UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549

_____________________________________

SCHEDULE 14A

_____________________________________

Proxy Statement Pursuant to Section 14(a) of
the Securities Exchange Act of 1934

(Amendment No. )

Filed by the Registrant		☒
Filed by a Party other than the Registrant		☐

Check the appropriate box:

☐		Preliminary Proxy Statement
☐		Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))
☒		Definitive Proxy Statement
☐		Definitive Additional Materials
☐		Soliciting Material under §240.14a-12

Summit Midstream Partners, LP

(Name of Registrant as Specified In Its Charter)

______________________________________________________________
(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

Payment of Filing Fee (Check all boxes that apply):

☒		No fee required.
☐		Fee paid previously with preliminary materials.
☐		Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11.

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REORGANIZATION PROPOSED — YOUR VOTE IS VERY IMPORTANT

___________________________

Dear Unitholders of Summit Midstream Partners, LP:

The board of directors (the “GP Board”) of Summit Midstream GP, LLC (the “General Partner”), which is the general partner of Summit Midstream Partners, LP (the “Partnership”), has unanimously approved a corporate reorganization of the Partnership to convert from a master limited partnership to a C corporation (the “Corporate Reorganization”). The Corporate Reorganization is to be accomplished through a merger between the Partnership and Summit SMC NewCo, LLC (“Merger Sub”), a wholly-owned subsidiary of Summit Midstream Corporation (“New Summit”), pursuant to which all of the common units representing limited partner interests in the Partnership (“Common Units”) will be converted into the right to receive shares of common stock, par value $0.01 per share, of New Summit (“Common Stock”) and all of the 9.50% Series A Fixed-to-Floating Rate Cumulative Redeemable Perpetual Preferred Units representing limited partner interests in the Partnership (“Series A Preferred Units” and, together with the Common Units, the “Units”) will be converted into the right to receive shares of Series A Floating Rate Cumulative Redeemable Perpetual Preferred Stock, par value $0.01 per share (“Series A Preferred Stock”), of New Summit and Merger Sub will be merged with and into the Partnership (the “Merger”), with the Partnership surviving the Merger as a wholly-owned subsidiary of New Summit. The GP Board has unanimously determined that the Corporate Reorganization is advisable and in the best interests of the Partnership, its subsidiaries and the unitholders of the Partnership.

Following the Corporate Reorganization, the Partnership will be a wholly-owned subsidiary of New Summit, a newly formed Delaware corporation. Upon consummation of the Corporate Reorganization, the Common Stock is expected to be listed on the New York Stock Exchange under the symbol “SMC.”

The GP Board believes that maintaining the current master limited partnership structure is no longer in the best interests of the Partnership and that the Corporate Reorganization positions the Partnership to improve investors’ returns and attract new investors, with current and future investors preferring New Summit’s post-Corporate Reorganization structure. As a pass-through tax entity, the Partnership’s investors are ultimately responsible for the tax burden of the Partnership’s business activities. We expect that reorganizing from a pass-through tax entity to a C corporation will reduce our investor’s tax burden going forward, including by eliminating the recapture of previously allocated Partnership items. The Corporate Reorganization will also simplify the company’s structure and governance and is expected to enhance the ability of management and the board of directors of New Summit (the “New Summit Board”) to grow the business. The GP Board believes that the conversion to a C corporation will increase New Summit’s access to, and lower the cost of, capital through an expanded field of investors, as many investors are unwilling or unable to invest in pass-through entities. Additionally, the GP Board believes that the Corporate Reorganization, given the Partnership’s generation of profits and current distribution policy, will better align with investor goals of maximizing returns on, and returns of, their capital investment on an after-tax basis.

The Partnership is holding a special meeting of holders of Common Units virtually on July 18, 2024 at 2:00 p.m., Central time, via live webcast at https://web.lumiconnect.com/217371229 (password: summit2024) (the “Special Meeting”). At this meeting, holders of Common Units will be asked to approve the Agreement and Plan of Merger (the “Merger Agreement”) and to consider and vote upon, on an advisory, non-binding basis, certain governance provisions in the amended and restated certificate of incorporation and the amended and restated bylaws of New Summit in connection with the Merger. Information about the Special Meeting, the Corporate Reorganization and the New Summit Board are contained in this proxy statement/prospectus. We encourage you to read this entire proxy statement/prospectus, including the annexes, carefully. In particular, you should read the “Risk Factors” section beginning on page 28 for a description of various risks you should consider in evaluating the proposed Corporate Reorganization.

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The shares of Series A Preferred Stock that holders of Series A Preferred Units will receive upon consummation of the Corporate Reorganization have substantially similar rights, preferences and privileges as the Series A Preferred Units. The holders of Series A Preferred Units are not being asked to approve the Merger Agreement or any of the other proposals being presented to holders of Common Units, as contemplated by the Fourth Amended and Restated Agreement of Limited Partnership of the Partnership, dated as of May 28, 2020.

The GP Board has unanimously determined that the Merger Agreement and the Merger are advisable and in the best interests of the Partnership and the unitholders of the Partnership and has unanimously approved and adopted the Merger Agreement and unanimously approved the Merger. The GP Board unanimously recommends that the holders of Common Units vote FOR the approval of the Merger Agreement and FOR the advisory, non-binding votes on certain governance provisions.

EVERY VOTE IS IMPORTANT. Whether or not you plan to attend the Special Meeting, please take the time to vote by following the instructions on your proxy card as soon as possible. If your Common Units are held in “street name,” please instruct your broker or bank how to vote your Common Units.

We appreciate your investment in the Partnership and look forward to your participation at the Special Meeting.

		Sincerely,
		/s/ J. Heath Deneke
		J. Heath Deneke Chairman of the Board, President and Chief Executive Officer of Summit Midstream GP, LLC

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of the securities to be issued under this proxy statement/prospectus or has determined if this document is truthful or complete. Any representation to the contrary is a criminal offense.

This proxy statement/prospectus is dated June 14, 2024 and is being first mailed to holders of Common Units on or about June 14, 2024.

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Houston, Texas
June 14, 2024

Summit Midstream Partners, LP
910 Louisiana Street, Suite 4200
Houston, Texas 77002

NOTICE OF SPECIAL MEETING OF UNITHOLDERS

To the Unitholders of Summit Midstream Partners, LP:

A special meeting (the “Special Meeting”) of holders of common units (“Common Units”) representing limited partner interests in Summit Midstream Partners, LP (the “Partnership”) will be held virtually on July 18, 2024 at 2:00 p.m., Central time, via live webcast at https://web.lumiconnect.com/217371229 (password: summit2024), for the following purposes:

• to consider and vote upon a proposal to approve the Agreement and Plan of Merger (the “Merger Agreement”), a copy of which is attached as Annex A to this proxy statement/prospectus, by and among Summit Midstream Corporation (“New Summit”), Summit SMC NewCo, LLC (the “Merger Sub”), a wholly-owned subsidiary of New Summit, the Partnership and Summit Midstream GP, LLC, the general partner of the Partnership (the “General Partner”), pursuant to which Merger Sub will be merged with and into the Partnership (the “Merger”), with the Partnership continuing as the surviving entity and a wholly-owned subsidiary of New Summit (the “Merger Proposal” and such transaction contemplated thereby, the “Corporate Reorganization”); and

• to consider and vote upon proposals to approve, on an advisory, non-binding basis, certain governance provisions in the amended and restated certificate of incorporation and amended and restated bylaws of New Summit (the “New Summit Charter” and the “New Summit Bylaws,” respectively) in connection with the Merger, which are being presented separately in accordance with guidance from the U.S. Securities and Exchange Commission to give unitholders the opportunity to present their separate views on important corporate governance provisions, as five sub-proposals (which proposals we refer to, collectively, as the “Advisory Governing Documents Proposals” and, collectively with the Merger Proposal, the “Proposals”), including:

1. A proposal to require that any action required or permitted to be taken by the stockholders of New Summit must be taken at a duly called annual or special meeting of stockholders of New Summit and may not be taken by any consent in writing by such stockholders;

2. A proposal to provide that special meetings of stockholders of New Summit may be called only by or at the direction of the board of directors of New Summit (the “New Summit Board”), the Chairman thereof or the Chief Executive Officer;

3. A proposal to provide that the New Summit Board may, without stockholder approval, authorize the issuance of preferred stock, $0.01 par value per share (“Preferred Stock”), from time to time in one or more series, and with respect to each series of Preferred Stock, fix and state by resolution the designation and the powers, preferences, rights, qualifications, limitations and restrictions relating to each series of Preferred Stock;

4. A proposal to provide that the New Summit Board may, without stockholder approval, authorize the issuance of common stock, $0.01 par value per share (“Blank Check Common Stock”), from time to time in one or more series, and with respect to each series of Blank Check Common Stock, fix and state by resolution the designation and the powers, privileges, rights, qualifications, limitations and restrictions relating to each series of Blank Check Common Stock; and

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5. A proposal to adopt the Court of Chancery of the State of Delaware (or, if and only if the Court of Chancery of the State of Delaware lacks requisite subject matter jurisdiction, any state court located within the State of Delaware or, if and only if all such state courts lack subject matter jurisdiction, the federal district court for the District of Delaware) and any appellate court therefrom as the exclusive forum for certain stockholder litigation and the federal district courts of the United States of America as the exclusive forum for resolving any complaint asserting a cause of action arising under the Securities Act of 1933, as amended, against New Summit or any director, officer, employee or agent of New Summit, unless New Summit consents in writing to the selection of an alternative forum.

A vote for the Merger Proposal is effectively a vote in favor of the Corporate Reorganization which will result in a conversion from a master limited partnership to a C corporation.

The Merger is not conditioned on the Advisory Governing Documents Proposals.

Approval of the Merger Proposal requires the affirmative vote of holders of a majority of the outstanding Common Units. Each of the Advisory Governing Documents Proposals, each of which is an advisory, non-binding vote, requires the affirmative vote of holders of a majority of the votes cast (not including abstentions and broker non-votes) by holders of the Common Units present (virtually at the Special Meeting or by proxy) and entitled to vote at the Special Meeting. Abstentions and broker non-votes (if any) will have the effect of a vote AGAINST the Merger Proposal and will not be taken into account in determining the outcome of the Advisory Governing Documents Proposals. The votes on each Proposal are separate and apart from the votes on the other Proposals. Accordingly, holders of Common Units may vote to approve certain of the Proposals and vote not to approve other Proposals. Because the votes on the Advisory Governing Documents Proposals are advisory in nature only, they will not be binding on the Partnership or New Summit.

The shares of Series A Floating Rate Cumulative Redeemable Perpetual Preferred Stock that holders of 9.50% Series A Fixed-to-Floating Rate Cumulative Redeemable Perpetual Preferred Units representing limited partner interests in the Partnership (“Series A Preferred Units”) will receive upon consummation of the Corporate Reorganization have substantially similar rights, preferences and privileges as the Series A Preferred Units. The holders of Series A Preferred Units are not being asked to approve the Merger Agreement or any of the other proposals being presented to holders of Common Units, as contemplated by the Fourth Amended and Restated Agreement of Limited Partnership of the Partnership, dated as of May 28, 2020.

We cannot complete the Corporate Reorganization unless the holders of Common Units approve the Merger Proposal. Accordingly, your vote is very important regardless of the number of Common Units you own.

The board of directors (the “GP Board”) of the General Partner has determined that the Merger is advisable and in the best interests of the Partnership, its subsidiaries and the unitholders of the Partnership; approved the Merger Agreement and the execution, delivery and performance of the Merger Agreement and the transactions contemplated thereby; and resolved to submit the Merger Agreement to a vote of the holders of Common Units and recommend approval of the Merger Agreement by the holders of Common Units. The GP Board unanimously recommends that the holders of Common Units vote FOR the Merger Proposal and FOR the Advisory Governing Documents Proposals.

For more information regarding the recommendation of the GP Board, including the obligations of the GP Board in making such determination under the Fourth Amended and Restated Agreement of Limited Partnership of the Partnership, see “The Corporate Reorganization — Recommendation of the GP Board and Reasons for the Corporate Reorganization.” In considering the recommendation of the GP Board, unitholders of the Partnership should be aware that some of the General Partner’s directors and executive officers may have interests in the Corporate Reorganization that are different from, or in addition to, the interests they may have as unitholders. See “The Corporate Reorganization — Interests of Certain Persons in the Merger.”

Only holders of record of Common Units at the close of business on June 7, 2024 are entitled to notice of and to vote at the Special Meeting. References to the Special Meeting in this proxy statement/prospectus are to such meeting as adjourned or postponed.

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YOUR VOTE IS IMPORTANT. WHETHER OR NOT YOU EXPECT TO ATTEND THE SPECIAL MEETING, PLEASE SUBMIT YOUR PROXY IN ONE OF THE FOLLOWING WAYS:

• If you hold your Common Units in the name of a bank, broker or other nominee, you should follow the instructions provided by your bank, broker or other nominee when voting your Common Units.

• If you hold your Common Units in your own name, you may submit your proxy by:

• using the Internet website shown on the proxy card; or

• marking, signing, dating and promptly returning the enclosed proxy card in the postage-paid envelope. It requires no postage if mailed in the United States.

The enclosed proxy statement/prospectus provides a detailed description of the Corporate Reorganization and the Merger Agreement. You are urged to read this proxy statement/prospectus and the Annexes carefully and in their entirety. If you have any questions concerning the Corporate Reorganization, the Merger Agreement or this proxy statement/prospectus, would like additional copies or need help voting your Common Units, please contact the Partnership’s proxy solicitor:

Morrow Sodali LLC
430 Park Avenue, 14th Floor
New York, NY 10022
Call toll-free at (800) 662-5200 (in North America)
or +1 (203) 658-9400 (outside of North America)
Email: SMLP@info.morrowsodali.com

		By order of the Board of Directors of Summit Midstream GP, LLC,
		/s/ James D. Johnston
		James D. Johnston Executive Vice President, General Counsel, Chief Compliance Officer and Secretary of Summit Midstream GP, LLC

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IMPORTANT NOTE ABOUT THIS PROXY STATEMENT/PROSPECTUS

This proxy statement/prospectus, which forms part of a registration statement on Form S-4 filed with the Securities and Exchange Commission (the “SEC”), constitutes a proxy statement of Summit Midstream Partners, LP (the “Partnership”) under Section 14(a) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), with respect to the solicitation of proxies for the special meeting of unitholders (the “Special Meeting”) to approve the Merger Proposal and the Advisory Governing Documents Proposals (each as defined herein). This proxy statement/prospectus is also a prospectus of New Summit (as defined herein) under Section 5 of the Securities Act of 1933, as amended (the “Securities Act”), for (i) the shares of New Summit common stock, par value $0.01 per share (“Common Stock”), that New Summit will issue to the holders of common units (“Common Units”) representing limited partner interests in the Partnership in the Corporate Reorganization pursuant to the Merger Agreement (each as defined herein), a copy of which is attached as Annex A to this proxy statement/prospectus, by and among the Partnership, New Summit, Merger Sub and the General Partner (each as defined herein) and (ii) the shares of Series A Floating Rate Cumulative Redeemable Perpetual Preferred Stock, par value $0.01 per share (“Series A Preferred Stock”), that New Summit will issue to the holders of 9.50% Series A Fixed-to-Floating Rate Cumulative Redeemable Perpetual Preferred Units (“Series A Preferred Units” and, together with the Common Units, the “Units”) representing limited partner interests in the Partnership in the Corporate Reorganization pursuant to the Merger Agreement.

The Partnership and New Summit have not authorized anyone to give any information or make any representation about the Corporate Reorganization, the Partnership or New Summit that is different from, or in addition to, that contained in this proxy statement/prospectus. Therefore, if anyone distributes this type of information, you should not rely on it. If you are in a jurisdiction where offers to exchange or sell, or solicitations of offers to exchange or purchase, the securities offered by this proxy statement/prospectus or the solicitation of proxies are unlawful, or you are a person to whom it is unlawful to direct these types of activities, then the offer presented in this proxy statement/prospectus does not extend to you. The information contained in this proxy statement/prospectus speaks only as of the date of this proxy statement/prospectus unless the information specifically indicates that another date applies.

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ADDITIONAL INFORMATION

This proxy statement/prospectus incorporates by reference important business and financial information about the Partnership from other documents filed with the SEC that are not included in or delivered with this document. Unitholders may read the Partnership’s SEC filings free of charge, including this proxy statement/prospectus, over the Internet at the SEC’s website at www.sec.gov.

If you would like to request documents from the Partnership, please send a request in writing or by telephone at the following addresses:

Summit Midstream GP, LLC

910 Louisiana Street, Suite 4200
Houston, Texas 77002
(832) 413-4770
Attention: Secretary

If you are a unitholder and would like to request documents, please do so by July 11, 2024, in order to receive them before the Special Meeting. The Partnership will mail any requested documents to you by first class mail, or another equally prompt means.

For additional details about where you can find information about the Partnership, please see the section titled “Where You Can Find More Information” of this proxy statement/prospectus.

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PROXY STATEMENT/PROSPECTUS

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		Page
QUESTIONS AND ANSWERS ABOUT THE CORPORATE REORGANIZATION AND THE SPECIAL MEETING		1
SUMMARY		8
The Parties		8
The Merger		9
The Merger Consideration		9
Ownership Structure Before the Corporate Reorganization		10
Ownership Structure After the Corporate Reorganization		10
Treatment of the Partnership Equity Awards		11
Special Meeting		11
Recommendation of the GP Board and Reasons for the Corporate Reorganization		11
Interests of Certain Persons in the Merger		12
New Summit’s Board of Directors and Management		12
The Merger Agreement		13
Material U.S. Federal Income Tax Consequences		15
Other Information Related to the Corporate Reorganization		16
Recent Developments		17
Summary of Risk Factors		18
SELECTED HISTORICAL CONSOLIDATED FINANCIAL DATA OF THE PARTNERSHIP		21
Non-GAAP Financial Measures		23
SUMMARY SELECTED UNAUDITED PRO FORMA CONDENSED CONSOLIDATED FINANCIAL INFORMATION		26
MARKET PRICE INFORMATION		27
RISK FACTORS		28
Risks Related to the Corporate Reorganization		28
Tax Risks Related to the Merger		30
Risks Related to Our Operations		31
Risks Related to Our Finances		41
Regulatory and Environmental Policy Risks		46
Risks Related to Terrorism and Cyberterrorism		56
Risks Related to the Common Stock and Series A Preferred Stock		57
CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING STATEMENTS		59
INFORMATION ABOUT THE PARTIES		62
THE SPECIAL MEETING		63
Time, Place and Date		63
Proposal 1 Approval of the Merger Proposal		63
Proposal 2 Approval of the Advisory Governing Documents Proposals		63
Quorum		64
Record Date		64
Votes Required		64
Units Outstanding		65
Adjournments		65
Voting Procedure		65
Householding of Proxy Statement/Prospectus		66

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		Page
THE CORPORATE REORGANIZATION		67
Overview		67
Background of the Corporate Reorganization		67
Recommendation of the GP Board and Reasons for the Corporate Reorganization		69
No Appraisal Rights or Dissenters’ Rights		71
Antitrust and Regulatory Matters		71
Listing of New Summit Common Stock; Delisting of the Units		71
Accounting Treatment of the Merger		71
Interests of Certain Persons in the Merger		71
New Summit’s Board of Directors and Management		72
Indemnification; Directors’ and Officers’ Insurance		72
THE MERGER AGREEMENT		74
The Merger		74
Effective Time; Closing		74
Unitholder Approval		74
Conditions to Consummation of the Merger		75
The Merger Consideration		76
Treatment of the Partnership Equity Awards		76
Adjustments to Prevent Dilution		76
Withholding		77
Dividends and Distributions		77
Antitrust and Regulatory Matters		77
Termination		77
Fees and Expenses		78
Indemnification; Directors’ and Officers’ Insurance		78
Amendment and Supplement; Waiver and Consent		78
Representations and Warranties		78
Additional Agreements		79
COMPARISON OF THE RIGHTS OF STOCKHOLDERS AND UNITHOLDERS		80
Purpose and Term of Existence		80
Authorized Capital		80
Dividends/Distributions		82
Business Combinations		84
Management by Board of Directors/General Partner		85
Nomination and Election of Directors		85
Stockholder Proposals and Director Nominations; Proxy Access		86
Removal of Directors; Withdrawal or Removal of General Partner		86
Filling Vacancies on the Board; Replacing the General Partner		88
Change of Management Provisions		88
Preemptive Rights		88
Amendment of Governing Documents		89
Voting Rights; Meetings; Action by Written Consent		92
Indemnification and Limitation on Liability		93
Conflicts of Interest; Fiduciary Duties; Corporate Opportunities		94
Exclusive Forum		96
Taxation		96

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		Page
DESCRIPTION OF NEW SUMMIT CAPITAL STOCK		97
General		97
Common Stock		97
Preferred Stock		97
Blank Check Common Stock		98
Dividends		99
Annual Stockholder Meetings		100
Anti-Takeover Effects of the Proposed Governing Documents and Certain Provisions of Delaware Law		100
Dissenters’ Rights of Appraisal and Payment		102
Stockholders’ Derivative Actions		102
Limitations on Liability and Indemnification and Advancement of Expenses of Officers and Directors		102
Transfer Agent and Registrar		103
Listing		103
UNAUDITED PRO FORMA CONDENSED CONSOLIDATED FINANCIAL INFORMATION		104
MATERIAL U.S. FEDERAL INCOME TAX CONSEQUENCES		110
MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS OF THE PARTNERSHIP		114
BUSINESS OF THE PARTNERSHIP		153
MANAGEMENT OF THE PARTNERSHIP		172
Management of the Partnership		172
Board of Directors of the General Partner		172
Compensation Discussion and Analysis		175
Executive Compensation Tables		189
Director Compensation		195
MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS OF NEW SUMMIT		197
Overview of New Summit		197
BUSINESS OF NEW SUMMIT		198
MANAGEMENT OF NEW SUMMIT		199
Leadership Structure of the New Summit Board		202
Compensation of Directors		202
Committees of the Board of Directors		203
Audit Committee		203
Compensation Committee		203
Nominating, Governance and Sustainability Committee		205
UNITHOLDER PROPOSALS		207
HOUSEHOLDING OF PROXY STATEMENT/PROSPECTUS		208
LEGAL MATTERS		209
EXPERTS		209
WHERE YOU CAN FIND MORE INFORMATION		210
INDEX TO FINANCIAL STATEMENTS		F-1
Annex A — Agreement and Plan of Merger		A-1

iii

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QUESTIONS AND ANSWERS ABOUT THE CORPORATE REORGANIZATION AND THE SPECIAL MEETING

Important Information and Risks. The following are brief answers to some questions that you may have regarding the Corporate Reorganization and matters being considered at the Special Meeting. You should read and consider carefully the remainder of this proxy statement/prospectus, including the Risk Factors beginning on page 28 and the attached Annexes, because the information in this section does not provide all of the information that might be important to you.

Q: Why am I receiving these materials?

A: This proxy statement/prospectus is being used:

(1) by the Partnership to solicit proxies to be used at its Special Meeting of holders of Common Units; and

(2) by New Summit in connection with its offering of shares of Common Stock to the holders of Common Units and shares of Series A Preferred Stock to the holders of Series A Preferred Units as part of the Corporate Reorganization.

The Partnership and New Summit have agreed to reorganize by merging Merger Sub, a subsidiary of New Summit, with and into the Partnership under the terms of the Merger Agreement that is described in this proxy statement/prospectus and attached as Annex A (such transaction, the “Corporate Reorganization”). You are receiving this document because the Corporate Reorganization cannot be completed without the approval of the Merger Agreement by the holders of Common Units.

Q: When and where will the Special Meeting be held?

A: The Special Meeting will be held on July 18, 2024 at 2:00 p.m., Central time. The Special Meeting will be held virtually via live webcast at https://web.lumiconnect.com/217371229 (password: summit2024). You will not be able to attend the Special Meeting in person.

Q: How do I participate in the virtual Special Meeting?

A: The Special Meeting will be held via live webcast. You will be able to attend the Special Meeting, vote your Common Units and submit your questions during the meeting by visiting https://web.lumiconnect.com/217371229 and entering the password (summit2024) and your control number found on your proxy card or voting instruction form.

Questions may be submitted during the Special Meeting through https://web.lumiconnect.com/217371229. Your questions must be confined to matters properly before the Special Meeting and of general concern regarding the Partnership. If there are questions pertinent to matters properly before the Special Meeting that cannot be answered during the meeting due to time constraints, we will post answers to a representative set of such questions at the “Investors” section at www.summitmidstream.com. The questions and answers will be available as soon as practicable after the meeting.

The Special Meeting will begin at 2:00 p.m., Central time. We encourage you to access the Special Meeting before it begins. Online check-in will start approximately 60 minutes before the start of the meeting on July 18, 2024. If you have difficulty accessing or participating in the Special Meeting, please visit https://www.lumiglobal.com/faq for help and support.

Other interested parties may listen to the Special Meeting by visiting https://web.lumiconnect.com/217371229 and logging in as a guest. Guests will be able to hear the Special Meeting but will not be able to vote or ask a question during the meeting.

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Q: What am I being asked to vote on?

A: The holders of Common Units are being asked to consider and vote on a proposal to approve and adopt the Merger Agreement and approve the Merger, as a result of which the Partnership will become a wholly-owned subsidiary of New Summit, and the unitholders will become stockholders of New Summit (the “Merger Proposal”). A vote for the Merger Proposal is effectively a vote in favor of the Corporate Reorganization which will result in a reorganization from a master limited partnership to a C corporation.

In accordance with guidance from the SEC to give unitholders the opportunity to present their separate views on important corporate governance provisions, the holders of Common Units are also being asked to consider and vote on proposals to approve, on an advisory, non-binding basis, certain governance provisions in the amended and restated certificate of incorporation of New Summit (the “New Summit Charter”) and the amended and restated bylaws of New Summit (the “New Summit Bylaws” and, together with the New Summit Charter and the Series A Certificate of Designation (as defined herein), the “Proposed Governing Documents”) in connection with the Merger, which are being presented separately as five sub-proposals (which proposals we refer to, collectively, as the “Advisory Governing Documents Proposals” and, together with the Merger Proposal, the “Proposals.”)

Q: What is the Corporate Reorganization?

A: The Corporate Reorganization is the transaction that will occur if the Merger Agreement receives all necessary approvals of the unitholders and the other closing conditions are satisfied or waived. Pursuant to the Merger Agreement, a wholly-owned subsidiary of New Summit will merge with and into the Partnership and the holders of Common Units will receive shares of Common Stock in exchange for their Common Units and the holders of Series A Preferred Units will receive shares of Series A Preferred Stock.

There are other steps in the transaction that will occur as part of the Corporate Reorganization. You should read “The Merger Agreement” for a description of these other transactions.

Q: Why are the Partnership and New Summit proposing the Corporate Reorganization?

A: The Partnership and New Summit believe that the Corporate Reorganization will benefit the unitholders. See “The Corporate Reorganization — Recommendation of the GP Board and Reasons for the Corporate Reorganization.”

Q: What will limited partners receive in the Corporate Reorganization?

A: If the Corporate Reorganization is completed,

• each outstanding Common Unit will be converted into the right to receive 1.000 shares of Common Stock for each outstanding Common Unit (the “Common Unit Exchange Ratio”); and

• each outstanding Series A Preferred Unit will be converted into the right to receive 1.000 shares of Series A Preferred Stock for each outstanding Series A Preferred Unit (the “Preferred Units Exchange Ratio” and, together with the Common Unit Exchange Ratio, the “Exchange Ratios”).

Immediately following the Corporate Reorganization, the former unitholders (other than the Partnership, the General Partner, the member of the General Partner and its affiliates and members of the GP Board and management) will own approximately 100% of the Common Stock and 100% of the Series A Preferred Stock and the member of the General Partner and its affiliates, along with members of the GP Board and management, will own approximately 5.2% of the Common Stock and 0% of the Series A Preferred Stock.

The Exchange Ratios are fixed and will not be adjusted on account of any change in price of Common Units or Series A Preferred Units prior to consummation of the Corporate Reorganization. As of May 31, 2024, no fractions of a share of Common Stock or Series A Preferred Stock would be issued as Merger Consideration (as defined herein). In the event of an adjustment pursuant to the Merger Agreement such that a fraction of a share of Common Stock or Series A Preferred Stock would be issuable to a unitholder pursuant to the Merger Agreement, such unitholder will receive a number of shares of Common Stock or Series A Preferred Stock that is rounded up to the nearest whole share.

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Q: What will happen to the accrued but unpaid distributions on the Series A Preferred Units?

A: Pursuant to the Fourth Amended and Restated Agreement of Limited Partnership of the Partnership, dated as of May 28, 2020 (as amended, the “Partnership Agreement”) and the Merger Agreement, if the Corporate Reorganization is completed, each holder of Series A Preferred Units will receive in respect of his or her Series A Preferred Units an equivalent number of shares of Series A Preferred Stock pursuant to the Preferred Units Exchange Ratio, with the liquidation preference of each share of Series A Preferred Stock initially equal to $1,000 and the Certificate of Designation will deem all accumulated and unpaid distributions on the Series A Preferred Units to be Series A Unpaid Cash Dividends (as defined in the Certificate of Designation) per share of Series A Preferred Stock, which shall constitute all consideration to be paid in respect to such Series A Preferred Units, and any rights to accumulated and unpaid distributions on such Series A Preferred Units will be discharged.

Q: Where will my shares or limited partner interests trade after the Corporate Reorganization?

A: The Common Stock is expected to be listed on the New York Stock Exchange (“NYSE”) under the symbol “SMC.” We do not intend to apply for the listing of the Series A Preferred Stock on any securities exchange. The Common Units will no longer be publicly traded and the Series A Preferred Units will be cancelled after the consummation of the Corporate Reorganization.

Q: Who is entitled to vote at the Special Meeting?

A: The record date for the Special Meeting is the close of business on June 7, 2024 (the “Record Date”). Only holders of record of Common Units as of the close of business on the Record Date are entitled to notice of, and to vote at, the Special Meeting. Unitholders may cast one vote for each Common Unit owned on the Record Date.

Q: What constitutes a quorum at the Special Meeting?

A: A majority of the outstanding Common Units as of the Record Date represented virtually at the Special Meeting or by proxy (by submitting a properly executed proxy card or properly submitting a proxy by Internet) will constitute a quorum and will permit the Partnership to conduct the proposed business at the Special Meeting. Proxies received but marked as abstentions and broker non-votes (if any) will be counted as Common Units that are present and entitled to vote for purposes of determining the presence of a quorum.

Q: What is the vote required to approve each proposal?

A: Approval of the Merger Proposal requires the affirmative vote of holders of a majority of the outstanding Common Units. Each of the Advisory Governing Documents Proposals, each of which is an advisory, non-binding vote, requires the affirmative vote of holders of a majority of the votes cast (not including abstentions and broker non-votes) by holders of the Common Units present (virtually at the Special Meeting or by proxy) and entitled to vote at the Special Meeting.

Abstentions and broker non-votes (if any) will have the effect of a vote AGAINST the Merger Proposal and will not be taken into account in determining the outcome of the Advisory Governing Documents Proposals. The votes on each Proposal are separate and apart from the votes on the other Proposals. Accordingly, holders of Common Units may vote to approve certain of the Proposals and vote not to approve other Proposals. Because the votes on the Advisory Governing Documents Proposals are advisory in nature only, they will not be binding on the Partnership or New Summit.

All of the directors and executive officers of the General Partner beneficially owned, in the aggregate, approximately 5.4% of the outstanding Common Units as of the Record Date. The Partnership and New Summit believe that the directors and executive officers of the General Partner will vote in favor of the Merger Proposal and the Advisory Governing Documents Proposals.

Q: Which Common Units are considered “outstanding”?

A: “Outstanding” means, with respect to Common Units, all Common Units that are issued by the Partnership and reflected as outstanding on the Partnership’s books and records as of the date of determination; provided, however, that if any person or group, other than the General Partner and its affiliates, acquires beneficial

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ownership of 20% or more of the outstanding Common Units, the Common Units owned by such person or group will cease to be considered outstanding and will therefore lose all their voting rights with respect to the Special Meeting. This loss of voting rights does not apply to persons who acquired such Common Units from affiliates of the Partnership, their transferees and persons who acquired such Common Units with the prior approval of the GP Board.

In addition, any Common Units held by the Partnership or a subsidiary of the Partnership are not considered outstanding with respect to voting under the Partnership Agreement. However, should such securities be transferred to an entity that is not a subsidiary of the Partnership, such Common Units would then be considered outstanding with respect to voting.

Q: How do I vote my Common Units if I hold them in my own name?

A: After you have read this proxy statement/prospectus carefully, please respond by completing, signing and dating your proxy card and returning it in the enclosed postage-paid envelope, or by submitting your proxy by Internet as soon as possible in accordance with the instructions provided under “The Special Meeting — Voting Procedure.”

Q: If my Common Units are held in “street name” by my bank, broker or other nominee, will my bank, broker or other nominee vote them for me?

A: As a general rule, absent specific instructions from you, your bank, broker or other nominee is not allowed to vote your Common Units on any proposal on which your bank, broker or other nominee does not have discretionary authority. The only proposals for consideration at the Special Meeting are the Merger Proposal and the Advisory Governing Documents Proposals, which are non-discretionary matters for which banks, brokers or other nominees do not have discretionary authority to vote. To instruct your bank, broker or other nominee how to vote, you should follow the directions that your bank, broker or other nominee provides to you.

Please note that you may not vote your Common Units held in “street name” by returning a proxy card directly to the Partnership or by voting virtually at the Special Meeting unless you provide a “legal proxy,” which you must obtain from your bank, broker or other nominee. If you do not instruct your bank, broker or other nominee on how to vote your Common Units, your bank, broker or other nominee cannot vote your Common Units. You should therefore provide your bank, broker or other nominee with instructions as to how to vote your Common Units.

Q: When do you expect the Corporate Reorganization to be consummated?

A: We currently expect the Merger to close in the second half of 2024, subject to the conditions described herein. A number of conditions must be satisfied before the Partnership and New Summit can complete the Corporate Reorganization, including the approval of the Merger Agreement by the holders of Common Units. Although the Partnership and New Summit cannot be sure when all of the conditions to the Corporate Reorganization will be satisfied, the Partnership and New Summit expect to consummate the Corporate Reorganizations in the second half of 2024 (assuming the Merger Agreement is approved by the holders of Common Units), subject to, among other things, the discretion of the GP Board and the registration statement of which this proxy statement/prospectus forms a part having been declared effective under the Securities Act. See “Summary — The Merger Agreement — Conditions to Consummation of the Merger” and “Risk Factors — The Corporate Reorganization is subject to conditions, including some conditions that may not be satisfied on a timely basis, if at all. Failure to complete the Corporate Reorganization, or significant delays in completing the Corporate Reorganization, could negatively affect the Partnership’s business and financial results and the price of the Common Units or Series A Preferred Units or, following the consummation of the Corporate Reorganization, future business and financial results and the price of the Common Stock or Series A Preferred Stock.”

Q: What if the GP Board elects not to consummate the Corporate Reorganization?

A: The GP Board’s election to consummate the Corporate Reorganization is a condition precedent to consummation of the Corporate Reorganization. Such an election may not occur regardless of the satisfaction or waiver of other closing conditions. The Corporate Reorganization will not be consummated if the GP Board

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does not authorize the Corporate Reorganization prior to the closing of the Merger. If the GP Board does not elect to consummate the Corporate Reorganization, the Partnership will remain a public master limited partnership.

Q: What if the proposed Corporate Reorganization is not consummated?

A: It is possible that the proposed Corporate Reorganization will not be consummated. The Corporate Reorganization will not be consummated if all closing conditions are not satisfied or waived. If the Corporate Reorganization is not consummated, the Partnership will remain a public master limited partnership. In addition, the failure to consummate the Corporate Reorganization may adversely impact the Partnership’s business going forward. See “Risk Factors.” Whether or not the Corporate Reorganization is consummated, the costs and expenses incurred in connection with the Corporate Reorganization will be paid in full by the Partnership.

Q: How does the GP Board recommend that the unitholders vote?

A: The GP Board unanimously recommends that holders of Common Units vote FOR the Merger Proposal and FOR the Advisory Governing Documents Proposals.

The GP Board has determined that the Merger Agreement and the Merger are advisable and in the best interests of the Partnership and the unitholders, unanimously adopted the Merger Agreement and unanimously approved the execution, delivery and performance of the Merger Agreement and the transactions contemplated thereby, and resolved to submit the Merger Agreement to a vote of the holders of Common Units and recommend approval of the Merger Agreement by the holders of Common Units. For more information regarding the recommendation of the GP Board, see “The Corporate Reorganization — Recommendation of the GP Board and Reasons for the Corporate Reorganization.”

In considering the recommendation of the GP Board, unitholders should be aware that some of the General Partner’s directors and executive officers may have interests in the Corporate Reorganization that are different from, or in addition to, the interests they may have as unitholders. See “The Corporate Reorganization — Interests of Certain Persons in the Merger.”

Q: What are the expected U.S. federal income tax consequences of the Merger to a U.S. holder of Common Units?

A: The exchange of Common Units by a U.S. holder (as defined in “Material U.S. Federal Income Tax Consequences”) for Common Stock in the Merger is generally intended to qualify as an exchange described in Section 351 of the Code (as defined herein).

Based on the foregoing, a U.S. holder is not expected to recognize gain or loss in the Merger, subject to the application of Section 357(c) of the Code.

Under Section 357(c) of the Code, a U.S. holder would recognize gain in the Merger if and to the extent that (i) the aggregate amount of Partnership liabilities allocable to such U.S. holder immediately prior to the Merger exceeds (ii) the U.S. holder’s aggregate tax basis in the Common Units exchanged by such U.S. holder.

Any gain recognized by a U.S. holder in the Merger generally will be taxable as capital gain, but a portion of any gain may be separately computed and taxed as ordinary income under Section 751 of the Code to the extent attributable to “unrealized receivables,” including depreciation recapture, or to “inventory items” owned by the Partnership and its subsidiaries.

See “Material U.S. Federal Income Tax Consequences” for a more complete discussion of the expected material U.S. federal income tax consequences of the Merger.

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Q: What are the expected U.S. federal income tax consequences for a U.S. holder of the ownership of Common Stock after the Merger is completed?

A: New Summit is classified as a corporation for U.S. federal income tax purposes and is subject to U.S. federal income tax on its taxable income. As such, equity owners will no longer receive Schedules K-1. Any future distribution of cash by New Summit to a stockholder who is a U.S. holder generally will be included in such U.S. holder’s income as dividend income to the extent of New Summit’s current or accumulated “earnings and profits,” as determined under U.S. federal income tax principles, and will be reported to such owner on Form 1099-DIV. A portion of the cash distributed to stockholders by New Summit after the Merger may exceed New Summit’s current and accumulated earnings and profits. Distributions of cash in excess of New Summit’s current and accumulated earnings and profits will be treated as a non-taxable return of capital reducing a U.S. holder’s adjusted tax basis in such U.S. holder’s Common Stock and, to the extent the distribution exceeds such stockholder’s adjusted tax basis, as capital gain from the sale or exchange of such Common Stock. See “Material U.S. Federal Income Tax Consequences” for a more complete discussion of the expected material U.S. federal income tax consequences of owning and disposing of Common Stock received in the Merger.

Q: Are unitholders entitled to appraisal rights or dissenters’ rights?

A: No. The unitholders are not entitled to appraisal rights or dissenters’ rights in connection with the Merger under applicable law or contractual appraisal rights or dissenters’ rights under the Partnership Agreement or the Merger Agreement.

Q: What if I do not vote?

A: If you do not vote virtually at the Special Meeting or by proxy, vote “abstain” on your proxy card or a broker non-vote is made, it will be deemed to not be a vote cast with respect to the Merger Proposal and the Advisory Governing Documents Proposals. If you sign and return your proxy card but do not indicate how you want to vote, your proxy will be counted as a vote FOR the Merger Proposal and FOR the Advisory Governing Documents Proposals.

Q: If I am planning to attend the Special Meeting virtually, should I still vote by proxy?

A: Yes. Whether or not you plan to attend the Special Meeting, you should vote by proxy. Your Common Units will not be voted if you do not vote by proxy or do not vote virtually at the Special Meeting, as applicable.

Q: Who may attend the Special Meeting?

A: The holders of Common Units (or their authorized representatives) may attend the Special Meeting.

Q: Can I change my vote after I have submitted my proxy?

A: Yes. If you own your Common Units in your own name, you may revoke your proxy at any time prior to its exercise by:

• submitting a written revocation to the Secretary of the General Partner at the address indicated on the cover page of this proxy statement (provided that revocation is received by the Secretary of the General Partner by 11:59 p.m. Central time on July 17, 2024);

• submitting your valid, signed and later-dated proxy by mail (provided that later-dated proxy is received by 11:59 p.m. Central time on July 17, 2024);

• submitting your valid proxy over the Internet by 11:59 p.m. Central time on July 17, 2024; or

• voting during the Special Meeting.

Your presence without voting at the Special Meeting will not automatically revoke your proxy, and any revocation during the Special Meeting will not affect votes previously taken.

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Q: What should I do if I receive more than one set of voting materials for the Special Meeting?

A: You may receive more than one set of voting materials for the Special Meeting, and the materials may include multiple proxy cards or voting instruction cards. For example, you will receive a separate voting instruction card for each brokerage account in which you hold Common Units. Additionally, if you are a holder of record registered in more than one name, you will receive more than one proxy card. Please complete, sign, date and return each proxy card and voting instruction card that you receive according to the instructions on it.

Q: Whom do I call if I have further questions about voting, the Special Meeting or the Merger?

A: Any unitholders who have questions about the Merger, including the procedures for voting their Common Units, or who desire additional copies of this proxy statement/prospectus or additional proxy cards should contact:

Morrow Sodali LLC
430 Park Avenue, 14th Floor
New York, NY 10022
Call toll-free at (800) 662-5200 (in North America)
or +1 (203) 658-9400 (outside of North America)
Email: SMLP@info.morrowsodali.com

Summit Midstream GP, LLC
910 Louisiana Street, Suite 4200
Houston, Texas 77002
(832) 413-4770
Attention: Secretary

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SUMMARY

This summary highlights some of the information in this proxy statement/prospectus. It may not contain all of the information that is important to you. To understand the Corporate Reorganization fully and for a more complete description of the terms of the Corporate Reorganization, you should carefully read this document and the Annexes to this document, including the full text of the Merger Agreement included as Annex A.

References in this proxy statement/prospectus to the “Partnership” refer to Summit Midstream Partners, LP and its subsidiaries. References to the “General Partner” refer to Summit Midstream GP, LLC, the general partner of the Partnership. References to “New Summit” refer to Summit Midstream Corporation. References to “Series A Preferred Units” refer to the 9.50% Series A Fixed-to-Floating Rate Cumulative Redeemable Perpetual Preferred Units representing limited partner interests in the Partnership. References to “Common Units” refers to the common units representing limited partner interests in the Partnership. References to “Units” refer to the Common Units and the Series A Preferred Units, collectively, and “unitholders” refers to the holders of Units. As used herein, unless the context requires otherwise, the term “limited partner interests” refers to the Units, and “limited partners” refers to the holders of limited partner interests. References to “Common Stock” refer to the common stock, par value $0.01, of New Summit. References to “Series A Preferred Stock” refer to the Series A Floating Rate Cumulative Redeemable Perpetual Preferred Stock, par value $0.01 per share, of New Summit.

The Parties

Summit Midstream Corporation

Summit Midstream Corporation, or New Summit, is a Delaware corporation incorporated on May 14, 2024 for the purpose of effecting the Corporate Reorganization. New Summit has not conducted any business operations other than incidental to its formation and in connection with the transactions contemplated by the Corporate Reorganization. Following the Corporate Reorganization, New Summit will own the Partnership as a direct wholly-owned subsidiary and will have no significant assets other than the stock or other voting securities of its subsidiaries. New Summit’s principal executive offices are located at 910 Louisiana Street, Suite 4200, Houston, Texas 77002, and its telephone number is (832) 413-4770.

Summit Midstream Partners, LP

Summit Midstream Partners, LP, or the Partnership, is a Delaware master limited partnership headquartered in Houston, Texas, focused on developing, owning and operating midstream energy infrastructure assets that are strategically located in the core producing areas of unconventional resource basins, primarily shale formations, in the continental United States.

The Partnership provides natural gas, crude oil and produced water gathering, processing and transportation services pursuant to primarily long-term, fee-based agreements with customers and counterparties in four unconventional resource basins: (i) the Williston Basin, which includes the Bakken and Three Forks shale formations in North Dakota; (ii) the Denver-Julesburg Basin, which includes the Niobrara and Codell shale formations in Colorado and Wyoming; (iii) the Fort Worth Basin, which includes the Barnett Shale formation in Texas; and (iv) the Piceance Basin, which includes the Mesaverde formation as well as the Mancos and Niobrara shale formations in Colorado. The Partnership has an equity method investment in Double E Pipeline, LLC (“Double E”), which provides interstate natural gas transportation service from multiple receipt points in the Delaware Basin to various delivery points in and around the Waha Hub in Texas.

The Partnership’s principal executive offices are located at 910 Louisiana Street, Suite 4200, Houston, Texas 77002, and its telephone number is (832) 413-4770.

Summit Midstream GP, LLC

Summit Midstream GP, LLC, or the General Partner, is a Delaware limited liability company and the general partner of the Partnership. The General Partner is responsible for conducting the business and managing the operations of the Partnership. The General Partner’s principal executive offices are located at 910 Louisiana Street, Suite 4200, Houston, Texas 77002, and its telephone number is (832) 413-4770.

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Summit SMC NewCo, LLC

Summit SMC NewCo, LLC, or Merger Sub, is a Delaware limited liability company formed on May 14, 2024 for the purpose of effecting the Corporate Reorganization. Merger Sub has not conducted any business operations other than incidental to its formation and in connection with the transactions contemplated by the Corporate Reorganization. Following the Corporate Reorganization, Merger Sub will merge with and into the Partnership, with the Partnership surviving the Merger. Merger Sub’s principal executive offices are located at 910 Louisiana Street, Suite 4200, Houston, Texas 77002, and its telephone number is (832) 413-4770.

The Merger

Subject to the terms and conditions of the Merger Agreement and in accordance with Delaware law, at the effective time of the Merger (the “Effective Time”), Merger Sub, a wholly-owned subsidiary of New Summit, will merge with and into the Partnership, with the Partnership continuing as the surviving entity and a wholly-owned subsidiary of New Summit.

