAIVE ANY RIGHT THAT ANY PARTY MAY HAVE TO TRIAL BY JURY IN RESPECT OF ANY PROCEEDING, LITIGATION OR COUNTERCLAIM BASED ON, OR ARISING OUT OF, UNDER OR IN CONNECTION WITH THIS AGREEMENT OR ANY
COURSE OF CONDUCT, COURSE OF DEALING, STATEMENTS (WHETHER VERBAL OR WRITTEN) OR ACTIONS OF ANY PARTY. 

Section 6.9    Amendment; Waiver. This Agreement may not be amended or modified, except by an instrument in
writing signed on behalf of each of the parties hereto; provided, further, that no provision of this Agreement may be amended or waived without the prior consent of the Conflicts Committee (which consent, subject to the Conflicts
Committee’s duties under applicable Law and the Partnership Agreement, shall not be unreasonably withheld, delayed or conditioned). Each party may waive any right of such party hereunder by an instrument in writing signed by such party and
delivered to the party benefiting from such waiver. 
 Section 6.10    Amendment and/or Waiver of Merger
Agreement. The parties hereto agree that neither the Parent Parties nor the Partnership Parties will agree to (i) amend or modify the Merger Agreement in any way that materially adversely affects the Unitholder unless the Unitholder
consents in writing to such amendment or modification, or (ii) waive any right of such party under the Merger Agreement in any way that materially adversely affects the Unitholder unless the Unitholder consents in writing to such waiver. For
the avoidance of doubt, the parties agree that without limiting the prior sentence, any amendment or modification of, or the waiver of rights under, Sections 2.1(a), 2.1(b), 5.1(b)(but only if such amendment or modification further

  
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restricts the conduct of the Partnership or its Subsidiaries business), 5.8, 5.11, 5.14, 5.18, 6.1, 6.2, 7.1, 7.2, 7.3, 8.13 or 8.14 of the Merger Agreement shall be deemed to materially
adversely affect the Unitholder. 
 Section 6.11    Remedies. The parties hereto agree that money damages
would not be a sufficient remedy for any breach of this Agreement and that irreparable damage would occur in the event that any of the provisions of this Agreement were not performed in accordance with their specific terms or were otherwise
breached. It is hereby agreed that, prior to the valid termination of this Agreement pursuant to Section 6.1, the parties hereto shall be entitled to specific performance and injunctive or other equitable relief as a remedy
for any such breach, to prevent breaches of this Agreement, and to specifically enforce compliance with this Agreement. In connection with any request for specific performance or equitable relief, each of the parties hereto hereby waives any
requirement for the security or posting of any bond in connection with such remedy. Such remedy shall not be deemed to be the exclusive remedy for breach of this Agreement but shall be in addition to all other remedies available at law or equity to
such party. The parties further agree that, by seeking the remedies provided for in this Section 6.11, no party hereto shall in any respect waive its right to seek any other form of relief that may be available to it
(i) under this Agreement, including monetary damages in the event that this Agreement has been terminated or in the event that the remedies provided for in this Section 6.11 are not available or otherwise are not
granted, or (ii) under the Merger Agreement. 
 Section 6.12    Unitholder Capacity. Notwithstanding
anything contained in this Agreement to the contrary, the representations, warranties, covenants and agreements made herein by the Unitholder are made solely with respect to such Unitholder and the Covered Units and the GP LLC Interests. The
Unitholder is entering into this Agreement solely in its capacity as the owner, directly or indirectly, of such Covered Units and GP LLC Interests and nothing herein shall (a) limit or affect any actions or omissions by the Unitholder in any
other capacity, (b) be construed to prohibit, limit or restrict any actions or omissions by any affiliate or direct or indirect owner of the Unitholder, or any of its or their respective officers, directors, managers, representatives or
employees, in each case, not acting as such on behalf of the Unitholder, including exercising rights under the Merger Agreement or (c) be construed to prohibit, limit or restrict any of the Unitholder’s direct or indirect owners or
affiliates, or any of its or their respective officers, directors, managers, representatives or employees, from exercising its fiduciary duties, if any, to the limited partners of the Partnership under applicable Law. 

Section 6.13    Non-Recourse. No past, present or future director,
officer, employee, incorporator, member, partner, stockholder, trustee, beneficiary, settlor, agent, attorney, representative or affiliate of the Unitholder shall have any liability (whether in contract or in tort) for any obligations or liabilities
of the Unitholder arising under, in connection with or related to this Agreement or for any claim based on, in respect of, or by reason of, the transactions contemplated hereby; provided that notwithstanding the foregoing the Unitholder shall remain
responsible for all obligations or liabilities of the Unitholder arising under, in connection with or related to this Agreement or for any claim based on, in respect of, or by reason of, the transactions contemplated hereby. 

