Hess Midstream LP

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 10-K

☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended December 31,2025

OR

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from to

Commission File Number 001-39163

Hess Midstream LP

(Exact name of registrant as specified in its charter)

(Registrant’s telephone number, including area code, is (832)854-1000)

Securities registered pursuant to Section 12(b) of the Act:

Securities registered pursuant to Section 12(g) of the Act: None.

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes ☒ No☐

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. Yes☐ No ☒

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☒ No☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ☒ No☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

If an emerging growth company, indicate by checkmark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.☐

Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report. Yes☒ No☐

If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in the filing reflect the correction of an error to previously issued financial statements.☐

Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation received by any of the registrant’s executive officers during the relevant recovery period pursuant to §240.10D-1(b). ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act). Yes☐ No☒

The aggregate market value of Class A shares held by non‑affiliates of the registrant amounts to $5.0 billion, computed using the outstanding Class A shares and closing market price on June 30, 2025, the last business day of the registrant’s most recently completed second fiscal quarter.

129,403,244 Class A shares representing limited partner interests in the registrant were outstanding as of February 18, 2026.

TABLE OFCONTENTS

CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS

This Annual Report on Form 10-K, including information incorporated by reference herein, contains “forward-looking statements.” Words such as “anticipate,” “estimate,” “expect,” “forecast,” “guidance,” “drive,” “could,” “may,” “should,” “would,” “enable,” “believe,” “intend,” “focus,” “potential,” “project,” “plan,” “trend,” “predict,” “will,” “target,” “opportunity” and similar expressions, and variations or negatives of these words, are intended to identify forward-looking statements, but not all forward-looking statements include such words.

Forward-looking statements relating to the Company’s operations, assets, and strategy are based on management’s current expectations, assessments, estimates, projections and assumptions about the industry. These statements are not guarantees of future performance and are subject to numerous risks, uncertainties and other factors, many of which are beyond the Company’s control and difficult to predict. Therefore, actual outcomes and results may differ materially from our current projections or expectations of future results expressed or forecasted by these forward-looking statements. Among the important factors that could cause actual results to differ materially from those in our forward-looking statements are:

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the ability of Chevron and other parties to satisfy their obligations to us, including Chevron’s ability to meet its drilling and development plans on a timely basis or at all, its ability to deliver its nominated volumes to us, and the operation of joint ventures that we may not control;

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our ability to generate sufficient cash flow to pay current and expected levels of distributions;

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reductions in the volumes of crude oil, natural gas, NGLs and produced water we gather, process, terminal or store;

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the actual volumes we gather, process, terminal or store for Chevron in excess of our MVCs and relative to Chevron’s nominations;

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fluctuations in the prices and demand for crude oil, natural gas and NGLs;

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changes in global economic conditions and the effects of a global economic downturn or inflation on our business and the businesses of our suppliers, customers, business partners and lenders;

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our ability to comply with government regulations or make capital expenditures required to maintain compliance, including our ability to obtain or maintain permits necessary for capital projects in a timely manner, if at all, or the revocation or modification of existing permits;

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our ability to successfully identify, evaluate and timely execute our capital projects, investment opportunities and growth strategies, whether through organic growth or acquisitions;

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costs or liabilities associated with federal, state and local laws, regulations and governmental actions applicable to our business, including legislation and regulatory initiatives relating to environmental protection and health and safety, such as spills, releases, pipeline integrity and measures to limit greenhouse gas emissions and climate change;

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our ability to comply with the terms of our credit facility, indebtedness and other financing arrangements, which, if accelerated, we may not be able to repay;

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reduced demand for our midstream services, including the impact of weather or the availability of competing third-party midstream gathering, processing and transportation operations;

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potential disruption or interruption of our business due to natural and human causes beyond our control, such as accidents, severe weather events, labor disputes, political crises, information technology failures, constraints or disruptions and cyber-attacks;

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any limitations on our ability to access debt or capital markets on terms that we deem acceptable, including as a result of changes in credit ratings, weakness in the oil and gas industry or negative outcomes within commodity and financial markets;

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liability resulting from litigation;

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risks and uncertainties associated with Hess Corporation’s (“Hess”) integration with Chevron following the completion of the Merger, including the failure of Chevron to realize anticipated synergies of the Merger in the expected timeframe, operational challenges, the diversion of management’s attention from ongoing business concerns, or unforeseen expenses associated with the Merger; and

•

other factors described in Item 1A—Risk Factors in this Annual Report on Form 10-K and any additional risks described in our other filings with the Securities and Exchange Commission.