The Merger Consideration

At the Effective Time:

• each outstanding Common Unit will be converted into the right to receive 1.000 shares of Common Stock; and

• each outstanding Series A Preferred Unit will be converted into the right to receive 1.000 shares of Series A Preferred Stock for each outstanding Series A Preferred Unit;

with the exception that (i) limited partner interests that are owned immediately prior to the Effective Time by the Partnership or its subsidiaries will be automatically cancelled and cease to exist and (ii) any Units owned immediately prior to the Effective Time by the General Partner or New Summit or any of its subsidiaries (other than the Partnership and its subsidiaries) will remain outstanding in the Partnership, unaffected by the Merger (collectively, the “Merger Consideration”).

New Summit will not issue any fractional shares of Common Stock or Series A Preferred Stock in the Merger. Instead, each holder of Common Units or Series A Preferred Units that are exchanged pursuant to the Merger Agreement who otherwise would have received a fraction of a share of Common Stock or Series A Preferred Stock will be entitled to receive, from the exchange agent appointed by New Summit pursuant to the Merger Agreement, a number of shares of Common Stock or Series A Preferred Stock that is rounded up to the nearest whole share.

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Ownership Structure Before the Corporate Reorganization

Ownership Structure After the Corporate Reorganization

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Treatment of the Partnership Equity Awards

Pursuant to the Merger Agreement, at the Effective Time, each outstanding phantom unit award granted under the Summit Midstream Partners, LP 2012 Long-Term Incentive Plan, as amended and restated, or the Summit Midstream Partners, LP 2022 Long-Term Incentive Plan, as amended (the “Partnership Phantom Unit Awards”), will be converted into an award of restricted stock units relating to a number of shares of Common Stock of New Summit (the “New Summit RSUs”) equal to the product of (a) the number of Common Units subject to such Partnership Phantom Unit Award as of immediately prior to the Effective Time, multiplied by (b) the Common Unit Exchange Ratio. The New Summit RSUs will be subject to substantially the same terms and conditions as were applicable to the converted Partnership Phantom Unit Awards, including vesting and payment timing provisions, as applicable.

Special Meeting

When and where: The Special Meeting will be held on July 18, 2024 at 2:00 p.m., Central time. The Special Meeting will be held virtually via live webcast at https://web.lumiconnect.com/217371229 (password: summit2024). You will not be able to attend the Special Meeting in person.

What you are being asked to vote on: At the Special Meeting, holders of Common Units will vote on the Merger Proposal and the Advisory Governing Documents Proposals. A vote for the Merger Proposal is effectively a vote in favor of the Corporate Reorganization, which will result in a conversion from a master limited partnership to a C corporation. The holders of Common Units also may be asked to consider other matters as may properly come before the Special Meeting. At this time, the Partnership knows of no other matters that will be presented for the consideration of the holders of Common Units at the Special Meeting.

Who may vote: You may vote at the Special Meeting if you owned Common Units at the close of business on the Record Date of June 7, 2024. On the Record Date, there were 10,648,686 Common Units outstanding. You may cast one vote for each outstanding Common Unit that you owned on the Record Date. The shares of Series A Preferred Stock that holders of Series A Preferred Units will receive upon consummation of the Corporate Reorganization have substantially similar rights, preferences and privileges as the Series A Preferred Units. The holders of Series A Preferred Units are not being asked to approve the Merger Agreement or any of the other Proposals being presented to holders of Common Units, as contemplated by the Partnership Agreement.

What vote is needed: Approval of the Merger Proposal requires the affirmative vote of holders of a majority of the outstanding Common Units. Each of the Advisory Governing Documents Proposals, each of which is an advisory, non-binding vote, requires the affirmative vote of holders of a majority of the votes cast (not including abstentions and broker non-votes) by holders of the Common Units present (virtually at the Special Meeting or by proxy) and entitled to vote at the Special Meeting. Abstentions and broker non-votes (if any) will have the effect of a vote AGAINST the Merger Proposal and will not be taken into account in determining the outcome of the Advisory Governing Documents Proposals. The votes on each Proposal are separate and apart from the votes on the other Proposals. Accordingly, holders of Common Units may vote to approve certain of the Proposals and vote not to approve other Proposals. Because the votes on the Advisory Governing Documents Proposals are advisory in nature only, they will not be binding on the Partnership or New Summit.

Recommendation of the GP Board and Reasons for the Corporate Reorganization

The GP Board has unanimously determined that the Merger Agreement is advisable and in the best interests of the Partnership, its subsidiaries and the unitholders. The GP Board has also determined that the Merger is advisable and in the best interests of the Partnership, its subsidiaries and the unitholders; approved and adopted the Merger Agreement and approved the execution, delivery and performance of the Merger Agreement and the transactions contemplated thereby; and resolved to submit the Merger Agreement to a vote of the holders of Common Units and recommend approval of the Merger Agreement by the holders of Common Units. Accordingly, the GP Board unanimously recommends that the holders of Common Units vote FOR the approval of the Merger Proposal.

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In reaching its determinations and recommendations described above, the GP Board consulted with the Partnership’s senior management, financial and tax advisors and outside legal counsel. These consultations included discussions regarding the Partnership’s strategic business plan, the Partnership’s past and current business operations and financial condition and performance, the Partnership’s future prospects, other potential strategic alternatives that may be available to the Partnership and the potential Corporate Reorganization. The GP Board considered a number of substantive factors, both positive and negative, and potential benefits and detriments of the Corporate Reorganization to the Partnership and the unitholders. For a more complete discussion of these factors, see the section entitled “The Corporate Reorganization — Recommendation of the GP Board and Reasons for the Corporate Reorganization.”

Interests of Certain Persons in the Merger

In considering the recommendations of the GP Board, unitholders should be aware that some of the executive officers and directors of the General Partner have interests in the Corporate Reorganization that may differ from, or may be in addition to, the interests of unitholders generally. These interests include:

• Certain indemnification arrangements and insurance policies for directors and officers of the General Partner and New Summit will be continued for six (6) years if the Corporate Reorganization is completed.

• Pursuant to the Merger Agreement and the approval of the GP Board, and as more fully described under “The Merger Agreement — Treatment of the Partnership Equity Awards,” the outstanding phantom unit awards of each executive officer of the General Partner (as well as any such awards held by employees of the Partnership) will be converted based on the Common Unit Exchange Ratio into restricted stock units with respect to Common Stock of New Summit.

• Nearly all of the directors and executive officers of the General Partner beneficially own Common Units and will receive the applicable Merger Consideration upon consummation of the Corporate Reorganization.

• All of the officers of the General Partner have been offered continued employment with New Summit after the Effective Time and new employment agreements have been approved by the GP Board and are anticipated to be entered into upon the closing of the Corporate Reorganization.

New Summit’s Board of Directors and Management

Upon consummation of the Corporate Reorganization, the New Summit Board will consist of seven directors, divided into three classes. The members of each class will serve staggered, three-year terms (other than with respect to the initial terms of the Class I and Class II directors, which will be one and two years, respectively). Upon the expiration of the term of a class of directors, directors in that class will be elected for three-year terms at the annual meeting of stockholders in the year in which their term expires. Following the completion of this offering:

• Lee Jacobe and Jerry L. Peters will be Class I directors, whose initial terms will expire at the 2025 annual meeting of stockholders;

• J. Heath Deneke, Robert J. McNally and Marguerite Woung-Chapman will be Class II directors, whose initial terms will expire at the 2026 annual meeting of stockholders; and

• James J. Cleary and Rommel M. Oates will be a Class III directors, whose initial terms will expire at the 2027 annual meeting of stockholders.

This classification of the New Summit Board may have the effect of delaying or preventing changes in control. Mr. Deneke will be the Chairman of the New Summit Board unless he is not able or willing to serve as a director at the time of the consummation of the Corporate Reorganization, in which case the New Summit Board will elect a Chairman.

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If any of the designees to the New Summit Board identified above are not able or willing to serve as a director at the time of the consummation of the Corporate Reorganization, the GP Board will determine a replacement. After the consummation of the Corporate Reorganization, each director of New Summit will serve as a director until such person’s successor is elected or, if earlier, until such director dies, resigns, retires or is removed in accordance with New Summit’s organizational documents and applicable law.

The designees to the New Summit Board identified above have indicated that they intend to vote all Common Units held by them or over which they have control in favor of approval and adoption of the Merger Agreement and the transactions contemplated by the Merger Agreement.

The Partnership and New Summit expect that that the existing management team will stay in place after the Corporate Reorganization. For information regarding the people expected to be officers of New Summit upon the consummation of the Corporate Reorganization, see “Management of the Partnership.”

The Merger Agreement

Conditions to Consummation of the Merger

The Partnership and New Summit may not complete the Merger unless each of the following conditions is satisfied or waived:

• the Merger Agreement must have been approved by the affirmative vote of the holders of a majority of the outstanding Common Units (the “unitholder approval”);

• no law, injunction, judgment or ruling enacted, promulgated, issued, entered, amended or enforced by any governmental entity (collectively, “restraints”) is in effect enjoining, restraining, preventing or prohibiting the consummation of the transactions contemplated by the Merger Agreement or making the consummation of the transactions contemplated by the Merger Agreement illegal;

• the registration statement of which this proxy statement/prospectus forms a part must have been declared effective under the Securities Act and must not be subject to any stop order suspending the effectiveness of the registration statement or proceedings initiated or threatened by the SEC for that purpose;

• the shares of Common Stock deliverable to the holders of Common Units as contemplated by the Merger Agreement must have been approved for listing on a national securities exchange, subject to official notice of issuance;

• supplemental indentures required pursuant to the terms of indentures governing debt securities of the Partnership or its subsidiaries in connection with the Corporate Reorganization must have been entered into by New Summit, along with any applicable guarantor, trustee and collateral agent, and all conditions precedent necessary for their effectiveness, other than any conditions related to the transactions contemplated by the Merger Agreement, must have been satisfied or waived;

• a joinder to the ABL Agreement (as defined herein) must have been executed and delivered by New Summit, and New Summit must have executed and delivered such other documents as are reasonably requested by the Partnership, and must have taken such actions necessary or reasonably advisable as determined by the Partnership, to guarantee the Obligations (as defined in the ABL Agreement);

• the General Partner must have delivered or caused to be delivered to each of the Partnership, New Summit and Merger Sub a consent authorizing, among other things, the Merger Agreement and the transactions contemplated thereby; and

• the GP Board must authorize the consummation of the Merger following the satisfaction or the waiver of the other conditions precedent required to consummate the Merger.

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The obligations of New Summit and Merger Sub to effect the Merger are subject to the satisfaction or waiver of the following additional conditions:

• the representations and warranties in the Merger Agreement of the Partnership and the General Partner being true and correct as of May 31, 2024 and as of the closing date of the Merger, subject to certain standards, including materiality and material adverse effect qualifications, as described in “The Merger Agreement — Conditions to Consummation of the Merger”;

• the Partnership and the General Partner having performed in all material respects all obligations required to be performed by each of them under the Merger Agreement; and

• the receipt by New Summit of an officer’s certificate signed on behalf of the Partnership and the General Partner by an executive officer of the General Partner certifying that the preceding conditions have been satisfied.

The obligation of the Partnership to effect the Merger is subject to the satisfaction or waiver of the following additional conditions:

• the representations and warranties in the Merger Agreement of New Summit being true and correct as of May 31, 2024 and as of the closing date of the Merger, subject to certain standards, including materiality and material adverse effect qualifications, as described in “The Merger Agreement — Conditions to Consummation of the Merger”;

• New Summit and Merger Sub having performed in all material respects all obligations required to be performed by each of them under the Merger Agreement; and

• the receipt by the Partnership of an officer’s certificate signed on behalf of New Summit by an executive officer of New Summit certifying that the preceding conditions have been satisfied.

Unitholder Approval

The Partnership has agreed to hold the Special Meeting as promptly as practicable for purposes of obtaining the unitholder approval. See “— Special Meeting.”

The Merger Agreement also requires the Partnership, through the GP Board, to recommend to the holders of Common Units the approval of the Merger Agreement, unless the GP Board has concluded that recommending approval of the Merger Agreement to the holders of Common Units would be inconsistent with its duties to the unitholders under applicable law, and to use reasonable best efforts to obtain from the holders of Common Units the unitholder approval. This obligation of the Partnership to hold the Special Meeting is not affected by the withdrawal or modification by the GP Board of its recommendation with respect to the Merger Proposal or its approval of the Merger Agreement or the transactions contemplated by the Merger Agreement.

Termination of the Merger Agreement

The Partnership and New Summit may terminate the Merger Agreement at any time prior to the Effective Time by mutual written consent authorized by the New Summit Board and GP Board.

In addition, either the Partnership or New Summit may terminate the Merger Agreement at any time prior to the Effective Time by written notice to the other party if:

• the closing of the Merger has not occurred on or before January 1, 2026;

• any restraint is in effect and has become final and nonappealable, except that the right to terminate will not be available to the Partnership or New Summit if the failure to satisfy such condition was due to the failure of, in the case of the Partnership, the Partnership or the General Partner and in the case of New Summit or Merger Sub, to perform any of its obligations under the Merger Agreement; or

• the Special Meeting is concluded and the unitholder approval is not obtained.

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New Summit also may terminate the Merger Agreement if:

• the Partnership or the General Partner breaches or fails to perform any of its representations, warranties, covenants or agreements such that certain closing conditions would not be satisfied, or if such breach or failure is capable of being cured, such breach or failure has not been cured within 30 days following delivery of written notice by New Summit and New Summit is not then in any material breach.

The Partnership also may terminate the Merger Agreement if:

• the GP Board, prior to the Special Meeting, shall have concluded that recommending to the holders of Common Units approval of the Merger Agreement would be inconsistent with its duties to the unitholders under applicable laws; or

• New Summit breaches or fails to perform any of its representations, warranties, covenants or agreements such that certain closing conditions would not be satisfied, or if such breach or failure is capable of being cured, such breach or failure has not been cured within 30 days following delivery of written notice by the Partnership and the General Partner and the Partnership are not then in any material breach.

Fees and Expenses

The Merger Agreement provides that all costs and expenses, including fees and disbursements of counsel, financial advisors and accountants, incurred in connection with the Corporate Reorganization shall be paid by the Partnership.

Material U.S. Federal Income Tax Consequences

Tax Consequences of the Merger

The exchange of Common Units by a U.S. holder (as defined in “Material U.S. Federal Income Tax Consequences”) pursuant to the Merger Agreement is generally intended to qualify as an exchange described in Section 351 of the Code. Accordingly, a U.S. holder is not expected to recognize gain or loss in the Merger, subject to the application of Section 357(c) of the Code.

Under Section 357(c) of the Code, a U.S. holder will recognize gain in the Merger to the extent that the aggregate amount of Partnership liabilities allocable to such U.S. holder immediately prior to the Merger exceeds the U.S. holder’s aggregate tax basis in the Common Units exchanged by such U.S. holder.

Each U.S. holder’s aggregate tax basis in the shares of Common Stock received in the Merger will generally be the same as the U.S. holder’s aggregate tax basis in the Common Units surrendered in exchange therefor, increased by the amount of any gain recognized in the Merger, including any recognized gain described in the preceding paragraph, and reduced by the aggregate amount of Partnership liabilities allocable to such U.S. holder immediately prior to the Merger.

The holding period of Common Stock received by a U.S. holder in exchange for Common Units will generally include the holding period of the Common Units for which it is exchanged, however, the Internal Revenue Service (the “IRS”) has previously taken the position that to the extent the Common Stock is received by such U.S. holder in exchange for interests in Section 751 assets of the Partnership that are neither capital assets nor Section 1231 assets, the holding period of such Common Stock begins on the day following the date of the Merger. Each U.S. holder is strongly urged to consult its own tax advisor with respect to the holding period of Common Stock received in the Merger.

Character of Gain. Any gain recognized by a U.S. holder in the Merger generally will be taxable as capital gain, but a portion of this gain, if any, may be separately computed and taxed as ordinary income under Section 751 of the Code to the extent attributable to “unrealized receivables,” including depreciation recapture, or to “inventory items” owned by the Partnership and its subsidiaries. Capital gain recognized by a U.S. holder will generally be long-term capital gain if the U.S. holder has held its Common Units for more than one year as of the Effective Time. Long-term capital gains of non-corporate taxpayers are generally taxed at reduced rates.

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For taxable years beginning on or before December 31, 2025, a non-corporate U.S. holder may be entitled to a deduction equal to 20% of any gain recognized to the extent it is attributable to “unrealized receivables,” including depreciation recapture, or to “inventory items” owned by the Partnership and its subsidiaries. U.S. holders should consult their tax advisors regarding the application of this deduction.

Passive Losses. Passive losses that were not deductible by a U.S. holder in prior taxable periods because such losses exceeded a U.S. holder’s share of the Partnership’s income may be utilized to offset any gain recognized in the Merger and may be deducted in full upon the U.S. holder’s taxable disposition of its Common Stock received in the Merger.

The U.S. federal income tax consequences of the Merger to a unitholder are complex and will depend on such unitholder’s own personal tax situation. Accordingly, each unitholder is strongly urged to consult its own tax advisor with respect to the specific tax consequences of the Merger, taking into account its own particular circumstances. See “Material U.S. Federal Income Tax Consequences” for a more complete discussion of certain U.S. federal income tax consequences of the Merger.

Other Information Related to the Corporate Reorganization

No Appraisal Rights or Dissenters’ Rights

The limited partners are not entitled to appraisal rights or dissenters’ rights in connection with the Merger under applicable law or contractual appraisal rights under the Partnership Agreement or the Merger Agreement.

Antitrust and Regulatory Matters

The Partnership and New Summit have determined that the Corporate Reorganization is not subject to the requirements of the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended (the “HSR Act”), and no other governmental consents are required.

Listing of New Summit Common Stock; Delisting of the Units

It is a condition to the consummation of the Merger that the Common Stock issuable in the Merger be approved for listing on the NYSE. The common stock is expected to trade on NYSE under the symbol “SMC.” We do not intend to apply for the listing of the Series A Preferred Stock on any securities exchange. Upon consummation of the Merger, the Common Units currently listed on NYSE will cease to be listed on NYSE.

The former holders of Common Units and the former holders of Series A Preferred Units will become stockholders of New Summit, and their rights as stockholders will be governed by Delaware law and by the Proposed Governing Documents that will be in effect upon consummation of the Corporate Reorganization.

Accounting Treatment of the Merger

The Merger will be accounted for as a common-control transaction between the Partnership and Summit Midstream Corporation as a result of the Partnership’s unitholders controlling both the Partnership and Summit Midstream Corporation before and after the Merger. Upon closing the Merger, Summit Midstream Corporation will recognize deferred tax assets and deferred tax liabilities for any temporary differences that exist as of the Merger date and record substantially all of such effects as income (loss) from continuing operations, with any amount not recognized as income (loss) from continuing operations as an increase or decrease directly to the Partnership’s capital account. Upon completion of the Merger, the Partnership’s common limited partner capital account will be eliminated and replaced with common shares, paid in capital, and retained earnings. Additionally, the Series A Preferred Units will be exchanged for an equivalent number of shares of Series A Preferred Stock, with no substantive changes in contractual terms or investor cash flows.

Comparison of the Rights of Stockholders and Unitholders

A limited partnership is inherently different from a corporation. Ownership interests in a limited partnership are therefore fundamentally different from ownership interests in a corporation. Holders of Common Units and holders of Series A Preferred Units will own Common Stock and Series A Preferred Stock, respectively, following the

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consummation of the Merger, and their rights associated with the Common Stock and Series A Preferred Stock, as applicable, will be governed by the Delaware General Corporation Law (the “DGCL”) and New Summit’s organizational documents (which will be effective upon consummation of the Merger), which differ in a number of respects from the Partnership Agreement and the Delaware Revised Uniform Limited Partnership Act (the “Delaware LP Act”). These differences are described in more detail under “Comparison of the Rights of Stockholders and Unitholders.”

Recent Developments

Ongoing Strategic Activities

We regularly evaluate a range of strategic alternatives and frequently engage in discussions with potential counterparties. In October 2023, we announced that the GP Board had engaged external advisers to evaluate strategic alternatives for the Partnership, which has resulted in the (i) November 2023 refinancing of the 2025 Senior Notes (as defined herein) and related amendments to the ABL Facility (as defined herein), (ii) Utica Divestiture (as defined below) in March 2024, (iii) Mountaineer Divestiture (as defined below) in May 2024, and (iv) determination to seek unitholder approval for the Corporate Reorganization. In March 2024, the Partnership announced that the GP Board and our management team had completed the active strategic review, but would continue to evaluate other transactions as they developed. The Corporate Reorganization is a continuation of the results of our previously completed strategic review. The Partnership has received, from time to time, proposals from unaffiliated third-parties with respect to acquisitions of certain of our assets; however, the Partnership does not view any such transactions as probable to occur at this time.

The Partnership has had and continues to have discussions with unaffiliated third-parties with respect to potential strategic transactions (a “Potential Transaction”). The Corporate Reorganization is not contingent upon the entry into or consummation of a Potential Transaction and the GP Board expects to proceed with the Corporate Reorganization regardless of the status of any Potential Transaction. We expect that any Potential Transaction would be contingent upon the consummation of the Corporate Reorganization. These discussions include Potential Transactions in which the counterparties would acquire control of the Partnership or, after the Corporate Reorganization, New Summit.

There can be no assurance that these discussions will result in the consummation of a Potential Transaction. If the GP Board decides to proceed with a Potential Transaction, it may not be at a valuation that our investors view as attractive relative to the value of our standalone business. Depending on the structure of any such Potential Transaction, New Summit may be required to seek the approval of the transaction from the stockholders of New Summit. In addition, the closing of any such transaction would be dependent upon a number of factors that may be beyond our control, including, among other factors, market condition and regulatory factors.

2026 Unsecured Notes Redemption

On June 7, 2024, the Partnership delivered a redemption notice with respect to all $209.5 million of the outstanding 2026 Unsecured Notes (as defined herein). The 2026 Unsecured Notes will be redeemable on June 22, 2024, which redemption (the “2026 Unsecured Notes Redemption”) will settle on Monday, June 24, 2024.

2026 Secured Notes Asset Sale Offer

On May 7, 2024, the Partnership commenced a cash tender offer to purchase up to $215.0 million aggregate principal amount of the outstanding 2026 Secured Notes (as defined herein) at 100% of the principal amount plus accrued and unpaid interest. The offer expired on June 5, 2024 with $6.9 million tendered and validly accepted.

Mountaineer Midstream Divestiture

On May 1, 2024, the Partnership completed the sale of its Mountaineer Midstream Company, LLC (“Mountaineer Midstream”) system to Antero Midstream LLC for a cash sale price of $70 million, subject to customary post-closing adjustments (the “Mountaineer Divestiture”). Mountaineer Midstream is the owner of midstream assets located in the Marcellus Shale. Prior to closing the Mountaineer Divestiture, the Partnership sold related compression assets located in the Marcellus Shale to a compression service provider for approximately $5 million in April 2024.

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2026 Secured Notes Excess Cash Flow Offer

On March 27, 2024, the Partnership commenced a cash tender offer to purchase up to $19.3 million aggregate principal amount of the outstanding 2026 Secured Notes at 100% of the principal amount plus accrued and unpaid interest. The offer expired on April 24, 2024 with $13.6 million tendered and validly accepted.

Summit Utica Divestiture

On March 22, 2024, the Partnership completed the disposition of Summit Utica, LLC (“Summit Utica”) to a subsidiary of MPLX LP (“MPLX”) for a cash sale price of $625.0 million, subject to customary post-closing adjustments (the “Utica Divestiture”). Summit Utica is the owner of (i) approximately 36% of the issued and outstanding equity interests in Ohio Gathering Company, L.L.C. (“OGC”), (ii) approximately 38% of the issued and outstanding equity interests in Ohio Condensate Company, L.L.C. (“OCC” and, collectively with OGC, “Ohio Gathering”) and (iii) midstream assets located in the Utica Shale. Ohio Gathering is the owner of a natural gas gathering system and condensate stabilization facility located in Belmont and Monroe counties in the Utica Shale in southeastern Ohio.

Summary of Risk Factors

You should consider carefully all the risk factors together with all of the other information included in this proxy statement/prospectus before deciding how to vote. The risks related to the Corporate Reorganization and the related transactions, the Partnership’s business, Common Stock, Series A Preferred Stock and risks resulting from New Summit’s organizational structure are described under “Risk Factors” beginning on page 28. Some of these risks include, but are not limited to, those described below:

Risks Related to the Corporate Reorganization

• The Corporate Reorganization is subject to conditions, including some conditions that may not be satisfied on a timely basis, if at all.

• We may enter into a range of strategic alternatives with potential counterparties that may be conditioned upon the consummation of the Corporate Reorganization.

• The unaudited pro forma financial information included in this proxy statement/prospectus is presented for illustrative purposes only and may not be an indication of New Summit’s financial condition or results of operations following the Utica Divestiture, the Mountaineer Divestiture and the Corporate Reorganization.

• The shares to be received by the holders of Common Units and the holders of Series A Preferred Units as a result of the Corporate Reorganization have different rights than the Common Units and the Series A Preferred Units.

Tax Risks Related to the Merger

• No ruling has been requested with respect to the tax consequences of the Merger, and the receipt of Series A Preferred Stock is expected to be taxable to a U.S. holder.

• U.S. holders will be allocated taxable income and gain of the Partnership (including gain from any asset sale, which may be substantial), through the time of the Merger and will not receive any corresponding future economic benefits, offsetting deductions or additional distributions attributable to that income or gain.

• The U.S. federal income tax treatment of owning and disposing of Common Stock received in the Merger will be different than the U.S. federal income tax treatment of owning and disposing of Common Units.

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Risks Related to Our Operations

• We may not have sufficient cash from operations following the establishment of cash reserves and payment of fees and expenses, to enable us to pay distributions to holders of our Series A Preferred Units and Common Units, or, upon consummation of the Corporate Reorganization, holders of New Summit’s Series A Preferred Stock and Common Stock.

• We depend on a relatively small number of customers for a significant portion of our revenues.

• We are exposed to the creditworthiness and performance of our customers, suppliers and contract counterparties and any material nonpayment or nonperformance by one or more of these parties could materially adversely affect our financial and operating results.

• Significant prolonged weakness in natural gas, NGL and crude oil prices could reduce throughput on our systems and materially adversely affect our revenues and results of operations.

• Because of the natural decline in production from our customers’ existing wells, our success depends in part on our customers replacing declining production and also on our ability to maintain levels of throughput on our systems.

• We may not be able to renew or replace expiring contracts at favorable rates or on a long-term basis.

• We do not own all of the land on which our pipelines and facilities are located, which could result in disruptions to our operations.

• Our ability to operate our business effectively could be impaired if we fail to attract and retain key personnel.

Risks Related to Our Finances

• Limited access to and/or availability of the commercial bank market or debt and equity capital markets could impair our ability to grow or cause us to be unable to meet future capital requirements.

• Our leverage and debt service obligations may adversely affect our financial condition, results of operations and business prospects, and may limit our flexibility to obtain financing and to pursue other business opportunities.

• We may not be able to generate sufficient cash to service all of our indebtedness and may be forced to take other actions to satisfy our obligations under our indebtedness or to refinance, which may not be successful.

• Restrictions in our debt instruments could materially adversely affect our business, financial condition, results of operations and ability to make cash distributions.

Regulatory and Environmental Policy Risks

• A change in laws and regulations applicable to our assets or services, or the interpretation or implementation of existing laws and regulations may cause our revenues to decline or our operation and maintenance expenses to increase.

• Increased regulation of hydraulic fracturing could result in reductions or delays in customer production, which could materially adversely impact our revenues.

• We are subject to Federal Energy Regulatory Commission (“FERC”) jurisdiction, federal anti-market manipulation laws and regulations, potentially other federal regulatory requirements and state and local regulation and could be materially affected by changes in such laws and regulations, or in the way they are interpreted and enforced.

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• We are subject to stringent environmental laws and regulations that may expose us to significant costs and liabilities.

• Climate change legislation, regulatory initiatives and litigation could result in increased operating costs and reduced demand for the services we provide.

• We may face opposition to the development, permitting, construction or operation of our pipelines and facilities from various groups.

Risks Related to Terrorism and Cyberterrorism

• Terrorist attacks and threats, escalation of military activity in response to these attacks, or acts of war could have a material adverse effect on our business, financial condition or results of operations.

• Our operations depend on the use of information technology and operational technology systems that could be the target of a cyberattack.

Risks Related to the Common Stock and Series A Preferred Stock

• The price of the Common Stock or Series A Preferred Stock may experience volatility.

• New Summit does not expect to pay dividends on its Common Stock for the foreseeable future.

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SELECTED HISTORICAL CONSOLIDATED FINANCIAL DATA OF THE PARTNERSHIP

The following tables set forth the Partnership’s selected historical consolidated financial data derived from the Partnership’s unaudited condensed consolidated financial statements as of March 31, 2024 and for the three months ended March 31, 2024 and 2023, respectively (the “Interim Financial Statements”), and from the Partnership’s audited consolidated financial statements as of December 31, 2023 and 2022 and for each of the years ended December 31, 2023 and 2022 (the “Annual Financial Statements”). You should read the following data in conjunction with “Management’s Discussion and Analysis of Financial Condition and Results of Operations of the Partnership” and the consolidated financial statements and the related notes thereto included within this proxy statement/prospectus. You should not assume the results of operations for any past period indicate results for any future period.

	Three Months Ended March 31,						Year Ended December 31,
	2024			2023			2023			2022
	(in thousands, except per unit data)
Statement of Operations Data:
Revenues:
Gathering services and related fees	$	61,985		$	57,371		$	248,223		$	248,358
Natural gas, NGLs and condensate sales		49,092			49,163			179,254			86,225
Other revenues		7,794			5,965			31,426			35,011
Total revenues		118,871			112,499			458,903			369,594
Costs and expenses:
Cost of natural gas and NGLs		30,182			30,882			112,462			76,826
Operation and maintenance		25,012			23,972			100,741			84,152
General and administrative		14,785			9,987			42,135			44,943
Depreciation and amortization		27,867			29,824			122,764			119,055
Transaction costs		7,791			302			1,251			6,968
Acquisition integration costs		40			1,502			2,654			—
Gain on asset sales, net		(27	)		(68	)		(260	)		(507	)
Long-lived asset impairment		67,916			—			540			91,644
Total costs and expenses		173,566			96,401			382,287			423,081
Other income (expense), net		(13	)		56			865			(4	)
Gain (loss) on interest rate swaps		2,590			(1,273	)		1,830			16,414
Gain (loss) on sale of business		86,202			18			(47	)		(1,741	)
Gain on sale of equity method investment		126,261			—			—			—
Interest expense		(37,846	)		(34,223	)		(140,784	)		(102,459	)
Loss on early extinguishment of debt		—			—			(10,934	)		—
Income (loss) before income taxes and equity method investment income		122,499			(19,324	)		(72,454	)		(141,277	)
Income tax benefit (expense)		(210	)		252			(322	)		(325	)
Income from equity method investees		10,638			4,909			33,829			18,141
Net income (loss)	$	132,927		$	(14,163	)	$	(38,947	)	$	(123,461	)
Less: Net income attributable to Subsidiary Series A Preferred Units		(3,770	)		(1,746	)		(12,581	)		(17,144	)
Net income (loss) attributable to Summit Midstream Partners, LP	$	129,157		$	(15,909	)	$	(51,528	)	$	(140,605	)
Less: net income attributable to Series A Preferred Units		(3,220	)		(2,639	)		(11,566	)		(8,048	)
Add: deemed capital contribution		—			—			—			20,974
Net income (loss) attributable to common limited partners	$	125,937		$	(18,548	)	$	(63,094	)	$	(127,679	)
Net loss per limited partner unit:
Common unit – basic	$	12.05		$	(1.82	)	$	(6.11	)	$	(12.71	)
Common unit – diluted	$	11.47		$	(1.82	)	$	(6.11	)	$	(12.71	)

Weighted-average limited partner units outstanding:
Common unit – basic		10,449			10,213			10,334			10,048
Common unit – diluted		10,980			10,213			10,334			10,048

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	As of March 31, 2024		As of December 31,
	As of March 31, 2024		2023		2022
	(in thousands)
Balance Sheet Data
Assets
Cash and cash equivalents	$	344,590	$	14,044	$	11,808
Restricted cash		3,454		2,601		1,723
Accounts receivable		66,587		76,275		75,287
Other current assets		5,935		5,502		8,724
Total current assets		420,566		98,422		97,542
Property, plant and equipment, net		1,447,443		1,698,585		1,718,754
Intangible assets, net		147,304		175,592		198,718
Investment in equity method investees		273,476		486,434		506,677
Other noncurrent assets		31,786		35,165		38,273
Total assets	$	2,320,575	$	2,494,198	$	2,559,964

Liabilities and Capital
Trade accounts payable	$	18,063	$	22,714	$	14,052
Accrued expenses		36,554		32,377		20,601
Deferred revenue		8,899		10,196		9,054
Ad valorem taxes payable		3,282		8,543		10,245
Accrued compensation and employee benefits		2,824		6,815		16,319
Accrued interest		44,826		19,298		17,355
Accrued environmental remediation		1,854		1,483		1,365
Accrued settlement payable		6,667		6,667		6,667
Current portion of long-term debt		29,098		15,524		10,507
Other current liabilities		7,476		10,395		11,724
Total current liabilities		159,543		134,012		117,889
Long-term debt, net		1,127,287		1,455,166		1,479,855
Noncurrent deferred revenue		28,761		30,085		37,694
Noncurrent accrued environmental remediation		1,278		1,454		2,340
Other noncurrent liabilities		28,298		30,266		38,784
Total liabilities		1,345,167		1,650,983		1,676,562

Mezzanine Capital
Subsidiary Series A Preferred Units (93,039 units issued and outstanding at March 31, 2024, December 31, 2023 and December 31, 2022)		126,794		124,652		118,584

Partners Capital
Series A Preferred Units (65,508 units issued and outstanding at March 31, 2024, December 31, 2023 and December 31, 2022)		100,113		96,893		85,327
Common limited partner capital (10,648,685, 10,376,189 and 10,182,763 units issued and outstanding at March 31, 2024, December 31, 2023 and December 31, 2022, respectively)		748,501		621,670		679,491
Total partners capital		848,614		718,563		764,818
Total liabilities and Capital	$	2,320,575	$	2,494,198	$	2,559,964

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Non-GAAP Financial Measures

The Partnership reports financial results in accordance with U.S. generally accepted accounting principles (“GAAP”). The Partnership also presents adjusted EBITDA, a non-GAAP financial measure.

Adjusted EBITDA

The Partnership defines adjusted EBITDA as net income or loss, plus interest expense, income tax expense, depreciation and amortization, the Partnership’s proportional adjusted EBITDA for equity method investees, adjustments related to minimum volume commitment (“MVC”) shortfall payments, adjustments related to capital reimbursement activity, unit-based and noncash compensation, impairments, items of income or loss that the Partnership characterizes as unrepresentative of its ongoing operations and other noncash expenses or losses, income tax benefit, income (loss) from equity method investees and other noncash income or gains. Because adjusted EBITDA may be defined differently by other entities in the Partnership’s industry, the Partnership’s definition of this non-GAAP financial measure may not be comparable to similarly titled measures of other entities, thereby diminishing its utility.

The Partnership’s management uses adjusted EBITDA in making financial, operating and planning decisions and in evaluating the Partnership’s financial performance. Furthermore, the Partnership’s management believes that adjusted EBITDA may provide external users of the Partnership’s financial statements, such as investors, commercial banks, research analysts and others, with additional meaningful comparisons between current results and results of prior periods as they are expected to be reflective of the Partnership’s core ongoing business.

Adjusted EBITDA is used as a supplemental financial measure to assess:

• the ability of the Partnership’s assets to generate cash sufficient to make future potential cash distributions and support the Partnership’s indebtedness;

• the financial performance of the Partnership’s assets without regard to financing methods, capital structure or historical cost basis;

• the Partnership’s operating performance and return on capital as compared to those of other entities in the midstream energy sector, without regard to financing or capital structure;

• the attractiveness of capital projects and acquisitions and the overall rates of return on alternative investment opportunities; and

• the financial performance of the Partnership’s assets without regard to (i) income or loss from equity method investees, (ii) the impact of the timing of MVC shortfall payments under the Partnership’s gathering agreements or (iii) the timing of impairments or other income or expense items that the Partnership characterizes as unrepresentative of the Partnership’s ongoing operations.

Adjusted EBITDA has limitations as an analytical tool and investors should not consider it in isolation or as a substitute for analysis of the Partnership’s results as reported under GAAP. For example:

• certain items excluded from adjusted EBITDA are significant components in understanding and assessing an entity’s financial performance, such as an entity’s cost of capital and tax structure;

• adjusted EBITDA does not reflect the Partnership’s cash expenditures or future requirements for capital expenditures or contractual commitments;

• adjusted EBITDA does not reflect changes in, or cash requirements for, the Partnership’s working capital needs; and

• although depreciation and amortization are noncash charges, the assets being depreciated and amortized will often have to be replaced in the future, and adjusted EBITDA does not reflect any cash requirements for such replacements.

The Partnership compensates for the limitations of adjusted EBITDA as an analytical tool by reviewing the comparable GAAP financial measures, understanding the differences between the financial measures and incorporating these data points into the Partnership’s decision-making process.

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The Partnership does not provide the GAAP financial measures of net income or loss or net cash provided by operating activities on a forward-looking basis because the Partnership is unable to predict, without unreasonable effort, certain components thereof including, but not limited to, (i) income or loss from equity method investees and (ii) asset impairments. These items are inherently uncertain and depend on various factors, many of which are beyond the Partnership’s control. As such, any associated estimate and its impact on the Partnership’s GAAP performance and cash flow measures could vary materially based on a variety of acceptable management assumptions.

The following tables present a reconciliation of the Partnership’s net income and net cash provided by operating activities to adjusted EBITDA for the three months ended March 31, 2024 and 2023, respectively, and for the years ended December 31, 2023 and 2022, respectively.

	Three Months Ended March 31,						Year Ended December 31,
	2024			2023			2023			2022
	(in thousands)
Reconciliation of net income to adjusted EBITDA:
Net Income (loss)	$	132,927		$	(14,163	)	$	(38,947	)	$	(123,461	)
Add:
Interest expense		37,846			34,223			140,784			102,459
Income tax expense (benefit)		210			(252	)		322			325
Depreciation and amortization(1)		28,102			30,059			123,702			119,993
Proportional adjusted EBITDA for equity method investees(2)		20,675			11,638			61,070			45,419
Adjustments related to capital reimbursement activity(3)		(2,923	)		(1,186	)		(9,874	)		(6,041	)
Unit-based and noncash compensation		2,772			1,929			6,566			3,778
Loss on early extinguishment of debt		—			—			10,934			—
Gain on asset sales, net		(27	)		(68	)		(260	)		(507	)
Long-lived asset impairment		67,916			—			540			91,644
(Gain) loss on interest rate swaps		(2,590	)		1,273			(1,830	)		(16,414	)
Gain on sale of business		(86,202	)		—			—			—
Gain on sale of equity method investment		(126,261	)		—			—			—
Other, net(4)		8,252			1,891			7,666			13,236
Less:
Income from equity method investees		10,638			4,909			33,829			18,141
Adjusted EBITDA	$	70,059		$	60,435		$	266,844		$	212,290

____________

(1) Includes the amortization expense associated with the Partnership’s favorable gas gathering contracts as reported in other revenues.

(2) Reflects the Partnership’s proportionate share of Double E and Ohio Gathering adjusted EBITDA. The Partnership records financial results of its investment in Ohio Gathering on a one-month lag and is based on the financial information available to the Partnership during the reporting period. With the divestiture of Ohio Gathering in March 2024, proportional adjusted EBITDA includes financial results from December 1, 2023 through March 22, 2024.

(3) Adjustments related to capital reimbursement activity represent contributions in aid of construction revenue recognized in accordance with Accounting Standards Update No. 2014-09 Revenue from Contracts with Customers.

(4) Represents items of income or loss that the Partnership characterizes as unrepresentative of its ongoing operations. For the three months ended March 31, 2024, the amount includes $8.0 million of transaction and other costs. For the three months ended March 31, 2023, the amount includes $1.5 million of integration costs. For the year ended December 31, 2023, the amount includes $3.8 million in transaction costs, $2.6 million of acquisition integration costs, and $1.6 million of severance expenses. For the year ended December 31, 2022, the amount includes the amount includes $8.6 million in transaction costs, $2.5 million of severance expenses and $1.7 million of losses related to sale of business.

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	Three Months Ended March 31,						Year Ended December 31,
	2024			2023			2023			2022
	(in thousands)
Reconciliation of net cash provided by operating activities to adjusted EBITDA:
Net cash provided by operating activities	$	43,616		$	49,695		$	126,906		$	98,744
Add:
Interest expense, excluding amortization of debt issuance costs		34,341			31,062			128,099			93,133
Income tax expense (benefit)		210			(252	)		322			325
Changes in operating assets and liabilities		(14,656	)		(20,114	)		19,692			13,538
Proportional adjusted EBITDA for equity method investees(1)		20,675			11,638			61,070			45,419
Adjustments related to capital reimbursement activity(2)		(2,923	)		(1,186	)		(9,874	)		(6,041	)
Realized gain (loss) on swaps		(1,346	)		379			(5,149	)		(397	)
Other, net(3)		8,252			400			7,123			11,494
Less:
Distributions from equity method investees		17,082			10,403			57,572			43,040
Noncash lease expense		1,009			784			3,773			885
Adjusted EBITDA	$	70,059		$	60,435		$	266,844		$	212,290

____________

(1) Reflects the Partnership’s proportionate share of Double E and Ohio Gathering adjusted EBITDA. The Partnership records financial results of its investment in Ohio Gathering on a one-month lag and is based on the financial information available to the Partnership during the reporting period. With the divestiture of Ohio Gathering in March 2024, proportional adjusted EBITDA includes financial results from December 1, 2023 through March 22, 2024.

(2) Adjustments related to capital reimbursement activity represent contributions in aid of construction revenue recognized in accordance with Accounting Standards Update No. 2014-09 Revenue from Contracts with Customers.

(3) Represents items of income or loss that the Partnership characterizes as unrepresentative of its ongoing operations. For the three months ended March 31, 2024, the amount includes $8.0 million of transaction and other costs. For the three months ended March 31, 2023, the amount includes $1.5 million of integration costs. For the year ended December 31, 2023, the amount includes $3.8 million in transaction costs, $2.6 million of acquisition integration costs, and $1.6 million of severance expenses. For the year ended December 31, 2022, the amount includes the amount includes $8.6 million in transaction costs, $2.5 million of severance expenses and $1.7 million of losses related to sale of business.

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SUMMARY SELECTED UNAUDITED PRO FORMA CONDENSED
CONSOLIDATED FINANCIAL INFORMATION

The following sets forth summary selected unaudited pro forma condensed consolidated financial information for New Summit after giving effect to the Partnership’s historical financial position and operating results of (i) the Mountaineer Divestiture, (ii) the Utica Divestiture and (iii) the Corporate Reorganization.

The summary selected unaudited pro forma condensed consolidated financial information is for information purposes only and is not necessarily indicative of the results that might have occurred had the (i) Mountaineer Divestiture, (ii) Utica Divestiture and (iii) Corporate Reorganization taken place on the respective dates assumed. Actual results may differ significantly from those reflected in the summary selected unaudited pro forma condensed consolidated financial information for various reasons, including but not limited to, the differences between the assumptions used to prepare the summary selected unaudited pro forma condensed consolidated financial information and actual results.

The following summary selected unaudited pro forma condensed consolidated financial information should be read in conjunction with the section titled “Unaudited Pro Forma Condensed Consolidated Financial Information” beginning on page 104 and the related notes.

Pro Forma Condensed Consolidated Balance Sheet Data	As of March 31, 2024
	(In thousands)
Cash and cash equivalents	$	202,651
Total assets	$	2,098,230
Long-term debt, net	$	920,443
Mezzanine Capital
Subsidiary Series A Preferred Units	$	126,794
Partners’ Capital
Total partners’ capital(1)	$	680,568

____________

(1) Upon completion of the Merger, the Partnership’s common limited partner capital account will be eliminated and replaced with common shares, paid in capital, and retained earnings. Additionally, the Series A Preferred Units will be exchanged for an equivalent number of shares of Series A Preferred Stock, with no substantive changes in contractual terms or investor cash flows.

Pro Forma Condensed Consolidated Statement of Operations Data	Three Months Ended March 31, 2024			Year Ended December 31, 2023
	(In thousands, except per-unit amounts)
Total revenues	$	102,018		$	395,098
Net income (loss) attributable to common limited partners	$	(18,216	)	$	(91,835	)
Basic net income (loss) per limited partner unit	$	(1.74	)	$	(8.89	)
Diluted net income (loss) per limited partner unit	$	(1.74	)	$	(8.89	)

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MARKET PRICE INFORMATION

The Common Units are traded on NYSE under the ticker symbol “SMLP.” The following table sets forth, for the periods indicated, the range of high and low sales prices for the Common Units on NYSE. The sales prices are as reported in published financial sources.

	Common Units
	High		Low
2022
First Quarter	$	26.22	$	13.91
Second Quarter	$	21.49	$	12.50
Third Quarter	$	17.85	$	11.52
Fourth Quarter	$	21.49	$	14.67
2023
First Quarter	$	19.35	$	14.78
Second Quarter	$	17.44	$	13.78
Third Quarter	$	16.38	$	13.00
Fourth Quarter	$	21.40	$	13.52
2024
First Quarter	$	28.70	$	15.56
Second Quarter (through May 28, 2024)	$	36.00	$	27.00

As of the Record Date for the Special Meeting, there were 10,648,686 Common Units outstanding held by 77 holders of record, and there were 65,508 Series A Preferred Units outstanding held by 1 holder of record. The Partnership Agreement requires, within 45 days after the end of each fiscal quarter, the Partnership to distribute all of its Available Cash (as defined in the Partnership Agreement), to holders of record of the Common Units on the applicable record date. The Partnership Agreement also requires the Partnership to make quarterly distributions to holders of record of the Series A Preferred Stock at the Series A Distribution Rate (as defined in the Partnership Agreement). Although the Partnership has suspended distributions to the holders of Common Units and the holders of Series A Preferred Units, such distributions continue to accrue in arrears. Pursuant to the terms of the Partnership Agreement, the Partnership is required to pay or set aside for payment all accrued but unpaid distributions with respect to the Series A Preferred Units prior to or contemporaneously with making any distribution with respect to the Common Units.