Section 6.14    Severability. To the fullest extent permitted by law, any term or provision of this Agreement,
or the application thereof, that is invalid or unenforceable in any situation in 

  
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any jurisdiction shall not affect the validity or enforceability of the remaining terms and provisions hereof or the validity or enforceability of the offending term or provision in any other
situation or in any other jurisdiction. If the final judgment of a court of competent jurisdiction declares that any term or provision hereof is illegal, void, invalid or unenforceable, the parties hereto agree that the court making such
determination shall have the power to limit the term or provision, to delete specific words or phrases, or to replace any illegal, void, invalid or unenforceable term or provision with a term or provision that is legal, valid and enforceable and
that comes closest to expressing the intention of the illegal, void, invalid or unenforceable term or provision, and this Agreement shall be enforceable as so modified. To the fullest extent permitted by law, in the event such court does not
exercise the power granted to it in the prior sentence, the parties hereto shall replace such illegal, void, invalid or unenforceable term or provision with a legal, valid and enforceable term or provision that will achieve, to the extent possible,
the original economic, business and other purposes of such illegal, void, invalid or unenforceable term as closely as possible in an acceptable manner in order that the transactions contemplated hereby be consummated as originally contemplated to
the fullest extent possible. 
 Section 6.15    Expenses. Except as otherwise expressly provided herein or
in the Merger Agreement, all costs and expenses incurred in connection with this Agreement and the actions contemplated hereby shall be paid by the party incurring such expenses, whether or not the Mergers are consummated. 

Section 6.16    Successors and Assigns; Third Party Beneficiaries. 

(a)    Except in connection with a Permitted Transfer, neither this Agreement nor any of the rights, interests or
obligations hereunder shall be assigned by any of the parties hereto (whether by operation of Law or otherwise) without the prior written consent of the other parties hereto; provided, however, that Parent, Merger Sub and
GP Merger Sub may transfer or assign their rights and obligations under this Agreement, in whole or in part or from time to time in part, to one or more of their affiliates to which their rights are assigned pursuant to the terms of the Merger
Agreement at any time. Any assignment in violation of the foregoing shall be null and void. Subject to the preceding two sentences, this Agreement will be binding upon, inure to the benefit of and be enforceable by the parties and their respective
successors and assigns. 
 (b)    This Agreement is not intended to and shall not confer upon any person (other than the
parties hereto) any rights or remedies hereunder. 
 [Signature pages follow.] 

  
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 IN WITNESS WHEREOF, each of the parties hereto has caused this Agreement to be executed as
of the date first written above by their respective officers thereunto duly authorized. 
  

			
	UNITHOLDER
	
	OGE ENERGY CORP.

 
			
		
	By:	 	 /s/ Sean Trauschke

			
	Name:	 	Sean Trauschke
	Title:	 	Chairman, President and Chief Executive Officer

  
 [Signature Page to
Support Agreement] 

 IN WITNESS WHEREOF, each of the parties hereto has caused this Agreement to be executed as of the date first
written above by their respective officers thereunto duly authorized. 
  

			
	PARTNERSHIP PARTIES
	
	ENABLE MIDSTREAM PARTNERS, LP
		
	By:	 	ENABLE GP, LLC, its general partner
		
	By:	 	 /s/ Rodney J. Sailor

		 	Name: Rodney J. Sailor
		 	Title: President and Chief Executive Officer
	
	ENABLE GP, LLC
		
	By:	 	 /s/ Rodney J. Sailor

		 	Name: Rodney J. Sailor
		 	Title: President and Chief Executive Officer

  
 [Signature Page to
Support Agreement] 

 IN WITNESS WHEREOF, each of the parties hereto has caused this Agreement to be executed as of the date first
written above by their respective officers thereunto duly authorized. 
  

			
	PARENT PARTIES
	
	ENERGY TRANSFER LP
		
	By:	 	LE GP, LLC, its general partner
		
	By:	 	 /s/ Thomas E. Long

		 	Name: Thomas E. Long
		 	Title: Co-Chief Executive Officer
	
	ELK MERGER SUB LLC
		
	By:	 	 /s/ Thomas E. Long

		 	Name: Thomas E. Long
		 	Title: Co-Chief Executive Officer
	
	ELK GP MERGER SUB LLC
		
	By:	 	 /s/ Thomas E. Long

		 	Name: Thomas E. Long
		 	Title: Co-Chief Executive Officer

  
 [Signature Page to
Support Agreement]

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