Other unpredictable or unknown factors not discussed in this Annual Report could also cause actual results to differ materially from those in our forward-looking statements. Caution should be taken not to place undue reliance on any such forward-looking statements since such statements speak only as of the date of this report. Except as required by law, we undertake no obligation to publicly update or revise any forward-looking statements, whether because of new information, future events or otherwise.

Unless otherwise stated or the context otherwise indicates, references in this report to “Hess Midstream Operations LP,” the “Partnership,” “us,” “we,” “our” or similar terms, when referring to periods between April 10, 2017 and December 16, 2019, refer to Hess Midstream Operations LP (formerly known as Hess Midstream Partners LP, the predecessor registrant to Hess Midstream LP), including its consolidated subsidiaries. All references to “Hess Midstream LP,” the “Company,” “us,” “our,” “we” or similar terms, when referring to periods subsequent to December 16, 2019, refer to Hess Midstream LP and its consolidated subsidiaries. References to “Sponsor” or “Sponsors” refer to (a) Hess and GIP II Blue Holding, L.P. (“GIP”) when referring to periods prior to May 30, 2025, (b) Hess from May 30, 2025 to July 17, 2025, and (c) Chevron from July 18, 2025.

As used in this report, the term “Chevron” may refer to Chevron Corporation, one or more of its consolidated subsidiaries, or to all of them taken as a whole. All of these terms are used for convenience only and are not intended as a precise description of any of the separate companies, each of which manages its own affairs.

GLOSSARY OF TERMS

Throughout this report, the following company or industry specific terms and abbreviations are used:

Barrel: One stock tank barrel, or 42 U.S. gallons liquid volume, used in reference to crude oil or other liquid hydrocarbons.

Bbl(s): Barrel(s).

Bbl/d: Barrels per day.

Btu: One British thermal unit—a measure of the amount of energy required to raise the temperature of a one‑pound mass of water one degree Fahrenheit at sea level.

Cf: Cubic foot or feet is a common unit of gas measurement. One standard cubic foot equals the volume of gas in one cubic foot measured at standard temperature (60 degrees Fahrenheit) and standard pressure (14.73 pounds standard per square inch).

CNG: Compressed natural gas.

Crude oil: A mixture of hydrocarbons that exists in liquid phase in underground reservoirs.

Fractionation: Fractionation is accomplished by controlling the temperature and pressure of the stream of mixed NGL in order to take advantage of the different boiling points of separate components. NGL fractionation facilities separate mixed NGL streams into discrete components such as ethane, propane, normal butane, isobutane and natural gasoline.

Liquefied petroleum gas: A mixture of hydrocarbon gases commonly used as a fuel, including propane and butane.

MBbl: One thousand barrels.

MBbl/d: One thousand barrels per day.

Mcf: One thousand cubic feet.

Mdge/d: One thousand diesel gallons equivalent per day.

Mgal/d: One thousand gallons per day.

MMcf/d: One million cubic feet per day.

MVC: Minimum volume commitment.

NGL: Natural gas liquids, which are the hydrocarbon liquids contained within natural gas.

Psi: Pounds per square inch.

Psig: Pounds per square inch gauge.

Throughput: The volume of crude oil, natural gas, NGLs, water and refined petroleum products transported or passing through a pipeline, plant, terminal or other facility during a particular period.

Williston Basin: One of the largest structural-sedimentary basins in North America, spanning across North Dakota, South Dakota, Montana, Saskatchewan and Manitoba, with a surface area of approximately 143,000 square miles within the United States and multiple petroleum reservoirs.

Y‑grade: A classification used to describe the extent to which certain hydrocarbons can be stored at a specified pressure, making the hydrocarbon easier to move in a liquid state.