The following table presents closing prices for Common Units on March 21, 2024, the last trading day before the public announcement of the Corporate Reorganization, and June 13, 2024, the last practicable trading day prior to the printing of this proxy statement/prospectus, as reported on NYSE.

	Common Units
March 21, 2024	$	19.43
June 13, 2024	$	31.00

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RISK FACTORS

In addition to the other information included in this proxy statement/prospectus, including the matters addressed in the section titled “Cautionary Statement Regarding Forward-Looking Statements,” you should carefully consider the following risks before deciding whether to vote for the approval of the applicable proposals described in this proxy statement/prospectus. Realization of any of the risks described below or any of the events described under “Cautionary Statement Regarding Forward-Looking Statements” could have a material adverse effect on the Partnership’s or, following the consummation of the Corporate Reorganization, New Summit’s business, financial condition, cash flows and results of operations and could result in a decline in the price of Common Stock or Series A Preferred Stock and for the trading prices of Common Units or the Series A Preferred Units.

Unless the context provides otherwise, when used in this “Risk Factors,” references to “we,” “us” and “our” or like terms refer to (i) the Partnership, prior to the consummation of the Corporate Reorganization, and (ii) New Summit, after giving effect to the consummation of the Corporate Reorganization.

Risks Related to the Corporate Reorganization

The Corporate Reorganization is subject to conditions, including some conditions that may not be satisfied on a timely basis, if at all. Failure to complete the Corporate Reorganization, or significant delays in completing the Corporate Reorganization, could negatively affect the Partnership’s business and financial results and the price of the Common Units or Series A Preferred Units or, following the consummation of the Corporate Reorganization, future business and financial results and the price of the Common Stock or the Series A Preferred Stock.

The consummation of the Corporate Reorganization is subject to a number of conditions. The consummation of the Corporate Reorganization is not assured and is subject to risks, including the risk that the approval of the Merger by the holders of Common Units is not obtained. Further, the Corporate Reorganization may not be consummated even if such unitholder approval is obtained. The Merger Agreement contains conditions, some of which are beyond the parties’ control, that, if not satisfied or waived, may prevent, delay or otherwise result in the Merger and the Corporate Reorganization not being consummated. See “The Merger Agreement — Conditions to Consummation of the Merger.”

If the Corporate Reorganization is not completed, or if there are significant delays in completing the Corporate Reorganization, the Partnership’s future business and financial results and the trading price of the Common Units or Series A Preferred Units could be negatively affected or, following the consummation of the Corporate Reorganization, New Summit’s future business and financial results and the price of the Common Stock or Series A Preferred Stock could be negatively affected, and the parties will be subject to several risks, including the following:

• there may be negative reactions from the financial markets due to the fact that the current price of the Common Units may reflect a market assumption that the Corporate Reorganization will be completed; and

• the attention of management will have been diverted to the Corporate Reorganization rather than the Partnership’s own operations and pursuit of other opportunities that could have been beneficial to the Partnership’s business.

We may enter into a range of strategic alternatives with potential counterparties that may be conditioned upon the consummation of the Corporate Reorganization.

We regularly evaluate a range of strategic alternatives and engage in discussions with unaffiliated third-parties. Those discussions have included and continue to include significant strategic transactions in which the potential counterparty would acquire control of the Partnership or, after the Corporate Reorganization, New Summit. The Corporate Reorganization is not contingent upon the entry into or consummation of a Potential Transaction and the GP Board expects to proceed with the Corporate Reorganization regardless of the status of any Potential Transaction. However, we expect that any Potential Transaction would be contingent upon the consummation of the Corporate Reorganization. If the Corporate Reorganization is not consummated or the consummation of the Corporate Reorganization is delayed, our pursuit of strategic alternatives may be delayed or abandoned and we may not realize the anticipated benefits of any such strategic alternative.

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There can be no assurance that these discussions will result in the consummation of a Potential Transaction. If the GP Board decides to proceed with a Potential Transaction, or any other strategic alternative, it may not be at a valuation that our investors view as attractive relative to the value of our standalone business. Depending on the structure of any such Potential Transaction, or any other strategic alternative, New Summit may be required to seek the approval of the transaction from the stockholders of New Summit. In addition, the closing of any such transaction would be dependent upon a number of factors that may be beyond our control, including, among other factors, market condition and regulatory factors. See “Summary — Recent Developments.”

If the Corporate Reorganization is approved by the holders of Common Units, the date that the holders of Common Units and the holders of Series A Preferred Units will receive the Merger Consideration is uncertain.

As described in this proxy statement/prospectus, completing the proposed Corporate Reorganization is subject to several conditions, not all of which are controllable by the Partnership or New Summit. Accordingly, if the proposed Corporate Reorganization is approved by the holders of Common Units, the date that the holders of Common Units and the holders of Series A Preferred Units will receive Merger Consideration depends on the completion date of the Corporate Reorganization, which is uncertain.

The Partnership will incur substantial transaction-related costs in connection with the Corporate Reorganization.

The Partnership expects to incur substantial expenses in connection with completing the Corporate Reorganization, including fees paid to legal, financial, accounting and other advisors, filing fees and printing costs. Many of the expenses that will be incurred, by their nature, are difficult to estimate accurately at the present time.

Certain executive officers and directors of the General Partner have interests in the Corporate Reorganization that are different from, or in addition to, the interests they may have as unitholders, which could have influenced their decision to support or approve the Corporate Reorganization.

Certain executive officers and directors of the General Partner are parties to agreements or participants in other arrangements that give them interests in the Corporate Reorganization that may be different from, or be in addition to, your interests as a unitholder. These different interests are described in “The Corporate Reorganization — Interests of Certain Persons in the Merger.”

The unaudited pro forma financial information included in this proxy statement/prospectus is presented for illustrative purposes only and may not be an indication of New Summit’s financial condition or results of operations following the Utica Divestiture, the Mountaineer Divestiture and the Corporate Reorganization.

The unaudited pro forma financial information contained in this proxy statement/prospectus is presented for illustrative purposes only, is based on various adjustments, assumptions and preliminary estimates and may not be an indication of the financial condition or results of operations of New Summit following the Utica Divestiture, the Mountaineer Divestiture and the Corporate Reorganization for several reasons. The actual financial condition and results of operations of New Summit following the Utica Divestiture, the Mountaineer Divestiture and the Corporate Reorganization may not be consistent with, or evident from, this pro forma financial information. In addition, the assumptions used in preparing the pro forma financial information may not prove to be accurate, and other factors may affect the financial condition or results of operations of New Summit following the Utica Divestiture, the Mountaineer Divestiture and the Corporate Reorganization. Any potential decline in the financial condition or results of operations of New Summit following the Utica Divestiture, the Mountaineer Divestiture and the Corporate Reorganization may cause significant variations in the price of Common Stock or Series A Preferred Stock after consummation of the Corporate Reorganization. See “Summary — Summary Selected Unaudited Pro Forma Condensed Consolidated Financial Information.”

The shares to be received by the holders of Common Units and the holders of Series A Preferred Units as a result of the Corporate Reorganization have different rights than the Common Units and the Series A Preferred Units.

Following consummation of the Corporate Reorganization, holders of Common Units and holders of Series A Preferred Units will no longer hold Common Units or Series A Preferred Units but will instead hold Common Stock and Series A Preferred Stock, respectively. There are important differences between the rights of holders of Common Units and holders of Series A Preferred Units and the rights of holders of Common Stock and holders of

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Series A Preferred Stock, respectively. Ownership interests in a limited partnership are fundamentally different from ownership interests in a corporation. The holders of Common Units and the holders of Series A Preferred Units will own Common Stock and Series A Preferred Stock, respectively, following the completion of the Corporate Reorganization, and their rights associated with the Common Stock and Series A Preferred Stock, as applicable, will be governed by New Summit’s organizational documents and the DGCL, which differ in a number of respects from the Partnership Agreement and the Delaware LP Act. See “Comparison of the Rights of Stockholders and Unitholders.”

Tax Risks Related to the Merger

In addition to reading the following risk factors, you are urged to read “Material U.S. Federal Income Tax Consequences” for a more complete discussion of the expected material U.S. federal income tax consequences of the Merger and of owning and disposing of Common Stock received in the Merger.

No ruling has been requested with respect to the tax consequences of the Merger, and the receipt of Series A Preferred Stock is expected to be taxable to a U.S. holder.

It is generally intended that the Merger will qualify as an exchange described in Section 351 of the Code with respect to U.S. holders (as defined in “Material U.S. Federal Income Tax Consequences”). Accordingly, U.S. holders will generally not recognize any gain or loss as a result of the exchange of Common Units in the Merger (other than gain that may be recognized to the extent that the aggregate amount of Partnership liabilities allocable to such U.S. holder immediately prior to the Merger exceeds such U.S. holder’s basis in its Common Units). However, no ruling has been or will be requested from the IRS with respect to the tax consequences of the Merger. Under certain circumstances, the Merger may be treated as a taxable transaction to a U.S. holder, and result in tax liability, for the U.S. holder, depending on such U.S. holder’s particular situation.

The material U.S. federal income tax consequences of the receipt of any Series A Preferred Stock by U.S. holders in the Merger depends on, among other factors, whether the Series A Preferred Stock is “nonqualified preferred stock” for U.S. federal income tax purposes. The receipt of nonqualified preferred stock in a reorganization that otherwise qualifies as a tax-free reorganization under Section 351 of the Code for U.S. federal income tax purposes will generally be taxable. We expect to treat the Series A Preferred Stock as “nonqualified preferred stock” within the meaning of Section 351(g) of the Code. No ruling is being obtained from the IRS concerning the classification of the Series A Preferred Stock as nonqualified preferred stock. The U.S. federal income tax consequences of the Merger to holders of Series A Preferred Units are complex, and each such unitholder is strongly urged to consult its own tax advisor with respect to the specific tax consequences of receiving Series A Preferred Stock in the Merger.

Even if the Merger otherwise generally qualifies for tax-free treatment to U.S. holders, a U.S. holder will recognize gain upon the exchange of Common Units in the Merger if and to the extent that (i) the aggregate amount of Partnership liabilities allocable to such U.S. holder immediately prior to the Merger exceeds (ii) the U.S. holder’s aggregate tax basis in the Common Units exchanged by such U.S. holder.

Even if, as generally intended, the Merger qualifies as a transaction described in Section 351 of the Code with respect to U.S. holders, if a corporation assumes (or, is treated for U.S. federal income tax purposes as having assumed) liabilities of the transferor (or accepts property subject to liabilities) in an exchange described in Section 351 of the Code, the transferor generally must recognize gain under Section 357(c) of the Code in the amount by which the aggregate liabilities exceed the transferor’s basis in the property contributed to the corporation. The liabilities of the Partnership are allocated to the U.S. holders under Section 752 of the Code, and as a result of the Merger, the aggregate Partnership liabilities allocated to the U.S. holders will be treated as having been assumed by New Summit and will be subject to Section 357(c) of the Code. Accordingly, a U.S. holder will recognize gain upon the exchange in the Merger if and to the extent that (i) the aggregate amount of Partnership liabilities allocable to such U.S. holder immediately prior to the Merger exceeds (ii) the U.S. holder’s aggregate tax basis in the Common Units exchanged by the U.S. holder. For more information on the material U.S. federal income tax consequences of the Merger, see “Material U.S. Federal Income Tax Consequences.”

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U.S. holders will be allocated taxable income and gain of the Partnership (including gain from any asset sale, which may be substantial), through the time of the Merger and will not receive any corresponding future economic benefits, offsetting deductions or additional distributions attributable to that income or gain.

U.S. holders will be allocated their proportionate share of the Partnership’s taxable income and gain (including gain from any asset sale, which may be substantial) for the period ending at the time of the Merger. U.S. holders will have to report, and pay taxes on, such income and gain without corresponding future economic benefits, offsetting tax deductions, or any additional distributions to fund the payment of the resulting tax liability attributable to that income and gain.

The U.S. federal income tax treatment of owning and disposing of Common Stock received in the Merger will be different than the U.S. federal income tax treatment of owning and disposing of Common Units.

The Partnership is classified as a partnership for U.S. federal income tax purposes and, generally, is not subject to entity-level U.S. federal income taxes. Instead, each U.S. holder receives a Schedule K-1 from the Partnership and is required to take into account its respective share of the Partnership’s items of income, gain, loss and deduction in computing its federal income tax liability as if the U.S. holder had earned such income directly, even if no cash distributions are made to the unitholder. A pro rata distribution of cash by the Partnership to a U.S. holder is generally not taxable for U.S. federal income tax purposes unless the amount of cash distributed exceeds the U.S. holder’s adjusted tax basis in its Common Units.

In contrast, New Summit is classified as a corporation for U.S. federal income tax purposes and is subject to U.S. federal income tax on its taxable income. As such, equity owners will no longer receive Schedules K-1. Any future distribution of cash by New Summit to a stockholder who is a U.S. holder generally will be included in such U.S. holder’s income as dividend income to the extent of New Summit’s current or accumulated “earnings and profits,” as determined under U.S. federal income tax principles, and will be reported to such owner on Form 1099-DIV. A portion of the cash distributed to stockholders by New Summit after the Merger may exceed New Summit’s current and accumulated earnings and profits. Cash distributions in excess of New Summit’s current and accumulated earnings and profits will be treated as a non-taxable return of capital, reducing a U.S. holder’s adjusted tax basis in such stockholder’s shares and, to the extent the cash distribution exceeds such stockholder’s adjusted tax basis, as gain from the sale or exchange of such shares. See “Material U.S. Federal Income Tax Consequences.”

Risks Related to Our Operations

We may not have sufficient cash from operations following the establishment of cash reserves and payment of fees and expenses, to enable us to pay distributions to holders of our Series A Preferred Units and Common Units, or, upon consummation of the Corporate Reorganization, holders of New Summit’s Series A Preferred Stock and Common Stock.

We may not have sufficient available cash from operating surplus each quarter to pay the distributions to holders of our Series A Preferred Units and Common Units, or, upon consummation of the Corporate Reorganization, holders of New Summit’s Series A Preferred Stock and Common Stock. We have not made a distribution on our Common Units or Series A Preferred Units since we announced suspension of those distributions on May 3, 2020. Because our Series A Preferred Units rank senior to our Common Units with respect to distribution rights, any accrued amounts on our Series A Preferred Units must first be paid prior to our resumption of distributions to our holders of Common Units. As of March 31, 2024, the amount of accrued and unpaid distributions on the Series A Preferred Units totaled $36.3 million.

Further, absent a material change to our business, we do not expect to pay distributions on the Common Units or Series A Preferred Units, or, upon consummation of the Corporate Reorganization, New Summit’s Common Stock or Series A Preferred Stock, in the foreseeable future, and there are restrictions on our ability to pay distributions under our outstanding indebtedness that restrict our ability to pay cash distributions on any of our equity securities. We intend to use our cash flow to reduce debt and invest in our business.

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The amount of cash we can distribute on our Common Units, and, upon consummation of the Corporate Reorganization, New Summit’s Common Stock, principally depends upon the amount of cash we generate from our operations, which will fluctuate from quarter to quarter based on, among other things:

• the volumes we gather, transport, treat and process;

• the level of production of natural gas and crude oil (and associated volumes of produced water) from wells connected to our gathering systems, which is dependent in part on the demand for, and the market prices of, crude oil, natural gas and natural gas liquids (“NGLs”);

• damage to pipelines, facilities, related equipment and surrounding properties caused by earthquakes, floods, fires, severe weather, explosions and other natural disasters, accidents and acts of terrorism;

• leaks or accidental releases of hazardous materials into the environment;

• weather conditions and seasonal trends;

• changes in the fees we charge for our services;

• changes in contractual MVCs and our customer’s capacity to make MVC shortfall payments when due;

• the level of competition from other midstream energy companies in our areas of operation;

• changes in the level of our operating, maintenance and general and administrative expenses;

• regulatory action affecting the supply of, or demand for, crude oil, natural gas and NGLs, the fees we can charge, how we contract for services, our existing contracts, our operating and maintenance costs or our operating flexibility;

• adverse economic impacts from the COVID-19 pandemic or other epidemics, including disruptions in demand for oil, natural gas and other petroleum products, supply chain disruptions, and decreased productivity resulting from illness, travel restrictions, quarantine, or government mandates; and

• prevailing economic and market conditions.

In addition, the actual amount of cash we have available for distribution to our holders of Common Units, and, upon consummation of the Corporate Reorganization, holders of New Summit’s Common Stock, depends on other factors, some of which are beyond our control, including:

• the level and timing of capital expenditures we make;

• the level of our operating, maintenance and general and administrative expenses;

• the cost of acquisitions, if any;

• our ability to sell assets, if any, and the price that we may receive for such assets;

• our debt service requirements and other liabilities;

• fluctuations in our working capital needs;

• our ability to borrow funds and access the debt and equity capital markets;

• restrictions contained in our debt agreements;

• the amount of cash reserves established by our General Partner;

• not receiving anticipated shortfall payments from our customers;

• adverse legal judgments, fines and settlements;

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• distributions paid on our Series A Preferred Units, and, upon consummation of the Corporate Reorganization, New Summit’s Series A Preferred Stock, if any, or on the preferred stock of our subsidiaries, including the Series A Fixed Rate Cumulative Redeemable Preferred Units issued by Summit Permian Transmission Holdco, LLC (“Permian Holdco”); and

• other business risks affecting our cash levels.

We depend on a relatively small number of customers for a significant portion of our revenues. For example, Caerus, a customer in our Piceance segment accounts for over 10% of our consolidated revenue. The loss of, or material nonpayment or nonperformance by, or the curtailment of production by, any one or more of our customers could materially adversely affect our revenues, cash flows and results of operations.

Certain of our customers may have material financial and liquidity issues or may, as a result of operational incidents or other events, be disproportionately affected as compared to larger, better-capitalized companies. Any material nonpayment or nonperformance by any of our customers could have a material adverse effect on our revenues, cash flows and results of operations. We expect our exposure to concentrated risk of nonpayment or nonperformance to continue as long as we remain substantially dependent on a relatively small number of customers for a significant portion of our revenues.

If any of our customers curtail or reduce production in our areas of operation, it could reduce throughput on our systems and, therefore, materially adversely affect our revenues, cash flows and results of operations.

Further, we are subject to the risk of non-payment or non-performance by our larger customers. We cannot predict the extent to which our customers’ businesses would be impacted if conditions in the energy industry deteriorate, nor can we estimate the impact such conditions would have on any of our customers’ abilities to execute their drilling and development programs or perform under our gathering and processing agreements. An extended low commodity price environment negatively impacts natural gas producers causing some producers in the industry significant economic stress, including, in certain cases, to file for bankruptcy protection or to renegotiate contracts. To the extent that any customer is in financial distress or commences bankruptcy proceedings, contracts with these customers may be subject to renegotiation or rejection under applicable provisions of the United States Bankruptcy Code. Any material non-payment or non-performance by our customers could adversely affect our business and operating results.

We are exposed to the creditworthiness and performance of our customers, suppliers and contract counterparties and any material nonpayment or nonperformance by one or more of these parties could materially adversely affect our financial and operating results.

Although we attempt to assess the creditworthiness and associated liquidity of our customers, suppliers and contract counterparties, there can be no assurance that our assessments will be accurate or that there will not be a rapid or unanticipated deterioration in their creditworthiness, which may have an adverse impact on our business, results of operations, financial condition and cash flows. In addition, there can be no assurance that our contract counterparties will perform or adhere to existing or future contractual arrangements, including making any required shortfall payments or other payments due under their respective contracts.

The policies and procedures we use to manage our exposure to credit risk, such as credit analysis, credit monitoring and, if necessary, requiring credit support, cannot fully eliminate counterparty credit risks. To the extent our policies and procedures prove to be inadequate, our financial and operational results may be negatively impacted.

Some of our counterparties may be highly leveraged, have limited financial resources and/or have recently experienced a rating agency downgrade and will be subject to their own operating and regulatory risks. Even if our credit review and analysis mechanisms work properly, we may experience financial losses in our dealings with such parties. In addition, volatility in commodity prices could have a negative impact on our counterparties, which, in turn, could have a negative impact on their ability to meet their obligations to us.

Any material nonpayment or nonperformance by any of our counterparties or suppliers could require us to pursue substitute counterparties or suppliers for the affected operations or reduce our operations. There can be no assurance that any such efforts would be successful or would provide similar financial and operational results.

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Significant prolonged weakness in natural gas, NGL and crude oil prices could reduce throughput on our systems and materially adversely affect our revenues and results of operations.

Lower natural gas, NGL and crude oil prices could negatively impact exploration, development and production of natural gas and crude oil, thereby resulting in reduced throughput on our gathering systems. If natural gas, NGL and/or crude oil prices decrease, it could cause sustained reductions in exploration or production activity in our areas of operation and result in a further reduction in throughput on our systems, which could have a material adverse effect on our business, financial condition, results of operations and cash flows. In the latter half of 2022 and the first half of 2023, the Henry Hub Natural Gas Spot Price declined from a monthly average of $8.81 per MMBtu in August 2022 to a monthly average of $2.18 per MMBtu in June 2023, before rising slightly in the second half of 2023 to close the year at $2.58 per MMBtu on December 29, 2023. As of March 28, 2024, Henry Hub 12-month strip pricing closed at $2.78 per MMBtu. Cushing, Oklahoma West Texas Intermediate crude oil spot prices similarly trended down in the latter half of 2022 through early 2023, from a monthly average of $114.84 per barrel in June 2022 to a monthly average of $70.25 per barrel in June 2023, closing the year at $71.89 per barrel on December 29, 2023. As of March 28, 2024, West Texas Intermediate 12-month strip pricing closed at $79.10 per barrel.

Because of the natural decline in production from our customers’ existing wells, our success depends in part on our customers replacing declining production and also on our ability to maintain levels of throughput on our systems. Any decrease in the volumes that we gather and process could materially adversely affect our business and operating results.

The customer volumes that support our business depend on the level of production from natural gas and crude oil wells connected to our systems, the production from which may be less than expected and will naturally decline over time. As a result, our cash flows associated with these wells will also decline over time. To maintain or increase throughput levels on our systems, we must obtain new sources of volume throughput. The primary factors affecting our ability to obtain new sources of volume throughput include (i) the level of successful drilling activity in our areas of operation and (ii) our ability to compete for new volumes on our systems.

We have no control over the level of drilling activity in our areas of operation, the amount of reserves associated with wells connected to our systems or the rate at which production from a well declines. In addition, we have no control over producers or their drilling and production decisions, which are affected by, among other things:

• the availability and cost of capital;

• prevailing and projected hydrocarbon commodity prices;

• demand for crude oil, natural gas and other hydrocarbon products, including NGLs;

• levels of reserves;

• geological considerations;

• environmental or other governmental regulations, including the availability of drilling permits and the regulation of hydraulic fracturing; and

• the availability of drilling rigs and other costs of production and equipment.

Fluctuations in energy prices can also greatly affect the development of new crude oil and natural gas reserves. Drilling and production activities generally decrease as commodity prices decrease. In general terms, the prices of crude oil, natural gas and other hydrocarbon products fluctuate in response to changes in supply and demand, market uncertainty and a variety of additional factors that are beyond our control. These factors include:

• worldwide economic and geopolitical conditions;

• global or national health concerns, including the outbreak of pandemic or contagious disease, such as COVID-19, which may reduce demand for crude oil, natural gas and NGLs because of reduced global or national economic activity;

• weather conditions and seasonal trends;

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• the levels of domestic production and consumer demand;

• the availability of imported liquefied natural gas (“LNG”);

• the ability to export LNG;

• the availability of transportation and storage systems with adequate capacity;

• the volatility and uncertainty of regional pricing differentials and premiums;

• the price and availability of alternative fuels, including alternative fuels that benefit from government subsidies;

• the effect of energy conservation measures;

• the cost and availability of alternative energy sources;

• the nature and extent of governmental regulation and taxation; and

• the anticipated future prices of crude oil, natural gas and other hydrocarbon products, including NGLs.

Because of these factors, even if new crude oil or natural gas reserves are known to exist in areas served by our assets, producers may choose not to develop those reserves. If reductions in drilling activity result in our inability to maintain the current levels of throughput on our systems, those reductions could reduce our revenues and cash flows and materially adversely affect our results of operations.

In addition, it may be more difficult to maintain or increase the current volumes on our gathering systems, as several of the formations in the unconventional resource plays in which we operate generally have higher initial production rates and steeper production decline curves than wells in more conventional basins and may have steeper production decline curves than initially anticipated. Should we determine that the economics of our gathering, treating, transportation and processing assets do not justify the capital expenditures needed to grow or maintain volumes associated therewith, revenues associated with these assets will decline over time. In addition to capital expenditures to support growth, the steeper production decline curves associated with unconventional resource plays may require us to incur higher maintenance capital expenditures over time, which will reduce our cash available for distribution.

Many of our costs are fixed and do not vary with our throughput. These costs will not decline ratably or at all should we experience a reduction in throughput, which could result in a decline in our revenues and cash flows and materially adversely affect our results of operations and financial condition.

If our customers do not increase the volumes they provide to our gathering systems, our results of operations and financial condition may be materially adversely affected.

If we are unsuccessful in attracting new customers and/or new gathering opportunities with existing customers, our results of operations will be impaired. Our customers are not obligated to provide additional volumes to our gathering systems, and they may determine in the future that drilling activities in areas outside of our current areas of operation are strategically more attractive to them. Reductions by our customers in our areas of mutual interest could result in reductions in throughput on our systems and materially adversely impact our results of operations and financial condition.

Certain of our gathering and processing agreements contain provisions that can reduce the cash flow stability that the agreements were designed to achieve.

We designed those gathering and processing agreements that contain MVC provisions to generate stable cash flows for us over the life of the MVC contract term while also minimizing our direct commodity price risk. Under certain of these MVCs, our customers agree to ship a minimum volume on our gathering systems or send a minimum volume to our processing plants or, in some cases, to pay a minimum monetary amount, over certain periods during the term of the MVC. In addition, our gathering and processing agreements may also include an aggregate MVC, which represents the total amount that the customer must flow on our gathering system or send to our processing plants (or an equivalent monetary amount) over the MVC term. If such customer’s actual throughput

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volumes are less than its MVC for the contracted measurement period, it must make a shortfall payment to us at the end of the applicable measurement period. The amount of the shortfall payment is based on the difference between the actual throughput volume shipped or processed for the applicable period and the MVC for the applicable period, multiplied by the applicable fee. To the extent that a customer’s actual throughput volumes are above or below its MVC for the applicable contracted measurement period, certain of our gathering agreements contain provisions that allow the customer to use the excess volumes or the shortfall payment to credit against future excess volumes or future shortfall payments, which could have a material adverse effect on our results of operations, financial condition and cash flows.

We have not obtained independent evaluations of all of the reserves connected to our gathering systems; therefore, in the future, customer volumes on our systems could be less than we anticipate.

We do not routinely obtain or update independent evaluations of the reserves connected to our systems. Moreover, even if we did obtain independent evaluations of all of the reserves connected to our systems, such evaluations may prove to be incorrect. Crude oil and natural gas reserve engineering requires subjective estimates of underground accumulations of crude oil and natural gas and assumptions concerning future crude oil and natural gas prices, future production levels and operating and development costs.

Accordingly, we may not have accurate estimates of total reserves dedicated to our systems or the anticipated life of such reserves. If the total reserves or estimated life of the reserves connected to our gathering systems are less than we anticipate and we are unable to secure additional volumes, it could have a material adverse effect on our business, results of operations and financial condition.

Our industry is highly competitive, and increased competitive pressure could materially adversely affect our business and operating results.

We compete with other midstream companies in our areas of operations, some of which are large companies that have greater financial, managerial and other resources than we do. In addition, some of our competitors may have assets in closer proximity to natural gas and crude oil supplies and may have available idle capacity in existing assets that would not require new capital investments for use. Our competitors may expand or construct gathering systems that would create additional competition for the services we provide to our customers. Because our customers do not have leases that cover the entirety of our areas of mutual interest, non-customer producers that lease acreage within any of our areas of mutual interest may choose to use one of our competitors for their gathering and/or processing service needs.

In addition, our customers may develop their own gathering systems outside of our areas of mutual interest. Our ability to renew or replace existing contracts with our customers at rates sufficient to maintain current revenues and cash flows could be materially adversely affected by the activities of our competitors and our customers. All of these competitive pressures could have a material adverse effect on our business, results of operations and financial condition.

We may not be able to renew or replace expiring contracts at favorable rates or on a long-term basis.

Our gathering, treating, transportation and processing contracts have terms of various durations. As these contracts expire, we may have to negotiate extensions or renewals with existing customers or enter into new contracts with other customers. We may be unable to obtain new contracts on favorable commercial terms, if at all. We also may be unable to maintain the economic structure of a particular contract with an existing customer or the overall mix of our contract portfolio. Moreover, we may be unable to obtain areas of mutual interest from new customers in the future, and we may be unable to renew existing areas of mutual interest with current customers as and when they expire. The extension or replacement of existing contracts depends on a number of factors beyond our control, including:

• the level of existing and new competition to provide gathering and/or processing services in our areas of operation;

• the macroeconomic factors affecting gathering, treating, transporting and processing economics for our current and potential customers;

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• the balance of supply and demand, on a short-term, seasonal and long-term basis, in our markets;

• the extent to which the customers in our areas of operation are willing to contract on a long-term basis; and

• the effects of federal, state or local regulations on the contracting practices of our customers.

To the extent we are unable to renew our existing contracts on terms that are favorable to us or successfully manage our overall contract mix over time, our revenues and cash flows could decline.

If third-party pipelines or other midstream facilities interconnected to our gathering systems become partially or fully unavailable, our revenues and cash flows could be materially adversely affected.

Our gathering systems connect to third-party pipelines and other midstream facilities, such as processing plants, rail terminals and produced water disposal facilities. The continuing operation of such third-party pipelines and other midstream facilities is not within our control. These pipelines and other midstream facilities may become unavailable due to issues including, but not limited to, testing, turnarounds, line repair, reduced operating pressure, lack of operating capacity, regulatory requirements, curtailments of receipt or deliveries due to insufficient capacity or because of damage from other hazards. In addition, we do not have interconnect agreements with all of these pipelines and other facilities and the agreements we do have may be terminated in certain circumstances and/or on short notice. If any of these pipelines or other midstream facilities become unavailable for any reason, or, if these third parties are otherwise unwilling to receive or transport the natural gas, crude oil and produced water that we gather and/or process, our revenues, cash flows and results of operations could be materially adversely affected.

Crude oil and natural gas production and gathering may be adversely affected by weather conditions and terrain, which in turn could negatively impact the operations of our gathering, treating, transportation and processing facilities and our construction of additional facilities.

Extended periods of below freezing weather and unseasonably wet weather conditions, especially in North Dakota, Colorado, Texas and West Virginia, can be severe and can adversely affect crude oil and natural gas operations due to the potential shut-in of producing wells or decreased drilling activities. These types of interruptions could result in a decrease in the volumes supplied to our gathering systems. Further, delays and shutdowns caused by severe weather may have a material negative impact on the continuous operations of our gathering, treating, transporting and processing systems, including interruptions in service. These types of interruptions could negatively impact our ability to meet our contractual obligations to our customers and thereby give rise to certain termination rights and/or the release of dedicated acreage. Any resulting terminations or releases could materially adversely affect our business and results of operations.

We also may be required to incur additional costs and expenses in connection with the design and installation of our facilities due to their locations and surrounding terrain. We may be required to install additional facilities, incur additional capital and operating expenditures, or experience interruptions in or impairments of our operations to the extent that the facilities are not designed or installed correctly. For example, certain of our pipeline facilities are located in locations with significant elevation changes, which may require specially designed facilities and special installation considerations. If such facilities are not designed or installed correctly, do not perform as intended, or fail, we may be required to incur significant expenditures to correct or repair the deficiencies, or may incur significant damages to or loss of facilities, and our operations may be interrupted as a result of deficiencies or failures. In addition, such deficiencies may cause damage to the surrounding environment, including slope failures, stream impacts and other natural resource damages, and we may as a result also be subject to increased operating expenses or environmental penalties and fines.

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Interruptions in operations at any of our facilities may adversely affect our operations and cash flows available for distribution.

Our operations depend upon the infrastructure that we have developed and constructed. Any significant interruption at any of our gathering, treating, transporting or processing facilities, or in our ability to provide gathering, treating, transporting or processing services, could adversely affect our operations and cash flows available for distribution. Operations at our facilities could be partially or completely shut down, temporarily or permanently, as the result of circumstances not within our control, such as:

• unscheduled turnarounds or catastrophic events at our physical plants or pipeline facilities;

• restrictions imposed by governmental authorities or court proceedings;

• labor difficulties that result in a work stoppage or slowdown;

• a disruption in the supply of resources necessary to operate our midstream facilities;

• damage to our facilities resulting from production volumes that do not comply with applicable specifications; and

• inadequate transportation and/or market access to support production volumes, including lack of pipeline, rail terminals, produced water disposal facilities and/or third-party processing capacity.

Any significant interruption at any of our gathering, treating, transporting or processing facilities, or in our ability to provide gathering, treating, transporting or processing services, could adversely affect our operations.

Our business involves many hazards and operational risks, some of which may not be fully covered by insurance. If a significant incident or event occurs for which we are not adequately insured or if we fail to recover all anticipated insurance proceeds for significant incidents or events for which we are insured, our operations and financial results could be materially adversely affected.

Our operations are subject to all of the risks and hazards inherent in the operation of gathering, treating, transporting and processing systems, including:

• damage to pipelines, processing plants, compression assets, related equipment and surrounding properties caused by tornadoes, floods, freezes, fires and other natural disasters and acts of terrorism;

• inadvertent damage from construction, vehicles, farm and utility equipment;

• leaks or losses resulting from the malfunction of equipment or facilities;

• ruptures, fires and explosions; and

• other hazards that could also result in personal injury and loss of life, pollution and suspension of operations.

These risks could result in substantial losses due to personal injury and/or loss of life, severe damage to and destruction of property and equipment and pollution or other environmental damage. The location of certain of our systems in or near populated areas, including residential areas, commercial business centers and industrial sites, could increase the damages resulting from such events.

These events may also result in the curtailment or suspension of our operations. A natural disaster or any event such as those described above affecting the areas in which we and our customers operate could have a material adverse effect on our operations. Accidents or other operating risks could further result in loss of service available to our customers. Such circumstances, including those arising from maintenance and repair activities, could result in service interruptions on portions or all of our gathering systems. Potential customer impacts arising from service interruptions on segments of our gathering systems could include limitations on our ability to satisfy customer requirements, obligations to temporarily waive MVCs during times of constrained capacity, temporary or permanent release of production dedications, and solicitation of existing customers by others for potential new projects that

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would compete directly with our existing services. Such circumstances could materially adversely impact our ability to meet contractual obligations and retain customers, with a resulting negative impact on our business and results of operations.

Although we have a range of insurance programs providing varying levels of protection for public liability, damage to property, loss of income and certain environmental hazards, we may not be insured against all causes of loss, claims or damage that may occur. If a significant incident or event occurs for which we are not fully insured, it could materially adversely affect our operations and financial condition. Furthermore, we may not be able to maintain or obtain insurance of the type and amount we desire at reasonable rates. As a result of industry or market conditions, including any reluctance by insurance companies to insure oil and gas operations for political or other reasons, premiums and deductibles for certain of our insurance policies may substantially increase. In some instances, certain insurance could become unavailable or available only for reduced amounts of coverage. Additionally, with regard to the assets we have acquired, we have limited indemnification rights to recover from the seller of the assets in the event of any potential environmental liabilities.

We may fail to successfully integrate gathering system acquisitions into our existing business in a timely manner, which could have a material adverse effect on our business, results of operations, and financial condition, or fail to realize all of the expected benefits of the acquisitions, which could negatively impact our future results of operations.

Integration of gathering system acquisitions, such as the 2022 DJ Acquisitions (as defined herein), can be a complex, time-consuming and costly process, particularly if the acquired assets significantly increase our size and/or (i) diversify the geographic areas in which we operate or (ii) the service offerings that we provide.

The failure to successfully integrate the acquired assets with our existing business in a timely manner may have a material adverse effect on our business, results of operations and financial condition. If any of the risks described above or in the immediately preceding risk factor or unanticipated liabilities or costs were to materialize with respect to future acquisitions or if the acquired assets were to perform at levels below the forecasts we used to evaluate them, then the anticipated benefits from the acquisition may not be fully realized, if at all, and our future results of operations and financial condition could be negatively impacted.

Our construction of new assets may not result in revenue increases and will be subject to regulatory, environmental, political, legal and economic risks, which could materially adversely affect our results of operations and financial condition.

The construction of new assets, including for example, the Double E Pipeline, which was placed into service in November 2021, involve numerous regulatory, environmental, political, legal and economic uncertainties that are beyond our control.

Such construction projects may also require the expenditure of significant amounts of capital and financing, traditional or otherwise, that may not be available on economically acceptable terms or at all. If we undertake these projects, our revenue may not increase immediately upon the expenditure of funds for a particular project and they may not be completed on schedule, at the budgeted cost, or at all.

Moreover, we could construct facilities to capture anticipated future production growth in a region where such growth does not materialize or only materializes over a period materially longer than expected. To the extent we rely on estimates of future production in our decision to construct additions to our systems, such estimates may prove to be inaccurate due to the numerous uncertainties inherent in estimating quantities of future production. As a result, new facilities may not attract enough throughput to achieve our expected investment return, which could materially adversely affect our results of operations and financial condition.

In addition, the construction of additions or modifications to our existing gathering, treating, transporting and processing assets and the construction of new midstream assets may require us to obtain federal, state and local regulatory environmental or other authorizations. The approval process for gathering, treating, transporting and processing activities has become increasingly challenging, due in part to state and local concerns related to unregulated exploration and production and gathering, treating, transporting and processing activities in new production areas. Such authorization may not be granted or, if granted, such authorization may include burdensome or expensive conditions. In addition, various officials and candidates at the federal, state and local levels have made

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climate-related pledges or proposed banning hydraulic fracturing altogether. As a result, we may be unable to obtain such authorizations and may, therefore, be unable to connect new volumes to our systems or capitalize on other attractive expansion opportunities. A future government shutdown could delay the receipt of any federal regulatory approvals. Additionally, it may become more expensive for us to obtain authorizations or to renew existing authorizations. If the cost of renewing or obtaining new authorizations increases materially, our cash flows could be materially adversely affected.

We do not own all of the land on which our pipelines and facilities are located, which could result in disruptions to our operations.

We do not own all of the land on which our pipelines and facilities have been constructed, and we are, therefore, subject to the possibility of more onerous terms and/or increased costs to retain necessary land use if we do not have valid rights-of-way or if such rights-of-way lapse or terminate or if our pipelines are not properly located within the boundaries of such rights-of-way. We obtain the rights to construct and operate our pipelines on land owned by third parties and governmental agencies either perpetually or for a specific period of time. If we were to be unsuccessful in renegotiating rights-of-way, we might have to relocate our facilities. Our loss of these rights, through our inability to renew right-of-way contracts or otherwise, could have a material adverse effect on our business, results of operations and financial condition.

Our ability to operate our business effectively could be impaired if we fail to attract and retain key personnel, and a shortage of skilled labor in the midstream energy industry could reduce employee productivity and increase costs, which could have a material adverse effect on our business and results of operations.

Our ability to operate our business and implement our strategies depends on our continued ability to attract and retain highly skilled personnel with midstream energy industry experience and competition for these persons in the midstream energy industry is intense. Given our size, we may be at a disadvantage, relative to our larger competitors, in the competition for these personnel. We may not be able to continue to employ our senior executives and key personnel or attract and retain qualified personnel in the future, and our failure to retain or attract our senior executives and key personnel could have a material adverse effect on our ability to effectively operate our business.

Furthermore, as a result of labor shortages we have experienced difficulty in recruiting and hiring skilled labor throughout our organization. The operation of gathering, treating, transporting and processing systems requires skilled laborers in multiple disciplines such as equipment operators, mechanics and engineers, among others. If we continue to experience shortages of skilled labor in the future, our labor and overall productivity or costs could be materially adversely affected. If our labor prices increase or if we experience materially increased health and benefit costs with respect to our employees, our business and results of operations could be materially adversely affected.

A transition from hydrocarbon energy sources to alternative energy sources could lead to changes in demand, technology and public sentiment, which could have material adverse effects on our business and results of operations.

Increased public attention on climate change and corresponding changes in consumer, commercial and industrial preferences and behavior regarding energy use and generation may result in:

• technological advances with respect to the generation, transmission, storage and consumption of energy (including advances in wind, solar and hydrogen power as well as battery technology);

• increased availability of, and increased demand from consumers and industry for, energy sources other than crude oil and natural gas (including wind, solar, nuclear, and geothermal sources as well as electric vehicles); and

• development of, and increased demand from consumers and industry for, lower-emission products and services (including electric vehicles and renewable residential and commercial power supplies) as well as more efficient products and services.

Such developments relating to a transition from oil and gas to alternative energy sources and a lower-carbon economy may reduce the demand for natural gas and crude oil and other products made from hydrocarbons. For example, in November 2023, the international community, including over 150 governments, gathered in Dubai at the

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United Nations Climate Change Conference in the United Arab Emirates (“COP28”) and announced a new climate deal that calls on countries to ratchet up action on climate, and, on December 13, 2023, COP28 issued its first global stocktake, which calls on parties, including the U.S., to contribute to global efforts to transitioning away from fossil fuels, reduce methane emissions, and tripling of renewable energy capacity and doubling energy efficiency improvement by 2030, among other things, to achieve net zero by 2050. Any significant decrease in the demand for natural gas and crude oil resulting from such developments could reduce the volumes of natural gas and crude oil that we gather and process, which could adversely affect our business and operating results.

Furthermore, if any such developments reduce the desirability of participating in the midstream oil and gas industry, then such developments could also reduce the availability to us of necessary third-party services or facilities that we rely on, which could increase our operational costs and have an adverse effect on our business and results of operations.

Such developments and accompanying societal expectations on companies to address climate change, investor and societal expectations regarding voluntary environmental, social and governance (“ESG”) initiatives and disclosures could, among other things, increase costs related to compliance and stakeholder engagement, increase reputational risk and negatively impact our access to and cost of accessing capital. For example, some prominent investors have announced their intention to no longer invest in the oil and gas sector, citing climate change concerns. If other financial institutions and investors refuse to invest in or provide capital to the oil and gas sector in the future because of these reputational risks, that could result in capital being unavailable to us, or only at significantly increased cost. In addition, we have established a corporate strategy intended to meet ESG-related objectives, which currently includes certain ESG targets. However, we cannot guarantee that our strategy will meet our ESG-related objectives. Such initiatives are voluntary, not binding on our business or management and subject to change. We may determine in our discretion that it is not feasible or practical to implement or complete certain of our ESG-related initiatives, or to meet previously set goals and targets based on cost, timing or other considerations. If we do not adapt to or comply with investor or other stakeholder expectations and standards on ESG matters (or meet ESG-related goals and targets that we have set), as they continue to evolve, if we are perceived to have not responded appropriately or quickly enough to growing concern for ESG and sustainability issues, regardless of whether there is a regulatory or legal requirement to do so, or if estimates, assumptions, and/or third-party information we currently believe to be reasonable are subsequently considered erroneous or misinterpreted, we may suffer from reputational damage and our business, financial condition and/or stock price could be materially and adversely affected.

Furthermore, negative public perception regarding the oil and gas industry resulting from, among other things, concerns raised by advocacy groups about climate change, emissions, hydraulic fracturing, seismicity, or oil spills may lead to increased litigation risk and regulatory, legislative and judicial scrutiny, which may, in turn, lead to new state and federal safety and environmental laws, regulations, guidelines and enforcement interpretations. These actions may cause operational delays or restrictions, increased operating costs, additional regulatory burdens and increased risk of litigation. More broadly, the enactment of climate change-related policies and initiatives across the market at the corporate level and/or investor community level may in the future result in increases in our compliance costs and other operating costs and have other adverse effects (e.g., greater potential for governmental investigations or litigation, driving down demand for our products, or stimulating demand for alternative forms of energy that do not rely on combustion of fossil fuels).

Risks Related to Our Finances

Limited access to and/or availability of the commercial bank market or debt and equity capital markets could impair our ability to grow or cause us to be unable to meet future capital requirements.

To expand our asset base, whether through acquisitions or organic growth, we will need to make expansion capital expenditures. We also frequently consider and enter into discussions with third parties regarding potential acquisitions. In addition, the terms of certain of our gathering and processing agreements also require us to spend significant amounts of capital, over a short period of time, to construct and develop additional midstream assets to support our customers’ development projects. Depending on our customers’ future development plans, it is possible that the capital required to construct and develop such assets could exceed our ability to finance those expenditures using our cash reserves or available capacity under the ABL Facility or the Permian Transmission Credit Facilities (each as defined herein).

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We plan to use cash from operations, incur borrowings and/or sell additional shares of capital stock or other securities to fund our future expansion capital expenditures. Our ability to obtain financing or to access the capital markets for future debt or equity offerings may be limited by (i) our financial condition at the time of any such financing or offering, (ii) covenants in our debt agreements, (iii) restrictions imposed by our Series A Preferred Stock, (iv) general economic conditions and contingencies, (v) increasing disfavor among many investors towards investments in fossil fuel companies and (vi) general weakness in the debt and equity capital markets and other uncertainties that are beyond our control, including political uncertainty in the U.S. (including the ongoing debates related to the U.S. federal government budget), volatility and disruption in global capital and credit markets (including those resulting from geopolitical events, such as the Russian invasion of Ukraine or the continued conflict in the Middle East), uncertainty regarding increases or decreases in interest rates resulting from changes in the federal funds rate range targeted by the Federal Reserve, pandemics, epidemics and other outbreaks, such as COVID-19, or other adverse developments that affect financial institutions. In addition, lenders are facing increasing pressure to curtail their lending activities to companies in the oil and natural gas industry. Furthermore, market demand for equity issued by master limited partnerships has been significantly lower in recent years than it has been historically, which may make it more challenging for us to finance our expansion capital expenditures and acquisition capital expenditures with the issuance of additional equity.

We have not made a distribution on our Common Units or Series A Preferred Units since we announced suspension of those distributions on May 3, 2020, and these suspensions of distributions may further reduce demand for our Common Units or Series A Preferred Units. Because our Series A Preferred Units rank senior to our Common Units with respect to distribution rights, any accrued amounts on our Series A Preferred Units or, upon consummation of the Corporate Reorganization, New Summit’s Series A Preferred Stock must first be paid prior to our resumption of distributions to holders of our Common Units or holders of New Summit’s Common Stock, as applicable. As of March 31, 2024, the amount of accrued and unpaid distributions on the Series A Preferred Units totaled $36.3 million. Further, absent a material change to our business, we do not expect to pay distributions on the Common Units or Series A Preferred Units or, upon consummation of the Corporate Reorganization, New Summit’s Common Stock or Series A Preferred Stock in the foreseeable future. Additionally, there are restrictions on our ability to pay distributions under our outstanding indebtedness that restrict our ability to pay cash distributions on any of our equity securities. As such, if we are unable to raise expansion capital, we may lose the opportunity to make acquisitions, pursue new organic development projects, or to gather, treat and process new production volumes from our customers with whom we have agreed to construct and develop midstream assets in the future. Even if we are successful in obtaining external funds for expansion capital expenditures through the capital markets, the terms thereof could limit our ability to pay distributions to our common equityholders.

We have a significant amount of indebtedness. Our leverage and debt service obligations may adversely affect our financial condition, results of operations and business prospects, and may limit our flexibility to obtain financing and to pursue other business opportunities.

As of March 31, 2024, we had $1.2 billion of indebtedness outstanding, and the unused portion of the ABL Facility totaled $383.7 million after giving effect to the issuance of $4.3 million in outstanding but undrawn irrevocable standby letters of credit and $12.0 million of commitment reserves. Our existing and future debt services obligations could have significant consequences, including among other things:

• limiting our ability to obtain additional financing, if necessary, for working capital, capital expenditures, acquisitions or other purposes and/or obtaining such financing on favorable terms;

• reducing our funds available for operations, future business opportunities and cash distributions by that portion of our cash flow required to make interest payments on our debt;

• increasing our vulnerability to competitive pressures or a downturn in our business or the economy generally; and

• limiting our flexibility in responding to changing business and economic conditions.

Our ability to service our debt will depend upon, among other things, our future financial and operating performance, which will be affected by prevailing economic conditions and financial, business and other factors, many of which are beyond our control, such as commodity prices and governmental regulation.

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We may not be able to generate sufficient cash to service all of our indebtedness and may be forced to take other actions to satisfy our obligations under our indebtedness or to refinance, which may not be successful.

Our ability to make scheduled payments on, or to refinance, our indebtedness obligations, including the ABL Facility and the Senior Notes (as defined herein), depends on our financial condition and operating performance, which are subject to prevailing economic and competitive conditions and certain financial, business and other factors beyond our control. We may not be able to maintain a level of cash flows from operating activities sufficient to permit us to pay the principal, premium, if any, and interest on our indebtedness.

If our operating cash flows and capital resources are insufficient to fund our debt service obligations, we may be forced to adopt alternative financing strategies, such as reducing or delaying investments and capital expenditures, selling assets, seeking additional capital or restructuring or refinancing our indebtedness, some or all of which may not be available to us on terms acceptable to us, if at all, or such alternative strategies may yield insufficient funds to make required payments on our indebtedness.

The 2025 Senior Notes will mature on April 15, 2025. The 2026 Unsecured Notes will mature on October 15, 2026. The 2026 Secured Notes will mature on October 15, 2026; provided that, if the outstanding amount of the 2025 Senior Notes (or any refinancing indebtedness in respect thereof that has a final maturity on or prior to the date that is 91 days after the Initial Maturity Date (as defined in the 2026 Secured Notes Indenture (as defined herein))) is greater than or equal to $50.0 million on January 14, 2025, which is 91 days prior to the scheduled maturity date of the 2025 Senior Notes, then the 2026 Secured Notes will mature on January 14, 2025. As of March 31, 2024, $49.8 million of the 2025 Senior Notes, $209.5 million of the 2026 Unsecured Notes and $785.0 million of the 2026 Secured Notes were outstanding. See “Summary — Recent Developments” for additional information regarding our 2026 Secured Notes and 2026 Unsecured Notes.

The ABL Facility will mature on May 1, 2026; provided that if the outstanding amount of the 2025 Senior Notes (or any permitted refinancing indebtedness in respect thereof that has a final maturity, scheduled amortization or any other scheduled repayment, mandatory prepayment, mandatory redemption or sinking fund obligation prior to the date that is 120 days after the Termination Date (as defined in the ABL Agreement)) on such date equals or exceeds $50.0 million, then the ABL Facility will mature on December 13, 2024. As of March 31, 2024, the outstanding balance of the 2025 Senior Notes was $49.8 million.

Our ability to restructure or refinance our indebtedness will depend on the condition of the capital markets, including the market for senior secured or unsecured notes, and our financial condition at the time. Any refinancing of our indebtedness could be at higher interest rates, may require the pledging of collateral and may require us to comply with more onerous covenants than we are currently subject to, which could further restrict our business operations. In addition, any failure to make payments of interest and principal on our outstanding indebtedness on a timely basis would likely result in a reduction of our credit rating, which could harm our ability to incur additional indebtedness on acceptable terms. In the absence of sufficient cash flows and capital resources, we could face substantial liquidity problems and might be required to dispose of material assets or operations to meet our debt service and other obligations.

The indentures governing the Senior Notes and the ABL Facility place certain restrictions on our ability to dispose of assets and our use of the proceeds from such dispositions. We may not be able to consummate those dispositions on terms acceptable to us, if at all, and the proceeds of any such dispositions may not be adequate to meet any debt service obligations then due.

Further, if for any reason we are unable to meet our debt service and principal repayment obligations, or if we fail to comply with the financial covenants in the documents governing our debt, we would be in default under the terms of the agreements governing our debt, which would allow our creditors under those agreements to declare all outstanding indebtedness thereunder to be due and payable (which would in turn trigger cross-acceleration or cross-default rights among our other debt agreements), the lenders under the ABL Facility could terminate their commitments to extend credit, and the lenders could foreclose against our assets securing their borrowings and we could be forced into bankruptcy or liquidation. If the amounts outstanding under our debt agreements were to be accelerated, we cannot assure you that our assets would be sufficient to repay in full the amounts owed to our creditors.

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Restrictions in the Permian Transmission Credit Facilities, the indentures governing the Senior Notes and the ABL Facility could materially adversely affect our business, financial condition, results of operations and ability to make cash distributions.

We are dependent upon the earnings and cash flows generated by our operations to meet our debt service obligations and to make cash distributions. The operating and financial restrictions and covenants in the Permian Transmission Credit Facilities, the indentures governing the Senior Notes, the ABL Facility and any future financing agreements could restrict our ability to finance future operations or capital needs or to expand or pursue our business activities. For example, the ABL Facility, the Permian Transmission Credit Facilities and the indentures governing the Senior Notes, taken together, restrict our ability to, among other things:

• incur or guarantee certain additional debt;

• make certain cash distributions on or redeem or repurchase certain equity securities;

• make payments on certain other indebtedness;

• make certain investments and acquisitions;

• make certain capital expenditures;

• incur certain liens or other encumbrances or permit them to exist;

• enter into certain types of transactions with affiliates;

• enter into sale and lease-back transactions and certain operating leases;

• merge or consolidate with another company or otherwise engage in a change of control transaction; and

• transfer, sell or otherwise dispose of certain assets.

The ABL Facility also contains covenants requiring Summit Midstream Holdings, LLC (“Summit Holdings”) to maintain certain financial ratios and meet certain tests. Summit Holdings’ ability to meet those financial ratios and tests can be affected by events beyond its control, and we cannot guarantee that Summit Holdings will meet those ratios and tests.

The provisions of the Permian Transmission Credit Facilities, the indentures governing the Senior Notes, and the ABL Facility may affect our ability to obtain future financing and pursue attractive business opportunities as well as affect our flexibility in planning for, and reacting to, changes in business conditions. In addition, a failure to comply with the provisions of the Permian Transmission Credit Facilities, the indentures governing the Senior Notes, and the ABL Facility could result in a default or an event of default that could enable our lenders and/or senior noteholders to declare the outstanding principal of that debt, together with accrued and unpaid interest, to be immediately due and payable. If we were unable to repay the accelerated amounts, the lenders under the ABL Facility could proceed against the collateral granted to them to secure such debt. If the payment of the debt is accelerated, our assets may be insufficient to repay such debt in full, and our equityholders could experience a partial or total loss of their investment. The ABL Facility also has cross default provisions that apply to any other indebtedness we may have, and the indentures governing the Senior Notes have cross default provisions that apply to certain other indebtedness. Any of these restrictions in the ABL Facility, the Permian Transmission Credit Facilities and the indentures governing the Senior Notes could materially adversely affect our business, financial condition, cash flows and results of operations.

The interest rate on the 2026 Secured Notes will be increased if we fail to make certain offers to purchase 2026 Secured Notes.

Under the 2026 Secured Notes Indenture, we are required, starting in the first quarter of 2023 with respect to the fiscal year ended December 31, 2022, and continuing annually through the fiscal year ending December 31, 2025, subject to its ability to do so under the ABL Facility, to purchase an amount of 2026 Secured Notes equal to 100% of the Excess Cash Flow (as defined in the 2026 Secured Notes Indenture) minus certain agreed amounts, if any, generated in the prior year at a purchase price equal to 100% of the principal amount plus accrued and unpaid interest. Excess Cash Flow is generally defined as consolidated cash flow minus the sum of capital expenditures and

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cash payments in respect of permitted investments and permitted restricted payments. Generally, if we do not offer to purchase designated annual amounts of its 2026 Secured Notes for the Excess Cash Flow periods ending 2022, 2023 or 2024, the interest rate on the 2026 Secured Notes is subject to certain rate escalations. Because we did not offer to purchase at least $50.0 million in aggregate principal amount of 2026 Secured Notes by April 1, 2023, the interest rate on the 2026 Secured Notes automatically increased by 50 basis points per annum to 9.50% effective April 1, 2024. Further, because we did not offer to purchase at least $100.0 million in aggregate principal amount of 2026 Secured Notes by April 1, 2024, the interest rate on the 2026 Secured Notes automatically increased by an additional 50 basis points per annum. If we have not offered to purchase at least $200.0 million in aggregate principal amount of 2026 Secured Notes by April 1, 2025, the interest rate on the 2026 Secured Notes shall automatically increase by 200 basis points per annum (minus any amount previously increased). An increase in the interest rates associated with our 2026 Secured Notes would adversely affect our results of operations and reduce cash flow available for other purposes, including making other required payments of our debt obligations or capital expenditures. In addition, an additional increase in interest rates on the 2026 Secured Notes could adversely affect our future ability to obtain financing on attractive terms or materially increase the cost of any additional financing.

Inflation could have adverse effects on our results of operation.

Although inflation in the United States had been relatively low for many years, there was a significant increase in inflation beginning in the second half of 2021 through 2023 due to a substantial increase in money supply, a stimulative fiscal policy, a significant rebound in consumer demand as COVID-19 restrictions were relaxed, the Russia-Ukraine war and worldwide supply chain disruptions resulting from the economic contraction caused by COVID-19 and lockdowns followed by a rapid recovery. Inflation rose from 5.4% in June 2021 to 7.0% in December 2021 to 8.2% in September 2022.

While inflation has declined since the second half of 2022, declining to 3.4% in December 2023, further increases in inflation in 2024 could increase our labor and other operating costs and the overall cost of capital projects we undertake. An increase in inflation rates could negatively affect our profitability and cash flows, due to higher wages, higher operating costs, higher financing costs, and/or higher supplier prices. We may be unable to pass along such higher costs to its customers. In addition, inflation may adversely affect customers’ financing costs, cash flows, and profitability, which could adversely impact their operations and our ability to offer credit and collect receivables.

An increase in interest rates will cause our debt service obligations to increase.

Since March 2022, the Federal Reserve has raised its target range for the federal funds rate multiple times to a current target range of 5.25% to 5.50%, and the timing of any potential further increases or decreases remains uncertain. Borrowings under the ABL Facility and the Permian Transmission Credit Facilities bear interest at rates equal to SOFR plus margin. The interest rates are subject to adjustment based on fluctuations in SOFR, as applicable. An increase in the interest rates associated with our floating rate debt would increase our debt service costs and affect our results of operations and cash flow available for payments of our debt obligations. In addition, an increase in interest rates could adversely affect our future ability to obtain financing or materially increase the cost of any additional financing.

A downgrade of our credit rating could impact our liquidity, access to capital and our costs of doing business, and independent third parties determine our credit ratings outside of our control.

Moody’s Investors Service, Inc., Standard & Poor’s Ratings Services or Fitch Ratings, Inc. assign ratings to our senior unsecured credit from time to time. A downgrade of our credit rating could increase our future cost of borrowing and could require us to post collateral with third parties, including our hedging arrangements, which could negatively impact our available liquidity and increase our cost of debt. If a credit rating downgrade and the resultant cash collateral requirement were to occur at a time when we are experiencing significant working capital requirements or otherwise lacking liquidity, our results of operations, financial condition and cash flows could be adversely affected.

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We have in the past and may in the future incur losses due to an impairment in the carrying value of our long-lived assets or equity method investments.

We recorded long-lived asset impairments of $0.5 million in 2023 and $91.6 million in 2022. When evidence exists that we will not be able to recover a long-lived asset’s carrying value through future cash flows, we write down the carrying value of the asset to its estimated fair value. We test long-lived assets for impairment when events or circumstances indicate that the carrying value of a long-lived asset may not be recoverable. With respect to property, plant and equipment and our amortizing intangible assets, the carrying value of a long-lived asset is not recoverable if the carrying value exceeds the sum of the undiscounted cash flows expected to result from the asset’s use and eventual disposal. In this situation, we recognize an impairment loss equal to the amount by which the carrying value exceeds the asset’s fair value. We determine fair value using either a market-based approach, an income-based approach in which we discount the asset’s expected future cash flows to reflect the risk associated with achieving the underlying cash flows, or a mixture of both market-and income-based approaches. We evaluate our equity method investments for impairment whenever events or circumstances indicate that a decline in fair value is other than temporary. Any impairment determinations involve significant assumptions and judgments. If actual results are not consistent with our assumptions and estimates, or our assumptions and estimates change due to new information, we may be exposed to impairment charges. Adverse changes in our business or the overall operating environment, such as lower commodity prices, may affect our estimate of future operating results, which could result in future impairment due to the potential impact on our operations and cash flows.

A portion of our revenues are directly exposed to changes in crude oil, natural gas and NGL prices, and our exposure may increase in the future.

During the year ended December 31, 2023, we derived 39% of our revenues from (i) the sale of physical natural gas and/or NGLs purchased under percentage-of-proceeds or other processing arrangements with certain of our customers in the Rockies and Piceance segments, (ii) the sale of natural gas we retain from certain Barnett customers, (iii) the sale of condensate we retain from our gathering services in the Rockies and Piceance segment and (iv) additional gathering fees that are tied to performance of certain commodity price indexes, which are then added to the fixed gathering rates. Consequently, our existing operations and cash flows have direct exposure to commodity price risk. Although we will seek to limit our commodity price exposure with new customers in the future, our efforts to obtain fee-based contractual terms may not be successful or the local market for our services may not support fee-based gathering and processing agreements. For example, we have percent-of-proceeds contracts with certain natural gas producer customers and we may, in the future, enter into additional percent-of-proceeds contracts with these customers or other customers or enter into keep-whole arrangements, which would increase our exposure to commodity price risk, as the revenues generated from those contracts directly correlate with the fluctuating price of the underlying commodities.

Furthermore, we may acquire or develop additional midstream assets in the future that have a greater exposure to fluctuations in commodity price risk than our current operations. Future exposure to the volatility of natural gas and crude oil prices could have a material adverse effect on our business, results of operations and financial condition. For example, for a small portion of the natural gas gathered on our systems, we purchase natural gas from producers prior to delivering the natural gas to pipelines where we typically resell the natural gas under arrangements including sales at index prices. Generally, the gross margins we realize under these arrangements decrease in periods of low natural gas prices. If we expand the implementation of such natural gas purchase and sale arrangements within our business, such fluctuations could materially affect our business.

Regulatory and Environmental Policy Risks

We settled a matter that was previously under investigation by federal and state regulatory agencies regarding a pipeline rupture and release of produced water by one of our subsidiaries. The resulting compliance requirements of the settlement may impact our results of operations or cash flows.

On August 4, 2021, we settled an incident involving a produced water disposal pipeline owned by our subsidiary Meadowlark Midstream Company, LLC (“Meadowlark Midstream”) that resulted in a discharge of materials into the environment, which was investigated by federal and state agencies. This settlement resulted in

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losses amounting to $36.3 million and will be paid over five (5) to six (6) years, of which we have paid principal amounts of $14.7 million as of March 31, 2024 and requires compliance with certain conditions and terms and conditions, which may impact our results of operations or cash flows.

We may, from time to time, be involved in litigation and claims arising out of our operations in the normal course of business. As a result, we may be required to expend significant funds for legal defense or to settle claims. Any such loss, if incurred, could be material.

Expenditures made by us for the payment of litigation related costs, including legal defense costs and settlement payments, if any, reduce our cash flows available for debt service and distributions. Any such expenditures, if incurred, could be material.

A change in laws and regulations applicable to our assets or services, or the interpretation or implementation of existing laws and regulations may cause our revenues to decline or our operation and maintenance expenses to increase.

Various aspects of our operations are subject to regulation by the various federal, state and local departments and agencies that have jurisdiction over participants in the energy industry. The regulation of our activities and the natural gas and crude oil industries frequently change as they are reviewed by legislators and regulators. For example, the Pipeline and Hazardous Materials Safety Administration (“PHMSA”) has issued new proposed and final rules concerning pipeline safety in recent years. In November 2021, PHMSA issued a final rule that extended pipeline safety requirements to onshore gas gathering pipelines. The rule requires all onshore gas gathering pipeline operators to comply with PHMSA’s incident and annual reporting requirements. It also extends existing pipeline safety requirements to a new category of gas gathering pipelines, “Type C” lines, which generally include high-pressure pipelines that are larger than 8.625 inches in diameter. Safety requirements applicable to Type C lines vary based on pipeline diameter and potential failure consequences. The final rule became effective in May 2022 and operators were required to comply with the applicable safety requirements by November 2022. In addition, in August 2022, PHMSA issued a final rule that established new or additional requirements for natural gas transmission lines related to the management of change process, integrity management, corrosion control standards, and pipeline inspections and repairs. In May 2023, PHMSA published a Notice of Proposed Rulemaking for regulatory amendments to reduce methane emissions from new and existing gas transmission, distribution, and regulated gas gathering pipelines with strengthened leakage survey and patrolling requirements, performance standards for advanced leak detection programs, leak grading and repair criteria with mandatory repair timelines, requirements for mitigation of emissions from blowdowns, pressure relief device design, configuration, and maintenance requirements, clarified requirements for investigating failures, and expanded reporting requirements. To the extent these or other new proposed or final rules create additional requirements for our pipelines, they could have a material adverse effect on our operations, operating and maintenance expenses and revenues. For additional information on the potential risks associated with PHMSA requirements, see “— We may incur greater than anticipated costs and liabilities as a result of pipeline safety requirements.”

In addition, the adoption of proposals for more stringent legislation, regulation or taxation of drilling activity could directly curtail such activity or increase the cost of drilling, resulting in reduced levels of drilling activity and therefore reduced demand for our services. For example, Colorado Senate Bill 19-181, signed into law in April 2019, changed the mandate of the Colorado Energy and Carbon Management Commission (“ECMC,” formerly the Colorado Oil and Gas Conservation Commission) from fostering oil and gas development to regulating oil and gas development in a reasonable manner to protect public health and the environment. The law also allows local governments to impose more restrictive requirements on oil and gas operations than those issued by the state. As part of its implementation of this law, in November 2020 the ECMC adopted new regulations that increase oil and gas setbacks to a minimum of 2,000 feet from schools and childcare facilities, prohibit routine venting and flaring, increase wildlife protections, and alter certain aspects of the permitting process. These regulations and similar efforts in Colorado and elsewhere could restrict oil and gas development in the future. Regulatory agencies establish and, from time to time, change priorities, which may result in additional burdens on us, such as additional reporting requirements and more frequent audits of operations. Our operations and the markets in which we participate are affected by these laws, regulations and interpretations and may be affected by changes to them or their implementation, which may cause us to realize materially lower revenues or incur materially increased operation and maintenance costs or both.

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Increased regulation of hydraulic fracturing could result in reductions or delays in customer production, which could materially adversely impact our revenues.

Hydraulic fracturing is an important and increasingly common practice that is used to stimulate production of natural gas and/or crude oil from dense subsurface rock formations and is primarily regulated by state agencies. However, Congress has in the past considered, and may in the future consider, legislation to regulate hydraulic fracturing by federal agencies. Many states have already adopted laws and/or regulations that require disclosure of the chemicals used in hydraulic fracturing. A number of states — such as Colorado, as discussed above — have adopted, and other states are considering adopting, legal requirements that could impose more stringent permitting, disclosure and well construction requirements on crude oil and/or natural gas drilling activities. For example, during the 2021-2022 election cycle, Colorado representatives proposed a ballot initiative to ban hydraulic fracturing on all non-federal land, but the proposed initiative failed to garner significant support. States also could elect to prohibit hydraulic fracturing altogether, as New York, Maryland, Oregon and Vermont have done. In addition, certain local governments have adopted, and additional local governments may adopt, ordinances within their jurisdictions regulating the time, place and manner of drilling activities in general or hydraulic fracturing activities in particular. These initiatives and similar efforts in Colorado and elsewhere could restrict oil and gas development in the future.

The U.S. Environmental Protection Agency (“EPA”) has also moved forward with various regulatory actions, including announcing final new regulations under the New Source Performance Standard (“NSPS”) to expand and strengthen emissions reduction requirements under NSPS OOOOa for new, modified and reconstructed oil and natural gas sources, and require states to reduce methane emissions from existing sources nationwide. The Bureau of Land Management (“BLM”) has also asserted regulatory authority over aspects of the hydraulic fracturing process and issued a final rule in March 2015 that established more stringent standards for performing hydraulic fracturing on federal and Indian lands, including requirements relating to well construction and integrity, handling of wastewater and chemical disclosure. However, in December 2017, the BLM published a final rule rescinding the 2015 rule. The U.S. District Court for the Northern District of California upheld the December 2017 rescission rule in a March 2020 decision, and the State of California and environmental plaintiffs appealed. The parties remain in settlement discussion.

Further, several federal governmental agencies (including the EPA) have conducted reviews and studies on the environmental aspects of hydraulic fracturing in the past. The results of such reviews or studies could spur initiatives to further regulate hydraulic fracturing.

State and federal regulatory agencies have also focused on a possible connection between the hydraulic fracturing related activities and the increased occurrence of seismic activity. When caused by human activity, such events are called induced seismicity. Some state regulatory agencies, including those in Colorado and Texas, have modified their regulations or guidance to account for induced seismicity. These developments could result in additional regulation and restrictions on the use of injection disposal wells and hydraulic fracturing. Such regulations and restrictions could cause delays and impose additional costs and restrictions on our customers.

Additionally, certain of our customers produce oil and gas on federal lands. On January 20, 2021, the Acting Secretary for the Department of the Interior signed an order effectively suspending new fossil fuel leasing and permitting on federal lands for 60 days. Then on January 27, 2021, President Biden issued an executive order indefinitely suspending new oil and natural gas leases on public lands or in offshore waters pending completion of a comprehensive review and reconsideration of federal oil and gas permitting and leasing practices. Several states filed lawsuits challenging the suspension, and on June 15, 2021, a judge in the U.S. District Court for the Western District of Louisiana issued a nationwide temporary injunction blocking the suspension in July 2021. Although the injunction was subsequently overturned by the Court of Appeals for the Fifth Circuit, on remand the U.S. District Court issued a permanent injunction as requested by the plaintiff states in August 2022. The Department of the Interior has since resumed leasing. In July 2023, U.S. Department of Interior (“DOI”) proposed updates to its onshore oil and gas leasing regulations, which could further restrict oil and gas exploration and production on federal lands. DOI expects to issue a final rule in the spring of 2024. The Biden Administration continues to evaluate federal leasing and could impose additional restrictions in the future.

If new or more stringent federal, state or local legal restrictions relating to drilling activities or to the hydraulic fracturing process are adopted, this could result in a reduction in the supply of natural gas and/or crude oil that our customers produce, and could thereby adversely affect our revenues and results of operations. Compliance with such

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rules could also generally result in additional costs, including increased capital expenditures and operating costs, for our customers, which could ultimately decrease end-user demand for our services and could have a material adverse effect on our business.

We are subject to FERC jurisdiction, federal anti-market manipulation laws and regulations, potentially other federal regulatory requirements and state and local regulation and could be materially affected by changes in such laws and regulations, or in the way they are interpreted and enforced.

We believe that our natural gas pipeline facilities qualify as gathering facilities that are exempt from the jurisdiction of FERC under the Natural Gas Act (“NGA”) and the Natural Gas Policy Act of 1978 (“NGPA”). Interstate movements of crude oil on the Epping Pipeline in North Dakota are subject to FERC jurisdiction under the Interstate Commerce Act (“ICA”), and the rates, terms and conditions of service, and practices on the pipeline are subject to review and challenge before FERC.

Additionally, the Double E Pipeline, which provides interstate natural gas transmission service from southeastern New Mexico to the Waha hub in Texas, is subject to FERC jurisdiction under the NGA with respect to post-construction remediation activities, operations, and rates and terms and conditions of service. Pursuant to the NGA, Double E Pipeline’s existing interstate natural gas transportation rates and terms and conditions of service may be challenged by complaint and are subject to prospective change by FERC. Additionally, rate changes and changes to terms and conditions of service proposed by a regulated natural gas interstate pipeline may be protested and such changes can be delayed and may ultimately be rejected by FERC. FERC may also initiate reviews of an interstate pipeline’s rates. We cannot guarantee that any new or existing tariff rate for service on our FERC-regulated pipelines would not be rejected or modified by the FERC or subjected to refunds. Any successful challenge by a regulator or shipper in any of these matters could have a material adverse effect on our business, financial condition and results of operations.

We have certain long-term fixed priced natural gas and crude oil transportation contracts that cannot be adjusted even if our costs increase. As a result, our costs could exceed our revenues. In 2021, we entered into negotiated rate agreements with an average term of 10 years from the in-service date of the pipeline, which occurred on November 18, 2021 and with total maximum daily transportation quantities (“MDTQs”) that increases from 585,000 Dth/d during the first year of the agreement to 1,000,000 Dth/d in the fourth year, which equates to approximately 74% of its certificated capacity of 1,350,000 Dth/d; these contracts are not subject to adjustment, even if our cost to perform such services exceeds the revenues received from such contracts, and, as a result, our costs could exceed our revenues received under such contracts. It is possible that costs to perform services under our “negotiated or discount rate” contracts will exceed the negotiated or discounted rates. It is also possible with respect to discounted rates that if our filed “recourse rates” should ever be reduced below applicable discounted rates, we would only be allowed by FERC to charge the lower recourse rates, since FERC policy does not allow discount rates to be charged to the extent that they exceed applicable recourse rates. If these events were to occur, it could decrease the cash flow realized by our assets.

Under FERC policy, a regulated service provider and a customer may mutually agree to sign a contract for service at a “negotiated rate,” which is generally fixed between the natural gas pipeline and the shipper for the contract term and does not necessarily vary with changes in the level of cost-based “recourse rates,” provided that the affected customer is willing to agree to such rates and that the FERC has accepted the negotiated rate agreement. These “negotiated or discount rate” contracts are not generally subject to adjustment for increased costs, which could be caused by inflation or other factors relating to the specific facilities being used to perform the services. Any shortfall of revenue, representing the difference between “recourse rates” (if higher) and negotiated or discounted rates, under current FERC policy, may be recoverable from other shippers in certain circumstances. For example, the FERC may recognize this shortfall in the determination of prospective rates in a future rate case. However, if the FERC were to disallow the recovery of such costs from other customers, it could decrease the cash flow realized by our assets.

We are also generally subject to the anti-market manipulation provisions in the NGA, as amended by the Energy Policy Act of 2005, and to FERC’s regulations thereunder, and also must comply with the other applicable provisions of the NGA and NGPA and FERC’s rules, regulations, and orders concerning the Double E Pipeline’s interstate natural gas pipeline business, including those that require us to provide firm and interruptible transportation service on an open access basis that is not unduly discriminatory or preferential. Violations of the

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NGA or NGPA, or the rules, regulations, and orders issued by FERC thereunder could result in the imposition of administrative and criminal remedies, including without limitation, revocation of certain authorities, disgorgement of ill-gotten gains, and civil penalties of up to approximately $1.5 million per day per violation of the NGA or its implementing regulations, subject to future adjustment for inflation. In addition, the Federal Trade Commission (“FTC”) holds statutory authority under the Energy Independence and Security Act of 2007 to prevent market manipulation in oil markets and has adopted broad rules and regulations prohibiting fraud and market manipulation. The FTC is also authorized to seek fines of up to approximately $1.5 million per violation, subject to future adjustment for inflation. The Commodity Futures Trading Commission (“CFTC”) is directed under the Commodity Exchange Act (“CEA”) to prevent price manipulation in the commodity, futures and swaps markets, including the energy markets. Pursuant to the Dodd-Frank Wall Street Reform and Consumer Protection Act of 2010 (the “Dodd-Frank Act”), and other authority, the CFTC has adopted additional anti-market manipulation regulations that prohibit fraud and price manipulation in the commodity, futures and swaps markets. The CFTC also has statutory authority to seek civil penalties of up to the greater of approximately $1.5 million per violation, subject to future adjustment for inflation, or triple the monetary gain to the violator for each violation of the anti-market manipulation provisions of the CEA.

The distinction between federally unregulated natural gas and crude oil pipelines and FERC-regulated natural gas and crude oil pipelines has been the subject of extensive litigation and is determined by FERC on a case-by-case basis. FERC has made no determinations as to the status of our facilities. Consequently, the classification and regulation of some of our pipelines could change based on future determinations by FERC, Congress or the courts. If our natural gas gathering operations or crude oil operations beyond the Epping Pipeline become subject to FERC jurisdiction under the NGA, the NGPA or the ICA, the result may materially adversely affect the rates we are able to charge and the services we currently provide and may include the potential for a termination of our gathering agreements with our customers. In addition, if any of our facilities were found to have provided services or otherwise operated in violation of the NGA, the NGPA or the ICA, this could result in the imposition of civil penalties as well as a requirement to disgorge charges collected for such services in excess of the rate established by FERC.

We are subject to state and local regulation regarding the construction and operation of our gathering, treating, transporting and processing systems, as well as state ratable take statutes and regulations. Regulation of the construction and operation of our facilities may affect our ability to expand our facilities or build new facilities and such regulation may cause us to incur additional operating costs or limit the quantities of natural gas and crude oil we may gather, treat and process. Ratable take statutes and regulations generally require gatherers to take natural gas and crude oil production that may be tendered for gathering without undue discrimination. These requirements restrict our right to decide whose production we gather, treat and process. Many states have adopted complaint-based regulation of gathering, treating, transporting and processing activities, which allows producers and shippers to file complaints with state regulators in an effort to resolve access issues, rate grievances and other matters. Other state and municipal regulations do not directly apply to our business but may nonetheless affect the availability of natural gas and crude oil for gathering, treating, transporting and processing, including state regulation of production rates, maximum daily production allowable from wells, and other activities related to drilling and operating wells. While our facilities currently are subject to limited state and local regulation, there is a risk that state or local laws will be changed or reinterpreted, which may materially affect our operations, operating costs and revenues.

We are subject to stringent environmental laws and regulations that may expose us to significant costs and liabilities.

Our gathering, treating, transporting and processing operations are subject to stringent and complex federal, state and local environmental laws and regulations, including laws and regulations regarding the discharge of materials into the environment or otherwise relating to environmental protection, including, for example, the Clean Air Act (“CAA”), the Comprehensive Environmental Response, Compensation and Liability Act (“CERCLA”), the Clean Water Act (the “CWA”), the Oil Pollution Control Act (the “OPA”), the Resource Conservation and Recovery Act (the “RCRA”), the Endangered Species Act (the “ESA”) and the Toxic Substances Control Act.

These laws and regulations may impose numerous obligations that are applicable to our operations, including the acquisition of permits to conduct regulated activities, the incurrence of capital or operating expenditures to limit or prevent releases of materials from our pipelines and facilities, and the imposition of substantial liabilities and remedial obligations for pollution resulting from our operations or at locations currently or previously owned or operated by us. Numerous governmental authorities, such as the EPA and analogous state agencies, have the power

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to enforce compliance with these laws and regulations and the permits issued under them, oftentimes requiring difficult and costly corrective actions or costly pollution control measures. Failure to comply with these laws, regulations and requisite permits may result in the assessment of significant administrative, civil and criminal penalties, the imposition of remedial obligations and the issuance of injunctions limiting or preventing some or all of our operations. In addition, we may experience a delay in obtaining or be unable to obtain required permits or regulatory authorizations, which may cause us to lose potential and current customers, interrupt our operations and limit our growth and revenue.

There is a risk that we may incur significant environmental costs and liabilities in connection with our operations due to historical industry operations and waste disposal practices, our handling of hydrocarbons and other wastes and potential emissions and discharges related to our operations. Joint and several, strict liability may be incurred, without regard to fault, under certain of these environmental laws and regulations in connection with discharges or releases of hydrocarbon wastes on, under or from our properties and facilities, many of which have been used for midstream activities for a number of years, oftentimes by third parties not under our control. Private parties, including the owners of the properties through which our gathering systems pass, and on which certain of our facilities are located, may also have the right to pursue legal actions to enforce compliance as well as to seek damages for non-compliance with environmental laws and regulations or for personal injury or property damage. For example, an accidental release from one of our pipelines could subject us to substantial liabilities arising from environmental cleanup and restoration costs, claims made by neighboring landowners and other third parties for personal injury and property damage and fines or penalties for related violations of environmental laws or regulations. In addition, changes in environmental laws occur frequently, and any such changes that result in additional permitting obligations or more stringent and costly waste handling, storage, transport, disposal or remediation requirements could have a material adverse effect on our operations or financial position. We may not be able to recover all or any of these costs from insurance.

The Biden Administration is considering revisions to the leasing and permitting programs for oil and gas development on federal lands, which could materially adversely affect our industry and our financial condition and results of operations.

We may incur greater than anticipated costs and liabilities as a result of pipeline safety requirements.

The U.S. Department of Transportation (“DOT”), through PHMSA, has adopted and enforces safety standards and procedures applicable to our pipelines. In addition, many states, including the states in which we operate, have adopted regulations that are identical to or more restrictive than existing DOT regulations for intrastate pipelines. Among the regulations applicable to us, PHMSA requires pipeline operators to develop integrity management programs for certain pipelines located in high consequence areas, which include high population areas such as the Dallas-Fort Worth greater metropolitan area where our DFW Midstream Services LLC (“DFW Midstream”) system is located. While the majority of our pipelines have historically met the DOT definition of gathering lines and were thus exempt from PHMSA’s integrity management requirements, we also operate a limited number of pipelines that are subject to the integrity management requirements. The regulations require operators, including us, to:

• perform ongoing assessments of pipeline integrity;

• identify and characterize applicable threats to pipeline segments that could impact a high consequence area;

• maintain processes for data collection, integration and analysis;

• repair and remediate pipelines as necessary;

• adopt and maintain procedures, standards and training programs for control room operations; and

• implement preventive and mitigating actions.

For additional information on PHMSA regulations relating to pipeline safety, see “— A change in laws and regulations applicable to our assets or services, or the interpretation or implementation of existing laws and regulations may cause our revenues to decline or our operation and maintenance expenses to increase.”

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Climate change legislation, regulatory initiatives and litigation could result in increased operating costs and reduced demand for the services we provide.

In recent years, the U.S. Congress has considered legislation to restrict or regulate emissions of greenhouse gasses (“GHGs”), such as carbon dioxide and methane that may be contributing to global warming and energy legislation and other initiatives are expected to be proposed that may be relevant to GHG emissions issues. For example, the Inflation Reduction Act, signed into law in August 2022, includes a Methane Emissions Reduction Program to incentivize methane emission reductions and impose a fee on GHG emissions from certain oil and gas facilities.

In addition, almost half of the states, either individually or through multi-state regional initiatives, have begun to address GHG emissions, primarily through the planned development of emission inventories or regional GHG cap and trade programs. Most of these cap and trade programs work by requiring either major sources of emissions, such as electric power plants, or major producers of fuels, such as refineries and gas processing plants, to acquire and surrender emission allowances. In general, the number of allowances available for purchase is reduced each year until the overall GHG emission reduction goal is achieved. Depending on the scope of a particular program, we could be required to purchase and surrender allowances for GHG emissions resulting from our operations (e.g., at compressor stations). It is possible that certain components of our operations, such as our gas-fired compressors, could become subject to state-level GHG-related regulation. For example, in June 2022, as part of a Governor-directed statewide initiative to reduce GHG emissions by at least 45% by 2030, the New Mexico Environment Department (“NMED”) finalized new rules that would establish emissions standards for volatile organic compounds (“VOCs”) and nitrogen oxides for oil and gas production and processing sources located in certain areas of the state with high ozone concentrations. We cannot currently determine the effect of these proposed regulations and other regulatory initiatives to implement the Governor’s directive to reduce GHG emissions, that could, if implemented, impact the business, reputation, financial condition or results of our operations in New Mexico or that of our customers upstream of the Double E Pipeline. Similarly, in April 2021, the New Mexico Department of Energy, Minerals, and Natural Resources (“EMNRD”) finalized new rules concerning venting and flaring of natural gas. EMNRD’s final rule could impose new or increased costs and obligations on our customers upstream of the Double E Pipeline.

Independent of Congress, the EPA has adopted regulations under its existing CAA authority. In 2009, the EPA published its findings that emissions of GHGs present an endangerment to public health and the environment because emissions of such gases are contributing to warming of the earth’s atmosphere and other climatic changes. Based on these findings, the EPA adopted regulations that, among other things, establish Prevention of Significant Deterioration (“PSD”) construction and Title V operating permit reviews for certain large stationary sources of GHG emissions.

Further, in December 2015, over 190 countries, including the United States, reached an agreement to reduce global GHG emissions. The agreement entered into force in November 2016 after over 70 countries, including the United States, ratified or otherwise consented to be bound by the agreement (the “Paris Agreement”). In November 2019, the United States submitted formal notification to the United Nations that it intended to withdraw from the Paris Agreement. However, on January 20, 2021, President Biden signed an “Acceptance on Behalf of the United States of America” that, reversed the prior withdrawal, and the United States officially rejoined the Paris Agreement on February 19, 2021. As part of rejoining the Paris Agreement, President Biden announced that the United States would commit to a 50 to 52 percent reduction from 2005 levels of GHG emissions by 2030 and set the goal of reaching net-zero GHG emissions by 2050. In September 2021, the U.S. and the European Union jointly announced the launch of the “Global Methane Pledge,” which aims to cut global methane pollution by at least 30% by 2030 relative to 2020 levels, including “all feasible reductions” in the energy sector. Since its formal launch at the 26th Conference of the Parties, over 150 countries have joined the pledge. In November 2021, the Biden Administration expanded on this commitment and announced “The Long-Term Strategy of the United States: Pathways to Net-Zero Greenhouse Gas Emissions by 2050,” establishing a roadmap to net zero emissions in the United States by 2050 through, among other things, improvements in energy efficiency; decarbonization of energy sources via electricity, hydrogen, and sustainable biofuels; and reductions in non-CO2 GHG emissions, such as methane and nitrous oxide. These initiatives followed a series of executive orders by President Biden designed to address climate change. On December 13, 2023, COP28 issued its first global stocktake, which calls on parties, including the U.S., to contribute to global efforts to transitioning away from fossil fuels, reduce methane emissions, and tripling of renewable energy capacity and doubling energy efficiency improvements by 2030, among other

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things, to achieve net zero by 2050. While the stocktake agreement is not legally binding and has no enforcement mechanism, the U.S. could pass further legislation based on the agreement. Reentry into the Paris Agreement, the related stocktake agreement, new legislation, or President Biden’s executive orders may result in the development of additional regulations or changes to existing regulations, which could have a material adverse effect on our business and that of our customers. In addition, in March 2024, the SEC issued rules regarding the enhancement and standardization of mandatory climate-related disclosures for investors. The rules will require registrants to provide certain climate-related information in their registration statements and annual reports, including governance, risk management, financial impacts and strategy related to material climate-related risks, certain climate-related financial disclosures (subject to de minimis thresholds) and, in some instances, Scopes 1 and 2 GHG emissions. The SEC voluntarily stayed the rules pending completion of judicial review and we cannot predict how the stay may ultimately impact the deadlines for compliance. However, we anticipate that the costs associated with preparation for implementation and compliance may be substantial. In addition, enhanced climate disclosure requirements could accelerate the trend of certain stakeholders and lenders restricting or seeking more stringent conditions with respect to their investments in certain carbon intensive sectors.

Although it is not possible at this time to accurately estimate how potential future laws or regulations addressing GHG emissions would impact our business, either directly or indirectly, any future federal or state laws or implementing regulations that may be adopted to address GHG emissions could require us to incur increased operating costs and could materially adversely affect demand for our services. The potential increase in the costs of our operations resulting from any legislation or regulation to restrict emissions of GHG could include new or increased costs to operate and maintain our facilities, install new emission controls on our facilities, acquire allowances to authorize our GHG emissions, pay any taxes related to our GHG emissions, adhere to alternative energy requirements and administer and manage a GHG emissions program. While we may be able to include some or all of such increased costs in the rates we charge, such recovery of costs is uncertain. Moreover, incentives to conserve energy or use alternative energy sources could reduce demand for our services. We cannot predict with any certainty at this time how these possibilities may affect our operations. Finally, most scientists have concluded that increasing concentrations of GHGs in the Earth’s atmosphere may produce climate changes that have significant physical effects, such as increased frequency and severity of storms, droughts and floods and other climatic events. We cannot predict with any certainty at this time how these possibilities may affect our operations.

Statutory and regulatory requirements for swap transactions could have an adverse impact on our ability to hedge risks associated with our business and increase the working capital requirements to conduct these activities.

In the Dodd-Frank Act, Congress adopted comprehensive financial reform legislation that establishes federal oversight over and regulation of the over-the-counter derivatives market and entities, such as us, that participate in that market. Under this legislation, the CFTC and the SEC and other regulatory authorities have promulgated rules and regulations, including rules and regulations relating to the regulation of certain swaps market participants, such as swap dealers, the clearing of certain swaps through central counterparties, the execution of certain swaps on designated contract markets or swap execution facilities, mandatory margin requirements for uncleared swaps, and the reporting and recordkeeping of swaps. In light of the continuing adjustment of the regulations, we cannot predict the ultimate effect of the rules and regulations on our business. Any new regulations or modifications to existing regulations could increase the cost of derivative contracts, limit the availability of derivatives to protect against risks that we encounter, reduce our ability to monetize or restructure our existing derivative contracts, or increase our exposure to less creditworthy counterparties.

In October 2020, the CFTC adopted rules that place limits on positions in certain core futures and equivalent swaps contracts for or linked to certain physical commodities, subject to exceptions for certain bona fide hedging transactions. We do not expect these regulations to materially impede our hedging activity at this time, but a companion rule on aggregation among entities under common ownership or control may have an impact on our ability to hedge our exposure to certain enumerated commodities.

The CFTC has implemented final rules regarding mandatory clearing of certain classes of interest rate swaps and certain classes of index credit default swaps. Mandatory trading on designated contract markets or swap execution facilities of certain interest rate swaps and index credit default swaps also began in 2014. At this time, the CFTC has not proposed any rules designating other classes of swaps, including physical commodity swaps, for mandatory clearing. The CFTC and prudential banking regulators also adopted mandatory margin requirements on uncleared swaps between swap dealers and certain other counterparties. Although we may qualify for a commercial

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end-user exception from the mandatory clearing, trade execution and certain uncleared swaps margin requirements, mandatory clearing and trade execution requirements and uncleared swaps margin requirements applicable to other market participants, such as swap dealers, may affect the cost and availability of the swaps that we use for hedging.

Under the Dodd-Frank Act, the CFTC is also directed generally to prevent price manipulation and fraud in the following two markets: (i) physical commodities traded in interstate commerce, including physical energy and other commodities, and (ii) financial instruments, such as futures, options and swaps. The CFTC has adopted additional anti-market manipulation, anti-fraud and disruptive trading practices regulations that prohibit, among other things, fraud and price manipulation in the physical commodities, futures, options and swaps markets. Should we violate these laws and regulations, we could be subject to CFTC enforcement action, material penalties and sanctions.

We currently enter into forward contracts with third parties to buy power and sell natural gas in an attempt to mitigate our exposure to fluctuations in the price of natural gas with respect to those volumes. The CFTC has finalized an interpretation clarifying whether and when certain forwards with volumetric optionality are to be regulated as forwards or qualify as options on commodities and therefore swaps. The application of this interpretation to any particular situation may impact our ability to enter into certain forwards or may impose additional requirements with respect to certain transactions.

In addition to the Dodd-Frank Act, regulators within the European Union and other foreign regulators have adopted and implemented local reforms generally comparable with the reforms under the Dodd-Frank Act. Enforcement of these regulatory provisions may reduce our ability to hedge our market risks with non-U.S. counterparties or may make any transactions involving cross-border swaps more expensive and burdensome. Additionally, the lingering absence of regulatory equivalency across jurisdictions may increase compliance costs and make it more costly to satisfy regulatory obligations.

We may face opposition to the development, permitting, construction or operation of our pipelines and facilities from various groups.

We may face opposition to the development, permitting, construction or operation of our pipelines and facilities from environmental groups, landowners, local groups and other advocates. Such opposition could take many forms, including organized protests, attempts to block or sabotage our operations, intervention in regulatory or administrative proceedings involving our assets, or lawsuits or other actions designed to prevent, disrupt or delay the development or operation of our assets and business. For example, repairing our pipelines often involves securing consent from individual landowners to access their property; one or more landowners may resist our efforts to make needed repairs, which could lead to an interruption in the operation of the affected pipeline or other facility for a period of time that is significantly longer than would have otherwise been the case. In addition, acts of sabotage or eco-terrorism could cause significant damage or injury to people, property or the environment or lead to extended interruptions of our operations. Any such event that interrupts the revenues generated by our operations, or which causes us to make significant expenditures not covered by insurance, could have a material adverse effect on our business, financial condition and results of operations. Moreover, governmental authorities exercise considerable discretion in the timing and scope of permit issuance and the public may engage in the permitting process, including through intervention in the courts. Negative public perception could cause the permits we require to conduct our operations to be withheld, delayed or burdened by requirements that restrict our ability to profitably conduct our business.

For example, in an April 15, 2020 ruling, amended May 11, 2020, the U.S. District Court for the District of Montana issued an order invalidating the U.S. Army Corps of Engineers (“Corps”) 2017 reissuance of Nationwide Permit 12 (“NWP 12”), the general permit governing discharges of dredged or fill material associated with pipeline and other utility line construction projects, to the extent it was used to authorize construction of new oil and gas pipelines. Environmental groups had alleged that the Corps failed to consult with federal wildlife agencies as required by the ESA. However, in January 2021, the EPA and Corps reissued NWP 12 as a general permit specific to oil and gas pipelines, moving other utility line activities into separate general permits. The U.S. Court of Appeals for the Ninth Circuit subsequently held that the Corps’ January 2021 reissuance rendered the prior challenge moot. In May 2021, environmental groups once again filed suit in the U.S. District Court for the District of Montana, seeking vacatur of the reissued NWP 12. Environmental groups allege that the reissuance of NWP 12 violated the ESA, National Environmental Policy Act, and Clean Water Act, among other things. In September 2022, the U.S. District Court for Montana dismissed the ESA consultation challenges as moot and dismissed the remainder of the lawsuit

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without prejudice. The Corps has announced that it will be reviewing all the nationwide permits for consistency with Administration policies, which could result in additional limitations on the use of nationwide permits. Limitations on the use of NWP 12 may make it more difficult to permit our projects, require consideration of alternative construction or siting, which may impose additional costs and delays, and could cause us to lose potential and current customers and limit our growth and revenue.

In addition, on July 6, 2020, the U.S. District Court for the District of Columbia issued an order vacating a Corps Mineral Leasing Act easement for the Dakota Access Pipeline in a lawsuit filed by the Standing Rock Sioux Tribe and other Native American tribes. The court’s decision requires the pipeline to shut down operations by August 5, 2020 but was stayed by the U.S. Court of Appeals for the District of Columbia Circuit. On January 26, 2021, the U.S. Court of Appeals for the District of Columbia Circuit issued a decision affirming the district court’s holding that the easement should be vacated but reversing the requirement to shut down the pipeline. The Court of Appeals left it to the Corps to determine how to proceed after the loss of the easement, and while the Corps declined to shut down the pipeline, it did not formally approve the pipeline’s ongoing operation without an easement. Dakota Access filed for rehearing en banc on April 12, 2021, which the Court of Appeals denied. On September 20, 2021, Dakota Access filed a petition with the U.S. Supreme Court to hear the case. Oppositions were filed by the Solicitor General and plaintiffs, and Dakota Access has filed its reply.

The Dakota Access Pipeline continues to operate pending the Corps’ ongoing development of a court-ordered environmental impact statement for the project. On June 22, 2021, the District Court terminated the consolidated lawsuits and dismissed all remaining outstanding counts without prejudice. On January 20, 2022, the Standing Rock Sioux Tribe withdrew as a cooperating agency on the draft Environmental Impact Statement (“EIS”), prompting the Corps to temporarily pause on the draft EIS. The Corps published the draft EIS on September 8, 2023 and tribal and public meetings were held in November and December of 2023. If the Dakota Access Pipeline is forced to shut down, this could have a material adverse effect on our business, financial condition and results of operations associated with the Polar and Divide system, which interconnects with the Dakota Access Pipeline.

Recently, activists concerned about the potential effects of climate change have directed their attention towards sources of funding for fossil-fuel energy companies, which has resulted in an increasing number of financial institutions, funds, individual investors and other sources of capital restricting or eliminating their investment in fossil fuel-related activities. In addition, financial institutions have begun to screen companies such as ours for sustainability performance, including practices related to GHGs and climate change, before providing loans or investing in our equity securities. There is also a risk that financial institutions may adopt policies that have the effect of reducing the funding provided to the fossil fuel sector, such as the adoption of net zero financed emissions targets. Such policies may be hastened by actions under the Biden Administration, including the implementation by the Federal Reserve of any recommendations made by the Network for Greening the Financial System, a consortium of financial regulators focused on addressing climate-related risks in the financial sector. Ultimately, this could make it more difficult to secure funding for exploration and production activities or energy infrastructure related projects or adversely impact our cost of capital, and consequently could both indirectly affect demand for our services and directly affect our ability to fund construction or other capital projects. Any efforts to improve our sustainability practices in response to these pressures may increase our costs, and we may be forced to implement technologies that are not economically viable in order to improve our sustainability performance and to meet the specific requirements to maintain access to capital or perform services for certain customers.

Our business is subject to complex and evolving U.S. and international laws and regulations regarding privacy and data protection (“data protection laws”). Many of these data protection laws are subject to change and uncertain interpretation, and could result in claims, increased cost of operations or otherwise harm our business.

Along with our own data and information that we collect and retain in the normal course of our business, we and our business partners collect and retain significant volumes of certain types of data, some of which are subject to data protection laws. The collection, use, and transfer of this data, both domestically and internationally, is becoming increasingly complex. The regulatory environment surrounding the collection, use, transfer and protection of such data is constantly evolving and can be subject to significant change. New data protection laws at the federal, state, international, national, provincial and local levels, including recent Colorado, Connecticut, Virginia and Utah legislation, the European Union General Data Protection Regulation (“GDPR”) and the California Consumer Privacy Act, as amended by the California Privacy Rights Act (“CCPA”), pose increasingly complex compliance challenges and potentially elevate our costs.

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Complying with these jurisdictional requirements could increase the costs and complexity of compliance, and violations of applicable data protection laws can result in significant penalties. For example, the GDPR applies to activities regarding personal data that may be conducted by us, directly or indirectly through business partners. Failure to comply could result in significant penalties of up to a maximum of 4% of our global turnover that may materially adversely affect our business, reputation, results of operations, and cash flows. Similarly, the CCPA, which came into effect on January 1, 2020, imposes specific obligations on businesses that collect personal data from California residents and provides California residents specific rights in relation to their personal data that we or our business partners collect and use. As interpretation and enforcement of the CCPA evolves, it creates a range of new compliance obligations, which could cause us to change our business practices, and carries the possibility for significant financial penalties for noncompliance that may materially adversely affect our business, reputation, results of operations, and cash flows.

As noted above, we are also subject to the possibility of information security breaches, which themselves may result in a violation of these data protection laws. Additionally, if we acquire a company that has violated or is not in compliance with applicable data protection laws, we may incur significant liabilities and penalties as a result.

Risks Related to Terrorism and Cyberterrorism

Terrorist attacks and threats, escalation of military activity in response to these attacks, or acts of war could have a material adverse effect on our business, financial condition or results of operations.

Terrorist attacks and threats, escalation of military activity, or acts of war may have significant effects on general economic conditions, fluctuations in consumer confidence and spending and market liquidity, each of which could materially and adversely affect our business. Future terrorist attacks, rumors or threats of war, actual conflicts involving the United States or its allies, or military or trade disruptions may significantly affect our operations and those of our customers. Strategic targets, such as energy-related assets, may be at greater risk of future attacks than other targets in the United States. Disruption or significant increases in energy prices could result in government-imposed price controls. It is possible that any of these occurrences, or a combination of them, could have a material adverse effect on our business, financial condition and results of operations. Our insurance may not protect us against such occurrences.

Our operations depend on the use of information technology (“IT”) and operational technology (“OT”) systems that could be the target of a cyberattack.

The oil and gas industry has become increasingly dependent on digital technologies to conduct day-to-day operations, including certain midstream activities. For example, software programs are used to manage gathering and transportation systems and for compliance reporting. The use of remote communication devices has increased rapidly. Industrial control systems now control large scale processes that can include multiple sites and long distances, such as oil and gas pipelines.

Our operations depend on the use of sophisticated IT and OT systems. These systems, as well as those of our customers, business partners and counterparties, may become the target of cyber-attacks or information security breaches. Additionally, increased remote access to information systems by employees and contractors can increase exposure to potential cybersecurity incidents.

Any such cyber-attacks or information security breaches could have a material adverse effect on our revenues and increase our operating and capital costs and could reduce the amount of cash otherwise available for distribution. A cyber-incident involving our IT or OT systems, or that of our customers, business partners or counterparties, could disrupt our business plans and negatively impact our operations in the following ways, among others:

• a cyber-attack on a vendor or service provider could result in supply chain disruptions, which could delay or halt development of additional infrastructure, effectively delaying the start of cash flows from the project;

• a cyber-attack on downstream pipelines could prevent us from delivering product at the tailgate of our facilities, resulting in a loss of revenues;

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• a cyber-attack on a communications network or power grid could cause operational disruption, resulting in loss of revenues;

• a deliberate corruption of our financial or operational data could result in events of non-compliance, which could lead to regulatory fines or penalties; and

• business interruptions could result in expensive remediation efforts, distraction of management, damage to our reputation or a negative impact on the price of our Common Stock or Series A Preferred Stock.

Cyber-incidents and related business interruptions could result in expensive remediation efforts, distraction of management, damage to our reputation or a negative impact on the price of our Common Stock or Series A Preferred Stock. In addition, certain cyberattacks and related incidents, such as reconnaissance or surveillance by threat actors, may remain undetected for an extended period notwithstanding our monitoring and detection efforts. As a result, we may be required to incur additional costs to modify or enhance our IT or OT systems to prevent or remediate any such attacks. Finally, laws and regulations governing cybersecurity pose increasingly complex compliance challenges, and failure to comply with these laws could result in penalties and legal liability.

Risks Related to the Common Stock and Series A Preferred Stock

The price of the Common Stock or Series A Preferred Stock may experience volatility.

Following the consummation of the Corporate Reorganization, the price of the Common Stock or the Series A Preferred Stock may be volatile. In addition to the risk factors described above, some of the factors that could affect the price of the Common Stock are quarterly increases or decreases in revenue or earnings, changes in revenue or earnings estimates by the investment community, sales of the Common Stock by significant stockholders, a turnover of the investor base as a result of the Corporate Reorganization, short-selling of the Common Stock or Series A Preferred Stock by investors, issuance of a significant number of shares for equity-based compensation or to raise additional capital to fund New Summit’s operations, changes in market valuations of similar companies and speculation in the press or investment community about New Summit’s financial condition or results of operations, as well as any doubt about its ability to continue as a going concern. General market conditions and U.S. or international economic factors and political events unrelated to the performance of New Summit may also affect its stock price. For these reasons, investors should not rely on recent trends in the price of the Common Units or Series A Preferred Units to predict the future price of the Common Stock or Series A Preferred Stock or New Summit’s future financial results.

The Proposed Governing Documents that will be in effect upon consummation of the Corporate Reorganization contain provisions that may make it more difficult for a third party to acquire control of it, even if a change in control would result in the purchase of your shares of Common Stock or Series A Preferred Stock at a premium to the market price or would otherwise be beneficial to you.

There are provisions in the Proposed Governing Documents that will be in effect upon consummation of the Corporate Reorganization that may make it more difficult for a third party to acquire control of New Summit, even if a change in control would result in the purchase of your shares of Common Stock or Series A Preferred Stock at a premium to the market price or would otherwise be beneficial to you. For example, the New Summit Charter authorizes the New Summit Board to issue preferred stock, $0.01 par value per share (“Preferred Stock”), and common stock, $0.01 par value per share (“Blank Check Common Stock”), without stockholder approval. If the New Summit Board elects to issue Preferred Stock or Blank Check Common Stock, it could be more difficult for a third party to acquire New Summit.

In addition, provisions of the Proposed Governing Documents that will be in effect upon consummation of the Corporate Reorganization, including a classified board of directors and limitations on stockholder actions by written consent and on stockholder proposals and director nominations at meetings of stockholders, could make it more difficult for a third party to acquire control of New Summit. Certain provisions of the DGCL may also discourage takeover attempts that have not been approved by the New Summit Board.

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New Summit does not expect to pay dividends on its Common Stock for the foreseeable future.

New Summit does not expect to pay dividends for the foreseeable future. In addition, the ABL Facility may limit New Summit’s subsidiaries subject thereto from distributing cash to New Summit, without the prior consent of the lenders under the ABL Facility, thereby limiting New Summit’s ability to pay dividends to equity holders, other than dividends payable solely in additional equity interests in New Summit. Further, upon the consummation of the Corporate Reorganization, the Series A Preferred Units will be converted into the right to receive shares of Series A Preferred Stock, and any rights to accumulated and unpaid distributions on such Series A Preferred Units will be discharged and the liquidation preference of such Series A Preferred Stock will be initially equal to $1,000 and the Certificate of Designation will deem all accumulated and unpaid distributions on the Series A Preferred Units to be Series A Unpaid Cash Dividends (as defined in the Certificate of Designation) per share of Series A Preferred Stock. Accordingly, neither New Summit nor the Partnership will make any distributions at the Effective Time on account of any accrued but unpaid distributions on the Series A Preferred Units that have accrued through the date of the Corporate Reorganization.

The value of the shares you receive in connection with the Corporate Reorganization may be diluted by future equity issuances, and shares eligible for future sale may have adverse effects on New Summit’s share price.

We cannot predict the effect of future sales of shares or the availability of shares for future sales, on the market price of or the liquidity of the market for the shares. Sales of substantial amounts of shares, or the perception that such sales could occur, could adversely affect the prevailing market price of the shares. Such sales, or the possibility of such sales, could also make it difficult for us to sell equity securities in the future at a time and at a price that we deem appropriate.

New Summit’s authorized capital stock will consist of 42,000,000 shares of Common Stock, 500,000 shares of Preferred Stock and 30,000,000 shares of Blank Check Common Stock, a significant portion of which will be unissued immediately following the Corporate Reorganization. New Summit may need to raise a significant amount of capital to fund its operations and pay down outstanding indebtedness, including borrowings on the ABL Facility and the Permian Transmission Credit Facilities and the Senior Notes, and may raise such capital through the issuance of newly issued Common Stock, Preferred Stock or Blank Check Common Stock. Such issuance and sale of equity could be dilutive to the interests of existing stockholders.

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CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING STATEMENTS

This proxy statement/prospectus contains forward-looking statements that are subject to a number of risks and uncertainties, many of which are beyond the control of the Partnership and New Summit, which may include statements about:

• the occurrence of any event, change or other circumstances that could give rise to the termination of the Merger Agreement;

• the risk that the failure to consummate the Corporate Reorganization will disrupt ongoing or future strategic alternatives, including a Potential Transaction;

• the outcome of any legal proceedings that may be instituted against the Partnership or New Summit and others relating to the Merger Agreement;

• the effect of the announcement of the Corporate Reorganization on the Partnership’s customer relationships, operating results and business generally;

• the risks that the proposed Corporate Reorganization disrupts current plans and operations;

• the amount of the costs, fees, expenses and charges related to the Corporate Reorganization;

• the failure to obtain the unitholder approval and to satisfy the other conditions to the consummation of the Corporate Reorganization;

• the failure to realize a lower long-term cost of capital and other anticipated benefits of the proposed Corporate Reorganization;

• the Partnership and New Summit’s ability to access the debt and equity markets, which will depend on general market conditions and the credit ratings for debt obligations;

• fluctuations in natural gas, NGLs and crude oil prices, including as a result of political or economic measures taken by various countries or the Organization of the Petroleum Exporting Countries (“OPEC”);

• the extent and success of the Partnership’s and New Summit’s customers’ drilling and completion efforts, as well as the quantity of natural gas, crude oil, freshwater deliveries, and produced water volumes produced within proximity of the Partnership’s and New Summit’s assets;

• failure or delays by the Partnership’s and New Summit’s customers in achieving expected production in their natural gas, crude oil and produced water projects;

• competitive conditions in the Partnership’s and New Summit’s industry and their impact on the Partnership’s and New Summit’s ability to connect hydrocarbon supplies to the Partnership’s and New Summit’s gathering and processing assets or systems;

• actions or inactions taken or nonperformance by third parties, including suppliers, contractors, operators, processors, transporters and customers, including the inability or failure of the Partnership’s and New Summit’s shipper customers to meet their financial obligations under the Partnership’s and New Summit’s gathering agreements and the Partnership’s and New Summit’s ability to enforce the terms and conditions of certain of the Partnership’s and New Summit’s gathering agreements in the event of a bankruptcy of one or more of the Partnership’s and New Summit’s customers;

• the Partnership’s and New Summit’s ability to divest of certain of the Partnership’s and New Summit’s assets to third parties on attractive terms, which is subject to a number of factors, including prevailing conditions and outlook in the natural gas, NGL and crude oil industries and markets;

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• the ability to attract and retain key management personnel;

• commercial bank and capital market conditions and the potential impact of changes or disruptions in the credit and/or capital markets;

• changes in the availability and cost of capital and the results of the Partnership’s and New Summit’s financing efforts, including availability of funds in the credit and/or capital markets;

• restrictions placed on the Partnership and New Summit by the agreements governing the Partnership’s and New Summit’s debt and preferred equity instruments;

• the availability, terms and cost of downstream transportation and processing services;

• natural disasters, accidents, weather-related delays, casualty losses and other matters beyond the Partnership’s and New Summit’s control;

• the current and potential future impact of the COVID-19 pandemic or other pandemics on the Partnership’s and New Summit’s business, results of operations, financial position or cash flows;

• operational risks and hazards inherent in the gathering, compression, treating and/or processing of natural gas, crude oil and produced water;

• the Partnership’s and New Summit’s ability to comply with the terms of the agreements comprising the Global Settlement (as defined herein);

• weather conditions and terrain in certain areas in which the Partnership and New Summit operate;

• physical and financial risks associated with climate change;

• any other issues that can result in deficiencies in the design, installation or operation of the Partnership’s and New Summit’s gathering, compression, treating, processing and freshwater facilities;

• timely receipt of necessary government approvals and permits, the Partnership’s and New Summit’s ability to control the costs of construction, including costs of materials, labor and rights-of-way and other factors that may impact the Partnership’s and New Summit’s ability to complete projects within budget and on schedule;

• the Partnership’s and New Summit’s ability to finance the Partnership’s and New Summit’s obligations related to capital expenditures, including through opportunistic asset divestitures or joint ventures and the impact any such divestitures or joint ventures could have on the Partnership’s and New Summit’s results;

• the effects of existing and future laws and governmental regulations, including environmental, safety and climate change requirements and federal, state and local restrictions or requirements applicable to oil and/or gas drilling, production or transportation;

• the effects of litigation;

• interest rates;

• changes in general economic conditions; and

• other factors and uncertainties discussed in this proxy statement/prospectus and the Partnership’s filings with the SEC, including the Partnership’s Annual Report on Form 10-K for the year ended December 31, 2023 and the Partnership’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2024.

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All of these types of statements, other than statements of historical fact included in this document, are forward-looking statements. In some cases, you can identify forward-looking statements by terminology such as “may,” “could,” “should,” “expect,” “plan,” “project,” “intend,” “anticipate,” “believe,” “estimate,” “predict,” “potential,” “pursue,” “target,” “continue,” the negative of such terms or other comparable terminology.

The forward-looking statements contained in this document are largely based on the Partnership’s expectations, which reflect estimates and assumptions made by the Partnership’s management. These estimates and assumptions reflect the Partnership’s best judgment based on currently known market conditions and other factors. Although we believe such estimates and assumptions to be reasonable, they are inherently uncertain and involve a number of risks and uncertainties that are beyond the Partnership’s control. In addition, management’s assumptions about future events may prove to be inaccurate. All readers are cautioned that the forward-looking statements contained in this document are not guarantees of future performance, and the Partnership’s expectations may not be realized or the forward-looking events and circumstances may not occur. Actual results may differ materially from those anticipated or implied in the forward-looking statements due to factors described in “Risk Factors.” The forward-looking statements in this document speak only as of the date of this document; we disclaim any obligation to update these statements unless required by securities law, and we caution you not to unduly rely on them.

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INFORMATION ABOUT THE PARTIES

Summit Midstream Corporation

Summit Midstream Partners, LP

The Partnership provides natural gas, crude oil and produced water gathering, processing and transportation services pursuant to primarily long-term, fee-based agreements with customers and counterparties in four unconventional resource basins: (i) the Williston Basin, which includes the Bakken and Three Forks shale formations in North Dakota; (ii) the Denver-Julesburg Basin, which includes the Niobrara and Codell shale formations in Colorado and Wyoming; (iii) the Fort Worth Basin, which includes the Barnett Shale formation in Texas; and (iv) the Piceance Basin, which includes the Mesaverde formation as well as the Mancos and Niobrara shale formations in Colorado. The Partnership has an equity method investment in Double E Pipeline, LLC, which provides interstate natural gas transportation service from multiple receipt points in the Delaware Basin to various delivery points in and around the Waha Hub in Texas.

The Partnership’s principal executive offices are located at 910 Louisiana Street, Suite 4200, Houston, Texas 77002, and its telephone number is (832) 413-4770.

Summit Midstream GP, LLC

Summit SMC NewCo, LLC

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THE SPECIAL MEETING

Time, Place and Date

The Special Meeting will be held on July 18, 2024 at 2:00 p.m., Central time. The Special Meeting will be held virtually via live webcast at https://web.lumiconnect.com/217371229 (password: summit2024). You will not be able to attend the Special Meeting in person.

Proposal 1
Approval of the Merger Proposal

As discussed elsewhere in this proxy statement/prospectus, the holders of Common Units are being asked at the Special Meeting to approve the Merger Agreement, pursuant to which Merger Sub will merge with and into the Partnership, with the Partnership continuing as the surviving entity and a wholly-owned subsidiary of New Summit. Unitholders should carefully read this proxy statement/prospectus, including the Annexes, in its entirety for more detailed information concerning the Merger Agreement and the Corporate Reorganization. A vote to approve the Merger Agreement is effectively a vote in favor of the Corporate Reorganization which will result in a conversion from a master limited partnership to a C corporation. In particular, unitholders are directed to the Merger Agreement, a copy of which is attached as Annex A to this proxy statement/prospectus.

The GP Board unanimously recommends that the holders of Common Units vote FOR approval of the Merger Proposal.

Proposal 2
Approval of the Advisory Governing Documents Proposals

As required by SEC guidance to give unitholders the opportunity to present their separate views on important corporate governance provisions, we are requesting that the holders of Common Units vote upon, on an advisory, non-binding basis, the Advisory Governing Documents Proposals, which are separately being presented in accordance with SEC guidance and which will be voted upon on an advisory, non-binding basis. This separate vote is not otherwise required by Delaware law separate and apart from the approval of the Merger Proposal. The unitholder vote regarding each of the Advisory Governing Documents Proposals is an advisory vote and is not binding on the Partnership, the General Partner and New Summit (separate and apart from the approval of the Merger Proposal). Furthermore, the Merger is not conditioned on the separate approval of the Advisory Governing Documents Proposals (separate and apart from approval of the Merger Proposal), but the Advisory Governing Documents Proposals are conditioned upon the approval of the Merger Proposal. Accordingly, regardless of the outcome of the advisory, non-binding vote on the Advisory Governing Documents Proposals, the Partnership intends that the Proposed Governing Documents will take effect immediately prior to the Effective Time (assuming approval of the Merger Proposal).

The following sub-proposals are being presented separately for approval, on an advisory, non-binding basis:

Proposal 2(A): A proposal to require that any action required or permitted to be taken by the stockholders of New Summit must be taken at a duly called annual or special meeting of stockholders of New Summit and may not be taken by any consent in writing by such stockholders.

Proposal 2(B): A proposal to provide that special meetings of stockholders of New Summit may be called only by or at the direction of the New Summit Board, the Chairman thereof or the Chief Executive Officer.

Proposal 2(C): A proposal to provide that the New Summit Board may, without stockholder approval, authorize the issuance of Preferred Stock from time to time in one or more series, and with respect to each series of Preferred Stock, fix and state by resolution the designation and the powers, preferences, rights, qualifications, limitations and restrictions relating to each series of Preferred Stock;

Proposal 2(D): A proposal to provide that the New Summit Board may, without stockholder approval, authorize the issuance of Blank Check Common Stock from time to time in one or more series, and with respect to each series of Blank Check Common Stock, fix and state by resolution the designation and the powers, privileges, rights, qualifications, limitations and restrictions relating to each series of Blank Check Common Stock;

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Proposal 2(E): A proposal to adopt the Court of Chancery of the State of Delaware (or, if and only if the Court of Chancery of the State of Delaware lacks requisite subject matter jurisdiction, any state court located within the State of Delaware or, if and only if all such state courts lack subject matter jurisdiction, the federal district court for the District of Delaware) and any appellate court therefrom as the exclusive forum for certain stockholder litigation and the federal district courts of the United States of America as the exclusive forum for resolving any complaint asserting a cause of action arising under the Securities Act against New Summit or any director, officer, employee or agent of New Summit, unless New Summit consents in writing to the selection of an alternative forum.

Reference is made to the Proposed Governing Documents, forms of which are included as exhibits to the Merger Agreement, a copy of which is attached as Annex A to this proxy statement/prospectus. All stockholders are encouraged to read the Proposed Governing Documents in their entirety for a complete description of their terms. For additional information, see “Comparison of the Rights of Stockholders and Unitholders.”

The holders of Common Units may also be asked to consider other matters as may properly come before the Special Meeting. At this time, the Partnership, the General Partner and New Summit know of no other matters that will be presented for the consideration of the holders of Common Units at the Special Meeting.

Quorum

A majority of the outstanding Common Units as of the Record Date represented virtually at the Special Meeting or by proxy (by submitting a properly executed proxy card or properly submitting a proxy by Internet) will constitute a quorum and will permit the Partnership to conduct the proposed business at the Special Meeting. Proxies received but marked as abstentions and broker non-votes (if any) will be counted as Common Units that are present and entitled to vote for purposes of determining the presence of a quorum.

Record Date

The Record Date for the Special Meeting is the close of business on June 7, 2024. Unitholders may vote at the Special Meeting if they owned Common Units at the close of business on the Record Date. Unitholders may cast one vote for each Common Unit owned on the Record Date.

Votes Required

The shares of Series A Preferred Stock that holders of Series A Preferred Units will receive upon consummation of the Corporate Reorganization have substantially similar rights, preferences and privileges as the Series A Preferred Units. The holders of Series A Preferred Units are not being asked to approve the Merger Agreement or any of the other Proposals being presented to holders of Common Units, as contemplated by the Partnership Agreement.

The votes on each Proposal are separate and apart from the votes on the other Proposals. Accordingly, holders of Common Units may vote to approve certain of the Proposals and vote not to approve other Proposals. Because the votes on the Advisory Governing Documents Proposals are advisory in nature only, they will not be binding on the Partnership or New Summit.

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Units Outstanding

As of the close of business on the Record Date, there were 10,648,686 Common Units outstanding held by 77 holders of record. Each outstanding Common Unit entitles its holder of record to one vote on each matter such holder is being asked to approve at the Special Meeting. Pursuant to the Partnership Agreement, the holders of the Common Units are entitled to vote on the Merger Proposal and the Advisory Governing Documents Proposals.

Adjournments

If, at the Special Meeting, the number of Common Units present or represented and voting in favor of the Merger Proposal is insufficient to approve the Merger Proposal, the General Partner intends to adjourn the Special Meeting in order to enable the GP Board to solicit additional proxies for approval of the Merger Proposal. If it is deemed necessary to adjourn the Special Meeting, no notice of the adjourned meeting is required to be given to unitholders, other than an announcement at the Special Meeting of the time and place to which the meeting is adjourned, unless the adjournment is for more than 45 days or a new record date is fixed for the adjourned meeting, in which case notice of the place, date and time of adjourned meeting shall be given to persons who are holders of Common Units as of the new record date.

Pursuant to the Partnership Agreement, the Special Meeting may be adjourned by the General Partner one or more times for any reason, including the failure of a quorum to be present at the Special Meeting or the failure of any Proposal to receive sufficient votes for approval, regardless of whether action has been taken on any other matters. No vote of the unitholders is required for any adjournment.

At the adjourned Special Meeting, the Partnership may transact any business that might have been transacted at the original Special Meeting. If the adjournment is for more than 45 days or if a new record date is fixed for the adjourned Special Meeting, a notice of the adjourned Special Meeting shall be given to all unitholders as of the new record date. References to the Special Meeting in this proxy statement/prospectus are to such Special Meeting as adjourned or postponed.

Voting Procedure

Voting by Unitholders. If you are a unitholder who holds Common Units in your own name, you may submit your proxy using any of the following methods:

• go to the Internet website listed on your proxy card and follow the instructions provided;

• complete, sign and mail your proxy card in the postage-paid envelope; or

• attend the Special Meeting and vote electronically during the virtual Special Meeting (you will need your control number found on your proxy card or voting instruction form).

If you have timely and properly submitted your proxy, clearly indicated your vote and have not revoked your proxy, your Common Units will be voted as indicated. If you have timely and properly submitted your proxy but have not clearly indicated your vote, your Common Units will be voted FOR the Merger Proposal and FOR the Advisory Governing Documents Proposals.

Revocation. If you hold your Common Units in your own name, you may revoke your proxy at any time prior to its exercise by:

• submitting your valid, signed and later-dated proxy by mail (provided that later-dated proxy is received by 11:59 p.m. Central time on July 17, 2024);

• submitting your valid proxy over the Internet by 11:59 p.m. Central time on July 17, 2024; or

• voting during the Special Meeting.

Your presence without voting at the Special Meeting will not automatically revoke your proxy, and any revocation during the Special Meeting will not affect votes previously taken.

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Validity. The inspector of election will determine all questions as to the validity, form, eligibility (including time of receipt) and acceptance of proxies. Their determination will be final and binding. The GP Board has the right to waive any irregularities or conditions as to the manner of voting. The Partnership may accept your proxy by any form of communication permitted by applicable law so long as the Partnership is reasonably assured that the communication is authorized by you.

Solicitation of Proxies. The accompanying proxy is being solicited by the Partnership on behalf of the GP Board. The expenses of preparing, printing and mailing the proxy and materials used in the solicitation will be borne by the Partnership.

Morrow Sodali LLC has been retained by the Partnership to aid in the solicitation of proxies for an initial fee of $25,000 and the reimbursement of out-of-pocket expenses. In addition to the mailing of this proxy statement/prospectus, proxies may also be solicited from unitholders by personal interview, telephone, fax or other electronic means by directors and officers of the General Partner and employees of affiliates of the Partnership who provide services to the Partnership, who will not receive additional compensation for performing that service. Arrangements also will be made with brokerage houses and other custodians, nominees and fiduciaries for the forwarding of proxy materials to the beneficial owners of Common Units held by those persons, and the Partnership will reimburse them for any reasonable expenses that they incur.

Units Held in Street Name. If you hold Common Units in the name of a bank, broker or other nominee, you should follow the instructions provided by your bank, broker or other nominee when voting your Common Units or when granting or revoking a proxy.

As a general rule, absent specific instructions from you, your bank, broker or other nominee is not allowed to vote your Common Units on any proposal on which your bank, broker or other nominee does not have discretionary authority. The only proposals for consideration at the Special Meeting are the Merger Proposal and the Advisory Governing Documents Proposals, which are non-discretionary matters for which banks, brokers or other nominees do not have discretionary authority to vote. To instruct your bank, broker or other nominee how to vote, you should follow the directions that your bank, broker or other nominee provides to you.

Householding of Proxy Statement/Prospectus

The SEC has adopted rules that permit companies and intermediaries such as brokers to satisfy delivery requirements for proxy statements and annual reports with respect to two or more securityholders sharing the same address by delivering a single proxy statement or annual report, as applicable, addressed to those securityholders.

As permitted by the Exchange Act, only one copy of this proxy statement/prospectus is being delivered to unitholders residing at the same address, unless the unitholders have notified the Partnership of their desire to receive multiple copies of this proxy statement/prospectus. This process, which is commonly referred to in this proxy statement/prospectus as “householding,” potentially provides extra convenience for securityholders and cost savings for companies.

If, at any time, you no longer wish to participate in householding and would prefer to receive a separate copy of this proxy statement/prospectus, or if you are receiving multiple copies of this proxy statement/prospectus and wish to receive only one, please contact the Partnership at its address identified below. The Partnership will promptly deliver, upon oral or written request, a separate copy of this proxy statement/prospectus to any unitholder residing at an address to which only one copy was mailed. Requests for additional copies should be directed to:

Summit Midstream GP, LLC
910 Louisiana Street, Suite 4200
Houston, Texas 77002
(832) 413-4770
Attention: Secretary

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THE CORPORATE REORGANIZATION

Overview

On May 31, 2024, New Summit, Merger Sub, the Partnership and the General Partner entered into the Merger Agreement, pursuant to which Merger Sub, a subsidiary of New Summit, will merge with and into the Partnership, with the Partnership continuing as the surviving entity and a wholly-owned subsidiary of New Summit.

Background of the Corporate Reorganization

The GP Board has, from time to time, reviewed and evaluated potential strategic alternatives with management of the Partnership (“Summit management” or “management”), including possible acquisitions, business combinations and capital or debt offerings. In this context, the GP Board has discussed various strategic alternatives that could potentially complement, enhance or improve both the competitive strengths and strategic position of the Partnership. These discussions have included the potential simplification of the Partnership’s structure and the corporate reorganization of the Partnership to convert from a master limited partnership to a C corporation. The GP Board has considered these alternatives in connection with its evaluation of the strategic goals and initiatives of the Partnership. From time to time, Summit management also had informal discussions with advisors regarding potential strategic transactions and engaged in exploratory discussions and evaluations of the potential benefits of, and other considerations regarding, these transactions.

On August 8, 2023, the GP Board held a meeting, at which members of Summit management presented a tax update to the GP Board regarding, among other things, the decline in master limited partnerships due to acquisitions and C corporation conversions and provided a summary of certain benefits and other considerations if the Partnership reorganized from a master limited partnership to a C corporation. The GP Board instructed Summit management to perform additional analysis and report back to it about the merits of a reorganization from a master limited partnership to a C corporation.

In connection with its evaluation of a reorganization from a master limited partnership to a C corporation, the Partnership engaged Kirkland & Ellis LLP (“Kirkland”) as legal advisor.

From September 2023 through present, Deloitte & Touche LLP, the Partnership’s tax advisor (“Deloitte”), provided tax advice and tax modeling data for Summit management and TD Securities (USA) LLC, the Partnership’s financial advisor (“TD”), to assess the impact of various tax structures related to the conversion of the Partnership from a master limited partnership to a C corporation.

On each of September 28, 2023 and October 4, 2023, members of Summit management, Kirkland, TD and Deloitte participated in a call to discuss, among other things, potential options for the Partnership’s structure, including maintaining the master limited partnership structure and the potential benefits and considerations, including tax implications, of such options.

On October 3, 2023, the Partnership issued a press release announcing that the GP Board engaged external advisors to evaluate strategic alternatives for the Partnership with the goal of maximizing value for the Partnership’s unitholders. This review of strategic alternatives was conducted as a result of a recent decrease in the Partnership’s unit price along with interest received from third parties for potential transactions ranging from the sale of specific assets to consideration for the whole Partnership. The strategic alternative review has resulted in the (i) November 2023 refinancing of the 2025 Senior Notes and related amendments to the ABL Facility, (ii) Utica Divestiture in March 2024, (iii) Mountaineer Divestiture in May 2024, and (iv) determination to seek unitholder approval for the Corporate Reorganization.

From the third quarter of 2023 through present, the Partnership was focused on maximizing cash flow generation, reducing its indebtedness, conducting its strategic alternatives review, and further analyzing a reorganization from a master limited partnership to a C corporation.

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On October 16, 2023, the Partnership entered into an engagement letter with TD to render financial advisory and investment banking services to the GP Board and the Partnership in connection with the Partnership’s proposed reorganization from a master limited partnership to a C corporation for federal income tax purposes and the GP Board instructed its legal and financial advisors to continue working with Summit management to assist the GP Board in its evaluation of potential strategic opportunities. Also on October 16, 2023, Summit management, Kirkland and TD participated in a call to further discuss potential strategic transactions that may be reasonably available to the Partnership.

In late October and November 2023, the GP Board, with the assistance of Summit management and Kirkland, TD and Deloitte, continued to explore, through a series of calls, potential transaction structures to reorganize the Partnership, including that which ultimately would become the Corporate Reorganization.

On November 1, 2023, the GP Board held a meeting, at which Summit management and representatives of Kirkland, TD and Morrow Sodali LLC (“Morrow”) were present in order to discuss the potential transaction. Members of Summit management and Kirkland presented to the GP Board regarding, among other things, the Partnership’s master limited partnership legal characteristics and its distinction from other master limited partnerships, taxable and non-taxable reorganization alternatives, indebtedness considerations and tax considerations relating to the Corporate Reorganization. After discussion of all the topics presented by Summit management, with the assistance of Kirkland, TD and Morrow, the GP Board determined that Summit management should continue to evaluate, with the assistance of its external advisors, potential strategic transactions, including the Corporate Reorganization.

On March 6, 2024, Summit management, Kirkland and TD participated in a call to discuss, among other things, the proposed transaction structure, timing and progress.

In March 2024, the Partnership announced that the GP Board and Summit management had completed the active strategic review, but would continue to evaluate other transactions as they developed. The Corporate Reorganization is a continuation of the results of our previously completed strategic review. The Partnership has received, from time to time, proposals from unaffiliated third-parties with respect to acquisitions of certain of our assets; however, the Partnership does not view any such transactions as probable to occur at this time.

On March 20, 2024, the GP Board held a meeting at which Summit management provided an update to its strategic alternatives review, including a discussion about bank consents needed for the Utica Divestiture and Summit management’s intent to negotiate for amendments that allow for the Corporate Reorganization.

On March 22, 2024, the Partnership entered into that certain Fourth Amendment to Loan and Security Agreement (the “ABL Amendment”) by and among the Partnership, Summit Midstream Holdings, LLC, (“Holdings”), the subsidiaries of Holdings party thereto, as subsidiary guarantors, and Bank of America, N.A., as administrative agent (“Bank of America”), pursuant to which Holdings amended its revolving credit facility governed by that certain Loan and Security Agreement dated as of November 2, 2021 (as amended, restated, supplemented or otherwise modified prior to the date hereof, the “Credit Agreement”) by and among the Partnership, as parent guarantor, Holdings, as borrower, the subsidiaries of Holdings party thereto, as subsidiary guarantors, the lenders party thereto from time to time and Bank of America. The ABL Amendment includes amendments to the Credit Agreement that, among other things, amend the change of control provision to permit certain structural changes in connection with a reorganization to a C corporation.

On May 1, 2024, a meeting of the GP Board was held, at which representatives of Kirkland were present. The GP Board met to consider the proposed Corporate Reorganization and, after having considered all facts relevant to its consideration of the Corporate Reorganization, instructed Summit management to work with its legal and financial advisors to finalize the Corporate Reorganization on the terms discussed.

On May 28, 2024, (i) the Partnership’s management updated the GP Board on the terms of the Corporate Reorganization in reference to the summary from May 1, 2024 and (ii) the GP Board unanimously approved, among other things, the then-current form of Merger Agreement and determined that it was advisable and in the best interests of the Partnership, its subsidiaries and the unitholders. On May 31, 2024, (i) the GP Board unanimously approved, via written consent, incremental changes to the Merger Agreement from the form approved at the May 28, 2024 meeting of the GP Board and determined that the Merger Agreement was advisable and in the best interests of the Partnership, its subsidiaries and the unitholders and (ii) the Merger Agreement was executed by the parties thereto.

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The Partnership has had and continues to have discussions with unaffiliated third-parties with respect to a Proposed Transaction. The Corporate Reorganization is not contingent upon the entry into or consummation of a Potential Transaction and the GP Board expects to proceed with the Corporate Reorganization regardless of the status of any Potential Transaction. We expect that any Potential Transaction would be contingent upon the consummation of the Corporate Reorganization. These discussions include Potential Transactions in which the counterparties would acquire control of the Partnership or, after the Corporate Reorganization, New Summit. See “Summary — Recent Developments.”

Recommendation of the GP Board and Reasons for the Corporate Reorganization

The GP Board has determined that the Merger is advisable and in the best interests of the Partnership, its subsidiaries and the unitholders; approved the Merger Agreement and the execution, delivery and performance of the Merger Agreement and the transactions contemplated thereby; and resolved to submit the Merger Agreement to a vote of the holders of Common Units and recommend approval of the Merger Agreement by the holders of Common Units. Accordingly, the GP Board unanimously recommends that the holders of Common Units vote FOR the approval of the Merger Proposal.

In reaching its determinations and recommendations described above, the GP Board consulted with the Partnership’s senior management, financial and tax advisors and outside legal counsel. These consultations included discussions regarding the Partnership’s strategic business plan, the Partnership’s past and current business operations and financial condition and performance, the Partnership’s future prospects, other potential strategic alternatives that may be available to the Partnership and the potential Corporate Reorganization. The GP Board considered a number of substantive factors, both positive and negative, and potential benefits and detriments of the Corporate Reorganization to the Partnership and the unitholders. Certain factors considered by the GP Board, in addition to the matters described above under “— Background of the Corporate Reorganization,” are summarized below (which are not listed in any relative order of importance).

Expected Benefits of the Corporate Reorganization

In determining that the Merger and the Merger Agreement are advisable and in the best interests of the Partnership, its subsidiaries and the unitholders, and in reaching its decision to approve the Merger Agreement and the Merger, the GP Board considered a variety of factors that it believed weighed favorably toward the Corporate Reorganization, including the following factors:

Consideration of investor’s tax obligations. The GP Board believes the continued suspension of Partnership distributions, ongoing allocation of Partnership income to investors, escalating statutory phaseouts of bonus depreciation deductions, limitations on interest expense deductions, and low prospects for tax law changes are significant factors that no longer support the Partnership remaining in a pass-through structure. The Corporate Reorganization is expected to reduce the investor’s tax burden going forward, including by eliminating the recapture of previously allocated Partnership items.

Simplifies governance structure and enhances fiduciary duties benefiting equityholders. In connection with the Corporate Reorganization, New Summit will have a customary corporate governance model, with New Summit’s directors and officers subject to corporate fiduciary duties. The GP Board believes that this simplified governance structure and enhanced fiduciary duties will benefit the unitholders of the Partnership and, following the consummation of the Corporate Reorganization, the stockholders of New Summit.

Allows for access to lower cost of capital to fund future growth and an improved credit profile. The GP Board believes that the transition to a corporate entity should increase New Summit’s access to, and lower the cost of, capital through an expanded field of investors, as many investors are unwilling or unable to invest in pass-through entities. The GP Board believes that such improvements will enhance New Summit’s ability to fund greater growth efforts and address its credit profile, including its liquidity.

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Other Factors Considered

During the course of its deliberations relating to the Corporate Reorganization, the GP Board considered the following factors in addition to the benefits described above:

• The terms and conditions of the Merger Agreement, including:

• provisions allowing the Partnership to terminate the Merger Agreement if the GP Board concludes that recommending approval of the Merger Agreement would be inconsistent with its duties to the holders of Common Units under applicable law; and

• the fact that the representations and warranties of the Partnership do not survive the consummation of the Corporate Reorganization.

• The Merger Agreement and the Merger are subject to the approval of the holders of Common Units such that the holders of Common Units are free to reject the Corporate Reorganization if a superior proposal is made or for any other reason.

• The ability to obtain waivers under the ABL Agreement to allow for the Corporate Reorganization and waive any impacts that could occur as a result of the Corporate Reorganization constituting a Change of Control thereunder.

• The terms of the Proposed Governing Documents that will be in effect upon consummation of the Corporate Reorganization.

The GP Board weighed these advantages and opportunities against a number of other factors identified in its deliberations weighing negatively against the Corporate Reorganization, including:

• the possible disruption to the Partnership’s business that may result from the Corporate Reorganization and the resulting distraction of the attention of the Partnership’s management, as well as the costs and expenses associated with completing the Corporate Reorganization;

• the possibility that the Corporate Reorganization might not be consummated despite the parties’ efforts or that the closing of the Corporate Reorganization might be unduly delayed; and

• the risks of the type and nature described under “Risk Factors” and the matters described under “Cautionary Statement Regarding Forward-Looking Statements.”

After consideration of these factors, the GP Board determined that these risks could be mitigated or managed by the Partnership or, following the Corporate Reorganization, by New Summit, were reasonably acceptable under the circumstances or, in light of the anticipated benefits overall, were significantly outweighed by the potential benefits of the Corporate Reorganization.

The General Partner and the GP Board have not, including, without limitation, in making the determinations set forth above, assumed any obligations to the Partnership or its limited partners (whether fiduciary, contractual, implied, or otherwise) other than obligations that may exist in the Partnership Agreement. Under the Partnership Agreement, whenever the General Partner makes a determination or takes any other action, in its capacity as the general partner of the Partnership, the General Partner must make such determination or take such other action in good faith and is not subject to any other or different standard (including fiduciary duties) under applicable law (other than the implied contractual covenant of good faith and fair dealing). A determination or other action or inaction will conclusively be deemed to be in “good faith” for purposes of the Partnership Agreement if the General Partner subjectively believes that the determination or other action or inaction is in the best interests of the Partnership. Nothing in this proxy statement/prospectus or the actions or determinations of the General Partner or the GP Board described in this proxy statement/prospectus should be read to mean that the General Partner or the GP Board assumed any obligations to the Partnership or its limited partners (whether fiduciary, contractual, implied, or otherwise) other than obligations that may exist in the Partnership Agreement. See “Where You Can Find More Information” on page 210.

This discussion of the information and factors considered by the GP Board in making its decision is not intended to be exhaustive but rather reflects certain factors considered by the GP Board. In view of the wide variety of factors considered in connection with its respective evaluation of the Corporate Reorganization and

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the complexity of these matters, the GP Board did not find it useful to, and did not attempt to, quantify, rank or otherwise assign relative weights to these factors. In addition, individual members of the GP Board may have given different weight to different factors.

The GP Board realized that there can be no assurance about future results, including results considered or expected as described in the factors listed above. It should be noted that this explanation of the reasoning of the GP Board and all other information presented in this section are forward-looking in nature and, therefore, should be read in light of the factors discussed under the heading “Cautionary Statement Regarding Forward-Looking Statements.”

The GP Board has unanimously recommended that the holders of Common Units vote FOR the Merger Proposal.

No Appraisal Rights or Dissenters’ Rights

Antitrust and Regulatory Matters

The Partnership and New Summit have determined that the Corporate Reorganization is not subject to the requirements of the HSR Act, and no other governmental consents are required.

Listing of New Summit Common Stock; Delisting of the Units

The former holders of Common Units and the former holders of Series A Preferred Stock will become stockholders of New Summit, and their rights as stockholders will be governed by Delaware law and by the Proposed Governing Documents that will be in effect upon consummation of the Corporate Reorganization.

Accounting Treatment of the Merger

Interests of Certain Persons in the Merger

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New Summit’s Board of Directors and Management

• Lee Jacobe and Jerry L. Peters will be Class I directors, whose initial terms will expire at the 2025 annual meeting of stockholders;

• J. Heath Deneke, Robert J. McNally and Marguerite Woung-Chapman will be Class II directors, whose initial terms will expire at the 2026 annual meeting of stockholders; and

• James J. Cleary and Rommel M. Oates will be a Class III directors, whose initial terms will expire at the 2027 annual meeting of stockholders.

Indemnification; Directors’ and Officers’ Insurance

The Merger Agreement generally provides that, for a period of six (6) years following the Merger, New Summit will indemnify, defend, and hold harmless all current and former directors, officers, and employees of the Partnership against costs and expenses, judgments, fines, losses, claims, damages, and liabilities incurred in connection with any claim, action, suit, proceeding, or investigation arising out of matters existing or occurring prior to the Effective Time and based on the fact that such individuals were directors, officers, or employees of the Partnership (or were serving at the request of the Partnership as a director, officer, employee, agent, trustee, or partner of another corporation, partnership, trust, joint venture, employee benefit plan, or other entity), to the fullest extent these individuals would have been entitled to be indemnified, defended, and held harmless under applicable law and the certificate of formation and limited liability company agreement of the General Partner and the Partnership Agreement as in effect as of the Effective Time.

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The Merger Agreement requires New Summit to maintain in effect for six (6) years following the Effective Time, directors’ and officers’ liability insurance policies covering acts or omissions occurring at or prior to the Effective Time providing at least the same coverage and amounts and containing terms and conditions that are not less advantageous than currently provided for by the Partnership’s existing directors’ and officers’ liability insurance with respect to claims against those individuals covered by such existing policies arising from facts or events that occurred at or prior to the consummation of the Merger.

No Severance Payments

No executive officer of the Partnership or New Summit is entitled to or will receive any severance payments in connection with the Corporate Reorganization.

Treatment of the Partnership Equity Awards

Pursuant to the Merger Agreement, at the Effective Time, each outstanding Partnership Phantom Unit Award will be converted into an award of New Summit RSUs equal to the product of (a) the number of Common Units subject to such Partnership Phantom Unit Award as of immediately prior to the Effective Time, multiplied by (b) the Common Unit Exchange Ratio. The New Summit RSUs will be subject to substantially the same terms and conditions as were applicable to the converted Partnership Phantom Unit Awards, including vesting and payment timing provisions, as applicable.

Security Ownership of Directors and Executive Officers

Nearly all of the directors and executive officers of the General Partner beneficially own Common Units and will receive the applicable Merger Consideration upon consummation of the Corporate Reorganization. The following table sets forth the beneficial ownership of the directors and executive officers of the General Partner (and, following the consummation of the Corporate Reorganization, New Summit) in (i) Common Units prior to the Corporate Reorganization and (ii) Common Stock after giving effect to the Corporate Reorganization, in each case as of May 28, 2024.

Name of Beneficial Owner(1)	Common Units	Percentage of Common Units Outstanding		Shares of Common Stock after the Corporate Reorganization	Percentage of Shares of Common Stock Outstanding after the Corporate Reorganization
J. Heath Deneke	288,006	2.7	%	288,006	2.7	%
William J. Mault	40,282	*		40,282	*
James D. Johnston	51,601	*		51,601	*
Matthew B. Sicinski	20,658	*		20,658	*
James J. Cleary	30,209	*		30,209	*
Lee Jacobe	38,891	*		38,891	*
Robert J. McNally	30,209	*		30,209	*
Rommel M. Oates	19,375	*		19,375	*
Jerry L. Peters(2)	30,239	*		30,239	*
Marguerite Woung-Chapman	30,209	*		30,209	*
All directors and executive officers of the General Partner and New Summit as a group (10 persons)	579,679	5.4	%	579,679	5.4	%

____________

* Less than 1%.

(1) The address for each person is 910 Louisiana Street, Suite 4200, Houston, TX 77002.

(2) Mr. Peters holds such Common Units in a joint spousal trust for which his spouse shares voting and investment power with respect to such Common Units.

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THE MERGER AGREEMENT

The following describes the material provisions of the Merger Agreement, which is attached as Annex A and incorporated by reference herein. The description in this section and elsewhere in this proxy statement/prospectus is qualified in its entirety by reference to the Merger Agreement. This summary does not purport to be complete and may not contain all of the information about the Merger Agreement that is important to you. The Partnership and New Summit encourage you to read carefully the Merger Agreement in its entirety before making any decisions regarding the Merger as it is the legal document governing the Merger.

The Merger Agreement and this summary of its terms have been included to provide you with information regarding the terms of the Merger Agreement.

Factual disclosures about the Partnership or New Summit or any of their respective subsidiaries or affiliates contained in this proxy statement/prospectus or their respective public reports filed with the SEC may supplement, update or modify the factual disclosures about the Partnership or New Summit or their respective subsidiaries or affiliates contained in the Merger Agreement and described in these summaries. The representations, warranties and covenants made in the Merger Agreement by the Partnership and New Summit, as applicable, were qualified and subject to important limitations agreed to by the Partnership and New Summit, respectively, in connection with negotiating the terms of the Merger Agreement. In particular, in your review of the representations and warranties contained in the Merger Agreement and described in this summary, it is important to bear in mind that the representations and warranties were negotiated with the principal purposes of allocating risk between the parties to the Merger Agreement, rather than establishing matters as facts. The representations and warranties may also be subject to a contractual standard of materiality different from those generally applicable to stockholders or unitholders and reports and documents filed with the SEC. For the foregoing reasons, the representations, warranties and covenants or any descriptions of those provisions should not be read alone.

The Merger

Subject to the terms and conditions of the Merger Agreement and in accordance with Delaware law, at the Effective Time, Merger Sub, a subsidiary of New Summit, will merge with and into the Partnership, with the Partnership continuing as the surviving entity and a wholly-owned subsidiary of New Summit.

Effective Time; Closing

The Effective Time will occur at such time as the Partnership and New Summit cause a certificate of merger to be duly filed with the Secretary of State of the State of Delaware or at such later date or time as may be agreed by the Partnership and New Summit in writing and specified in the certificate of merger.

The closing of the Merger will take place on the second business day after the satisfaction or waiver of the conditions set forth in the Merger Agreement (other than conditions that by their nature are to be satisfied at the closing but subject to the satisfaction or waiver of those conditions), or at such other place, date and time as the Partnership and New Summit may agree.

Unitholder Approval

The Partnership has agreed to hold the Special Meeting as promptly as practicable for purposes of obtaining the unitholder approval. See “The Special Meeting.”

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Conditions to Consummation of the Merger

The Partnership and New Summit may not complete the Merger unless each of the following conditions is satisfied or waived:

• the Merger Agreement must have been approved by the affirmative vote of the holders of a majority of the outstanding Common Units;

• no restraints are in effect enjoining, restraining, preventing or prohibiting the consummation of the transactions contemplated by the Merger Agreement or making the consummation of the transactions contemplated by the Merger Agreement illegal;

• a joinder to the ABL Agreement must have been executed and delivered by New Summit, and New Summit must have executed and delivered such other documents as are reasonably requested by the Partnership, and must have taken such actions necessary or reasonably advisable as determined by the Partnership, to guarantee the Obligations (as defined in the ABL Agreement);

• the GP Board must authorize the consummation of the Merger following the satisfaction or the waiver of the other conditions precedent to consummate the Merger.

The obligations of New Summit and Merger Sub to effect the Merger are subject to the satisfaction or waiver of the following additional conditions:

• the Partnership and the General Partner having performed in all material respects all obligations required to be performed by each of them under the Merger Agreement; and

The obligation of the Partnership to effect the Merger is subject to the satisfaction or waiver of the following additional conditions:

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• New Summit and Merger Sub having performed in all material respects all obligations required to be performed by each of them under the Merger Agreement; and

• the receipt by the Partnership of an officer’s certificate signed on behalf of New Summit by an executive officer of New Summit certifying that the preceding conditions have been satisfied.

For purposes of the Merger Agreement, the term “material adverse effect” means, when used with respect to a person, any change, effect, event or occurrence that, individually or in the aggregate, has had or would reasonably be expected to have a material adverse effect on the business, financial condition or results of operations of such person and its subsidiaries, taken as a whole; provided, however, that “material adverse effect” shall not include (i) any effect resulting from entering into the Merger Agreement or the announcement of the transactions contemplated by the Merger Agreement, (ii) any effect resulting from changes in general market, economic, financial, regulatory or political conditions or any outbreak of hostilities or war, terrorism, earthquakes, hurricanes, tornadoes, floods or other natural disasters, (iii) any effect that affects the hydrocarbon exploration, production, development, processing, gathering and/or transportation industry generally (including changes in commodity prices or general market prices in the hydrocarbon exploration, production, development, processing, gathering and/or transportation industry generally), and (iv) any effect resulting from a change in laws or regulatory policies.

The Merger Consideration

At the Effective Time:

• each outstanding Common Unit will be converted into the right to receive 1.000 shares of Common Stock; and

• each outstanding Series A Preferred Unit will be converted into the right to receive 1.000 shares of Series A Preferred Stock for each outstanding Series A Preferred Unit;

Treatment of the Partnership Equity Awards

Adjustments to Prevent Dilution

The Merger Consideration will be appropriately adjusted to reflect fully the effect of any unit or share dividend, subdivision, reclassification, recapitalization, split, split-up, unit or share distribution, combination, exchange of limited partner interests or shares or similar transaction with respect to the number of outstanding Units prior to the Effective Time to provide the unitholders the same economic effect as contemplated by the Merger Agreement prior to such event, except that, if giving effect to any such adjustment would result in a fraction of a share of Common Stock or Series A Preferred Stock being issuable to a unitholder, such unitholder will receive the number of shares of Common Stock or Series A Preferred Stock rounded up to the nearest whole share.

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Withholding

New Summit, Merger Sub, the Partnership and the exchange agent will be entitled to deduct and withhold from the consideration otherwise payable pursuant to the Merger Agreement such amounts, if any, as are required to be deducted and withheld with respect to the making of such payment under applicable tax law. To the extent amounts are so withheld, such withheld amounts will be treated as having been paid to the former unitholders in respect of whom such withholding was made.

Dividends and Distributions

No dividends or other distributions declared or made after the Effective Time with respect to shares with a record date after the Effective Time will be paid to the holder of any un-surrendered certificates or book-entry Units with respect to shares represented thereby, unless and until the holder of such certificates or book-entry Units shall surrender such certificate or book-entry unit. Subject to the effect of escheat, tax or other applicable law, following surrender of any such certificate, there will be paid by New Summit to the holder of the shares issued in exchange therefor, without interest, (i) promptly, the amount of dividends or other distributions with a record date after the Effective Time theretofore paid with respect to such shares and (ii) at the appropriate payment date, the amount of dividends or other distributions, with a record date after the Effective Time but prior to surrender and a payment date occurring after surrender, payable with respect to such shares.

Antitrust and Regulatory Matters

The Partnership and New Summit have determined that the Corporate Reorganization is not subject to the requirements of the HSR Act, and no other governmental consents are required.

Termination

The Partnership and New Summit may terminate the Merger Agreement at any time prior to the Effective Time by mutual written consent authorized by the New Summit Board and GP Board.

In addition, either the Partnership or New Summit may terminate the Merger Agreement at any time prior to the Effective Time by written notice to the other party if:

• the closing of the Merger has not occurred on or before January 1, 2026;

• the Special Meeting is concluded and the unitholder approval is not obtained.

New Summit also may terminate the Merger Agreement if:

The Partnership also may terminate the Merger Agreement if:

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Fees and Expenses

Indemnification; Directors’ and Officers’ Insurance

Amendment and Supplement; Waiver and Consent

At any time prior to the Effective Time, the Merger Agreement may be amended or supplemented in any and all respects, whether before or after receipt of the unitholder approval, by written agreement of the parties thereto, except that, following receipt of the unitholder approval, the Merger Agreement may not be amended to its provisions which by applicable law or stock exchange rule would require further approval by the unitholders.

Representations and Warranties

The Merger Agreement contains representations and warranties by New Summit, on the one hand, and the Partnership and the General Partner, on the other hand. These representations and warranties have been made solely for the benefit of the other parties to the Merger Agreement and:

• may be intended not as statements of fact, but rather as a way of allocating the risk to one of the parties if those statements prove to be inaccurate; and

• may apply standards of materiality in a way that is different from what may be viewed as material to you or other investors.

Accordingly, these representations and warranties should not be read alone, but instead should be read only in conjunction with the information provided elsewhere in this proxy statement/prospectus, which may include information that updates, modifies or qualifies the information set forth in the representations and warranties.

The representations and warranties made by both New Summit, on the one hand, and the Partnership and the General Partner, on the other hand relate to, among other things:

• corporate organization, standing and similar corporate matters;

• capital structure;

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• due authorization of the Merger Agreement and the transactions contemplated by the Merger Agreement, absence of any conflicts with third parties created by such transactions and the voting requirements for such transactions;

• required consents and approvals of governmental entities in connection with the transactions contemplated by the Merger Agreement; and

• no other representations and warranties.

Additional Agreements

The Merger Agreement also contains covenants relating to cooperation in the preparation of this proxy statement/prospectus and additional agreements relating to, among other things, access to information, and applicability of takeover statutes.

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COMPARISON OF THE RIGHTS OF STOCKHOLDERS AND UNITHOLDERS

The rights of the unitholders are currently governed by the Partnership Agreement and the Delaware LP Act. After the Corporate Reorganization, unitholders will become stockholders, and their rights will be governed by the DGCL and the Proposed Governing Documents that will be in effect upon consummation of the Corporate Reorganization. See “Description of New Summit Capital Stock” for a summary of the terms of the Proposed Governing Documents to be in effect upon consummation of the Corporate Reorganization.

Set forth below are material differences among the rights of a holder of Common Units and Series A Preferred Units under the Partnership Agreement and the Delaware LP Act, on the one hand, and the rights of a holder of Common Stock and Series A Preferred Stock under the Proposed Governing Documents and the DGCL, on the other hand. The identification of specific differences is not intended to indicate that other equally significant or more significant differences do not exist.

The following summary does not reflect any rules of the NYSE or any other national exchange that may apply to the Partnership or New Summit in connection with the matters discussed. This summary does not purport to be a complete discussion of, and is qualified in its entirety by reference to, the Delaware LP Act, the DGCL, the Partnership Agreement, the Second Amended and Restated Limited Liability Company Agreement of the General Partner (the “GP LLC Agreement”) and the Proposed Governing Documents.

New Summit		The Partnership
Purpose and Term of Existence
New Summit’s stated purpose is to engage in any lawful act or activity for which corporations may be organized under the DGCL. New Summit is to have perpetual existence.		The Partnership’s purpose under the Partnership Agreement is to engage in any business activities that are approved by the General Partner. The General Partner, however, may not cause the Partnership to engage in any business activities that it determines would be reasonably likely to cause the Partnership to be treated as an association taxable as a corporation or otherwise taxable as an entity for federal income tax purposes. The General Partner is authorized in general to perform all acts it determines to be necessary or appropriate to carry out the Partnership’s purposes or activities of the Partnership. The Partnership has a perpetual existence.
Authorized Capital
New Summit’s authorized capital stock consists of: • 42,000,000 shares of Common Stock; • 500,000 shares of Preferred Stock, none of which were outstanding as of the date of this proxy statement/prospectus; and • 30,000,000 shares of Blank Check Common Stock, none of which were outstanding as of the date of this proxy statement/prospectus. As of the Record Date, there were 1,000 outstanding shares of Common Stock, all of which were held by the General Partner, no outstanding shares of Preferred Stock and no outstanding shares of Blank Check Common Stock.		The authorized equity interests of the Partnership consist of the Common Units, the Series A Preferred Units and the general partner interest. As of the Record Date, there were 10,648,686 outstanding Common Units and 65,508 outstanding Series A Preferred Units. As of the Record Date, the general partner interest was also outstanding. As a limited partnership, the Partnership does not have authorized capital. Rather, subject to any required approvals by holders of Series A Preferred Units, the Partnership Agreement authorizes the Partnership to issue an unlimited number of additional partnership securities for the consideration and on the terms and conditions determined by the General Partner without the approval of the unitholders.

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New Summit

The Partnership

The New Summit Charter authorizes the New Summit Board to, without stockholder approval, authorize the issuance of Preferred Stock and Blank Check Common Stock from time to time in one or more series, and with respect to each series of Preferred Stock or Blank Check Common Stock, to fix and state by resolution the designation and the powers, preferences, privileges, rights, qualifications, limitations and restrictions relating to each series of Preferred Stock or Blank Check Common Stock.

In addition, the number of authorized shares of Common Stock, Preferred Stock or Blank Check Common Stock may be increased or decreased (but not below the number of shares of capital stock then outstanding) without a separate class vote of the holders of Common Stock, Preferred Stock or Blank Check Common Stock.

Series A Preferred Stock. Upon consummation of the Corporate Reorganization, Series A Preferred Stock will rank senior to (i) Common Stock and (ii) each other class or series of equity securities of New Summit that may be established in the future that expressly ranks junior with respect to the payment of dividends and distribution of assets upon liquidation, dissolution and winding up. The Series A Preferred Stock will have no stated maturity and will not be subject to mandatory redemption or any sinking fund and will remain outstanding indefinitely unless repurchased or redeemed by New Summit except in connection with a Series A Change of Control Triggering Event (as defined in the Certificate of Designation of Series A Floating Rate Cumulative Redeemable Perpetual Preferred Stock of Summit Midstream Corporation (the “Series A Certificate of Designation”)).

New Summit may, at its option, redeem the Series A Preferred Stock, in whole or in part, at any time or from time to time, at a redemption price of (i) 102% of the Series A Liquidation Preference (as defined in the Series A Certificate of Designation) per share if redeemed prior to December 15, 2024 and (ii) 100% of the Series A Liquidation Preference per share if redeemed after December 15, 2024, plus an amount equal to all accumulated and unpaid dividends thereon to the date of redemption. In addition, New Summit may redeem the Series A Preferred Stock following certain changes of control, as described in the Series A Certificate of Designation.

Holders of Series A Preferred Stock will have no voting rights except for limited voting rights with respect to potential amendments to the Proposed Governing Documents that have a material adverse effect on the existing terms of the Series A Preferred Stock and in certain other limited circumstances or as required by law.

In accordance with Delaware law and the provisions of the Partnership Agreement, the Partnership may also issue additional partnership securities that, as determined by the General Partner, may have special voting rights to which the Common Units and the Series A Preferred Units are not entitled. The Partnership may not issue additional Series A Preferred Units, parity securities or senior securities if the cumulative distributions payable on outstanding Series A Preferred Units are in arrears unless the Partnership has received an affirmative vote or consent of the holders of at least 66 2/3% of the outstanding Series A Preferred Units and parity securities, if any.

Series A Preferred Units. The Series A Preferred Units rank senior to (i) the Partnership’s Common Units and (ii) each other class or series of limited partner interests or other equity securities in the Partnership that may be established in the future that expressly ranks junior with respect to the payment of distributions and distribution of assets upon liquidation, dissolution and winding up. The Series A Preferred Units have no stated maturity and are not subject to mandatory redemption or any sinking fund and will remain outstanding indefinitely unless repurchased or redeemed by the Partnership except in connection with a Series A Change of Control Triggering Event (as defined in the Partnership Agreement).

The Partnership may, at its option, redeem the Series A Preferred Units, in whole or in part, at any time or from time to time, at a redemption price of (i) 102% of the Series A Liquidation Preference (as defined in the Partnership Agreement) per unit if redeemed prior to December 15, 2024 and (ii) 100% of the Series A Liquidation Preference per unit if redeemed after December 15, 2024, plus an amount equal to all accumulated and unpaid distributions thereon to the date of redemption. In addition, the Partnership may redeem the Series A Preferred Units following certain changes of control, as described in the Partnership Agreement.

Holders of Series A Preferred Units have no voting rights except for limited voting rights with respect to potential amendments to the Partnership Agreement that have a material adverse effect on the existing terms of the Series A Preferred Units and in certain other limited circumstances or as required by law.

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New Summit

The Partnership

Dividends/Distributions

Subject to preferences that may be applicable to any outstanding shares or series of Preferred Stock or Blank Check Common Stock, holders of Common Stock are entitled to receive ratably such dividends and distributions (payable in cash, stock or otherwise), if any, as may be declared from time to time by the New Summit Board out of funds legally available for dividend or distribution payments.

New Summit does not expect to pay dividends on its Common Stock for the foreseeable future.

Series A Preferred Dividends. Holders of Series A Preferred Stock will be entitled to receive dividends, when, as and if declared by the New Summit Board, out of any assets of New Summit legally available for the payment of dividends. Dividends on Series A Preferred Stock shall be paid on a quarterly basis on March 15, June 15, September 15 and December 15 of each year.

Dividends on Series A Preferred Stock will accumulate at an annual rate equal to a percentage of the Series A Liquidation Preference equal to the sum of (a) the Series A Three-Month SOFR, as calculated on each applicable Periodic Term SOFR Determination Day (each, as defined in the Series A Certificate of Designation), and (b) 7.69%.

On May 3, 2020, the Partnership suspended distributions to holders of Common Units and suspended all payments of distributions to holders of the Series A Preferred Units.

Series A Preferred Distributions. Holders of Series A Preferred Units are entitled to receive distributions, when, as and if declared by the General Partner, out of any assets of the Partnership legally available for the payment of distributions. Distributions on Series A Preferred Units shall be paid on a quarterly basis on March 15, June 15, September 15 and December 15 of each year.

Distributions on Series A Preferred Units will accumulate at an annual rate equal to a percentage of the Series A Liquidation Preference equal to the sum of (a) the three-month SOFR, as calculated on each applicable determination date, and (b) 7.69%.

Distributions of Available Cash. Once all distributions payable with respect to the outstanding Series A Preferred Units are made, the Partnership Agreement requires that the Partnership distribute, within 45 days following the end of each quarter, an amount equal to 100% of Available Cash (as defined below) with respect to such quarter to the holders of the Common Units, pro rata, as of the record date selected by the General Partner. All amounts of Available Cash distributed by the Partnership on any date from any source shall be deemed to be Operating Surplus (as defined in the Partnership Agreement) until the sum of all amounts of Available Cash theretofore distributed by the Partnership to the Partners equals the Operating Surplus from the closing date through the close of the immediately preceding quarter.

“Available Cash” means, with respect to any quarter ending prior to the Liquidation Date (as defined in the Partnership Agreement):

(a) the sum of:

(i) all cash and cash equivalents of the Partnership Group (as defined in the Partnership Agreement) (or the Partnership’s proportionate share of cash and cash equivalents in the case of subsidiaries that are not wholly owned) on hand at the end of such quarter; and

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New Summit

The Partnership

(ii) if the General Partner so determines, all or any portion of additional cash and cash equivalents of the Partnership Group (or the Partnership’s proportionate share of cash and cash equivalents in the case of subsidiaries that are not wholly owned) on hand on the date of determination of Available Cash with respect to such quarter resulting from Working Capital Borrowings (as defined in the Partnership Agreement) made subsequent to the end of such quarter; less

(b) the amount of any cash reserves established by the General Partner (or the Partnership’s proportionate share of cash reserves in the case of subsidiaries that are not wholly owned) to:

(i) provide for the proper conduct of the business of the Partnership Group (including reserves for future capital expenditures and for anticipated future credit needs of the Partnership Group) subsequent to such quarter;

(ii) comply with applicable law or any loan agreement, security agreement, mortgage, debt instrument or other agreement or obligation to which any Group Member (as defined in the Partnership Agreement) is a party or by which it is bound or its assets are subject;

(iii) provide funds for Series A Distributions; or

(iv) provide funds for distributions to the holders of Common Units in respect of any one or more of the next four quarters;

provided, however, that disbursements made by a Group Member or cash reserves established, increased or reduced after the end of such quarter but on or before the date of determination of Available Cash with respect to such quarter shall be deemed to have been made, established, increased or reduced, for purposes of determining Available Cash within such quarter if the General Partner so determines.

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New Summit

The Partnership

Business Combinations

Under the DGCL, the consummation of a merger or consolidation generally requires the approval of the board of directors of a corporation that is a constituent corporation in the merger or consolidation and requires that the agreement of merger or consolidation be adopted by the affirmative vote of the holders of a majority of the stock of that corporation entitled to vote thereon at an annual or special meeting for the purpose of acting on the agreement.

No such approval and vote are required if such constituent corporation is the surviving corporation and:

• such corporation’s certificate of incorporation is not amended;

• each share of stock of such constituent corporation whose shares were outstanding immediately before the effective date of the merger is to be an identical outstanding or treasury share of the surviving corporation, immediately after the effective date of the merger; and

• either no shares of common stock of the surviving corporation and no shares, securities or obligations convertible into such stock are to be issued or delivered under the plan of merger, or the authorized unissued shares or the treasury shares of common stock of the surviving corporation to be issued or delivered under the plan of merger plus those initially issuable upon conversion of any other shares, securities or obligations to be issued or delivered under the plan do not exceed 20% of the shares of common stock of such corporation outstanding immediately prior to the effective date of the merger.

New Summit is not subject to the provisions of Section 203 of the DGCL.

A merger, consolidation or conversion of the Partnership requires the prior consent of the General Partner. The General Partner, however, has no duty or obligation to consent to any merger, consolidation or conversion and may decline to do so free of any duty or obligation whatsoever to the Partnership or the limited partners, including any duty to act in good faith or in the best interest of the Partnership or the limited partners.

In addition, the Partnership Agreement generally prohibits the General Partner, without the prior approval of a majority of the votes cast by the holders of Common Units entitled to vote on the matter at a meeting at which a quorum is present (a “Unit Majority”), from causing the Partnership, among other things, to sell, exchange or otherwise dispose of all or substantially all of the Partnership’s assets in a single transaction or a series of related transactions, including by way of merger, consolidation or other combination or sale of ownership interests of the Partnership’s subsidiaries. The General Partner may, however, mortgage, pledge, hypothecate or grant a security interest in all or substantially all of the Partnership’s assets without Unit Majority approval. The General Partner may also sell all or substantially all of the Partnership’s assets under a foreclosure or other realization upon those encumbrances without that approval. Finally, the General Partner may consummate any merger without the prior approval of a Unit Majority if the Partnership is the surviving entity in the transaction, the transaction would not result in an amendment to the Partnership Agreement that could not otherwise be adopted solely by the General Partner, each partnership security will be an identical partnership security following the transaction, and the partnership securities to be issued do not exceed 20% of the outstanding partnership interests immediately prior to the transaction.

If the conditions specified in the Partnership Agreement are satisfied (including receipt of an opinion of counsel regarding limited liability and tax status matters), the General Partner may convert the Partnership or any of its subsidiaries into a new limited liability entity or merge the Partnership or any of its subsidiaries into, or convey all of its assets to, a newly formed entity if the sole purpose of that merger or conveyance is to effect a mere change in our legal form into another limited liability entity. The holders of Common Units and the holders of Series A Preferred Units are not entitled to dissenters’ rights of appraisal under the Partnership Agreement or applicable Delaware law in the event of a conversion, merger or consolidation, a sale of substantially all of the Partnership’s assets or any other transaction or event.

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New Summit		The Partnership
Management by Board of Directors/General Partner
In accordance with the DGCL, New Summit’s business and affairs are managed by the New Summit Board. The New Summit Charter provides that, subject to the rights of holders of any Preferred Stock or Blank Check Common Stock, the number of directors will be exclusively fixed from time to time by resolution adopted by the New Summit Board. As of the date of the closing of the Corporate Reorganization, the New Summit Board will have seven directors.		The General Partner conducts, directs and manages all activities of the Partnership. Except as otherwise expressly provided in the Partnership Agreement and the GP LLC Agreement, all management powers over the business and affairs of the Partnership are exclusively vested in the General Partner, and no limited partner has any management power over the business and affairs of the Partnership. Certain actions by the GP Board require approval of the members of the General Partner, as set forth in the GP LLC Agreement.
Nomination and Election of Directors
New Summit’s directors (other than the directors elected by the holders of any series of Preferred Stock or Blank Check Common Stock) will continue to be divided into three classes serving staggered three-year terms. Class I, Class II and Class III directors will serve until the annual meetings of stockholders in 2025, 2026 and 2027, respectively. Directors are elected by the affirmative vote of the holders of a plurality of the shares present or represented by proxy and entitled to vote on the election of directors. At a meeting of the stockholders, only such nominations of persons for the election of directors and such other business may be conducted as has been properly brought before the meeting. To be properly brought before an annual meeting, nominations or such other business must be: (i) specified in New Summit’s notice of meeting, (ii) otherwise properly brought before the meeting by or at the direction of the New Summit Board or (iii) otherwise properly brought before an annual meeting by a stockholder who is a stockholder of record at the time such notice of meeting is given, at the time of the record date of the annual meeting and at the time of the annual meeting, who is entitled to vote at the meeting and who complies with the procedures described under “— Stockholder Proposals and Director Nominations; Proxy Access.” Except as otherwise described above, each director chosen will hold office until the annual meeting of stockholders held after his or her election at which such director’s term expires and will serve until his successor will have been duly elected and qualified or until his earlier death, resignation, retirement, disqualification or removal. Holders of Series A Preferred Stock will have no voting rights with respect to the election of New Summit’s directors.		Pursuant to the Partnership Agreement and the GP LLC Agreement, the Partnership’s unitholders, including the General Partner and its affiliates, are entitled to elect all of the directors of the General Partner. The GP Board is divided into three classes of directors, Class I, Class II and Class III. The number of directors in each class are the whole number contained in the quotient of total directors arrived at by dividing the authorized number of directors by three, and if a fraction is also contained in such quotient, then if such fraction is one-third, the extra director shall be a member of Class I and if the fraction is two-thirds, one of the extra directors shall be a member of Class I and the other shall be a member of Class II. Following the initial term of the directors, each director is elected for a three-year term, with alternating expiration, and thereafter until the earlier of their death, resignation or removal or until their successors have been elected and qualified. Under the Partnership Agreement, nominations of persons for the election of directors may be made at an annual meeting of the unitholders only (i) by or at the direction of the General Partner or the GP Board or (ii) by any limited partner who was a unitholder of record at the time such notice of meeting is given, who is entitled to vote at the meeting and who complies with the procedures described under “— Stockholder Proposals and Director Nominations; Proxy Access.” Holders of Series A Preferred Units have no voting rights with respect to the election of the General Partner or the election of the directors of the General Partner.

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New Summit		The Partnership
Stockholder Proposals and Director Nominations; Proxy Access
The New Summit Bylaws establish advance notice procedures with respect to stockholder proposals for annual meetings and the nomination of candidates for election as directors, other than nominations made by or at the direction of the board of directors or a committee of the board of directors. In order for any matter to be “properly brought” before a meeting, a stockholder will have to comply with advance notice requirements and provide New Summit with certain information. Generally, to be timely, a stockholder’s notice must be received at New Summit’s principal executive offices not later than 90 days nor more than 120 days prior to the first anniversary of the date that New Summit’s proxy statement was released to stockholders for the preceding year’s annual meeting. The New Summit Bylaws also specify requirements as to the form and content of a stockholder’s notice. Pursuant to the various rules promulgated by the SEC, stockholders interested in submitting a proposal to be considered for inclusion in New Summit’s proxy materials and for presentation at the annual meeting may do so by following the procedures set forth in Rule 14a-8 under the Exchange Act. See “Description of New Summit Capital Stock — Anti-Takeover Effects of the Proposed Governing Documents and Certain Provisions of Delaware Law” for additional information regarding notice requirements.		The Partnership Agreement establishes advance notice procedures with respect to unitholder nomination of candidates for election as directors. In order for any such nomination to be made at an annual meeting, a unitholder will have to comply with advance notice requirements and provide the General Partner with certain information. Generally, to be timely, a unitholder’s notice must be given to the General Partner no later than the 90th day, and no earlier than the 120th day, prior to the anniversary of the previous year’s annual meeting. Additionally, only a limited partner, or group of limited partners, that holds or beneficially owns, and has continuously held or beneficially owned without interruption for the prior two years, at least 10% of the outstanding Common Units may nominate a single person for election as a directors. Pursuant to the various rules promulgated by the SEC, stockholders interested in submitting a proposal to be considered for inclusion in New Summit’s proxy materials and for presentation at the annual meeting may do so by following the procedures set forth in Rule 14a-8 under the Exchange Act.
Removal of Directors; Withdrawal or Removal of General Partner
The New Summit Charter will provide that any or all of the directors (other than the directors elected by the holders of any series of Preferred Stock or Blank Check Common Stock) may be removed at any time with or without cause by the affirmative vote of the holders of a majority of the voting power of all of the then-outstanding shares of voting stock, voting together as a single class.		The Partnership Agreement provides that a director may be removed only for cause and only upon a vote of the Unit Majority. Further, a director may only be removed if, at the same meeting, a Unit Majority nominates a replacement director and votes to elect such replacement director. In addition, the General Partner may withdraw as general partner of the Partnership without first obtaining approval of any unitholder by giving 90 days’ advanced written notice of the intent to withdraw. In addition, the Partnership Agreement permits the General Partner in some instances to sell or otherwise transfer all of its general partner interest in the Partnership without the approval of the unitholders. Upon the voluntary withdrawal of the General Partner pursuant to advanced 90-day notice, the holders of a Unit Majority may select a successor to that withdrawing general partner. If a successor is not elected, or is elected but an opinion of counsel regarding limited liability and tax matters cannot be obtained, the Partnership will be dissolved, wound up and liquidated, unless within a specified period after that withdrawal, the holders of a Unit Majority agree in writing to continue the Partnership’s business and to appoint a successor general partner.

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New Summit

The Partnership

The General Partner may be removed if that removal is approved by the vote of the holders of at least 66⅔% of the outstanding Common Units, voting together as a single class, including Common Units held by the General Partner and its affiliates, and the Partnership receives an opinion of counsel regarding limited liability and tax matters. Any removal of the General Partner is also subject to the approval of a successor general partner by the vote of the holders of a majority of the outstanding Common Units. The ownership of more than 33⅓% of the outstanding Common Units by the General Partner and its affiliates would give them the practical ability to prevent the General Partner’s removal. As of May 28, 2024, the General Partner and its affiliates and members of the GP Board and management owned approximately 5.2% of the outstanding Common Units.

The Partnership Agreement also provides that if the General Partner is removed as the general partner of the Partnership under circumstances where cause does not exist or the General Partner withdraws where that withdrawal does not violate the Partnership Agreement, the General Partner will have the option to require a successor general partner to purchase its general partner interest into Common Units or to receive cash in exchange for such interest based on the fair market value of its combined interest at that time.

In the event of removal of such a general partner under circumstances where cause exists or withdrawal of a general partner where that withdrawal violates the Partnership Agreement, a successor general partner will have the option to purchase the general partner interest for a cash payment equal to the fair market value of such interest. In each case, this fair market value will be determined by agreement between the departing general partner and the successor general partner. If no agreement is reached within 30 days after the departing general partner’s departure, an independent investment banking firm or other independent expert selected by the departing general partner and the successor general partner will determine the fair market value. Or, if the departing general partner and the successor general partner cannot agree upon an expert, then an expert chosen by agreement of the experts selected by each of them will determine the fair market value.

If the option described above is not exercised by either the departing general partner or the successor general partner, the departing general partner’s general partner interest will automatically convert into Common Units equal to the fair market value of those interests as determined by an investment banking firm or other independent expert selected in the manner described in the preceding paragraph.

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New Summit		The Partnership
		In addition, the Partnership will be required to reimburse the departing general partner for all amounts due the departing general partner, including, without limitation, all employee-related liabilities, including severance liabilities, incurred for the termination of any employees employed by the departing general partner or its affiliates for the Partnership’s benefit.
Filling Vacancies on the Board; Replacing the General Partner
Subject to the rights granted to the holders of any one or more series of Preferred Stock or Blank Check Common Stock then-outstanding, any vacancies on the New Summit Board, and any newly created directorships, will be filled solely by the affirmative vote of a majority of the directors then in office, even if less than a quorum, or by a sole remaining director.		Any vacancies may be filled, until the next annual meeting at which the term of the directors expires, by a majority of the remaining directors then in office. See also “— Removal of Directors; Withdrawal or Removal of General Partner.”
Change of Management Provisions
See “Description of New Summit Capital Stock — Anti-Takeover Effects of the Proposed Governing Documents and Certain Provisions of Delaware Law.”		The Partnership Agreement contains specific provisions that are intended to discourage a person or group from attempting to remove the General Partner or otherwise change Partnership’s management. If any person or group other than General Partner and its affiliates acquires beneficial ownership of 20% or more of any class or series of Units, that person or group loses voting rights on all of its units and such Units shall not be considered outstanding when sending notices of a meeting of limited partners to vote on any matter (unless otherwise required by law), calculating required votes, determining the presence of a quorum or for other similar purposes under the Partnership Agreement. This loss of voting rights does not apply to any person or group that acquires the Units from the General Partner or its affiliates and any transferees of that person or group approved by the General Partner, to any person or group who acquires the units with the prior approval of the board of directors of the General Partner, or to the voting rights of Series A Preferred Units, if any. See also “— Removal of Directors; Withdrawal or Removal of General Partner.”
Preemptive Rights
None.		No person has any preemptive, preferential or other similar right with respect to the issuance of any Partnership interest, whether unissued, held in the treasury or hereafter created. The General Partner has the right, which it may from time to time assign in whole or in part to any of its affiliates, to purchase Partnership interests from the Partnership whenever, and on the same terms that, the Partnership issues Partnership interests to persons other than the General Partner and its affiliates, to the extent necessary to maintain the percentage interests of the General Partner and its affiliates equal to that which existed immediately prior to the issuance of such Partnership interests.

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New Summit

The Partnership

Amendment of Governing Documents

Under Delaware law, subject to Section 242(b)(2) of the DGCL, which provides holders of a class or series of stock with a separate vote on proposed amendments to the certificate of incorporation under certain circumstances, unless the certificate of incorporation requires a greater vote, an amendment to the certificate of incorporation requires (i) that the board adopt resolutions approving the proposed amendment and declaring its advisability; and (ii) the affirmative vote of the holders of a majority in voting power of the stock entitled to vote.

The Proposed Governing Documents provide that the New Summit Board is expressly authorized to make, repeal, alter, amend and rescind, in whole or in part, the New Summit Bylaws, without the assent or vote of the stockholders in any manner not inconsistent with the laws of the State of Delaware or the New Summit Charter. In addition, New Summit’s stockholders also have the power to make, repeal, alter, amend and rescind, in whole or in part, the New Summit Bylaws, without any requirement to obtain separate approval of the New Summit Board; provided, however, that, in addition to any vote of the holders of any class or series of capital stock of New Summit required in the Proposed Governing Documents or by applicable law, the affirmative vote of the holders of a majority in voting power of all the then-outstanding shares of stock of New Summit entitled to vote thereon, voting together as a single class, is be required in order for the stockholders of New Summit to alter, amend, repeal or rescind, in whole or in part, any provision of the New Summit Bylaws or to adopt any provision inconsistent therewith.

No amendment to the Proposed Governing Documents may be made that would have a material adverse effect on the powers, preferences, relative, participating, optional or other special rights of the Series A Preferred Stock, or the qualifications, limitations and restrictions thereof, without the affirmative vote of the holders of at least 66⅔% of the outstanding Series A Preferred Stock; provided that no amendment in connection with a merger or other transaction in which New Summit is the surviving entity and the Series A Preferred Stock remains outstanding with the terms thereof materially unchanged in any respect adverse to the holders of Series A Preferred Stock is deemed to materially and adversely affect the powers, preferences, duties or special rights of the Series A Preferred Stock.

General. Amendments to the Partnership Agreement may be proposed only by the General Partner. The General Partner, however, will have no duty or obligation to propose or approve any amendment and may decline to do so free of any duty or obligation whatsoever to the Partnership, the limited partners or any other person bound by the Partnership Agreement, including any duty to act in good faith or any other standard imposed by the Partnership Agreement. The General Partner is permitted to determine whether to propose or approve any amendment to the Partnership Agreement in its sole and absolute discretion.

Except as described below, an amendment is effective upon approval by the General Partner and the holders of a Unit Majority, unless a greater or different percentage is required under the Partnership Agreement.

Prohibited Amendments. No amendment to the Partnership Agreement may be made that would:

• establish a smaller percentage, or enlarge the percentage, of outstanding Units required to take any action without its consent, unless such amendment is approved by the holders of outstanding Units whose aggregate outstanding Units constitute (i) in the case of a reduction, not less than the voting requirement sought to be reduced, (ii) in the case of an increase in the percentage required for the removal of the General Partner, not less than 90% of the outstanding Units, or (iii) in the case of an increase in the percentage relating to director nominations and elections, not less than a majority of the outstanding Units;

• enlarge the obligations of any limited partner without its consent;

• enlarge the obligations of, restrict in any way any action by or rights of, or reduce in any way the amounts distributable, reimbursable or otherwise payable to the General Partner or any of its affiliates without the consent of the General Partner, which consent may be given or withheld at its option;

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New Summit

The Partnership

• have a material adverse effect on the powers, preferences, duties or special rights of the Series A Preferred Units without the affirmative vote of the holders of at least 66⅔% of the outstanding Series A Preferred Units; provided that no amendment in connection with a merger or other transaction in which the Partnership is the surviving entity and the Series A Preferred Units remain outstanding with the terms thereof materially unchanged in any respect adverse to the holders of Series A Preferred Units is deemed to materially and adversely affect the powers, preferences, duties or special rights of the Series A Preferred Units;

• have a material adverse effect on the rights or preferences of any class of Partnership interests in relation to other classes of Partnership interests must be approved by the holders of not less than a majority of the outstanding Partnership interests of the class affected; or

• amend the requirements to amend the Partnership Agreement without the approval of the holders of at least 90% of the outstanding Units.

None of the foregoing amendments shall become effective without the approval of the holders of at least 90% of the outstanding Units voting as a single class unless the Partnership obtains an opinion of counsel to the effect that such amendment will not affect the limited liability of any limited partner under applicable partnership law of the state under whose laws the Partnership is organized.

As of May 28, 2024, the General Partner and its affiliates and members of the GP Board and management owned approximately 5.2% of the outstanding Common Units and 0% of the outstanding Series A Preferred Units.

No Unitholder Approval. The General Partner may generally make amendments to the Partnership Agreement without the approval of any limited partner to reflect:

• a change in the Partnership’s name, the location of the Partnership’s principal place of business, the Partnership’s registered agent or the Partnership’s registered office;

• the admission, substitution, withdrawal or removal of partners in accordance with the Partnership Agreement;

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New Summit

The Partnership

• a change that the General Partner determines to be necessary or appropriate to qualify or continue the Partnership’s qualification as a limited partnership or a partnership in which the limited partners have limited liability under the laws of any state or to ensure that neither the Partnership nor any of its subsidiaries will be treated as associations taxable as corporations or otherwise taxed as entities for federal income tax purposes;

• an amendment that is necessary, in the opinion of the Partnership’s counsel, to prevent the Partnership or the General Partner or its directors, officers, trustees or agents from in any manner being subjected to the provisions of the Investment Company Act of 1940, as amended, the Investment Advisors Act of 1940, as amended, or “plan asset” regulations adopted under the Employee Retirement Income Security Act of 1974, whether or not substantially similar to plan asset regulations currently applied or proposed by the U.S. Department of Labor;

• an amendment that the General Partner determines to be necessary or appropriate in connection with the authorization or issuance of any class or series of Partnership interests;

• any amendment expressly permitted in the Partnership Agreement to be made by the General Partner acting alone;

• an amendment effected, necessitated or contemplated by a merger agreement or plan of conversion that has been approved under the terms of the Partnership Agreement;

• an amendment that the General Partner determines to be necessary or appropriate to reflect and account for the formation by the Partnership of, or the Partnership’s investment in, any corporation, partnership, joint venture, limited liability company or other entity, in connection with the conduct by the Partnership of activities permitted by the Partnership Agreement;

• certain mergers or conveyances as set forth in the Partnership Agreement; or

• any other amendments substantially similar to any of the matters described in the clauses above.

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New Summit		The Partnership
		Opinion of Counsel. The General Partner will not be required to obtain an opinion of counsel that an amendment will not result in a loss of limited liability to the limited partners or result in the Partnership’s being treated as an association taxable as a corporation or otherwise taxable as an entity for federal income tax purposes in connection with any of the amendments described under “— No Unitholder Approval.” No other amendments to the Partnership Agreement other than described above under “No Unitholder Approval” will become effective without the approval of holders of at least 90% of the outstanding Units voting as a single class unless the Partnership first obtains an opinion of counsel to the effect that the amendment will not affect the limited liability under applicable law of any of the Partnership’s limited partners.
Voting Rights; Meetings; Action by Written Consent
The New Summit Charter provides that holders of shares of Common Stock are entitled to one vote for each share held of record on all matters on which stockholders generally are entitled to vote. Holders of Series A Preferred Stock will be entitled to one vote per share of Series A Preferred Stock on matters such holders are entitled to vote. Unless otherwise required by law, the New Summit Charter or the rules of any stock exchange applicable to New Summit, the record holders of a majority of the voting power of the outstanding shares present in person or represented by proxy at the meeting and entitled to vote thereat will constitute a quorum for the transaction of business at all meetings of stockholders. With respect to matters as to which no other voting requirement is specified by applicable law or regulation, the rules or regulations of any stock exchange applicable to New Summit, or the Proposed Governance Documents, the vote required for stockholder action is a majority of the votes properly cast on the matter. Directors are elected by a plurality of the votes cast in respect of the shares present in person or represented by proxy at the meeting and entitled to vote on the election of directors. The holders of a series of Preferred Stock or Blank Check Common Stock, if any, are entitled only to such voting rights, if any, as are expressly granted to such series of Preferred Stock or Blank Check Common Stock by the New Summit Charter (including any certificate of designation relating to such series of Preferred Stock or Blank Check Common Stock). Holders of Series A Preferred Stock will have no voting rights except for limited voting rights with respect to potential amendments to the Proposed Governing Documents that have a material adverse effect on the existing terms of the Series A Preferred Stock and in certain other limited circumstances or as required by law.		Except as described below regarding a person or group owning 20% or more of any class or series of Units then outstanding, unitholders who are record holders of units on the record date will be entitled to notice of, and to vote at, meetings of the limited partners and to act upon matters for which approvals may be solicited. The unitholders, including the General Partner and its affiliates, are entitled to elect all of the directors of the General Partner. The GP LLC Agreement and the Partnership Agreement provide for a board of directors to be comprised of not less than five and not more than eight individuals. The Partnership Agreement provides that the annual meeting of limited partners for the directors of the board shall be held on such date and at such time as may be fixed from time to time by the General Partner at such place as may be fixed from time to time by the General Partner and all as stated in the notice of such meeting. Additionally, any action that is required or permitted to be taken by the limited partners may be taken either at a meeting of the limited partners or without a meeting if consents in writing describing the action so taken are signed by holders of the number of outstanding limited partner interests necessary to authorize or take that action at a meeting. Meetings of the limited partners may be called by the General Partner or by limited partners owning at least 20% of the outstanding limited partner interests of the class or series for which a meeting is proposed. Limited partners may vote either in person or by proxy at meetings. The holders of a majority of the outstanding limited partner interests of the class or classes or series for which a meeting has been called represented in person or by proxy will constitute a quorum unless any such action requires approval by holders of a greater percentage of the outstanding limited partner interests, in which case the quorum will be the greater percentage.

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New Summit		The Partnership
If any person or group acquires beneficial ownership of 20% or more of any class or series of capital stock of New Summit, that person or group loses voting rights on all of its shares of Series A Preferred Stock and such shares of Series A Preferred Stock shall not be considered outstanding when sending notices of a meeting of holders of Series A Preferred Stock to vote on any matter (unless otherwise required by law), calculating required votes, determining the presence of a quorum or for other similar purposes under the Proposed Governing Documents. This loss of voting rights does not apply to any person or group that acquires the capital stock from affiliates of New Summit (including capital stock received pursuant to the Merger Agreement in exchange for Units acquired by such person or group from the General Partner or its affiliates) and any transferees of that person or group approved by New Summit (or, as applicable, the General Partner), to any person or group who acquires the capital stock with the prior approval of the New Summit Board (including capital stock received pursuant to the Merger Agreement in exchange for Units acquired with the prior approval of the GP Board), or to the voting rights of Series A Preferred Stock pursuant to the Certificate of Designation. The New Summit Charter provides that special meetings of stockholders may be called only by or at the direction of the New Summit Board, the Chairman thereof or the Chief Executive Officer. The New Summit Charter provides that any action required or permitted to be taken by the stockholders must be taken at a duly called annual or special meeting of stockholders and may not be taken by any consent in writing of such stockholders.		Each record holder of a unit has a vote according to his percentage interest in the Partnership, although additional limited partner interests having special voting rights could be issued. Holders of Series A Preferred Units shall be entitled to one vote per Series A Preferred Unit. However, if any person or group other than General Partner and its affiliates acquires beneficial ownership of 20% or more of any class or series of Units, that person or group loses voting rights on all of its units and such Units shall not be considered outstanding when sending notices of a meeting of limited partners to vote on any matter (unless otherwise required by law), calculating required votes, determining the presence of a quorum or for other similar purposes under the Partnership Agreement. This loss of voting rights does not apply to any person or group that acquires the Units from the General Partner or its affiliates and any transferees of that person or group approved by the General Partner, to any person or group who acquires the units with the prior approval of the GP Board, or to the voting rights of Series A Preferred Units pursuant to the Partnership Agreement. Units held in nominee or street name account will be voted by the broker or other nominee in accordance with the instruction of the beneficial owner unless the arrangement between the beneficial owner and his nominee provides otherwise. Any notice, demand, request, report or proxy material required or permitted to be given or made to record holders of units under the Partnership Agreement will be delivered to the record holder by the Partnership or by the transfer agent.
Indemnification and Limitation on Liability
The DGCL authorizes corporations to limit or eliminate the personal liability of directors and officers to corporations and their stockholders for monetary damages for breaches of directors’ fiduciary duties. The DGCL does not permit exculpation for liability: • for any breach of a director’s or officer’s duty of loyalty to New Summit or to its stockholders; • for acts or omissions not in good faith or that involve intentional misconduct or a knowing violation of law; • for unlawful payment of dividends or unlawful stock repurchases or redemptions; • for any transaction from which a director or officer derived an improper personal benefit; and • for any action against an officer by or in right of New Summit.		Under the Partnership Agreement, the Partnership will indemnify and hold harmless the following persons, to the fullest extent permitted by law (subject to certain limitations in the Partnership Agreement), from and against any and all losses, claims, damages, liabilities, joint or several, expenses (including legal fees and expenses), judgments, fines, penalties, interest, settlements or other amounts arising from any and all threatened, pending or completed claims, demands, actions, suits or proceedings, whether civil, criminal, administrative or investigative, and whether formal or informal and including appeals, in which such person may be involved, or is threatened to be involved, as a party or otherwise, by reason of its status and acting (or refraining to act) in such capacity on behalf of or for the benefit of the Partnership: • the General Partner; • any departing general partner; • any person who is or was an affiliate of the General Partner or any departing general partner;

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New Summit		The Partnership
The New Summit Charter eliminates the personal liability of directors and officers for monetary damages for actions taken as a director or officer to the fullest extent permitted by the DGCL. The New Summit Charter provides that, to the fullest extent permitted by the DGCL, New Summit will indemnify any person made or threatened to be made a party to or is otherwise involved in (including as a witness) an action or proceeding, whether criminal, civil, administrative, or investigative, by reason of the fact that he or she is or was a director or officer of New Summit or any predecessor of New Summit appointed or elected by the New Summit Board, or, while serving as a director or officer of New Summit elected or appointed by the New Summit Board, serves or served at another corporation, partnership, joint venture, trust or other enterprise as a director or officer at the request of New Summit or any predecessor to New Summit. The New Summit Bylaws provide that it will indemnify and advance expenses to its directors and officers, and may indemnify and advance expenses to its employees and agents, to the fullest extent permitted by the DGCL. The New Summit Bylaws expressly authorize New Summit to maintain insurance providing indemnification for its directors, officers, employees, agents and other persons against any expense, liability or loss, whether or not New Summit would have the power to indemnify such person against such expense, liability or loss under the DGCL.		• any person who is or was a manager, managing member, general partner, director, officer, fiduciary or trustee of the Partnership or any of its subsidiaries, the General Partner or any departing general partner or any affiliate of the foregoing; • any person who is or was serving at the request of the General Partner or any departing general partner or any affiliate of the General Partner or any departing general partner as a manager, managing member, general partner, director, officer, fiduciary or trustee of another person owing a fiduciary duty to the Partnership or any of its subsidiaries; and • any person designated by the General Partner. Any indemnification under these provisions will only be out of the Partnership’s assets. The General Partner shall not be personally liable for such indemnification and shall have no obligation to contribute or loan any monies or property to the Partnership to enable it to effectuate such indemnification. The Partnership may purchase and maintain insurance, on behalf of the General Partner, its affiliates and such other persons as the General Partner shall determine, against any liability that may be asserted against, or expense that may be incurred by, such person in connection with the Partnership’s activities or such person’s activities on behalf of the Partnership, regardless of whether the Partnership would have the power to indemnify such person against such liability under the provisions of the Partnership Agreement.
Conflicts of Interest; Fiduciary Duties; Corporate Opportunities
Under the DGCL, a transaction or a contract between a corporation and an officer or director is not void or voidable solely because of the officer’s or director’s interest if: • the material facts are disclosed or made known to the board of directors (or committee thereof) and a majority of the disinterested directors vote to authorize the transaction in good faith; • the material facts are disclosed or made known to the stockholders entitled to vote thereon and the transaction is specifically approved in good faith by vote of the stockholders; or • the transaction is fair to the corporation at the time it is authorized, approved or ratified by the board of directors (or committee thereof) or the stockholders.		The General Partner (i) agrees that its sole business will be to act as a general partner or managing member, as the case may be, of the Partnership and any other partnership or limited liability company of which the Partnership is, directly or indirectly, a partner or member and to undertake activities that are ancillary or related thereto (including being a limited partner in the Partnership) and (ii) shall not engage in any business or activity or incur any debts or liabilities except in connection with or incidental to (a) its performance as general partner or managing member, if any, of one or more of the Partnership or its subsidiaries or as described in or contemplated by the IPO Registration Statement (as defined in the Partnership Agreement), (b) the acquiring, owning or disposing of debt securities or equity interests in the Partnership or any of its subsidiaries or (c) subject to the limitations contained in the Operation and Services Agreement (as defined in the Partnership Agreement), the performance of its obligations under the Operation and Services Agreement.

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New Summit

The Partnership

Other than the General Partner, each indemnitee, partner, person who is or was a member, partner, director, officer, employee or agent of the Partnership or any of its subsidiaries, any departing general partner or any affiliate of the Partnership or any of its subsidiaries and any person the General Partner designates (collectively, such persons “Unrestricted Persons”) will have the right to engage in businesses of every type and description and other activities for profit and to engage in and possess an interest in other business ventures of any and every type or description, whether in businesses engaged in or anticipated to be engaged in by the Partnership or any of its subsidiaries, independently or with others, including business interests and activities in direct competition with the business and activities of the Partnership or any of its subsidiaries, and none of the same will constitute a breach of the Partnership Agreement or any duty otherwise existing at law, in equity or otherwise, to the Partnership or any of its subsidiaries or any partner.

Engaging in competitive activities by any Unrestricted Person is approved by the Partnership and all its partners. It is not a breach of any duty or any other obligation of any type whatsoever of the General Partner or any other Unrestricted Person for the Unrestricted Persons to engage in such business interests and activities in preference to or to the exclusion of the Partnership. Unrestricted Persons have no obligation under the Partnership Agreement or as a result of any duty otherwise existing at law, in equity or otherwise, to present business opportunities to the Partnership. The doctrine of corporate opportunity, or any analogous doctrine, will not apply to any Unrestricted Person. No Unrestricted Person who acquires knowledge of a potential transaction, agreement, arrangement or other matter that may be an opportunity for the Partnership, will have any duty to communicate or offer such opportunity to the Partnership, and such Unrestricted Person will not be liable to the Partnership or to any limited partner for breach of any duty by reason of the fact that such Unrestricted Person (including the General Partner) pursues or acquires for itself, directs such opportunity to another person or does not communicate such opportunity or information to the Partnership; provided that such Unrestricted Person does not engage in such business or activity using confidential or proprietary information provided by or on behalf of the Partnership to such Unrestricted Person.

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New Summit		The Partnership
Exclusive Forum
The New Summit Charter provides that, unless New Summit consents in writing to the selection of an alternative forum, the Court of Chancery of the State of Delaware (or, if and only if the Court of Chancery of the State of Delaware lacks requisite subject matter jurisdiction, any state court located within the State of Delaware or, if and only if all such state courts lack subject matter jurisdiction, the federal district court for the District of Delaware) and any appellate court therefrom shall be the exclusive forum for (i) any derivative action or proceeding brought on behalf of the New Summit, (ii) any action asserting a claim of breach of a fiduciary duty owed by any current or former director, officer, other employee or stockholder of New Summit to New Summit or New Summit’s stockholders, (iii) any action asserting a claim arising pursuant to any provision of the DGCL or the Proposed Governing Documents or as to which the DGCL confers jurisdiction on the Court of Chancery of the State of Delaware, or (iv) any action asserting a claim governed by the internal affairs doctrine. Further, unless New Summit consents in writing to the selection of an alternative forum, the federal district courts of the United States shall be the exclusive forum for the resolution of any complaint asserting a cause of action arising under the Securities Act against New Summit or any director, officer, employee or agent of New Summit. Any person purchasing or otherwise acquiring or holding an interest in any shares of New Summit capital stock shall be deemed to have notice of and to have consented to the forum provisions in the New Summit Charter. It is possible that a court could find New Summit’s exclusive forum provision to be inapplicable or unenforceable.		The Partnership Agreement provides that the Court of Chancery of the State of Delaware shall be the exclusive forum for any claims, suits, actions or proceedings (i) arising out of or relating in any way to the Partnership Agreement, (ii) brought in a derivative manner on behalf of the Partnership, (iii) asserting a claim of breach of a duty owed by any director, officer, or other employee of the Partnership or the General Partner, or owed by the General Partner, to the Partnership or the partners, (iv) asserting a claim arising pursuant to any provision of the Delaware LP Act or (v) asserting a claim governed by the internal affairs doctrine.
Taxation
New Summit is classified as a corporation for U.S. federal income tax purposes and is subject to U.S. federal income tax on its taxable income. See “Material U.S. Federal Income Tax Consequences.”		The Partnership is classified as a partnership for U.S. federal income tax purposes and, generally, is not subject to entity-level U.S. federal income taxes. Each unitholder receives a Schedule K-1 from the Partnership reflecting such unitholder’s share of the Partnership’s items of income, gain, loss and deduction for each taxable year following the end of such taxable year.

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DESCRIPTION OF NEW SUMMIT CAPITAL STOCK

General

The following description of New Summit’s Common Stock, Preferred Stock and Blank Check Common Stock, the New Summit Charter, the New Summit Bylaws and the Series A Certificate of Designation is a summary only and reflects the Proposed Governing Documents that will be in effect upon consummation of the Corporate Reorganization, forms of which are included as exhibits to the Merger Agreement, a copy of which is attached as Annex A to this proxy statement/prospectus. Immediately following the Corporate Reorganization, New Summit’s authorized capital stock will consist of 42,000,000 shares of Common Stock, 500,000 shares of Preferred Stock and 30,000,000 shares of Blank Check Common Stock. Immediately upon consummation of the Corporate Reorganization, the New Summit Board will designate 65,508 shares of the Preferred Stock as Series A Preferred Stock.

Common Stock

Holders of shares of the Common Stock are entitled to one vote for each share held of record on all matters on which stockholders are entitled to vote generally, including the election or removal of directors elected by New Summit’s stockholders generally. The holders of the Common Stock do not have cumulative voting rights in the election of directors.

Holders of shares of the Common Stock are entitled to receive dividends when, as and if declared by the New Summit Board out of funds legally available therefor, subject to any statutory or contractual restrictions on the payment of dividends and to any restrictions on the payment of dividends imposed by the terms of any outstanding Preferred Stock or Blank Check Common Stock.

Upon New Summit’s liquidation, dissolution or winding up and after payment in full of all amounts required to be paid to creditors and to the holders of Preferred Stock and Blank Check Common Stock having liquidation preferences, if any, the holders of shares of the Common Stock will be entitled to receive pro rata New Summit’s remaining assets available for distribution.

All shares of the Common Stock that will be outstanding upon consummation of the Corporate Reorganization will be fully paid and non-assessable. The Common Stock will not be subject to further calls or assessments by New Summit. Holders of shares of the Common Stock will not have preemptive, subscription, redemption or conversion rights. There will be no redemption or sinking fund provisions applicable to the Common Stock. The rights powers, preferences and privileges of the Common Stock will be subject to those of the holders of any shares of Preferred Stock or Blank Check Common Stock or any other series or class of stock that New Summit may authorize and issue in the future.

Preferred Stock

Other than the Series A Preferred Stock described below, no shares of Preferred Stock will be issued or outstanding immediately upon consummation of the Corporate Reorganization. The New Summit Charter authorizes the New Summit Board to establish one or more series of Preferred Stock (including convertible Preferred Stock). Unless required by law or any stock exchange, the authorized shares of Preferred Stock will be available for issuance without further action by the holders of the Common Stock or the Blank Check Common Stock. The New Summit Board is able to determine, with respect to any series of Preferred Stock, the powers (including voting powers), preferences and relative, participating, optional or other special rights, and the qualifications, limitations or restrictions thereof, including, without limitation:

• the designation of the series;

• the number of shares of the series, which the New Summit Board may, except where otherwise provided in the Preferred Stock designation, increase (but not above the total number of authorized shares of the class) or decrease (but not below the number of shares then outstanding);

• whether dividends, if any, will be cumulative or non-cumulative and the dividend rate of the series;

• the dates at which dividends, if any, will be payable;

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• the redemption or repurchase rights and price or prices, if any, for shares of the series;

• the terms and amounts of any sinking fund provided for the purchase or redemption of shares of the series;

• the amounts payable on shares of the series in the event of any voluntary or involuntary liquidation, dissolution or winding-up of New Summit’s affairs;

• whether the shares of the series will be convertible into shares of any other class or series, or any other security, of New Summit or any other entity, and, if so, the specification of the other class or series or other security, the conversion price or prices or rate or rates, any rate adjustments, the date or dates as of which the shares will be convertible and all other terms and conditions upon which the conversion may be made;

• restrictions on the issuance of shares of the same series or of any other class or series; and

• the voting rights, if any, of the holders of the series.

Series A Preferred Stock

Shares of Series A Preferred Stock represent perpetual equity interests in New Summit, and they have no stated maturity or mandatory redemption date. Holders of Series A Preferred Stock generally have no voting rights, except for limited voting rights in certain circumstances.

The holders of Series A Preferred Stock are entitled to receive, when, as and if declared by the New Summit Board out of legally available funds for such purpose, cumulative and compounding quarterly cash dividends. Dividends on the shares of Series A Preferred Stock are cumulative and compounding and are payable quarterly in arrears on the 15th days of March, June, September and December of each year. The dividend rate for the Series A Preferred Stock is a percentage of the Series A Liquidation Preference equal to the three-month SOFR, or, if no such rate is so published, a substitute or successor rate determined by the calculation agent, plus a spread of 7.69%.

The shares of Series A Preferred Stock will have a liquidation preference of $1,000. Upon the occurrence of certain rating agency events, New Summit may redeem the shares of Series A Preferred Stock, in whole but not in part, at a price of 102% of the Series A Liquidation Preference per share of Series A Preferred Stock plus an amount equal to all accumulated and unpaid dividends thereon to, but not including, the date fixed for redemption, whether or not declared. In addition, at any time on or after December 15, 2023, New Summit may, at its option, redeem the Series A Preferred Stock, in whole or in part, at a redemption price of 102% of the Series A Liquidation Preference for the year 2023 or 100% of the Series A Liquidation Preference for the years 2024 and thereafter per share of Series A Preferred Stock plus an amount equal to all accumulated and unpaid dividends thereon to, but not including, the date of redemption, whether or not declared (assuming such shares of Series A Preferred Stock are redeemed during the 12-month period beginning on the years indicated).

If certain change of control triggering events occur, each holder of the Series A Preferred Stock may require New Summit to repurchase all or a portion of such holder’s Series A Preferred Stock at a purchase price equal to 101% of the Series A Liquidation Preference per share of Series A Preferred Stock plus an amount equal to all accumulated and unpaid dividends thereon to, but not including, the date of settlement. Any such redemption would be effected only out of funds legally available for such purposes and will be subject to compliance with the provisions of New Summit’s outstanding indebtedness.

Blank Check Common Stock

No shares of Blank Check Common Stock will be issued or outstanding immediately upon consummation of the Corporate Reorganization. The New Summit Charter authorizes the New Summit Board to establish one or more series of Blank Check Common Stock (including convertible Blank Check Common Stock). Unless required by law or any stock exchange, the authorized shares of Blank Check Common Stock will be available for issuance without further action by the holders of the Common Stock or the Preferred Stock. The New Summit Board is able

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to determine, with respect to any series of Blank Check Common Stock, the powers (including voting powers), preferences and relative, participating, optional or other special rights, and the qualifications, limitations or restrictions thereof, including, without limitation:

• the designation of the series;

• the number of shares of the series, which the New Summit Board may, except where otherwise provided in the Blank Check Common Stock designation, increase (but not above the total number of authorized shares of the class) or decrease (but not below the number of shares then outstanding);

• whether dividends, if any, will be cumulative or non-cumulative and the dividend rate of the series;

• the dates at which dividends, if any, will be payable;

• the redemption or repurchase rights and price or prices, if any, for shares of the series;

• the terms and amounts of any sinking fund provided for the purchase or redemption of shares of the series;

• the amounts payable on shares of the series in the event of any voluntary or involuntary liquidation, dissolution or winding-up of New Summit’s affairs;

• restrictions on the issuance of shares of the same series or of any other class or series; and

• the voting rights, if any, of the holders of the series.

Dividends

The DGCL permits a corporation to declare and pay dividends out of “surplus” or, if there is no “surplus,” out of its net profits for the fiscal year in which the dividend is declared and/or the preceding fiscal year. “Surplus” is defined as the excess of the net assets of the corporation over the amount determined to be the capital of the corporation by its board of directors. The capital of the corporation is typically calculated to be (and cannot be less than) the aggregate par value of all issued shares of capital stock. Net assets equals the fair value of the total assets minus total liabilities. The DGCL also provides that dividends may not be paid out of net profits if, after the payment of the dividend, remaining capital would be less than the capital represented by the outstanding stock of all classes having a preference upon the distribution of assets. Declaration and payment of any dividend will be subject to the discretion of the New Summit Board.

New Summit has no current plans to pay dividends on the Common Stock. Any decision to declare and pay dividends in the future will be made at the sole discretion of the New Summit Board and will depend on, among other things, New Summit’s results of operations, cash requirements, financial condition, contractual restrictions and other factors that the New Summit Board may deem relevant. Because New Summit will be a holding company following the Corporate Reorganization and will have no direct operations, New Summit will only be able to pay dividends from funds it receives from its subsidiaries. In addition, New Summit’s ability to pay dividends will be limited by covenants in its existing indebtedness and may be limited by the agreements governing other indebtedness that New Summit or its subsidiaries incur in the future.

Until the redemption of the Series A Preferred Stock, holders of the shares of Series A Preferred Stock are entitled to receive cumulative compounding dividends quarterly. In any quarter, the holders of shares of Series A Preferred Stock must receive the dividend to which they are entitled for that quarter, plus any accrued and unpaid dividends from prior quarters, and the New Summit Board must expect to have sufficient funds to pay the next dividend on the Series A Preferred Stock, before any distributions can be paid on the Common Stock. New Summit cannot pay dividends on any junior securities, including the Common Stock, prior to paying the dividends payable on the Series A Preferred Stock.

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Annual Stockholder Meetings

The New Summit Bylaws provide that annual stockholder meetings will be held at a date, time and place, if any, as exclusively selected by the New Summit Board. To the extent permitted under applicable law, New Summit may conduct meetings by remote communications, including by webcast.

Anti-Takeover Effects of the Proposed Governing Documents and Certain Provisions of Delaware Law

Some provisions of Delaware law, the New Summit Charter and the New Summit Bylaws could make certain change of control transactions more difficult, including acquisitions of New Summit by means of a tender offer, a proxy contest or otherwise, as well as removal of New Summit’s incumbent officers and directors. These provisions may also have the effect of preventing changes in New Summit’s management. It is possible that these provisions could make it more difficult to accomplish or could deter transactions that stockholders may otherwise consider to be in their best interest or in New Summit’s best interests, including transactions that might result in a premium over the market price for New Summit’s shares. Therefore, these provisions could adversely affect the price of the Common Stock or the Series A Preferred Stock.

These provisions, summarized below, are intended to discourage coercive takeover practices and inadequate takeover bids. These provisions are also designed to encourage persons seeking to acquire control of New Summit to first negotiate with the New Summit Board. New Summit believes that the benefits of increased protection and New Summit’s potential ability to negotiate with the proponent of an unsolicited proposal to acquire or restructure New Summit outweigh the disadvantages of discouraging these proposals because, among other things, negotiation of these proposals could result in an improvement of their terms.

Proposed Governing Documents

Among other things, the Proposed Governing Documents:

• establish advance notice procedures with regard to stockholder proposals relating to the nomination of candidates for election as directors or new business to be brought before meetings of New Summit’s stockholders. These procedures provide that notice of stockholder proposals must be timely delivered to New Summit’s corporate secretary prior to the meeting at which the action is to be taken. Generally, to be timely, notice must be delivered to our corporate secretary not less than 90 days nor more than 120 days prior to the first anniversary of the date of New Summit’s proxy statement released to the stockholders for the preceding year’s annual meeting. The New Summit Bylaws specify the requirements as to form and content of all stockholders’ notices. These requirements may deter stockholders from bringing matters before the stockholders at an annual or special meeting;

• authorize the New Summit Board to issue undesignated Preferred Stock and undesignated Blank Check Common Stock. This ability makes it possible for the New Summit Board to issue, without stockholder approval, Preferred Stock or Blank Check Common Stock with voting or other rights or preferences that could impede the success of any attempt to change control of New Summit. These and other provisions may have the effect of deferring hostile takeovers or delaying changes in control or management of New Summit;

• provide that the authorized number of directors may be changed only by resolution of the New Summit Board;

• provide that all vacancies, including newly created directorships, may, except as otherwise required by law or, if applicable, the rights of holders of a series of Preferred Stock or Blank Check Common Stock, be filled by the affirmative vote of a majority of the total number of directors then in office, even if less than a quorum;

• provide that any action required or permitted to be taken by the stockholders must be effected at a duly called annual or special meeting of stockholders and may not be effected by any consent in writing in lieu of a meeting of such stockholders, subject to the rights of the holders of any series of Preferred Stock or Blank Check Common Stock with respect to such series;

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• provide that special meetings of New Summit’s stockholders may only be called by resolution of the board of directors;

• provide that the New Summit Board be divided into three classes of directors, serving staggered three-year terms, other than directors which may be elected by holders of Preferred Stock or Blank Check Common Stock, if any. This system of electing and removing directors may tend to discourage a third party from making a tender offer or otherwise attempting to obtain control of New Summit because it generally makes it more difficult for stockholders to replace a majority of the directors; and

• provide that the approval of the holders of at least two-thirds of the then outstanding Series A Preferred Stock is required on any matter (including a merger, consolidation or business combination) that would materially adversely affect any of the existing preferences, rights, powers, duties or obligations of the Series A Preferred Stock.

Forum Selection

The New Summit Charter provides that unless New Summit consents in writing to the selection of an alternative forum, the Court of Chancery of the State of Delaware (or, if and only if the Court of Chancery of the State of Delaware lacks requisite subject matter jurisdiction, and state court located within the State of Delaware or, if and only if all such state courts lack subject matter jurisdiction, the federal district court for the District of Delaware) and any appellate court therefrom will, to the fullest extent permitted by applicable law, be the sole and exclusive forum for:

• any derivative action or proceeding brought on New Summit’s behalf;

• any action asserting a claim of breach of a fiduciary duty owed by any of New Summit’s current or former directors, officers, other employees or stockholders to New Summit or New Summit’s stockholders;

• any action asserting a claim arising pursuant to any provision of the DGCL or the Proposed Governing Documents or as to which the DGCL confers jurisdiction on the Court of Chancery of the State of Delaware; or

• any action asserting a claim against New Summit or any director or officer or other employee of New Summit’s that is governed by the internal affairs doctrine, in each such case subject to such Court of Chancery having personal jurisdiction over the indispensable parties named as defendants therein.

Notwithstanding the foregoing sentence, the federal district courts of the United States of America shall be the exclusive forum for the resolution of any complaint asserting a cause of action arising under the Securities Act against New Summit or any director, officer, employee or agent of New Summit.

The New Summit Charter also provides that any person or entity purchasing or otherwise acquiring or holding any interest in shares of New Summit’s capital stock will be deemed to have notice of, and to have consented to, these forum selection provisions. Although New Summit believes these provisions benefit New Summit by providing increased consistency in the application of Delaware law for the specified types of actions and proceedings, the provisions may have the effect of discouraging lawsuits against New Summit’s directors, officers, employees and agents. The enforceability of similar exclusive forum provisions in other companies’ certificates of incorporation has been challenged in legal proceedings, and it is possible that, in connection with one or more actions or proceedings described above, a court could rule that this provision in the New Summit Charter is inapplicable or unenforceable.

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Opt Out of Section 203 of the DGCL

In the New Summit Charter, New Summit elects not to be subject to the provisions of Section 203 of the DGCL regulating corporate takeovers. In general, those provisions prohibit a Delaware corporation, including those whose securities are listed for trading on the NYSE, from engaging in any business combination with any interested stockholder for a period of three years following the date that the stockholder became an interested stockholder, unless:

• the transaction is approved by the board of directors before the date the interested stockholder attained that status;

• upon consummation of the transaction that resulted in the stockholder becoming an interested stockholder, the interested stockholder owned at least 85% of the voting stock of the corporation outstanding at the time the transaction commenced; or

• on or after the date the interested stockholder attained that status, the business combination is approved by the board of directors and authorized at a meeting of stockholders by at least two-thirds of the outstanding voting stock that is not owned by the interested stockholder.

Dissenters’ Rights of Appraisal and Payment

Under the DGCL, with certain exceptions, New Summit’s stockholders will have appraisal rights in connection with a merger or consolidation of New Summit. Pursuant to the DGCL, stockholders entitled to seek appraisal who properly assert and perfect appraisal rights in accordance with Section 262 of the DGCL in connection with such merger or consolidation will have the right to receive payment of the fair value of their shares as determined by the Court of Chancery of the State of Delaware.

Stockholders’ Derivative Actions

Under the DGCL, any of New Summit’s stockholders may bring an action in the company’s name to procure a judgment in its favor, also known as a derivative action, provided that the stockholder bringing the action is a holder of New Summit’s shares at the time of the transaction to which the action relates or such stockholder’s stock thereafter devolved upon such stockholder by operation of law.

Limitations on Liability and Indemnification and Advancement of Expenses of Officers and Directors

The DGCL authorizes corporations to limit or eliminate the personal liability of directors and officers to corporations and their stockholders for monetary damages for breaches of directors’ and officers’ fiduciary duties, subject to certain exceptions. The Proposed Governing Documents provide that New Summit will indemnify and advance expenses to its directors and officers, and may indemnify and advance expenses to its employees and other agents, to the fullest extent permitted by the DGCL, which prohibits the New Summit Charter from limiting the liability of its directors and officers for the following:

• any breach of the director’s or officer’s duty of loyalty to New Summit or to its stockholders;

• acts or omissions not in good faith or that involve intentional misconduct or a knowing violation of law;

• unlawful payment of dividends or unlawful stock repurchases or redemptions;

• any transaction from which the director or officer derived an improper personal benefit; and

• any action against the officer by or in right of New Summit.

If the DGCL is amended to authorize corporate action further eliminating or limiting the personal liability of a director or officer, then the liability of New Summit’s directors and officers will be eliminated or limited to the fullest extent permitted by the DGCL, as so amended.

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The New Summit Bylaws generally provide that it must indemnify and advance expenses to its directors and officers to the fullest extent authorized by the DGCL. New Summit also is expressly authorized to carry directors’ and officers’ liability insurance providing indemnification for its directors, officers and certain employees for some liabilities. In addition, New Summit may also enter into indemnification agreements with its directors and officers in the future. New Summit believes that these indemnification and advancement provisions and insurance are useful to attract and retain qualified directors and executive officers.

The limitation of liability, indemnification and advancement provisions in the Proposed Governing Documents may discourage stockholders from bringing a lawsuit against directors for breach of their fiduciary duty. These provisions also may have the effect of reducing the likelihood of derivative litigation against directors and officers, even though such an action, if successful, might otherwise benefit New Summit and its stockholders. In addition, your investment may be adversely affected to the extent New Summit pays the costs of settlement and damage awards against directors and officers pursuant to these indemnification provisions. Insofar as indemnification for liabilities arising under the Securities Act may be permitted to our directors and officers pursuant to the foregoing provisions, or otherwise, New Summit has been advised that, in the opinion of the SEC, such indemnification is against public policy as expressed in the Securities Act, and is, therefore, unenforceable.

There is currently no pending material litigation or proceeding involving any of New Summit’s directors, officers or employees for which indemnification or advancement of expenses is sought.

Transfer Agent and Registrar

The transfer agent and registrar for the Common Stock and the Series A Preferred Stock will be Equiniti Trust Company, LLC.

Listing

It is a condition to the consummation of the Merger that the Common Stock issuable in the Merger be approved for listing on a national securities exchange, subject to official notice of issuance. The Common Stock is expected to trade on NYSE under the symbol “SMC.” We do not intend to apply for the listing of the Series A Preferred Stock on any securities exchange.

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UNAUDITED PRO FORMA CONDENSED CONSOLIDATED FINANCIAL INFORMATION

The following sets forth unaudited pro forma condensed consolidated financial information for New Summit after giving effect to the Partnership’s historical financial position and operating results of (i) the Mountaineer Divestiture, (ii) the Utica Divestiture and (iii) the Corporate Reorganization.

The accompanying unaudited pro forma condensed consolidated balance sheet as of March 31, 2024 has been prepared to reflect the Mountaineer Divestiture and Corporate Reorganization as if they had occurred on March 31, 2024. The unaudited pro forma condensed consolidated statements of operations for the three months ended March 31, 2024 and for the year ended December 31, 2023 have been prepared as if the (i) Mountaineer Divestiture, (ii) Utica Divestiture and (iii) Corporate Reorganization had occurred on January 1, 2023.

The unaudited pro forma condensed consolidated balance sheet and statements of operations included herein are for information purposes only and are not necessarily indicative of the results that might have occurred had the (i) Mountaineer Divestiture, (ii) Utica Divestiture and (iii) Corporate Reorganization taken place on the respective dates assumed. Actual results may differ significantly from those reflected in the unaudited pro forma condensed consolidated financial statements for various reasons, including but not limited to, the differences between the assumptions used to prepare the unaudited pro forma condensed consolidated financial statements and actual results. The pro forma adjustments in the unaudited pro forma condensed consolidated balance sheet and the statements of operations included herein include the use of estimates and assumptions as described in the accompanying notes. The pro forma adjustments are based on information available to the Partnership at the time these unaudited pro forma condensed consolidated financial statements were prepared. The Partnership believes its current estimates provide a reasonable basis of presenting the significant effects of the divestitures and Corporate Reorganization. However, the estimates and assumptions are subject to change as additional information becomes available. The unaudited pro forma condensed consolidated financial statements include only those adjustments related to the divestitures and Corporate Reorganization.

The unaudited pro forma condensed consolidated financial statements are based on the historical consolidated financial statements of the Partnership and should be read in conjunction with the Interim Financial Statements and the Annual Financial Statements.

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SUMMIT MIDSTREAM PARTNERS, LP AND SUBSIDIARIES
PRO FORMA CONDENSED CONSOLIDATED BALANCE SHEET (UNAUDITED)
As of March 31, 2024

(In thousands, except unit amounts)	Historical		Divestiture Pro forma Adjustments				Corporate Reorganization Proforma Adjustments				Pro forma Combined
ASSETS
Cash and cash equivalents	$	344,590	$	(141,939	)	(a) (b)	$	—			$	202,651
Restricted cash		3,454		—				—				3,454
Accounts receivable		66,587		(6,005	)	(b)		—				60,582
Other current assets		5,935		(100	)	(b)		—				5,835
Total current assets		420,566		(148,044	)			—				272,522
Property, plant and equipment, net		1,447,443		(64,910	)	(b)		—				1,382,533
Intangible assets, net		147,304		(9,016	)	(b)		—				138,288
Investment in equity method investees		273,476		—				—				273,476
Other noncurrent assets		31,786		(375	)	(b)		—				31,411
TOTAL ASSETS	$	2,320,575	$	(222,345	)		$	—			$	2,098,230

LIABILITIES AND CAPITAL
Trade accounts payable	$	18,063	$	3,026		(b) (c)	$	1,750		(f)	$	22,839
Accrued expenses		36,554		(670	)	(b)		—				35,884
Deferred revenue		8,899		—				—				8,899
Ad valorem taxes payable		3,282		(853	)	(b)		—				2,429
Accrued compensation and employee benefits		2,824		(51	)	(b)		—				2,773
Accrued interest		44,826		(9,009	)	(d)		—				35,817
Accrued environmental remediation		1,854		—				—				1,854
Accrued settlement payable		6,667		—				—				6,667
Current portion of long-term debt		29,098		—				—				29,098
Other current liabilities		7,476		—				—				7,476
Total current liabilities		159,543		(7,557	)			1,750				153,736
Long-term debt, net		1,127,287		(206,844	)	(a)		—				920,443
Noncurrent deferred revenue		28,761		—				—				28,761
Deferred tax liability		—		—				158,352		(g)		158,352
Noncurrent accrued environmental remediation		1,278		—				—				1,278
Other noncurrent liabilities		28,298		—				—				28,298
Total liabilities		1,345,167		(214,401	)			160,102				1,290,868
Commitments and contingencies

Mezzanine Capital
Subsidiary Series A Preferred Units		126,794		—				—				126,794

Partners’ Capital
Series A Preferred Units		100,113		—				—				100,113
Common limited partner capital		748,501		(7,944	)	(b) (e)		(160,102	)	(g)		580,455
Total partners’ capital		848,614		(7,944	)			(160,102	)			680,568
TOTAL LIABILITIES AND CAPITAL	$	2,320,575	$	(222,345	)		$	—			$	2,098,230

The accompanying notes are an integral part of these unaudited pro forma condensed
consolidated financial statements.

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SUMMIT MIDSTREAM PARTNERS, LP AND SUBSIDIARIES
PRO FORMA CONDENSED CONSOLIDATED STATEMENT OF OPERATIONS (UNAUDITED)
For the Three Months Ended March 31, 2024

(In thousands, except per-unit amounts)	Historical			Divestiture Pro forma Adjustments				Corporate Reorganization Proforma Adjustments			Pro forma Combined
Revenues:
Gathering services and related fees	$	61,985		$	(16,853	)	(h)	$	—		$	45,132
Natural gas, NGLs and condensate sales		49,092			—				—			49,092
Other revenues		7,794			—				—			7,794
Total revenues		118,871			(16,853	)			—			102,018
Costs and expenses:
Cost of natural gas and NGLs		30,182			—				—			30,182
Operation and maintenance		25,012			(1,893	)	(h)		—			23,119
General and administrative		14,785			(200	)	(h)		—			14,585
Depreciation and amortization		27,867			(4,248	)	(h)		—			23,619
Transaction costs		7,791			—				—			7,791
Acquisition integration costs		40			—				—			40
Gain on asset sales, net		(27	)		—				—			(27	)
Long-lived asset impairments		67,916			(67,916	)	(m)		—			—
Total costs and expenses		173,566			(74,257	)			—			99,309
Other income, net		(13	)		1,789		(j)		—			1,776
Gain on interest rate swaps		2,590			—				—			2,590
Gain (loss) on sale of business		86,202			(86,202	)	(l)		—			—
Gain on sale of equity method investment		126,261			(126,261	)	(l)		—			—
Interest expense		(37,846	)		13,160		(i)		—			(24,686	)
Income (loss) before income taxes and equity method investment income		122,499			(140,110	)			—			(17,611	)
Income tax expense		(210	)		—				2,996	(n)		2,786
Income from equity method investees		10,638			(7,039	)	(h)		—			3,599
Net income (loss)	$	132,927		$	(147,149	)		$	2,996		$	(11,226	)
Less: Net income attributable to Subsidiary Series A Preferred Units		(3,770	)		—				—			(3,770	)
Net income (loss) attributable to Summit Midstream Partners, LP	$	129,157		$	(147,149	)		$	2,996		$	(14,996	)
Less: net income attributable to Series A Preferred Units		(3,220	)		—				—			(3,220	)
Net income (loss) attributable to common limited partners	$	125,937		$	(147,149	)		$	2,996		$	(18,216	)
Net income (loss) per limited partner unit:
Common unit – basic	$	12.05									$	(1.74	)
Common unit – diluted	$	11.47									$	(1.74	)

Weighted-average limited partner units outstanding:
Common units – basic		10,449										10,449
Common units – diluted		10,980										10,449

The accompanying notes are an integral part of these unaudited pro forma condensed
consolidated financial statements.

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SUMMIT MIDSTREAM PARTNERS, LP AND SUBSIDIARIES
PRO FORMA CONDENSED CONSOLIDATED STATEMENT OF OPERATIONS (UNAUDITED)
For the Year Ended December 31, 2023

(In thousands, except per-unit amounts)	Historical			Divestiture Pro forma Adjustments				Corporate Reorganization Proforma Adjustments				Pro forma Combined
Revenues:
Gathering services and related fees	$	248,223		$	(63,805	)	(h)	$	—			$	184,418
Natural gas, NGLs and condensate sales		179,254			—				—				179,254
Other revenues		31,426			—				—				31,426
Total revenues		458,903			(63,805	)			—				395,098
Costs and expenses:
Cost of natural gas and NGLs		112,462			—				—				112,462
Operation and maintenance		100,741			(8,860	)	(h)		—				91,881
General and administrative		42,135			(868	)	(h)		—				41,267
Depreciation and amortization		122,764			(17,855	)	(h)		—				104,909
Transaction costs		1,251			1,000		(k)		1,750		(k)		4,001
Acquisition integration costs		2,654			—				—				2,654
Gain on asset sales, net		(260	)		7		(h)		—				(253	)
Long-lived asset impairments		540			67,916		(m)		—				68,456
Total costs and expenses		382,287			41,340				1,750				425,377
Other income, net		865			4,979		(j)		—				5,844
Gain on interest rate swaps		1,830			—				—				1,830
Gain (loss) on sale of business		(47	)		86,202		(l)		—				86,155
Gain on sale of equity method investment		—			126,261		(l)		—				126,261
Interest expense		(140,784	)		46,071		(i)		—				(94,713	)
Loss on early extinguishment of debt		(10,934	)		—				—				(10,934	)
Income (loss) before income taxes and equity method investment income		(72,454	)		158,368				(1,750	)			84,164
Income tax expense		(322	)		—				(162,437	)	(n)		(162,759	)
Income from equity method investees		33,829			(22,922	)	(h)		—				10,907
Net income (loss)	$	(38,947	)	$	135,446			$	(164,187	)		$	(67,688	)
Less: Net income attributable to Subsidiary Series A Preferred Units		(12,581	)		—				—				(12,581	)
Net income (loss) attributable to Summit Midstream Partners, LP	$	(51,528	)	$	135,446			$	(164,187	)		$	(80,269	)
Less: net income attributable to Series A Preferred Units		(11,566	)		—				—				(11,566	)
Net income (loss) attributable to common limited partners	$	(63,094	)	$	135,446			$	(164,187	)		$	(91,835	)
Net income (loss) per limited partner unit:
Common unit – basic	$	(6.11	)									$	(8.89	)
Common unit – diluted	$	(6.11	)									$	(8.89	)

Weighted-average limited partner units outstanding:
Common units – basic		10,334											10,334
Common units – diluted		10,334											10,334

The accompanying notes are an integral part of these unaudited pro forma condensed
consolidated financial statements.

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SUMMIT MIDSTREAM PARTNERS, LP AND SUBSIDIARIES
NOTES TO PRO FORMA CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Unaudited)

1. BASIS OF PRESENTATION

The March 31, 2024 unaudited pro forma condensed consolidated balance sheet gives effect to the pro forma adjustments necessary to reflect the Mountaineer Divestiture and Corporate Reorganization as if they had occurred on March 31, 2024. The unaudited pro forma condensed consolidated statement of operations gives effect to the pro forma adjustments necessary to reflect (i) the Mountaineer Divestiture, (ii) the Utica Divestiture and (iii) the Corporate Reorganization as if they had occurred on January 1, 2023. The unaudited pro forma adjustments are based on available information and assumptions that management believes are (i) directly attributable to the Mountaineer Divestiture, Utica Divestiture and Corporate Reorganization and (ii) factually supportable.

2. PRO FORMA ADJUSTMENTS

The unaudited pro forma condensed consolidated statements reflect the following adjustments:

Balance Sheet

“Historical” — represents the historical unaudited consolidated balance sheet of the Partnership as of March 31, 2024. Upon completion of the Merger, the Partnership’s common limited partner capital account will be eliminated and replaced with common shares, paid in capital, and retained earnings. Additionally, the Series A Preferred Units will be exchanged for an equivalent number of shares of Series A Preferred Stock, with no substantive changes in contractual terms or investor cash flows.

(a) To adjust Partnership balance sheet accounts for cash proceeds received associated with the Mountaineer Divestiture, the sale of compression assets and the 2026 Unsecured Notes Redemption.

(b) To remove the Partnership’s assets and liabilities associated with the Mountaineer Divestiture. The following is a summarization of the application of net proceeds and estimated loss on the Mountaineer Divestiture and sale of compression equipment.

(in thousands)
Sale price	$	74,400
Cash on hand		(55	)
Accounts receivable		(6,005	)
Other current assets		(100	)
Property, plant and equipment, net		(64,910	)
Intangible assets		(9,016	)
Other noncurrent assets		(375	)
Trade accounts payable, accrued expenses and other current liabilities		643

(c) To adjust for $1.0 million of unrecognized transaction costs associated with the Mountaineer Divestiture, primarily for investment bank, advisory and legal fees.

(d) To remove the accrued interest of the 2026 Unsecured Notes in connection with their full redemption.

(e) To adjust for the estimated loss to be recognized by the Partnership related to the Mountaineer Divestiture.

(f) To adjust for $1.75 million of unrecognized transaction costs associated with the Merger, primarily for investment bank, advisory and legal fees.

(g) To recognize a deferred tax liability of $159.4 million related to the Merger and calculated using the current federal tax rate of 21% plus an appropriate state tax rate. The deferred tax liability is primarily the result of differences between GAAP and tax values of the Partnership’s fixed assets as of the date of the Merger and other basis adjustments resulting from the conversion of the Partnership to a taxable entity.

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Upon completion of the Merger, the Partnership’s common limited partner capital account will be eliminated and replaced with common shares, paid in capital, and retained earnings. Additionally, the Series A Preferred Units will be exchanged for an equivalent number of shares of Series A Preferred Stock, with no substantive changes in contractual terms or investor cash flows.

Income Statement

“Historical” — represents the historical audited statement of operations of the Partnership for the three months ended March 31, 2024 and for the year ended December 31, 2023. Upon completion of the Merger, the Partnership’s common limited partner capital account will be eliminated and replaced with common shares, paid in capital, and retained earnings. Additionally, the Series A Preferred Units will be exchanged for an equivalent number of shares of Series A Preferred Stock, with no substantive changes in contractual terms or investor cash flows.

(h) Adjustments are to eliminate revenues and costs of Summit Utica and Mountaineer Midstream from the Partnership’s consolidated financial results.

(i) To adjust interest expense for the impact of an estimated $313.0 million pay down of the Partnership’s asset-based revolving credit facility and $209.5 million redemption of the 2026 Unsecured Notes with proceeds received from the Utica Divestiture, partially offset by increased interest expense resulting from an increase in commitment fees owed on the asset-based revolving credit facility.

(j) To adjust for the estimated interest income associated with the proceeds received from the Mountaineer Divestiture and Utica Divestiture.

(k) To adjust for unrecognized transaction costs associated with the Mountaineer Divestiture, Utica Divestiture and the Merger, primarily for investment bank, advisory and legal fees.

(l) To adjust the gain recognized as a result of the Utica Divestiture as if the transaction had occurred on January 1, 2023.

(m) To adjust impairment associated with the Mountaineer Divestiture as if the transaction had occurred on January 1, 2023.

(n) The pro forma financial results for the year ended December 31, 2023 include a deferred tax expense for the establishment of a deferred tax liability as a result of the Merger resulting from differences between the GAAP and tax values of the Partnership’s fixed assets as of the date of the Merger and other basis adjustments resulting from the conversion of the Partnership to a taxable entity. The pro forma financial results for the three months ended March 31, 2024 include a deferred tax expense primarily related to differences between GAAP and tax depreciation expense for the three month operating period.

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MATERIAL U.S. FEDERAL INCOME TAX CONSEQUENCES

The following is a discussion of certain material U.S. federal income tax consequences to U.S. holders (as defined below) of the Merger and of owning and disposing of Common Stock received in the Merger and is the opinion of Kirkland & Ellis LLP, counsel to New Summit, insofar as it relates to legal conclusions with respect to matters of U.S. federal income tax law. This discussion is based upon current provisions of the Internal Revenue Code of 1986, as amended (the “Code”), existing and proposed Treasury regulations (the “Treasury Regulations”) promulgated under the Code and judicial authority and administrative interpretations, all as of the date of this document, and all of which are subject to change, possibly with retroactive effect, and are subject to differing interpretations. Changes in these authorities may cause the tax consequences to vary substantially from the consequences described below. No ruling has been or is expected to be sought from the IRS with respect to any of the tax consequences discussed below. As a result, there can be no assurance that the IRS will not assert, or that a court would not sustain, a position contrary to any of the conclusions set forth below.

This discussion is limited to U.S. holders that hold their Common Units, and will hold their Common Stock received in the Merger, as “capital assets” within the meaning of Section 1221 of the Code (generally, property held for investment). This discussion does not address any tax consequences arising under the Medicare tax on net investment income or the alternative minimum tax, nor does it address any tax consequences arising under the laws of any state, local or non-U.S. jurisdiction, under any tax treaty, or under any U.S. federal laws other than those pertaining to income taxes. Furthermore, this discussion does not address all aspects of U.S. federal income taxation that may be applicable to U.S. holders in light of their particular circumstances or to U.S. holders that may be subject to special rules under U.S. federal income tax laws, including, without limitation:

• a bank, insurance company or other financial institution;

• a tax-exempt or governmental organization;

• a real estate investment trust;

• an S corporation or an entity treated as a partnership for U.S. federal income tax purposes and any holder of an interest therein;

• a regulated investment company or a mutual fund;

• a “controlled foreign corporation” or a “passive foreign investment company”;

• a dealer or broker in stocks and securities, or currencies;

• a trader in securities that elects mark-to-market treatment;

• a holder of Common Units that received such Common Units through the exercise of an employee option, pursuant to a retirement plan or otherwise as compensation;

• a person whose functional currency is not the U.S. dollar;

• a holder who holds Common Units through non-U.S. brokers or other non-U.S. intermediaries;

• a holder that holds Common Units or Common Stock as part of a hedge, straddle, appreciated financial position, conversion or other “synthetic security” or integrated investment or risk reduction transaction;

• a person who purchases or sells Common Units or Common Stock as part of a wash sale for tax purposes;

• accrual method U.S. holders that prepare an “applicable financial statement” (as defined in Section 451 of the Code); or

• a U.S. expatriate.

If a partnership, or any entity treated as a partnership for U.S. federal income tax purposes, holds Common Units or Common Stock the tax treatment of a partner in such partnership generally will depend on the status of the partner and the activities of the partnership and upon certain determinations made at the partner level. A partner in a partnership holding Common Units should consult its own tax advisor about the U.S. federal income tax consequences of the Merger and of such partnership owning and disposing of Common Stock received in the Merger.

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Furthermore, this discussion is limited to U.S. holders that hold only Common Units and do not beneficially own any Series A Preferred Units. It therefore assumes that U.S. holders do not own any Series A Preferred Units in addition to Common Units and does not address any tax consequences of owning Series A Preferred Units, exchanging Series A Preferred Units in the Merger, or of owning and disposing of Series A Preferred Stock received in the Merger. The tax consequences to a U.S. holder that is a beneficial owner of Series A Preferred Units are complex, and such U.S. holder is strongly urged to consult its own tax advisor with respect to the specific tax consequences of exchanging Series A Preferred Units for Series A Preferred Stock in the Merger and of owning and disposing of Series A Preferred Stock received in the Merger.

Each unitholder that is not a U.S. holder is strongly urged to consult with and rely upon its own tax advisor with respect to the tax consequences of the Merger and of receiving, owning and disposing of stock received in the Merger.

For purposes of this discussion, “U.S. holder” is a beneficial owner of Common Units or Common Stock that is for U.S. federal income tax purposes:

• an individual citizen or resident of the United States;

• a corporation (or any other entity taxable as a corporation for U.S. federal income tax purposes) created or organized in or under the laws of the United States, any state thereof or the District of Columbia;

• an estate, whose income is subject to U.S. federal income tax regardless of its source; or

• a trust (i) the administration of which is subject to the primary supervision of a U.S. court and that has one or more United States persons that have the authority to control all substantial decisions of the trust or (ii) that has made a valid election under applicable U.S. Treasury Regulations to be treated as a United States person.

All statements as to matters of U.S. federal income tax law and legal conclusions with respect thereto, but not as to factual matters, contained in this discussion are the opinion of Kirkland & Ellis LLP and are based on the accuracy of the representations made by New Summit and the Partnership.

THIS DISCUSSION IS PROVIDED FOR GENERAL INFORMATION ONLY AND IS NOT A COMPLETE ANALYSIS OR DESCRIPTION OF ALL POTENTIAL U.S. FEDERAL INCOME TAX CONSEQUENCES OF THE MERGER OR THE RECEIPT, OWNERSHIP AND DISPOSITION OF STOCK RECEIVED IN THE MERGER. EACH UNITHOLDER IS STRONGLY URGED TO CONSULT WITH AND RELY UPON ITS OWN TAX ADVISOR AS TO THE SPECIFIC FEDERAL, STATE, LOCAL AND NON-U.S. TAX CONSEQUENCES TO SUCH UNITHOLDER OF THE MERGER AND THE RECEIPT, OWNERSHIP AND DISPOSITION OF STOCK RECEIVED IN THE MERGER, TAKING INTO ACCOUNT ITS OWN PARTICULAR CIRCUMSTANCES.

Tax Consequences of the Merger

Tax Characterization of the Merger. The Merger should qualify as an exchange described in Section 351 of the Code with respect to U.S. holders, with the resulting consequences described below, if the unitholders are in control (within the meaning of Section 368(c) of the Code) of New Summit immediately after the Merger. “Control” for purposes of Section 351 is defined as the ownership of stock possessing at least 80 percent of the total combined voting power of all classes of stock entitled to vote and at least 80 percent of the total number of shares of all other classes of stock of the corporation. Unitholders will receive control of New Summit pursuant to the Merger. However, if the unitholders or New Summit take steps that would cause such unitholders to lose “control” of New Summit immediately after the Merger as interpreted by applicable case law and IRS guidance, the Merger would not satisfy the requirements of Section 351 of the Code, in which case the Merger would be a taxable transaction to U.S. holders, and any gain realized by a U.S. holder would be recognized.

Accordingly, it is generally intended that U.S. holders would not recognize gain or loss in the Merger, subject to the discussion below regarding the application of Section 357(c) of the Code.

Even if, as generally intended, the Merger qualifies as a transaction described in Section 351 of the Code, if a corporation assumes (or, is treated for U.S. federal income tax purposes as having assumed) liabilities of the transferor (or accepts property subject to liabilities) in an exchange described in Section 351 of the Code, the

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transferor generally must recognize gain under Section 357(c) of the Code in the amount by which the aggregate liabilities exceed the transferor’s basis in the property contributed to the corporation. Partnership liabilities are allocated to the U.S. holders under Section 752 of the Code, and as a result of the Merger, such liabilities will be treated as having been assumed by New Summit and will be subject to Section 357(c) of the Code. Accordingly, a U.S. holder will recognize gain as a result of the Merger to the extent that the aggregate amount of Partnership liabilities allocable to such U.S. holder immediately prior to the Merger exceeds the U.S. holder’s aggregate tax basis in the Common Units exchanged by such U.S. holder.

Each U.S. holder’s aggregate tax basis in the shares of Common Stock received in the Merger will generally be the same as the U.S. holder’s aggregate tax basis in the Common Units surrendered in exchange therefor (as discussed below), increased by the amount of any gain recognized in the Merger, including any gain recognized under Section 357(c) (as discussed above), and reduced by the aggregate amount of Partnership liabilities allocable to such U.S. holder immediately prior to the Merger.

A U.S. holder’s initial tax basis in Common Units purchased with cash would generally equal, at the time of such purchase, the amount such U.S. holder paid for the Common Units plus the U.S. holder’s share of the Partnership’s liabilities allocable to such U.S. holder. Over time that basis would have been (i) increased by the U.S. holder’s share of the Partnership’s income; by any increases in the aggregate amount of Partnership liabilities allocable to such U.S. holder; and immediately prior to the Merger, by the U.S. holder’s share of the Partnership’s business interest expenses that were not deductible by the U.S. holder in prior taxable periods because they exceeded the U.S. holder’s share of excess taxable income or excess business interest income, and (ii) decreased, but not below zero, by distributions from the Partnership (other than distributions treated as guaranteed payments); by the U.S. holder’s share of the Partnership’s losses; by any decreases in the aggregate amount of Partnership liabilities allocable to such U.S. holder; and by the U.S. holder’s share of the Partnership’s expenditures that are not deductible in computing taxable income and are not required to be capitalized.

The holding period of Common Stock received by a U.S. holder in exchange for Common Units will generally include the holding period of the Common Units for which it is exchanged, however, the IRS has previously taken the position that to the extent the Common Stock is received by such U.S. holder in exchange for interests in Section 751 assets of the Partnership that are neither capital assets nor Section 1231 assets, the holding period of such Common Stock begins on the day following the date of the Merger. Each U.S. holder is strongly urged to consult its own tax advisor with respect to the holding period of Common Stock received in the Merger.

Reporting Requirements. U.S. holders that receive shares representing at least 5% of the total combined voting power or value of the total outstanding Common Stock are required to attach to their U.S. federal income tax returns for the year in which the Merger is completed, and maintain a permanent record of, a statement containing the information listed in Treasury Regulations Section 1.351-3. The facts to be disclosed by such U.S. holder include the aggregate fair market value of, and the U.S. holder’s basis in, the Common Units exchanged by such U.S. holder in the Merger.

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The Partnership Items of Income, Gain, Loss and Deduction for the Taxable Period Ending on the Date of the Merger. A U.S. holder will be allocated its share of the Partnership’s items of income, gain, loss and deduction for the taxable period of the Partnership ending on the date of the Merger. These allocations will be made in accordance with the terms of the Partnership Agreement. A U.S. holder will be subject to U.S. federal income taxes on any such allocated income and gain even if such U.S. holder does not receive a cash distribution from the Partnership. Any such items allocated to a U.S. holder will increase or decrease the U.S. holder’s tax basis in the Common Units, as discussed above, and, therefore, will increase or decrease such U.S. holder’s basis in the Common Stock received in the Merger or the amount of any gain recognized in the Merger.

Tax Consequences of the Ownership and Disposition of Common Stock

Distributions on Shares. For U.S. federal income tax purposes, distributions of cash by New Summit to a U.S. holder with respect to shares received in the Merger will generally be included in a U.S. holder’s income as dividend income to the extent of New Summit’s current or accumulated “earnings and profits,” as determined under U.S. federal income tax principles, and will be reported to such owner on Form 1099-DIV. A portion of the cash distributed to the stockholders by New Summit after the Merger may exceed New Summit’s current and accumulated earnings and profits. Distributions of cash in excess of New Summit’s current and accumulated earnings and profits will be treated as a non-taxable return of capital reducing a U.S. holder’s adjusted tax basis in such U.S. holder’s shares and, to the extent the distribution exceeds such U.S. holder’s adjusted tax basis, as capital gain from the sale or exchange of such shares. Dividends received by a corporate U.S. holder may be eligible for a dividends received deduction, subject to applicable limitations. Dividends received by an individual U.S. holder may be taxed at the lower applicable long-term capital gains rate if such dividends are treated as “qualified dividend income” for U.S. federal income tax purposes.

Sale, Exchange, Certain Redemptions or Other Taxable Dispositions of Shares. Upon the sale, exchange, certain redemptions or other taxable dispositions of New Summit shares received in the Merger, a U.S. holder will generally recognize capital gain or loss equal to the difference between (i) the amount of cash and the fair market value of any other property received upon such taxable disposition of shares and (ii) the U.S. holder’s adjusted tax basis in such shares. Such capital gain or loss will be long-term capital gain or loss if the U.S. holder’s holding period in the shares disposed of is more than twelve months at the time of such taxable disposition. Long-term capital gains of non-corporate taxpayers are generally taxed at reduced rates. The deductibility of capital losses is subject to limitations.

The U.S. federal income tax consequences of owning and disposing of Common Stock or Series A Preferred Stock are complex and will depend on a stockholder’s own tax situation. Accordingly, each stockholder is strongly urged to consult its own tax advisor with respect to the specific tax consequences of owning and disposing of Common Stock or Series A Preferred Stock, taking into account its own particular circumstances.

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MANAGEMENT’S DISCUSSION AND ANALYSIS OF
FINANCIAL CONDITION AND RESULTS OF OPERATIONS OF THE PARTNERSHIP

The following discussion and analysis should be read in conjunction with the “Selected Historical Consolidated Financial Data of the Partnership” and the accompanying audited and unaudited financial statements and related notes included elsewhere in this proxy statement/prospectus. The following discussion contains forward-looking statements that reflect future plans, estimates, beliefs and expected performance of the Partnership and New Summit. The forward-looking statements are dependent upon events, risks and uncertainties that may be outside of the control of the Partnership and New Summit. The actual results of the Partnership and New Summit could differ materially from those discussed in these forward-looking statements. Factors that could cause or contribute to such differences include, but are not limited to, those discussed in “Cautionary Statement Regarding Forward-Looking Statements,” as well as those factors discussed below and elsewhere in this proxy statement/prospectus, particularly in “Risk Factors,” all of which are difficult to predict. In light of these risks, uncertainties and assumptions, actual results may differ materially from those anticipated or implied in the forward-looking statements. Unless the context provides otherwise, when used in this “Management’s Discussion and Analysis of Financial Condition and Results of Operations of the Partnership,” references to “we,” “us” and “our” or like terms refer to the Partnership, prior to the consummation of the Corporate Reorganization.

Overview

We are a value-driven limited partnership focused on developing, owning and operating midstream energy infrastructure assets that are strategically located in unconventional resource basins, primarily shale formations, in the continental United States.

Our financial results are driven primarily by volume throughput across our gathering systems and by expense management. We generate the majority of our revenues from the gathering, compression, treating and processing services that we provide to our customers. A majority of the volumes that we gather, compress, treat and/or process have a fixed-fee rate structure which enhances the stability of our cash flows by providing a revenue stream that is not subject to direct commodity price risk. We also earn a portion of our revenues from the following activities that directly expose us to fluctuations in commodity prices: (i) the sale of physical natural gas and/or NGLs purchased under percentage-of-proceeds or other processing arrangements with certain of our customers in the Rockies and Piceance segments, (ii) the sale of natural gas we retain from certain Barnett segment customers, (iii) the sale of condensate we retain from our gathering services in the Rockies and Piceance segment and (iv) additional gathering fees that are tied to the performance of certain commodity price indexes which are then added to the fixed gathering rates. During the year ended December 31, 2023, these additional activities accounted for approximately 39% of our total revenues.

We also have indirect exposure to changes in commodity prices such that persistently low commodity prices may cause our customers to delay and/or cancel drilling and/or completion activities or temporarily shut-in production, which would reduce the volumes of natural gas and crude oil (and associated volumes of produced water) that we gather. If certain of our customers cancel or delay drilling and/or completion activities or temporarily shut-in production, the associated MVCs, if any, ensure that we will earn a minimum amount of revenue.

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The following tables present certain consolidated and reportable segment financial data. For additional information on our reportable segments, see the “Segment Overview for the Three Months Ended March 31, 2024 and 2023” and “Segment Overview for the Years Ended December 31, 2023 and 2022” sections herein.

	Three Months Ended March 31,
	2024			2023
	(in thousands)
Net income (loss)	$	132,927		$	(14,163	)
Reportable segment adjusted EBITDA
Northeast	$	29,021		$	17,854
Rockies		22,874			23,130
Permian		7,265			5,073
Piceance		15,233			13,983
Barnett		5,100			7,027
Net cash provided by operating activities	$	43,616		$	49,695
Capital expenditures(1)		16,398			16,438
Proceeds from sale of business		292,266			—
Proceeds from sale of equity method investment		332,734			—
Investment in Double E equity method investee		—			3,500
Repayments on ABL Facility		(313,000	)		(13,000	)
Repayments on Permian Transmission Term Loan		(3,794	)		(2,519	)

____________

(1) See “Liquidity and Capital Resources” herein for additional information on capital expenditures.

	Year Ended December 31,
	2023			2022
	(in thousands)
Net loss	$	(38,947	)	$	(123,461	)
Reportable segment adjusted EBITDA
Northeast	$	94,249		$	77,046
Rockies		87,390			57,810
Permian		24,207			18,051
Piceance		59,749			60,055
Barnett		26,171			31,624
Net cash provided by operating activities	$	126,906		$	98,744
Capital expenditures(1)		68,905			30,472
Cash consideration paid for the acquisition of Outrigger DJ, net of cash acquired		—			(166,631	)
Cash consideration paid for the acquisition of Sterling DJ, net of cash acquired		—			(139,896	)
Proceeds from the disposition of the Lane G&P System, net of cash sold in the transaction		—			75,020
Proceeds from the disposition of Bison Midstream, net of cash sold in the transaction		—			38,920
Investment in Double E equity method investee		3,500			8,444
Net cash provided by (used in) financing activities
Borrowings on 2026 Unsecured Notes		29,480			—
Repurchase of 2025 Senior Notes		(29,650	)		—
Borrowings on ABL Facility		70,000			293,000
Repayments on ABL Facility		(87,000	)		(230,000	)
Repayments on Permian Transmission Term Loan		(10,507	)		(4,647	)
Borrowings on 2026 Secured Notes		—			84,371

____________

(1) See “Liquidity and Capital Resources” herein and Note 17 to the Annual Financial Statements for additional information on capital expenditures.

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Trends and Outlook

Our business has been, and we expect our future business to continue to be, affected by the following key trends:

• Ongoing impact of political and economic conditions and events in foreign oil and natural gas producing countries on commodity prices, including the continued conflict in the Middle East, the current Russia-Ukraine conflict, the international sanctions against Russia and other sustained military campaigns;

• Natural gas, NGL and crude oil supply and demand dynamics;

• Actions of OPEC and its allies, including the ability and willingness of the members of OPEC and other exporting nations to agree to and maintain oil price and production controls;

• Production from U.S. shale plays;

• Capital markets availability and cost of capital; and

• Inflation and shifts in operating costs.

Our expectations are based on assumptions made by us and information currently available to us. To the extent our underlying assumptions about, or interpretations of, available information prove to be incorrect, our actual results may vary materially from our expected results.

Potential Transaction

The Partnership has had and continues to have discussions with unaffiliated third-parties with respect to potential strategic transactions. These discussions include Potential Transactions in which the counterparties would acquire control of the Partnership or, after the Corporate Reorganization, New Summit.

Summit Utica Divestiture

As previously announced on March 22, 2024, we completed the Utica Divestiture for a cash sale price of $625.0 million, subject to customary post-closing adjustments. Summit Utica is the owner of (i) approximately 36% of the issued and outstanding equity interests in OGC, (ii) approximately 38% of the issued and outstanding equity interests in OCC and (iii) midstream assets located in the Utica Shale. Ohio Gathering is the owner of a natural gas gathering system and condensate stabilization facility located in Belmont and Monroe counties in the Utica Shale in southeastern Ohio.

Mountaineer Midstream Divestiture

On May 1, 2024, we completed the Mountaineer Divestiture for a cash sale price of $70 million, subject to customary post-closing adjustments. Mountaineer Midstream is the owner of midstream assets located in the Marcellus Shale. Prior to closing the Mountaineer Divestiture, we sold related compression assets located in the Marcellus Shale to a compression service provider for approximately $5 million in April 2024.

Conclusion of Strategic Alternatives Review

In connection with the announcement of the Utica Divestiture, we also announced the conclusion of the strategic alternative review process undertaken by the GP Board that was previously announced on October 3, 2023. While we have concluded our active process, we remain open to all potential value-enhancing transactions.

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Capital structure optimization and portfolio management

We intend to continue to improve our capital structure in the future by reducing our indebtedness with free cash flow, and when appropriate, we may pursue opportunistic transactions with the objective of increasing long term unitholder value. This may include opportunistic acquisitions, divestitures (such as the Utica Divestiture in 2024), re-allocation of capital to new or existing areas, and development of joint ventures involving our existing midstream assets or new investment opportunities. We believe that our current cash balance, internally generated cash flow, our ABL Facility, the Permian Transmission Credit Facilities, and access to debt or equity will be adequate to finance our strategic initiatives. To attain our overall corporate strategic objectives, we may conduct an asset divestiture, or divestitures, at a transaction valuation that is less than the net book value of the divested asset.

Ongoing impact of political and economic conditions and events in foreign oil and natural gas producing countries on commodity prices

Although we operate solely in the United States, certain events and conditions in foreign oil and natural gas producing countries, such as the continued conflict in the Middle East, including the Hamas-Israel war and Russia’s invasion of Ukraine, could have potential effects on us, including, but not limited to, volatility in currencies and commodity prices, higher inflation, cost and supply chain pressures and availability and disruptions in banking systems and capital markets. As of the date of this proxy statement/prospectus, there have been no material impacts to us.

Based on recently updated production forecasts and 2024 development plans from our customers, we currently expect that 2024 activity will be higher than 2023 and be at an activity level near our historical periods prior to COVID-19.

Impact of increases in interest rates

Increases in interest rates could adversely affect our future ability to obtain financing or materially increase the cost of existing and any additional financing. Since March 2022, the Federal Reserve has raised its target range for the federal funds rate multiple times to a current target range of 5.25% to 5.50%, and the timing of any potential further increases or decreases remains uncertain. As of March 31, 2024, we had approximately $1.0 billion principal amount of fixed-rate debt, nil outstanding under our variable rate ABL Facility and $141.1 million outstanding under the variable rate Permian Transmission Term Loan (see Note 8 to the Interim Financial Statements). As of March 31, 2024, we had $126.9 million of interest rate exposure hedged to offset the impact of changes in interest rates on our Permian Transmission Term Loan.

C corporation conversion

In connection with the recently concluded strategic alternatives review, we evaluated various corporate structures to determine how to drive the greatest long-term value for unitholders. We believe converting to a C corporation positions us to maximize value by reducing investor tax burden going forward, enhancing trading liquidity, and expanding the universe of potential investors.

Key Matters for the Year ended December 31, 2023

The following items are reflected in our financial results for the fiscal year ended December 31, 2023:

• Strategic review. As we previously announced in October 2023, based on our recent and expected financial performance, as well as interest recently received from third parties for potential transactions, ranging from the sale of specific assets to consideration for the whole Partnership, the GP Board engaged external advisors to evaluate strategic alternatives for us with the goal of maximizing value for our unitholders. These alternatives could have included, but were not limited to, continued execution of our business plan, sale of assets, refinancing parts or the entirety of our capital structure, sale of the Partnership by merger or cash, or any combination of these and other alternatives.

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If the GP Board had decided to proceed with certain strategic transactions, they may not have been at a price that our investors view as attractive relative to the value of our standalone business. Additionally, the closing of any such transaction would have been dependent upon a number of factors that may have been beyond our control, including, among other factors, market conditions, regulatory factors, industry trends, the interest of third parties in our business and the availability of financing to potential buyers on reasonable terms. If the GP Board had decided not to proceed with a strategic transaction, this could have had a negative effect on the market price and volatility of our Units.

• Refinancing of 2025 Senior Notes. In November 2023, we entered into a private agreement to issue a total of $209.5 million aggregate principal amount of 12.00% Senior Notes due 2026 (the “2026 Unsecured Notes”) in exchange for $180.0 million aggregate principal amount of our existing 2025 Senior Notes and $29.5 million in cash (the “2023 Exchange”). The exchanged 2025 Senior Notes were cancelled. The cash raised was used to repurchase $29.7 million aggregate principal amount of existing 2025 Senior Notes (together with the 2023 Exchange, the “2023 Exchange Transactions”) that were not exchanged. As of December 31, 2023, following the consummation of the 2023 Exchange Transactions, approximately $49.8 million of 2025 Senior Notes remained outstanding. The 2026 Unsecured Notes bear interest at 12.00% and mature on October 15, 2026, in line with the maturity date of our 2026 Secured Notes. See “Summary — Recent Developments” for additional information regarding our 2026 Unsecured Notes.

• Integration of DJ Acquisitions. Our financial results for the year ended December 31, 2023 include our first full year with the assets acquired in the 2022 DJ Acquisitions (as defined herein). During 2023, we worked on integrating the 2022 DJ Acquisitions into our existing DJ Basin assets and began to achieve capital and operating synergies. Those integration efforts will continue into 2024.

Key Matters for the Year ended December 31, 2022

The following items are reflected in our financial results for the fiscal year ended 2022:

• Strategic DJ Acquisitions. On December 1, 2022, we completed the acquisition of 100% of the membership interests in Outrigger DJ Midstream LLC (“Outrigger DJ”) from Outrigger Energy II LLC for cash consideration of $165 million, subject to post-closing adjustments, and 100% of the membership interests in each of Sterling Energy Investments LLC, Grasslands Energy Marketing LLC and Centennial Water Pipelines LLC (collectively, “Sterling DJ”) from Sterling Investment Holdings LLC for cash consideration of $140 million, subject to post-closing adjustments, respectively, pursuant to definitive agreements, each dated October 14, 2022 (collectively, the “2022 DJ Acquisitions”).

As a result of the 2022 DJ Acquisitions, we acquired natural gas gathering and processing systems, a crude oil gathering system, freshwater rights, and a freshwater delivery system in the DJ Basin. The acquired assets of Outrigger DJ and Sterling DJ are located in Weld, Morgan, and Logan Counties, Colorado and Cheyenne County, Nebraska.

• Financing of 2022 DJ Acquisitions. The 2022 DJ Acquisitions were financed through a combination of cash on hand, borrowings under our ABL Facility. and the issuance of $85.0 million aggregate principal amount of additional 2026 Secured Notes.

• Sale of Non-Core Assets. On September 19, 2022, we completed the sale of Bison Midstream, LLC (“Bison Midstream”) and its gas gathering system in Burke and Mountrail Counties, North Dakota to a subsidiary of Steel Reef Infrastructure Corp., an integrated owner and operator of associated gas capture, gathering and processing assets in North Dakota and Saskatchewan. Additionally, on June 30, 2022, we completed the sale of Summit Midstream Permian, LLC (“Summit Permian”), which owns the Lane Gathering and Processing System (“Lane G&P System”), to Longwood Gathering and Disposal Systems, LP, a wholly-owned subsidiary of Matador Resources Company (“Matador”).

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• January 2022 Series A Preferred Unit Exchange. In January 2022, we completed an offer to exchange Series A Preferred Units for newly issued Common Units (the “2022 Preferred Exchange Offer”), whereby we issued 2,853,875 Common Units, net of Common Units withheld for withholding taxes, in exchange for 77,939 Series A Preferred Units. Upon the settlement of the 2022 Preferred Exchange Offer, we eliminated $92.6 million of the Series A Preferred Unit liquidation preference amount, inclusive of accrued distributions due as of the settlement date. See Note 12 to the Annual Financial Statements for additional information.

How We Evaluate Our Operations

Prior to the Utica Divestiture and the Mountaineer Divestiture, we conducted and reported our operations in the midstream energy industry through five reportable segments: Northeast, Rockies, Permian, Piceance and Barnett. Each of our reportable segments provides midstream services in a specific geographic area and our reportable segments reflect the way in which we internally report the financial information used to make decisions and allocate resources in connection with our operations (see Note 17 to the Annual Financial Statements and Note 15 to the Interim Financial Statements). Our management uses a variety of financial and operational metrics to analyze our consolidated and segment performance. We view these metrics as important factors in evaluating our profitability. These metrics include:

• throughput volume;

• revenues;

• operation and maintenance expenses;

• capital expenditures; and

• segment adjusted EBITDA.

We review these metrics on a regular basis for consistency and trend analysis.

Throughput Volume

The volume of (i) natural gas that we gather, compress, treat and/or process and (ii) crude oil and produced water that we gather depends on the level of production from natural gas or crude oil wells connected to our gathering systems. Aggregate production volumes are impacted by the overall amount of drilling and completion activity. Furthermore, because the production rate of natural gas and crude oil wells decline over time, production can only be maintained or increased by new drilling or other activity.

As a result, we must continually obtain new supplies of production to maintain or increase the throughput volume on our systems. Our ability to maintain or increase throughput volumes from existing customers and obtain new supplies of throughput is impacted by:

• successful drilling activity within our areas of mutual interest (“AMIs”);

• the level of work-overs and recompletions of wells on existing pad sites to which our gathering systems are connected;

• the number of new pad sites in our AMIs awaiting connections;

• our ability to compete for volumes from successful new wells in the areas in which we operate outside of our existing AMIs; and

• our ability to gather, treat and/or process production that has been released from commitments with our competitors.

We report volumes gathered for natural gas in cubic feet per day. We aggregate crude oil and produced water gathering and report volumes gathered in barrels per day.

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Revenues

Our revenues are primarily attributable to the volumes that we gather, compress, treat and/or process and the rates we charge for those services. A majority of our gathering and processing agreements are fee-based, which limits our direct exposure to fluctuations in commodity prices; however, certain of our contracts have rates that are directly impacted by commodity prices. We also have percent-of-proceeds arrangements with certain customers under which the gathering and processing revenues that we earn correlate directly with the fluctuating price of natural gas, condensate and NGLs.

Certain of our gathering and processing agreements contain MVCs pursuant to which our customers agree to ship or process a minimum volume of production on our gathering systems, or, in some cases, to pay a minimum monetary amount, over certain periods during the term of the MVC. These MVCs help us generate stable revenues and serve to mitigate the financial impact associated with declining volumes.

Operation and Maintenance Expenses

We seek to maximize the profitability of our operations in part by minimizing, to the extent appropriate, expenses directly tied to operating our assets. Direct labor costs, compression costs, ad valorem taxes, repair and non-capitalized maintenance costs, integrity management costs, utilities and contract services comprise the most significant portion of our operation and maintenance expense. Other than utilities expense, these expenses are largely independent of volumes delivered through our gathering systems but may fluctuate depending on the activities performed during a specific period.

Our operations and maintenance expenses also include costs that are reimbursed by our customers, which are included in Other revenues.

Segment Adjusted EBITDA

Segment adjusted EBITDA is a supplemental financial measure used by management and by external users of our financial statements such as investors, commercial banks, research analysts and others.

Segment adjusted EBITDA is used to assess:

• the ability of our assets to generate cash sufficient to make cash distributions and support our indebtedness;

• the financial performance of our assets without regard to financing methods, capital structure or historical cost basis;

• our operating performance and return on capital as compared to other companies in the midstream energy sector, without regard to financing or capital structure;

• the attractiveness of capital projects and acquisitions and the overall rates of return on alternative investment opportunities; and

• the financial performance of our assets without regard to (i) income or loss from equity method investees, (ii) the impact of the timing of MVC shortfall payments under our gathering agreements or (iii) the timing of impairments or other noncash income or expense items.

Additional Information

For additional information, see the “Results of Operations” section herein and the notes to the Annual Financial Statements.

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Results of Operations

Consolidated Overview for the Three Months Ended March 31, 2024 and 2023

The following table presents certain consolidated financial and operating data.

	Three Months Ended March 31,						Percentage Change
	2024			2023			Percentage Change
	(in thousands)
Revenues:
Gathering services and related fees	$	61,985		$	57,371		8	%
Natural gas, NGLs and condensate sales		49,092			49,163		0	%
Other revenues		7,794			5,965		31	%
Total revenues		118,871			112,499		6	%
Costs and expenses:
Cost of natural gas and NGLs		30,182			30,882		(2	%)
Operation and maintenance		25,012			23,972		4	%
General and administrative		14,785			9,987		48	%
Depreciation and amortization		27,867			29,824		(7	%)
Transaction costs		7,791			302		*
Acquisition integration costs		40			1,502		(97	%)
Gain on asset sales, net		(27	)		(68	)	(60	%)
Long-lived asset impairment		67,916			—		*
Total costs and expenses		173,566			96,401		80	%
Other income (expense), net		(13	)		56		(123	%)
Gain (loss) on interest rate swaps		2,590			(1,273	)	(303	%)
Gain on sale of business		86,202			18		*
Gain on sale of equity method investment		126,261			—		*
Interest expense		(37,846	)		(34,223	)	11	%
Income (loss) before income taxes and equity method investment income		122,499			(19,324	)	(734	%)
Income tax (expense) benefit		(210	)		252		(183	%)
Income from equity method investees		10,638			4,909		117	%
Net income (loss)	$	132,927		$	(14,163	)	*

Volume throughput(1):
Aggregate average daily throughput – natural gas (MMcf/d)		1,327			1,185		12	%
Aggregate average daily throughput – liquids (Mbbl/d)		74			74		0	%

____________

(1) Excludes volume throughput for Ohio Gathering and Double E. For additional information, see the Northeast and Permian sections herein under the caption “Segment Overview for the Three Months Ended March 31, 2024 and 2023.”

Volumes — Gas

Natural gas throughput volumes increased 142 MMcf/d for the three months ended March 31, 2024 compared to the three months ended March 31, 2023, primarily reflecting:

• a volume throughput increase of 121 MMcf/d for the Northeast segment.

• a volume throughput increase of 25 MMcf/d for the Piceance segment.

• a volume throughput increase of 16 MMcf/d for the Rockies segment.

• a volume throughput decrease of 20 MMcf/d for the Barnett segment.

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Volumes — Liquids

Crude oil and produced water throughput volumes at the Rockies segment remained consistent for the three months ended March 31, 2024, compared to the three months ended March 31, 2023, primarily as a result of 60 new well connections that came online subsequent to March 31, 2023, offset by natural production declines.

For additional information on volumes, see the “Segment Overview for the Three Months Ended March 31, 2024 and 2023” section herein.

Revenues

Total revenues increased $6.4 million during the three months ended March 31, 2024 compared to the three months ended March 31, 2023, comprised of a $4.6 million increase in gathering services and related fees, a $1.8 million increase in other revenue; offset by a $0.1 million decrease in natural gas, NGLs and condensate sales.

Gathering Services and Related Fees

Gathering services and related fees increased $4.6 million compared to the three months ended March 31, 2023, primarily reflecting:

• a $4.1 million increase in the Northeast, primarily due to increased volume throughput;

• a $1.3 million increase in the Piceance, primarily due to increased volume throughput;

• a $1.2 million increase in the Rockies, primarily due to increased volume throughput; offset by

• a $2.0 million decrease in the Barnett, primarily due to decreased volume throughput.

Natural Gas, NGLs and Condensate Sales

Natural gas, NGLs and condensate revenues decreased $0.1 million compared to the three months ended March 31, 2023.

Costs and Expenses

Total costs and expenses increased $77.2 million during the three months ended March 31, 2024 compared to the three months ended March 31, 2023.

Cost of Natural Gas and NGLs

Cost of natural gas and NGLs decreased $0.7 million for the three months ended March 31, 2024, compared to the three months ended March 31, 2023.

Operation and Maintenance

Operation and maintenance expense increased $1.0 million for the three months ended March 31, 2024, compared to the three months ended March 31, 2023.

Acquisition Integration Costs

Acquisition integration costs in 2023 were primarily related to costs associated with the ongoing integration of the 2022 DJ Acquisitions.

Long-lived asset impairments

During the quarterly period ended March 31, 2024, we recognized an impairment charge of $67.9 million in connection with the Mountaineer Divestiture.

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Interest Expense

Interest expense increased $3.6 million for the three months ended March 31, 2024, compared to three months ended March 31, 2023, primarily due to $6.3 million of increased borrowing costs on the recently issued 2026 Unsecured Notes, partially offset by $3.0 million of reduced interest expense as a result of the exchange and repurchase of $209.7 million of the 2025 Senior Notes that occurred in November 2023.

Consolidated Overview for the Years Ended December 31, 2023 and 2022

The following table presents certain consolidated data and volume throughput for the years ended December 31, 2023 and 2022.

	Year Ended December 31,						Percentage Change
	2023			2022			Percentage Change
	(in thousands)
Revenues:
Gathering services and related fees	$	248,223		$	248,358		—	%
Natural gas, NGLs and condensate sales		179,254			86,225		108	%
Other revenues		31,426			35,011		(10	%)
Total revenues		458,903			369,594		24	%
Costs and expenses:
Cost of natural gas and NGLs		112,462			76,826		46	%
Operation and maintenance		100,741			84,152		20	%
General and administrative		42,135			44,943		(6	%)
Depreciation and amortization		122,764			119,055		3	%
Acquisition integration costs		2,654			—		*
Transaction costs		1,251			6,968		(82	%)
Gain on asset sales, net		(260	)		(507	)	(49	%)
Long-lived asset impairment		540			91,644		(99	%)
Total costs and expenses		382,287			423,081		(10	%)
Other income (expense), net		865			(4	)	*
Gain on interest rate swaps		1,830			16,414		(89	%)
Loss on sale of business		(47	)		(1,741	)	(97	%)
Interest expense		(140,784	)		(102,459	)	37	%
Loss on early extinguishment of debt		(10,934	)		—		*
Loss before income taxes and equity method investment income		(72,454	)		(141,277	)	(49	%)
Income tax expense		(322	)		(325	)	(1	%)
Income from equity method investees		33,829			18,141		86	%
Net loss	$	(38,947	)	$	(123,461	)	(68	%)

Volume throughput(1):
Aggregate average daily throughput – natural gas (MMcf/d)		1,292			1,208		7	%
Aggregate average daily throughput – liquids (Mbbl/d)		78			62		26	%

____________

* Not considered meaningful

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Volumes — Gas

Natural gas throughput volumes increased 84 MMcf/d for the year ended December 31, 2023 compared to the year ended December 31, 2022, primarily reflecting:

• a volume throughput increase of 40 MMcf/d for the Northeast segment.

• a volume throughput decrease of 2 MMcf/d for the Piceance segment.

• a volume throughput decrease of 14 MMcf/d for the Permian segment.

• a volume throughput decrease of 20 MMcf/d for the Barnett segment.

• a volume throughput increase of 80 MMcf/d for the Rockies segment.

Volumes — Liquids

Crude oil and produced water volume throughput for the Rockies segment increased 16 Mbbl/d for the year ended December 31, 2023 compared to the year ended December 31, 2022, primarily as a result of 65 new well connections that came online during 2023, offset by natural production declines and weather related downtime.

For additional information on volumes, see the “Segment Overview for the Years Ended December 31, 2023 and 2022” section herein.

Revenues

Total revenues increased $89.3 million during the year ended December 31, 2023 compared to the year ended December 31, 2022 comprised of a $93.0 million increase in natural gas, NGLs and condensate sales, offset by a $3.6 million decrease in Other revenues, and a $0.1 million decrease in gathering services and related fees.

Gathering services and related fees

Gathering services and related fees decreased $0.1 million compared to the year ended December 31, 2022, primarily reflecting:

• a $4.3 million decrease in the Barnett, primarily due to production curtailments associated with a significant reduction in commodity pricing;

• a $3.7 million decrease in the Permian, primarily due to the disposition of the Lane G&P System in June 2022;

• a $2.0 million decrease in the Rockies, primarily due to decreased volume throughput and the expiration of a customer’s MVC contract in the DJ Basin; partially offset by

• a $9.4 million increase in the Northeast, primarily due to increased volume throughput,

Natural Gas, NGLs and Condensate Sales

Natural gas, NGLs and condensate sales revenue increased $93.0 million compared to the year ended December 31, 2022, primarily reflecting:

• a $114.5 million increase in the Rockies reportable segment, primarily due to the 2022 DJ Acquisitions, partially offset by the disposition of Bison Midstream in September 2022; offset by

• a $17.4 million decrease in the Permian reportable segment, primarily due to the disposition of the Lane G&P System in June 2022;

• a $2.3 million decrease in the Piceance reportable segment;

• a $1.7 million decrease in the Barnett reportable segment.

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Costs and expenses

Total costs and expenses decreased $40.8 million during the year ended December 31, 2023 compared to the year ended December 31, 2022, primarily reflecting:

Cost of natural gas and NGLs

Cost of natural gas and NGLs increased $35.6 million during the year ended December 31, 2023 compared to the year ended December 31, 2022, primarily driven by the 2022 DJ Acquisitions in December 2022, partially offset by the disposition of the Lane G&P System in June 2022 and the disposition of Bison Midstream in September 2022.

Operation and maintenance

Operation and maintenance expense increased $16.6 million for the year ended December 31, 2023 compared to the year ended December 31, 2022; primarily as a result of the acquisitions of Sterling DJ and Outrigger DJ in December 2022, partially offset by the disposition of the Lane G&P System in June 2022 and the disposition of Bison Midstream in September 2022.

Asset Impairments

In 2022, we recognized impairments of $84.5 million related to the disposition of the Lane G&P System and $6.9 million in connection with disposition of Bison Midstream. In 2023, we recognized impairments of $0.5 million.

Interest Expense

Interest expense increased $38.3 million during the year ended December 31, 2023 compared to the year ended December 31, 2022 primarily due to $18.0 million of increased borrowing costs on the ABL Facility resulting from higher interest rates and borrowings throughout 2023 compared to 2022, $7.0 million of increased borrowing costs resulting from the issuance of $85.0 million of 2026 Secured Notes to fund the 2022 DJ Acquisitions, $4.9 million of higher borrowing costs on the Permian Transmission Term Loan, $4.5 million of increased borrowing costs on the 2026 Secured Notes, $3.4 million of increased amortization of debt issuance costs and $3.1 million of borrowing costs on the newly issued 2026 Unsecured Notes.

See Note 9 — Debt to the Annual Financial Statements for additional details. Interest expense does not include the impact of gains or losses from our interest rate swaps entered into for the Permian Transmission Credit Facilities.

Segment Overview for the Three Months Ended March 31, 2024 and 2023

Northeast

Volume throughput for the Northeast reportable segment follows.

	Northeast
	Three Months Ended March 31,		Percentage Change
	2024	2023	Percentage Change
Average daily throughput (MMcf/d)	712	591	20	%
Average daily throughput (MMcf/d) (Ohio Gathering)	849	636	33	%

On March 22, 2024, we completed the disposition of Summit Utica. Summit Utica is also the owner of our equity method investment, Ohio Gathering.

Volume throughput for the Northeast, excluding Ohio Gathering, increased 20% compared to the three months ended March 31, 2023, primarily due to 29 well connections that came online subsequent to March 31, 2023, partially offset by natural production declines as well as the disposition of Summit Utica as discussed above.

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Volume throughput for the Ohio Gathering system increased 33%, compared to the three months ended March 31, 2023, primarily as a result of 43 new well connections that came online subsequent to March 31, 2023, partially offset by natural production declines as well as the disposition of Summit Utica as discussed above, which owns an interest in the Ohio Gathering system.

Financial data for our Northeast reportable segment follows.

	Northeast
	Three Months Ended March 31,						Percentage Change
	2024			2023			Percentage Change
	(in thousands)
Revenues:
Gathering services and related fees	$	16,853		$	12,755		32	%
Total revenues		16,853			12,755		32	%
Costs and expenses:
Operation and maintenance		1,893			2,085		(9	%)
General and administrative		201			210		(4	%)
Depreciation and amortization		4,248			4,453		(5	%)
Long-lived asset impairment		67,916			—		*
Total costs and expenses		74,258			6,748		*
Add:
Depreciation and amortization		4,248			4,453
Adjustments related to capital reimbursement activity		(20	)		(20	)
Long-lived asset impairment		67,916			—
Proportional adjusted EBITDA for Ohio Gathering(1)		14,282			7,414		93	%
Segment adjusted EBITDA	$	29,021		$	17,854		63	%

____________

* Not considered meaningful

(1) The Partnership records financial results of its investment in Ohio Gathering on a one-month lag based on financial information available to us during the reporting period. With the divestiture of Ohio Gathering in March 2024, proportional adjusted EBITDA includes financial results from December 1, 2023 through March 22, 2024 ($2.5 million for March 1, 2024 – March 22, 2024).

Three months ended March 31, 2024

Segment adjusted EBITDA increased $11.2 million, compared to the three months ended March 31, 2023 primarily as the result of an increase of $6.9 million, in proportional adjusted EBITDA from Ohio Gathering during the three months ended March 31, 2024, as well as an increase in gathering services and related fees. These results were partially offset by the disposition of Summit Utica on March 22, 2024.

Rockies

Volume throughput for our Rockies reportable segment follows.

	Rockies
	Three Months Ended March 31,		Percentage Change
	2024	2023	Percentage Change
Aggregate average daily throughput – natural gas (MMcf/d)	124	108	15	%
Aggregate average daily throughput – liquids (Mbbl/d)	74	74	*

Natural gas

Natural gas volume throughput increased 15% compared to the three months ended March 31, 2023, primarily reflecting 120 new well connections that came online subsequent to March 31, 2023, partially offset by winter related interruptions which occurred during the first quarter of 2024.

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For the three months ended March 31, 2024 and 2023, costs of natural gas and NGLs includes $11.2 million and $10.9 million, respectively, of gathering fees collected under percentage of proceeds arrangements.

Liquids

Liquids volume throughput remained consistent compared to the three months ended March 31, 2023, primarily associated with 60 new well connections that came online subsequent to March 31, 2023 offset by natural production declines.

Financial data for our Rockies reportable segment follows.

	Rockies
	Three Months Ended March 31,				Percentage Change
	2024		2023		Percentage Change
	(in thousands)
Revenues:
Gathering services and related fees	$	16,516	$	15,303	8	%
Natural gas, NGLs and condensate sales		47,970		47,329	1	%
Other revenues